Merge branch 'linus' into perfcounters/core

Merge reason: This brach was on -rc1, refresh it to almost-rc4 to pick up
              the latest upstream fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

34 files changed, 7676 insertions, 0 deletions

diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile
new file mode 100644
index 00000000000..da94bec4ecb
--- /dev/null
+++ b/arch/microblaze/kernel/Makefile
@@ -0,0 +1,19 @@
+#
+# Makefile
+#
+
+extra-y := head.o vmlinux.lds
+
+obj-y += exceptions.o \
+	hw_exception_handler.o init_task.o intc.o irq.o of_device.o \
+	of_platform.o process.o prom.o prom_parse.o ptrace.o \
+	setup.o signal.o sys_microblaze.o timer.o traps.o
+
+obj-y += cpu/
+
+obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
+obj-$(CONFIG_SELFMOD)		+= selfmod.o
+obj-$(CONFIG_HEART_BEAT)	+= heartbeat.o
+obj-$(CONFIG_MODULES)		+= microblaze_ksyms.o module.o
+
+obj-y	+= entry$(MMUEXT).o
diff --git a/arch/microblaze/kernel/asm-offsets.c b/arch/microblaze/kernel/asm-offsets.c
new file mode 100644
index 00000000000..aabd9e9423a
--- /dev/null
+++ b/arch/microblaze/kernel/asm-offsets.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/stddef.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/ptrace.h>
+#include <linux/hardirq.h>
+#include <linux/thread_info.h>
+#include <linux/kbuild.h>
+
+int main(int argc, char *argv[])
+{
+	/* struct pt_regs */
+	DEFINE(PT_SIZE, sizeof(struct pt_regs));
+	DEFINE(PT_MSR, offsetof(struct pt_regs, msr));
+	DEFINE(PT_EAR, offsetof(struct pt_regs, ear));
+	DEFINE(PT_ESR, offsetof(struct pt_regs, esr));
+	DEFINE(PT_FSR, offsetof(struct pt_regs, fsr));
+	DEFINE(PT_PC, offsetof(struct pt_regs, pc));
+	DEFINE(PT_R0, offsetof(struct pt_regs, r0));
+	DEFINE(PT_R1, offsetof(struct pt_regs, r1));
+	DEFINE(PT_R2, offsetof(struct pt_regs, r2));
+	DEFINE(PT_R3, offsetof(struct pt_regs, r3));
+	DEFINE(PT_R4, offsetof(struct pt_regs, r4));
+	DEFINE(PT_R5, offsetof(struct pt_regs, r5));
+	DEFINE(PT_R6, offsetof(struct pt_regs, r6));
+	DEFINE(PT_R7, offsetof(struct pt_regs, r7));
+	DEFINE(PT_R8, offsetof(struct pt_regs, r8));
+	DEFINE(PT_R9, offsetof(struct pt_regs, r9));
+	DEFINE(PT_R10, offsetof(struct pt_regs, r10));
+	DEFINE(PT_R11, offsetof(struct pt_regs, r11));
+	DEFINE(PT_R12, offsetof(struct pt_regs, r12));
+	DEFINE(PT_R13, offsetof(struct pt_regs, r13));
+	DEFINE(PT_R14, offsetof(struct pt_regs, r14));
+	DEFINE(PT_R15, offsetof(struct pt_regs, r15));
+	DEFINE(PT_R16, offsetof(struct pt_regs, r16));
+	DEFINE(PT_R17, offsetof(struct pt_regs, r17));
+	DEFINE(PT_R18, offsetof(struct pt_regs, r18));
+	DEFINE(PT_R19, offsetof(struct pt_regs, r19));
+	DEFINE(PT_R20, offsetof(struct pt_regs, r20));
+	DEFINE(PT_R21, offsetof(struct pt_regs, r21));
+	DEFINE(PT_R22, offsetof(struct pt_regs, r22));
+	DEFINE(PT_R23, offsetof(struct pt_regs, r23));
+	DEFINE(PT_R24, offsetof(struct pt_regs, r24));
+	DEFINE(PT_R25, offsetof(struct pt_regs, r25));
+	DEFINE(PT_R26, offsetof(struct pt_regs, r26));
+	DEFINE(PT_R27, offsetof(struct pt_regs, r27));
+	DEFINE(PT_R28, offsetof(struct pt_regs, r28));
+	DEFINE(PT_R29, offsetof(struct pt_regs, r29));
+	DEFINE(PT_R30, offsetof(struct pt_regs, r30));
+	DEFINE(PT_R31, offsetof(struct pt_regs, r31));
+	DEFINE(PT_MODE, offsetof(struct pt_regs, pt_mode));
+	BLANK();
+
+	/* Magic offsets for PTRACE PEEK/POKE etc */
+	DEFINE(PT_TEXT_ADDR, sizeof(struct pt_regs) + 1);
+	DEFINE(PT_TEXT_LEN, sizeof(struct pt_regs) + 2);
+	DEFINE(PT_DATA_ADDR, sizeof(struct pt_regs) + 3);
+	BLANK();
+
+	/* struct task_struct */
+	DEFINE(TS_THREAD_INFO, offsetof(struct task_struct, stack));
+
+	/* struct thread_info */
+	DEFINE(TI_TASK, offsetof(struct thread_info, task));
+	DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain));
+	DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
+	DEFINE(TI_STATUS, offsetof(struct thread_info, status));
+	DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
+	DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count));
+	DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
+	DEFINE(TI_RESTART_BLOCK, offsetof(struct thread_info, restart_block));
+	DEFINE(TI_CPU_CONTEXT, offsetof(struct thread_info, cpu_context));
+	BLANK();
+
+	/* struct cpu_context */
+	DEFINE(CC_R1, offsetof(struct cpu_context, r1)); /* r1 */
+	DEFINE(CC_R2, offsetof(struct cpu_context, r2));
+	/* dedicated registers */
+	DEFINE(CC_R13, offsetof(struct cpu_context, r13));
+	DEFINE(CC_R14, offsetof(struct cpu_context, r14));
+	DEFINE(CC_R15, offsetof(struct cpu_context, r15));
+	DEFINE(CC_R16, offsetof(struct cpu_context, r16));
+	DEFINE(CC_R17, offsetof(struct cpu_context, r17));
+	DEFINE(CC_R18, offsetof(struct cpu_context, r18));
+	/* non-volatile registers */
+	DEFINE(CC_R19, offsetof(struct cpu_context, r19));
+	DEFINE(CC_R20, offsetof(struct cpu_context, r20));
+	DEFINE(CC_R21, offsetof(struct cpu_context, r21));
+	DEFINE(CC_R22, offsetof(struct cpu_context, r22));
+	DEFINE(CC_R23, offsetof(struct cpu_context, r23));
+	DEFINE(CC_R24, offsetof(struct cpu_context, r24));
+	DEFINE(CC_R25, offsetof(struct cpu_context, r25));
+	DEFINE(CC_R26, offsetof(struct cpu_context, r26));
+	DEFINE(CC_R27, offsetof(struct cpu_context, r27));
+	DEFINE(CC_R28, offsetof(struct cpu_context, r28));
+	DEFINE(CC_R29, offsetof(struct cpu_context, r29));
+	DEFINE(CC_R30, offsetof(struct cpu_context, r30));
+	/* special purpose registers */
+	DEFINE(CC_MSR, offsetof(struct cpu_context, msr));
+	DEFINE(CC_EAR, offsetof(struct cpu_context, ear));
+	DEFINE(CC_ESR, offsetof(struct cpu_context, esr));
+	DEFINE(CC_FSR, offsetof(struct cpu_context, fsr));
+	BLANK();
+
+	return 0;
+}
diff --git a/arch/microblaze/kernel/cpu/Makefile b/arch/microblaze/kernel/cpu/Makefile
new file mode 100644
index 00000000000..20646e54927
--- /dev/null
+++ b/arch/microblaze/kernel/cpu/Makefile
@@ -0,0 +1,8 @@
+#
+# Build the appropriate CPU version support
+#
+
+EXTRA_CFLAGS += -DCPU_MAJOR=$(CPU_MAJOR) -DCPU_MINOR=$(CPU_MINOR) \
+		-DCPU_REV=$(CPU_REV)
+
+obj-y += cache.o cpuinfo.o cpuinfo-pvr-full.o cpuinfo-static.o mb.o pvr.o
diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c
new file mode 100644
index 00000000000..af866a45012
--- /dev/null
+++ b/arch/microblaze/kernel/cpu/cache.c
@@ -0,0 +1,255 @@
+/*
+ * Cache control for MicroBlaze cache memories
+ *
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file COPYING in the main directory of this
+ * archive for more details.
+ */
+
+#include <asm/cacheflush.h>
+#include <linux/cache.h>
+#include <asm/cpuinfo.h>
+
+/* Exported functions */
+
+void _enable_icache(void)
+{
+	if (cpuinfo.use_icache) {
+#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
+		__asm__ __volatile__ ("					\
+				msrset	r0, %0;				\
+				nop; "					\
+				:					\
+				: "i" (MSR_ICE)				\
+				: "memory");
+#else
+		__asm__ __volatile__ ("					\
+				mfs	r12, rmsr;			\
+				nop;					\
+				ori	r12, r12, %0;			\
+				mts	rmsr, r12;			\
+				nop; "					\
+				:					\
+				: "i" (MSR_ICE)				\
+				: "memory", "r12");
+#endif
+	}
+}
+
+void _disable_icache(void)
+{
+	if (cpuinfo.use_icache) {
+#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
+		__asm__ __volatile__ ("					\
+				msrclr r0, %0;				\
+				nop; "					\
+				:					\
+				: "i" (MSR_ICE)				\
+				: "memory");
+#else
+		__asm__ __volatile__ ("					\
+				mfs	r12, rmsr;			\
+				nop;					\
+				andi	r12, r12, ~%0;			\
+				mts	rmsr, r12;			\
+				nop; "					\
+				:					\
+				: "i" (MSR_ICE)				\
+				: "memory", "r12");
+#endif
+	}
+}
+
+void _invalidate_icache(unsigned int addr)
+{
+	if (cpuinfo.use_icache) {
+		__asm__ __volatile__ ("					\
+				wic	%0, r0"				\
+				:					\
+				: "r" (addr));
+	}
+}
+
+void _enable_dcache(void)
+{
+	if (cpuinfo.use_dcache) {
+#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
+		__asm__ __volatile__ ("					\
+				msrset	r0, %0;				\
+				nop; "					\
+				:					\
+				: "i" (MSR_DCE)				\
+				: "memory");
+#else
+		__asm__ __volatile__ ("					\
+				mfs	r12, rmsr;			\
+				nop;					\
+				ori	r12, r12, %0;			\
+				mts	rmsr, r12;			\
+				nop; "					\
+				:					\
+				: "i" (MSR_DCE)			\
+				: "memory", "r12");
+#endif
+	}
+}
+
+void _disable_dcache(void)
+{
+#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
+		__asm__ __volatile__ ("					\
+				msrclr	r0, %0;				\
+				nop; "					\
+				:					\
+				: "i" (MSR_DCE)			\
+				: "memory");
+#else
+		__asm__ __volatile__ ("					\
+				mfs	r12, rmsr;			\
+				nop;					\
+				andi	r12, r12, ~%0;			\
+				mts	rmsr, r12;			\
+				nop; "					\
+				:					\
+				: "i" (MSR_DCE)			\
+				: "memory", "r12");
+#endif
+}
+
+void _invalidate_dcache(unsigned int addr)
+{
+		__asm__ __volatile__ ("					\
+				wdc	%0, r0"				\
+				:					\
+				: "r" (addr));
+}
+
+void __invalidate_icache_all(void)
+{
+	unsigned int i;
+	unsigned flags;
+
+	if (cpuinfo.use_icache) {
+		local_irq_save(flags);
+		__disable_icache();
+
+		/* Just loop through cache size and invalidate, no need to add
+			CACHE_BASE address */
+		for (i = 0; i < cpuinfo.icache_size;
+			i += cpuinfo.icache_line)
+				__invalidate_icache(i);
+
+		__enable_icache();
+		local_irq_restore(flags);
+	}
+}
+
+void __invalidate_icache_range(unsigned long start, unsigned long end)
+{
+	unsigned int i;
+	unsigned flags;
+	unsigned int align;
+
+	if (cpuinfo.use_icache) {
+		/*
+		 * No need to cover entire cache range,
+		 * just cover cache footprint
+		 */
+		end = min(start + cpuinfo.icache_size, end);
+		align = ~(cpuinfo.icache_line - 1);
+		start &= align; /* Make sure we are aligned */
+		/* Push end up to the next cache line */
+		end = ((end & align) + cpuinfo.icache_line);
+
+		local_irq_save(flags);
+		__disable_icache();
+
+		for (i = start; i < end; i += cpuinfo.icache_line)
+			__invalidate_icache(i);
+
+		__enable_icache();
+		local_irq_restore(flags);
+	}
+}
+
+void __invalidate_icache_page(struct vm_area_struct *vma, struct page *page)
+{
+	__invalidate_icache_all();
+}
+
+void __invalidate_icache_user_range(struct vm_area_struct *vma,
+				struct page *page, unsigned long adr,
+				int len)
+{
+	__invalidate_icache_all();
+}
+
+void __invalidate_cache_sigtramp(unsigned long addr)
+{
+	__invalidate_icache_range(addr, addr + 8);
+}
+
+void __invalidate_dcache_all(void)
+{
+	unsigned int i;
+	unsigned flags;
+
+	if (cpuinfo.use_dcache) {
+		local_irq_save(flags);
+		__disable_dcache();
+
+		/*
+		 * Just loop through cache size and invalidate,
+		 * no need to add CACHE_BASE address
+		 */
+		for (i = 0; i < cpuinfo.dcache_size;
+			i += cpuinfo.dcache_line)
+				__invalidate_dcache(i);
+
+		__enable_dcache();
+		local_irq_restore(flags);
+	}
+}
+
+void __invalidate_dcache_range(unsigned long start, unsigned long end)
+{
+	unsigned int i;
+	unsigned flags;
+	unsigned int align;
+
+	if (cpuinfo.use_dcache) {
+		/*
+		 * No need to cover entire cache range,
+		 * just cover cache footprint
+		 */
+		end = min(start + cpuinfo.dcache_size, end);
+		align = ~(cpuinfo.dcache_line - 1);
+		start &= align; /* Make sure we are aligned */
+		/* Push end up to the next cache line */
+		end = ((end & align) + cpuinfo.dcache_line);
+		local_irq_save(flags);
+		__disable_dcache();
+
+		for (i = start; i < end; i += cpuinfo.dcache_line)
+			__invalidate_dcache(i);
+
+		__enable_dcache();
+		local_irq_restore(flags);
+	}
+}
+
+void __invalidate_dcache_page(struct vm_area_struct *vma, struct page *page)
+{
+	__invalidate_dcache_all();
+}
+
+void __invalidate_dcache_user_range(struct vm_area_struct *vma,
+				struct page *page, unsigned long adr,
+				int len)
+{
+	__invalidate_dcache_all();
+}
diff --git a/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c b/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c
new file mode 100644
index 00000000000..153f57c57b6
--- /dev/null
+++ b/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c
@@ -0,0 +1,106 @@
+/*
+ * Support for MicroBlaze PVR (processor version register)
+ *
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/string.h>
+#include <asm/pvr.h>
+#include <asm/cpuinfo.h>
+
+/*
+ * Helper macro to map between fields in our struct cpuinfo, and
+ * the PVR macros in pvr.h.
+ */
+
+#define CI(c, p) { ci->c = PVR_##p(pvr); }
+#define err_printk(x) \
+	early_printk("ERROR: Microblaze " x " - different for PVR and DTS\n");
+
+void set_cpuinfo_pvr_full(struct cpuinfo *ci, struct device_node *cpu)
+{
+	struct pvr_s pvr;
+	int temp; /* for saving temp value */
+	get_pvr(&pvr);
+
+	CI(ver_code, VERSION);
+	if (!ci->ver_code) {
+		printk(KERN_ERR "ERROR: MB has broken PVR regs "
+						"-> use DTS setting\n");
+		return;
+	}
+
+	temp = PVR_USE_BARREL(pvr) | PVR_USE_MSR_INSTR(pvr) |\
+		PVR_USE_PCMP_INSTR(pvr) | PVR_USE_DIV(pvr);
+	if (ci->use_instr != temp)
+		err_printk("BARREL, MSR, PCMP or DIV");
+	ci->use_instr = temp;
+
+	temp = PVR_USE_HW_MUL(pvr) | PVR_USE_MUL64(pvr);
+	if (ci->use_mult != temp)
+		err_printk("HW_MUL");
+	ci->use_mult = temp;
+
+	temp = PVR_USE_FPU(pvr) | PVR_USE_FPU2(pvr);
+	if (ci->use_fpu != temp)
+		err_printk("HW_FPU");
+	ci->use_fpu = temp;
+
+	ci->use_exc = PVR_OPCODE_0x0_ILLEGAL(pvr) |\
+			PVR_UNALIGNED_EXCEPTION(pvr) |\
+			PVR_ILL_OPCODE_EXCEPTION(pvr) |\
+			PVR_IOPB_BUS_EXCEPTION(pvr) |\
+			PVR_DOPB_BUS_EXCEPTION(pvr) |\
+			PVR_DIV_ZERO_EXCEPTION(pvr) |\
+			PVR_FPU_EXCEPTION(pvr) |\
+			PVR_FSL_EXCEPTION(pvr);
+
+	CI(pvr_user1, USER1);
+	CI(pvr_user2, USER2);
+
+	CI(mmu, USE_MMU);
+
+	CI(use_icache, USE_ICACHE);
+	CI(icache_tagbits, ICACHE_ADDR_TAG_BITS);
+	CI(icache_write, ICACHE_ALLOW_WR);
+	CI(icache_line, ICACHE_LINE_LEN);
+	CI(icache_size, ICACHE_BYTE_SIZE);
+	CI(icache_base, ICACHE_BASEADDR);
+	CI(icache_high, ICACHE_HIGHADDR);
+
+	CI(use_dcache, USE_DCACHE);
+	CI(dcache_tagbits, DCACHE_ADDR_TAG_BITS);
+	CI(dcache_write, DCACHE_ALLOW_WR);
+	CI(dcache_line, DCACHE_LINE_LEN);
+	CI(dcache_size, DCACHE_BYTE_SIZE);
+	CI(dcache_base, DCACHE_BASEADDR);
+	CI(dcache_high, DCACHE_HIGHADDR);
+
+	CI(use_dopb, D_OPB);
+	CI(use_iopb, I_OPB);
+	CI(use_dlmb, D_LMB);
+	CI(use_ilmb, I_LMB);
+	CI(num_fsl, FSL_LINKS);
+
+	CI(irq_edge, INTERRUPT_IS_EDGE);
+	CI(irq_positive, EDGE_IS_POSITIVE);
+
+	CI(area_optimised, AREA_OPTIMISED);
+
+	CI(hw_debug, DEBUG_ENABLED);
+	CI(num_pc_brk, NUMBER_OF_PC_BRK);
+	CI(num_rd_brk, NUMBER_OF_RD_ADDR_BRK);
+	CI(num_wr_brk, NUMBER_OF_WR_ADDR_BRK);
+
+	CI(fpga_family_code, TARGET_FAMILY);
+
+	/* take timebase-frequency from DTS */
+	ci->cpu_clock_freq = fcpu(cpu, "timebase-frequency");
+}
diff --git a/arch/microblaze/kernel/cpu/cpuinfo-static.c b/arch/microblaze/kernel/cpu/cpuinfo-static.c
new file mode 100644
index 00000000000..cfe44effdb7
--- /dev/null
+++ b/arch/microblaze/kernel/cpu/cpuinfo-static.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <asm/cpuinfo.h>
+#include <asm/pvr.h>
+
+const static char family_string[] = CONFIG_XILINX_MICROBLAZE0_FAMILY;
+const static char cpu_ver_string[] = CONFIG_XILINX_MICROBLAZE0_HW_VER;
+
+#define err_printk(x) \
+	early_printk("ERROR: Microblaze " x "- different for kernel and DTS\n");
+
+void __init set_cpuinfo_static(struct cpuinfo *ci, struct device_node *cpu)
+{
+	int i = 0;
+
+	ci->use_instr =
+		(fcpu(cpu, "xlnx,use-barrel") ? PVR0_USE_BARREL_MASK : 0) |
+		(fcpu(cpu, "xlnx,use-msr-instr") ? PVR2_USE_MSR_INSTR : 0) |
+		(fcpu(cpu, "xlnx,use-pcmp-instr") ? PVR2_USE_PCMP_INSTR : 0) |
+		(fcpu(cpu, "xlnx,use-div") ? PVR0_USE_DIV_MASK : 0);
+	if (CONFIG_XILINX_MICROBLAZE0_USE_BARREL)
+		i |= PVR0_USE_BARREL_MASK;
+	if (CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR)
+		i |= PVR2_USE_MSR_INSTR;
+	if (CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR)
+		i |= PVR2_USE_PCMP_INSTR;
+	if (CONFIG_XILINX_MICROBLAZE0_USE_DIV)
+		i |= PVR0_USE_DIV_MASK;
+	if (ci->use_instr != i)
+		err_printk("BARREL, MSR, PCMP or DIV");
+
+	ci->use_mult = fcpu(cpu, "xlnx,use-hw-mul");
+	if (ci->use_mult != CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)
+		err_printk("HW_MUL");
+	ci->use_mult =
+		(ci->use_mult > 1 ?
+				(PVR2_USE_MUL64_MASK | PVR0_USE_HW_MUL_MASK) :
+				(ci->use_mult == 1 ? PVR0_USE_HW_MUL_MASK : 0));
+
+	ci->use_fpu = fcpu(cpu, "xlnx,use-fpu");
+	if (ci->use_fpu != CONFIG_XILINX_MICROBLAZE0_USE_FPU)
+		err_printk("HW_FPU");
+	ci->use_fpu = (ci->use_fpu > 1 ?
+				(PVR2_USE_FPU2_MASK | PVR0_USE_FPU_MASK) :
+				(ci->use_fpu == 1 ? PVR0_USE_FPU_MASK : 0));
+
+	ci->use_exc =
+		(fcpu(cpu, "xlnx,unaligned-exceptions") ?
+				PVR2_UNALIGNED_EXC_MASK : 0) |
+		(fcpu(cpu, "xlnx,ill-opcode-exception") ?
+				PVR2_ILL_OPCODE_EXC_MASK : 0) |
+		(fcpu(cpu, "xlnx,iopb-bus-exception") ?
+				PVR2_IOPB_BUS_EXC_MASK : 0) |
+		(fcpu(cpu, "xlnx,dopb-bus-exception") ?
+				PVR2_DOPB_BUS_EXC_MASK : 0) |
+		(fcpu(cpu, "xlnx,div-zero-exception") ?
+				PVR2_DIV_ZERO_EXC_MASK : 0) |
+		(fcpu(cpu, "xlnx,fpu-exception") ? PVR2_FPU_EXC_MASK : 0) |
+		(fcpu(cpu, "xlnx,fsl-exception") ? PVR2_USE_EXTEND_FSL : 0);
+
+	ci->use_icache = fcpu(cpu, "xlnx,use-icache");
+	ci->icache_tagbits = fcpu(cpu, "xlnx,addr-tag-bits");
+	ci->icache_write = fcpu(cpu, "xlnx,allow-icache-wr");
+	ci->icache_line = fcpu(cpu, "xlnx,icache-line-len") << 2;
+	if (!ci->icache_line) {
+		if (fcpu(cpu, "xlnx,icache-use-fsl"))
+			ci->icache_line = 4 << 2;
+		else
+			ci->icache_line = 1 << 2;
+	}
+	ci->icache_size = fcpu(cpu, "i-cache-size");
+	ci->icache_base = fcpu(cpu, "i-cache-baseaddr");
+	ci->icache_high = fcpu(cpu, "i-cache-highaddr");
+
+	ci->use_dcache = fcpu(cpu, "xlnx,use-dcache");
+	ci->dcache_tagbits = fcpu(cpu, "xlnx,dcache-addr-tag");
+	ci->dcache_write = fcpu(cpu, "xlnx,allow-dcache-wr");
+	ci->dcache_line = fcpu(cpu, "xlnx,dcache-line-len") << 2;
+	if (!ci->dcache_line) {
+		if (fcpu(cpu, "xlnx,dcache-use-fsl"))
+			ci->dcache_line = 4 << 2;
+		else
+			ci->dcache_line = 1 << 2;
+	}
+	ci->dcache_size = fcpu(cpu, "d-cache-size");
+	ci->dcache_base = fcpu(cpu, "d-cache-baseaddr");
+	ci->dcache_high = fcpu(cpu, "d-cache-highaddr");
+
+	ci->use_dopb = fcpu(cpu, "xlnx,d-opb");
+	ci->use_iopb = fcpu(cpu, "xlnx,i-opb");
+	ci->use_dlmb = fcpu(cpu, "xlnx,d-lmb");
+	ci->use_ilmb = fcpu(cpu, "xlnx,i-lmb");
+
+	ci->num_fsl = fcpu(cpu, "xlnx,fsl-links");
+	ci->irq_edge = fcpu(cpu, "xlnx,interrupt-is-edge");
+	ci->irq_positive = fcpu(cpu, "xlnx,edge-is-positive");
+	ci->area_optimised = 0;
+
+	ci->hw_debug = fcpu(cpu, "xlnx,debug-enabled");
+	ci->num_pc_brk = fcpu(cpu, "xlnx,number-of-pc-brk");
+	ci->num_rd_brk = fcpu(cpu, "xlnx,number-of-rd-addr-brk");
+	ci->num_wr_brk = fcpu(cpu, "xlnx,number-of-wr-addr-brk");
+
+	ci->cpu_clock_freq = fcpu(cpu, "timebase-frequency");
+
+	ci->pvr_user1 = fcpu(cpu, "xlnx,pvr-user1");
+	ci->pvr_user2 = fcpu(cpu, "xlnx,pvr-user2");
+
+	ci->mmu = fcpu(cpu, "xlnx,use-mmu");
+
+	ci->ver_code = 0;
+	ci->fpga_family_code = 0;
+
+	/* Do various fixups based on CPU version and FPGA family strings */
+
+	/* Resolved the CPU version code */
+	for (i = 0; cpu_ver_lookup[i].s != NULL; i++) {
+		if (strcmp(cpu_ver_lookup[i].s, cpu_ver_string) == 0)
+			ci->ver_code = cpu_ver_lookup[i].k;
+	}
+
+	/* Resolved the fpga family code */
+	for (i = 0; family_string_lookup[i].s != NULL; i++) {
+		if (strcmp(family_string_lookup[i].s, family_string) == 0)
+			ci->fpga_family_code = family_string_lookup[i].k;
+	}
+
+	/* FIXME - mb3 and spartan2 do not exist in PVR */
+	/* This is mb3 and on a non Spartan2 */
+	if (ci->ver_code == 0x20 && ci->fpga_family_code != 0xf0)
+		/* Hardware Multiplier in use */
+		ci->use_mult = 1;
+}
diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c
new file mode 100644
index 00000000000..a10bea119b9
--- /dev/null
+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <asm/cpuinfo.h>
+#include <asm/pvr.h>
+
+const struct cpu_ver_key cpu_ver_lookup[] = {
+	/* These key value are as per MBV field in PVR0 */
+	{"5.00.a", 0x01},
+	{"5.00.b", 0x02},
+	{"5.00.c", 0x03},
+	{"6.00.a", 0x04},
+	{"6.00.b", 0x06},
+	{"7.00.a", 0x05},
+	{"7.00.b", 0x07},
+	{"7.10.a", 0x08},
+	{"7.10.b", 0x09},
+	{"7.10.c", 0x0a},
+	{"7.10.d", 0x0b},
+	/* FIXME There is no keycode defined in MBV for these versions */
+	{"2.10.a", 0x10},
+	{"3.00.a", 0x20},
+	{"4.00.a", 0x30},
+	{"4.00.b", 0x40},
+	{NULL, 0},
+};
+
+/*
+ * FIXME Not sure if the actual key is defined by Xilinx in the PVR
+ */
+const struct family_string_key family_string_lookup[] = {
+	{"virtex2", 0x4},
+	{"virtex2pro", 0x5},
+	{"spartan3", 0x6},
+	{"virtex4", 0x7},
+	{"virtex5", 0x8},
+	{"spartan3e", 0x9},
+	{"spartan3a", 0xa},
+	{"spartan3an", 0xb},
+	{"spartan3adsp", 0xc},
+	/* FIXME There is no key code defined for spartan2 */
+	{"spartan2", 0xf0},
+	{NULL, 0},
+};
+
+struct cpuinfo cpuinfo;
+
+void __init setup_cpuinfo(void)
+{
+	struct device_node *cpu = NULL;
+
+	cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu");
+	if (!cpu)
+		printk(KERN_ERR "You don't have cpu!!!\n");
+
+	printk(KERN_INFO "%s: initialising\n", __func__);
+
+	switch (cpu_has_pvr()) {
+	case 0:
+		printk(KERN_WARNING
+			"%s: No PVR support. Using static CPU info from FDT\n",
+			__func__);
+		set_cpuinfo_static(&cpuinfo, cpu);
+		break;
+/* FIXME I found weird behavior with MB 7.00.a/b 7.10.a
+ * please do not use FULL PVR with MMU */
+	case 1:
+		printk(KERN_INFO "%s: Using full CPU PVR support\n",
+			__func__);
+		set_cpuinfo_static(&cpuinfo, cpu);
+		set_cpuinfo_pvr_full(&cpuinfo, cpu);
+		break;
+	default:
+		printk(KERN_WARNING "%s: Unsupported PVR setting\n", __func__);
+		set_cpuinfo_static(&cpuinfo, cpu);
+	}
+}
diff --git a/arch/microblaze/kernel/cpu/mb.c b/arch/microblaze/kernel/cpu/mb.c
new file mode 100644
index 00000000000..4dcfccdbc36
--- /dev/null
+++ b/arch/microblaze/kernel/cpu/mb.c
@@ -0,0 +1,148 @@
+/*
+ * CPU-version specific code
+ *
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2006-2009 PetaLogix
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/seq_file.h>
+#include <linux/cpu.h>
+#include <linux/initrd.h>
+
+#include <linux/bug.h>
+#include <asm/cpuinfo.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <asm/page.h>
+#include <linux/param.h>
+#include <asm/pvr.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+	int count = 0;
+	char *fpga_family = "Unknown";
+	char *cpu_ver = "Unknown";
+	int i;
+
+	/* Denormalised to get the fpga family string */
+	for (i = 0; family_string_lookup[i].s != NULL; i++) {
+		if (cpuinfo.fpga_family_code == family_string_lookup[i].k) {
+			fpga_family = (char *)family_string_lookup[i].s;
+			break;
+		}
+	}
+
+	/* Denormalised to get the hw version string */
+	for (i = 0; cpu_ver_lookup[i].s != NULL; i++) {
+		if (cpuinfo.ver_code == cpu_ver_lookup[i].k) {
+			cpu_ver = (char *)cpu_ver_lookup[i].s;
+			break;
+		}
+	}
+
+	count = seq_printf(m,
+			"CPU-Family:	MicroBlaze\n"
+			"FPGA-Arch:	%s\n"
+			"CPU-Ver:	%s\n"
+			"CPU-MHz:	%d.%02d\n"
+			"BogoMips:	%lu.%02lu\n",
+			fpga_family,
+			cpu_ver,
+			cpuinfo.cpu_clock_freq /
+			1000000,
+			cpuinfo.cpu_clock_freq %
+			1000000,
+			loops_per_jiffy / (500000 / HZ),
+			(loops_per_jiffy / (5000 / HZ)) % 100);
+
+	count += seq_printf(m,
+		"HW:\n Shift:\t\t%s\n"
+		" MSR:\t\t%s\n"
+		" PCMP:\t\t%s\n"
+		" DIV:\t\t%s\n",
+		(cpuinfo.use_instr & PVR0_USE_BARREL_MASK) ? "yes" : "no",
+		(cpuinfo.use_instr & PVR2_USE_MSR_INSTR) ? "yes" : "no",
+		(cpuinfo.use_instr & PVR2_USE_PCMP_INSTR) ? "yes" : "no",
+		(cpuinfo.use_instr & PVR0_USE_DIV_MASK) ? "yes" : "no");
+
+	count += seq_printf(m,
+			" MMU:\t\t%x\n",
+			cpuinfo.mmu);
+
+	count += seq_printf(m,
+		" MUL:\t\t%s\n"
+		" FPU:\t\t%s\n",
+		(cpuinfo.use_mult & PVR2_USE_MUL64_MASK) ? "v2" :
+			(cpuinfo.use_mult & PVR0_USE_HW_MUL_MASK) ? "v1" : "no",
+		(cpuinfo.use_fpu & PVR2_USE_FPU2_MASK) ? "v2" :
+			(cpuinfo.use_fpu & PVR0_USE_FPU_MASK) ? "v1" : "no");
+
+	count += seq_printf(m,
+		" Exc:\t\t%s%s%s%s%s%s%s%s\n",
+		(cpuinfo.use_exc & PVR2_OPCODE_0x0_ILL_MASK) ? "op0x0 " : "",
+		(cpuinfo.use_exc & PVR2_UNALIGNED_EXC_MASK) ? "unal " : "",
+		(cpuinfo.use_exc & PVR2_ILL_OPCODE_EXC_MASK) ? "ill " : "",
+		(cpuinfo.use_exc & PVR2_IOPB_BUS_EXC_MASK) ? "iopb " : "",
+		(cpuinfo.use_exc & PVR2_DOPB_BUS_EXC_MASK) ? "dopb " : "",
+		(cpuinfo.use_exc & PVR2_DIV_ZERO_EXC_MASK) ? "zero " : "",
+		(cpuinfo.use_exc & PVR2_FPU_EXC_MASK) ? "fpu " : "",
+		(cpuinfo.use_exc & PVR2_USE_FSL_EXC) ? "fsl " : "");
+
+	if (cpuinfo.use_icache)
+		count += seq_printf(m,
+				"Icache:\t\t%ukB\n",
+				cpuinfo.icache_size >> 10);
+	else
+		count += seq_printf(m, "Icache:\t\tno\n");
+
+	if (cpuinfo.use_dcache)
+		count += seq_printf(m,
+				"Dcache:\t\t%ukB\n",
+				cpuinfo.dcache_size >> 10);
+	else
+		count += seq_printf(m, "Dcache:\t\tno\n");
+
+	count += seq_printf(m,
+			"HW-Debug:\t%s\n",
+			cpuinfo.hw_debug ? "yes" : "no");
+
+	count += seq_printf(m,
+			"PVR-USR1:\t%02x\n"
+			"PVR-USR2:\t%08x\n",
+			cpuinfo.pvr_user1,
+			cpuinfo.pvr_user2);
+
+	return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	int i = *pos;
+
+	return i < NR_CPUS ? (void *) (i + 1) : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	++*pos;
+	return c_start(m, pos);
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+const struct seq_operations cpuinfo_op = {
+	.start = c_start,
+	.next = c_next,
+	.stop = c_stop,
+	.show = show_cpuinfo,
+};
diff --git a/arch/microblaze/kernel/cpu/pvr.c b/arch/microblaze/kernel/cpu/pvr.c
new file mode 100644
index 00000000000..c9a4340ddd5
--- /dev/null
+++ b/arch/microblaze/kernel/cpu/pvr.c
@@ -0,0 +1,81 @@
+/*
+ * Support for MicroBlaze PVR (processor version register)
+ *
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/compiler.h>
+#include <asm/system.h>
+#include <asm/exceptions.h>
+#include <asm/pvr.h>
+
+/*
+ * Until we get an assembler that knows about the pvr registers,
+ * this horrible cruft will have to do.
+ * That hardcoded opcode is mfs r3, rpvrNN
+ */
+
+#define get_single_pvr(pvrid, val)				\
+{								\
+	register unsigned tmp __asm__("r3");			\
+	tmp = 0x0;	/* Prevent warning about unused */	\
+	__asm__ __volatile__ (					\
+			".byte 0x94,0x60,0xa0, " #pvrid "\n\t"	\
+			: "=r" (tmp) : : "memory"); 		\
+	val = tmp;						\
+}
+
+/*
+ * Does the CPU support the PVR register?
+ * return value:
+ * 0: no PVR
+ * 1: simple PVR
+ * 2: full PVR
+ *
+ * This must work on all CPU versions, including those before the
+ * PVR was even an option.
+ */
+
+int cpu_has_pvr(void)
+{
+	unsigned flags;
+	unsigned pvr0;
+
+	local_save_flags(flags);
+
+	/* PVR bit in MSR tells us if there is any support */
+	if (!(flags & PVR_MSR_BIT))
+		return 0;
+
+	get_single_pvr(0x00, pvr0);
+	pr_debug("%s: pvr0 is 0x%08x\n", __func__, pvr0);
+
+	if (pvr0 & PVR0_PVR_FULL_MASK)
+		return 1;
+
+	/* for partial PVR use static cpuinfo */
+	return 2;
+}
+
+void get_pvr(struct pvr_s *p)
+{
+	get_single_pvr(0, p->pvr[0]);
+	get_single_pvr(1, p->pvr[1]);
+	get_single_pvr(2, p->pvr[2]);
+	get_single_pvr(3, p->pvr[3]);
+	get_single_pvr(4, p->pvr[4]);
+	get_single_pvr(5, p->pvr[5]);
+	get_single_pvr(6, p->pvr[6]);
+	get_single_pvr(7, p->pvr[7]);
+	get_single_pvr(8, p->pvr[8]);
+	get_single_pvr(9, p->pvr[9]);
+	get_single_pvr(10, p->pvr[10]);
+	get_single_pvr(11, p->pvr[11]);
+}
diff --git a/arch/microblaze/kernel/early_printk.c b/arch/microblaze/kernel/early_printk.c
new file mode 100644
index 00000000000..4b0f0fdb9ca
--- /dev/null
+++ b/arch/microblaze/kernel/early_printk.c
@@ -0,0 +1,107 @@
+/*
+ * Early printk support for Microblaze.
+ *
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2003-2006 Yasushi SHOJI <yashi@atmark-techno.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/console.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/tty.h>
+#include <linux/io.h>
+#include <asm/processor.h>
+#include <linux/fcntl.h>
+#include <asm/setup.h>
+#include <asm/prom.h>
+
+static u32 early_console_initialized;
+static u32 base_addr;
+
+static void early_printk_putc(char c)
+{
+	/*
+	 * Limit how many times we'll spin waiting for TX FIFO status.
+	 * This will prevent lockups if the base address is incorrectly
+	 * set, or any other issue on the UARTLITE.
+	 * This limit is pretty arbitrary, unless we are at about 10 baud
+	 * we'll never timeout on a working UART.
+	 */
+
+	unsigned retries = 10000;
+	/* read status bit - 0x8 offset */
+	while (--retries && (in_be32(base_addr + 8) & (1 << 3)))
+		;
+
+	/* Only attempt the iowrite if we didn't timeout */
+	/* write to TX_FIFO - 0x4 offset */
+	if (retries)
+		out_be32(base_addr + 4, c & 0xff);
+}
+
+static void early_printk_write(struct console *unused,
+					const char *s, unsigned n)
+{
+	while (*s && n-- > 0) {
+		early_printk_putc(*s);
+		if (*s == '\n')
+			early_printk_putc('\r');
+		s++;
+	}
+}
+
+static struct console early_serial_console = {
+	.name = "earlyser",
+	.write = early_printk_write,
+	.flags = CON_PRINTBUFFER,
+	.index = -1,
+};
+
+static struct console *early_console = &early_serial_console;
+
+void early_printk(const char *fmt, ...)
+{
+	char buf[512];
+	int n;
+	va_list ap;
+
+	if (early_console_initialized) {
+		va_start(ap, fmt);
+		n = vscnprintf(buf, 512, fmt, ap);
+		early_console->write(early_console, buf, n);
+		va_end(ap);
+	}
+}
+
+int __init setup_early_printk(char *opt)
+{
+	if (early_console_initialized)
+		return 1;
+
+	base_addr = early_uartlite_console();
+	if (base_addr) {
+		early_console_initialized = 1;
+		early_printk("early_printk_console is enabled at 0x%08x\n",
+							base_addr);
+
+		/* register_console(early_console); */
+
+		return 0;
+	} else
+		return 1;
+}
+
+void __init disable_early_printk(void)
+{
+	if (!early_console_initialized || !early_console)
+		return;
+	printk(KERN_WARNING "disabling early console\n");
+	unregister_console(early_console);
+	early_console_initialized = 0;
+}
diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S
new file mode 100644
index 00000000000..f24b1268baa
--- /dev/null
+++ b/arch/microblaze/kernel/entry-nommu.S
@@ -0,0 +1,596 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/errno.h>
+#include <asm/entry.h>
+#include <asm/asm-offsets.h>
+#include <asm/registers.h>
+#include <asm/unistd.h>
+#include <asm/percpu.h>
+#include <asm/signal.h>
+
+#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
+	.macro	disable_irq
+	msrclr r0, MSR_IE
+	.endm
+
+	.macro	enable_irq
+	msrset r0, MSR_IE
+	.endm
+
+	.macro	clear_bip
+	msrclr r0, MSR_BIP
+	.endm
+#else
+	.macro	disable_irq
+	mfs r11, rmsr
+	andi r11, r11, ~MSR_IE
+	mts rmsr, r11
+	.endm
+
+	.macro	enable_irq
+	mfs r11, rmsr
+	ori r11, r11, MSR_IE
+	mts rmsr, r11
+	.endm
+
+	.macro	clear_bip
+	mfs r11, rmsr
+	andi r11, r11, ~MSR_BIP
+	mts rmsr, r11
+	.endm
+#endif
+
+ENTRY(_interrupt)
+	swi	r1, r0, PER_CPU(ENTRY_SP)	/* save the current sp */
+	swi	r11, r0, PER_CPU(R11_SAVE)	/* temporarily save r11 */
+	lwi	r11, r0, PER_CPU(KM)		/* load mode indicator */
+	beqid	r11, 1f
+	nop
+	brid	2f				/* jump over */
+	addik	r1, r1, (-PT_SIZE)	/* room for pt_regs (delay slot) */
+1:						/* switch to kernel stack */
+	lwi	r1, r0, PER_CPU(CURRENT_SAVE)	/* get the saved current */
+	lwi	r1, r1, TS_THREAD_INFO		/* get the thread info */
+	/* calculate kernel stack pointer */
+	addik	r1, r1, THREAD_SIZE - PT_SIZE
+2:
+	swi	r11, r1, PT_MODE		/* store the mode */
+	lwi	r11, r0, PER_CPU(R11_SAVE)	/* reload r11 */
+	swi	r2, r1, PT_R2
+	swi	r3, r1, PT_R3
+	swi	r4, r1, PT_R4
+	swi	r5, r1, PT_R5
+	swi	r6, r1, PT_R6
+	swi	r7, r1, PT_R7
+	swi	r8, r1, PT_R8
+	swi	r9, r1, PT_R9
+	swi	r10, r1, PT_R10
+	swi	r11, r1, PT_R11
+	swi	r12, r1, PT_R12
+	swi	r13, r1, PT_R13
+	swi	r14, r1, PT_R14
+	swi	r14, r1, PT_PC
+	swi	r15, r1, PT_R15
+	swi	r16, r1, PT_R16
+	swi	r17, r1, PT_R17
+	swi	r18, r1, PT_R18
+	swi	r19, r1, PT_R19
+	swi	r20, r1, PT_R20
+	swi	r21, r1, PT_R21
+	swi	r22, r1, PT_R22
+	swi	r23, r1, PT_R23
+	swi	r24, r1, PT_R24
+	swi	r25, r1, PT_R25
+	swi	r26, r1, PT_R26
+	swi	r27, r1, PT_R27
+	swi	r28, r1, PT_R28
+	swi	r29, r1, PT_R29
+	swi	r30, r1, PT_R30
+	swi	r31, r1, PT_R31
+	/* special purpose registers */
+	mfs	r11, rmsr
+	swi	r11, r1, PT_MSR
+	mfs	r11, rear
+	swi	r11, r1, PT_EAR
+	mfs	r11, resr
+	swi	r11, r1, PT_ESR
+	mfs	r11, rfsr
+	swi	r11, r1, PT_FSR
+	/* reload original stack pointer and save it */
+	lwi	r11, r0, PER_CPU(ENTRY_SP)
+	swi	r11, r1, PT_R1
+	/* update mode indicator we are in kernel mode */
+	addik	r11, r0, 1
+	swi	r11, r0, PER_CPU(KM)
+	/* restore r31 */
+	lwi	r31, r0, PER_CPU(CURRENT_SAVE)
+	/* prepare the link register, the argument and jump */
+	la	r15, r0, ret_from_intr - 8
+	addk	r6, r0, r15
+	braid	do_IRQ
+	add	r5, r0, r1
+
+ret_from_intr:
+	lwi	r11, r1, PT_MODE
+	bneid	r11, 3f
+
+	lwi	r6, r31, TS_THREAD_INFO	/* get thread info */
+	lwi	r19, r6, TI_FLAGS	/* get flags in thread info */
+				/* do an extra work if any bits are set */
+
+	andi	r11, r19, _TIF_NEED_RESCHED
+	beqi	r11, 1f
+	bralid	r15, schedule
+	nop
+1:	andi	r11, r19, _TIF_SIGPENDING
+	beqid	r11, no_intr_reshed
+	addk	r5, r1, r0
+	addk	r7, r0, r0
+	bralid	r15, do_signal
+	addk	r6, r0, r0
+
+no_intr_reshed:
+	/* save mode indicator */
+	lwi	r11, r1, PT_MODE
+3:
+	swi	r11, r0, PER_CPU(KM)
+
+	/* save r31 */
+	swi	r31, r0, PER_CPU(CURRENT_SAVE)
+restore_context:
+	/* special purpose registers */
+	lwi	r11, r1, PT_FSR
+	mts	rfsr, r11
+	lwi	r11, r1, PT_ESR
+	mts	resr, r11
+	lwi	r11, r1, PT_EAR
+	mts	rear, r11
+	lwi	r11, r1, PT_MSR
+	mts	rmsr, r11
+
+	lwi	r31, r1, PT_R31
+	lwi	r30, r1, PT_R30
+	lwi	r29, r1, PT_R29
+	lwi	r28, r1, PT_R28
+	lwi	r27, r1, PT_R27
+	lwi	r26, r1, PT_R26
+	lwi	r25, r1, PT_R25
+	lwi	r24, r1, PT_R24
+	lwi	r23, r1, PT_R23
+	lwi	r22, r1, PT_R22
+	lwi	r21, r1, PT_R21
+	lwi	r20, r1, PT_R20
+	lwi	r19, r1, PT_R19
+	lwi	r18, r1, PT_R18
+	lwi	r17, r1, PT_R17
+	lwi	r16, r1, PT_R16
+	lwi	r15, r1, PT_R15
+	lwi	r14, r1, PT_PC
+	lwi	r13, r1, PT_R13
+	lwi	r12, r1, PT_R12
+	lwi	r11, r1, PT_R11
+	lwi	r10, r1, PT_R10
+	lwi	r9, r1, PT_R9
+	lwi	r8, r1, PT_R8
+	lwi	r7, r1, PT_R7
+	lwi	r6, r1, PT_R6
+	lwi	r5, r1, PT_R5
+	lwi	r4, r1, PT_R4
+	lwi	r3, r1, PT_R3
+	lwi	r2, r1, PT_R2
+	lwi	r1, r1, PT_R1
+	rtid	r14, 0
+	nop
+
+ENTRY(_reset)
+	brai	0;
+
+ENTRY(_user_exception)
+	swi	r1, r0, PER_CPU(ENTRY_SP)	/* save the current sp */
+	swi	r11, r0, PER_CPU(R11_SAVE)	/* temporarily save r11 */
+	lwi	r11, r0, PER_CPU(KM)		/* load mode indicator */
+	beqid	r11, 1f				/* Already in kernel mode? */
+	nop
+	brid	2f				/* jump over */
+	addik	r1, r1, (-PT_SIZE)	/* Room for pt_regs (delay slot) */
+1:						/* Switch to kernel stack */
+	lwi	r1, r0, PER_CPU(CURRENT_SAVE)	/* get the saved current */
+	lwi	r1, r1, TS_THREAD_INFO		/* get the thread info */
+	/* calculate kernel stack pointer */
+	addik	r1, r1, THREAD_SIZE - PT_SIZE
+	swi	r11, r0, PER_CPU(R11_SAVE)	/* temporarily save r11 */
+	lwi	r11, r0, PER_CPU(KM)		/* load mode indicator */
+2:
+	swi	r11, r1, PT_MODE		/* store the mode */
+	lwi	r11, r0, PER_CPU(R11_SAVE)	/* reload r11 */
+	/* save them on stack */
+	swi	r2, r1, PT_R2
+	swi	r3, r1, PT_R3 /* r3: _always_ in clobber list; see unistd.h */
+	swi	r4, r1, PT_R4 /* r4: _always_ in clobber list; see unistd.h */
+	swi	r5, r1, PT_R5
+	swi	r6, r1, PT_R6
+	swi	r7, r1, PT_R7
+	swi	r8, r1, PT_R8
+	swi	r9, r1, PT_R9
+	swi	r10, r1, PT_R10
+	swi	r11, r1, PT_R11
+	/* r12: _always_ in clobber list; see unistd.h */
+	swi	r12, r1, PT_R12
+	swi	r13, r1, PT_R13
+	/* r14: _always_ in clobber list; see unistd.h */
+	swi	r14, r1, PT_R14
+	/* but we want to return to the next inst. */
+	addik	r14, r14, 0x4
+	swi	r14, r1, PT_PC		/* increment by 4 and store in pc */
+	swi	r15, r1, PT_R15
+	swi	r16, r1, PT_R16
+	swi	r17, r1, PT_R17
+	swi	r18, r1, PT_R18
+	swi	r19, r1, PT_R19
+	swi	r20, r1, PT_R20
+	swi	r21, r1, PT_R21
+	swi	r22, r1, PT_R22
+	swi	r23, r1, PT_R23
+	swi	r24, r1, PT_R24
+	swi	r25, r1, PT_R25
+	swi	r26, r1, PT_R26
+	swi	r27, r1, PT_R27
+	swi	r28, r1, PT_R28
+	swi	r29, r1, PT_R29
+	swi	r30, r1, PT_R30
+	swi	r31, r1, PT_R31
+
+	disable_irq
+	nop		/* make sure IE bit is in effect */
+	clear_bip	/* once IE is in effect it is safe to clear BIP */
+	nop
+
+	/* special purpose registers */
+	mfs	r11, rmsr
+	swi	r11, r1, PT_MSR
+	mfs	r11, rear
+	swi	r11, r1, PT_EAR
+	mfs	r11, resr
+	swi	r11, r1, PT_ESR
+	mfs	r11, rfsr
+	swi	r11, r1, PT_FSR
+	/* reload original stack pointer and save it */
+	lwi	r11, r0, PER_CPU(ENTRY_SP)
+	swi	r11, r1, PT_R1
+	/* update mode indicator we are in kernel mode */
+	addik	r11, r0, 1
+	swi	r11, r0, PER_CPU(KM)
+	/* restore r31 */
+	lwi	r31, r0, PER_CPU(CURRENT_SAVE)
+	/* re-enable interrupts now we are in kernel mode */
+	enable_irq
+
+	/* See if the system call number is valid. */
+	addi	r11, r12, -__NR_syscalls
+	bgei	r11, 1f			/* return to user if not valid */
+	/* Figure out which function to use for this system call. */
+	/* Note Microblaze barrel shift is optional, so don't rely on it */
+	add	r12, r12, r12			/* convert num -> ptr */
+	add	r12, r12, r12
+	lwi	r12, r12, sys_call_table	/* Get function pointer */
+	la	r15, r0, ret_to_user-8		/* set return address */
+	bra	r12				/* Make the system call. */
+	bri	0				/* won't reach here */
+1:
+	brid	ret_to_user			/* jump to syscall epilogue */
+	addi	r3, r0, -ENOSYS			/* set errno in delay slot */
+
+/*
+ * Debug traps are like a system call, but entered via brki r14, 0x60
+ * All we need to do is send the SIGTRAP signal to current, ptrace and do_signal
+ * will handle the rest
+ */
+ENTRY(_debug_exception)
+	swi	r1, r0, PER_CPU(ENTRY_SP)	/* save the current sp */
+	lwi	r1, r0, PER_CPU(CURRENT_SAVE)	/* get the saved current */
+	lwi	r1, r1, TS_THREAD_INFO		/* get the thread info */
+	addik	r1, r1, THREAD_SIZE - PT_SIZE	/* get the kernel stack */
+	swi	r11, r0, PER_CPU(R11_SAVE)	/* temporarily save r11 */
+	lwi	r11, r0, PER_CPU(KM)		/* load mode indicator */
+//save_context:
+	swi	r11, r1, PT_MODE	/* store the mode */
+	lwi	r11, r0, PER_CPU(R11_SAVE)	/* reload r11 */
+	/* save them on stack */
+	swi	r2, r1, PT_R2
+	swi	r3, r1, PT_R3 /* r3: _always_ in clobber list; see unistd.h */
+	swi	r4, r1, PT_R4 /* r4: _always_ in clobber list; see unistd.h */
+	swi	r5, r1, PT_R5
+	swi	r6, r1, PT_R6
+	swi	r7, r1, PT_R7
+	swi	r8, r1, PT_R8
+	swi	r9, r1, PT_R9
+	swi	r10, r1, PT_R10
+	swi	r11, r1, PT_R11
+	/* r12: _always_ in clobber list; see unistd.h */
+	swi	r12, r1, PT_R12
+	swi	r13, r1, PT_R13
+	/* r14: _always_ in clobber list; see unistd.h */
+	swi	r14, r1, PT_R14
+	swi	r14, r1, PT_PC /* Will return to interrupted instruction */
+	swi	r15, r1, PT_R15
+	swi	r16, r1, PT_R16
+	swi	r17, r1, PT_R17
+	swi	r18, r1, PT_R18
+	swi	r19, r1, PT_R19
+	swi	r20, r1, PT_R20
+	swi	r21, r1, PT_R21
+	swi	r22, r1, PT_R22
+	swi	r23, r1, PT_R23
+	swi	r24, r1, PT_R24
+	swi	r25, r1, PT_R25
+	swi	r26, r1, PT_R26
+	swi	r27, r1, PT_R27
+	swi	r28, r1, PT_R28
+	swi	r29, r1, PT_R29
+	swi	r30, r1, PT_R30
+	swi	r31, r1, PT_R31
+
+	disable_irq
+	nop		/* make sure IE bit is in effect */
+	clear_bip	/* once IE is in effect it is safe to clear BIP */
+	nop
+
+	/* special purpose registers */
+	mfs	r11, rmsr
+	swi	r11, r1, PT_MSR
+	mfs	r11, rear
+	swi	r11, r1, PT_EAR
+	mfs	r11, resr
+	swi	r11, r1, PT_ESR
+	mfs	r11, rfsr
+	swi	r11, r1, PT_FSR
+	/* reload original stack pointer and save it */
+	lwi	r11, r0, PER_CPU(ENTRY_SP)
+	swi	r11, r1, PT_R1
+	/* update mode indicator we are in kernel mode */
+	addik	r11, r0, 1
+	swi	r11, r0, PER_CPU(KM)
+	/* restore r31 */
+	lwi	r31, r0, PER_CPU(CURRENT_SAVE)
+	/* re-enable interrupts now we are in kernel mode */
+	enable_irq
+
+	addi	r5, r0, SIGTRAP			/* sending the trap signal */
+	add	r6, r0, r31			/* to current */
+	bralid	r15, send_sig
+	add	r7, r0, r0			/* 3rd param zero */
+
+	/* Restore r3/r4 to work around how ret_to_user works */
+	lwi	r3, r1, PT_R3
+	lwi	r4, r1, PT_R4
+	bri	ret_to_user
+
+ENTRY(_break)
+	bri	0
+
+/* struct task_struct *_switch_to(struct thread_info *prev,
+					struct thread_info *next); */
+ENTRY(_switch_to)
+	/* prepare return value */
+	addk	r3, r0, r31
+
+	/* save registers in cpu_context */
+	/* use r11 and r12, volatile registers, as temp register */
+	addik	r11, r5, TI_CPU_CONTEXT
+	swi	r1, r11, CC_R1
+	swi	r2, r11, CC_R2
+	/* skip volatile registers.
+	 * they are saved on stack when we jumped to _switch_to() */
+	/* dedicated registers */
+	swi	r13, r11, CC_R13
+	swi	r14, r11, CC_R14
+	swi	r15, r11, CC_R15
+	swi	r16, r11, CC_R16
+	swi	r17, r11, CC_R17
+	swi	r18, r11, CC_R18
+	/* save non-volatile registers */
+	swi	r19, r11, CC_R19
+	swi	r20, r11, CC_R20
+	swi	r21, r11, CC_R21
+	swi	r22, r11, CC_R22
+	swi	r23, r11, CC_R23
+	swi	r24, r11, CC_R24
+	swi	r25, r11, CC_R25
+	swi	r26, r11, CC_R26
+	swi	r27, r11, CC_R27
+	swi	r28, r11, CC_R28
+	swi	r29, r11, CC_R29
+	swi	r30, r11, CC_R30
+	/* special purpose registers */
+	mfs	r12, rmsr
+	swi	r12, r11, CC_MSR
+	mfs	r12, rear
+	swi	r12, r11, CC_EAR
+	mfs	r12, resr
+	swi	r12, r11, CC_ESR
+	mfs	r12, rfsr
+	swi	r12, r11, CC_FSR
+
+	/* update r31, the current */
+	lwi	r31, r6, TI_TASK
+	swi	r31, r0, PER_CPU(CURRENT_SAVE)
+
+	/* get new process' cpu context and restore */
+	addik	r11, r6, TI_CPU_CONTEXT
+
+	/* special purpose registers */
+	lwi	r12, r11, CC_FSR
+	mts	rfsr, r12
+	lwi	r12, r11, CC_ESR
+	mts	resr, r12
+	lwi	r12, r11, CC_EAR
+	mts	rear, r12
+	lwi	r12, r11, CC_MSR
+	mts	rmsr, r12
+	/* non-volatile registers */
+	lwi	r30, r11, CC_R30
+	lwi	r29, r11, CC_R29
+	lwi	r28, r11, CC_R28
+	lwi	r27, r11, CC_R27
+	lwi	r26, r11, CC_R26
+	lwi	r25, r11, CC_R25
+	lwi	r24, r11, CC_R24
+	lwi	r23, r11, CC_R23
+	lwi	r22, r11, CC_R22
+	lwi	r21, r11, CC_R21
+	lwi	r20, r11, CC_R20
+	lwi	r19, r11, CC_R19
+	/* dedicated registers */
+	lwi	r18, r11, CC_R18
+	lwi	r17, r11, CC_R17
+	lwi	r16, r11, CC_R16
+	lwi	r15, r11, CC_R15
+	lwi	r14, r11, CC_R14
+	lwi	r13, r11, CC_R13
+	/* skip volatile registers */
+	lwi	r2, r11, CC_R2
+	lwi	r1, r11, CC_R1
+
+	rtsd	r15, 8
+	nop
+
+ENTRY(ret_from_fork)
+	addk	r5, r0, r3
+	addk	r6, r0, r1
+	brlid	r15, schedule_tail
+	nop
+	swi	r31, r1, PT_R31		/* save r31 in user context. */
+			/* will soon be restored to r31 in ret_to_user */
+	addk	r3, r0, r0
+	brid	ret_to_user
+	nop
+
+work_pending:
+	andi	r11, r19, _TIF_NEED_RESCHED
+	beqi	r11, 1f
+	bralid	r15, schedule
+	nop
+1:	andi	r11, r19, _TIF_SIGPENDING
+	beqi	r11, no_work_pending
+	addk	r5, r1, r0
+	addik	r7, r0, 1
+	bralid	r15, do_signal
+	addk	r6, r0, r0
+	bri	no_work_pending
+
+ENTRY(ret_to_user)
+	disable_irq
+
+	swi	r4, r1, PT_R4		/* return val */
+	swi	r3, r1, PT_R3		/* return val */
+
+	lwi	r6, r31, TS_THREAD_INFO /* get thread info */
+	lwi	r19, r6, TI_FLAGS /* get flags in thread info */
+	bnei	r19, work_pending /* do an extra work if any bits are set */
+no_work_pending:
+	disable_irq
+
+	/* save r31 */
+	swi	r31, r0, PER_CPU(CURRENT_SAVE)
+	/* save mode indicator */
+	lwi	r18, r1, PT_MODE
+	swi	r18, r0, PER_CPU(KM)
+//restore_context:
+	/* special purpose registers */
+	lwi	r18, r1, PT_FSR
+	mts	rfsr, r18
+	lwi	r18, r1, PT_ESR
+	mts	resr, r18
+	lwi	r18, r1, PT_EAR
+	mts	rear, r18
+	lwi	r18, r1, PT_MSR
+	mts	rmsr, r18
+
+	lwi	r31, r1, PT_R31
+	lwi	r30, r1, PT_R30
+	lwi	r29, r1, PT_R29
+	lwi	r28, r1, PT_R28
+	lwi	r27, r1, PT_R27
+	lwi	r26, r1, PT_R26
+	lwi	r25, r1, PT_R25
+	lwi	r24, r1, PT_R24
+	lwi	r23, r1, PT_R23
+	lwi	r22, r1, PT_R22
+	lwi	r21, r1, PT_R21
+	lwi	r20, r1, PT_R20
+	lwi	r19, r1, PT_R19
+	lwi	r18, r1, PT_R18
+	lwi	r17, r1, PT_R17
+	lwi	r16, r1, PT_R16
+	lwi	r15, r1, PT_R15
+	lwi	r14, r1, PT_PC
+	lwi	r13, r1, PT_R13
+	lwi	r12, r1, PT_R12
+	lwi	r11, r1, PT_R11
+	lwi	r10, r1, PT_R10
+	lwi	r9, r1, PT_R9
+	lwi	r8, r1, PT_R8
+	lwi	r7, r1, PT_R7
+	lwi	r6, r1, PT_R6
+	lwi	r5, r1, PT_R5
+	lwi	r4, r1, PT_R4		/* return val */
+	lwi	r3, r1, PT_R3		/* return val */
+	lwi	r2, r1, PT_R2
+	lwi	r1, r1, PT_R1
+
+	rtid	r14, 0
+	nop
+
+sys_vfork_wrapper:
+	brid	sys_vfork
+	addk	r5, r1, r0
+
+sys_clone_wrapper:
+	brid	sys_clone
+	addk	r7, r1, r0
+
+sys_execve_wrapper:
+	brid	sys_execve
+	addk	r8, r1, r0
+
+sys_sigreturn_wrapper:
+	brid	sys_sigreturn
+	addk	r5, r1, r0
+
+sys_rt_sigreturn_wrapper:
+	brid	sys_rt_sigreturn
+	addk	r5, r1, r0
+
+sys_sigsuspend_wrapper:
+	brid	sys_rt_sigsuspend
+	addk	r6, r1, r0
+
+sys_rt_sigsuspend_wrapper:
+	brid	sys_rt_sigsuspend
+	addk	r7, r1, r0
+
+	/* Interrupt vector table */
+	.section	.init.ivt, "ax"
+	.org 0x0
+	brai	_reset
+	brai	_user_exception
+	brai	_interrupt
+	brai	_break
+	brai	_hw_exception_handler
+	.org 0x60
+	brai	_debug_exception
+
+.section .rodata,"a"
+#include "syscall_table.S"
+
+syscall_table_size=(.-sys_call_table)
diff --git a/arch/microblaze/kernel/exceptions.c b/arch/microblaze/kernel/exceptions.c
new file mode 100644
index 00000000000..4a8a4064c7e
--- /dev/null
+++ b/arch/microblaze/kernel/exceptions.c
@@ -0,0 +1,124 @@
+/*
+ * HW exception handling
+ *
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008 PetaLogix
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file COPYING in the main directory of this
+ * archive for more details.
+ */
+
+/*
+ * This file handles the architecture-dependent parts of hardware exceptions
+ */
+
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kallsyms.h>
+#include <linux/module.h>
+
+#include <asm/exceptions.h>
+#include <asm/entry.h>		/* For KM CPU var */
+#include <asm/uaccess.h>
+#include <asm/errno.h>
+#include <asm/ptrace.h>
+#include <asm/current.h>
+
+#define MICROBLAZE_ILL_OPCODE_EXCEPTION	0x02
+#define MICROBLAZE_IBUS_EXCEPTION	0x03
+#define MICROBLAZE_DBUS_EXCEPTION	0x04
+#define MICROBLAZE_DIV_ZERO_EXCEPTION	0x05
+#define MICROBLAZE_FPU_EXCEPTION	0x06
+#define MICROBLAZE_PRIVILEG_EXCEPTION	0x07
+
+static DEFINE_SPINLOCK(die_lock);
+
+void die(const char *str, struct pt_regs *fp, long err)
+{
+	console_verbose();
+	spin_lock_irq(&die_lock);
+	printk(KERN_WARNING "Oops: %s, sig: %ld\n", str, err);
+	show_regs(fp);
+	spin_unlock_irq(&die_lock);
+	/* do_exit() should take care of panic'ing from an interrupt
+	 * context so we don't handle it here
+	 */
+	do_exit(err);
+}
+
+void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
+{
+	siginfo_t info;
+
+	if (kernel_mode(regs)) {
+		debugger(regs);
+		die("Exception in kernel mode", regs, signr);
+	}
+	info.si_signo = signr;
+	info.si_errno = 0;
+	info.si_code = code;
+	info.si_addr = (void __user *) addr;
+	force_sig_info(signr, &info, current);
+}
+
+asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
+							int fsr, int addr)
+{
+#if 0
+	printk(KERN_WARNING "Exception %02x in %s mode, FSR=%08x PC=%08x ESR=%08x\n",
+			type, user_mode(regs) ? "user" : "kernel", fsr,
+			(unsigned int) regs->pc, (unsigned int) regs->esr);
+#endif
+
+	switch (type & 0x1F) {
+	case MICROBLAZE_ILL_OPCODE_EXCEPTION:
+		_exception(SIGILL, regs, ILL_ILLOPC, addr);
+		break;
+	case MICROBLAZE_IBUS_EXCEPTION:
+		if (user_mode(regs)) {
+			printk(KERN_WARNING "Instruction bus error exception in user mode.\n");
+			_exception(SIGBUS, regs, BUS_ADRERR, addr);
+			return;
+		}
+		printk(KERN_WARNING "Instruction bus error exception in kernel mode.\n");
+		die("bus exception", regs, SIGBUS);
+		break;
+	case MICROBLAZE_DBUS_EXCEPTION:
+		if (user_mode(regs)) {
+			printk(KERN_WARNING "Data bus error exception in user mode.\n");
+			_exception(SIGBUS, regs, BUS_ADRERR, addr);
+			return;
+		}
+		printk(KERN_WARNING "Data bus error exception in kernel mode.\n");
+		die("bus exception", regs, SIGBUS);
+		break;
+	case MICROBLAZE_DIV_ZERO_EXCEPTION:
+		printk(KERN_WARNING "Divide by zero exception\n");
+		_exception(SIGILL, regs, ILL_ILLOPC, addr);
+		break;
+
+	case MICROBLAZE_FPU_EXCEPTION:
+		/* IEEE FP exception */
+		/* I removed fsr variable and use code var for storing fsr */
+		if (fsr & FSR_IO)
+			fsr = FPE_FLTINV;
+		else if (fsr & FSR_OF)
+			fsr = FPE_FLTOVF;
+		else if (fsr & FSR_UF)
+			fsr = FPE_FLTUND;
+		else if (fsr & FSR_DZ)
+			fsr = FPE_FLTDIV;
+		else if (fsr & FSR_DO)
+			fsr = FPE_FLTRES;
+		_exception(SIGFPE, regs, fsr, addr);
+		break;
+
+	default:
+		printk(KERN_WARNING "Unexpected exception %02x "
+			"PC=%08x in %s mode\n", type, (unsigned int) addr,
+			kernel_mode(regs) ? "kernel" : "user");
+	}
+	return;
+}
diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
new file mode 100644
index 00000000000..319dc35fc92
--- /dev/null
+++ b/arch/microblaze/kernel/head.S
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+
+	.text
+ENTRY(_start)
+	mfs	r1, rmsr
+	andi	r1, r1, ~2
+	mts	rmsr, r1
+
+/* save fdt to kernel location */
+/* r7 stores pointer to fdt blob */
+	beqi	r7, no_fdt_arg
+	or	r11, r0, r0 /* incremment */
+	ori	r4, r0, TOPHYS(_fdt_start) /* save bram context */
+	ori	r3, r0, (0x4000 - 4)
+_copy_fdt:
+	lw	r12, r7, r11 /* r12 = r7 + r11 */
+	sw	r12, r4, r11 /* addr[r4 + r11] = r12 */
+	addik	r11, r11, 4 /* increment counting */
+	bgtid	r3, _copy_fdt /* loop for all entries */
+	addik	r3, r3, -4 /* descrement loop */
+no_fdt_arg:
+
+	/* Initialize small data anchors */
+	la	r13, r0, _KERNEL_SDA_BASE_
+	la	r2, r0, _KERNEL_SDA2_BASE_
+
+	/* Initialize stack pointer */
+	la	r1, r0, init_thread_union + THREAD_SIZE - 4
+
+	/* Initialize r31 with current task address */
+	la	r31, r0, init_task
+
+	/*
+	 * Call platform dependent initialize function.
+	 * Please see $(ARCH)/mach-$(SUBARCH)/setup.c for
+	 * the function.
+	 */
+	la	r8, r0, machine_early_init
+	brald	r15, r8
+	nop
+
+	la	r15, r0, machine_halt
+	braid	start_kernel
+	nop
diff --git a/arch/microblaze/kernel/heartbeat.c b/arch/microblaze/kernel/heartbeat.c
new file mode 100644
index 00000000000..1bdf20222b9
--- /dev/null
+++ b/arch/microblaze/kernel/heartbeat.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/io.h>
+
+#include <asm/setup.h>
+#include <asm/page.h>
+#include <asm/prom.h>
+
+static unsigned int base_addr;
+
+void heartbeat(void)
+{
+	static unsigned int cnt, period, dist;
+
+	if (base_addr) {
+		if (cnt == 0 || cnt == dist)
+			out_be32(base_addr, 1);
+		else if (cnt == 7 || cnt == dist + 7)
+			out_be32(base_addr, 0);
+
+		if (++cnt > period) {
+			cnt = 0;
+			/*
+			 * The hyperbolic function below modifies the heartbeat
+			 * period length in dependency of the current (5min)
+			 * load. It goes through the points f(0)=126, f(1)=86,
+			 * f(5)=51, f(inf)->30.
+			 */
+			period = ((672 << FSHIFT) / (5 * avenrun[0] +
+						(7 << FSHIFT))) + 30;
+			dist = period / 4;
+		}
+	}
+}
+
+void setup_heartbeat(void)
+{
+	struct device_node *gpio = NULL;
+	int j;
+	char *gpio_list[] = {
+				"xlnx,xps-gpio-1.00.a",
+				"xlnx,opb-gpio-1.00.a",
+				NULL
+			};
+
+	for (j = 0; gpio_list[j] != NULL; j++) {
+		gpio = of_find_compatible_node(NULL, NULL, gpio_list[j]);
+		if (gpio)
+			break;
+	}
+
+	base_addr = *(int *) of_get_property(gpio, "reg", NULL);
+	base_addr = (unsigned long) ioremap(base_addr, PAGE_SIZE);
+	printk(KERN_NOTICE "Heartbeat GPIO at 0x%x\n", base_addr);
+
+	if (*(int *) of_get_property(gpio, "xlnx,is-bidir", NULL))
+		out_be32(base_addr + 4, 0); /* GPIO is configured as output */
+}
diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
new file mode 100644
index 00000000000..cf9486d9983
--- /dev/null
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -0,0 +1,458 @@
+/*
+ * Exception handling for Microblaze
+ *
+ * Rewriten interrupt handling
+ *
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ *
+ * uClinux customisation (C) 2005 John Williams
+ *
+ * MMU code derived from arch/ppc/kernel/head_4xx.S:
+ *	Copyright (C) 1995-1996 Gary Thomas <gdt@linuxppc.org>
+ *		Initial PowerPC version.
+ *	Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
+ *		Rewritten for PReP
+ *	Copyright (C) 1996 Paul Mackerras <paulus@cs.anu.edu.au>
+ *		Low-level exception handers, MMU support, and rewrite.
+ *	Copyright (C) 1997 Dan Malek <dmalek@jlc.net>
+ *		PowerPC 8xx modifications.
+ *	Copyright (C) 1998-1999 TiVo, Inc.
+ *		PowerPC 403GCX modifications.
+ *	Copyright (C) 1999 Grant Erickson <grant@lcse.umn.edu>
+ *		PowerPC 403GCX/405GP modifications.
+ *	Copyright 2000 MontaVista Software Inc.
+ *		PPC405 modifications
+ *	PowerPC 403GCX/405GP modifications.
+ *		Author: MontaVista Software, Inc.
+ *		frank_rowand@mvista.com or source@mvista.com
+ *		debbie_chu@mvista.com
+ *
+ * Original code
+ * Copyright (C) 2004 Xilinx, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+/*
+ * Here are the handlers which don't require enabling translation
+ * and calling other kernel code thus we can keep their design very simple
+ * and do all processing in real mode. All what they need is a valid current
+ * (that is an issue for the CONFIG_REGISTER_TASK_PTR case)
+ * This handlers use r3,r4,r5,r6 and optionally r[current] to work therefore
+ * these registers are saved/restored
+ * The handlers which require translation are in entry.S --KAA
+ *
+ * Microblaze HW Exception Handler
+ * - Non self-modifying exception handler for the following exception conditions
+ *   - Unalignment
+ *   - Instruction bus error
+ *   - Data bus error
+ *   - Illegal instruction opcode
+ *   - Divide-by-zero
+ *
+ * Note we disable interrupts during exception handling, otherwise we will
+ * possibly get multiple re-entrancy if interrupt handles themselves cause
+ * exceptions. JW
+ */
+
+#include <asm/exceptions.h>
+#include <asm/unistd.h>
+#include <asm/page.h>
+
+#include <asm/entry.h>
+#include <asm/current.h>
+#include <linux/linkage.h>
+
+#include <asm/mmu.h>
+#include <asm/pgtable.h>
+#include <asm/asm-offsets.h>
+
+/* Helpful Macros */
+#define EX_HANDLER_STACK_SIZ	(4*19)
+#define NUM_TO_REG(num)		r ## num
+
+#define LWREG_NOP			\
+	bri	ex_handler_unhandled;	\
+	nop;
+
+#define SWREG_NOP			\
+	bri	ex_handler_unhandled;	\
+	nop;
+
+/* FIXME this is weird - for noMMU kernel is not possible to use brid
+ * instruction which can shorten executed time
+ */
+
+/* r3 is the source */
+#define R3_TO_LWREG_V(regnum)				\
+	swi	r3, r1, 4 * regnum;				\
+	bri	ex_handler_done;
+
+/* r3 is the source */
+#define R3_TO_LWREG(regnum)				\
+	or	NUM_TO_REG (regnum), r0, r3;		\
+	bri	ex_handler_done;
+
+/* r3 is the target */
+#define SWREG_TO_R3_V(regnum)				\
+	lwi	r3, r1, 4 * regnum;				\
+	bri	ex_sw_tail;
+
+/* r3 is the target */
+#define SWREG_TO_R3(regnum)				\
+	or	r3, r0, NUM_TO_REG (regnum);		\
+	bri	ex_sw_tail;
+
+.extern other_exception_handler /* Defined in exception.c */
+
+/*
+ * hw_exception_handler - Handler for exceptions
+ *
+ * Exception handler notes:
+ * - Handles all exceptions
+ * - Does not handle unaligned exceptions during load into r17, r1, r0.
+ * - Does not handle unaligned exceptions during store from r17 (cannot be
+ *   done) and r1 (slows down common case)
+ *
+ *  Relevant register structures
+ *
+ *  EAR - |----|----|----|----|----|----|----|----|
+ *      - <  ##   32 bit faulting address     ##  >
+ *
+ *  ESR - |----|----|----|----|----| - | - |-----|-----|
+ *      -                            W   S   REG   EXC
+ *
+ *
+ * STACK FRAME STRUCTURE (for NO_MMU)
+ * ---------------------------------
+ *
+ *      +-------------+         + 0
+ *      |     MSR     |
+ *      +-------------+         + 4
+ *      |     r1      |
+ *      |      .      |
+ *      |      .      |
+ *      |      .      |
+ *      |      .      |
+ *      |     r18     |
+ *      +-------------+         + 76
+ *      |      .      |
+ *      |      .      |
+ *
+ * NO_MMU kernel use the same r0_ram pointed space - look to vmlinux.lds.S
+ * which is used for storing register values - old style was, that value were
+ * stored in stack but in case of failure you lost information about register.
+ * Currently you can see register value in memory in specific place.
+ * In compare to with previous solution the speed should be the same.
+ *
+ * MMU exception handler has different handling compare to no MMU kernel.
+ * Exception handler use jump table for directing of what happen. For MMU kernel
+ * is this approach better because MMU relate exception are handled by asm code
+ * in this file. In compare to with MMU expect of unaligned exception
+ * is everything handled by C code.
+ */
+
+/*
+ * every of these handlers is entered having R3/4/5/6/11/current saved on stack
+ * and clobbered so care should be taken to restore them if someone is going to
+ * return from exception
+ */
+
+/* wrappers to restore state before coming to entry.S */
+
+.global _hw_exception_handler
+.section .text
+.align 4
+.ent _hw_exception_handler
+_hw_exception_handler:
+	addik	r1, r1, -(EX_HANDLER_STACK_SIZ); /* Create stack frame */
+	swi	r3, r1, PT_R3
+	swi	r4, r1, PT_R4
+	swi	r5, r1, PT_R5
+	swi	r6, r1, PT_R6
+
+	mfs	r5, rmsr;
+	nop
+	swi	r5, r1, 0;
+	mfs	r4, rbtr	/* Save BTR before jumping to handler */
+	nop
+	mfs	r3, resr
+	nop
+
+	andi	r5, r3, 0x1000;		/* Check ESR[DS] */
+	beqi	r5, not_in_delay_slot;	/* Branch if ESR[DS] not set */
+	mfs	r17, rbtr;	/* ESR[DS] set - return address in BTR */
+	nop
+not_in_delay_slot:
+	swi	r17, r1, PT_R17
+
+	andi	r5, r3, 0x1F;		/* Extract ESR[EXC] */
+
+	/* Exceptions enabled here. This will allow nested exceptions */
+	mfs	r6, rmsr;
+	nop
+	swi	r6, r1, 0; /* RMSR_OFFSET */
+	ori	r6, r6, 0x100; /* Turn ON the EE bit */
+	andi	r6, r6, ~2; /* Disable interrupts */
+	mts	rmsr, r6;
+	nop
+
+	xori	r6, r5, 1; /* 00001 = Unaligned Exception */
+	/* Jump to unalignment exception handler */
+	beqi	r6, handle_unaligned_ex;
+
+handle_other_ex: /* Handle Other exceptions here */
+	/* Save other volatiles before we make procedure calls below */
+	swi	r7, r1, PT_R7
+	swi	r8, r1, PT_R8
+	swi	r9, r1, PT_R9
+	swi	r10, r1, PT_R10
+	swi	r11, r1, PT_R11
+	swi	r12, r1, PT_R12
+	swi	r14, r1, PT_R14
+	swi	r15, r1, PT_R15
+	swi	r18, r1, PT_R18
+
+	or	r5, r1, r0
+	andi	r6, r3, 0x1F; /* Load ESR[EC] */
+	lwi	r7, r0, PER_CPU(KM) /* MS: saving current kernel mode to regs */
+	swi	r7, r1, PT_MODE
+	mfs	r7, rfsr
+	nop
+	addk	r8, r17, r0; /* Load exception address */
+	bralid	r15, full_exception; /* Branch to the handler */
+	nop;
+
+	/*
+	 * Trigger execution of the signal handler by enabling
+	 * interrupts and calling an invalid syscall.
+	 */
+	mfs	r5, rmsr;
+	nop
+	ori	r5, r5, 2;
+	mts	rmsr, r5; /* enable interrupt */
+	nop
+	addi	r12, r0, __NR_syscalls;
+	brki	r14, 0x08;
+	mfs	r5, rmsr; /* disable interrupt */
+	nop
+	andi	r5, r5, ~2;
+	mts	rmsr, r5;
+	nop
+
+	lwi	r7, r1, PT_R7
+	lwi	r8, r1, PT_R8
+	lwi	r9, r1, PT_R9
+	lwi	r10, r1, PT_R10
+	lwi	r11, r1, PT_R11
+	lwi	r12, r1, PT_R12
+	lwi	r14, r1, PT_R14
+	lwi	r15, r1, PT_R15
+	lwi	r18, r1, PT_R18
+
+	bri	ex_handler_done; /* Complete exception handling */
+
+/* 0x01 - Unaligned data access exception
+ * This occurs when a word access is not aligned on a word boundary,
+ * or when a 16-bit access is not aligned on a 16-bit boundary.
+ * This handler perform the access, and returns, except for MMU when
+ * the unaligned address is last on a 4k page or the physical address is
+ * not found in the page table, in which case unaligned_data_trap is called.
+ */
+handle_unaligned_ex:
+	/* Working registers already saved: R3, R4, R5, R6
+	 *  R3 = ESR
+	 *  R4 = BTR
+	 */
+	mfs	r4, rear;
+	nop
+
+	andi	r6, r3, 0x3E0; /* Mask and extract the register operand */
+	srl	r6, r6; /* r6 >> 5 */
+	srl	r6, r6;
+	srl	r6, r6;
+	srl	r6, r6;
+	srl	r6, r6;
+	/* Store the register operand in a temporary location */
+	sbi	r6, r0, TOPHYS(ex_reg_op);
+
+	andi	r6, r3, 0x400; /* Extract ESR[S] */
+	bnei	r6, ex_sw;
+ex_lw:
+	andi	r6, r3, 0x800; /* Extract ESR[W] */
+	beqi	r6, ex_lhw;
+	lbui	r5, r4, 0; /* Exception address in r4 */
+	/* Load a word, byte-by-byte from destination address
+		and save it in tmp space */
+	sbi	r5, r0, TOPHYS(ex_tmp_data_loc_0);
+	lbui	r5, r4, 1;
+	sbi	r5, r0, TOPHYS(ex_tmp_data_loc_1);
+	lbui	r5, r4, 2;
+	sbi	r5, r0, TOPHYS(ex_tmp_data_loc_2);
+	lbui	r5, r4, 3;
+	sbi	r5, r0, TOPHYS(ex_tmp_data_loc_3);
+	/* Get the destination register value into r3 */
+	lwi	r3, r0, TOPHYS(ex_tmp_data_loc_0);
+	bri	ex_lw_tail;
+ex_lhw:
+	lbui	r5, r4, 0; /* Exception address in r4 */
+	/* Load a half-word, byte-by-byte from destination
+		address and save it in tmp space */
+	sbi	r5, r0, TOPHYS(ex_tmp_data_loc_0);
+	lbui	r5, r4, 1;
+	sbi	r5, r0, TOPHYS(ex_tmp_data_loc_1);
+	/* Get the destination register value into r3 */
+	lhui	r3, r0, TOPHYS(ex_tmp_data_loc_0);
+ex_lw_tail:
+	/* Get the destination register number into r5 */
+	lbui	r5, r0, TOPHYS(ex_reg_op);
+	/* Form load_word jump table offset (lw_table + (8 * regnum)) */
+	la	r6, r0, TOPHYS(lw_table);
+	addk	r5, r5, r5;
+	addk	r5, r5, r5;
+	addk	r5, r5, r5;
+	addk	r5, r5, r6;
+	bra	r5;
+ex_lw_end: /* Exception handling of load word, ends */
+ex_sw:
+	/* Get the destination register number into r5 */
+	lbui	r5, r0, TOPHYS(ex_reg_op);
+	/* Form store_word jump table offset (sw_table + (8 * regnum)) */
+	la	r6, r0, TOPHYS(sw_table);
+	add	r5, r5, r5;
+	add	r5, r5, r5;
+	add	r5, r5, r5;
+	add	r5, r5, r6;
+	bra	r5;
+ex_sw_tail:
+	mfs	r6, resr;
+	nop
+	andi	r6, r6, 0x800; /* Extract ESR[W] */
+	beqi	r6, ex_shw;
+	/* Get the word - delay slot */
+	swi	r3, r0, TOPHYS(ex_tmp_data_loc_0);
+	/* Store the word, byte-by-byte into destination address */
+	lbui	r3, r0, TOPHYS(ex_tmp_data_loc_0);
+	sbi	r3, r4, 0;
+	lbui	r3, r0, TOPHYS(ex_tmp_data_loc_1);
+	sbi	r3, r4, 1;
+	lbui	r3, r0, TOPHYS(ex_tmp_data_loc_2);
+	sbi	r3, r4, 2;
+	lbui	r3, r0, TOPHYS(ex_tmp_data_loc_3);
+	sbi	r3, r4, 3;
+	bri	ex_handler_done;
+
+ex_shw:
+	/* Store the lower half-word, byte-by-byte into destination address */
+	swi	r3, r0, TOPHYS(ex_tmp_data_loc_0);
+	lbui	r3, r0, TOPHYS(ex_tmp_data_loc_2);
+	sbi	r3, r4, 0;
+	lbui	r3, r0, TOPHYS(ex_tmp_data_loc_3);
+	sbi	r3, r4, 1;
+ex_sw_end: /* Exception handling of store word, ends. */
+
+ex_handler_done:
+	lwi	r5, r1, 0 /* RMSR */
+	mts	rmsr, r5
+	nop
+	lwi	r3, r1, PT_R3
+	lwi	r4, r1, PT_R4
+	lwi	r5, r1, PT_R5
+	lwi	r6, r1, PT_R6
+	lwi	r17, r1, PT_R17
+
+	rted	r17, 0
+	addik	r1, r1, (EX_HANDLER_STACK_SIZ); /* Restore stack frame */
+
+.end _hw_exception_handler
+
+ex_handler_unhandled:
+/* FIXME add handle function for unhandled exception - dump register */
+	bri 0
+
+.section .text
+.align 4
+lw_table:
+lw_r0:		R3_TO_LWREG	(0);
+lw_r1:		LWREG_NOP;
+lw_r2:		R3_TO_LWREG	(2);
+lw_r3:		R3_TO_LWREG_V	(3);
+lw_r4:		R3_TO_LWREG_V	(4);
+lw_r5:		R3_TO_LWREG_V	(5);
+lw_r6:		R3_TO_LWREG_V	(6);
+lw_r7:		R3_TO_LWREG	(7);
+lw_r8:		R3_TO_LWREG	(8);
+lw_r9:		R3_TO_LWREG	(9);
+lw_r10:		R3_TO_LWREG	(10);
+lw_r11:		R3_TO_LWREG	(11);
+lw_r12:		R3_TO_LWREG	(12);
+lw_r13:		R3_TO_LWREG	(13);
+lw_r14:		R3_TO_LWREG	(14);
+lw_r15:		R3_TO_LWREG	(15);
+lw_r16:		R3_TO_LWREG	(16);
+lw_r17:		LWREG_NOP;
+lw_r18:		R3_TO_LWREG	(18);
+lw_r19:		R3_TO_LWREG	(19);
+lw_r20:		R3_TO_LWREG	(20);
+lw_r21:		R3_TO_LWREG	(21);
+lw_r22:		R3_TO_LWREG	(22);
+lw_r23:		R3_TO_LWREG	(23);
+lw_r24:		R3_TO_LWREG	(24);
+lw_r25:		R3_TO_LWREG	(25);
+lw_r26:		R3_TO_LWREG	(26);
+lw_r27:		R3_TO_LWREG	(27);
+lw_r28:		R3_TO_LWREG	(28);
+lw_r29:		R3_TO_LWREG	(29);
+lw_r30:		R3_TO_LWREG	(30);
+lw_r31:		R3_TO_LWREG	(31);
+
+sw_table:
+sw_r0:		SWREG_TO_R3	(0);
+sw_r1:		SWREG_NOP;
+sw_r2:		SWREG_TO_R3	(2);
+sw_r3:		SWREG_TO_R3_V	(3);
+sw_r4:		SWREG_TO_R3_V	(4);
+sw_r5:		SWREG_TO_R3_V	(5);
+sw_r6:		SWREG_TO_R3_V	(6);
+sw_r7:		SWREG_TO_R3	(7);
+sw_r8:		SWREG_TO_R3	(8);
+sw_r9:		SWREG_TO_R3	(9);
+sw_r10:		SWREG_TO_R3	(10);
+sw_r11:		SWREG_TO_R3	(11);
+sw_r12:		SWREG_TO_R3	(12);
+sw_r13:		SWREG_TO_R3	(13);
+sw_r14:		SWREG_TO_R3	(14);
+sw_r15:		SWREG_TO_R3	(15);
+sw_r16:		SWREG_TO_R3	(16);
+sw_r17:		SWREG_NOP;
+sw_r18:		SWREG_TO_R3	(18);
+sw_r19:		SWREG_TO_R3	(19);
+sw_r20:		SWREG_TO_R3	(20);
+sw_r21:		SWREG_TO_R3	(21);
+sw_r22:		SWREG_TO_R3	(22);
+sw_r23:		SWREG_TO_R3	(23);
+sw_r24:		SWREG_TO_R3	(24);
+sw_r25:		SWREG_TO_R3	(25);
+sw_r26:		SWREG_TO_R3	(26);
+sw_r27:		SWREG_TO_R3	(27);
+sw_r28:		SWREG_TO_R3	(28);
+sw_r29:		SWREG_TO_R3	(29);
+sw_r30:		SWREG_TO_R3	(30);
+sw_r31:		SWREG_TO_R3	(31);
+
+/* Temporary data structures used in the handler */
+.section .data
+.align 4
+ex_tmp_data_loc_0:
+	.byte 0
+ex_tmp_data_loc_1:
+	.byte 0
+ex_tmp_data_loc_2:
+	.byte 0
+ex_tmp_data_loc_3:
+	.byte 0
+ex_reg_op:
+	.byte 0
diff --git a/arch/microblaze/kernel/init_task.c b/arch/microblaze/kernel/init_task.c
new file mode 100644
index 00000000000..48eb9fb255f
--- /dev/null
+++ b/arch/microblaze/kernel/init_task.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/init_task.h>
+#include <linux/fs.h>
+#include <linux/mqueue.h>
+
+#include <asm/pgtable.h>
+
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+struct mm_struct init_mm = INIT_MM(init_mm);
+EXPORT_SYMBOL(init_mm);
+
+union thread_union init_thread_union
+	__attribute__((__section__(".data.init_task"))) =
+{ INIT_THREAD_INFO(init_task) };
+
+struct task_struct init_task = INIT_TASK(init_task);
+EXPORT_SYMBOL(init_task);
diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c
new file mode 100644
index 00000000000..a69d3e3c2fd
--- /dev/null
+++ b/arch/microblaze/kernel/intc.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <asm/page.h>
+#include <linux/io.h>
+
+#include <asm/prom.h>
+#include <asm/irq.h>
+
+#ifdef CONFIG_SELFMOD_INTC
+#include <asm/selfmod.h>
+#define INTC_BASE	BARRIER_BASE_ADDR
+#else
+static unsigned int intc_baseaddr;
+#define INTC_BASE	intc_baseaddr
+#endif
+
+unsigned int nr_irq;
+
+/* No one else should require these constants, so define them locally here. */
+#define ISR 0x00			/* Interrupt Status Register */
+#define IPR 0x04			/* Interrupt Pending Register */
+#define IER 0x08			/* Interrupt Enable Register */
+#define IAR 0x0c			/* Interrupt Acknowledge Register */
+#define SIE 0x10			/* Set Interrupt Enable bits */
+#define CIE 0x14			/* Clear Interrupt Enable bits */
+#define IVR 0x18			/* Interrupt Vector Register */
+#define MER 0x1c			/* Master Enable Register */
+
+#define MER_ME (1<<0)
+#define MER_HIE (1<<1)
+
+static void intc_enable_or_unmask(unsigned int irq)
+{
+	pr_debug("enable_or_unmask: %d\n", irq);
+	out_be32(INTC_BASE + SIE, 1 << irq);
+}
+
+static void intc_disable_or_mask(unsigned int irq)
+{
+	pr_debug("disable: %d\n", irq);
+	out_be32(INTC_BASE + CIE, 1 << irq);
+}
+
+static void intc_ack(unsigned int irq)
+{
+	pr_debug("ack: %d\n", irq);
+	out_be32(INTC_BASE + IAR, 1 << irq);
+}
+
+static void intc_mask_ack(unsigned int irq)
+{
+	unsigned long mask = 1 << irq;
+	pr_debug("disable_and_ack: %d\n", irq);
+	out_be32(INTC_BASE + CIE, mask);
+	out_be32(INTC_BASE + IAR, mask);
+}
+
+static void intc_end(unsigned int irq)
+{
+	unsigned long mask = 1 << irq;
+	pr_debug("end: %d\n", irq);
+	if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
+		out_be32(INTC_BASE + SIE, mask);
+		/* ack level sensitive intr */
+		if (irq_desc[irq].status & IRQ_LEVEL)
+			out_be32(INTC_BASE + IAR, mask);
+	}
+}
+
+static struct irq_chip intc_dev = {
+	.name = "Xilinx INTC",
+	.unmask = intc_enable_or_unmask,
+	.mask = intc_disable_or_mask,
+	.ack = intc_ack,
+	.mask_ack = intc_mask_ack,
+	.end = intc_end,
+};
+
+unsigned int get_irq(struct pt_regs *regs)
+{
+	int irq;
+
+	/*
+	 * NOTE: This function is the one that needs to be improved in
+	 * order to handle multiple interrupt controllers. It currently
+	 * is hardcoded to check for interrupts only on the first INTC.
+	 */
+	irq = in_be32(INTC_BASE + IVR);
+	pr_debug("get_irq: %d\n", irq);
+
+	return irq;
+}
+
+void __init init_IRQ(void)
+{
+	u32 i, j, intr_type;
+	struct device_node *intc = NULL;
+#ifdef CONFIG_SELFMOD_INTC
+	unsigned int intc_baseaddr = 0;
+	static int arr_func[] = {
+				(int)&get_irq,
+				(int)&intc_enable_or_unmask,
+				(int)&intc_disable_or_mask,
+				(int)&intc_mask_ack,
+				(int)&intc_ack,
+				(int)&intc_end,
+				0
+			};
+#endif
+	static char *intc_list[] = {
+				"xlnx,xps-intc-1.00.a",
+				"xlnx,opb-intc-1.00.c",
+				"xlnx,opb-intc-1.00.b",
+				"xlnx,opb-intc-1.00.a",
+				NULL
+			};
+
+	for (j = 0; intc_list[j] != NULL; j++) {
+		intc = of_find_compatible_node(NULL, NULL, intc_list[j]);
+		if (intc)
+			break;
+	}
+
+	intc_baseaddr = *(int *) of_get_property(intc, "reg", NULL);
+	intc_baseaddr = (unsigned long) ioremap(intc_baseaddr, PAGE_SIZE);
+	nr_irq = *(int *) of_get_property(intc, "xlnx,num-intr-inputs", NULL);
+
+	intr_type =
+		*(int *) of_get_property(intc, "xlnx,kind-of-intr", NULL);
+	if (intr_type >= (1 << nr_irq))
+		printk(KERN_INFO " ERROR: Mishmash in king-of-intr param\n");
+
+#ifdef CONFIG_SELFMOD_INTC
+	selfmod_function((int *) arr_func, intc_baseaddr);
+#endif
+	printk(KERN_INFO "%s #0 at 0x%08x, num_irq=%d, edge=0x%x\n",
+		intc_list[j], intc_baseaddr, nr_irq, intr_type);
+
+	/*
+	 * Disable all external interrupts until they are
+	 * explicity requested.
+	 */
+	out_be32(intc_baseaddr + IER, 0);
+
+	/* Acknowledge any pending interrupts just in case. */
+	out_be32(intc_baseaddr + IAR, 0xffffffff);
+
+	/* Turn on the Master Enable. */
+	out_be32(intc_baseaddr + MER, MER_HIE | MER_ME);
+
+	for (i = 0; i < nr_irq; ++i) {
+		if (intr_type & (0x00000001 << i)) {
+			set_irq_chip_and_handler_name(i, &intc_dev,
+				handle_edge_irq, intc_dev.name);
+			irq_desc[i].status &= ~IRQ_LEVEL;
+		} else {
+			set_irq_chip_and_handler_name(i, &intc_dev,
+				handle_level_irq, intc_dev.name);
+			irq_desc[i].status |= IRQ_LEVEL;
+		}
+	}
+}
diff --git a/arch/microblaze/kernel/irq.c b/arch/microblaze/kernel/irq.c
new file mode 100644
index 00000000000..f688ee93e3b
--- /dev/null
+++ b/arch/microblaze/kernel/irq.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/hardirq.h>
+#include <linux/interrupt.h>
+#include <linux/irqflags.h>
+#include <linux/seq_file.h>
+#include <linux/kernel_stat.h>
+#include <linux/irq.h>
+
+#include <asm/prom.h>
+
+unsigned int irq_of_parse_and_map(struct device_node *dev, int index)
+{
+	struct of_irq oirq;
+
+	if (of_irq_map_one(dev, index, &oirq))
+		return NO_IRQ;
+
+	return oirq.specifier[0];
+}
+EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
+
+/*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves.
+ */
+void ack_bad_irq(unsigned int irq)
+{
+	printk(KERN_WARNING "unexpected IRQ trap at vector %02x\n", irq);
+}
+
+static u32 concurrent_irq;
+
+void do_IRQ(struct pt_regs *regs)
+{
+	unsigned int irq;
+	struct pt_regs *old_regs = set_irq_regs(regs);
+
+	irq_enter();
+	irq = get_irq(regs);
+next_irq:
+	BUG_ON(irq == -1U);
+	generic_handle_irq(irq);
+
+	irq = get_irq(regs);
+	if (irq != -1U) {
+		pr_debug("next irq: %d\n", irq);
+		++concurrent_irq;
+		goto next_irq;
+	}
+
+	irq_exit();
+	set_irq_regs(old_regs);
+}
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+	int i = *(loff_t *) v, j;
+	struct irqaction *action;
+	unsigned long flags;
+
+	if (i == 0) {
+		seq_printf(p, "		");
+		for_each_online_cpu(j)
+			seq_printf(p, "CPU%-8d", j);
+		seq_putc(p, '\n');
+	}
+
+	if (i < nr_irq) {
+		spin_lock_irqsave(&irq_desc[i].lock, flags);
+		action = irq_desc[i].action;
+		if (!action)
+			goto skip;
+		seq_printf(p, "%3d: ", i);
+#ifndef CONFIG_SMP
+		seq_printf(p, "%10u ", kstat_irqs(i));
+#else
+		for_each_online_cpu(j)
+			seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+#endif
+		seq_printf(p, " %8s", irq_desc[i].status &
+					IRQ_LEVEL ? "level" : "edge");
+		seq_printf(p, " %8s", irq_desc[i].chip->name);
+		seq_printf(p, "  %s", action->name);
+
+		for (action = action->next; action; action = action->next)
+			seq_printf(p, ", %s", action->name);
+
+		seq_putc(p, '\n');
+skip:
+		spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+	}
+	return 0;
+}
diff --git a/arch/microblaze/kernel/microblaze_ksyms.c b/arch/microblaze/kernel/microblaze_ksyms.c
new file mode 100644
index 00000000000..5f71790e3c3
--- /dev/null
+++ b/arch/microblaze/kernel/microblaze_ksyms.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/cryptohash.h>
+#include <linux/delay.h>
+#include <linux/in6.h>
+#include <linux/syscalls.h>
+
+#include <asm/checksum.h>
+#include <linux/io.h>
+#include <asm/page.h>
+#include <asm/system.h>
+#include <linux/uaccess.h>
+
+/*
+ * libgcc functions - functions that are used internally by the
+ * compiler... (prototypes are not correct though, but that
+ * doesn't really matter since they're not versioned).
+ */
+extern void __ashldi3(void);
+EXPORT_SYMBOL(__ashldi3);
+extern void __ashrdi3(void);
+EXPORT_SYMBOL(__ashrdi3);
+extern void __divsi3(void);
+EXPORT_SYMBOL(__divsi3);
+extern void __lshrdi3(void);
+EXPORT_SYMBOL(__lshrdi3);
+extern void __modsi3(void);
+EXPORT_SYMBOL(__modsi3);
+extern void __mulsi3(void);
+EXPORT_SYMBOL(__mulsi3);
+extern void __muldi3(void);
+EXPORT_SYMBOL(__muldi3);
+extern void __ucmpdi2(void);
+EXPORT_SYMBOL(__ucmpdi2);
+extern void __udivsi3(void);
+EXPORT_SYMBOL(__udivsi3);
+extern void __umodsi3(void);
+EXPORT_SYMBOL(__umodsi3);
diff --git a/arch/microblaze/kernel/module.c b/arch/microblaze/kernel/module.c
new file mode 100644
index 00000000000..51414171326
--- /dev/null
+++ b/arch/microblaze/kernel/module.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleloader.h>
+#include <linux/kernel.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+
+#include <asm/pgtable.h>
+
+void *module_alloc(unsigned long size)
+{
+	void *ret;
+	ret = (size == 0) ? NULL : vmalloc(size);
+	pr_debug("module_alloc (%08lx@%08lx)\n", size, (unsigned long int)ret);
+	return ret;
+}
+
+void module_free(struct module *module, void *region)
+{
+	pr_debug("module_free(%s,%08lx)\n", module->name,
+					(unsigned long)region);
+	vfree(region);
+}
+
+int module_frob_arch_sections(Elf_Ehdr *hdr,
+				Elf_Shdr *sechdrs,
+				char *secstrings,
+				struct module *mod)
+{
+	return 0;
+}
+
+int apply_relocate(Elf32_Shdr *sechdrs, const char *strtab,
+	unsigned int symindex, unsigned int relsec, struct module *module)
+{
+	printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n",
+		module->name);
+	return -ENOEXEC;
+}
+
+int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
+	unsigned int symindex, unsigned int relsec, struct module *module)
+{
+
+	unsigned int i;
+	Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
+	Elf32_Sym *sym;
+	unsigned long int *location;
+	unsigned long int locoffs;
+	unsigned long int value;
+#if __GNUC__ < 4
+	unsigned long int old_value;
+#endif
+
+	pr_debug("Applying add relocation section %u to %u\n",
+		relsec, sechdrs[relsec].sh_info);
+
+	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
+
+		location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr +
+				rela[i].r_offset;
+		sym = (Elf32_Sym *)sechdrs[symindex].sh_addr +
+			ELF32_R_SYM(rela[i].r_info);
+		value = sym->st_value + rela[i].r_addend;
+
+		switch (ELF32_R_TYPE(rela[i].r_info)) {
+
+		/*
+		 * Be careful! mb-gcc / mb-ld splits the relocs between the
+		 * text and the reloc table. In general this means we must
+		 * read the current contents of (*location), add any offset
+		 * then store the result back in
+		 */
+
+		case R_MICROBLAZE_32:
+#if __GNUC__ < 4
+			old_value = *location;
+			*location = value + old_value;
+
+			pr_debug("R_MICROBLAZE_32 (%08lx->%08lx)\n",
+				old_value, value);
+#else
+			*location = value;
+#endif
+			break;
+
+		case R_MICROBLAZE_64:
+#if __GNUC__ < 4
+			/* Split relocs only required/used pre gcc4.1.1 */
+			old_value = ((location[0] & 0x0000FFFF) << 16) |
+					(location[1] & 0x0000FFFF);
+			value += old_value;
+#endif
+			location[0] = (location[0] & 0xFFFF0000) |
+					(value >> 16);
+			location[1] = (location[1] & 0xFFFF0000) |
+					(value & 0xFFFF);
+#if __GNUC__ < 4
+			pr_debug("R_MICROBLAZE_64 (%08lx->%08lx)\n",
+				old_value, value);
+#endif
+			break;
+
+		case R_MICROBLAZE_64_PCREL:
+			locoffs = (location[0] & 0xFFFF) << 16 |
+				(location[1] & 0xFFFF);
+			value -= (unsigned long int)(location) + 4 +
+				locoffs;
+			location[0] = (location[0] & 0xFFFF0000) |
+					(value >> 16);
+			location[1] = (location[1] & 0xFFFF0000) |
+					(value & 0xFFFF);
+			pr_debug("R_MICROBLAZE_64_PCREL (%08lx)\n",
+				value);
+			break;
+
+		case R_MICROBLAZE_NONE:
+			pr_debug("R_MICROBLAZE_NONE\n");
+			break;
+
+		default:
+			printk(KERN_ERR "module %s: "
+				"Unknown relocation: %u\n",
+				module->name,
+				ELF32_R_TYPE(rela->r_info));
+			return -ENOEXEC;
+		}
+	}
+	return 0;
+}
+
+int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
+		struct module *module)
+{
+	return 0;
+}
+
+void module_arch_cleanup(struct module *mod)
+{
+}
diff --git a/arch/microblaze/kernel/of_device.c b/arch/microblaze/kernel/of_device.c
new file mode 100644
index 00000000000..9a0f7632c47
--- /dev/null
+++ b/arch/microblaze/kernel/of_device.c
@@ -0,0 +1,113 @@
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+#include <linux/of_device.h>
+
+#include <linux/errno.h>
+
+void of_device_make_bus_id(struct of_device *dev)
+{
+	static atomic_t bus_no_reg_magic;
+	struct device_node *node = dev->node;
+	const u32 *reg;
+	u64 addr;
+	int magic;
+
+	/*
+	 * For MMIO, get the physical address
+	 */
+	reg = of_get_property(node, "reg", NULL);
+	if (reg) {
+		addr = of_translate_address(node, reg);
+		if (addr != OF_BAD_ADDR) {
+			dev_set_name(&dev->dev, "%llx.%s",
+				     (unsigned long long)addr, node->name);
+			return;
+		}
+	}
+
+	/*
+	 * No BusID, use the node name and add a globally incremented
+	 * counter (and pray...)
+	 */
+	magic = atomic_add_return(1, &bus_no_reg_magic);
+	dev_set_name(&dev->dev, "%s.%d", node->name, magic - 1);
+}
+EXPORT_SYMBOL(of_device_make_bus_id);
+
+struct of_device *of_device_alloc(struct device_node *np,
+				  const char *bus_id,
+				  struct device *parent)
+{
+	struct of_device *dev;
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return NULL;
+
+	dev->node = of_node_get(np);
+	dev->dev.dma_mask = &dev->dma_mask;
+	dev->dev.parent = parent;
+	dev->dev.release = of_release_dev;
+	dev->dev.archdata.of_node = np;
+
+	if (bus_id)
+		dev_set_name(&dev->dev, bus_id);
+	else
+		of_device_make_bus_id(dev);
+
+	return dev;
+}
+EXPORT_SYMBOL(of_device_alloc);
+
+int of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct of_device *ofdev;
+	const char *compat;
+	int seen = 0, cplen, sl;
+
+	if (!dev)
+		return -ENODEV;
+
+	ofdev = to_of_device(dev);
+
+	if (add_uevent_var(env, "OF_NAME=%s", ofdev->node->name))
+		return -ENOMEM;
+
+	if (add_uevent_var(env, "OF_TYPE=%s", ofdev->node->type))
+		return -ENOMEM;
+
+	/* Since the compatible field can contain pretty much anything
+	 * it's not really legal to split it out with commas. We split it
+	 * up using a number of environment variables instead. */
+
+	compat = of_get_property(ofdev->node, "compatible", &cplen);
+	while (compat && *compat && cplen > 0) {
+		if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat))
+			return -ENOMEM;
+
+		sl = strlen(compat) + 1;
+		compat += sl;
+		cplen -= sl;
+		seen++;
+	}
+
+	if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen))
+		return -ENOMEM;
+
+	/* modalias is trickier, we add it in 2 steps */
+	if (add_uevent_var(env, "MODALIAS="))
+		return -ENOMEM;
+	sl = of_device_get_modalias(ofdev, &env->buf[env->buflen-1],
+				    sizeof(env->buf) - env->buflen);
+	if (sl >= (sizeof(env->buf) - env->buflen))
+		return -ENOMEM;
+	env->buflen += sl;
+
+	return 0;
+}
+EXPORT_SYMBOL(of_device_uevent);
diff --git a/arch/microblaze/kernel/of_platform.c b/arch/microblaze/kernel/of_platform.c
new file mode 100644
index 00000000000..acf4574d0f1
--- /dev/null
+++ b/arch/microblaze/kernel/of_platform.c
@@ -0,0 +1,201 @@
+/*
+ *    Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
+ *			 <benh@kernel.crashing.org>
+ *    and		 Arnd Bergmann, IBM Corp.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ *
+ */
+
+#undef DEBUG
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+
+#include <linux/errno.h>
+#include <linux/topology.h>
+#include <asm/atomic.h>
+
+struct bus_type of_platform_bus_type = {
+       .uevent	= of_device_uevent,
+};
+EXPORT_SYMBOL(of_platform_bus_type);
+
+static int __init of_bus_driver_init(void)
+{
+	return of_bus_type_init(&of_platform_bus_type, "of_platform");
+}
+postcore_initcall(of_bus_driver_init);
+
+struct of_device *of_platform_device_create(struct device_node *np,
+					    const char *bus_id,
+					    struct device *parent)
+{
+	struct of_device *dev;
+
+	dev = of_device_alloc(np, bus_id, parent);
+	if (!dev)
+		return NULL;
+
+	dev->dma_mask = 0xffffffffUL;
+	dev->dev.bus = &of_platform_bus_type;
+
+	/* We do not fill the DMA ops for platform devices by default.
+	 * This is currently the responsibility of the platform code
+	 * to do such, possibly using a device notifier
+	 */
+
+	if (of_device_register(dev) != 0) {
+		of_device_free(dev);
+		return NULL;
+	}
+
+	return dev;
+}
+EXPORT_SYMBOL(of_platform_device_create);
+
+/**
+ * of_platform_bus_create - Create an OF device for a bus node and all its
+ * children. Optionally recursively instanciate matching busses.
+ * @bus: device node of the bus to instanciate
+ * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to
+ * disallow recursive creation of child busses
+ */
+static int of_platform_bus_create(const struct device_node *bus,
+				  const struct of_device_id *matches,
+				  struct device *parent)
+{
+	struct device_node *child;
+	struct of_device *dev;
+	int rc = 0;
+
+	for_each_child_of_node(bus, child) {
+		pr_debug("   create child: %s\n", child->full_name);
+		dev = of_platform_device_create(child, NULL, parent);
+		if (dev == NULL)
+			rc = -ENOMEM;
+		else if (!of_match_node(matches, child))
+			continue;
+		if (rc == 0) {
+			pr_debug("   and sub busses\n");
+			rc = of_platform_bus_create(child, matches, &dev->dev);
+		}
+		if (rc) {
+			of_node_put(child);
+			break;
+		}
+	}
+	return rc;
+}
+
+
+/**
+ * of_platform_bus_probe - Probe the device-tree for platform busses
+ * @root: parent of the first level to probe or NULL for the root of the tree
+ * @matches: match table, NULL to use the default
+ * @parent: parent to hook devices from, NULL for toplevel
+ *
+ * Note that children of the provided root are not instanciated as devices
+ * unless the specified root itself matches the bus list and is not NULL.
+ */
+
+int of_platform_bus_probe(struct device_node *root,
+			  const struct of_device_id *matches,
+			  struct device *parent)
+{
+	struct device_node *child;
+	struct of_device *dev;
+	int rc = 0;
+
+	if (matches == NULL)
+		matches = of_default_bus_ids;
+	if (matches == OF_NO_DEEP_PROBE)
+		return -EINVAL;
+	if (root == NULL)
+		root = of_find_node_by_path("/");
+	else
+		of_node_get(root);
+
+	pr_debug("of_platform_bus_probe()\n");
+	pr_debug(" starting at: %s\n", root->full_name);
+
+	/* Do a self check of bus type, if there's a match, create
+	 * children
+	 */
+	if (of_match_node(matches, root)) {
+		pr_debug(" root match, create all sub devices\n");
+		dev = of_platform_device_create(root, NULL, parent);
+		if (dev == NULL) {
+			rc = -ENOMEM;
+			goto bail;
+		}
+		pr_debug(" create all sub busses\n");
+		rc = of_platform_bus_create(root, matches, &dev->dev);
+		goto bail;
+	}
+	for_each_child_of_node(root, child) {
+		if (!of_match_node(matches, child))
+			continue;
+
+		pr_debug("  match: %s\n", child->full_name);
+		dev = of_platform_device_create(child, NULL, parent);
+		if (dev == NULL)
+			rc = -ENOMEM;
+		else
+			rc = of_platform_bus_create(child, matches, &dev->dev);
+		if (rc) {
+			of_node_put(child);
+			break;
+		}
+	}
+ bail:
+	of_node_put(root);
+	return rc;
+}
+EXPORT_SYMBOL(of_platform_bus_probe);
+
+static int of_dev_node_match(struct device *dev, void *data)
+{
+	return to_of_device(dev)->node == data;
+}
+
+struct of_device *of_find_device_by_node(struct device_node *np)
+{
+	struct device *dev;
+
+	dev = bus_find_device(&of_platform_bus_type,
+			      NULL, np, of_dev_node_match);
+	if (dev)
+		return to_of_device(dev);
+	return NULL;
+}
+EXPORT_SYMBOL(of_find_device_by_node);
+
+static int of_dev_phandle_match(struct device *dev, void *data)
+{
+	phandle *ph = data;
+	return to_of_device(dev)->node->linux_phandle == *ph;
+}
+
+struct of_device *of_find_device_by_phandle(phandle ph)
+{
+	struct device *dev;
+
+	dev = bus_find_device(&of_platform_bus_type,
+			      NULL, &ph, of_dev_phandle_match);
+	if (dev)
+		return to_of_device(dev);
+	return NULL;
+}
+EXPORT_SYMBOL(of_find_device_by_phandle);
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
new file mode 100644
index 00000000000..07d4fa339ed
--- /dev/null
+++ b/arch/microblaze/kernel/process.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/pm.h>
+#include <linux/tick.h>
+#include <linux/bitops.h>
+#include <asm/system.h>
+#include <asm/pgalloc.h>
+
+void show_regs(struct pt_regs *regs)
+{
+	printk(KERN_INFO " Registers dump: mode=%X\r\n", regs->pt_mode);
+	printk(KERN_INFO " r1=%08lX, r2=%08lX, r3=%08lX, r4=%08lX\n",
+				regs->r1, regs->r2, regs->r3, regs->r4);
+	printk(KERN_INFO " r5=%08lX, r6=%08lX, r7=%08lX, r8=%08lX\n",
+				regs->r5, regs->r6, regs->r7, regs->r8);
+	printk(KERN_INFO " r9=%08lX, r10=%08lX, r11=%08lX, r12=%08lX\n",
+				regs->r9, regs->r10, regs->r11, regs->r12);
+	printk(KERN_INFO " r13=%08lX, r14=%08lX, r15=%08lX, r16=%08lX\n",
+				regs->r13, regs->r14, regs->r15, regs->r16);
+	printk(KERN_INFO " r17=%08lX, r18=%08lX, r19=%08lX, r20=%08lX\n",
+				regs->r17, regs->r18, regs->r19, regs->r20);
+	printk(KERN_INFO " r21=%08lX, r22=%08lX, r23=%08lX, r24=%08lX\n",
+				regs->r21, regs->r22, regs->r23, regs->r24);
+	printk(KERN_INFO " r25=%08lX, r26=%08lX, r27=%08lX, r28=%08lX\n",
+				regs->r25, regs->r26, regs->r27, regs->r28);
+	printk(KERN_INFO " r29=%08lX, r30=%08lX, r31=%08lX, rPC=%08lX\n",
+				regs->r29, regs->r30, regs->r31, regs->pc);
+	printk(KERN_INFO " msr=%08lX, ear=%08lX, esr=%08lX, fsr=%08lX\n",
+				regs->msr, regs->ear, regs->esr, regs->fsr);
+}
+
+void (*pm_idle)(void);
+void (*pm_power_off)(void) = NULL;
+EXPORT_SYMBOL(pm_power_off);
+
+static int hlt_counter = 1;
+
+void disable_hlt(void)
+{
+	hlt_counter++;
+}
+EXPORT_SYMBOL(disable_hlt);
+
+void enable_hlt(void)
+{
+	hlt_counter--;
+}
+EXPORT_SYMBOL(enable_hlt);
+
+static int __init nohlt_setup(char *__unused)
+{
+	hlt_counter = 1;
+	return 1;
+}
+__setup("nohlt", nohlt_setup);
+
+static int __init hlt_setup(char *__unused)
+{
+	hlt_counter = 0;
+	return 1;
+}
+__setup("hlt", hlt_setup);
+
+void default_idle(void)
+{
+	if (!hlt_counter) {
+		clear_thread_flag(TIF_POLLING_NRFLAG);
+		smp_mb__after_clear_bit();
+		local_irq_disable();
+		while (!need_resched())
+			cpu_sleep();
+		local_irq_enable();
+		set_thread_flag(TIF_POLLING_NRFLAG);
+	} else
+		while (!need_resched())
+			cpu_relax();
+}
+
+void cpu_idle(void)
+{
+	set_thread_flag(TIF_POLLING_NRFLAG);
+
+	/* endless idle loop with no priority at all */
+	while (1) {
+		void (*idle)(void) = pm_idle;
+
+		if (!idle)
+			idle = default_idle;
+
+		tick_nohz_stop_sched_tick(1);
+		while (!need_resched())
+			idle();
+		tick_nohz_restart_sched_tick();
+
+		preempt_enable_no_resched();
+		schedule();
+		preempt_disable();
+		check_pgt_cache();
+	}
+}
+
+void flush_thread(void)
+{
+}
+
+int copy_thread(unsigned long clone_flags, unsigned long usp,
+		unsigned long unused,
+		struct task_struct *p, struct pt_regs *regs)
+{
+	struct pt_regs *childregs = task_pt_regs(p);
+	struct thread_info *ti = task_thread_info(p);
+
+	*childregs = *regs;
+	if (user_mode(regs))
+		childregs->r1 = usp;
+	else
+		childregs->r1 = ((unsigned long) ti) + THREAD_SIZE;
+
+	memset(&ti->cpu_context, 0, sizeof(struct cpu_context));
+	ti->cpu_context.r1 = (unsigned long)childregs;
+	ti->cpu_context.msr = (unsigned long)childregs->msr;
+	ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8;
+
+	if (clone_flags & CLONE_SETTLS)
+		;
+
+	return 0;
+}
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+unsigned long thread_saved_pc(struct task_struct *tsk)
+{
+	struct cpu_context *ctx =
+		&(((struct thread_info *)(tsk->stack))->cpu_context);
+
+	/* Check whether the thread is blocked in resume() */
+	if (in_sched_functions(ctx->r15))
+		return (unsigned long)ctx->r15;
+	else
+		return ctx->r14;
+}
+
+static void kernel_thread_helper(int (*fn)(void *), void *arg)
+{
+	fn(arg);
+	do_exit(-1);
+}
+
+int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
+{
+	struct pt_regs regs;
+
+	memset(&regs, 0, sizeof(regs));
+	/* store them in non-volatile registers */
+	regs.r5 = (unsigned long)fn;
+	regs.r6 = (unsigned long)arg;
+	local_save_flags(regs.msr);
+	regs.pc = (unsigned long)kernel_thread_helper;
+	regs.pt_mode = 1;
+
+	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
+			&regs, 0, NULL, NULL);
+}
+
+unsigned long get_wchan(struct task_struct *p)
+{
+/* TBD (used by procfs) */
+	return 0;
+}
+
+/* Set up a thread for executing a new program */
+void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp)
+{
+	set_fs(USER_DS);
+	regs->pc = pc;
+	regs->r1 = usp;
+	regs->pt_mode = 0;
+}
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
new file mode 100644
index 00000000000..34c48718061
--- /dev/null
+++ b/arch/microblaze/kernel/prom.c
@@ -0,0 +1,1146 @@
+/*
+ * Procedures for creating, accessing and interpreting the device tree.
+ *
+ * Paul Mackerras	August 1996.
+ * Copyright (C) 1996-2005 Paul Mackerras.
+ *
+ *  Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
+ *    {engebret|bergner}@us.ibm.com
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#include <stdarg.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/threads.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/stringify.h>
+#include <linux/delay.h>
+#include <linux/initrd.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/kexec.h>
+#include <linux/debugfs.h>
+#include <linux/irq.h>
+#include <linux/lmb.h>
+
+#include <asm/prom.h>
+#include <asm/page.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+#include <linux/io.h>
+#include <asm/system.h>
+#include <asm/mmu.h>
+#include <asm/pgtable.h>
+#include <asm/sections.h>
+#include <asm/pci-bridge.h>
+
+static int __initdata dt_root_addr_cells;
+static int __initdata dt_root_size_cells;
+
+typedef u32 cell_t;
+
+static struct boot_param_header *initial_boot_params;
+
+/* export that to outside world */
+struct device_node *of_chosen;
+
+static inline char *find_flat_dt_string(u32 offset)
+{
+	return ((char *)initial_boot_params) +
+		initial_boot_params->off_dt_strings + offset;
+}
+
+/**
+ * This function is used to scan the flattened device-tree, it is
+ * used to extract the memory informations at boot before we can
+ * unflatten the tree
+ */
+int __init of_scan_flat_dt(int (*it)(unsigned long node,
+				     const char *uname, int depth,
+				     void *data),
+			   void *data)
+{
+	unsigned long p = ((unsigned long)initial_boot_params) +
+		initial_boot_params->off_dt_struct;
+	int rc = 0;
+	int depth = -1;
+
+	do {
+		u32 tag = *((u32 *)p);
+		char *pathp;
+
+		p += 4;
+		if (tag == OF_DT_END_NODE) {
+			depth--;
+			continue;
+		}
+		if (tag == OF_DT_NOP)
+			continue;
+		if (tag == OF_DT_END)
+			break;
+		if (tag == OF_DT_PROP) {
+			u32 sz = *((u32 *)p);
+			p += 8;
+			if (initial_boot_params->version < 0x10)
+				p = _ALIGN(p, sz >= 8 ? 8 : 4);
+			p += sz;
+			p = _ALIGN(p, 4);
+			continue;
+		}
+		if (tag != OF_DT_BEGIN_NODE) {
+			printk(KERN_WARNING "Invalid tag %x scanning flattened"
+				" device tree !\n", tag);
+			return -EINVAL;
+		}
+		depth++;
+		pathp = (char *)p;
+		p = _ALIGN(p + strlen(pathp) + 1, 4);
+		if ((*pathp) == '/') {
+			char *lp, *np;
+			for (lp = NULL, np = pathp; *np; np++)
+				if ((*np) == '/')
+					lp = np+1;
+			if (lp != NULL)
+				pathp = lp;
+		}
+		rc = it(p, pathp, depth, data);
+		if (rc != 0)
+			break;
+	} while (1);
+
+	return rc;
+}
+
+unsigned long __init of_get_flat_dt_root(void)
+{
+	unsigned long p = ((unsigned long)initial_boot_params) +
+		initial_boot_params->off_dt_struct;
+
+	while (*((u32 *)p) == OF_DT_NOP)
+		p += 4;
+	BUG_ON(*((u32 *)p) != OF_DT_BEGIN_NODE);
+	p += 4;
+	return _ALIGN(p + strlen((char *)p) + 1, 4);
+}
+
+/**
+ * This function can be used within scan_flattened_dt callback to get
+ * access to properties
+ */
+void *__init of_get_flat_dt_prop(unsigned long node, const char *name,
+				unsigned long *size)
+{
+	unsigned long p = node;
+
+	do {
+		u32 tag = *((u32 *)p);
+		u32 sz, noff;
+		const char *nstr;
+
+		p += 4;
+		if (tag == OF_DT_NOP)
+			continue;
+		if (tag != OF_DT_PROP)
+			return NULL;
+
+		sz = *((u32 *)p);
+		noff = *((u32 *)(p + 4));
+		p += 8;
+		if (initial_boot_params->version < 0x10)
+			p = _ALIGN(p, sz >= 8 ? 8 : 4);
+
+		nstr = find_flat_dt_string(noff);
+		if (nstr == NULL) {
+			printk(KERN_WARNING "Can't find property index"
+				" name !\n");
+			return NULL;
+		}
+		if (strcmp(name, nstr) == 0) {
+			if (size)
+				*size = sz;
+			return (void *)p;
+		}
+		p += sz;
+		p = _ALIGN(p, 4);
+	} while (1);
+}
+
+int __init of_flat_dt_is_compatible(unsigned long node, const char *compat)
+{
+	const char *cp;
+	unsigned long cplen, l;
+
+	cp = of_get_flat_dt_prop(node, "compatible", &cplen);
+	if (cp == NULL)
+		return 0;
+	while (cplen > 0) {
+		if (strncasecmp(cp, compat, strlen(compat)) == 0)
+			return 1;
+		l = strlen(cp) + 1;
+		cp += l;
+		cplen -= l;
+	}
+
+	return 0;
+}
+
+static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size,
+					unsigned long align)
+{
+	void *res;
+
+	*mem = _ALIGN(*mem, align);
+	res = (void *)*mem;
+	*mem += size;
+
+	return res;
+}
+
+static unsigned long __init unflatten_dt_node(unsigned long mem,
+					unsigned long *p,
+					struct device_node *dad,
+					struct device_node ***allnextpp,
+					unsigned long fpsize)
+{
+	struct device_node *np;
+	struct property *pp, **prev_pp = NULL;
+	char *pathp;
+	u32 tag;
+	unsigned int l, allocl;
+	int has_name = 0;
+	int new_format = 0;
+
+	tag = *((u32 *)(*p));
+	if (tag != OF_DT_BEGIN_NODE) {
+		printk("Weird tag at start of node: %x\n", tag);
+		return mem;
+	}
+	*p += 4;
+	pathp = (char *)*p;
+	l = allocl = strlen(pathp) + 1;
+	*p = _ALIGN(*p + l, 4);
+
+	/* version 0x10 has a more compact unit name here instead of the full
+	 * path. we accumulate the full path size using "fpsize", we'll rebuild
+	 * it later. We detect this because the first character of the name is
+	 * not '/'.
+	 */
+	if ((*pathp) != '/') {
+		new_format = 1;
+		if (fpsize == 0) {
+			/* root node: special case. fpsize accounts for path
+			 * plus terminating zero. root node only has '/', so
+			 * fpsize should be 2, but we want to avoid the first
+			 * level nodes to have two '/' so we use fpsize 1 here
+			 */
+			fpsize = 1;
+			allocl = 2;
+		} else {
+			/* account for '/' and path size minus terminal 0
+			 * already in 'l'
+			 */
+			fpsize += l;
+			allocl = fpsize;
+		}
+	}
+
+	np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl,
+				__alignof__(struct device_node));
+	if (allnextpp) {
+		memset(np, 0, sizeof(*np));
+		np->full_name = ((char *)np) + sizeof(struct device_node);
+		if (new_format) {
+			char *p2 = np->full_name;
+			/* rebuild full path for new format */
+			if (dad && dad->parent) {
+				strcpy(p2, dad->full_name);
+#ifdef DEBUG
+				if ((strlen(p2) + l + 1) != allocl) {
+					pr_debug("%s: p: %d, l: %d, a: %d\n",
+						pathp, (int)strlen(p2),
+						l, allocl);
+				}
+#endif
+				p2 += strlen(p2);
+			}
+			*(p2++) = '/';
+			memcpy(p2, pathp, l);
+		} else
+			memcpy(np->full_name, pathp, l);
+		prev_pp = &np->properties;
+		**allnextpp = np;
+		*allnextpp = &np->allnext;
+		if (dad != NULL) {
+			np->parent = dad;
+			/* we temporarily use the next field as `last_child'*/
+			if (dad->next == NULL)
+				dad->child = np;
+			else
+				dad->next->sibling = np;
+			dad->next = np;
+		}
+		kref_init(&np->kref);
+	}
+	while (1) {
+		u32 sz, noff;
+		char *pname;
+
+		tag = *((u32 *)(*p));
+		if (tag == OF_DT_NOP) {
+			*p += 4;
+			continue;
+		}
+		if (tag != OF_DT_PROP)
+			break;
+		*p += 4;
+		sz = *((u32 *)(*p));
+		noff = *((u32 *)((*p) + 4));
+		*p += 8;
+		if (initial_boot_params->version < 0x10)
+			*p = _ALIGN(*p, sz >= 8 ? 8 : 4);
+
+		pname = find_flat_dt_string(noff);
+		if (pname == NULL) {
+			printk(KERN_INFO
+				"Can't find property name in list !\n");
+			break;
+		}
+		if (strcmp(pname, "name") == 0)
+			has_name = 1;
+		l = strlen(pname) + 1;
+		pp = unflatten_dt_alloc(&mem, sizeof(struct property),
+					__alignof__(struct property));
+		if (allnextpp) {
+			if (strcmp(pname, "linux,phandle") == 0) {
+				np->node = *((u32 *)*p);
+				if (np->linux_phandle == 0)
+					np->linux_phandle = np->node;
+			}
+			if (strcmp(pname, "ibm,phandle") == 0)
+				np->linux_phandle = *((u32 *)*p);
+			pp->name = pname;
+			pp->length = sz;
+			pp->value = (void *)*p;
+			*prev_pp = pp;
+			prev_pp = &pp->next;
+		}
+		*p = _ALIGN((*p) + sz, 4);
+	}
+	/* with version 0x10 we may not have the name property, recreate
+	 * it here from the unit name if absent
+	 */
+	if (!has_name) {
+		char *p1 = pathp, *ps = pathp, *pa = NULL;
+		int sz;
+
+		while (*p1) {
+			if ((*p1) == '@')
+				pa = p1;
+			if ((*p1) == '/')
+				ps = p1 + 1;
+			p1++;
+		}
+		if (pa < ps)
+			pa = p1;
+		sz = (pa - ps) + 1;
+		pp = unflatten_dt_alloc(&mem, sizeof(struct property) + sz,
+					__alignof__(struct property));
+		if (allnextpp) {
+			pp->name = "name";
+			pp->length = sz;
+			pp->value = pp + 1;
+			*prev_pp = pp;
+			prev_pp = &pp->next;
+			memcpy(pp->value, ps, sz - 1);
+			((char *)pp->value)[sz - 1] = 0;
+			pr_debug("fixed up name for %s -> %s\n", pathp,
+				(char *)pp->value);
+		}
+	}
+	if (allnextpp) {
+		*prev_pp = NULL;
+		np->name = of_get_property(np, "name", NULL);
+		np->type = of_get_property(np, "device_type", NULL);
+
+		if (!np->name)
+			np->name = "<NULL>";
+		if (!np->type)
+			np->type = "<NULL>";
+	}
+	while (tag == OF_DT_BEGIN_NODE) {
+		mem = unflatten_dt_node(mem, p, np, allnextpp, fpsize);
+		tag = *((u32 *)(*p));
+	}
+	if (tag != OF_DT_END_NODE) {
+		printk(KERN_INFO "Weird tag at end of node: %x\n", tag);
+		return mem;
+	}
+	*p += 4;
+	return mem;
+}
+
+/**
+ * unflattens the device-tree passed by the firmware, creating the
+ * tree of struct device_node. It also fills the "name" and "type"
+ * pointers of the nodes so the normal device-tree walking functions
+ * can be used (this used to be done by finish_device_tree)
+ */
+void __init unflatten_device_tree(void)
+{
+	unsigned long start, mem, size;
+	struct device_node **allnextp = &allnodes;
+
+	pr_debug(" -> unflatten_device_tree()\n");
+
+	/* First pass, scan for size */
+	start = ((unsigned long)initial_boot_params) +
+		initial_boot_params->off_dt_struct;
+	size = unflatten_dt_node(0, &start, NULL, NULL, 0);
+	size = (size | 3) + 1;
+
+	pr_debug("  size is %lx, allocating...\n", size);
+
+	/* Allocate memory for the expanded device tree */
+	mem = lmb_alloc(size + 4, __alignof__(struct device_node));
+	mem = (unsigned long) __va(mem);
+
+	((u32 *)mem)[size / 4] = 0xdeadbeef;
+
+	pr_debug("  unflattening %lx...\n", mem);
+
+	/* Second pass, do actual unflattening */
+	start = ((unsigned long)initial_boot_params) +
+		initial_boot_params->off_dt_struct;
+	unflatten_dt_node(mem, &start, NULL, &allnextp, 0);
+	if (*((u32 *)start) != OF_DT_END)
+		printk(KERN_WARNING "Weird tag at end of tree: %08x\n",
+			*((u32 *)start));
+	if (((u32 *)mem)[size / 4] != 0xdeadbeef)
+		printk(KERN_WARNING "End of tree marker overwritten: %08x\n",
+			((u32 *)mem)[size / 4]);
+	*allnextp = NULL;
+
+	/* Get pointer to OF "/chosen" node for use everywhere */
+	of_chosen = of_find_node_by_path("/chosen");
+	if (of_chosen == NULL)
+		of_chosen = of_find_node_by_path("/chosen@0");
+
+	pr_debug(" <- unflatten_device_tree()\n");
+}
+
+#define early_init_dt_scan_drconf_memory(node) 0
+
+static int __init early_init_dt_scan_cpus(unsigned long node,
+					  const char *uname, int depth,
+					  void *data)
+{
+	static int logical_cpuid;
+	char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+	const u32 *intserv;
+	int i, nthreads;
+	int found = 0;
+
+	/* We are scanning "cpu" nodes only */
+	if (type == NULL || strcmp(type, "cpu") != 0)
+		return 0;
+
+	/* Get physical cpuid */
+	intserv = of_get_flat_dt_prop(node, "reg", NULL);
+	nthreads = 1;
+
+	/*
+	 * Now see if any of these threads match our boot cpu.
+	 * NOTE: This must match the parsing done in smp_setup_cpu_maps.
+	 */
+	for (i = 0; i < nthreads; i++) {
+		/*
+		 * version 2 of the kexec param format adds the phys cpuid of
+		 * booted proc.
+		 */
+		if (initial_boot_params && initial_boot_params->version >= 2) {
+			if (intserv[i] ==
+					initial_boot_params->boot_cpuid_phys) {
+				found = 1;
+				break;
+			}
+		} else {
+			/*
+			 * Check if it's the boot-cpu, set it's hw index now,
+			 * unfortunately this format did not support booting
+			 * off secondary threads.
+			 */
+			if (of_get_flat_dt_prop(node,
+					"linux,boot-cpu", NULL) != NULL) {
+				found = 1;
+				break;
+			}
+		}
+
+#ifdef CONFIG_SMP
+		/* logical cpu id is always 0 on UP kernels */
+		logical_cpuid++;
+#endif
+	}
+
+	if (found) {
+		pr_debug("boot cpu: logical %d physical %d\n", logical_cpuid,
+			intserv[i]);
+		boot_cpuid = logical_cpuid;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+static void __init early_init_dt_check_for_initrd(unsigned long node)
+{
+	unsigned long l;
+	u32 *prop;
+
+	pr_debug("Looking for initrd properties... ");
+
+	prop = of_get_flat_dt_prop(node, "linux,initrd-start", &l);
+	if (prop) {
+		initrd_start = (unsigned long)__va(of_read_ulong(prop, l/4));
+
+		prop = of_get_flat_dt_prop(node, "linux,initrd-end", &l);
+		if (prop) {
+			initrd_end = (unsigned long)
+					__va(of_read_ulong(prop, l/4));
+			initrd_below_start_ok = 1;
+		} else {
+			initrd_start = 0;
+		}
+	}
+
+	pr_debug("initrd_start=0x%lx  initrd_end=0x%lx\n",
+					initrd_start, initrd_end);
+}
+#else
+static inline void early_init_dt_check_for_initrd(unsigned long node)
+{
+}
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+static int __init early_init_dt_scan_chosen(unsigned long node,
+				const char *uname, int depth, void *data)
+{
+	unsigned long l;
+	char *p;
+
+	pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
+
+	if (depth != 1 ||
+		(strcmp(uname, "chosen") != 0 &&
+				strcmp(uname, "chosen@0") != 0))
+		return 0;
+
+#ifdef CONFIG_KEXEC
+	lprop = (u64 *)of_get_flat_dt_prop(node,
+				"linux,crashkernel-base", NULL);
+	if (lprop)
+		crashk_res.start = *lprop;
+
+	lprop = (u64 *)of_get_flat_dt_prop(node,
+				"linux,crashkernel-size", NULL);
+	if (lprop)
+		crashk_res.end = crashk_res.start + *lprop - 1;
+#endif
+
+	early_init_dt_check_for_initrd(node);
+
+	/* Retreive command line */
+	p = of_get_flat_dt_prop(node, "bootargs", &l);
+	if (p != NULL && l > 0)
+		strlcpy(cmd_line, p, min((int)l, COMMAND_LINE_SIZE));
+
+#ifdef CONFIG_CMDLINE
+	if (p == NULL || l == 0 || (l == 1 && (*p) == 0))
+		strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#endif /* CONFIG_CMDLINE */
+
+	pr_debug("Command line is: %s\n", cmd_line);
+
+	/* break now */
+	return 1;
+}
+
+static int __init early_init_dt_scan_root(unsigned long node,
+				const char *uname, int depth, void *data)
+{
+	u32 *prop;
+
+	if (depth != 0)
+		return 0;
+
+	prop = of_get_flat_dt_prop(node, "#size-cells", NULL);
+	dt_root_size_cells = (prop == NULL) ? 1 : *prop;
+	pr_debug("dt_root_size_cells = %x\n", dt_root_size_cells);
+
+	prop = of_get_flat_dt_prop(node, "#address-cells", NULL);
+	dt_root_addr_cells = (prop == NULL) ? 2 : *prop;
+	pr_debug("dt_root_addr_cells = %x\n", dt_root_addr_cells);
+
+	/* break now */
+	return 1;
+}
+
+static u64 __init dt_mem_next_cell(int s, cell_t **cellp)
+{
+	cell_t *p = *cellp;
+
+	*cellp = p + s;
+	return of_read_number(p, s);
+}
+
+static int __init early_init_dt_scan_memory(unsigned long node,
+				const char *uname, int depth, void *data)
+{
+	char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+	cell_t *reg, *endp;
+	unsigned long l;
+
+	/* Look for the ibm,dynamic-reconfiguration-memory node */
+/*	if (depth == 1 &&
+		strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0)
+		return early_init_dt_scan_drconf_memory(node);
+*/
+	/* We are scanning "memory" nodes only */
+	if (type == NULL) {
+		/*
+		 * The longtrail doesn't have a device_type on the
+		 * /memory node, so look for the node called /memory@0.
+		 */
+		if (depth != 1 || strcmp(uname, "memory@0") != 0)
+			return 0;
+	} else if (strcmp(type, "memory") != 0)
+		return 0;
+
+	reg = (cell_t *)of_get_flat_dt_prop(node, "linux,usable-memory", &l);
+	if (reg == NULL)
+		reg = (cell_t *)of_get_flat_dt_prop(node, "reg", &l);
+	if (reg == NULL)
+		return 0;
+
+	endp = reg + (l / sizeof(cell_t));
+
+	pr_debug("memory scan node %s, reg size %ld, data: %x %x %x %x,\n",
+		uname, l, reg[0], reg[1], reg[2], reg[3]);
+
+	while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
+		u64 base, size;
+
+		base = dt_mem_next_cell(dt_root_addr_cells, &reg);
+		size = dt_mem_next_cell(dt_root_size_cells, &reg);
+
+		if (size == 0)
+			continue;
+		pr_debug(" - %llx ,  %llx\n", (unsigned long long)base,
+			(unsigned long long)size);
+
+		lmb_add(base, size);
+	}
+	return 0;
+}
+
+#ifdef CONFIG_PHYP_DUMP
+/**
+ * phyp_dump_calculate_reserve_size() - reserve variable boot area 5% or arg
+ *
+ * Function to find the largest size we need to reserve
+ * during early boot process.
+ *
+ * It either looks for boot param and returns that OR
+ * returns larger of 256 or 5% rounded down to multiples of 256MB.
+ *
+ */
+static inline unsigned long phyp_dump_calculate_reserve_size(void)
+{
+	unsigned long tmp;
+
+	if (phyp_dump_info->reserve_bootvar)
+		return phyp_dump_info->reserve_bootvar;
+
+	/* divide by 20 to get 5% of value */
+	tmp = lmb_end_of_DRAM();
+	do_div(tmp, 20);
+
+	/* round it down in multiples of 256 */
+	tmp = tmp & ~0x0FFFFFFFUL;
+
+	return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END);
+}
+
+/**
+ * phyp_dump_reserve_mem() - reserve all not-yet-dumped mmemory
+ *
+ * This routine may reserve memory regions in the kernel only
+ * if the system is supported and a dump was taken in last
+ * boot instance or if the hardware is supported and the
+ * scratch area needs to be setup. In other instances it returns
+ * without reserving anything. The memory in case of dump being
+ * active is freed when the dump is collected (by userland tools).
+ */
+static void __init phyp_dump_reserve_mem(void)
+{
+	unsigned long base, size;
+	unsigned long variable_reserve_size;
+
+	if (!phyp_dump_info->phyp_dump_configured) {
+		printk(KERN_ERR "Phyp-dump not supported on this hardware\n");
+		return;
+	}
+
+	if (!phyp_dump_info->phyp_dump_at_boot) {
+		printk(KERN_INFO "Phyp-dump disabled at boot time\n");
+		return;
+	}
+
+	variable_reserve_size = phyp_dump_calculate_reserve_size();
+
+	if (phyp_dump_info->phyp_dump_is_active) {
+		/* Reserve *everything* above RMR.Area freed by userland tools*/
+		base = variable_reserve_size;
+		size = lmb_end_of_DRAM() - base;
+
+		/* XXX crashed_ram_end is wrong, since it may be beyond
+		 * the memory_limit, it will need to be adjusted. */
+		lmb_reserve(base, size);
+
+		phyp_dump_info->init_reserve_start = base;
+		phyp_dump_info->init_reserve_size = size;
+	} else {
+		size = phyp_dump_info->cpu_state_size +
+			phyp_dump_info->hpte_region_size +
+			variable_reserve_size;
+		base = lmb_end_of_DRAM() - size;
+		lmb_reserve(base, size);
+		phyp_dump_info->init_reserve_start = base;
+		phyp_dump_info->init_reserve_size = size;
+	}
+}
+#else
+static inline void __init phyp_dump_reserve_mem(void) {}
+#endif /* CONFIG_PHYP_DUMP  && CONFIG_PPC_RTAS */
+
+#ifdef CONFIG_EARLY_PRINTK
+/* MS this is Microblaze specifig function */
+static int __init early_init_dt_scan_serial(unsigned long node,
+				const char *uname, int depth, void *data)
+{
+	unsigned long l;
+	char *p;
+	int *addr;
+
+	pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
+
+/* find all serial nodes */
+	if (strncmp(uname, "serial", 6) != 0)
+		return 0;
+
+	early_init_dt_check_for_initrd(node);
+
+/* find compatible node with uartlite */
+	p = of_get_flat_dt_prop(node, "compatible", &l);
+	if ((strncmp(p, "xlnx,xps-uartlite", 17) != 0) &&
+			(strncmp(p, "xlnx,opb-uartlite", 17) != 0))
+		return 0;
+
+	addr = of_get_flat_dt_prop(node, "reg", &l);
+	return *addr; /* return address */
+}
+
+/* this function is looking for early uartlite console - Microblaze specific */
+int __init early_uartlite_console(void)
+{
+	return of_scan_flat_dt(early_init_dt_scan_serial, NULL);
+}
+#endif
+
+void __init early_init_devtree(void *params)
+{
+	pr_debug(" -> early_init_devtree(%p)\n", params);
+
+	/* Setup flat device-tree pointer */
+	initial_boot_params = params;
+
+#ifdef CONFIG_PHYP_DUMP
+	/* scan tree to see if dump occured during last boot */
+	of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL);
+#endif
+
+	/* Retrieve various informations from the /chosen node of the
+	 * device-tree, including the platform type, initrd location and
+	 * size, TCE reserve, and more ...
+	 */
+	of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
+
+	/* Scan memory nodes and rebuild LMBs */
+	lmb_init();
+	of_scan_flat_dt(early_init_dt_scan_root, NULL);
+	of_scan_flat_dt(early_init_dt_scan_memory, NULL);
+
+	/* Save command line for /proc/cmdline and then parse parameters */
+	strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);
+	parse_early_param();
+
+	lmb_analyze();
+
+	pr_debug("Phys. mem: %lx\n", (unsigned long) lmb_phys_mem_size());
+
+	pr_debug("Scanning CPUs ...\n");
+
+	/* Retreive CPU related informations from the flat tree
+	 * (altivec support, boot CPU ID, ...)
+	 */
+	of_scan_flat_dt(early_init_dt_scan_cpus, NULL);
+
+	pr_debug(" <- early_init_devtree()\n");
+}
+
+/**
+ * Indicates whether the root node has a given value in its
+ * compatible property.
+ */
+int machine_is_compatible(const char *compat)
+{
+	struct device_node *root;
+	int rc = 0;
+
+	root = of_find_node_by_path("/");
+	if (root) {
+		rc = of_device_is_compatible(root, compat);
+		of_node_put(root);
+	}
+	return rc;
+}
+EXPORT_SYMBOL(machine_is_compatible);
+
+/*******
+ *
+ * New implementation of the OF "find" APIs, return a refcounted
+ * object, call of_node_put() when done.  The device tree and list
+ * are protected by a rw_lock.
+ *
+ * Note that property management will need some locking as well,
+ * this isn't dealt with yet.
+ *
+ *******/
+
+/**
+ *	of_find_node_by_phandle - Find a node given a phandle
+ *	@handle:	phandle of the node to find
+ *
+ *	Returns a node pointer with refcount incremented, use
+ *	of_node_put() on it when done.
+ */
+struct device_node *of_find_node_by_phandle(phandle handle)
+{
+	struct device_node *np;
+
+	read_lock(&devtree_lock);
+	for (np = allnodes; np != NULL; np = np->allnext)
+		if (np->linux_phandle == handle)
+			break;
+	of_node_get(np);
+	read_unlock(&devtree_lock);
+	return np;
+}
+EXPORT_SYMBOL(of_find_node_by_phandle);
+
+/**
+ *	of_find_all_nodes - Get next node in global list
+ *	@prev:	Previous node or NULL to start iteration
+ *		of_node_put() will be called on it
+ *
+ *	Returns a node pointer with refcount incremented, use
+ *	of_node_put() on it when done.
+ */
+struct device_node *of_find_all_nodes(struct device_node *prev)
+{
+	struct device_node *np;
+
+	read_lock(&devtree_lock);
+	np = prev ? prev->allnext : allnodes;
+	for (; np != NULL; np = np->allnext)
+		if (of_node_get(np))
+			break;
+	of_node_put(prev);
+	read_unlock(&devtree_lock);
+	return np;
+}
+EXPORT_SYMBOL(of_find_all_nodes);
+
+/**
+ *	of_node_get - Increment refcount of a node
+ *	@node:	Node to inc refcount, NULL is supported to
+ *		simplify writing of callers
+ *
+ *	Returns node.
+ */
+struct device_node *of_node_get(struct device_node *node)
+{
+	if (node)
+		kref_get(&node->kref);
+	return node;
+}
+EXPORT_SYMBOL(of_node_get);
+
+static inline struct device_node *kref_to_device_node(struct kref *kref)
+{
+	return container_of(kref, struct device_node, kref);
+}
+
+/**
+ *	of_node_release - release a dynamically allocated node
+ *	@kref:  kref element of the node to be released
+ *
+ *	In of_node_put() this function is passed to kref_put()
+ *	as the destructor.
+ */
+static void of_node_release(struct kref *kref)
+{
+	struct device_node *node = kref_to_device_node(kref);
+	struct property *prop = node->properties;
+
+	/* We should never be releasing nodes that haven't been detached. */
+	if (!of_node_check_flag(node, OF_DETACHED)) {
+		printk(KERN_INFO "WARNING: Bad of_node_put() on %s\n",
+			node->full_name);
+		dump_stack();
+		kref_init(&node->kref);
+		return;
+	}
+
+	if (!of_node_check_flag(node, OF_DYNAMIC))
+		return;
+
+	while (prop) {
+		struct property *next = prop->next;
+		kfree(prop->name);
+		kfree(prop->value);
+		kfree(prop);
+		prop = next;
+
+		if (!prop) {
+			prop = node->deadprops;
+			node->deadprops = NULL;
+		}
+	}
+	kfree(node->full_name);
+	kfree(node->data);
+	kfree(node);
+}
+
+/**
+ *	of_node_put - Decrement refcount of a node
+ *	@node:	Node to dec refcount, NULL is supported to
+ *		simplify writing of callers
+ *
+ */
+void of_node_put(struct device_node *node)
+{
+	if (node)
+		kref_put(&node->kref, of_node_release);
+}
+EXPORT_SYMBOL(of_node_put);
+
+/*
+ * Plug a device node into the tree and global list.
+ */
+void of_attach_node(struct device_node *np)
+{
+	unsigned long flags;
+
+	write_lock_irqsave(&devtree_lock, flags);
+	np->sibling = np->parent->child;
+	np->allnext = allnodes;
+	np->parent->child = np;
+	allnodes = np;
+	write_unlock_irqrestore(&devtree_lock, flags);
+}
+
+/*
+ * "Unplug" a node from the device tree.  The caller must hold
+ * a reference to the node.  The memory associated with the node
+ * is not freed until its refcount goes to zero.
+ */
+void of_detach_node(struct device_node *np)
+{
+	struct device_node *parent;
+	unsigned long flags;
+
+	write_lock_irqsave(&devtree_lock, flags);
+
+	parent = np->parent;
+	if (!parent)
+		goto out_unlock;
+
+	if (allnodes == np)
+		allnodes = np->allnext;
+	else {
+		struct device_node *prev;
+		for (prev = allnodes;
+		     prev->allnext != np;
+		     prev = prev->allnext)
+			;
+		prev->allnext = np->allnext;
+	}
+
+	if (parent->child == np)
+		parent->child = np->sibling;
+	else {
+		struct device_node *prevsib;
+		for (prevsib = np->parent->child;
+		     prevsib->sibling != np;
+		     prevsib = prevsib->sibling)
+			;
+		prevsib->sibling = np->sibling;
+	}
+
+	of_node_set_flag(np, OF_DETACHED);
+
+out_unlock:
+	write_unlock_irqrestore(&devtree_lock, flags);
+}
+
+/*
+ * Add a property to a node
+ */
+int prom_add_property(struct device_node *np, struct property *prop)
+{
+	struct property **next;
+	unsigned long flags;
+
+	prop->next = NULL;
+	write_lock_irqsave(&devtree_lock, flags);
+	next = &np->properties;
+	while (*next) {
+		if (strcmp(prop->name, (*next)->name) == 0) {
+			/* duplicate ! don't insert it */
+			write_unlock_irqrestore(&devtree_lock, flags);
+			return -1;
+		}
+		next = &(*next)->next;
+	}
+	*next = prop;
+	write_unlock_irqrestore(&devtree_lock, flags);
+
+#ifdef CONFIG_PROC_DEVICETREE
+	/* try to add to proc as well if it was initialized */
+	if (np->pde)
+		proc_device_tree_add_prop(np->pde, prop);
+#endif /* CONFIG_PROC_DEVICETREE */
+
+	return 0;
+}
+
+/*
+ * Remove a property from a node.  Note that we don't actually
+ * remove it, since we have given out who-knows-how-many pointers
+ * to the data using get-property.  Instead we just move the property
+ * to the "dead properties" list, so it won't be found any more.
+ */
+int prom_remove_property(struct device_node *np, struct property *prop)
+{
+	struct property **next;
+	unsigned long flags;
+	int found = 0;
+
+	write_lock_irqsave(&devtree_lock, flags);
+	next = &np->properties;
+	while (*next) {
+		if (*next == prop) {
+			/* found the node */
+			*next = prop->next;
+			prop->next = np->deadprops;
+			np->deadprops = prop;
+			found = 1;
+			break;
+		}
+		next = &(*next)->next;
+	}
+	write_unlock_irqrestore(&devtree_lock, flags);
+
+	if (!found)
+		return -ENODEV;
+
+#ifdef CONFIG_PROC_DEVICETREE
+	/* try to remove the proc node as well */
+	if (np->pde)
+		proc_device_tree_remove_prop(np->pde, prop);
+#endif /* CONFIG_PROC_DEVICETREE */
+
+	return 0;
+}
+
+/*
+ * Update a property in a node.  Note that we don't actually
+ * remove it, since we have given out who-knows-how-many pointers
+ * to the data using get-property.  Instead we just move the property
+ * to the "dead properties" list, and add the new property to the
+ * property list
+ */
+int prom_update_property(struct device_node *np,
+			 struct property *newprop,
+			 struct property *oldprop)
+{
+	struct property **next;
+	unsigned long flags;
+	int found = 0;
+
+	write_lock_irqsave(&devtree_lock, flags);
+	next = &np->properties;
+	while (*next) {
+		if (*next == oldprop) {
+			/* found the node */
+			newprop->next = oldprop->next;
+			*next = newprop;
+			oldprop->next = np->deadprops;
+			np->deadprops = oldprop;
+			found = 1;
+			break;
+		}
+		next = &(*next)->next;
+	}
+	write_unlock_irqrestore(&devtree_lock, flags);
+
+	if (!found)
+		return -ENODEV;
+
+#ifdef CONFIG_PROC_DEVICETREE
+	/* try to add to proc as well if it was initialized */
+	if (np->pde)
+		proc_device_tree_update_prop(np->pde, newprop, oldprop);
+#endif /* CONFIG_PROC_DEVICETREE */
+
+	return 0;
+}
+
+#if defined(CONFIG_DEBUG_FS) && defined(DEBUG)
+static struct debugfs_blob_wrapper flat_dt_blob;
+
+static int __init export_flat_device_tree(void)
+{
+	struct dentry *d;
+
+	flat_dt_blob.data = initial_boot_params;
+	flat_dt_blob.size = initial_boot_params->totalsize;
+
+	d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR,
+				of_debugfs_root, &flat_dt_blob);
+	if (!d)
+		return 1;
+
+	return 0;
+}
+device_initcall(export_flat_device_tree);
+#endif
diff --git a/arch/microblaze/kernel/prom_parse.c b/arch/microblaze/kernel/prom_parse.c
new file mode 100644
index 00000000000..ae0352ecd5a
--- /dev/null
+++ b/arch/microblaze/kernel/prom_parse.c
@@ -0,0 +1,1025 @@
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/pci_regs.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/etherdevice.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+
+#define PRu64	"%llx"
+
+/* Max address size we deal with */
+#define OF_MAX_ADDR_CELLS	4
+#define OF_CHECK_COUNTS(na, ns)	((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
+			(ns) > 0)
+
+static struct of_bus *of_match_bus(struct device_node *np);
+static int __of_address_to_resource(struct device_node *dev,
+		const u32 *addrp, u64 size, unsigned int flags,
+		struct resource *r);
+
+/* Debug utility */
+#ifdef DEBUG
+static void of_dump_addr(const char *s, const u32 *addr, int na)
+{
+	printk(KERN_INFO "%s", s);
+	while (na--)
+		printk(KERN_INFO " %08x", *(addr++));
+	printk(KERN_INFO "\n");
+}
+#else
+static void of_dump_addr(const char *s, const u32 *addr, int na) { }
+#endif
+
+/* Callbacks for bus specific translators */
+struct of_bus {
+	const char	*name;
+	const char	*addresses;
+	int		(*match)(struct device_node *parent);
+	void		(*count_cells)(struct device_node *child,
+					int *addrc, int *sizec);
+	u64		(*map)(u32 *addr, const u32 *range,
+				int na, int ns, int pna);
+	int		(*translate)(u32 *addr, u64 offset, int na);
+	unsigned int	(*get_flags)(const u32 *addr);
+};
+
+/*
+ * Default translator (generic bus)
+ */
+
+static void of_bus_default_count_cells(struct device_node *dev,
+					int *addrc, int *sizec)
+{
+	if (addrc)
+		*addrc = of_n_addr_cells(dev);
+	if (sizec)
+		*sizec = of_n_size_cells(dev);
+}
+
+static u64 of_bus_default_map(u32 *addr, const u32 *range,
+		int na, int ns, int pna)
+{
+	u64 cp, s, da;
+
+	cp = of_read_number(range, na);
+	s  = of_read_number(range + na + pna, ns);
+	da = of_read_number(addr, na);
+
+	pr_debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
+		cp, s, da);
+
+	if (da < cp || da >= (cp + s))
+		return OF_BAD_ADDR;
+	return da - cp;
+}
+
+static int of_bus_default_translate(u32 *addr, u64 offset, int na)
+{
+	u64 a = of_read_number(addr, na);
+	memset(addr, 0, na * 4);
+	a += offset;
+	if (na > 1)
+		addr[na - 2] = a >> 32;
+	addr[na - 1] = a & 0xffffffffu;
+
+	return 0;
+}
+
+static unsigned int of_bus_default_get_flags(const u32 *addr)
+{
+	return IORESOURCE_MEM;
+}
+
+#ifdef CONFIG_PCI
+/*
+ * PCI bus specific translator
+ */
+
+static int of_bus_pci_match(struct device_node *np)
+{
+	/* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
+	return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
+}
+
+static void of_bus_pci_count_cells(struct device_node *np,
+				int *addrc, int *sizec)
+{
+	if (addrc)
+		*addrc = 3;
+	if (sizec)
+		*sizec = 2;
+}
+
+static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
+{
+	u64 cp, s, da;
+
+	/* Check address type match */
+	if ((addr[0] ^ range[0]) & 0x03000000)
+		return OF_BAD_ADDR;
+
+	/* Read address values, skipping high cell */
+	cp = of_read_number(range + 1, na - 1);
+	s  = of_read_number(range + na + pna, ns);
+	da = of_read_number(addr + 1, na - 1);
+
+	pr_debug("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
+
+	if (da < cp || da >= (cp + s))
+		return OF_BAD_ADDR;
+	return da - cp;
+}
+
+static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
+{
+	return of_bus_default_translate(addr + 1, offset, na - 1);
+}
+
+static unsigned int of_bus_pci_get_flags(const u32 *addr)
+{
+	unsigned int flags = 0;
+	u32 w = addr[0];
+
+	switch ((w >> 24) & 0x03) {
+	case 0x01:
+		flags |= IORESOURCE_IO;
+		break;
+	case 0x02: /* 32 bits */
+	case 0x03: /* 64 bits */
+		flags |= IORESOURCE_MEM;
+		break;
+	}
+	if (w & 0x40000000)
+		flags |= IORESOURCE_PREFETCH;
+	return flags;
+}
+
+const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
+			unsigned int *flags)
+{
+	const u32 *prop;
+	unsigned int psize;
+	struct device_node *parent;
+	struct of_bus *bus;
+	int onesize, i, na, ns;
+
+	/* Get parent & match bus type */
+	parent = of_get_parent(dev);
+	if (parent == NULL)
+		return NULL;
+	bus = of_match_bus(parent);
+	if (strcmp(bus->name, "pci")) {
+		of_node_put(parent);
+		return NULL;
+	}
+	bus->count_cells(dev, &na, &ns);
+	of_node_put(parent);
+	if (!OF_CHECK_COUNTS(na, ns))
+		return NULL;
+
+	/* Get "reg" or "assigned-addresses" property */
+	prop = of_get_property(dev, bus->addresses, &psize);
+	if (prop == NULL)
+		return NULL;
+	psize /= 4;
+
+	onesize = na + ns;
+	for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
+		if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
+			if (size)
+				*size = of_read_number(prop + na, ns);
+			if (flags)
+				*flags = bus->get_flags(prop);
+			return prop;
+		}
+	return NULL;
+}
+EXPORT_SYMBOL(of_get_pci_address);
+
+int of_pci_address_to_resource(struct device_node *dev, int bar,
+				struct resource *r)
+{
+	const u32	*addrp;
+	u64		size;
+	unsigned int	flags;
+
+	addrp = of_get_pci_address(dev, bar, &size, &flags);
+	if (addrp == NULL)
+		return -EINVAL;
+	return __of_address_to_resource(dev, addrp, size, flags, r);
+}
+EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
+
+static u8 of_irq_pci_swizzle(u8 slot, u8 pin)
+{
+	return (((pin - 1) + slot) % 4) + 1;
+}
+
+int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
+{
+	struct device_node *dn, *ppnode;
+	struct pci_dev *ppdev;
+	u32 lspec;
+	u32 laddr[3];
+	u8 pin;
+	int rc;
+
+	/* Check if we have a device node, if yes, fallback to standard OF
+	 * parsing
+	 */
+	dn = pci_device_to_OF_node(pdev);
+	if (dn)
+		return of_irq_map_one(dn, 0, out_irq);
+
+	/* Ok, we don't, time to have fun. Let's start by building up an
+	 * interrupt spec.  we assume #interrupt-cells is 1, which is standard
+	 * for PCI. If you do different, then don't use that routine.
+	 */
+	rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
+	if (rc != 0)
+		return rc;
+	/* No pin, exit */
+	if (pin == 0)
+		return -ENODEV;
+
+	/* Now we walk up the PCI tree */
+	lspec = pin;
+	for (;;) {
+		/* Get the pci_dev of our parent */
+		ppdev = pdev->bus->self;
+
+		/* Ouch, it's a host bridge... */
+		if (ppdev == NULL) {
+			struct pci_controller *host;
+			host = pci_bus_to_host(pdev->bus);
+			ppnode = host ? host->arch_data : NULL;
+			/* No node for host bridge ? give up */
+			if (ppnode == NULL)
+				return -EINVAL;
+		} else
+			/* We found a P2P bridge, check if it has a node */
+			ppnode = pci_device_to_OF_node(ppdev);
+
+		/* Ok, we have found a parent with a device-node, hand over to
+		 * the OF parsing code.
+		 * We build a unit address from the linux device to be used for
+		 * resolution. Note that we use the linux bus number which may
+		 * not match your firmware bus numbering.
+		 * Fortunately, in most cases, interrupt-map-mask doesn't
+		 * include the bus number as part of the matching.
+		 * You should still be careful about that though if you intend
+		 * to rely on this function (you ship  a firmware that doesn't
+		 * create device nodes for all PCI devices).
+		 */
+		if (ppnode)
+			break;
+
+		/* We can only get here if we hit a P2P bridge with no node,
+		 * let's do standard swizzling and try again
+		 */
+		lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec);
+		pdev = ppdev;
+	}
+
+	laddr[0] = (pdev->bus->number << 16)
+		| (pdev->devfn << 8);
+	laddr[1]  = laddr[2] = 0;
+	return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
+}
+EXPORT_SYMBOL_GPL(of_irq_map_pci);
+#endif /* CONFIG_PCI */
+
+/*
+ * ISA bus specific translator
+ */
+
+static int of_bus_isa_match(struct device_node *np)
+{
+	return !strcmp(np->name, "isa");
+}
+
+static void of_bus_isa_count_cells(struct device_node *child,
+				int *addrc, int *sizec)
+{
+	if (addrc)
+		*addrc = 2;
+	if (sizec)
+		*sizec = 1;
+}
+
+static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna)
+{
+	u64 cp, s, da;
+
+	/* Check address type match */
+	if ((addr[0] ^ range[0]) & 0x00000001)
+		return OF_BAD_ADDR;
+
+	/* Read address values, skipping high cell */
+	cp = of_read_number(range + 1, na - 1);
+	s  = of_read_number(range + na + pna, ns);
+	da = of_read_number(addr + 1, na - 1);
+
+	pr_debug("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
+
+	if (da < cp || da >= (cp + s))
+		return OF_BAD_ADDR;
+	return da - cp;
+}
+
+static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
+{
+	return of_bus_default_translate(addr + 1, offset, na - 1);
+}
+
+static unsigned int of_bus_isa_get_flags(const u32 *addr)
+{
+	unsigned int flags = 0;
+	u32 w = addr[0];
+
+	if (w & 1)
+		flags |= IORESOURCE_IO;
+	else
+		flags |= IORESOURCE_MEM;
+	return flags;
+}
+
+/*
+ * Array of bus specific translators
+ */
+
+static struct of_bus of_busses[] = {
+#ifdef CONFIG_PCI
+	/* PCI */
+	{
+		.name = "pci",
+		.addresses = "assigned-addresses",
+		.match = of_bus_pci_match,
+		.count_cells = of_bus_pci_count_cells,
+		.map = of_bus_pci_map,
+		.translate = of_bus_pci_translate,
+		.get_flags = of_bus_pci_get_flags,
+	},
+#endif /* CONFIG_PCI */
+	/* ISA */
+	{
+		.name = "isa",
+		.addresses = "reg",
+		.match = of_bus_isa_match,
+		.count_cells = of_bus_isa_count_cells,
+		.map = of_bus_isa_map,
+		.translate = of_bus_isa_translate,
+		.get_flags = of_bus_isa_get_flags,
+	},
+	/* Default */
+	{
+		.name = "default",
+		.addresses = "reg",
+		.match = NULL,
+		.count_cells = of_bus_default_count_cells,
+		.map = of_bus_default_map,
+		.translate = of_bus_default_translate,
+		.get_flags = of_bus_default_get_flags,
+	},
+};
+
+static struct of_bus *of_match_bus(struct device_node *np)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(of_busses); i++)
+		if (!of_busses[i].match || of_busses[i].match(np))
+			return &of_busses[i];
+	BUG();
+	return NULL;
+}
+
+static int of_translate_one(struct device_node *parent, struct of_bus *bus,
+			struct of_bus *pbus, u32 *addr,
+			int na, int ns, int pna)
+{
+	const u32 *ranges;
+	unsigned int rlen;
+	int rone;
+	u64 offset = OF_BAD_ADDR;
+
+	/* Normally, an absence of a "ranges" property means we are
+	 * crossing a non-translatable boundary, and thus the addresses
+	 * below the current not cannot be converted to CPU physical ones.
+	 * Unfortunately, while this is very clear in the spec, it's not
+	 * what Apple understood, and they do have things like /uni-n or
+	 * /ht nodes with no "ranges" property and a lot of perfectly
+	 * useable mapped devices below them. Thus we treat the absence of
+	 * "ranges" as equivalent to an empty "ranges" property which means
+	 * a 1:1 translation at that level. It's up to the caller not to try
+	 * to translate addresses that aren't supposed to be translated in
+	 * the first place. --BenH.
+	 */
+	ranges = of_get_property(parent, "ranges", (int *) &rlen);
+	if (ranges == NULL || rlen == 0) {
+		offset = of_read_number(addr, na);
+		memset(addr, 0, pna * 4);
+		pr_debug("OF: no ranges, 1:1 translation\n");
+		goto finish;
+	}
+
+	pr_debug("OF: walking ranges...\n");
+
+	/* Now walk through the ranges */
+	rlen /= 4;
+	rone = na + pna + ns;
+	for (; rlen >= rone; rlen -= rone, ranges += rone) {
+		offset = bus->map(addr, ranges, na, ns, pna);
+		if (offset != OF_BAD_ADDR)
+			break;
+	}
+	if (offset == OF_BAD_ADDR) {
+		pr_debug("OF: not found !\n");
+		return 1;
+	}
+	memcpy(addr, ranges + na, 4 * pna);
+
+ finish:
+	of_dump_addr("OF: parent translation for:", addr, pna);
+	pr_debug("OF: with offset: "PRu64"\n", offset);
+
+	/* Translate it into parent bus space */
+	return pbus->translate(addr, offset, pna);
+}
+
+/*
+ * Translate an address from the device-tree into a CPU physical address,
+ * this walks up the tree and applies the various bus mappings on the
+ * way.
+ *
+ * Note: We consider that crossing any level with #size-cells == 0 to mean
+ * that translation is impossible (that is we are not dealing with a value
+ * that can be mapped to a cpu physical address). This is not really specified
+ * that way, but this is traditionally the way IBM at least do things
+ */
+u64 of_translate_address(struct device_node *dev, const u32 *in_addr)
+{
+	struct device_node *parent = NULL;
+	struct of_bus *bus, *pbus;
+	u32 addr[OF_MAX_ADDR_CELLS];
+	int na, ns, pna, pns;
+	u64 result = OF_BAD_ADDR;
+
+	pr_debug("OF: ** translation for device %s **\n", dev->full_name);
+
+	/* Increase refcount at current level */
+	of_node_get(dev);
+
+	/* Get parent & match bus type */
+	parent = of_get_parent(dev);
+	if (parent == NULL)
+		goto bail;
+	bus = of_match_bus(parent);
+
+	/* Cound address cells & copy address locally */
+	bus->count_cells(dev, &na, &ns);
+	if (!OF_CHECK_COUNTS(na, ns)) {
+		printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
+			dev->full_name);
+		goto bail;
+	}
+	memcpy(addr, in_addr, na * 4);
+
+	pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
+		bus->name, na, ns, parent->full_name);
+	of_dump_addr("OF: translating address:", addr, na);
+
+	/* Translate */
+	for (;;) {
+		/* Switch to parent bus */
+		of_node_put(dev);
+		dev = parent;
+		parent = of_get_parent(dev);
+
+		/* If root, we have finished */
+		if (parent == NULL) {
+			pr_debug("OF: reached root node\n");
+			result = of_read_number(addr, na);
+			break;
+		}
+
+		/* Get new parent bus and counts */
+		pbus = of_match_bus(parent);
+		pbus->count_cells(dev, &pna, &pns);
+		if (!OF_CHECK_COUNTS(pna, pns)) {
+			printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
+				dev->full_name);
+			break;
+		}
+
+		pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
+			pbus->name, pna, pns, parent->full_name);
+
+		/* Apply bus translation */
+		if (of_translate_one(dev, bus, pbus, addr, na, ns, pna))
+			break;
+
+		/* Complete the move up one level */
+		na = pna;
+		ns = pns;
+		bus = pbus;
+
+		of_dump_addr("OF: one level translation:", addr, na);
+	}
+ bail:
+	of_node_put(parent);
+	of_node_put(dev);
+
+	return result;
+}
+EXPORT_SYMBOL(of_translate_address);
+
+const u32 *of_get_address(struct device_node *dev, int index, u64 *size,
+			unsigned int *flags)
+{
+	const u32 *prop;
+	unsigned int psize;
+	struct device_node *parent;
+	struct of_bus *bus;
+	int onesize, i, na, ns;
+
+	/* Get parent & match bus type */
+	parent = of_get_parent(dev);
+	if (parent == NULL)
+		return NULL;
+	bus = of_match_bus(parent);
+	bus->count_cells(dev, &na, &ns);
+	of_node_put(parent);
+	if (!OF_CHECK_COUNTS(na, ns))
+		return NULL;
+
+	/* Get "reg" or "assigned-addresses" property */
+	prop = of_get_property(dev, bus->addresses, (int *) &psize);
+	if (prop == NULL)
+		return NULL;
+	psize /= 4;
+
+	onesize = na + ns;
+	for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
+		if (i == index) {
+			if (size)
+				*size = of_read_number(prop + na, ns);
+			if (flags)
+				*flags = bus->get_flags(prop);
+			return prop;
+		}
+	return NULL;
+}
+EXPORT_SYMBOL(of_get_address);
+
+static int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
+				u64 size, unsigned int flags,
+				struct resource *r)
+{
+	u64 taddr;
+
+	if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
+		return -EINVAL;
+	taddr = of_translate_address(dev, addrp);
+	if (taddr == OF_BAD_ADDR)
+		return -EINVAL;
+	memset(r, 0, sizeof(struct resource));
+	if (flags & IORESOURCE_IO) {
+		unsigned long port;
+		port = -1; /* pci_address_to_pio(taddr); */
+		if (port == (unsigned long)-1)
+			return -EINVAL;
+		r->start = port;
+		r->end = port + size - 1;
+	} else {
+		r->start = taddr;
+		r->end = taddr + size - 1;
+	}
+	r->flags = flags;
+	r->name = dev->name;
+	return 0;
+}
+
+int of_address_to_resource(struct device_node *dev, int index,
+			struct resource *r)
+{
+	const u32	*addrp;
+	u64		size;
+	unsigned int	flags;
+
+	addrp = of_get_address(dev, index, &size, &flags);
+	if (addrp == NULL)
+		return -EINVAL;
+	return __of_address_to_resource(dev, addrp, size, flags, r);
+}
+EXPORT_SYMBOL_GPL(of_address_to_resource);
+
+void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
+		unsigned long *busno, unsigned long *phys, unsigned long *size)
+{
+	const u32 *dma_window;
+	u32 cells;
+	const unsigned char *prop;
+
+	dma_window = dma_window_prop;
+
+	/* busno is always one cell */
+	*busno = *(dma_window++);
+
+	prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
+	if (!prop)
+		prop = of_get_property(dn, "#address-cells", NULL);
+
+	cells = prop ? *(u32 *)prop : of_n_addr_cells(dn);
+	*phys = of_read_number(dma_window, cells);
+
+	dma_window += cells;
+
+	prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
+	cells = prop ? *(u32 *)prop : of_n_size_cells(dn);
+	*size = of_read_number(dma_window, cells);
+}
+
+/*
+ * Interrupt remapper
+ */
+
+static unsigned int of_irq_workarounds;
+static struct device_node *of_irq_dflt_pic;
+
+static struct device_node *of_irq_find_parent(struct device_node *child)
+{
+	struct device_node *p;
+	const phandle *parp;
+
+	if (!of_node_get(child))
+		return NULL;
+
+	do {
+		parp = of_get_property(child, "interrupt-parent", NULL);
+		if (parp == NULL)
+			p = of_get_parent(child);
+		else {
+			if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
+				p = of_node_get(of_irq_dflt_pic);
+			else
+				p = of_find_node_by_phandle(*parp);
+		}
+		of_node_put(child);
+		child = p;
+	} while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
+
+	return p;
+}
+
+/* This doesn't need to be called if you don't have any special workaround
+ * flags to pass
+ */
+void of_irq_map_init(unsigned int flags)
+{
+	of_irq_workarounds = flags;
+
+	/* OldWorld, don't bother looking at other things */
+	if (flags & OF_IMAP_OLDWORLD_MAC)
+		return;
+
+	/* If we don't have phandles, let's try to locate a default interrupt
+	 * controller (happens when booting with BootX). We do a first match
+	 * here, hopefully, that only ever happens on machines with one
+	 * controller.
+	 */
+	if (flags & OF_IMAP_NO_PHANDLE) {
+		struct device_node *np;
+
+		for (np = NULL; (np = of_find_all_nodes(np)) != NULL;) {
+			if (of_get_property(np, "interrupt-controller", NULL)
+				== NULL)
+				continue;
+			/* Skip /chosen/interrupt-controller */
+			if (strcmp(np->name, "chosen") == 0)
+				continue;
+			/* It seems like at least one person on this planet
+			 * wants to use BootX on a machine with an AppleKiwi
+			 * controller which happens to pretend to be an
+			 * interrupt controller too.
+			 */
+			if (strcmp(np->name, "AppleKiwi") == 0)
+				continue;
+			/* I think we found one ! */
+			of_irq_dflt_pic = np;
+			break;
+		}
+	}
+
+}
+
+int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
+		const u32 *addr, struct of_irq *out_irq)
+{
+	struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
+	const u32 *tmp, *imap, *imask;
+	u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
+	int imaplen, match, i;
+
+	pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],"
+		"ointsize=%d\n",
+		parent->full_name, intspec[0], intspec[1], ointsize);
+
+	ipar = of_node_get(parent);
+
+	/* First get the #interrupt-cells property of the current cursor
+	 * that tells us how to interpret the passed-in intspec. If there
+	 * is none, we are nice and just walk up the tree
+	 */
+	do {
+		tmp = of_get_property(ipar, "#interrupt-cells", NULL);
+		if (tmp != NULL) {
+			intsize = *tmp;
+			break;
+		}
+		tnode = ipar;
+		ipar = of_irq_find_parent(ipar);
+		of_node_put(tnode);
+	} while (ipar);
+	if (ipar == NULL) {
+		pr_debug(" -> no parent found !\n");
+		goto fail;
+	}
+
+	pr_debug("of_irq_map_raw: ipar=%s, size=%d\n",
+			ipar->full_name, intsize);
+
+	if (ointsize != intsize)
+		return -EINVAL;
+
+	/* Look for this #address-cells. We have to implement the old linux
+	 * trick of looking for the parent here as some device-trees rely on it
+	 */
+	old = of_node_get(ipar);
+	do {
+		tmp = of_get_property(old, "#address-cells", NULL);
+		tnode = of_get_parent(old);
+		of_node_put(old);
+		old = tnode;
+	} while (old && tmp == NULL);
+	of_node_put(old);
+	old = NULL;
+	addrsize = (tmp == NULL) ? 2 : *tmp;
+
+	pr_debug(" -> addrsize=%d\n", addrsize);
+
+	/* Now start the actual "proper" walk of the interrupt tree */
+	while (ipar != NULL) {
+		/* Now check if cursor is an interrupt-controller and if it is
+		 * then we are done
+		 */
+		if (of_get_property(ipar, "interrupt-controller", NULL) !=
+				NULL) {
+			pr_debug(" -> got it !\n");
+			memcpy(out_irq->specifier, intspec,
+				intsize * sizeof(u32));
+			out_irq->size = intsize;
+			out_irq->controller = ipar;
+			of_node_put(old);
+			return 0;
+		}
+
+		/* Now look for an interrupt-map */
+		imap = of_get_property(ipar, "interrupt-map", &imaplen);
+		/* No interrupt map, check for an interrupt parent */
+		if (imap == NULL) {
+			pr_debug(" -> no map, getting parent\n");
+			newpar = of_irq_find_parent(ipar);
+			goto skiplevel;
+		}
+		imaplen /= sizeof(u32);
+
+		/* Look for a mask */
+		imask = of_get_property(ipar, "interrupt-map-mask", NULL);
+
+		/* If we were passed no "reg" property and we attempt to parse
+		 * an interrupt-map, then #address-cells must be 0.
+		 * Fail if it's not.
+		 */
+		if (addr == NULL && addrsize != 0) {
+			pr_debug(" -> no reg passed in when needed !\n");
+			goto fail;
+		}
+
+		/* Parse interrupt-map */
+		match = 0;
+		while (imaplen > (addrsize + intsize + 1) && !match) {
+			/* Compare specifiers */
+			match = 1;
+			for (i = 0; i < addrsize && match; ++i) {
+				u32 mask = imask ? imask[i] : 0xffffffffu;
+				match = ((addr[i] ^ imap[i]) & mask) == 0;
+			}
+			for (; i < (addrsize + intsize) && match; ++i) {
+				u32 mask = imask ? imask[i] : 0xffffffffu;
+				match =
+					((intspec[i-addrsize] ^ imap[i])
+						& mask) == 0;
+			}
+			imap += addrsize + intsize;
+			imaplen -= addrsize + intsize;
+
+			pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen);
+
+			/* Get the interrupt parent */
+			if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
+				newpar = of_node_get(of_irq_dflt_pic);
+			else
+				newpar =
+					of_find_node_by_phandle((phandle)*imap);
+			imap++;
+			--imaplen;
+
+			/* Check if not found */
+			if (newpar == NULL) {
+				pr_debug(" -> imap parent not found !\n");
+				goto fail;
+			}
+
+			/* Get #interrupt-cells and #address-cells of new
+			 * parent
+			 */
+			tmp = of_get_property(newpar, "#interrupt-cells", NULL);
+			if (tmp == NULL) {
+				pr_debug(" -> parent lacks "
+						"#interrupt-cells!\n");
+				goto fail;
+			}
+			newintsize = *tmp;
+			tmp = of_get_property(newpar, "#address-cells", NULL);
+			newaddrsize = (tmp == NULL) ? 0 : *tmp;
+
+			pr_debug(" -> newintsize=%d, newaddrsize=%d\n",
+				newintsize, newaddrsize);
+
+			/* Check for malformed properties */
+			if (imaplen < (newaddrsize + newintsize))
+				goto fail;
+
+			imap += newaddrsize + newintsize;
+			imaplen -= newaddrsize + newintsize;
+
+			pr_debug(" -> imaplen=%d\n", imaplen);
+		}
+		if (!match)
+			goto fail;
+
+		of_node_put(old);
+		old = of_node_get(newpar);
+		addrsize = newaddrsize;
+		intsize = newintsize;
+		intspec = imap - intsize;
+		addr = intspec - addrsize;
+
+skiplevel:
+		/* Iterate again with new parent */
+		pr_debug(" -> new parent: %s\n",
+				newpar ? newpar->full_name : "<>");
+		of_node_put(ipar);
+		ipar = newpar;
+		newpar = NULL;
+	}
+fail:
+	of_node_put(ipar);
+	of_node_put(old);
+	of_node_put(newpar);
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(of_irq_map_raw);
+
+int of_irq_map_one(struct device_node *device,
+			int index, struct of_irq *out_irq)
+{
+	struct device_node *p;
+	const u32 *intspec, *tmp, *addr;
+	u32 intsize, intlen;
+	int res;
+
+	pr_debug("of_irq_map_one: dev=%s, index=%d\n",
+			device->full_name, index);
+
+	/* Get the interrupts property */
+	intspec = of_get_property(device, "interrupts", (int *) &intlen);
+	if (intspec == NULL)
+		return -EINVAL;
+	intlen /= sizeof(u32);
+
+	pr_debug(" intspec=%d intlen=%d\n", *intspec, intlen);
+
+	/* Get the reg property (if any) */
+	addr = of_get_property(device, "reg", NULL);
+
+	/* Look for the interrupt parent. */
+	p = of_irq_find_parent(device);
+	if (p == NULL)
+		return -EINVAL;
+
+	/* Get size of interrupt specifier */
+	tmp = of_get_property(p, "#interrupt-cells", NULL);
+	if (tmp == NULL) {
+		of_node_put(p);
+		return -EINVAL;
+	}
+	intsize = *tmp;
+
+	pr_debug(" intsize=%d intlen=%d\n", intsize, intlen);
+
+	/* Check index */
+	if ((index + 1) * intsize > intlen)
+		return -EINVAL;
+
+	/* Get new specifier and map it */
+	res = of_irq_map_raw(p, intspec + index * intsize, intsize,
+				addr, out_irq);
+	of_node_put(p);
+	return res;
+}
+EXPORT_SYMBOL_GPL(of_irq_map_one);
+
+/**
+ * Search the device tree for the best MAC address to use.  'mac-address' is
+ * checked first, because that is supposed to contain to "most recent" MAC
+ * address. If that isn't set, then 'local-mac-address' is checked next,
+ * because that is the default address.  If that isn't set, then the obsolete
+ * 'address' is checked, just in case we're using an old device tree.
+ *
+ * Note that the 'address' property is supposed to contain a virtual address of
+ * the register set, but some DTS files have redefined that property to be the
+ * MAC address.
+ *
+ * All-zero MAC addresses are rejected, because those could be properties that
+ * exist in the device tree, but were not set by U-Boot.  For example, the
+ * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
+ * addresses.  Some older U-Boots only initialized 'local-mac-address'.  In
+ * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
+ * but is all zeros.
+*/
+const void *of_get_mac_address(struct device_node *np)
+{
+	struct property *pp;
+
+	pp = of_find_property(np, "mac-address", NULL);
+	if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
+		return pp->value;
+
+	pp = of_find_property(np, "local-mac-address", NULL);
+	if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
+		return pp->value;
+
+	pp = of_find_property(np, "address", NULL);
+	if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
+		return pp->value;
+
+	return NULL;
+}
+EXPORT_SYMBOL(of_get_mac_address);
+
+int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
+{
+	struct of_irq out_irq;
+	int irq;
+	int res;
+
+	res = of_irq_map_one(dev, index, &out_irq);
+
+	/* Get irq for the device */
+	if (res) {
+		pr_debug("IRQ not found... code = %d", res);
+		return NO_IRQ;
+	}
+	/* Assuming single interrupt controller... */
+	irq = out_irq.specifier[0];
+
+	pr_debug("IRQ found = %d", irq);
+
+	/* Only dereference the resource if both the
+	 * resource and the irq are valid. */
+	if (r && irq != NO_IRQ) {
+		r->start = r->end = irq;
+		r->flags = IORESOURCE_IRQ;
+	}
+
+	return irq;
+}
+EXPORT_SYMBOL_GPL(of_irq_to_resource);
+
+void __iomem *of_iomap(struct device_node *np, int index)
+{
+	struct resource res;
+
+	if (of_address_to_resource(np, index, &res))
+		return NULL;
+
+	return ioremap(res.start, 1 + res.end - res.start);
+}
+EXPORT_SYMBOL(of_iomap);
diff --git a/arch/microblaze/kernel/ptrace.c b/arch/microblaze/kernel/ptrace.c
new file mode 100644
index 00000000000..b86aa623e36
--- /dev/null
+++ b/arch/microblaze/kernel/ptrace.c
@@ -0,0 +1,181 @@
+/*
+ * `ptrace' system call
+ *
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2004-2007 John Williams <john.williams@petalogix.com>
+ *
+ * derived from arch/v850/kernel/ptrace.c
+ *
+ * Copyright (C) 2002,03 NEC Electronics Corporation
+ * Copyright (C) 2002,03 Miles Bader <miles@gnu.org>
+ *
+ * Derived from arch/mips/kernel/ptrace.c:
+ *
+ * Copyright (C) 1992 Ross Biro
+ * Copyright (C) Linus Torvalds
+ * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle
+ * Copyright (C) 1996 David S. Miller
+ * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999 MIPS Technologies, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file COPYING in the main directory of this
+ * archive for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
+#include <linux/ptrace.h>
+#include <linux/signal.h>
+
+#include <linux/errno.h>
+#include <asm/processor.h>
+#include <linux/uaccess.h>
+#include <asm/asm-offsets.h>
+
+/* Returns the address where the register at REG_OFFS in P is stashed away. */
+static microblaze_reg_t *reg_save_addr(unsigned reg_offs,
+					struct task_struct *t)
+{
+	struct pt_regs *regs;
+
+	/*
+	 * Three basic cases:
+	 *
+	 * (1)	A register normally saved before calling the scheduler, is
+	 *	available in the kernel entry pt_regs structure at the top
+	 *	of the kernel stack. The kernel trap/irq exit path takes
+	 *	care to save/restore almost all registers for ptrace'd
+	 *	processes.
+	 *
+	 * (2)	A call-clobbered register, where the process P entered the
+	 *	kernel via [syscall] trap, is not stored anywhere; that's
+	 *	OK, because such registers are not expected to be preserved
+	 *	when the trap returns anyway (so we don't actually bother to
+	 *	test for this case).
+	 *
+	 * (3)	A few registers not used at all by the kernel, and so
+	 *	normally never saved except by context-switches, are in the
+	 *	context switch state.
+	 */
+
+	/* Register saved during kernel entry (or not available). */
+	regs = task_pt_regs(t);
+
+	return (microblaze_reg_t *)((char *)regs + reg_offs);
+}
+
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
+{
+	int rval;
+	unsigned long val = 0;
+	unsigned long copied;
+
+	switch (request) {
+	case PTRACE_PEEKTEXT: /* read word at location addr. */
+	case PTRACE_PEEKDATA:
+		pr_debug("PEEKTEXT/PEEKDATA at %08lX\n", addr);
+		copied = access_process_vm(child, addr, &val, sizeof(val), 0);
+		rval = -EIO;
+		if (copied != sizeof(val))
+			break;
+		rval = put_user(val, (unsigned long *)data);
+		break;
+
+	case PTRACE_POKETEXT: /* write the word at location addr. */
+	case PTRACE_POKEDATA:
+		pr_debug("POKETEXT/POKEDATA to %08lX\n", addr);
+		rval = 0;
+		if (access_process_vm(child, addr, &data, sizeof(data), 1)
+		    == sizeof(data))
+			break;
+		rval = -EIO;
+		break;
+
+	/* Read/write the word at location ADDR in the registers. */
+	case PTRACE_PEEKUSR:
+	case PTRACE_POKEUSR:
+		pr_debug("PEEKUSR/POKEUSR : 0x%08lx\n", addr);
+		rval = 0;
+		if (addr >= PT_SIZE && request == PTRACE_PEEKUSR) {
+			/*
+			 * Special requests that don't actually correspond
+			 * to offsets in struct pt_regs.
+			 */
+			if (addr == PT_TEXT_ADDR) {
+				val = child->mm->start_code;
+			} else if (addr == PT_DATA_ADDR) {
+				val = child->mm->start_data;
+			} else if (addr == PT_TEXT_LEN) {
+				val = child->mm->end_code
+					- child->mm->start_code;
+			} else {
+				rval = -EIO;
+			}
+		} else if (addr >= 0 && addr < PT_SIZE && (addr & 0x3) == 0) {
+			microblaze_reg_t *reg_addr = reg_save_addr(addr, child);
+			if (request == PTRACE_PEEKUSR)
+				val = *reg_addr;
+			else
+				*reg_addr = data;
+		} else
+			rval = -EIO;
+
+		if (rval == 0 && request == PTRACE_PEEKUSR)
+			rval = put_user(val, (unsigned long *)data);
+		break;
+	/* Continue and stop at next (return from) syscall */
+	case PTRACE_SYSCALL:
+		pr_debug("PTRACE_SYSCALL\n");
+	case PTRACE_SINGLESTEP:
+		pr_debug("PTRACE_SINGLESTEP\n");
+	/* Restart after a signal.  */
+	case PTRACE_CONT:
+		pr_debug("PTRACE_CONT\n");
+		rval = -EIO;
+		if (!valid_signal(data))
+			break;
+
+		if (request == PTRACE_SYSCALL)
+			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+		else
+			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+
+		child->exit_code = data;
+		pr_debug("wakeup_process\n");
+		wake_up_process(child);
+		rval = 0;
+		break;
+
+	/*
+	 * make the child exit.  Best I can do is send it a sigkill.
+	 * perhaps it should be put in the status that it wants to
+	 * exit.
+	 */
+	case PTRACE_KILL:
+		pr_debug("PTRACE_KILL\n");
+		rval = 0;
+		if (child->exit_state == EXIT_ZOMBIE)	/* already dead */
+			break;
+		child->exit_code = SIGKILL;
+		wake_up_process(child);
+		break;
+
+	case PTRACE_DETACH: /* detach a process that was attached. */
+		pr_debug("PTRACE_DETACH\n");
+		rval = ptrace_detach(child, data);
+		break;
+	default:
+		/* rval = ptrace_request(child, request, addr, data); noMMU */
+		rval = -EIO;
+	}
+	return rval;
+}
+
+void ptrace_disable(struct task_struct *child)
+{
+	/* nothing to do */
+}
diff --git a/arch/microblaze/kernel/selfmod.c b/arch/microblaze/kernel/selfmod.c
new file mode 100644
index 00000000000..89508bdc9f3
--- /dev/null
+++ b/arch/microblaze/kernel/selfmod.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2009 PetaLogix
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/interrupt.h>
+#include <asm/selfmod.h>
+
+#undef DEBUG
+
+#if __GNUC__ > 3
+#error GCC 4 unsupported SELFMOD. Please disable SELFMOD from menuconfig.
+#endif
+
+#define OPCODE_IMM		0xB0000000
+#define OPCODE_LWI		0xE8000000
+#define OPCODE_LWI_MASK		0xEC000000
+#define OPCODE_RTSD		0xB60F0008 /* return from func: rtsd r15, 8 */
+#define OPCODE_ADDIK		0x30000000
+#define OPCODE_ADDIK_MASK	0xFC000000
+
+#define IMM_BASE	(OPCODE_IMM | (BARRIER_BASE_ADDR >> 16))
+#define LWI_BASE	(OPCODE_LWI | (BARRIER_BASE_ADDR & 0x0000ff00))
+#define LWI_BASE_MASK	(OPCODE_LWI_MASK | (BARRIER_BASE_ADDR & 0x0000ff00))
+#define ADDIK_BASE	(OPCODE_ADDIK | (BARRIER_BASE_ADDR & 0x0000ff00))
+#define ADDIK_BASE_MASK	(OPCODE_ADDIK_MASK | (BARRIER_BASE_ADDR & 0x0000ff00))
+
+#define MODIFY_INSTR {						\
+	pr_debug("%s: curr instr, (%d):0x%x, next(%d):0x%x\n",		\
+		__func__, i, addr[i], i + 1, addr[i + 1]);		\
+	addr[i] = OPCODE_IMM + (base >> 16);				\
+	/* keep instruction opcode and add only last 16bits */		\
+	addr[i + 1] = (addr[i + 1] & 0xffff00ff) + (base & 0xffff);	\
+	__invalidate_icache(addr[i]);					\
+	__invalidate_icache(addr[i + 1]);				\
+	pr_debug("%s: hack instr, (%d):0x%x, next(%d):0x%x\n",		\
+		__func__, i, addr[i], i + 1, addr[i + 1]); }
+
+/* NOTE
+ * self-modified part of code for improvement of interrupt controller
+ * save instruction in interrupt rutine
+ */
+void selfmod_function(const int *arr_fce, const unsigned int base)
+{
+	unsigned int flags, i, j, *addr = NULL;
+
+	local_irq_save(flags);
+	__disable_icache();
+
+	/* zero terminated array */
+	for (j = 0; arr_fce[j] != 0; j++) {
+		/* get start address of function */
+		addr = (unsigned int *) arr_fce[j];
+		pr_debug("%s: func(%d) at 0x%x\n",
+					__func__, j, (unsigned int) addr);
+		for (i = 0; ; i++) {
+			pr_debug("%s: instruction code at %d: 0x%x\n",
+						__func__, i, addr[i]);
+			if (addr[i] == IMM_BASE) {
+				/* detecting of lwi (0xE8) or swi (0xF8) instr
+				 * I can detect both opcode with one mask */
+				if ((addr[i + 1] & LWI_BASE_MASK) == LWI_BASE) {
+					MODIFY_INSTR;
+				} else /* detection addik for ack */
+				if ((addr[i + 1] & ADDIK_BASE_MASK) ==
+								ADDIK_BASE) {
+					MODIFY_INSTR;
+				}
+			} else if (addr[i] == OPCODE_RTSD) {
+				/* return from function means end of function */
+				pr_debug("%s: end of array %d\n", __func__, i);
+				break;
+			}
+		}
+	}
+	local_irq_restore(flags);
+} /* end of self-modified code */
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
new file mode 100644
index 00000000000..eb6b41758e2
--- /dev/null
+++ b/arch/microblaze/kernel/setup.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/seq_file.h>
+#include <linux/cpu.h>
+#include <linux/initrd.h>
+#include <linux/console.h>
+#include <linux/debugfs.h>
+
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/page.h>
+#include <linux/io.h>
+#include <linux/bug.h>
+#include <linux/param.h>
+#include <linux/cache.h>
+#include <asm/cacheflush.h>
+#include <asm/entry.h>
+#include <asm/cpuinfo.h>
+
+#include <asm/system.h>
+#include <asm/prom.h>
+#include <asm/pgtable.h>
+
+DEFINE_PER_CPU(unsigned int, KSP);	/* Saved kernel stack pointer */
+DEFINE_PER_CPU(unsigned int, KM);	/* Kernel/user mode */
+DEFINE_PER_CPU(unsigned int, ENTRY_SP);	/* Saved SP on kernel entry */
+DEFINE_PER_CPU(unsigned int, R11_SAVE);	/* Temp variable for entry */
+DEFINE_PER_CPU(unsigned int, CURRENT_SAVE);	/* Saved current pointer */
+
+unsigned int boot_cpuid;
+char cmd_line[COMMAND_LINE_SIZE];
+
+void __init setup_arch(char **cmdline_p)
+{
+#ifdef CONFIG_CMDLINE_FORCE
+	strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+	strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#endif
+	*cmdline_p = cmd_line;
+
+	console_verbose();
+
+	unflatten_device_tree();
+
+	/* NOTE I think that this function is not necessary to call */
+	/* irq_early_init(); */
+	setup_cpuinfo();
+
+	__invalidate_icache_all();
+	__enable_icache();
+
+	__invalidate_dcache_all();
+	__enable_dcache();
+
+	panic_timeout = 120;
+
+	setup_memory();
+
+#if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER)
+	printk(KERN_NOTICE "Self modified code enable\n");
+#endif
+
+#ifdef CONFIG_VT
+#if defined(CONFIG_XILINX_CONSOLE)
+	conswitchp = &xil_con;
+#elif defined(CONFIG_DUMMY_CONSOLE)
+	conswitchp = &dummy_con;
+#endif
+#endif
+}
+
+#ifdef CONFIG_MTD_UCLINUX
+/* Handle both romfs and cramfs types, without generating unnecessary
+ code (ie no point checking for CRAMFS if it's not even enabled) */
+inline unsigned get_romfs_len(unsigned *addr)
+{
+#ifdef CONFIG_ROMFS_FS
+	if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */
+		return be32_to_cpu(addr[2]);
+#endif
+
+#ifdef CONFIG_CRAMFS
+	if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */
+		return le32_to_cpu(addr[1]);
+#endif
+	return 0;
+}
+#endif	/* CONFIG_MTD_UCLINUX_EBSS */
+
+void __init machine_early_init(const char *cmdline, unsigned int ram,
+		unsigned int fdt)
+{
+	unsigned long *src, *dst = (unsigned long *)0x0;
+
+/* clearing bss section */
+	memset(__bss_start, 0, __bss_stop-__bss_start);
+	memset(_ssbss, 0, _esbss-_ssbss);
+
+	/*
+	 * Copy command line passed from bootloader, or use default
+	 * if none provided, or forced
+	 */
+#ifndef CONFIG_CMDLINE_BOOL
+	if (cmdline && cmdline[0] != '\0')
+		strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE);
+#endif
+
+/* initialize device tree for usage in early_printk */
+	early_init_devtree((void *)_fdt_start);
+
+#ifdef CONFIG_EARLY_PRINTK
+	setup_early_printk(NULL);
+#endif
+
+	early_printk("Ramdisk addr 0x%08x, FDT 0x%08x\n", ram, fdt);
+	printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt);
+
+#ifdef CONFIG_MTD_UCLINUX
+	{
+		int size;
+		unsigned int romfs_base;
+		romfs_base = (ram ? ram : (unsigned int)&__init_end);
+		/* if CONFIG_MTD_UCLINUX_EBSS is defined, assume ROMFS is at the
+		 * end of kernel, which is ROMFS_LOCATION defined above. */
+		size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));
+		early_printk("Found romfs @ 0x%08x (0x%08x)\n",
+				romfs_base, size);
+		early_printk("#### klimit %p ####\n", klimit);
+		BUG_ON(size < 0); /* What else can we do? */
+
+		/* Use memmove to handle likely case of memory overlap */
+		early_printk("Moving 0x%08x bytes from 0x%08x to 0x%08x\n",
+			size, romfs_base, (unsigned)&_ebss);
+		memmove(&_ebss, (int *)romfs_base, size);
+
+		/* update klimit */
+		klimit += PAGE_ALIGN(size);
+		early_printk("New klimit: 0x%08x\n", (unsigned)klimit);
+	}
+#endif
+
+	for (src = __ivt_start; src < __ivt_end; src++, dst++)
+		*dst = *src;
+
+	/* Initialize global data */
+	per_cpu(KM, 0) = 0x1;	/* We start in kernel mode */
+	per_cpu(CURRENT_SAVE, 0) = (unsigned long)current;
+}
+
+#ifdef CONFIG_DEBUG_FS
+struct dentry *of_debugfs_root;
+
+static int microblaze_debugfs_init(void)
+{
+	of_debugfs_root = debugfs_create_dir("microblaze", NULL);
+
+	return of_debugfs_root == NULL;
+}
+arch_initcall(microblaze_debugfs_init);
+#endif
+
+void machine_restart(char *cmd)
+{
+	printk(KERN_NOTICE "Machine restart...\n");
+	dump_stack();
+	while (1)
+		;
+}
+
+void machine_shutdown(void)
+{
+	printk(KERN_NOTICE "Machine shutdown...\n");
+	while (1)
+		;
+}
+
+void machine_halt(void)
+{
+	printk(KERN_NOTICE "Machine halt...\n");
+	while (1)
+		;
+}
+
+void machine_power_off(void)
+{
+	printk(KERN_NOTICE "Machine power off...\n");
+	while (1)
+		;
+}
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
new file mode 100644
index 00000000000..40d36931e36
--- /dev/null
+++ b/arch/microblaze/kernel/signal.c
@@ -0,0 +1,543 @@
+/*
+ * Signal handling
+ *
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ * Copyright (C) 2003,2004 John Williams <jwilliams@itee.uq.edu.au>
+ * Copyright (C) 2001 NEC Corporation
+ * Copyright (C) 2001 Miles Bader <miles@gnu.org>
+ * Copyright (C) 1999,2000 Niibe Yutaka & Kaz Kojima
+ * Copyright (C) 1991,1992 Linus Torvalds
+ *
+ * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
+ *
+ * This file was was derived from the sh version, arch/sh/kernel/signal.c
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file COPYING in the main directory of this
+ * archive for more details.
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/personality.h>
+#include <linux/percpu.h>
+#include <linux/linkage.h>
+#include <asm/entry.h>
+#include <asm/ucontext.h>
+#include <linux/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <linux/syscalls.h>
+#include <asm/cacheflush.h>
+#include <asm/syscalls.h>
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_sycall);
+
+/*
+ * Atomically swap in the new signal mask, and wait for a signal.
+ */
+asmlinkage int
+sys_sigsuspend(old_sigset_t mask, struct pt_regs *regs)
+{
+	sigset_t saveset;
+
+	mask &= _BLOCKABLE;
+	spin_lock_irq(&current->sighand->siglock);
+	saveset = current->blocked;
+	siginitset(&current->blocked, mask);
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	regs->r3 = -EINTR;
+	while (1) {
+		current->state = TASK_INTERRUPTIBLE;
+		schedule();
+		if (do_signal(regs, &saveset, 1))
+			return -EINTR;
+	}
+}
+
+asmlinkage int
+sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize,
+		struct pt_regs *regs)
+{
+	sigset_t saveset, newset;
+
+	/* XXX: Don't preclude handling different sized sigset_t's. */
+	if (sigsetsize != sizeof(sigset_t))
+		return -EINVAL;
+
+	if (copy_from_user(&newset, unewset, sizeof(newset)))
+		return -EFAULT;
+	sigdelsetmask(&newset, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	saveset = current->blocked;
+	current->blocked = newset;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	regs->r3 = -EINTR;
+	while (1) {
+		current->state = TASK_INTERRUPTIBLE;
+		schedule();
+		if (do_signal(regs, &saveset, 1))
+			return -EINTR;
+	}
+}
+
+asmlinkage int
+sys_sigaction(int sig, const struct old_sigaction *act,
+		struct old_sigaction *oact)
+{
+	struct k_sigaction new_ka, old_ka;
+	int ret;
+
+	if (act) {
+		old_sigset_t mask;
+		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+			__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
+			__get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+			return -EFAULT;
+		__get_user(new_ka.sa.sa_flags, &act->sa_flags);
+		__get_user(mask, &act->sa_mask);
+		siginitset(&new_ka.sa.sa_mask, mask);
+	}
+
+	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+	if (!ret && oact) {
+		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+			__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
+			__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+			return -EFAULT;
+		__put_user(old_ka.sa.sa_flags, &oact->sa_flags);
+		__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
+	}
+
+	return ret;
+}
+
+asmlinkage int
+sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
+		struct pt_regs *regs)
+{
+	return do_sigaltstack(uss, uoss, regs->r1);
+}
+
+/*
+ * Do a signal return; undo the signal stack.
+ */
+
+struct sigframe {
+	struct sigcontext sc;
+	unsigned long extramask[_NSIG_WORDS-1];
+	unsigned long tramp[2];	/* signal trampoline */
+};
+
+struct rt_sigframe {
+	struct siginfo info;
+	struct ucontext uc;
+	unsigned long tramp[2];	/* signal trampoline */
+};
+
+static int
+restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc, int *rval_p)
+{
+	unsigned int err = 0;
+
+#define COPY(x)		{err |= __get_user(regs->x, &sc->regs.x); }
+	COPY(r0);
+	COPY(r1);
+	COPY(r2);	COPY(r3);	COPY(r4);	COPY(r5);
+	COPY(r6);	COPY(r7);	COPY(r8);	COPY(r9);
+	COPY(r10);	COPY(r11);	COPY(r12);	COPY(r13);
+	COPY(r14);	COPY(r15);	COPY(r16);	COPY(r17);
+	COPY(r18);	COPY(r19);	COPY(r20);	COPY(r21);
+	COPY(r22);	COPY(r23);	COPY(r24);	COPY(r25);
+	COPY(r26);	COPY(r27);	COPY(r28);	COPY(r29);
+	COPY(r30);	COPY(r31);
+	COPY(pc);	COPY(ear);	COPY(esr);	COPY(fsr);
+#undef COPY
+
+	*rval_p = regs->r3;
+
+	return err;
+}
+
+asmlinkage int sys_sigreturn(struct pt_regs *regs)
+{
+	struct sigframe *frame =
+			(struct sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE);
+
+	sigset_t set;
+	int rval;
+
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+		goto badframe;
+
+	if (__get_user(set.sig[0], &frame->sc.oldmask)
+		|| (_NSIG_WORDS > 1
+		&& __copy_from_user(&set.sig[1], &frame->extramask,
+					sizeof(frame->extramask))))
+		goto badframe;
+
+	sigdelsetmask(&set, ~_BLOCKABLE);
+
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	if (restore_sigcontext(regs, &frame->sc, &rval))
+		goto badframe;
+	return rval;
+
+badframe:
+	force_sig(SIGSEGV, current);
+	return 0;
+}
+
+asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
+{
+	struct rt_sigframe *frame =
+			(struct rt_sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE);
+
+	sigset_t set;
+	stack_t st;
+	int rval;
+
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+		goto badframe;
+
+	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+		goto badframe;
+
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval))
+		goto badframe;
+
+	if (__copy_from_user((void *)&st, &frame->uc.uc_stack, sizeof(st)))
+		goto badframe;
+	/* It is more difficult to avoid calling this function than to
+	 call it and ignore errors. */
+	do_sigaltstack(&st, NULL, regs->r1);
+
+	return rval;
+
+badframe:
+	force_sig(SIGSEGV, current);
+	return 0;
+}
+
+/*
+ * Set up a signal frame.
+ */
+
+static int
+setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
+		unsigned long mask)
+{
+	int err = 0;
+
+#define COPY(x)		{err |= __put_user(regs->x, &sc->regs.x); }
+	COPY(r0);
+	COPY(r1);
+	COPY(r2);	COPY(r3);	COPY(r4);	COPY(r5);
+	COPY(r6);	COPY(r7);	COPY(r8);	COPY(r9);
+	COPY(r10);	COPY(r11);	COPY(r12);	COPY(r13);
+	COPY(r14);	COPY(r15);	COPY(r16);	COPY(r17);
+	COPY(r18);	COPY(r19);	COPY(r20);	COPY(r21);
+	COPY(r22);	COPY(r23);	COPY(r24);	COPY(r25);
+	COPY(r26);	COPY(r27);	COPY(r28);	COPY(r29);
+	COPY(r30);	COPY(r31);
+	COPY(pc);	COPY(ear);	COPY(esr);	COPY(fsr);
+#undef COPY
+
+	err |= __put_user(mask, &sc->oldmask);
+
+	return err;
+}
+
+/*
+ * Determine which stack to use..
+ */
+static inline void *
+get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
+{
+	/* Default to using normal stack */
+	unsigned long sp = regs->r1;
+
+	if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp))
+		sp = current->sas_ss_sp + current->sas_ss_size;
+
+	return (void *)((sp - frame_size) & -8UL);
+}
+
+static void setup_frame(int sig, struct k_sigaction *ka,
+			sigset_t *set, struct pt_regs *regs)
+{
+	struct sigframe *frame;
+	int err = 0;
+	int signal;
+
+	frame = get_sigframe(ka, regs, sizeof(*frame));
+
+	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+		goto give_sigsegv;
+
+	signal = current_thread_info()->exec_domain
+		&& current_thread_info()->exec_domain->signal_invmap
+		&& sig < 32
+		? current_thread_info()->exec_domain->signal_invmap[sig]
+		: sig;
+
+	err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
+
+	if (_NSIG_WORDS > 1) {
+		err |= __copy_to_user(frame->extramask, &set->sig[1],
+					sizeof(frame->extramask));
+	}
+
+	/* Set up to return from userspace. If provided, use a stub
+	 already in userspace. */
+	/* minus 8 is offset to cater for "rtsd r15,8" offset */
+	if (ka->sa.sa_flags & SA_RESTORER) {
+		regs->r15 = ((unsigned long)ka->sa.sa_restorer)-8;
+	} else {
+		/* Note, these encodings are _big endian_! */
+
+		/* addi r12, r0, __NR_sigreturn */
+		err |= __put_user(0x31800000 | __NR_sigreturn ,
+				frame->tramp + 0);
+		/* brki r14, 0x8 */
+		err |= __put_user(0xb9cc0008, frame->tramp + 1);
+
+		/* Return from sighandler will jump to the tramp.
+		 Negative 8 offset because return is rtsd r15, 8 */
+		regs->r15 = ((unsigned long)frame->tramp)-8;
+
+		__invalidate_cache_sigtramp((unsigned long)frame->tramp);
+	}
+
+	if (err)
+		goto give_sigsegv;
+
+	/* Set up registers for signal handler */
+	regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE;
+
+	/* Signal handler args: */
+	regs->r5 = signal; /* Arg 0: signum */
+	regs->r6 = (unsigned long) &frame->sc; /* arg 1: sigcontext */
+
+	/* Offset of 4 to handle microblaze rtid r14, 0 */
+	regs->pc = (unsigned long)ka->sa.sa_handler;
+
+	set_fs(USER_DS);
+
+#ifdef DEBUG_SIG
+	printk(KERN_INFO "SIG deliver (%s:%d): sp=%p pc=%08lx\n",
+		current->comm, current->pid, frame, regs->pc);
+#endif
+
+	return;
+
+give_sigsegv:
+	if (sig == SIGSEGV)
+		ka->sa.sa_handler = SIG_DFL;
+	force_sig(SIGSEGV, current);
+}
+
+static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+			sigset_t *set, struct pt_regs *regs)
+{
+	struct rt_sigframe *frame;
+	int err = 0;
+	int signal;
+
+	frame = get_sigframe(ka, regs, sizeof(*frame));
+
+	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+		goto give_sigsegv;
+
+	signal = current_thread_info()->exec_domain
+		&& current_thread_info()->exec_domain->signal_invmap
+		&& sig < 32
+		? current_thread_info()->exec_domain->signal_invmap[sig]
+		: sig;
+
+	err |= copy_siginfo_to_user(&frame->info, info);
+
+	/* Create the ucontext. */
+	err |= __put_user(0, &frame->uc.uc_flags);
+	err |= __put_user(0, &frame->uc.uc_link);
+	err |= __put_user((void *)current->sas_ss_sp,
+			&frame->uc.uc_stack.ss_sp);
+	err |= __put_user(sas_ss_flags(regs->r1),
+			&frame->uc.uc_stack.ss_flags);
+	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= setup_sigcontext(&frame->uc.uc_mcontext,
+			regs, set->sig[0]);
+	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+
+	/* Set up to return from userspace. If provided, use a stub
+	 already in userspace. */
+	/* minus 8 is offset to cater for "rtsd r15,8" */
+	if (ka->sa.sa_flags & SA_RESTORER) {
+		regs->r15 = ((unsigned long)ka->sa.sa_restorer)-8;
+	} else {
+		/* addi r12, r0, __NR_sigreturn */
+		err |= __put_user(0x31800000 | __NR_rt_sigreturn ,
+				frame->tramp + 0);
+		/* brki r14, 0x8 */
+		err |= __put_user(0xb9cc0008, frame->tramp + 1);
+
+		/* Return from sighandler will jump to the tramp.
+		 Negative 8 offset because return is rtsd r15, 8 */
+		regs->r15 = ((unsigned long)frame->tramp)-8;
+
+		__invalidate_cache_sigtramp((unsigned long)frame->tramp);
+	}
+
+	if (err)
+		goto give_sigsegv;
+
+	/* Set up registers for signal handler */
+	regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE;
+
+	/* Signal handler args: */
+	regs->r5 = signal; /* arg 0: signum */
+	regs->r6 = (unsigned long) &frame->info; /* arg 1: siginfo */
+	regs->r7 = (unsigned long) &frame->uc; /* arg2: ucontext */
+	/* Offset to handle microblaze rtid r14, 0 */
+	regs->pc = (unsigned long)ka->sa.sa_handler;
+
+	set_fs(USER_DS);
+
+#ifdef DEBUG_SIG
+	printk(KERN_INFO "SIG deliver (%s:%d): sp=%p pc=%08lx\n",
+		current->comm, current->pid, frame, regs->pc);
+#endif
+
+	return;
+
+give_sigsegv:
+	if (sig == SIGSEGV)
+		ka->sa.sa_handler = SIG_DFL;
+	force_sig(SIGSEGV, current);
+}
+
+/* Handle restarting system calls */
+static inline void
+handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
+{
+	switch (regs->r3) {
+	case -ERESTART_RESTARTBLOCK:
+	case -ERESTARTNOHAND:
+		if (!has_handler)
+			goto do_restart;
+		regs->r3 = -EINTR;
+		break;
+	case -ERESTARTSYS:
+		if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
+			regs->r3 = -EINTR;
+			break;
+	}
+	/* fallthrough */
+	case -ERESTARTNOINTR:
+do_restart:
+		/* offset of 4 bytes to re-execute trap (brki) instruction */
+		regs->pc -= 4;
+		break;
+	}
+}
+
+/*
+ * OK, we're invoking a handler
+ */
+
+static void
+handle_signal(unsigned long sig, struct k_sigaction *ka,
+		siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
+{
+	/* Set up the stack frame */
+	if (ka->sa.sa_flags & SA_SIGINFO)
+		setup_rt_frame(sig, ka, info, oldset, regs);
+	else
+		setup_frame(sig, ka, oldset, regs);
+
+	if (ka->sa.sa_flags & SA_ONESHOT)
+		ka->sa.sa_handler = SIG_DFL;
+
+	if (!(ka->sa.sa_flags & SA_NODEFER)) {
+		spin_lock_irq(&current->sighand->siglock);
+		sigorsets(&current->blocked,
+				&current->blocked, &ka->sa.sa_mask);
+		sigaddset(&current->blocked, sig);
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
+}
+
+/*
+ * Note that 'init' is a special process: it doesn't get signals it doesn't
+ * want to handle. Thus you cannot kill init even with a SIGKILL even by
+ * mistake.
+ *
+ * Note that we go through the signals twice: once to check the signals that
+ * the kernel can handle, and then we build all the user-level signal handling
+ * stack-frames in one go after that.
+ */
+int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall)
+{
+	siginfo_t info;
+	int signr;
+	struct k_sigaction ka;
+#ifdef DEBUG_SIG
+	printk(KERN_INFO "do signal: %p %p %d\n", regs, oldset, in_syscall);
+	printk(KERN_INFO "do signal2: %lx %lx %ld [%lx]\n", regs->pc, regs->r1,
+			regs->r12, current_thread_info()->flags);
+#endif
+	/*
+	 * We want the common case to go fast, which
+	 * is why we may in certain cases get here from
+	 * kernel mode. Just return without doing anything
+	 * if so.
+	 */
+	if (kernel_mode(regs))
+		return 1;
+
+	if (!oldset)
+		oldset = &current->blocked;
+
+	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+	if (signr > 0) {
+		/* Whee! Actually deliver the signal. */
+		if (in_syscall)
+			handle_restart(regs, &ka, 1);
+		handle_signal(signr, &ka, &info, oldset, regs);
+		return 1;
+	}
+
+	if (in_syscall)
+		handle_restart(regs, NULL, 0);
+
+	/* Did we come from a system call? */
+	return 0;
+}
diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c
new file mode 100644
index 00000000000..ba0568c2cc1
--- /dev/null
+++ b/arch/microblaze/kernel/sys_microblaze.c
@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
+ *
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *	Yasushi SHOJI <yashi@atmark-techno.com>
+ *	Tetsuya OHKAWA <tetsuya@atmark-techno.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/syscalls.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/mman.h>
+#include <linux/sys.h>
+#include <linux/ipc.h>
+#include <linux/utsname.h>
+#include <linux/file.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/semaphore.h>
+#include <linux/uaccess.h>
+#include <linux/unistd.h>
+
+#include <asm/syscalls.h>
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly. This will be remove with new toolchain.
+ */
+asmlinkage int
+sys_ipc(uint call, int first, int second, int third, void *ptr, long fifth)
+{
+	int version, ret;
+
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	ret = -EINVAL;
+	switch (call) {
+	case SEMOP:
+		ret = sys_semop(first, (struct sembuf *)ptr, second);
+		break;
+	case SEMGET:
+		ret = sys_semget(first, second, third);
+		break;
+	case SEMCTL:
+	{
+		union semun fourth;
+
+		if (!ptr)
+			break;
+		ret = (access_ok(VERIFY_READ, ptr, sizeof(long)) ? 0 : -EFAULT)
+				|| (get_user(fourth.__pad, (void **)ptr)) ;
+		if (ret)
+			break;
+		ret = sys_semctl(first, second, third, fourth);
+		break;
+	}
+	case MSGSND:
+		ret = sys_msgsnd(first, (struct msgbuf *) ptr, second, third);
+		break;
+	case MSGRCV:
+		switch (version) {
+		case 0: {
+			struct ipc_kludge tmp;
+
+			if (!ptr)
+				break;
+			ret = (access_ok(VERIFY_READ, ptr, sizeof(tmp))
+				? 0 : -EFAULT) || copy_from_user(&tmp,
+				(struct ipc_kludge *) ptr, sizeof(tmp));
+			if (ret)
+				break;
+			ret = sys_msgrcv(first, tmp.msgp, second, tmp.msgtyp,
+					third);
+			break;
+			}
+		default:
+			ret = sys_msgrcv(first, (struct msgbuf *) ptr,
+					second, fifth, third);
+			break;
+		}
+		break;
+	case MSGGET:
+		ret = sys_msgget((key_t) first, second);
+		break;
+	case MSGCTL:
+		ret = sys_msgctl(first, second, (struct msqid_ds *) ptr);
+		break;
+	case SHMAT:
+		switch (version) {
+		default: {
+			ulong raddr;
+			ret = access_ok(VERIFY_WRITE, (ulong *) third,
+					sizeof(ulong)) ? 0 : -EFAULT;
+			if (ret)
+				break;
+			ret = do_shmat(first, (char *) ptr, second, &raddr);
+			if (ret)
+				break;
+			ret = put_user(raddr, (ulong *) third);
+			break;
+			}
+		case 1:	/* iBCS2 emulator entry point */
+			if (!segment_eq(get_fs(), get_ds()))
+				break;
+			ret = do_shmat(first, (char *) ptr, second,
+					(ulong *) third);
+			break;
+		}
+		break;
+	case SHMDT:
+		ret = sys_shmdt((char *)ptr);
+		break;
+	case SHMGET:
+		ret = sys_shmget(first, second, third);
+		break;
+	case SHMCTL:
+		ret = sys_shmctl(first, second, (struct shmid_ds *) ptr);
+		break;
+	}
+	return -EINVAL;
+}
+
+asmlinkage int sys_vfork(struct pt_regs *regs)
+{
+	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1,
+						regs, 0, NULL, NULL);
+}
+
+asmlinkage int sys_clone(int flags, unsigned long stack, struct pt_regs *regs)
+{
+	if (!stack)
+		stack = regs->r1;
+	return do_fork(flags, stack, regs, 0, NULL, NULL);
+}
+
+asmlinkage int sys_execve(char __user *filenamei, char __user *__user *argv,
+			char __user *__user *envp, struct pt_regs *regs)
+{
+	int error;
+	char *filename;
+
+	filename = getname(filenamei);
+	error = PTR_ERR(filename);
+	if (IS_ERR(filename))
+		goto out;
+	error = do_execve(filename, argv, envp, regs);
+	putname(filename);
+out:
+	return error;
+}
+
+asmlinkage unsigned long
+sys_mmap2(unsigned long addr, size_t len,
+	unsigned long prot, unsigned long flags,
+	unsigned long fd, unsigned long pgoff)
+{
+	struct file *file = NULL;
+	int ret = -EBADF;
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file) {
+			printk(KERN_INFO "no fd in mmap\r\n");
+			goto out;
+		}
+	}
+
+	down_write(&current->mm->mmap_sem);
+	ret = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+	up_write(&current->mm->mmap_sem);
+	if (file)
+		fput(file);
+out:
+	return ret;
+}
+
+asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
+			unsigned long prot, unsigned long flags,
+			unsigned long fd, off_t offset)
+{
+	int err = -EINVAL;
+
+	if (offset & ~PAGE_MASK) {
+		printk(KERN_INFO "no pagemask in mmap\r\n");
+		goto out;
+	}
+
+	err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+out:
+	return err;
+}
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename, char *const argv[], char *const envp[])
+{
+	register const char *__a __asm__("r5") = filename;
+	register const void *__b __asm__("r6") = argv;
+	register const void *__c __asm__("r7") = envp;
+	register unsigned long __syscall __asm__("r12") = __NR_execve;
+	register unsigned long __ret __asm__("r3");
+	__asm__ __volatile__ ("brki r14, 0x8"
+			: "=r" (__ret), "=r" (__syscall)
+			: "1" (__syscall), "r" (__a), "r" (__b), "r" (__c)
+			: "r4", "r8", "r9",
+			"r10", "r11", "r14", "cc", "memory");
+	return __ret;
+}
diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S
new file mode 100644
index 00000000000..3bb42ec924c
--- /dev/null
+++ b/arch/microblaze/kernel/syscall_table.S
@@ -0,0 +1,367 @@
+ENTRY(sys_call_table)
+	.long sys_restart_syscall	/* 0 - old "setup()" system call,
+					 * used for restarting */
+	.long sys_exit
+	.long sys_ni_syscall		/* was fork */
+	.long sys_read
+	.long sys_write
+	.long sys_open			/* 5 */
+	.long sys_close
+	.long sys_waitpid
+	.long sys_creat
+	.long sys_link
+	.long sys_unlink		/* 10 */
+	.long sys_execve_wrapper
+	.long sys_chdir
+	.long sys_time
+	.long sys_mknod
+	.long sys_chmod			/* 15 */
+	.long sys_lchown
+	.long sys_ni_syscall		/* old break syscall holder */
+	.long sys_ni_syscall		/* old stat */
+	.long sys_lseek
+	.long sys_getpid		/* 20 */
+	.long sys_mount
+	.long sys_oldumount
+	.long sys_setuid
+	.long sys_getuid
+	.long sys_stime			/* 25 */
+	.long sys_ptrace
+	.long sys_alarm
+	.long sys_ni_syscall		/* oldfstat */
+	.long sys_pause
+	.long sys_utime			/* 30 */
+	.long sys_ni_syscall		/* old stty syscall holder */
+	.long sys_ni_syscall		/* old gtty syscall holder */
+	.long sys_access
+	.long sys_nice
+	.long sys_ni_syscall		/* 35 - old ftime syscall holder */
+	.long sys_sync
+	.long sys_kill
+	.long sys_rename
+	.long sys_mkdir
+	.long sys_rmdir			/* 40 */
+	.long sys_dup
+	.long sys_pipe
+	.long sys_times
+	.long sys_ni_syscall		/* old prof syscall holder */
+	.long sys_brk			/* 45 */
+	.long sys_setgid
+	.long sys_getgid
+	.long sys_signal
+	.long sys_geteuid
+	.long sys_getegid		/* 50 */
+	.long sys_acct
+	.long sys_umount		/* recycled never used phys() */
+	.long sys_ni_syscall		/* old lock syscall holder */
+	.long sys_ioctl
+	.long sys_fcntl			/* 55 */
+	.long sys_ni_syscall		/* old mpx syscall holder */
+	.long sys_setpgid
+	.long sys_ni_syscall		/* old ulimit syscall holder */
+	.long sys_ni_syscall		/* olduname */
+	.long sys_umask			/* 60 */
+	.long sys_chroot
+	.long sys_ustat
+	.long sys_dup2
+	.long sys_getppid
+	.long sys_getpgrp		/* 65 */
+	.long sys_setsid
+	.long sys_sigaction
+	.long sys_sgetmask
+	.long sys_ssetmask
+	.long sys_setreuid		/* 70 */
+	.long sys_setregid
+	.long sys_sigsuspend_wrapper
+	.long sys_sigpending
+	.long sys_sethostname
+	.long sys_setrlimit		/* 75 */
+	.long sys_ni_syscall		/* old_getrlimit */
+	.long sys_getrusage
+	.long sys_gettimeofday
+	.long sys_settimeofday
+	.long sys_getgroups		/* 80 */
+	.long sys_setgroups
+	.long sys_ni_syscall		/* old_select */
+	.long sys_symlink
+	.long sys_ni_syscall		/* oldlstat */
+	.long sys_readlink		/* 85 */
+	.long sys_uselib
+	.long sys_swapon
+	.long sys_reboot
+	.long sys_ni_syscall		/* old_readdir */
+	.long sys_mmap			/* 90 */ /* old_mmap */
+	.long sys_munmap
+	.long sys_truncate
+	.long sys_ftruncate
+	.long sys_fchmod
+	.long sys_fchown		/* 95 */
+	.long sys_getpriority
+	.long sys_setpriority
+	.long sys_ni_syscall		/* old profil syscall holder */
+	.long sys_statfs
+	.long sys_fstatfs		/* 100 */
+	.long sys_ni_syscall		/* ioperm */
+	.long sys_socketcall
+	.long sys_syslog		/* operation with system console */
+	.long sys_setitimer
+	.long sys_getitimer		/* 105 */
+	.long sys_newstat
+	.long sys_newlstat
+	.long sys_newfstat
+	.long sys_ni_syscall		/* uname */
+	.long sys_ni_syscall		/* 110 */ /* iopl */
+	.long sys_vhangup
+	.long sys_ni_syscall		/* old "idle" system call */
+	.long sys_ni_syscall		/* old sys_vm86old */
+	.long sys_wait4
+	.long sys_swapoff		/* 115 */
+	.long sys_sysinfo
+	.long sys_ipc
+	.long sys_fsync
+	.long sys_sigreturn_wrapper
+	.long sys_clone_wrapper		/* 120 */
+	.long sys_setdomainname
+	.long sys_newuname
+	.long sys_ni_syscall		/* modify_ldt */
+	.long sys_adjtimex
+	.long sys_mprotect		/* 125:	sys_mprotect */
+	.long sys_sigprocmask
+	.long sys_ni_syscall		/* old "create_module" */
+	.long sys_init_module
+	.long sys_delete_module
+	.long sys_ni_syscall		/* 130:	old "get_kernel_syms" */
+	.long sys_quotactl
+	.long sys_getpgid
+	.long sys_fchdir
+	.long sys_bdflush
+	.long sys_sysfs			/* 135 */
+	.long sys_personality
+	.long sys_ni_syscall		/* reserved for afs_syscall */
+	.long sys_setfsuid
+	.long sys_setfsgid
+	.long sys_llseek		/* 140 */
+	.long sys_getdents
+	.long sys_select
+	.long sys_flock
+	.long sys_msync
+	.long sys_readv			/* 145 */
+	.long sys_writev
+	.long sys_getsid
+	.long sys_fdatasync
+	.long sys_sysctl
+	.long sys_mlock		/* 150:	sys_mlock */
+	.long sys_munlock
+	.long sys_mlockall
+	.long sys_munlockall
+	.long sys_sched_setparam
+	.long sys_sched_getparam	/* 155 */
+	.long sys_sched_setscheduler
+	.long sys_sched_getscheduler
+	.long sys_sched_yield
+	.long sys_sched_get_priority_max
+	.long sys_sched_get_priority_min	/* 160 */
+	.long sys_sched_rr_get_interval
+	.long sys_nanosleep
+	.long sys_mremap
+	.long sys_setresuid
+	.long sys_getresuid		/* 165 */
+	.long sys_ni_syscall		/* sys_vm86 */
+	.long sys_ni_syscall		/* Old sys_query_module */
+	.long sys_poll
+	.long sys_nfsservctl
+	.long sys_setresgid		/* 170 */
+	.long sys_getresgid
+	.long sys_prctl
+	.long sys_rt_sigreturn_wrapper
+	.long sys_rt_sigaction
+	.long sys_rt_sigprocmask	/* 175 */
+	.long sys_rt_sigpending
+	.long sys_rt_sigtimedwait
+	.long sys_rt_sigqueueinfo
+	.long sys_rt_sigsuspend_wrapper
+	.long sys_pread64		/* 180 */
+	.long sys_pwrite64
+	.long sys_chown
+	.long sys_getcwd
+	.long sys_capget
+	.long sys_capset		/* 185 */
+	.long sys_ni_syscall		/* sigaltstack */
+	.long sys_sendfile
+	.long sys_ni_syscall		/* reserved for streams1 */
+	.long sys_ni_syscall		/* reserved for streams2 */
+	.long sys_vfork_wrapper		/* 190 */
+	.long sys_getrlimit
+	.long sys_mmap2			/* mmap2 */
+	.long sys_truncate64
+	.long sys_ftruncate64
+	.long sys_stat64		/* 195 */
+	.long sys_lstat64
+	.long sys_fstat64
+	.long sys_lchown
+	.long sys_getuid
+	.long sys_getgid		/* 200 */
+	.long sys_geteuid
+	.long sys_getegid
+	.long sys_setreuid
+	.long sys_setregid
+	.long sys_getgroups		/* 205 */
+	.long sys_setgroups
+	.long sys_fchown
+	.long sys_setresuid
+	.long sys_getresuid
+	.long sys_setresgid		/* 210 */
+	.long sys_getresgid
+	.long sys_chown
+	.long sys_setuid
+	.long sys_setgid
+	.long sys_setfsuid		/* 215 */
+	.long sys_setfsgid
+	.long sys_pivot_root
+	.long sys_mincore
+	.long sys_madvise
+	.long sys_getdents64		/* 220 */
+	.long sys_fcntl64
+	.long sys_ni_syscall		/* reserved for TUX */
+	.long sys_ni_syscall
+	.long sys_gettid
+	.long sys_readahead		/* 225 */
+	.long sys_setxattr
+	.long sys_lsetxattr
+	.long sys_fsetxattr
+	.long sys_getxattr
+	.long sys_lgetxattr		/* 230 */
+	.long sys_fgetxattr
+	.long sys_listxattr
+	.long sys_llistxattr
+	.long sys_flistxattr
+	.long sys_removexattr		/* 235 */
+	.long sys_lremovexattr
+	.long sys_fremovexattr
+	.long sys_tkill
+	.long sys_sendfile64
+	.long sys_futex			/* 240 */
+	.long sys_sched_setaffinity
+	.long sys_sched_getaffinity
+	.long sys_ni_syscall		/* set_thread_area */
+	.long sys_ni_syscall		/* get_thread_area */
+	.long sys_io_setup		/* 245 */
+	.long sys_io_destroy
+	.long sys_io_getevents
+	.long sys_io_submit
+	.long sys_io_cancel
+	.long sys_fadvise64		/* 250 */
+	.long sys_ni_syscall
+	.long sys_exit_group
+	.long sys_lookup_dcookie
+	.long sys_epoll_create
+	.long sys_epoll_ctl		/* 255 */
+	.long sys_epoll_wait
+	.long sys_remap_file_pages
+	.long sys_set_tid_address
+	.long sys_timer_create
+	.long sys_timer_settime		/* 260 */
+	.long sys_timer_gettime
+	.long sys_timer_getoverrun
+	.long sys_timer_delete
+	.long sys_clock_settime
+	.long sys_clock_gettime		/* 265 */
+	.long sys_clock_getres
+	.long sys_clock_nanosleep
+	.long sys_statfs64
+	.long sys_fstatfs64
+	.long sys_tgkill		/* 270 */
+	.long sys_utimes
+	.long sys_fadvise64_64
+	.long sys_ni_syscall		/* sys_vserver */
+	.long sys_mbind
+	.long sys_get_mempolicy
+	.long sys_set_mempolicy
+	.long sys_mq_open
+	.long sys_mq_unlink
+	.long sys_mq_timedsend
+	.long sys_mq_timedreceive	/* 280 */
+	.long sys_mq_notify
+	.long sys_mq_getsetattr
+	.long sys_kexec_load
+	.long sys_waitid
+	.long sys_ni_syscall		/* 285 */ /* available */
+	.long sys_add_key
+	.long sys_request_key
+	.long sys_keyctl
+	.long sys_ioprio_set
+	.long sys_ioprio_get		/* 290 */
+	.long sys_inotify_init
+	.long sys_inotify_add_watch
+	.long sys_inotify_rm_watch
+	.long sys_ni_syscall		/* sys_migrate_pages */
+	.long sys_openat	/* 295 */
+	.long sys_mkdirat
+	.long sys_mknodat
+	.long sys_fchownat
+	.long sys_ni_syscall
+	.long sys_fstatat64		/* 300 */
+	.long sys_unlinkat
+	.long sys_renameat
+	.long sys_linkat
+	.long sys_symlinkat
+	.long sys_readlinkat		/* 305 */
+	.long sys_fchmodat
+	.long sys_faccessat
+	.long sys_ni_syscall /* pselect6 */
+	.long sys_ni_syscall /* sys_ppoll */
+	.long sys_unshare		/* 310 */
+	.long sys_set_robust_list
+	.long sys_get_robust_list
+	.long sys_splice
+	.long sys_sync_file_range
+	.long sys_tee 			/* 315 */
+	.long sys_vmsplice
+	.long sys_move_pages
+	.long sys_getcpu
+	.long sys_epoll_pwait
+	.long sys_utimensat		/* 320 */
+	.long sys_signalfd
+	.long sys_timerfd_create
+	.long sys_eventfd
+	.long sys_fallocate
+	.long sys_semtimedop		/* 325 */
+	.long sys_timerfd_settime
+	.long sys_timerfd_gettime
+	.long sys_semctl
+	.long sys_semget
+	.long sys_semop			/* 330 */
+	.long sys_msgctl
+	.long sys_msgget
+	.long sys_msgrcv
+	.long sys_msgsnd
+	.long sys_shmat			/* 335 */
+	.long sys_shmctl
+	.long sys_shmdt
+	.long sys_shmget
+	.long sys_signalfd4	/* new syscall */
+	.long sys_eventfd2		/* 340 */
+	.long sys_epoll_create1
+	.long sys_dup3
+	.long sys_pipe2
+	.long sys_inotify_init1
+	.long sys_socket		/* 345 */
+	.long sys_socketpair
+	.long sys_bind
+	.long sys_listen
+	.long sys_accept
+	.long sys_connect		/* 350 */
+	.long sys_getsockname
+	.long sys_getpeername
+	.long sys_sendto
+	.long sys_send
+	.long sys_recvfrom		/* 355 */
+	.long sys_recv
+	.long sys_setsockopt
+	.long sys_getsockopt
+	.long sys_shutdown
+	.long sys_sendmsg		/* 360 */
+	.long sys_recvmsg
+	.long sys_ni_syscall
+	.long sys_ni_syscall
+	.long sys_ni_syscall
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
new file mode 100644
index 00000000000..bdfa2f9f0c8
--- /dev/null
+++ b/arch/microblaze/kernel/timer.c
@@ -0,0 +1,262 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/interrupt.h>
+#include <linux/profile.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/io.h>
+#include <asm/cpuinfo.h>
+#include <asm/setup.h>
+#include <asm/prom.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+
+#ifdef CONFIG_SELFMOD_TIMER
+#include <asm/selfmod.h>
+#define TIMER_BASE	BARRIER_BASE_ADDR
+#else
+static unsigned int timer_baseaddr;
+#define TIMER_BASE	timer_baseaddr
+#endif
+
+#define TCSR0	(0x00)
+#define TLR0	(0x04)
+#define TCR0	(0x08)
+#define TCSR1	(0x10)
+#define TLR1	(0x14)
+#define TCR1	(0x18)
+
+#define TCSR_MDT	(1<<0)
+#define TCSR_UDT	(1<<1)
+#define TCSR_GENT	(1<<2)
+#define TCSR_CAPT	(1<<3)
+#define TCSR_ARHT	(1<<4)
+#define TCSR_LOAD	(1<<5)
+#define TCSR_ENIT	(1<<6)
+#define TCSR_ENT	(1<<7)
+#define TCSR_TINT	(1<<8)
+#define TCSR_PWMA	(1<<9)
+#define TCSR_ENALL	(1<<10)
+
+static inline void microblaze_timer0_stop(void)
+{
+	out_be32(TIMER_BASE + TCSR0, in_be32(TIMER_BASE + TCSR0) & ~TCSR_ENT);
+}
+
+static inline void microblaze_timer0_start_periodic(unsigned long load_val)
+{
+	if (!load_val)
+		load_val = 1;
+	out_be32(TIMER_BASE + TLR0, load_val); /* loading value to timer reg */
+
+	/* load the initial value */
+	out_be32(TIMER_BASE + TCSR0, TCSR_LOAD);
+
+	/* see timer data sheet for detail
+	 * !ENALL - don't enable 'em all
+	 * !PWMA - disable pwm
+	 * TINT - clear interrupt status
+	 * ENT- enable timer itself
+	 * EINT - enable interrupt
+	 * !LOAD - clear the bit to let go
+	 * ARHT - auto reload
+	 * !CAPT - no external trigger
+	 * !GENT - no external signal
+	 * UDT - set the timer as down counter
+	 * !MDT0 - generate mode
+	 */
+	out_be32(TIMER_BASE + TCSR0,
+			TCSR_TINT|TCSR_ENIT|TCSR_ENT|TCSR_ARHT|TCSR_UDT);
+}
+
+static inline void microblaze_timer0_start_oneshot(unsigned long load_val)
+{
+	if (!load_val)
+		load_val = 1;
+	out_be32(TIMER_BASE + TLR0, load_val); /* loading value to timer reg */
+
+	/* load the initial value */
+	out_be32(TIMER_BASE + TCSR0, TCSR_LOAD);
+
+	out_be32(TIMER_BASE + TCSR0,
+			TCSR_TINT|TCSR_ENIT|TCSR_ENT|TCSR_ARHT|TCSR_UDT);
+}
+
+static int microblaze_timer_set_next_event(unsigned long delta,
+					struct clock_event_device *dev)
+{
+	pr_debug("%s: next event, delta %x\n", __func__, (u32)delta);
+	microblaze_timer0_start_oneshot(delta);
+	return 0;
+}
+
+static void microblaze_timer_set_mode(enum clock_event_mode mode,
+				struct clock_event_device *evt)
+{
+	switch (mode) {
+	case CLOCK_EVT_MODE_PERIODIC:
+		printk(KERN_INFO "%s: periodic\n", __func__);
+		microblaze_timer0_start_periodic(cpuinfo.freq_div_hz);
+		break;
+	case CLOCK_EVT_MODE_ONESHOT:
+		printk(KERN_INFO "%s: oneshot\n", __func__);
+		break;
+	case CLOCK_EVT_MODE_UNUSED:
+		printk(KERN_INFO "%s: unused\n", __func__);
+		break;
+	case CLOCK_EVT_MODE_SHUTDOWN:
+		printk(KERN_INFO "%s: shutdown\n", __func__);
+		microblaze_timer0_stop();
+		break;
+	case CLOCK_EVT_MODE_RESUME:
+		printk(KERN_INFO "%s: resume\n", __func__);
+		break;
+	}
+}
+
+static struct clock_event_device clockevent_microblaze_timer = {
+	.name		= "microblaze_clockevent",
+	.features       = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
+	.shift		= 24,
+	.rating		= 300,
+	.set_next_event	= microblaze_timer_set_next_event,
+	.set_mode	= microblaze_timer_set_mode,
+};
+
+static inline void timer_ack(void)
+{
+	out_be32(TIMER_BASE + TCSR0, in_be32(TIMER_BASE + TCSR0));
+}
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *evt = &clockevent_microblaze_timer;
+#ifdef CONFIG_HEART_BEAT
+	heartbeat();
+#endif
+	timer_ack();
+	evt->event_handler(evt);
+	return IRQ_HANDLED;
+}
+
+static struct irqaction timer_irqaction = {
+	.handler = timer_interrupt,
+	.flags = IRQF_DISABLED | IRQF_TIMER,
+	.name = "timer",
+	.dev_id = &clockevent_microblaze_timer,
+};
+
+static __init void microblaze_clockevent_init(void)
+{
+	clockevent_microblaze_timer.mult =
+		div_sc(cpuinfo.cpu_clock_freq, NSEC_PER_SEC,
+				clockevent_microblaze_timer.shift);
+	clockevent_microblaze_timer.max_delta_ns =
+		clockevent_delta2ns((u32)~0, &clockevent_microblaze_timer);
+	clockevent_microblaze_timer.min_delta_ns =
+		clockevent_delta2ns(1, &clockevent_microblaze_timer);
+	clockevent_microblaze_timer.cpumask = cpumask_of(0);
+	clockevents_register_device(&clockevent_microblaze_timer);
+}
+
+static cycle_t microblaze_read(struct clocksource *cs)
+{
+	/* reading actual value of timer 1 */
+	return (cycle_t) (in_be32(TIMER_BASE + TCR1));
+}
+
+static struct clocksource clocksource_microblaze = {
+	.name		= "microblaze_clocksource",
+	.rating		= 300,
+	.read		= microblaze_read,
+	.mask		= CLOCKSOURCE_MASK(32),
+	.shift		= 24, /* I can shift it */
+	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static int __init microblaze_clocksource_init(void)
+{
+	clocksource_microblaze.mult =
+			clocksource_hz2mult(cpuinfo.cpu_clock_freq,
+						clocksource_microblaze.shift);
+	if (clocksource_register(&clocksource_microblaze))
+		panic("failed to register clocksource");
+
+	/* stop timer1 */
+	out_be32(TIMER_BASE + TCSR1, in_be32(TIMER_BASE + TCSR1) & ~TCSR_ENT);
+	/* start timer1 - up counting without interrupt */
+	out_be32(TIMER_BASE + TCSR1, TCSR_TINT|TCSR_ENT|TCSR_ARHT);
+	return 0;
+}
+
+void __init time_init(void)
+{
+	u32 irq, i = 0;
+	u32 timer_num = 1;
+	struct device_node *timer = NULL;
+#ifdef CONFIG_SELFMOD_TIMER
+	unsigned int timer_baseaddr = 0;
+	int arr_func[] = {
+				(int)&microblaze_read,
+				(int)&timer_interrupt,
+				(int)&microblaze_clocksource_init,
+				(int)&microblaze_timer_set_mode,
+				(int)&microblaze_timer_set_next_event,
+				0
+			};
+#endif
+	char *timer_list[] = {
+				"xlnx,xps-timer-1.00.a",
+				"xlnx,opb-timer-1.00.b",
+				"xlnx,opb-timer-1.00.a",
+				NULL
+			};
+
+	for (i = 0; timer_list[i] != NULL; i++) {
+		timer = of_find_compatible_node(NULL, NULL, timer_list[i]);
+		if (timer)
+			break;
+	}
+
+	timer_baseaddr = *(int *) of_get_property(timer, "reg", NULL);
+	timer_baseaddr = (unsigned long) ioremap(timer_baseaddr, PAGE_SIZE);
+	irq = *(int *) of_get_property(timer, "interrupts", NULL);
+	timer_num =
+		*(int *) of_get_property(timer, "xlnx,one-timer-only", NULL);
+	if (timer_num) {
+		printk(KERN_EMERG "Please enable two timers in HW\n");
+		BUG();
+	}
+
+#ifdef CONFIG_SELFMOD_TIMER
+	selfmod_function((int *) arr_func, timer_baseaddr);
+#endif
+	printk(KERN_INFO "%s #0 at 0x%08x, irq=%d\n",
+		timer_list[i], timer_baseaddr, irq);
+
+	cpuinfo.freq_div_hz = cpuinfo.cpu_clock_freq / HZ;
+
+	setup_irq(irq, &timer_irqaction);
+#ifdef CONFIG_HEART_BEAT
+	setup_heartbeat();
+#endif
+	microblaze_clocksource_init();
+	microblaze_clockevent_init();
+}
diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c
new file mode 100644
index 00000000000..293ef486013
--- /dev/null
+++ b/arch/microblaze/kernel/traps.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/kallsyms.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/debug_locks.h>
+
+#include <asm/exceptions.h>
+#include <asm/system.h>
+
+void trap_init(void)
+{
+	__enable_hw_exceptions();
+}
+
+void __bad_xchg(volatile void *ptr, int size)
+{
+	printk(KERN_INFO "xchg: bad data size: pc 0x%p, ptr 0x%p, size %d\n",
+		__builtin_return_address(0), ptr, size);
+	BUG();
+}
+EXPORT_SYMBOL(__bad_xchg);
+
+static int kstack_depth_to_print = 24;
+
+static int __init kstack_setup(char *s)
+{
+	kstack_depth_to_print = strict_strtoul(s, 0, NULL);
+
+	return 1;
+}
+__setup("kstack=", kstack_setup);
+
+void show_trace(struct task_struct *task, unsigned long *stack)
+{
+	unsigned long addr;
+
+	if (!stack)
+		stack = (unsigned long *)&stack;
+
+	printk(KERN_NOTICE "Call Trace: ");
+#ifdef CONFIG_KALLSYMS
+	printk(KERN_NOTICE "\n");
+#endif
+	while (!kstack_end(stack)) {
+		addr = *stack++;
+		/*
+		 * If the address is either in the text segment of the
+		 * kernel, or in the region which contains vmalloc'ed
+		 * memory, it *may* be the address of a calling
+		 * routine; if so, print it so that someone tracing
+		 * down the cause of the crash will be able to figure
+		 * out the call path that was taken.
+		 */
+		if (kernel_text_address(addr))
+			print_ip_sym(addr);
+	}
+	printk(KERN_NOTICE "\n");
+
+	if (!task)
+		task = current;
+
+	debug_show_held_locks(task);
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+	unsigned long *stack;
+	int i;
+
+	if (sp == NULL) {
+		if (task)
+			sp = (unsigned long *) ((struct thread_info *)
+						(task->stack))->cpu_context.r1;
+		else
+			sp = (unsigned long *)&sp;
+	}
+
+	stack = sp;
+
+	printk(KERN_INFO "\nStack:\n  ");
+
+	for (i = 0; i < kstack_depth_to_print; i++) {
+		if (kstack_end(sp))
+			break;
+		if (i && ((i % 8) == 0))
+			printk("\n  ");
+		printk("%08lx ", *sp++);
+	}
+	printk("\n");
+	show_trace(task, stack);
+}
+
+void dump_stack(void)
+{
+	show_stack(NULL, NULL);
+}
+EXPORT_SYMBOL(dump_stack);
diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
new file mode 100644
index 00000000000..840385e5129
--- /dev/null
+++ b/arch/microblaze/kernel/vmlinux.lds.S
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+OUTPUT_FORMAT("elf32-microblaze", "elf32-microblaze", "elf32-microblaze")
+OUTPUT_ARCH(microblaze)
+ENTRY(_start)
+
+#include <asm-generic/vmlinux.lds.h>
+
+jiffies = jiffies_64 + 4;
+
+SECTIONS {
+	. = CONFIG_KERNEL_BASE_ADDR;
+
+	.text : {
+		_text = . ;
+		_stext = . ;
+		*(.text .text.*)
+		*(.fixup)
+
+		*(.exitcall.exit)
+		SCHED_TEXT
+		LOCK_TEXT
+		KPROBES_TEXT
+		. = ALIGN (4) ;
+		_etext = . ;
+	}
+
+	. = ALIGN (4) ;
+	_fdt_start = . ; /* place for fdt blob */
+	. = . + 0x4000;
+	_fdt_end = . ;
+
+	. = ALIGN(16);
+	RODATA
+	. = ALIGN(16);
+	__ex_table : {
+		__start___ex_table = .;
+		*(__ex_table)
+		__stop___ex_table = .;
+	}
+
+	/*
+	 * sdata2 section can go anywhere, but must be word aligned
+	 * and SDA2_BASE must point to the middle of it
+	 */
+	.sdata2 : {
+		_ssrw = .;
+		. = ALIGN(4096); /* page aligned when MMU used - origin 0x8 */
+		*(.sdata2)
+	. = ALIGN(8);
+	_essrw = .;
+	_ssrw_size = _essrw - _ssrw;
+	_KERNEL_SDA2_BASE_ = _ssrw + (_ssrw_size / 2);
+	}
+
+	_sdata = . ;
+	.data ALIGN (4096) : { /* page aligned when MMU used - origin 0x4 */
+		*(.data)
+	}
+	. = ALIGN(32);
+	.data.cacheline_aligned : { *(.data.cacheline_aligned) }
+	_edata = . ;
+
+	/* Reserve some low RAM for r0 based memory references */
+	. = ALIGN(0x4) ;
+	r0_ram = . ;
+	. = . +  4096;	/* a page should be enough */
+
+	/* The initial task */
+	. = ALIGN(8192);
+	.data.init_task : { *(.data.init_task) }
+
+	/* Under the microblaze ABI, .sdata and .sbss must be contiguous */
+	. = ALIGN(8);
+	.sdata : {
+		_ssro = .;
+		*(.sdata)
+	}
+
+	.sbss :	{
+		_ssbss = .;
+		*(.sbss)
+		_esbss = .;
+		_essro = .;
+		_ssro_size = _essro - _ssro ;
+		_KERNEL_SDA_BASE_ = _ssro + (_ssro_size / 2) ;
+	}
+
+	__init_begin = .;
+
+	. = ALIGN(4096);
+	.init.text : {
+		_sinittext = . ;
+		*(.init.text)
+		*(.exit.text)
+		*(.exit.data)
+		_einittext = .;
+	}
+
+	.init.data : { *(.init.data) }
+
+	. = ALIGN(4);
+	.init.ivt : {
+		__ivt_start = .;
+		*(.init.ivt)
+		__ivt_end = .;
+	}
+
+	.init.setup : {
+		__setup_start = .;
+		*(.init.setup)
+		__setup_end = .;
+	}
+
+	.initcall.init : {
+		__initcall_start = .;
+		INITCALLS
+		__initcall_end = .;
+	}
+
+	.con_initcall.init : {
+		__con_initcall_start = .;
+		*(.con_initcall.init)
+		__con_initcall_end = .;
+	}
+
+	__init_end_before_initramfs = .;
+
+	.init.ramfs ALIGN(4096) : {
+		__initramfs_start = .;
+		*(.init.ramfs)
+		__initramfs_end = .;
+		. = ALIGN(4);
+		LONG(0);
+/*
+ * FIXME this can break initramfs for MMU.
+ * Pad init.ramfs up to page boundary,
+ * so that __init_end == __bss_start. This will make image.elf
+ * consistent with the image.bin
+ */
+		/* . = ALIGN(4096); */
+	}
+	__init_end = .;
+
+	.bss ALIGN (4096) : { /* page aligned when MMU used */
+		__bss_start = . ;
+			*(.bss*)
+			*(COMMON)
+		. = ALIGN (4) ;
+		__bss_stop = . ;
+		_ebss = . ;
+	}
+	. = ALIGN(4096);
+	_end = .;
+}