/* *  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 <asm/assembler.h>#include <asm/constants.h>#include <asm/procinfo.h>/* * Function: arm6_7_cache_clean_invalidate_all (void) *	   : arm6_7_cache_clean_invalidate_page (unsigned long address, int size, int flags) * * Params  : address	Area start address *	   : size	size of area *	   : flags	b0 = I cache as well * * Purpose : Flush all cache lines */ENTRY(cpu_arm6_cache_clean_invalidate_all)ENTRY(cpu_arm7_cache_clean_invalidate_all)ENTRY(cpu_arm6_cache_clean_invalidate_range)ENTRY(cpu_arm7_cache_clean_invalidate_range)ENTRY(cpu_arm6_icache_invalidate_range)ENTRY(cpu_arm7_icache_invalidate_range)ENTRY(cpu_arm6_icache_invalidate_page)ENTRY(cpu_arm7_icache_invalidate_page)ENTRY(cpu_arm6_dcache_clean_range)ENTRY(cpu_arm7_dcache_clean_range)ENTRY(cpu_arm6_dcache_invalidate_range)ENTRY(cpu_arm7_dcache_invalidate_range)		mov	r0, #0		mcr	p15, 0, r0, c7, c0, 0		@ flush cacheENTRY(cpu_arm6_dcache_clean_page)ENTRY(cpu_arm7_dcache_clean_page)ENTRY(cpu_arm6_dcache_clean_entry)ENTRY(cpu_arm7_dcache_clean_entry)ENTRY(cpu_arm6_flush_ram_page)ENTRY(cpu_arm7_flush_ram_page)		mov	pc, lr/* * Function: arm6_7_tlb_invalidate_all (void) * * Purpose : flush all TLB entries in all caches */ENTRY(cpu_arm6_tlb_invalidate_all)ENTRY(cpu_arm7_tlb_invalidate_all)		mov	r0, #0		mcr	p15, 0, r0, c5, c0, 0		@ flush TLB		mov	pc, lr/* * Function: arm6_7_tlb_invalidate_page (unsigned long address, int end, int flags) * * Params  : address	Area start address *	   : end	Area end address *	   : flags	b0 = I cache as well * * Purpose : flush a TLB entry */ENTRY(cpu_arm6_tlb_invalidate_range)                @ arm 6 tbl purge reg is bits 12 - 311:		mcr	p15, 0, r0, c6, c0, 0		@ purge TLB		add	r0, r0, #4096		cmp	r0, r1		blt	1b		mov	pc, lrENTRY(cpu_arm7_tlb_invalidate_range)#if defined(CONFIG_ARCH_RISCSTATION)		mov	r0, #0		mcr	p15, 0, r0, c5, c0, 0		@ flush TLB		mov	pc, lr#else                @ arm 7 tbl purge reg is bits 14 - 311:		mcr	p15, 0, r0, c6, c0, 0		@ purge TLB		add	r0, r0, #0x4000		cmp	r0, r1		blt	1b		mov	pc, lr#endif/* * Function: arm6_7_tlb_invalidate_page (unsigned long address, int flags) * * Params  : address	Address *	   : flags	b0 = I-TLB as well * * Purpose : flush a TLB entry */ENTRY(cpu_arm6_tlb_invalidate_page)ENTRY(cpu_arm7_tlb_invalidate_page)		mcr	p15, 0, r0, c6, c0, 0		@ flush TLB		mov	pc, lr/* * Function: arm6_7_data_abort () * * Params  : r0 = address of aborted instruction * * Purpose : obtain information about current aborted instruction * * Returns : r0 = address of abort *	   : r1 != 0 if writing *	   : r3 = FSR *	   : sp = pointer to registers */ENTRY(cpu_arm6_data_abort)		ldr	r4, [r0]			@ read instruction causing problem		tst	r4, r4, lsr #21			@ C = bit 20		sbc	r1, r1, r1			@ r1 = C - 1		and	r2, r4, #14 << 24		teq	r2, #8 << 24			@ was it ldm/stm		bne	Ldata_simpleLdata_ldmstm:	tst	r4, #1 << 21			@ check writeback bit		beq	Ldata_simple		mov	r7, #0x11		orr	r7, r7, r7, lsl #8		and	r0, r4, r7		and	r2, r4, r7, lsl #1		add	r0, r0, r2, lsr #1		and	r2, r4, r7, lsl #2		add	r0, r0, r2, lsr #2		and	r2, r4, r7, lsl #3		add	r0, r0, r2, lsr #3		add	r0, r0, r0, lsr #8		add	r0, r0, r0, lsr #4		and	r7, r0, #15			@ r7 = no. of registers to transfer.		and	r5, r4, #15 << 16		@ Get Rn		ldr	r0, [sp, r5, lsr #14]		@ Get register		tst	r4, #1 << 23			@ U bit		subne	r7, r0, r7, lsl #2		addeq	r7, r0, r7, lsl #2		@ Do correction (signed)Ldata_saver7:	str	r7, [sp, r5, lsr #14]		@ Put registerLdata_simple:	mrc	p15, 0, r0, c6, c0, 0		@ get FAR		mrc	p15, 0, r3, c5, c0, 0		@ get FSR		and	r3, r3, #255		mov	pc, lrENTRY(cpu_arm7_data_abort)		ldr	r4, [r0]			@ read instruction causing problem		tst	r4, r4, lsr #21			@ C = bit 20		sbc	r1, r1, r1			@ r1 = C - 1		and	r2, r4, #15 << 24		add	pc, pc, r2, lsr #22		@ Now branch to the relevent processing routine		movs	pc, lr		b	Ldata_unknown		b	Ldata_simple			@ swp		b	Ldata_unknown		b	Ldata_unknown		b	Ldata_lateldrpostconst		@ ldr	rd, [rn], #m		b	Ldata_lateldrpreconst		@ ldr	rd, [rn, #m]	@ RegVal		b	Ldata_lateldrpostreg		@ ldr	rd, [rn], rm		b	Ldata_lateldrprereg		@ ldr	rd, [rn, rm]		b	Ldata_ldmstm			@ ldm*a	rn, <rlist>		b	Ldata_ldmstm			@ ldm*b	rn, <rlist>		b	Ldata_unknown		b	Ldata_unknown		b	Ldata_simple			@ ldc	rd, [rn], #m	@ Same as ldr	rd, [rn], #m		b	Ldata_simple			@ ldc	rd, [rn, #m]		b	Ldata_unknownLdata_unknown:	@ Part of jumptable		mov	r0, r2		mov	r1, r4		mov	r2, r5		bl	baddataabort		b	ret_from_exceptionLdata_lateldrpreconst:		tst	r4, #1 << 21			@ check writeback bit		beq	Ldata_simpleLdata_lateldrpostconst:		movs	r2, r4, lsl #20			@ Get offset		beq	Ldata_simple		and	r5, r4, #15 << 16		@ Get Rn		ldr	r0, [sp, r5, lsr #14]		tst	r4, #1 << 23			@ U bit		subne	r7, r0, r2, lsr #20		addeq	r7, r0, r2, lsr #20		b	Ldata_saver7Ldata_lateldrprereg:		tst	r4, #1 << 21			@ check writeback bit		beq	Ldata_simpleLdata_lateldrpostreg:		and	r5, r4, #15		ldr	r2, [sp, r5, lsl #2]		@ Get Rm		mov	r3, r4, lsr #7		ands	r3, r3, #31		and	r6, r4, #0x70		orreq	r6, r6, #8		add	pc, pc, r6		mov	r0, r0		mov	r2, r2, lsl r3			@ 0: LSL #!0		b	1f		b	1f				@ 1: LSL #0		mov	r0, r0		b	1f				@ 2: MUL?		mov	r0, r0		b	1f				@ 3: MUL?		mov	r0, r0		mov	r2, r2, lsr r3			@ 4: LSR #!0		b	1f		mov	r2, r2, lsr #32			@ 5: LSR #32		b	1f		b	1f				@ 6: MUL?		mov	r0, r0		b	1f				@ 7: MUL?		mov	r0, r0		mov	r2, r2, asr r3			@ 8: ASR #!0		b	1f		mov	r2, r2, asr #32			@ 9: ASR #32		b	1f		b	1f				@ A: MUL?		mov	r0, r0		b	1f				@ B: MUL?		mov	r0, r0		mov	r2, r2, ror r3			@ C: ROR #!0		b	1f		mov	r2, r2, rrx			@ D: RRX		b	1f		mov	r0, r0				@ E: MUL?		mov	r0, r0		mov	r0, r0				@ F: MUL?1:		and	r5, r4, #15 << 16		@ Get Rn		ldr	r0, [sp, r5, lsr #14]		tst	r4, #1 << 23			@ U bit		subne	r7, r0, r2		addeq	r7, r0, r2		b	Ldata_saver7/* * Function: arm6_7_check_bugs (void) *	   : arm6_7_proc_init (void) *	   : arm6_7_proc_fin (void) * * Notes   : This processor does not require these */ENTRY(cpu_arm6_check_bugs)ENTRY(cpu_arm7_check_bugs)		mrs	ip, cpsr		bic	ip, ip, #F_BIT		msr	cpsr, ip		mov	pc, lrENTRY(cpu_arm6_proc_init)ENTRY(cpu_arm7_proc_init)		mov	pc, lrENTRY(cpu_arm6_proc_fin)ENTRY(cpu_arm7_proc_fin)		mov	r0, #F_BIT | 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, lrENTRY(cpu_arm6_do_idle)ENTRY(cpu_arm7_do_idle)		mov	pc, lr/* * Function: arm6_7_set_pgd(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_set_pgd)ENTRY(cpu_arm7_set_pgd)		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_set_pmd () * * Params  : r0 = Address to set *	   : r1 = value to set * * Purpose : Set a PMD and flush it out of any WB cache */ENTRY(cpu_arm6_set_pmd)		and	r2, r1, #11		teq	r2, #1		teqne	r2, #9		teqne	r2, #10		orreq	r1, r1, #16			@ Updatable = 1 if Page table/Cacheable section		str	r1, [r0]		mov	pc, lr/* * Function: arm7_set_pmd () * * Params  : r0 = Address to set *	   : r1 = value to set * * Purpose : Set a PMD and flush it out of any WB cache */ENTRY(cpu_arm7_set_pmd)		tst	r1, #3		orrne	r1, r1, #16			@ Updatable bit is always set on ARM7		str	r1, [r0]		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	5ENTRY(cpu_arm6_set_pte)ENTRY(cpu_arm7_set_pte)		str	r1, [r0], #-1024		@ linux version		eor	r1, r1, #LPTE_PRESENT | LPTE_YOUNG | LPTE_WRITE | LPTE_DIRTY		bic	r2, r1, #0xff0		bic	r2, r2, #3		orr	r2, r2, #HPTE_TYPE_SMALL		tst	r1, #LPTE_USER | LPTE_EXEC	@ User or Exec?		orrne	r2, r2, #HPTE_AP_READ		tst	r1, #LPTE_WRITE | LPTE_DIRTY	@ Write and Dirty?		orreq	r2, r2, #HPTE_AP_WRITE		tst	r1, #LPTE_PRESENT | LPTE_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, r0cpu_arm6_name:	.asciz	"ARM 6"cpu_arm610_name:		.asciz	"ARM 610"cpu_arm7_name:	.asciz	"ARM 7"cpu_arm710_name:		.asciz	"ARM 710"		.align		.section ".text.init", #alloc, #execinstr__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		mcr	p15, 0, r4, c2, c0		@ load page table pointer		mov	r0, #0x1f			@ Domains 0, 1 = client		mcr	p15, 0, r0, c3, c0		@ load domain access register		mov	r0, #0x3d			@ . ..RS BLDP WCAM		orr	r0, r0, #0x100			@ . ..01 0011 1101		mov	pc, lr__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, r4, c2, c0		@ load page table pointer		mov	r0, #0x1f			@ Domains 0, 1 = client		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/* * Purpose : Function pointers used to access above functions - all calls *	     come through these */		.type	arm6_processor_functions, #objectENTRY(arm6_processor_functions)		.word	cpu_arm6_data_abort		.word	cpu_arm6_check_bugs		.word	cpu_arm6_proc_init		.word	cpu_arm6_proc_fin		.word	cpu_arm6_reset		.word	cpu_arm6_do_idle		/* cache */		.word	cpu_arm6_cache_clean_invalidate_all		.word	cpu_arm6_cache_clean_invalidate_range		.word	cpu_arm6_flush_ram_page		/* dcache */		.word	cpu_arm6_dcache_invalidate_range		.word	cpu_arm6_dcache_clean_range		.word	cpu_arm6_dcache_clean_page		.word	cpu_arm6_dcache_clean_entry		/* icache */		.word	cpu_arm6_icache_invalidate_range		.word	cpu_arm6_icache_invalidate_page		/* tlb */		.word	cpu_arm6_tlb_invalidate_all		.word	cpu_arm6_tlb_invalidate_range		.word	cpu_arm6_tlb_invalidate_page		/* pgtable */		.word	cpu_arm6_set_pgd		.word	cpu_arm6_set_pmd		.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, #objectENTRY(arm7_processor_functions)		.word	cpu_arm7_data_abort		.word	cpu_arm7_check_bugs		.word	cpu_arm7_proc_init		.word	cpu_arm7_proc_fin		.word	cpu_arm7_reset		.word	cpu_arm7_do_idle		/* cache */		.word	cpu_arm7_cache_clean_invalidate_all		.word	cpu_arm7_cache_clean_invalidate_range		.word	cpu_arm7_flush_ram_page		/* dcache */		.word	cpu_arm7_dcache_invalidate_range		.word	cpu_arm7_dcache_clean_range		.word	cpu_arm7_dcache_clean_page		.word	cpu_arm7_dcache_clean_entry		/* icache */		.word	cpu_arm7_icache_invalidate_range		.word	cpu_arm7_icache_invalidate_page		/* tlb */		.word	cpu_arm7_tlb_invalidate_all		.word	cpu_arm7_tlb_invalidate_range		.word	cpu_arm7_tlb_invalidate_page		/* pgtable */		.word	cpu_arm7_set_pgd		.word	cpu_arm7_set_pmd		.word	cpu_arm7_set_pte		.size	arm7_processor_functions, . - arm7_processor_functions		.type	cpu_arm6_info, #objectcpu_arm6_info:		.long	0		.long	cpu_arm6_name		.size	cpu_arm6_info, . - cpu_arm6_info		.type	cpu_arm610_info, #objectcpu_arm610_info:		.long	0		.long	cpu_arm610_name		.size	cpu_arm610_info, . - cpu_Arm610_info		.type	cpu_arm7_info, #objectcpu_arm7_info:		.long	0		.long	cpu_arm7_name		.size	cpu_arm7_info, . - cpu_arm7_info		.type	cpu_arm710_info, #objectcpu_arm710_info:		.long	0		.long	cpu_arm710_name		.size	cpu_arm710_info, . - cpu_arm710_info		.type	cpu_arch_name, #objectcpu_arch_name:	.asciz	"armv3"		.size	cpu_arch_name, . - cpu_arch_name		.type	cpu_elf_name, #objectcpu_elf_name:	.asciz	"v3"		.size	cpu_elf_name, . - cpu_elf_name		.align		.section ".proc.info", #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_info		.long	arm6_processor_functions		.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_info		.long	arm6_processor_functions		.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_info		.long	arm7_processor_functions		.size	__arm7_proc_info, . - __arm7_proc_info		.type	__arm710_proc_info, #object__arm710_proc_info:		.long	0x41007100		.long	0xfff8ff00		.long	0x00000c1e		b	__arm7_setup		.long	cpu_arch_name		.long	cpu_elf_name		.long	HWCAP_SWP | HWCAP_26BIT		.long	cpu_arm710_info		.long	arm7_processor_functions		.size	__arm710_proc_info, . - __arm710_proc_info