Merge branch 'devicetree/for-x86' of git://git.secretlab.ca/git/linux-2.6 into x86/platform

Reason: x86 devicetree support for ce4100 depends on those device tree
	changes scheduled for .39.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

16 files changed, 226 insertions, 51 deletions

diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 22b2e0e3861..cedee2bcbd1 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_GPIO_TXX9)		+= gpio_txx9.o
 obj-$(CONFIG_KEXEC)		+= machine_kexec.o relocate_kernel.o
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 obj-$(CONFIG_SPINLOCK_TEST)	+= spinlock_test.o
+obj-$(CONFIG_MIPS_MACHINE)	+= mips_machine.o
 
 obj-$(CONFIG_OF)		+= prom.o
 
@@ -106,4 +107,6 @@ obj-$(CONFIG_MIPS_CPUFREQ)	+= cpufreq/
 
 obj-$(CONFIG_HW_PERF_EVENTS)	+= perf_event.o
 
+obj-$(CONFIG_JUMP_LABEL)	+= jump_label.o
+
 CPPFLAGS_vmlinux.lds		:= $(KBUILD_CFLAGS)
diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c
index 2f4d7a99bcc..98c5a9737c1 100644
--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -32,7 +32,7 @@ static int mips_next_event(unsigned long delta,
 	cnt = read_c0_count();
 	cnt += delta;
 	write_c0_compare(cnt);
-	res = ((int)(read_c0_count() - cnt) > 0) ? -ETIME : 0;
+	res = ((int)(read_c0_count() - cnt) >= 0) ? -ETIME : 0;
 	return res;
 }
 
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 71620e19827..f65d4c8c65a 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -739,6 +739,8 @@ static inline unsigned int decode_config4(struct cpuinfo_mips *c)
 	    && cpu_has_tlb)
 		c->tlbsize += (config4 & MIPS_CONF4_MMUSIZEEXT) * 0x40;
 
+	c->kscratch_mask = (config4 >> 16) & 0xff;
+
 	return config4 & MIPS_CONF_M;
 }
 
@@ -905,7 +907,8 @@ static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu)
 {
 	decode_configs(c);
 	switch (c->processor_id & 0xff00) {
-	case PRID_IMP_BMIPS32:
+	case PRID_IMP_BMIPS32_REV4:
+	case PRID_IMP_BMIPS32_REV8:
 		c->cputype = CPU_BMIPS32;
 		__cpu_name[cpu] = "Broadcom BMIPS32";
 		break;
@@ -933,10 +936,6 @@ static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu)
 		__cpu_name[cpu] = "Broadcom BMIPS5000";
 		c->options |= MIPS_CPU_ULRI;
 		break;
-	case PRID_IMP_BMIPS4KC:
-		c->cputype = CPU_4KC;
-		__cpu_name[cpu] = "MIPS 4Kc";
-		break;
 	}
 }
 
diff --git a/arch/mips/kernel/jump_label.c b/arch/mips/kernel/jump_label.c
new file mode 100644
index 00000000000..6001610cfe5
--- /dev/null
+++ b/arch/mips/kernel/jump_label.c
@@ -0,0 +1,54 @@
+/*
+ * 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.
+ *
+ * Copyright (c) 2010 Cavium Networks, Inc.
+ */
+
+#include <linux/jump_label.h>
+#include <linux/kernel.h>
+#include <linux/memory.h>
+#include <linux/mutex.h>
+#include <linux/types.h>
+#include <linux/cpu.h>
+
+#include <asm/cacheflush.h>
+#include <asm/inst.h>
+
+#ifdef HAVE_JUMP_LABEL
+
+#define J_RANGE_MASK ((1ul << 28) - 1)
+
+void arch_jump_label_transform(struct jump_entry *e,
+			       enum jump_label_type type)
+{
+	union mips_instruction insn;
+	union mips_instruction *insn_p =
+		(union mips_instruction *)(unsigned long)e->code;
+
+	/* Jump only works within a 256MB aligned region. */
+	BUG_ON((e->target & ~J_RANGE_MASK) != (e->code & ~J_RANGE_MASK));
+
+	/* Target must have 4 byte alignment. */
+	BUG_ON((e->target & 3) != 0);
+
+	if (type == JUMP_LABEL_ENABLE) {
+		insn.j_format.opcode = j_op;
+		insn.j_format.target = (e->target & J_RANGE_MASK) >> 2;
+	} else {
+		insn.word = 0; /* nop */
+	}
+
+	get_online_cpus();
+	mutex_lock(&text_mutex);
+	*insn_p = insn;
+
+	flush_icache_range((unsigned long)insn_p,
+			   (unsigned long)insn_p + sizeof(*insn_p));
+
+	mutex_unlock(&text_mutex);
+	put_online_cpus();
+}
+
+#endif /* HAVE_JUMP_LABEL */
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 6343b4a5b83..876a75cc376 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -251,14 +251,15 @@ SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz,
 
 SYSCALL_DEFINE1(32_personality, unsigned long, personality)
 {
+	unsigned int p = personality & 0xffffffff;
 	int ret;
-	personality &= 0xffffffff;
+
 	if (personality(current->personality) == PER_LINUX32 &&
-	    personality == PER_LINUX)
-		personality = PER_LINUX32;
-	ret = sys_personality(personality);
-	if (ret == PER_LINUX32)
-		ret = PER_LINUX;
+	    personality(p) == PER_LINUX)
+		p = (p & ~PER_MASK) | PER_LINUX32;
+	ret = sys_personality(p);
+	if (ret != -1 && personality(ret) == PER_LINUX32)
+		ret = (ret & ~PER_MASK) | PER_LINUX;
 	return ret;
 }
 
diff --git a/arch/mips/kernel/mips_machine.c b/arch/mips/kernel/mips_machine.c
new file mode 100644
index 00000000000..411a058d2c5
--- /dev/null
+++ b/arch/mips/kernel/mips_machine.c
@@ -0,0 +1,86 @@
+/*
+ *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  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/mm.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include <asm/mips_machine.h>
+
+static struct mips_machine *mips_machine __initdata;
+static char *mips_machine_name = "Unknown";
+
+#define for_each_machine(mach) \
+	for ((mach) = (struct mips_machine *)&__mips_machines_start; \
+	     (mach) && \
+	     (unsigned long)(mach) < (unsigned long)&__mips_machines_end; \
+	     (mach)++)
+
+__init void mips_set_machine_name(const char *name)
+{
+	char *p;
+
+	if (name == NULL)
+		return;
+
+	p = kstrdup(name, GFP_KERNEL);
+	if (!p)
+		pr_err("MIPS: no memory for machine_name\n");
+
+	mips_machine_name = p;
+}
+
+char *mips_get_machine_name(void)
+{
+	return mips_machine_name;
+}
+
+__init int mips_machtype_setup(char *id)
+{
+	struct mips_machine *mach;
+
+	for_each_machine(mach) {
+		if (mach->mach_id == NULL)
+			continue;
+
+		if (strcmp(mach->mach_id, id) == 0) {
+			mips_machtype = mach->mach_type;
+			return 0;
+		}
+	}
+
+	pr_err("MIPS: no machine found for id '%s', supported machines:\n", id);
+	pr_err("%-24s %s\n", "id", "name");
+	for_each_machine(mach)
+		pr_err("%-24s %s\n", mach->mach_id, mach->mach_name);
+
+	return 1;
+}
+
+__setup("machtype=", mips_machtype_setup);
+
+__init void mips_machine_setup(void)
+{
+	struct mips_machine *mach;
+
+	for_each_machine(mach) {
+		if (mips_machtype == mach->mach_type) {
+			mips_machine = mach;
+			break;
+		}
+	}
+
+	if (!mips_machine)
+		return;
+
+	mips_set_machine_name(mips_machine->mach_name);
+	pr_info("MIPS: machine is %s\n", mips_machine_name);
+
+	if (mips_machine->mach_setup)
+		mips_machine->mach_setup();
+}
diff --git a/arch/mips/kernel/module.c b/arch/mips/kernel/module.c
index 6f51dda87fc..dd940b70196 100644
--- a/arch/mips/kernel/module.c
+++ b/arch/mips/kernel/module.c
@@ -30,6 +30,8 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
+#include <linux/jump_label.h>
+
 #include <asm/pgtable.h>	/* MODULE_START */
 
 struct mips_hi16 {
@@ -46,17 +48,9 @@ static DEFINE_SPINLOCK(dbe_lock);
 void *module_alloc(unsigned long size)
 {
 #ifdef MODULE_START
-	struct vm_struct *area;
-
-	size = PAGE_ALIGN(size);
-	if (!size)
-		return NULL;
-
-	area = __get_vm_area(size, VM_ALLOC, MODULE_START, MODULE_END);
-	if (!area)
-		return NULL;
-
-	return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
+	return __vmalloc_node_range(size, 1, MODULE_START, MODULE_END,
+				GFP_KERNEL, PAGE_KERNEL, -1,
+				__builtin_return_address(0));
 #else
 	if (size == 0)
 		return NULL;
@@ -390,6 +384,9 @@ int module_finalize(const Elf_Ehdr *hdr,
 	const Elf_Shdr *s;
 	char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
 
+	/* Make jump label nops. */
+	jump_label_apply_nops(me);
+
 	INIT_LIST_HEAD(&me->arch.dbe_list);
 	for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
 		if (strcmp("__dbe_table", secstrings + s->sh_name) != 0)
diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c
index 5c7c6fc0756..183e0d22666 100644
--- a/arch/mips/kernel/perf_event_mipsxx.c
+++ b/arch/mips/kernel/perf_event_mipsxx.c
@@ -1047,6 +1047,6 @@ init_hw_perf_events(void)
 
 	return 0;
 }
-arch_initcall(init_hw_perf_events);
+early_initcall(init_hw_perf_events);
 
 #endif /* defined(CONFIG_CPU_MIPS32)... */
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 26109c4d517..e309665b6c8 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -12,6 +12,7 @@
 #include <asm/cpu-features.h>
 #include <asm/mipsregs.h>
 #include <asm/processor.h>
+#include <asm/mips_machine.h>
 
 unsigned int vced_count, vcei_count;
 
@@ -31,8 +32,12 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 	/*
 	 * For the first processor also print the system type
 	 */
-	if (n == 0)
+	if (n == 0) {
 		seq_printf(m, "system type\t\t: %s\n", get_system_type());
+		if (mips_get_machine_name())
+			seq_printf(m, "machine\t\t\t: %s\n",
+				   mips_get_machine_name());
+	}
 
 	seq_printf(m, "processor\t\t: %ld\n", n);
 	sprintf(fmt, "cpu model\t\t: %%s V%%d.%%d%s\n",
@@ -69,6 +74,8 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		);
 	seq_printf(m, "shadow register sets\t: %d\n",
 		       cpu_data[n].srsets);
+	seq_printf(m, "kscratch registers\t: %d\n",
+		   hweight8(cpu_data[n].kscratch_mask));
 	seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core);
 
 	sprintf(fmt, "VCE%%c exceptions\t\t: %s\n",
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 99960940d4a..ae167df73dd 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -142,7 +142,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 	childregs->regs[7] = 0;	/* Clear error flag */
 
 	childregs->regs[2] = 0;	/* Child gets zero as return value */
-	regs->regs[2] = p->pid;
 
 	if (childregs->cp0_status & ST0_CU0) {
 		childregs->regs[28] = (unsigned long) ti;
diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index e000b278f02..a19811e98a4 100644
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -45,11 +45,9 @@ void __init free_mem_mach(unsigned long addr, unsigned long size)
 	return free_bootmem(addr, size);
 }
 
-u64 __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
+void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 {
-	return virt_to_phys(
-		__alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS))
-		);
+	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
@@ -100,7 +98,7 @@ void __init device_tree_init(void)
 		return;
 
 	base = virt_to_phys((void *)initial_boot_params);
-	size = initial_boot_params->totalsize;
+	size = be32_to_cpu(initial_boot_params->totalsize);
 
 	/* Before we do anything, lets reserve the dt blob */
 	reserve_mem_mach(base, size);
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index acd3f2c49c0..8ad1d5679f1 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -70,7 +70,7 @@ static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
  * mips_io_port_base is the begin of the address space to which x86 style
  * I/O ports are mapped.
  */
-const unsigned long mips_io_port_base __read_mostly = -1;
+const unsigned long mips_io_port_base = -1;
 EXPORT_SYMBOL(mips_io_port_base);
 
 static struct resource code_resource = { .name = "Kernel code", };
diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c
index 43e7cdc5ded..c0e81418ba2 100644
--- a/arch/mips/kernel/smp-mt.c
+++ b/arch/mips/kernel/smp-mt.c
@@ -153,7 +153,7 @@ static void __cpuinit vsmp_init_secondary(void)
 {
 	extern int gic_present;
 
-	/* This is Malta specific: IPI,performance and timer inetrrupts */
+	/* This is Malta specific: IPI,performance and timer interrupts */
 	if (gic_present)
 		change_c0_status(ST0_IM, STATUSF_IP3 | STATUSF_IP4 |
 					 STATUSF_IP6 | STATUSF_IP7);
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 8e9fbe75894..71350f7f2d8 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -83,7 +83,8 @@ extern asmlinkage void handle_mcheck(void);
 extern asmlinkage void handle_reserved(void);
 
 extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
-	struct mips_fpu_struct *ctx, int has_fpu);
+				    struct mips_fpu_struct *ctx, int has_fpu,
+				    void *__user *fault_addr);
 
 void (*board_be_init)(void);
 int (*board_be_handler)(struct pt_regs *regs, int is_fixup);
@@ -661,12 +662,36 @@ asmlinkage void do_ov(struct pt_regs *regs)
 	force_sig_info(SIGFPE, &info, current);
 }
 
+static int process_fpemu_return(int sig, void __user *fault_addr)
+{
+	if (sig == SIGSEGV || sig == SIGBUS) {
+		struct siginfo si = {0};
+		si.si_addr = fault_addr;
+		si.si_signo = sig;
+		if (sig == SIGSEGV) {
+			if (find_vma(current->mm, (unsigned long)fault_addr))
+				si.si_code = SEGV_ACCERR;
+			else
+				si.si_code = SEGV_MAPERR;
+		} else {
+			si.si_code = BUS_ADRERR;
+		}
+		force_sig_info(sig, &si, current);
+		return 1;
+	} else if (sig) {
+		force_sig(sig, current);
+		return 1;
+	} else {
+		return 0;
+	}
+}
+
 /*
  * XXX Delayed fp exceptions when doing a lazy ctx switch XXX
  */
 asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
 {
-	siginfo_t info;
+	siginfo_t info = {0};
 
 	if (notify_die(DIE_FP, "FP exception", regs, 0, regs_to_trapnr(regs), SIGFPE)
 	    == NOTIFY_STOP)
@@ -675,6 +700,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
 
 	if (fcr31 & FPU_CSR_UNI_X) {
 		int sig;
+		void __user *fault_addr = NULL;
 
 		/*
 		 * Unimplemented operation exception.  If we've got the full
@@ -690,7 +716,8 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
 		lose_fpu(1);
 
 		/* Run the emulator */
-		sig = fpu_emulator_cop1Handler(regs, &current->thread.fpu, 1);
+		sig = fpu_emulator_cop1Handler(regs, &current->thread.fpu, 1,
+					       &fault_addr);
 
 		/*
 		 * We can't allow the emulated instruction to leave any of
@@ -702,8 +729,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
 		own_fpu(1);	/* Using the FPU again.  */
 
 		/* If something went wrong, signal */
-		if (sig)
-			force_sig(sig, current);
+		process_fpemu_return(sig, fault_addr);
 
 		return;
 	} else if (fcr31 & FPU_CSR_INV_X)
@@ -996,11 +1022,11 @@ asmlinkage void do_cpu(struct pt_regs *regs)
 
 		if (!raw_cpu_has_fpu) {
 			int sig;
+			void __user *fault_addr = NULL;
 			sig = fpu_emulator_cop1Handler(regs,
-						&current->thread.fpu, 0);
-			if (sig)
-				force_sig(sig, current);
-			else
+						       &current->thread.fpu,
+						       0, &fault_addr);
+			if (!process_fpemu_return(sig, fault_addr))
 				mt_ase_fp_affinity();
 		}
 
@@ -1566,7 +1592,6 @@ void __cpuinit per_cpu_trap_init(void)
 #endif /* CONFIG_MIPS_MT_SMTC */
 
 	cpu_data[cpu].asid_cache = ASID_FIRST_VERSION;
-	TLBMISS_HANDLER_SETUP();
 
 	atomic_inc(&init_mm.mm_count);
 	current->active_mm = &init_mm;
@@ -1588,6 +1613,7 @@ void __cpuinit per_cpu_trap_init(void)
 		write_c0_wired(0);
 	}
 #endif /* CONFIG_MIPS_MT_SMTC */
+	TLBMISS_HANDLER_SETUP();
 }
 
 /* Install CPU exception handler */
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index f25df73db92..570607b376b 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -98,6 +98,13 @@ SECTIONS
 	INIT_TEXT_SECTION(PAGE_SIZE)
 	INIT_DATA_SECTION(16)
 
+	. = ALIGN(4);
+	.mips.machines.init : AT(ADDR(.mips.machines.init) - LOAD_OFFSET) {
+		__mips_machines_start = .;
+		*(.mips.machines.init)
+		__mips_machines_end = .;
+	}
+
 	/* .exit.text is discarded at runtime, not link time, to deal with
 	 * references from .rodata
 	 */
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index 3eb3cde2f66..6a1fdfef8fd 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -1092,6 +1092,10 @@ static int vpe_open(struct inode *inode, struct file *filp)
 
 	/* this of-course trashes what was there before... */
 	v->pbuffer = vmalloc(P_SIZE);
+	if (!v->pbuffer) {
+		pr_warning("VPE loader: unable to allocate memory\n");
+		return -ENOMEM;
+	}
 	v->plen = P_SIZE;
 	v->load_addr = NULL;
 	v->len = 0;
@@ -1149,10 +1153,9 @@ static int vpe_release(struct inode *inode, struct file *filp)
 	if (ret < 0)
 		v->shared_ptr = NULL;
 
-	// cleanup any temp buffers
-	if (v->pbuffer)
-		vfree(v->pbuffer);
+	vfree(v->pbuffer);
 	v->plen = 0;
+
 	return ret;
 }
 
@@ -1169,11 +1172,6 @@ static ssize_t vpe_write(struct file *file, const char __user * buffer,
 	if (v == NULL)
 		return -ENODEV;
 
-	if (v->pbuffer == NULL) {
-		printk(KERN_ERR "VPE loader: no buffer for program\n");
-		return -ENOMEM;
-	}
-
 	if ((count + v->len) > v->plen) {
 		printk(KERN_WARNING
 		       "VPE loader: elf size too big. Perhaps strip uneeded symbols\n");