[PATCH] CRIS update: new subarchitecture v32

New CRIS sub architecture named v32.

From: Dave Jones <davej@redhat.com>

	Fix swapped kmalloc args

Signed-off-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 448 insertions, 0 deletions

diff --git a/arch/cris/arch-v32/kernel/head.S b/arch/cris/arch-v32/kernel/head.S
new file mode 100644
index 00000000000..3cfe57dc391
--- /dev/null
+++ b/arch/cris/arch-v32/kernel/head.S
@@ -0,0 +1,448 @@
+/*
+ * CRISv32 kernel startup code.
+ *
+ * Copyright (C) 2003, Axis Communications AB
+ */
+
+#include <linux/config.h>
+
+#define ASSEMBLER_MACROS_ONLY
+
+/*
+ * The macros found in mmu_defs_asm.h uses the ## concatenation operator, so
+ * -traditional must not be used when assembling this file.
+ */
+#include <asm/arch/hwregs/reg_rdwr.h>
+#include <asm/arch/hwregs/asm/mmu_defs_asm.h>
+#include <asm/arch/hwregs/asm/reg_map_asm.h>
+#include <asm/arch/hwregs/asm/config_defs_asm.h>
+#include <asm/arch/hwregs/asm/bif_core_defs_asm.h>
+
+#define CRAMFS_MAGIC 0x28cd3d45
+#define RAM_INIT_MAGIC 0x56902387
+#define COMMAND_LINE_MAGIC 0x87109563
+
+	;; NOTE: R8 and R9 carry information from the decompressor (if the
+	;; kernel was compressed). They must not be used in the code below
+	;; until they are read!
+
+	;; Exported symbols.
+	.global etrax_irv
+	.global romfs_start
+	.global romfs_length
+	.global romfs_in_flash
+	.global swapper_pg_dir
+	.global crisv32_nand_boot
+	.global crisv32_nand_cramfs_offset
+
+	;; Dummy section to make it bootable with current VCS simulator
+#ifdef CONFIG_ETRAXFS_SIM
+	.section ".boot", "ax"
+	ba tstart
+	nop
+#endif
+
+	.text
+tstart:
+	;; This is the entry point of the kernel. The CPU is currently in
+	;; supervisor mode.
+	;;
+	;; 0x00000000 if flash.
+	;; 0x40004000 if DRAM.
+	;;
+	di
+
+	;; Start clocks for used blocks.
+	move.d REG_ADDR(config, regi_config, rw_clk_ctrl), $r1
+	move.d [$r1], $r0
+	or.d   REG_STATE(config, rw_clk_ctrl, cpu, yes) | \
+	       REG_STATE(config, rw_clk_ctrl, bif, yes) | \
+	       REG_STATE(config, rw_clk_ctrl, fix_io, yes), $r0
+	move.d $r0, [$r1]
+
+	;; Set up waitstates etc
+	move.d   REG_ADDR(bif_core, regi_bif_core, rw_grp1_cfg), $r0
+	move.d   CONFIG_ETRAX_MEM_GRP1_CONFIG, $r1
+	move.d   $r1, [$r0]
+	move.d   REG_ADDR(bif_core, regi_bif_core, rw_grp2_cfg), $r0
+	move.d   CONFIG_ETRAX_MEM_GRP2_CONFIG, $r1
+	move.d   $r1, [$r0]
+	move.d   REG_ADDR(bif_core, regi_bif_core, rw_grp3_cfg), $r0
+	move.d   CONFIG_ETRAX_MEM_GRP3_CONFIG, $r1
+	move.d   $r1, [$r0]
+	move.d   REG_ADDR(bif_core, regi_bif_core, rw_grp4_cfg), $r0
+	move.d   CONFIG_ETRAX_MEM_GRP4_CONFIG, $r1
+	move.d   $r1, [$r0]
+
+#ifdef CONFIG_ETRAXFS_SIM
+	;; Set up minimal flash waitstates
+	move.d 0, $r10
+	move.d REG_ADDR(bif_core, regi_bif_core, rw_grp1_cfg), $r11
+	move.d $r10, [$r11]
+#endif
+
+	;; Setup and enable the MMU. Use same configuration for both the data
+	;; and the instruction MMU.
+	;;
+	;; Note; 3 cycles is needed for a bank-select to take effect. Further;
+	;; bank 1 is the instruction MMU, bank 2 is the data MMU.
+#ifndef CONFIG_ETRAXFS_SIM
+	move.d	REG_FIELD(mmu, rw_mm_kbase_hi, base_e, 8)	\
+		| REG_FIELD(mmu, rw_mm_kbase_hi, base_c, 4)	\
+		| REG_FIELD(mmu, rw_mm_kbase_hi, base_b, 0xb), $r0
+#else
+	;; Map the virtual DRAM to the RW eprom area at address 0.
+	;; Also map 0xa for the hook calls,
+	move.d	REG_FIELD(mmu, rw_mm_kbase_hi, base_e, 8)	\
+		| REG_FIELD(mmu, rw_mm_kbase_hi, base_c, 0)	\
+		| REG_FIELD(mmu, rw_mm_kbase_hi, base_b, 0xb)   \
+		| REG_FIELD(mmu, rw_mm_kbase_hi, base_a, 0xa), $r0
+#endif
+
+	;; Temporary map of 0x40 -> 0x40 and 0x00 -> 0x00.
+	move.d	REG_FIELD(mmu, rw_mm_kbase_lo, base_4, 4)  \
+		| REG_FIELD(mmu, rw_mm_kbase_lo, base_0, 0), $r1
+
+	;; Enable certain page protections and setup linear mapping
+	;; for f,e,c,b,4,0.
+#ifndef CONFIG_ETRAXFS_SIM
+	move.d	REG_STATE(mmu, rw_mm_cfg, we, on)		\
+		| REG_STATE(mmu, rw_mm_cfg, acc, on)		\
+		| REG_STATE(mmu, rw_mm_cfg, ex, on)		\
+		| REG_STATE(mmu, rw_mm_cfg, inv, on)		\
+		| REG_STATE(mmu, rw_mm_cfg, seg_f, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_e, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_d, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_c, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_b, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_a, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_9, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_8, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_7, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_6, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_5, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_4, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_3, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_2, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_1, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_0, linear), $r2
+#else
+	move.d	REG_STATE(mmu, rw_mm_cfg, we, on)		\
+		| REG_STATE(mmu, rw_mm_cfg, acc, on)		\
+		| REG_STATE(mmu, rw_mm_cfg, ex, on)		\
+		| REG_STATE(mmu, rw_mm_cfg, inv, on)		\
+		| REG_STATE(mmu, rw_mm_cfg, seg_f, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_e, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_d, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_c, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_b, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_a, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_9, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_8, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_7, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_6, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_5, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_4, linear)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_3, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_2, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_1, page)	\
+		| REG_STATE(mmu, rw_mm_cfg, seg_0, linear), $r2
+#endif
+
+	;; Update instruction MMU.
+	move	1, $srs
+	nop
+	nop
+	nop
+	move	$r0, $s2	; kbase_hi.
+	move	$r1, $s1	; kbase_lo.
+	move	$r2, $s0	; mm_cfg, virtual memory configuration.
+
+	;; Update data MMU.
+	move	2, $srs
+	nop
+	nop
+	nop
+	move	$r0, $s2	; kbase_hi.
+	move	$r1, $s1	; kbase_lo
+	move	$r2, $s0	; mm_cfg, virtual memory configuration.
+
+	;; Enable data and instruction MMU.
+	move	0, $srs
+	moveq	0xf, $r0	;  IMMU, DMMU, DCache, Icache on
+	nop
+	nop
+	nop
+	move	$r0, $s0
+	nop
+	nop
+	nop
+
+#ifdef CONFIG_SMP
+	;; Read CPU ID
+	move    0, $srs
+	nop
+	nop
+	nop
+	move    $s10, $r0
+	cmpq    0, $r0
+	beq	master_cpu
+	nop
+slave_cpu:
+	; A slave waits for cpu_now_booting to be equal to CPU ID.
+	move.d	cpu_now_booting, $r1
+slave_wait:
+	cmp.d	[$r1], $r0
+	bne	slave_wait
+	nop
+	; Time to boot-up. Get stack location provided by master CPU.
+	move.d  smp_init_current_idle_thread, $r1
+	move.d  [$r1], $sp
+	add.d	8192, $sp
+	move.d	ebp_start, $r0	; Defined in linker-script.
+	move	$r0, $ebp
+	jsr	smp_callin
+	nop
+master_cpu:
+#endif
+#ifndef CONFIG_ETRAXFS_SIM
+	;; Check if starting from DRAM or flash.
+	lapcq	., $r0
+	and.d	0x7fffffff, $r0 ; Mask off the non-cache bit.
+	cmp.d	0x10000, $r0	; Arbitrary, something above this code.
+	blo	_inflash0
+	nop
+#endif
+
+	jump	_inram		; Jump to cached RAM.
+	nop
+
+	;; Jumpgate.
+_inflash0:
+	jump _inflash
+	nop
+
+	;; Put the following in a section so that storage for it can be
+	;; reclaimed after init is finished.
+	.section ".init.text", "ax"
+
+_inflash:
+
+	;; Initialize DRAM.
+	cmp.d	RAM_INIT_MAGIC, $r8 ; Already initialized?
+	beq	_dram_initialized
+	nop
+
+#include "../lib/dram_init.S"
+
+_dram_initialized:
+	;; Copy the text and data section to DRAM. This depends on that the
+	;; variables used below are correctly set up by the linker script.
+	;; The calculated value stored in R4 is used below.
+	moveq	0, $r0		; Source.
+	move.d	text_start, $r1	; Destination.
+	move.d	__vmlinux_end, $r2
+	move.d	$r2, $r4
+	sub.d	$r1, $r4
+1:	move.w	[$r0+], $r3
+	move.w	$r3, [$r1+]
+	cmp.d	$r2, $r1
+	blo	1b
+	nop
+
+	;; Keep CRAMFS in flash.
+	moveq	0, $r0
+	move.d	romfs_length, $r1
+	move.d	$r0, [$r1]
+	move.d	[$r4], $r0	; cramfs_super.magic
+	cmp.d	CRAMFS_MAGIC, $r0
+	bne 1f
+	nop
+
+	addoq	+4, $r4, $acr
+	move.d	[$acr], $r0
+	move.d	romfs_length, $r1
+	move.d	$r0, [$r1]
+	add.d	0xf0000000, $r4	; Add cached flash start in virtual memory.
+	move.d	romfs_start, $r1
+	move.d	$r4, [$r1]
+1:	moveq	1, $r0
+	move.d	romfs_in_flash, $r1
+	move.d	$r0, [$r1]
+
+	jump	_start_it	; Jump to cached code.
+	nop
+
+_inram:
+	;; Check if booting from NAND flash (in that case we just remember the offset
+	;; into the flash where cramfs should be).
+	move.d	REG_ADDR(config, regi_config, r_bootsel), $r0
+	move.d	[$r0], $r0
+	and.d	REG_MASK(config, r_bootsel, boot_mode), $r0
+	cmp.d	REG_STATE(config, r_bootsel, boot_mode, nand), $r0
+	bne	move_cramfs
+	moveq	1,$r0
+	move.d	crisv32_nand_boot, $r1
+	move.d	$r0, [$r1]
+	move.d	crisv32_nand_cramfs_offset, $r1
+	move.d	$r9, [$r1]
+	moveq	1, $r0
+	move.d	romfs_in_flash, $r1
+	move.d	$r0, [$r1]
+	jump	_start_it
+	nop
+
+move_cramfs:
+	;; Move the cramfs after BSS.
+	moveq	0, $r0
+	move.d	romfs_length, $r1
+	move.d	$r0, [$r1]
+
+#ifndef CONFIG_ETRAXFS_SIM
+	;; The kernel could have been unpacked to DRAM by the loader, but
+	;; the cramfs image could still be inte the flash immediately
+	;; following the compressed kernel image. The loaded passes the address
+	;; of the bute succeeding the last compressed byte in the flash in
+	;; register R9 when starting the kernel.
+	cmp.d	0x0ffffff8, $r9
+	bhs	_no_romfs_in_flash ; R9 points outside the flash area.
+	nop
+#else
+	ba _no_romfs_in_flash
+	nop
+#endif
+	move.d	[$r9], $r0	; cramfs_super.magic
+	cmp.d	CRAMFS_MAGIC, $r0
+	bne	_no_romfs_in_flash
+	nop
+
+	addoq	+4, $r9, $acr
+	move.d	[$acr], $r0
+	move.d	romfs_length, $r1
+	move.d	$r0, [$r1]
+	add.d	0xf0000000, $r9	; Add cached flash start in virtual memory.
+	move.d	romfs_start, $r1
+	move.d	$r9, [$r1]
+	moveq	1, $r0
+	move.d	romfs_in_flash, $r1
+	move.d	$r0, [$r1]
+
+	jump	_start_it	; Jump to cached code.
+	nop
+
+_no_romfs_in_flash:
+	;; Look for cramfs.
+#ifndef CONFIG_ETRAXFS_SIM
+	move.d	__vmlinux_end, $r0
+#else
+	move.d	__end, $r0
+#endif
+	move.d	[$r0], $r1
+	cmp.d	CRAMFS_MAGIC, $r1
+	bne	2f
+	nop
+
+	addoq	+4, $r0, $acr
+	move.d	[$acr], $r2
+	move.d	_end, $r1
+	move.d	romfs_start, $r3
+	move.d	$r1, [$r3]
+	move.d	romfs_length, $r3
+	move.d	$r2, [$r3]
+
+#ifndef CONFIG_ETRAXFS_SIM
+	add.d	$r2, $r0
+	add.d	$r2, $r1
+
+	lsrq	1, $r2		; Size is in bytes, we copy words.
+	addq    1, $r2
+1:
+	move.w	[$r0], $r3
+	move.w	$r3, [$r1]
+	subq	2, $r0
+	subq	2, $r1
+	subq	1, $r2
+	bne	1b
+	nop
+#endif
+
+2:
+	moveq	0, $r0
+	move.d	romfs_in_flash, $r1
+	move.d	$r0, [$r1]
+
+	jump	_start_it	; Jump to cached code.
+	nop
+
+_start_it:
+
+	;; Check if kernel command line is supplied
+	cmp.d	COMMAND_LINE_MAGIC, $r10
+	bne	no_command_line
+	nop
+
+	move.d	256, $r13
+	move.d  cris_command_line, $r10
+	or.d	0x80000000, $r11 ; Make it virtual
+1:
+	move.b  [$r11+], $r12
+	move.b  $r12, [$r10+]
+	subq	1, $r13
+	bne	1b
+	nop
+
+no_command_line:
+
+	;; The kernel stack contains a task structure for each task. This
+	;; the initial kernel stack is in the same page as the init_task,
+	;; but starts at the top of the page, i.e. + 8192 bytes.
+	move.d	init_thread_union + 8192, $sp
+	move.d	ebp_start, $r0	; Defined in linker-script.
+	move	$r0, $ebp
+	move.d	etrax_irv, $r1	; Set the exception base register and pointer.
+	move.d	$r0, [$r1]
+
+#ifndef CONFIG_ETRAXFS_SIM
+	;; Clear the BSS region from _bss_start to _end.
+	move.d	__bss_start, $r0
+	move.d	_end, $r1
+1:	clear.d	[$r0+]
+	cmp.d	$r1, $r0
+	blo 1b
+	nop
+#endif
+
+#ifdef CONFIG_ETRAXFS_SIM
+	/* Set the watchdog timeout to something big. Will be removed when */
+	/* watchdog can be disabled with command line option */
+	move.d  0x7fffffff, $r10
+	jsr     CPU_WATCHDOG_TIMEOUT
+	nop
+#endif
+
+	; Initialize registers to increase determinism
+	move.d __bss_start, $r0
+	movem [$r0], $r13
+
+	jump	start_kernel	; Jump to start_kernel() in init/main.c.
+	nop
+
+	.data
+etrax_irv:
+	.dword 0
+romfs_start:
+	.dword 0
+romfs_length:
+	.dword 0
+romfs_in_flash:
+	.dword 0
+crisv32_nand_boot:
+	.dword 0
+crisv32_nand_cramfs_offset:
+	.dword 0
+
+swapper_pg_dir = 0xc0002000
+
+	.section ".init.data", "aw"
+
+#include "../lib/hw_settings.S"