[deliverable/linux.git] / arch / arm / mm / proc-arm1026.S

/*
 *  linux/arch/arm/mm/proc-arm1026.S: MMU functions for ARM1026EJ-S
 *
 *  Copyright (C) 2000 ARM Limited
 *  Copyright (C) 2000 Deep Blue Solutions Ltd.
 *  hacked for non-paged-MM by Hyok S. Choi, 2003.
 *
 * 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.
 *
 *
 * These are the low level assembler for performing cache and TLB
 * functions on the ARM1026EJ-S.
 */
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/hwcap.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#include <asm/ptrace.h>

#include "proc-macros.S"

/*
 * This is the maximum size of an area which will be invalidated
 * using the single invalidate entry instructions.  Anything larger
 * than this, and we go for the whole cache.
 *
 * This value should be chosen such that we choose the cheapest
 * alternative.
 */
#define MAX_AREA_SIZE	32768

/*
 * The size of one data cache line.
 */
#define CACHE_DLINESIZE	32

/*
 * The number of data cache segments.
 */
#define CACHE_DSEGMENTS	16

/*
 * The number of lines in a cache segment.
 */
#define CACHE_DENTRIES	64

/*
 * This is the size at which it becomes more efficient to
 * clean the whole cache, rather than using the individual
 * cache line maintainence instructions.
 */
#define CACHE_DLIMIT	32768

	.text
/*
 * cpu_arm1026_proc_init()
 */
ENTRY(cpu_arm1026_proc_init)
	mov	pc, lr

/*
 * cpu_arm1026_proc_fin()
 */
ENTRY(cpu_arm1026_proc_fin)
	stmfd	sp!, {lr}
	mov	ip, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
	msr	cpsr_c, ip
	bl	arm1026_flush_kern_cache_all
	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
	bic	r0, r0, #0x1000 		@ ...i............
	bic	r0, r0, #0x000e 		@ ............wca.
	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
	ldmfd	sp!, {pc}

/*
 * cpu_arm1026_reset(loc)
 *
 * Perform a soft reset of the system.	Put the CPU into the
 * same state as it would be if it had been reset, and branch
 * to what would be the reset vector.
 *
 * loc: location to jump to for soft reset
 */
	.align	5
ENTRY(cpu_arm1026_reset)
	mov	ip, #0
	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
#ifdef CONFIG_MMU
	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
#endif
	mrc	p15, 0, ip, c1, c0, 0		@ ctrl register
	bic	ip, ip, #0x000f 		@ ............wcam
	bic	ip, ip, #0x1100 		@ ...i...s........
	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
	mov	pc, r0

/*
 * cpu_arm1026_do_idle()
 */
	.align	5
ENTRY(cpu_arm1026_do_idle)
	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
	mov	pc, lr

/* ================================= CACHE ================================ */

	.align	5
/*
 *	flush_user_cache_all()
 *
 *	Invalidate all cache entries in a particular address
 *	space.
 */
ENTRY(arm1026_flush_user_cache_all)
	/* FALLTHROUGH */
/*
 *	flush_kern_cache_all()
 *
 *	Clean and invalidate the entire cache.
 */
ENTRY(arm1026_flush_kern_cache_all)
	mov	r2, #VM_EXEC
	mov	ip, #0
__flush_whole_cache:
#ifndef CONFIG_CPU_DCACHE_DISABLE
1:	mrc	p15, 0, r15, c7, c14, 3		@ test, clean, invalidate
	bne	1b
#endif
	tst	r2, #VM_EXEC
#ifndef CONFIG_CPU_ICACHE_DISABLE
	mcrne	p15, 0, ip, c7, c5, 0		@ invalidate I cache
#endif
	mcrne	p15, 0, ip, c7, c10, 4		@ drain WB
	mov	pc, lr

/*
 *	flush_user_cache_range(start, end, flags)
 *
 *	Invalidate a range of cache entries in the specified
 *	address space.
 *
 *	- start	- start address (inclusive)
 *	- end	- end address (exclusive)
 *	- flags	- vm_flags for this space
 */
ENTRY(arm1026_flush_user_cache_range)
	mov	ip, #0
	sub	r3, r1, r0			@ calculate total size
	cmp	r3, #CACHE_DLIMIT
	bhs	__flush_whole_cache

#ifndef CONFIG_CPU_DCACHE_DISABLE
1:	mcr	p15, 0, r0, c7, c14, 1		@ clean+invalidate D entry
	add	r0, r0, #CACHE_DLINESIZE
	cmp	r0, r1
	blo	1b
#endif
	tst	r2, #VM_EXEC
#ifndef CONFIG_CPU_ICACHE_DISABLE
	mcrne	p15, 0, ip, c7, c5, 0		@ invalidate I cache
#endif
	mcrne	p15, 0, ip, c7, c10, 4		@ drain WB
	mov	pc, lr

/*
 *	coherent_kern_range(start, end)
 *
 *	Ensure coherency between the Icache and the Dcache in the
 *	region described by start.  If you have non-snooping
 *	Harvard caches, you need to implement this function.
 *
 *	- start	- virtual start address
 *	- end	- virtual end address
 */
ENTRY(arm1026_coherent_kern_range)
	/* FALLTHROUGH */
/*
 *	coherent_user_range(start, end)
 *
 *	Ensure coherency between the Icache and the Dcache in the
 *	region described by start.  If you have non-snooping
 *	Harvard caches, you need to implement this function.
 *
 *	- start	- virtual start address
 *	- end	- virtual end address
 */
ENTRY(arm1026_coherent_user_range)
	mov	ip, #0
	bic	r0, r0, #CACHE_DLINESIZE - 1
1:
#ifndef CONFIG_CPU_DCACHE_DISABLE
	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
#endif
#ifndef CONFIG_CPU_ICACHE_DISABLE
	mcr	p15, 0, r0, c7, c5, 1		@ invalidate I entry
#endif
	add	r0, r0, #CACHE_DLINESIZE
	cmp	r0, r1
	blo	1b
	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
	mov	pc, lr

/*
 *	flush_kern_dcache_area(void *addr, size_t size)
 *
 *	Ensure no D cache aliasing occurs, either with itself or
 *	the I cache
 *
 *	- addr	- kernel address
 *	- size	- region size
 */
ENTRY(arm1026_flush_kern_dcache_area)
	mov	ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
	add	r1, r0, r1
1:	mcr	p15, 0, r0, c7, c14, 1		@ clean+invalidate D entry
	add	r0, r0, #CACHE_DLINESIZE
	cmp	r0, r1
	blo	1b
#endif
	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
	mov	pc, lr

/*
 *	dma_inv_range(start, end)
 *
 *	Invalidate (discard) the specified virtual address range.
 *	May not write back any entries.  If 'start' or 'end'
 *	are not cache line aligned, those lines must be written
 *	back.
 *
 *	- start	- virtual start address
 *	- end	- virtual end address
 *
 * (same as v4wb)
 */
ENTRY(arm1026_dma_inv_range)
	mov	ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
	tst	r0, #CACHE_DLINESIZE - 1
	bic	r0, r0, #CACHE_DLINESIZE - 1
	mcrne	p15, 0, r0, c7, c10, 1		@ clean D entry
	tst	r1, #CACHE_DLINESIZE - 1
	mcrne	p15, 0, r1, c7, c10, 1		@ clean D entry
1:	mcr	p15, 0, r0, c7, c6, 1		@ invalidate D entry
	add	r0, r0, #CACHE_DLINESIZE
	cmp	r0, r1
	blo	1b
#endif
	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
	mov	pc, lr

/*
 *	dma_clean_range(start, end)
 *
 *	Clean the specified virtual address range.
 *
 *	- start	- virtual start address
 *	- end	- virtual end address
 *
 * (same as v4wb)
 */
ENTRY(arm1026_dma_clean_range)
	mov	ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
	bic	r0, r0, #CACHE_DLINESIZE - 1
1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
	add	r0, r0, #CACHE_DLINESIZE
	cmp	r0, r1
	blo	1b
#endif
	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
	mov	pc, lr

/*
 *	dma_flush_range(start, end)
 *
 *	Clean and invalidate the specified virtual address range.
 *
 *	- start	- virtual start address
 *	- end	- virtual end address
 */
ENTRY(arm1026_dma_flush_range)
	mov	ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
	bic	r0, r0, #CACHE_DLINESIZE - 1
1:	mcr	p15, 0, r0, c7, c14, 1		@ clean+invalidate D entry
	add	r0, r0, #CACHE_DLINESIZE
	cmp	r0, r1
	blo	1b
#endif
	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
	mov	pc, lr

/*
 *	dma_map_area(start, size, dir)
 *	- start	- kernel virtual start address
 *	- size	- size of region
 *	- dir	- DMA direction
 */
ENTRY(arm1026_dma_map_area)
	add	r1, r1, r0
	cmp	r2, #DMA_TO_DEVICE
	beq	arm1026_dma_clean_range
	bcs	arm1026_dma_inv_range
	b	arm1026_dma_flush_range
ENDPROC(arm1026_dma_map_area)

/*
 *	dma_unmap_area(start, size, dir)
 *	- start	- kernel virtual start address
 *	- size	- size of region
 *	- dir	- DMA direction
 */
ENTRY(arm1026_dma_unmap_area)
	mov	pc, lr
ENDPROC(arm1026_dma_unmap_area)

ENTRY(arm1026_cache_fns)
	.long	arm1026_flush_kern_cache_all
	.long	arm1026_flush_user_cache_all
	.long	arm1026_flush_user_cache_range
	.long	arm1026_coherent_kern_range
	.long	arm1026_coherent_user_range
	.long	arm1026_flush_kern_dcache_area
	.long	arm1026_dma_map_area
	.long	arm1026_dma_unmap_area
	.long	arm1026_dma_inv_range
	.long	arm1026_dma_clean_range
	.long	arm1026_dma_flush_range

	.align	5
ENTRY(cpu_arm1026_dcache_clean_area)
#ifndef CONFIG_CPU_DCACHE_DISABLE
	mov	ip, #0
1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
	add	r0, r0, #CACHE_DLINESIZE
	subs	r1, r1, #CACHE_DLINESIZE
	bhi	1b
#endif
	mov	pc, lr

/* =============================== PageTable ============================== */

/*
 * cpu_arm1026_switch_mm(pgd)
 *
 * Set the translation base pointer to be as described by pgd.
 *
 * pgd: new page tables
 */
	.align	5
ENTRY(cpu_arm1026_switch_mm)
#ifdef CONFIG_MMU
	mov	r1, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
1:	mrc	p15, 0, r15, c7, c14, 3		@ test, clean, invalidate
	bne	1b
#endif
#ifndef CONFIG_CPU_ICACHE_DISABLE
	mcr	p15, 0, r1, c7, c5, 0		@ invalidate I cache
#endif
	mcr	p15, 0, r1, c7, c10, 4		@ drain WB
	mcr	p15, 0, r0, c2, c0, 0		@ load page table pointer
	mcr	p15, 0, r1, c8, c7, 0		@ invalidate I & D TLBs
#endif
	mov	pc, lr
        
/*
 * cpu_arm1026_set_pte_ext(ptep, pte, ext)
 *
 * Set a PTE and flush it out
 */
	.align	5
ENTRY(cpu_arm1026_set_pte_ext)
#ifdef CONFIG_MMU
	armv3_set_pte_ext
	mov	r0, r0
#ifndef CONFIG_CPU_DCACHE_DISABLE
	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
#endif
#endif /* CONFIG_MMU */
	mov	pc, lr


	__INIT

	.type	__arm1026_setup, #function
__arm1026_setup:
	mov	r0, #0
	mcr	p15, 0, r0, c7, c7		@ invalidate I,D caches on v4
	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer on v4
#ifdef CONFIG_MMU
	mcr	p15, 0, r0, c8, c7		@ invalidate I,D TLBs on v4
	mcr	p15, 0, r4, c2, c0		@ load page table pointer
#endif
#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
	mov	r0, #4				@ explicitly disable writeback
	mcr	p15, 7, r0, c15, c0, 0
#endif
	adr	r5, arm1026_crval
	ldmia	r5, {r5, r6}
	mrc	p15, 0, r0, c1, c0		@ get control register v4
	bic	r0, r0, r5
	orr	r0, r0, r6
#ifdef CONFIG_CPU_CACHE_ROUND_ROBIN
	orr	r0, r0, #0x4000 		@ .R.. .... .... ....
#endif
	mov	pc, lr
	.size	__arm1026_setup, . - __arm1026_setup

	/*
	 *  R
	 * .RVI ZFRS BLDP WCAM
	 * .011 1001 ..11 0101
	 * 
	 */
	.type	arm1026_crval, #object
arm1026_crval:
	crval	clear=0x00007f3f, mmuset=0x00003935, ucset=0x00001934

	__INITDATA

/*
 * Purpose : Function pointers used to access above functions - all calls
 *	     come through these
 */
	.type	arm1026_processor_functions, #object
arm1026_processor_functions:
	.word	v5t_early_abort
	.word	legacy_pabort
	.word	cpu_arm1026_proc_init
	.word	cpu_arm1026_proc_fin
	.word	cpu_arm1026_reset
	.word	cpu_arm1026_do_idle
	.word	cpu_arm1026_dcache_clean_area
	.word	cpu_arm1026_switch_mm
	.word	cpu_arm1026_set_pte_ext
	.size	arm1026_processor_functions, . - arm1026_processor_functions

	.section .rodata

	.type	cpu_arch_name, #object
cpu_arch_name:
	.asciz	"armv5tej"
	.size	cpu_arch_name, . - cpu_arch_name

	.type	cpu_elf_name, #object
cpu_elf_name:
	.asciz	"v5"
	.size	cpu_elf_name, . - cpu_elf_name
	.align

	.type	cpu_arm1026_name, #object
cpu_arm1026_name:
	.asciz	"ARM1026EJ-S"
	.size	cpu_arm1026_name, . - cpu_arm1026_name

	.align

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

	.type	__arm1026_proc_info,#object
__arm1026_proc_info:
	.long	0x4106a260			@ ARM 1026EJ-S (v5TEJ)
	.long	0xff0ffff0
	.long   PMD_TYPE_SECT | \
		PMD_BIT4 | \
		PMD_SECT_AP_WRITE | \
		PMD_SECT_AP_READ
	.long   PMD_TYPE_SECT | \
		PMD_BIT4 | \
		PMD_SECT_AP_WRITE | \
		PMD_SECT_AP_READ
	b	__arm1026_setup
	.long	cpu_arch_name
	.long	cpu_elf_name
	.long	HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP|HWCAP_JAVA
	.long	cpu_arm1026_name
	.long	arm1026_processor_functions
	.long	v4wbi_tlb_fns
	.long	v4wb_user_fns
	.long	arm1026_cache_fns
	.size	__arm1026_proc_info, . - __arm1026_proc_info
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/arm/mm/proc-arm1026.S: MMU functions for ARM1026EJ-S
	3	*
	4	* Copyright (C) 2000 ARM Limited
	5	* Copyright (C) 2000 Deep Blue Solutions Ltd.
d090ddda	6	* hacked for non-paged-MM by Hyok S. Choi, 2003.
1da177e4 LT	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	*
	14	* These are the low level assembler for performing cache and TLB
	15	* functions on the ARM1026EJ-S.
	16	*/
	17	#include <linux/linkage.h>
1da177e4 LT	18	#include <linux/init.h>
1da177e4 LT	19	#include <asm/assembler.h>
e6ae744d	20	#include <asm/asm-offsets.h>
5ec9407d	21	#include <asm/hwcap.h>
74945c86	22	#include <asm/pgtable-hwdef.h>
1da177e4	23	#include <asm/pgtable.h>
1da177e4 LT	24	#include <asm/ptrace.h>
1da177e4 LT	25
00eb0f6b RK	26	#include "proc-macros.S"
00eb0f6b RK	27
1da177e4 LT	28	/*
	29	* This is the maximum size of an area which will be invalidated
	30	* using the single invalidate entry instructions. Anything larger
	31	* than this, and we go for the whole cache.
	32	*
	33	* This value should be chosen such that we choose the cheapest
	34	* alternative.
	35	*/
	36	#define MAX_AREA_SIZE 32768
	37
	38	/*
	39	* The size of one data cache line.
	40	*/
	41	#define CACHE_DLINESIZE 32
	42
	43	/*
	44	* The number of data cache segments.
	45	*/
	46	#define CACHE_DSEGMENTS 16
	47
	48	/*
	49	* The number of lines in a cache segment.
	50	*/
	51	#define CACHE_DENTRIES 64
	52
	53	/*
	54	* This is the size at which it becomes more efficient to
	55	* clean the whole cache, rather than using the individual
	56	* cache line maintainence instructions.
	57	*/
	58	#define CACHE_DLIMIT 32768
	59
	60	.text
	61	/*
	62	* cpu_arm1026_proc_init()
	63	*/
	64	ENTRY(cpu_arm1026_proc_init)
	65	mov pc, lr
	66
	67	/*
	68	* cpu_arm1026_proc_fin()
	69	*/
	70	ENTRY(cpu_arm1026_proc_fin)
	71	stmfd sp!, {lr}
	72	mov ip, #PSR_F_BIT \| PSR_I_BIT \| SVC_MODE
	73	msr cpsr_c, ip
	74	bl arm1026_flush_kern_cache_all
	75	mrc p15, 0, r0, c1, c0, 0 @ ctrl register
	76	bic r0, r0, #0x1000 @ ...i............
	77	bic r0, r0, #0x000e @ ............wca.
	78	mcr p15, 0, r0, c1, c0, 0 @ disable caches
	79	ldmfd sp!, {pc}
	80
	81	/*
	82	* cpu_arm1026_reset(loc)
	83	*
	84	* Perform a soft reset of the system. Put the CPU into the
	85	* same state as it would be if it had been reset, and branch
	86	* to what would be the reset vector.
	87	*
	88	* loc: location to jump to for soft reset
	89	*/
	90	.align 5
	91	ENTRY(cpu_arm1026_reset)
92	mov ip, #0
93	mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches
94	mcr p15, 0, ip, c7, c10, 4 @ drain WB
d090ddda	95	#ifdef CONFIG_MMU
1da177e4	96	mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
d090ddda	97	#endif
1da177e4 LT	98	mrc p15, 0, ip, c1, c0, 0 @ ctrl register
	99	bic ip, ip, #0x000f @ ............wcam
	100	bic ip, ip, #0x1100 @ ...i...s........
	101	mcr p15, 0, ip, c1, c0, 0 @ ctrl register
	102	mov pc, r0
	103
	104	/*
	105	* cpu_arm1026_do_idle()
	106	*/
	107	.align 5
	108	ENTRY(cpu_arm1026_do_idle)
	109	mcr p15, 0, r0, c7, c0, 4 @ Wait for interrupt
	110	mov pc, lr
	111
	112	/* ================================= CACHE ================================ */
	113
	114	.align 5
	115	/*
	116	* flush_user_cache_all()
	117	*
	118	* Invalidate all cache entries in a particular address
	119	* space.
	120	*/
	121	ENTRY(arm1026_flush_user_cache_all)
	122	/* FALLTHROUGH */
	123	/*
	124	* flush_kern_cache_all()
	125	*
	126	* Clean and invalidate the entire cache.
	127	*/
	128	ENTRY(arm1026_flush_kern_cache_all)
	129	mov r2, #VM_EXEC
	130	mov ip, #0
	131	__flush_whole_cache:
	132	#ifndef CONFIG_CPU_DCACHE_DISABLE
	133	1: mrc p15, 0, r15, c7, c14, 3 @ test, clean, invalidate
	134	bne 1b
	135	#endif
	136	tst r2, #VM_EXEC
	137	#ifndef CONFIG_CPU_ICACHE_DISABLE
	138	mcrne p15, 0, ip, c7, c5, 0 @ invalidate I cache
	139	#endif
	140	mcrne p15, 0, ip, c7, c10, 4 @ drain WB
	141	mov pc, lr
	142
	143	/*
	144	* flush_user_cache_range(start, end, flags)
	145	*
	146	* Invalidate a range of cache entries in the specified
	147	* address space.
	148	*
	149	* - start - start address (inclusive)
	150	* - end - end address (exclusive)
	151	* - flags - vm_flags for this space
	152	*/
	153	ENTRY(arm1026_flush_user_cache_range)
	154	mov ip, #0
	155	sub r3, r1, r0 @ calculate total size
	156	cmp r3, #CACHE_DLIMIT
	157	bhs __flush_whole_cache
	158
	159	#ifndef CONFIG_CPU_DCACHE_DISABLE
	160	1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
	161	add r0, r0, #CACHE_DLINESIZE
162	cmp r0, r1
163	blo 1b
164	#endif
165	tst r2, #VM_EXEC
166	#ifndef CONFIG_CPU_ICACHE_DISABLE
167	mcrne p15, 0, ip, c7, c5, 0 @ invalidate I cache
168	#endif
169	mcrne p15, 0, ip, c7, c10, 4 @ drain WB
170	mov pc, lr
171
172	/*
173	* coherent_kern_range(start, end)
174	*
175	* Ensure coherency between the Icache and the Dcache in the
176	* region described by start. If you have non-snooping
177	* Harvard caches, you need to implement this function.
178	*
179	* - start - virtual start address
180	* - end - virtual end address
181	*/
182	ENTRY(arm1026_coherent_kern_range)
183	/* FALLTHROUGH */
184	/*
185	* coherent_user_range(start, end)
186	*
187	* Ensure coherency between the Icache and the Dcache in the
188	* region described by start. If you have non-snooping
189	* Harvard caches, you need to implement this function.
190	*
191	* - start - virtual start address
192	* - end - virtual end address
193	*/
194	ENTRY(arm1026_coherent_user_range)
195	mov ip, #0
196	bic r0, r0, #CACHE_DLINESIZE - 1
197	1:
198	#ifndef CONFIG_CPU_DCACHE_DISABLE
199	mcr p15, 0, r0, c7, c10, 1 @ clean D entry
200	#endif
201	#ifndef CONFIG_CPU_ICACHE_DISABLE
202	mcr p15, 0, r0, c7, c5, 1 @ invalidate I entry
203	#endif
204	add r0, r0, #CACHE_DLINESIZE
205	cmp r0, r1
206	blo 1b
207	mcr p15, 0, ip, c7, c10, 4 @ drain WB
208	mov pc, lr
209
210	/*
2c9b9c84	211	* flush_kern_dcache_area(void *addr, size_t size)
1da177e4 LT	212	*
	213	* Ensure no D cache aliasing occurs, either with itself or
	214	* the I cache
	215	*
2c9b9c84 RK	216	* - addr - kernel address
2c9b9c84 RK	217	* - size - region size
1da177e4	218	*/
2c9b9c84	219	ENTRY(arm1026_flush_kern_dcache_area)
1da177e4 LT	220	mov ip, #0
1da177e4 LT	221	#ifndef CONFIG_CPU_DCACHE_DISABLE
2c9b9c84	222	add r1, r0, r1
1da177e4 LT	223	1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
	224	add r0, r0, #CACHE_DLINESIZE
	225	cmp r0, r1
	226	blo 1b
	227	#endif
	228	mcr p15, 0, ip, c7, c10, 4 @ drain WB
	229	mov pc, lr
	230
	231	/*
	232	* dma_inv_range(start, end)
	233	*
	234	* Invalidate (discard) the specified virtual address range.
	235	* May not write back any entries. If 'start' or 'end'
	236	* are not cache line aligned, those lines must be written
	237	* back.
	238	*
	239	* - start - virtual start address
	240	* - end - virtual end address
	241	*
	242	* (same as v4wb)
	243	*/
	244	ENTRY(arm1026_dma_inv_range)
	245	mov ip, #0
	246	#ifndef CONFIG_CPU_DCACHE_DISABLE
	247	tst r0, #CACHE_DLINESIZE - 1
	248	bic r0, r0, #CACHE_DLINESIZE - 1
	249	mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
	250	tst r1, #CACHE_DLINESIZE - 1
	251	mcrne p15, 0, r1, c7, c10, 1 @ clean D entry
	252	1: mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
	253	add r0, r0, #CACHE_DLINESIZE
	254	cmp r0, r1
	255	blo 1b
	256	#endif
	257	mcr p15, 0, ip, c7, c10, 4 @ drain WB
	258	mov pc, lr
	259
	260	/*
	261	* dma_clean_range(start, end)
	262	*
	263	* Clean the specified virtual address range.
	264	*
	265	* - start - virtual start address
	266	* - end - virtual end address
	267	*
	268	* (same as v4wb)
	269	*/
	270	ENTRY(arm1026_dma_clean_range)
	271	mov ip, #0
	272	#ifndef CONFIG_CPU_DCACHE_DISABLE
	273	bic r0, r0, #CACHE_DLINESIZE - 1
	274	1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
	275	add r0, r0, #CACHE_DLINESIZE
	276	cmp r0, r1
	277	blo 1b
	278	#endif
	279	mcr p15, 0, ip, c7, c10, 4 @ drain WB
	280	mov pc, lr
	281
	282	/*
	283	* dma_flush_range(start, end)
	284	*
	285	* Clean and invalidate the specified virtual address range.
	286	*
287	* - start - virtual start address
288	* - end - virtual end address
289	*/
290	ENTRY(arm1026_dma_flush_range)
291	mov ip, #0
292	#ifndef CONFIG_CPU_DCACHE_DISABLE
293	bic r0, r0, #CACHE_DLINESIZE - 1
294	1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
295	add r0, r0, #CACHE_DLINESIZE
296	cmp r0, r1
297	blo 1b
298	#endif
299	mcr p15, 0, ip, c7, c10, 4 @ drain WB
300	mov pc, lr
301
a9c9147e RK	302	/*
	303	* dma_map_area(start, size, dir)
	304	* - start - kernel virtual start address
	305	* - size - size of region
	306	* - dir - DMA direction
	307	*/
	308	ENTRY(arm1026_dma_map_area)
	309	add r1, r1, r0
	310	cmp r2, #DMA_TO_DEVICE
	311	beq arm1026_dma_clean_range
	312	bcs arm1026_dma_inv_range
	313	b arm1026_dma_flush_range
	314	ENDPROC(arm1026_dma_map_area)
	315
	316	/*
	317	* dma_unmap_area(start, size, dir)
	318	* - start - kernel virtual start address
	319	* - size - size of region
	320	* - dir - DMA direction
	321	*/
	322	ENTRY(arm1026_dma_unmap_area)
	323	mov pc, lr
	324	ENDPROC(arm1026_dma_unmap_area)
	325
1da177e4 LT	326	ENTRY(arm1026_cache_fns)
	327	.long arm1026_flush_kern_cache_all
	328	.long arm1026_flush_user_cache_all
	329	.long arm1026_flush_user_cache_range
	330	.long arm1026_coherent_kern_range
	331	.long arm1026_coherent_user_range
2c9b9c84	332	.long arm1026_flush_kern_dcache_area
a9c9147e RK	333	.long arm1026_dma_map_area
a9c9147e RK	334	.long arm1026_dma_unmap_area
1da177e4 LT	335	.long arm1026_dma_inv_range
	336	.long arm1026_dma_clean_range
	337	.long arm1026_dma_flush_range
	338
	339	.align 5
	340	ENTRY(cpu_arm1026_dcache_clean_area)
	341	#ifndef CONFIG_CPU_DCACHE_DISABLE
	342	mov ip, #0
	343	1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
	344	add r0, r0, #CACHE_DLINESIZE
	345	subs r1, r1, #CACHE_DLINESIZE
	346	bhi 1b
	347	#endif
	348	mov pc, lr
	349
	350	/* =============================== PageTable ============================== */
	351
	352	/*
	353	* cpu_arm1026_switch_mm(pgd)
	354	*
	355	* Set the translation base pointer to be as described by pgd.
	356	*
	357	* pgd: new page tables
	358	*/
	359	.align 5
	360	ENTRY(cpu_arm1026_switch_mm)
d090ddda	361	#ifdef CONFIG_MMU
1da177e4 LT	362	mov r1, #0
	363	#ifndef CONFIG_CPU_DCACHE_DISABLE
	364	1: mrc p15, 0, r15, c7, c14, 3 @ test, clean, invalidate
	365	bne 1b
	366	#endif
	367	#ifndef CONFIG_CPU_ICACHE_DISABLE
	368	mcr p15, 0, r1, c7, c5, 0 @ invalidate I cache
	369	#endif
	370	mcr p15, 0, r1, c7, c10, 4 @ drain WB
	371	mcr p15, 0, r0, c2, c0, 0 @ load page table pointer
	372	mcr p15, 0, r1, c8, c7, 0 @ invalidate I & D TLBs
d090ddda	373	#endif
1da177e4 LT	374	mov pc, lr
	375
	376	/*
ad1ae2fe	377	* cpu_arm1026_set_pte_ext(ptep, pte, ext)
1da177e4 LT	378	*
	379	* Set a PTE and flush it out
	380	*/
	381	.align 5
ad1ae2fe	382	ENTRY(cpu_arm1026_set_pte_ext)
d090ddda	383	#ifdef CONFIG_MMU
da091653	384	armv3_set_pte_ext
1da177e4 LT	385	mov r0, r0
	386	#ifndef CONFIG_CPU_DCACHE_DISABLE
	387	mcr p15, 0, r0, c7, c10, 1 @ clean D entry
	388	#endif
d090ddda	389	#endif /* CONFIG_MMU */
1da177e4 LT	390	mov pc, lr
	391
	392
	393	__INIT
	394
	395	.type __arm1026_setup, #function
	396	__arm1026_setup:
	397	mov r0, #0
	398	mcr p15, 0, r0, c7, c7 @ invalidate I,D caches on v4
	399	mcr p15, 0, r0, c7, c10, 4 @ drain write buffer on v4
d090ddda	400	#ifdef CONFIG_MMU
1da177e4 LT	401	mcr p15, 0, r0, c8, c7 @ invalidate I,D TLBs on v4
1da177e4 LT	402	mcr p15, 0, r4, c2, c0 @ load page table pointer
d090ddda	403	#endif
1da177e4 LT	404	#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
	405	mov r0, #4 @ explicitly disable writeback
	406	mcr p15, 7, r0, c15, c0, 0
	407	#endif
22b19086 RK	408	adr r5, arm1026_crval
22b19086 RK	409	ldmia r5, {r5, r6}
1da177e4	410	mrc p15, 0, r0, c1, c0 @ get control register v4
1da177e4	411	bic r0, r0, r5
22b19086	412	orr r0, r0, r6
1da177e4 LT	413	#ifdef CONFIG_CPU_CACHE_ROUND_ROBIN
	414	orr r0, r0, #0x4000 @ .R.. .... .... ....
	415	#endif
	416	mov pc, lr
	417	.size __arm1026_setup, . - __arm1026_setup
	418
	419	/*
	420	* R
	421	* .RVI ZFRS BLDP WCAM
	422	* .011 1001 ..11 0101
	423	*
	424	*/
22b19086 RK	425	.type arm1026_crval, #object
	426	arm1026_crval:
	427	crval clear=0x00007f3f, mmuset=0x00003935, ucset=0x00001934
1da177e4 LT	428
	429	__INITDATA
	430
	431	/*
	432	* Purpose : Function pointers used to access above functions - all calls
	433	* come through these
	434	*/
	435	.type arm1026_processor_functions, #object
	436	arm1026_processor_functions:
	437	.word v5t_early_abort
4fb28474	438	.word legacy_pabort
1da177e4 LT	439	.word cpu_arm1026_proc_init
	440	.word cpu_arm1026_proc_fin
	441	.word cpu_arm1026_reset
	442	.word cpu_arm1026_do_idle
	443	.word cpu_arm1026_dcache_clean_area
	444	.word cpu_arm1026_switch_mm
ad1ae2fe	445	.word cpu_arm1026_set_pte_ext
1da177e4 LT	446	.size arm1026_processor_functions, . - arm1026_processor_functions
	447
	448	.section .rodata
	449
	450	.type cpu_arch_name, #object
	451	cpu_arch_name:
	452	.asciz "armv5tej"
	453	.size cpu_arch_name, . - cpu_arch_name
	454
	455	.type cpu_elf_name, #object
	456	cpu_elf_name:
	457	.asciz "v5"
	458	.size cpu_elf_name, . - cpu_elf_name
	459	.align
	460
	461	.type cpu_arm1026_name, #object
	462	cpu_arm1026_name:
264edb35	463	.asciz "ARM1026EJ-S"
1da177e4 LT	464	.size cpu_arm1026_name, . - cpu_arm1026_name
	465
	466	.align
	467
02b7dd12	468	.section ".proc.info.init", #alloc, #execinstr
1da177e4 LT	469
	470	.type __arm1026_proc_info,#object
	471	__arm1026_proc_info:
	472	.long 0x4106a260 @ ARM 1026EJ-S (v5TEJ)
	473	.long 0xff0ffff0
8799ee9f RK	474	.long PMD_TYPE_SECT \| \
	475	PMD_BIT4 \| \
	476	PMD_SECT_AP_WRITE \| \
	477	PMD_SECT_AP_READ
1da177e4 LT	478	.long PMD_TYPE_SECT \| \
	479	PMD_BIT4 \| \
	480	PMD_SECT_AP_WRITE \| \
	481	PMD_SECT_AP_READ
	482	b __arm1026_setup
	483	.long cpu_arch_name
	484	.long cpu_elf_name
	485	.long HWCAP_SWP\|HWCAP_HALF\|HWCAP_THUMB\|HWCAP_FAST_MULT\|HWCAP_EDSP\|HWCAP_JAVA
	486	.long cpu_arm1026_name
	487	.long arm1026_processor_functions
	488	.long v4wbi_tlb_fns
	489	.long v4wb_user_fns
	490	.long arm1026_cache_fns
	491	.size __arm1026_proc_info, . - __arm1026_proc_info