arch/arm/mm/proc-arm6_7.S - kernel/msm-4.19 - Gitiles

 /*
  *  linux/arch/arm/mm/proc-arm6,7.S
  *
  *  Copyright (C) 1997-2000 Russell King
  *
  * 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.
  *
  *  These are the low level assembler for performing cache and TLB
  *  functions on the ARM610 & ARM710.
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
 #include <asm/pgtable.h>
 #include <asm/procinfo.h>
 #include <asm/ptrace.h>

 ENTRY(cpu_arm6_dcache_clean_area)
 ENTRY(cpu_arm7_dcache_clean_area)
 		mov	pc, lr

 /*
  * Function: arm6_7_data_abort ()
  *
  * Params  : r2 = address of aborted instruction
  *	   : sp = pointer to registers
  *
  * Purpose : obtain information about current aborted instruction
  *
  * Returns : r0 = address of abort
  *	   : r1 = FSR
  */

 ENTRY(cpu_arm7_data_abort)
 	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
 	mrc	p15, 0, r0, c6, c0, 0		@ get FAR
 	ldr	r8, [r0]			@ read arm instruction
 	tst	r8, #1 << 20			@ L = 0 -> write?
 	orreq	r1, r1, #1 << 11		@ yes.
 	and	r7, r8, #15 << 24
 	add	pc, pc, r7, lsr #22		@ Now branch to the relevant processing routine
 	nop

 /* 0 */	b	.data_unknown
 /* 1 */	mov	pc, lr				@ swp
 /* 2 */	b	.data_unknown
 /* 3 */	b	.data_unknown
 /* 4 */	b	.data_arm_lateldrpostconst	@ ldr	rd, [rn], #m
 /* 5 */	b	.data_arm_lateldrpreconst	@ ldr	rd, [rn, #m]
 /* 6 */	b	.data_arm_lateldrpostreg	@ ldr	rd, [rn], rm
 /* 7 */	b	.data_arm_lateldrprereg		@ ldr	rd, [rn, rm]
 /* 8 */	b	.data_arm_ldmstm		@ ldm*a	rn, <rlist>
 /* 9 */	b	.data_arm_ldmstm		@ ldm*b	rn, <rlist>
 /* a */	b	.data_unknown
 /* b */	b	.data_unknown
 /* c */	mov	pc, lr				@ ldc	rd, [rn], #m	@ Same as ldr	rd, [rn], #m
 /* d */	mov	pc, lr				@ ldc	rd, [rn, #m]
 /* e */	b	.data_unknown
 /* f */
 .data_unknown:	@ Part of jumptable
 	mov	r0, r2
 	mov	r1, r8
 	mov	r2, sp
 	bl	baddataabort
 	b	ret_from_exception

 ENTRY(cpu_arm6_data_abort)
 	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
 	mrc	p15, 0, r0, c6, c0, 0		@ get FAR
 	ldr	r8, [r2]			@ read arm instruction
 	tst	r8, #1 << 20			@ L = 0 -> write?
 	orreq	r1, r1, #1 << 11		@ yes.
 	and	r7, r8, #14 << 24
 	teq	r7, #8 << 24			@ was it ldm/stm
 	movne	pc, lr

 .data_arm_ldmstm:
 	tst	r8, #1 << 21			@ check writeback bit
 	moveq	pc, lr				@ no writeback -> no fixup
 	mov	r7, #0x11
 	orr	r7, r7, #0x1100
 	and	r6, r8, r7
 	and	r2, r8, r7, lsl #1
 	add	r6, r6, r2, lsr #1
 	and	r2, r8, r7, lsl #2
 	add	r6, r6, r2, lsr #2
 	and	r2, r8, r7, lsl #3
 	add	r6, r6, r2, lsr #3
 	add	r6, r6, r6, lsr #8
 	add	r6, r6, r6, lsr #4
 	and	r6, r6, #15			@ r6 = no. of registers to transfer.
 	and	r5, r8, #15 << 16		@ Extract 'n' from instruction
 	ldr	r7, [sp, r5, lsr #14]		@ Get register 'Rn'
 	tst	r8, #1 << 23			@ Check U bit
 	subne	r7, r7, r6, lsl #2		@ Undo increment
 	addeq	r7, r7, r6, lsl #2		@ Undo decrement
 	str	r7, [sp, r5, lsr #14]		@ Put register 'Rn'
 	mov	pc, lr

 .data_arm_apply_r6_and_rn:
 	and	r5, r8, #15 << 16		@ Extract 'n' from instruction
 	ldr	r7, [sp, r5, lsr #14]		@ Get register 'Rn'
 	tst	r8, #1 << 23			@ Check U bit
 	subne	r7, r7, r6			@ Undo incrmenet
 	addeq	r7, r7, r6			@ Undo decrement
 	str	r7, [sp, r5, lsr #14]		@ Put register 'Rn'
 	mov	pc, lr

 .data_arm_lateldrpreconst:
 	tst	r8, #1 << 21			@ check writeback bit
 	moveq	pc, lr				@ no writeback -> no fixup
 .data_arm_lateldrpostconst:
 	movs	r2, r8, lsl #20			@ Get offset
 	moveq	pc, lr				@ zero -> no fixup
 	and	r5, r8, #15 << 16		@ Extract 'n' from instruction
 	ldr	r7, [sp, r5, lsr #14]		@ Get register 'Rn'
 	tst	r8, #1 << 23			@ Check U bit
 	subne	r7, r7, r2, lsr #20		@ Undo increment
 	addeq	r7, r7, r2, lsr #20		@ Undo decrement
 	str	r7, [sp, r5, lsr #14]		@ Put register 'Rn'
 	mov	pc, lr

 .data_arm_lateldrprereg:
 	tst	r8, #1 << 21			@ check writeback bit
 	moveq	pc, lr				@ no writeback -> no fixup
 .data_arm_lateldrpostreg:
 	and	r7, r8, #15			@ Extract 'm' from instruction
 	ldr	r6, [sp, r7, lsl #2]		@ Get register 'Rm'
 	mov	r5, r8, lsr #7			@ get shift count
 	ands	r5, r5, #31
 	and	r7, r8, #0x70			@ get shift type
 	orreq	r7, r7, #8			@ shift count = 0
 	add	pc, pc, r7
 	nop

 	mov	r6, r6, lsl r5			@ 0: LSL #!0
 	b	.data_arm_apply_r6_and_rn
 	b	.data_arm_apply_r6_and_rn	@ 1: LSL #0
 	nop
 	b	.data_unknown			@ 2: MUL?
 	nop
 	b	.data_unknown			@ 3: MUL?
 	nop
 	mov	r6, r6, lsr r5			@ 4: LSR #!0
 	b	.data_arm_apply_r6_and_rn
 	mov	r6, r6, lsr #32			@ 5: LSR #32
 	b	.data_arm_apply_r6_and_rn
 	b	.data_unknown			@ 6: MUL?
 	nop
 	b	.data_unknown			@ 7: MUL?
 	nop
 	mov	r6, r6, asr r5			@ 8: ASR #!0
 	b	.data_arm_apply_r6_and_rn
 	mov	r6, r6, asr #32			@ 9: ASR #32
 	b	.data_arm_apply_r6_and_rn
 	b	.data_unknown			@ A: MUL?
 	nop
 	b	.data_unknown			@ B: MUL?
 	nop
 	mov	r6, r6, ror r5			@ C: ROR #!0
 	b	.data_arm_apply_r6_and_rn
 	mov	r6, r6, rrx			@ D: RRX
 	b	.data_arm_apply_r6_and_rn
 	b	.data_unknown			@ E: MUL?
 	nop
 	b	.data_unknown			@ F: MUL?

 /*
  * Function: arm6_7_proc_init (void)
  *	   : arm6_7_proc_fin (void)
  *
  * Notes   : This processor does not require these
  */
 ENTRY(cpu_arm6_proc_init)
 ENTRY(cpu_arm7_proc_init)
 		mov	pc, lr

 ENTRY(cpu_arm6_proc_fin)
 ENTRY(cpu_arm7_proc_fin)
 		mov	r0, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
 		msr	cpsr_c, r0
 		mov	r0, #0x31			@ ....S..DP...M
 		mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 		mov	pc, lr

 ENTRY(cpu_arm6_do_idle)
 ENTRY(cpu_arm7_do_idle)
 		mov	pc, lr

 /*
  * Function: arm6_7_switch_mm(unsigned long pgd_phys)
  * Params  : pgd_phys	Physical address of page table
  * Purpose : Perform a task switch, saving the old processes state, and restoring
  *	     the new.
  */
 ENTRY(cpu_arm6_switch_mm)
 ENTRY(cpu_arm7_switch_mm)
 		mov	r1, #0
 		mcr	p15, 0, r1, c7, c0, 0		@ flush cache
 		mcr	p15, 0, r0, c2, c0, 0		@ update page table ptr
 		mcr	p15, 0, r1, c5, c0, 0		@ flush TLBs
 		mov	pc, lr

 /*
  * Function: arm6_7_set_pte(pte_t *ptep, pte_t pte)
  * Params  : r0 = Address to set
  *	   : r1 = value to set
  * Purpose : Set a PTE and flush it out of any WB cache
  */
 		.align	5
 ENTRY(cpu_arm6_set_pte)
 ENTRY(cpu_arm7_set_pte)
 		str	r1, [r0], #-2048		@ linux version

 		eor	r1, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY

 		bic	r2, r1, #PTE_SMALL_AP_MASK
 		bic	r2, r2, #PTE_TYPE_MASK
 		orr	r2, r2, #PTE_TYPE_SMALL

 		tst	r1, #L_PTE_USER			@ User?
 		orrne	r2, r2, #PTE_SMALL_AP_URO_SRW

 		tst	r1, #L_PTE_WRITE | L_PTE_DIRTY	@ Write and Dirty?
 		orreq	r2, r2, #PTE_SMALL_AP_UNO_SRW

 		tst	r1, #L_PTE_PRESENT | L_PTE_YOUNG	@ Present and Young
 		movne	r2, #0

 		str	r2, [r0]			@ hardware version
 		mov	pc, lr

 /*
  * Function: _arm6_7_reset
  * Params  : r0 = address to jump to
  * Notes   : This sets up everything for a reset
  */
 ENTRY(cpu_arm6_reset)
 ENTRY(cpu_arm7_reset)
 		mov	r1, #0
 		mcr	p15, 0, r1, c7, c0, 0		@ flush cache
 		mcr	p15, 0, r1, c5, c0, 0		@ flush TLB
 		mov	r1, #0x30
 		mcr	p15, 0, r1, c1, c0, 0		@ turn off MMU etc
 		mov	pc, r0

 		__INIT

 		.type	__arm6_setup, #function
 __arm6_setup:	mov	r0, #0
 		mcr	p15, 0, r0, c7, c0		@ flush caches on v3
 		mcr	p15, 0, r0, c5, c0		@ flush TLBs on v3
 		mov	r0, #0x3d			@ . ..RS BLDP WCAM
 		orr	r0, r0, #0x100			@ . ..01 0011 1101
 		mov	pc, lr
 		.size	__arm6_setup, . - __arm6_setup

 		.type	__arm7_setup, #function
 __arm7_setup:	mov	r0, #0
 		mcr	p15, 0, r0, c7, c0		@ flush caches on v3
 		mcr	p15, 0, r0, c5, c0		@ flush TLBs on v3
 		mcr	p15, 0, r0, c3, c0		@ load domain access register
 		mov	r0, #0x7d			@ . ..RS BLDP WCAM
 		orr	r0, r0, #0x100			@ . ..01 0111 1101
 		mov	pc, lr
 		.size	__arm7_setup, . - __arm7_setup

 		__INITDATA

 /*
  * Purpose : Function pointers used to access above functions - all calls
  *	     come through these
  */
 		.type	arm6_processor_functions, #object
 ENTRY(arm6_processor_functions)
 		.word	cpu_arm6_data_abort
 		.word	cpu_arm6_proc_init
 		.word	cpu_arm6_proc_fin
 		.word	cpu_arm6_reset
 		.word	cpu_arm6_do_idle
 		.word	cpu_arm6_dcache_clean_area
 		.word	cpu_arm6_switch_mm
 		.word	cpu_arm6_set_pte
 		.size	arm6_processor_functions, . - arm6_processor_functions

 /*
  * Purpose : Function pointers used to access above functions - all calls
  *	     come through these
  */
 		.type	arm7_processor_functions, #object
 ENTRY(arm7_processor_functions)
 		.word	cpu_arm7_data_abort
 		.word	cpu_arm7_proc_init
 		.word	cpu_arm7_proc_fin
 		.word	cpu_arm7_reset
 		.word	cpu_arm7_do_idle
 		.word	cpu_arm7_dcache_clean_area
 		.word	cpu_arm7_switch_mm
 		.word	cpu_arm7_set_pte
 		.size	arm7_processor_functions, . - arm7_processor_functions

 		.section ".rodata"

 		.type	cpu_arch_name, #object
 cpu_arch_name:	.asciz	"armv3"
 		.size	cpu_arch_name, . - cpu_arch_name

 		.type	cpu_elf_name, #object
 cpu_elf_name:	.asciz	"v3"
 		.size	cpu_elf_name, . - cpu_elf_name

 		.type	cpu_arm6_name, #object
 cpu_arm6_name:	.asciz	"ARM6"
 		.size	cpu_arm6_name, . - cpu_arm6_name

 		.type	cpu_arm610_name, #object
 cpu_arm610_name:
 		.asciz	"ARM610"
 		.size	cpu_arm610_name, . - cpu_arm610_name

 		.type	cpu_arm7_name, #object
 cpu_arm7_name:	.asciz	"ARM7"
 		.size	cpu_arm7_name, . - cpu_arm7_name

 		.type	cpu_arm710_name, #object
 cpu_arm710_name:
 		.asciz	"ARM710"
 		.size	cpu_arm710_name, . - cpu_arm710_name

 		.align

 		.section ".proc.info.init", #alloc, #execinstr

 		.type	__arm6_proc_info, #object
 __arm6_proc_info:
 		.long	0x41560600
 		.long	0xfffffff0
 		.long	0x00000c1e
 		b	__arm6_setup
 		.long	cpu_arch_name
 		.long	cpu_elf_name
 		.long	HWCAP_SWP | HWCAP_26BIT
 		.long	cpu_arm6_name
 		.long	arm6_processor_functions
 		.long	v3_tlb_fns
 		.long	v3_user_fns
 		.long	v3_cache_fns
 		.size	__arm6_proc_info, . - __arm6_proc_info

 		.type	__arm610_proc_info, #object
 __arm610_proc_info:
 		.long	0x41560610
 		.long	0xfffffff0
 		.long	0x00000c1e
 		b	__arm6_setup
 		.long	cpu_arch_name
 		.long	cpu_elf_name
 		.long	HWCAP_SWP | HWCAP_26BIT
 		.long	cpu_arm610_name
 		.long	arm6_processor_functions
 		.long	v3_tlb_fns
 		.long	v3_user_fns
 		.long	v3_cache_fns
 		.size	__arm610_proc_info, . - __arm610_proc_info

 		.type	__arm7_proc_info, #object
 __arm7_proc_info:
 		.long	0x41007000
 		.long	0xffffff00
 		.long	0x00000c1e
 		b	__arm7_setup
 		.long	cpu_arch_name
 		.long	cpu_elf_name
 		.long	HWCAP_SWP | HWCAP_26BIT
 		.long	cpu_arm7_name
 		.long	arm7_processor_functions
 		.long	v3_tlb_fns
 		.long	v3_user_fns
 		.long	v3_cache_fns
 		.size	__arm7_proc_info, . - __arm7_proc_info

 		.type	__arm710_proc_info, #object
 __arm710_proc_info:
 		.long	0x41007100
 		.long	0xfff8ff00
 		.long   PMD_TYPE_SECT | \
 			PMD_SECT_BUFFERABLE | \
 			PMD_SECT_CACHEABLE | \
 			PMD_BIT4 | \
 			PMD_SECT_AP_WRITE | \
 			PMD_SECT_AP_READ
 		b	__arm7_setup
 		.long	cpu_arch_name
 		.long	cpu_elf_name
 		.long	HWCAP_SWP | HWCAP_26BIT
 		.long	cpu_arm710_name
 		.long	arm7_processor_functions
 		.long	v3_tlb_fns
 		.long	v3_user_fns
 		.long	v3_cache_fns
 		.size	__arm710_proc_info, . - __arm710_proc_info
	/*
	* linux/arch/arm/mm/proc-arm6,7.S
	*
	* Copyright (C) 1997-2000 Russell King
	*
	* 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.
	*
	* These are the low level assembler for performing cache and TLB
	* functions on the ARM610 & ARM710.
	*/
	#include <linux/linkage.h>
	#include <linux/init.h>
	#include <asm/assembler.h>
	#include <asm/asm-offsets.h>
	#include <asm/pgtable.h>
	#include <asm/procinfo.h>
	#include <asm/ptrace.h>

	ENTRY(cpu_arm6_dcache_clean_area)
	ENTRY(cpu_arm7_dcache_clean_area)
	mov pc, lr

	/*
	* Function: arm6_7_data_abort ()
	*
	* Params : r2 = address of aborted instruction
	* : sp = pointer to registers
	*
	* Purpose : obtain information about current aborted instruction
	*
	* Returns : r0 = address of abort
	* : r1 = FSR
	*/

	ENTRY(cpu_arm7_data_abort)
	mrc p15, 0, r1, c5, c0, 0 @ get FSR
	mrc p15, 0, r0, c6, c0, 0 @ get FAR
	ldr r8, [r0] @ read arm instruction
	tst r8, #1 << 20 @ L = 0 -> write?
	orreq r1, r1, #1 << 11 @ yes.
	and r7, r8, #15 << 24
	add pc, pc, r7, lsr #22 @ Now branch to the relevant processing routine
	nop

	/* 0 */ b .data_unknown
	/* 1 */ mov pc, lr @ swp
	/* 2 */ b .data_unknown
	/* 3 */ b .data_unknown
	/* 4 */ b .data_arm_lateldrpostconst @ ldr rd, [rn], #m
	/* 5 */ b .data_arm_lateldrpreconst @ ldr rd, [rn, #m]
	/* 6 */ b .data_arm_lateldrpostreg @ ldr rd, [rn], rm
	/* 7 */ b .data_arm_lateldrprereg @ ldr rd, [rn, rm]
	/* 8 / b .data_arm_ldmstm @ ldma rn, <rlist>
	/* 9 / b .data_arm_ldmstm @ ldmb rn, <rlist>
	/* a */ b .data_unknown
	/* b */ b .data_unknown
	/* c */ mov pc, lr @ ldc rd, [rn], #m @ Same as ldr rd, [rn], #m
	/* d */ mov pc, lr @ ldc rd, [rn, #m]
	/* e */ b .data_unknown
	/* f */
	.data_unknown: @ Part of jumptable
	mov r0, r2
	mov r1, r8
	mov r2, sp
	bl baddataabort
	b ret_from_exception

	ENTRY(cpu_arm6_data_abort)
	mrc p15, 0, r1, c5, c0, 0 @ get FSR
	mrc p15, 0, r0, c6, c0, 0 @ get FAR
	ldr r8, [r2] @ read arm instruction
	tst r8, #1 << 20 @ L = 0 -> write?
	orreq r1, r1, #1 << 11 @ yes.
	and r7, r8, #14 << 24
	teq r7, #8 << 24 @ was it ldm/stm
	movne pc, lr

	.data_arm_ldmstm:
	tst r8, #1 << 21 @ check writeback bit
	moveq pc, lr @ no writeback -> no fixup
	mov r7, #0x11
	orr r7, r7, #0x1100
	and r6, r8, r7
	and r2, r8, r7, lsl #1
	add r6, r6, r2, lsr #1
	and r2, r8, r7, lsl #2
	add r6, r6, r2, lsr #2
	and r2, r8, r7, lsl #3
	add r6, r6, r2, lsr #3
	add r6, r6, r6, lsr #8
	add r6, r6, r6, lsr #4
	and r6, r6, #15 @ r6 = no. of registers to transfer.
	and r5, r8, #15 << 16 @ Extract 'n' from instruction
	ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
	tst r8, #1 << 23 @ Check U bit
	subne r7, r7, r6, lsl #2 @ Undo increment
	addeq r7, r7, r6, lsl #2 @ Undo decrement
	str r7, [sp, r5, lsr #14] @ Put register 'Rn'
	mov pc, lr

	.data_arm_apply_r6_and_rn:
	and r5, r8, #15 << 16 @ Extract 'n' from instruction
	ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
	tst r8, #1 << 23 @ Check U bit
	subne r7, r7, r6 @ Undo incrmenet
	addeq r7, r7, r6 @ Undo decrement
	str r7, [sp, r5, lsr #14] @ Put register 'Rn'
	mov pc, lr

	.data_arm_lateldrpreconst:
	tst r8, #1 << 21 @ check writeback bit
	moveq pc, lr @ no writeback -> no fixup
	.data_arm_lateldrpostconst:
	movs r2, r8, lsl #20 @ Get offset
	moveq pc, lr @ zero -> no fixup
	and r5, r8, #15 << 16 @ Extract 'n' from instruction
	ldr r7, [sp, r5, lsr #14] @ Get register 'Rn'
	tst r8, #1 << 23 @ Check U bit
	subne r7, r7, r2, lsr #20 @ Undo increment
	addeq r7, r7, r2, lsr #20 @ Undo decrement
	str r7, [sp, r5, lsr #14] @ Put register 'Rn'
	mov pc, lr

	.data_arm_lateldrprereg:
	tst r8, #1 << 21 @ check writeback bit
	moveq pc, lr @ no writeback -> no fixup
	.data_arm_lateldrpostreg:
	and r7, r8, #15 @ Extract 'm' from instruction
	ldr r6, [sp, r7, lsl #2] @ Get register 'Rm'
	mov r5, r8, lsr #7 @ get shift count
	ands r5, r5, #31
	and r7, r8, #0x70 @ get shift type
	orreq r7, r7, #8 @ shift count = 0
	add pc, pc, r7
	nop

	mov r6, r6, lsl r5 @ 0: LSL #!0
	b .data_arm_apply_r6_and_rn
	b .data_arm_apply_r6_and_rn @ 1: LSL #0
	nop
	b .data_unknown @ 2: MUL?
	nop
	b .data_unknown @ 3: MUL?
	nop
	mov r6, r6, lsr r5 @ 4: LSR #!0
	b .data_arm_apply_r6_and_rn
	mov r6, r6, lsr #32 @ 5: LSR #32
	b .data_arm_apply_r6_and_rn
	b .data_unknown @ 6: MUL?
	nop
	b .data_unknown @ 7: MUL?
	nop
	mov r6, r6, asr r5 @ 8: ASR #!0
	b .data_arm_apply_r6_and_rn
	mov r6, r6, asr #32 @ 9: ASR #32
	b .data_arm_apply_r6_and_rn
	b .data_unknown @ A: MUL?
	nop
	b .data_unknown @ B: MUL?
	nop
	mov r6, r6, ror r5 @ C: ROR #!0
	b .data_arm_apply_r6_and_rn
	mov r6, r6, rrx @ D: RRX
	b .data_arm_apply_r6_and_rn
	b .data_unknown @ E: MUL?
	nop
	b .data_unknown @ F: MUL?

	/*
	* Function: arm6_7_proc_init (void)
	* : arm6_7_proc_fin (void)
	*
	* Notes : This processor does not require these
	*/
	ENTRY(cpu_arm6_proc_init)
	ENTRY(cpu_arm7_proc_init)
	mov pc, lr

	ENTRY(cpu_arm6_proc_fin)
	ENTRY(cpu_arm7_proc_fin)
	mov r0, #PSR_F_BIT \| PSR_I_BIT \| SVC_MODE
	msr cpsr_c, r0
	mov r0, #0x31 @ ....S..DP...M
	mcr p15, 0, r0, c1, c0, 0 @ disable caches
	mov pc, lr

	ENTRY(cpu_arm6_do_idle)
	ENTRY(cpu_arm7_do_idle)
	mov pc, lr

	/*
	* Function: arm6_7_switch_mm(unsigned long pgd_phys)
	* Params : pgd_phys Physical address of page table
	* Purpose : Perform a task switch, saving the old processes state, and restoring
	* the new.
	*/
	ENTRY(cpu_arm6_switch_mm)
	ENTRY(cpu_arm7_switch_mm)
	mov r1, #0
	mcr p15, 0, r1, c7, c0, 0 @ flush cache
	mcr p15, 0, r0, c2, c0, 0 @ update page table ptr
	mcr p15, 0, r1, c5, c0, 0 @ flush TLBs
	mov pc, lr

	/*
	* Function: arm6_7_set_pte(pte_t *ptep, pte_t pte)
	* Params : r0 = Address to set
	* : r1 = value to set
	* Purpose : Set a PTE and flush it out of any WB cache
	*/
	.align 5
	ENTRY(cpu_arm6_set_pte)
	ENTRY(cpu_arm7_set_pte)
	str r1, [r0], #-2048 @ linux version

	eor r1, r1, #L_PTE_PRESENT \| L_PTE_YOUNG \| L_PTE_WRITE \| L_PTE_DIRTY

	bic r2, r1, #PTE_SMALL_AP_MASK
	bic r2, r2, #PTE_TYPE_MASK
	orr r2, r2, #PTE_TYPE_SMALL

	tst r1, #L_PTE_USER @ User?
	orrne r2, r2, #PTE_SMALL_AP_URO_SRW

	tst r1, #L_PTE_WRITE \| L_PTE_DIRTY @ Write and Dirty?
	orreq r2, r2, #PTE_SMALL_AP_UNO_SRW

	tst r1, #L_PTE_PRESENT \| L_PTE_YOUNG @ Present and Young
	movne r2, #0

	str r2, [r0] @ hardware version
	mov pc, lr

	/*
	* Function: _arm6_7_reset
	* Params : r0 = address to jump to
	* Notes : This sets up everything for a reset
	*/
	ENTRY(cpu_arm6_reset)
	ENTRY(cpu_arm7_reset)
	mov r1, #0
	mcr p15, 0, r1, c7, c0, 0 @ flush cache
	mcr p15, 0, r1, c5, c0, 0 @ flush TLB
	mov r1, #0x30
	mcr p15, 0, r1, c1, c0, 0 @ turn off MMU etc
	mov pc, r0

	__INIT

	.type __arm6_setup, #function
	__arm6_setup: mov r0, #0
	mcr p15, 0, r0, c7, c0 @ flush caches on v3
	mcr p15, 0, r0, c5, c0 @ flush TLBs on v3
	mov r0, #0x3d @ . ..RS BLDP WCAM
	orr r0, r0, #0x100 @ . ..01 0011 1101
	mov pc, lr
	.size __arm6_setup, . - __arm6_setup

	.type __arm7_setup, #function
	__arm7_setup: mov r0, #0
	mcr p15, 0, r0, c7, c0 @ flush caches on v3
	mcr p15, 0, r0, c5, c0 @ flush TLBs on v3
	mcr p15, 0, r0, c3, c0 @ load domain access register
	mov r0, #0x7d @ . ..RS BLDP WCAM
	orr r0, r0, #0x100 @ . ..01 0111 1101
	mov pc, lr
	.size __arm7_setup, . - __arm7_setup

	__INITDATA

	/*
	* Purpose : Function pointers used to access above functions - all calls
	* come through these
	*/
	.type arm6_processor_functions, #object
	ENTRY(arm6_processor_functions)
	.word cpu_arm6_data_abort
	.word cpu_arm6_proc_init
	.word cpu_arm6_proc_fin
	.word cpu_arm6_reset
	.word cpu_arm6_do_idle
	.word cpu_arm6_dcache_clean_area
	.word cpu_arm6_switch_mm
	.word cpu_arm6_set_pte
	.size arm6_processor_functions, . - arm6_processor_functions

	/*
	* Purpose : Function pointers used to access above functions - all calls
	* come through these
	*/
	.type arm7_processor_functions, #object
	ENTRY(arm7_processor_functions)
	.word cpu_arm7_data_abort
	.word cpu_arm7_proc_init
	.word cpu_arm7_proc_fin
	.word cpu_arm7_reset
	.word cpu_arm7_do_idle
	.word cpu_arm7_dcache_clean_area
	.word cpu_arm7_switch_mm
	.word cpu_arm7_set_pte
	.size arm7_processor_functions, . - arm7_processor_functions

	.section ".rodata"

	.type cpu_arch_name, #object
	cpu_arch_name: .asciz "armv3"
	.size cpu_arch_name, . - cpu_arch_name

	.type cpu_elf_name, #object
	cpu_elf_name: .asciz "v3"
	.size cpu_elf_name, . - cpu_elf_name

	.type cpu_arm6_name, #object
	cpu_arm6_name: .asciz "ARM6"
	.size cpu_arm6_name, . - cpu_arm6_name

	.type cpu_arm610_name, #object
	cpu_arm610_name:
	.asciz "ARM610"
	.size cpu_arm610_name, . - cpu_arm610_name

	.type cpu_arm7_name, #object
	cpu_arm7_name: .asciz "ARM7"
	.size cpu_arm7_name, . - cpu_arm7_name

	.type cpu_arm710_name, #object
	cpu_arm710_name:
	.asciz "ARM710"
	.size cpu_arm710_name, . - cpu_arm710_name

	.align

	.section ".proc.info.init", #alloc, #execinstr

	.type __arm6_proc_info, #object
	__arm6_proc_info:
	.long 0x41560600
	.long 0xfffffff0
	.long 0x00000c1e
	b __arm6_setup
	.long cpu_arch_name
	.long cpu_elf_name
	.long HWCAP_SWP \| HWCAP_26BIT
	.long cpu_arm6_name
	.long arm6_processor_functions
	.long v3_tlb_fns
	.long v3_user_fns
	.long v3_cache_fns
	.size __arm6_proc_info, . - __arm6_proc_info

	.type __arm610_proc_info, #object
	__arm610_proc_info:
	.long 0x41560610
	.long 0xfffffff0
	.long 0x00000c1e
	b __arm6_setup
	.long cpu_arch_name
	.long cpu_elf_name
	.long HWCAP_SWP \| HWCAP_26BIT
	.long cpu_arm610_name
	.long arm6_processor_functions
	.long v3_tlb_fns
	.long v3_user_fns
	.long v3_cache_fns
	.size __arm610_proc_info, . - __arm610_proc_info

	.type __arm7_proc_info, #object
	__arm7_proc_info:
	.long 0x41007000
	.long 0xffffff00
	.long 0x00000c1e
	b __arm7_setup
	.long cpu_arch_name
	.long cpu_elf_name
	.long HWCAP_SWP \| HWCAP_26BIT
	.long cpu_arm7_name
	.long arm7_processor_functions
	.long v3_tlb_fns
	.long v3_user_fns
	.long v3_cache_fns
	.size __arm7_proc_info, . - __arm7_proc_info

	.type __arm710_proc_info, #object
	__arm710_proc_info:
	.long 0x41007100
	.long 0xfff8ff00
	.long PMD_TYPE_SECT \| \
	PMD_SECT_BUFFERABLE \| \
	PMD_SECT_CACHEABLE \| \
	PMD_BIT4 \| \
	PMD_SECT_AP_WRITE \| \
	PMD_SECT_AP_READ
	b __arm7_setup
	.long cpu_arch_name
	.long cpu_elf_name
	.long HWCAP_SWP \| HWCAP_26BIT
	.long cpu_arm710_name
	.long arm7_processor_functions
	.long v3_tlb_fns
	.long v3_user_fns
	.long v3_cache_fns
	.size __arm710_proc_info, . - __arm710_proc_info