[mirror_ubuntu-bionic-kernel.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 maintenance 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)
	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
	mov	pc, lr

/*
 * 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
	.pushsection	.idmap.text, "ax"
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
ENDPROC(cpu_arm1026_reset)
	.popsection

/*
 * 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_icache_all()
 *
 *	Unconditionally clean and invalidate the entire icache.
 */
ENTRY(arm1026_flush_icache_all)
#ifndef CONFIG_CPU_ICACHE_DISABLE
	mov	r0, #0
	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
#endif
	mov	pc, lr
ENDPROC(arm1026_flush_icache_all)

/*
 *	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)
 */
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)
 */
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)

	@ define struct cpu_cache_fns (see <asm/cacheflush.h> and proc-macros.S)
	define_cache_functions arm1026

	.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


	__CPUINIT

	.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
	@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
	define_processor_functions arm1026, dabort=v5t_early_abort, pabort=legacy_pabort

	.section .rodata

	string	cpu_arch_name, "armv5tej"
	string	cpu_elf_name, "v5"
	.align
	string	cpu_arm1026_name, "ARM1026EJ-S"
	.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
25985edc	56	* cache line maintenance instructions.
1da177e4 LT	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)
1da177e4 LT	71	mrc p15, 0, r0, c1, c0, 0 @ ctrl register
	72	bic r0, r0, #0x1000 @ ...i............
	73	bic r0, r0, #0x000e @ ............wca.
	74	mcr p15, 0, r0, c1, c0, 0 @ disable caches
9ca03a21	75	mov pc, lr
1da177e4 LT	76
	77	/*
	78	* cpu_arm1026_reset(loc)
	79	*
	80	* Perform a soft reset of the system. Put the CPU into the
	81	* same state as it would be if it had been reset, and branch
	82	* to what would be the reset vector.
	83	*
	84	* loc: location to jump to for soft reset
	85	*/
	86	.align 5
1a4baafa	87	.pushsection .idmap.text, "ax"
1da177e4 LT	88	ENTRY(cpu_arm1026_reset)
	89	mov ip, #0
	90	mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches
	91	mcr p15, 0, ip, c7, c10, 4 @ drain WB
d090ddda	92	#ifdef CONFIG_MMU
1da177e4	93	mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
d090ddda	94	#endif
1da177e4 LT	95	mrc p15, 0, ip, c1, c0, 0 @ ctrl register
	96	bic ip, ip, #0x000f @ ............wcam
	97	bic ip, ip, #0x1100 @ ...i...s........
	98	mcr p15, 0, ip, c1, c0, 0 @ ctrl register
	99	mov pc, r0
1a4baafa WD	100	ENDPROC(cpu_arm1026_reset)
1a4baafa WD	101	.popsection
1da177e4 LT	102
	103	/*
	104	* cpu_arm1026_do_idle()
	105	*/
	106	.align 5
	107	ENTRY(cpu_arm1026_do_idle)
	108	mcr p15, 0, r0, c7, c0, 4 @ Wait for interrupt
	109	mov pc, lr
	110
	111	/* ================================= CACHE ================================ */
	112
	113	.align 5
c8c90860 MW	114
	115	/*
	116	* flush_icache_all()
	117	*
	118	* Unconditionally clean and invalidate the entire icache.
	119	*/
	120	ENTRY(arm1026_flush_icache_all)
	121	#ifndef CONFIG_CPU_ICACHE_DISABLE
	122	mov r0, #0
	123	mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
	124	#endif
	125	mov pc, lr
	126	ENDPROC(arm1026_flush_icache_all)
	127
1da177e4 LT	128	/*
	129	* flush_user_cache_all()
	130	*
	131	* Invalidate all cache entries in a particular address
	132	* space.
	133	*/
	134	ENTRY(arm1026_flush_user_cache_all)
	135	/* FALLTHROUGH */
	136	/*
	137	* flush_kern_cache_all()
	138	*
	139	* Clean and invalidate the entire cache.
	140	*/
	141	ENTRY(arm1026_flush_kern_cache_all)
	142	mov r2, #VM_EXEC
	143	mov ip, #0
	144	__flush_whole_cache:
	145	#ifndef CONFIG_CPU_DCACHE_DISABLE
	146	1: mrc p15, 0, r15, c7, c14, 3 @ test, clean, invalidate
	147	bne 1b
	148	#endif
	149	tst r2, #VM_EXEC
	150	#ifndef CONFIG_CPU_ICACHE_DISABLE
	151	mcrne p15, 0, ip, c7, c5, 0 @ invalidate I cache
	152	#endif
	153	mcrne p15, 0, ip, c7, c10, 4 @ drain WB
	154	mov pc, lr
	155
	156	/*
	157	* flush_user_cache_range(start, end, flags)
	158	*
	159	* Invalidate a range of cache entries in the specified
	160	* address space.
	161	*
	162	* - start - start address (inclusive)
	163	* - end - end address (exclusive)
	164	* - flags - vm_flags for this space
	165	*/
	166	ENTRY(arm1026_flush_user_cache_range)
	167	mov ip, #0
	168	sub r3, r1, r0 @ calculate total size
	169	cmp r3, #CACHE_DLIMIT
	170	bhs __flush_whole_cache
	171
	172	#ifndef CONFIG_CPU_DCACHE_DISABLE
	173	1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
	174	add r0, r0, #CACHE_DLINESIZE
	175	cmp r0, r1
	176	blo 1b
	177	#endif
	178	tst r2, #VM_EXEC
	179	#ifndef CONFIG_CPU_ICACHE_DISABLE
	180	mcrne p15, 0, ip, c7, c5, 0 @ invalidate I cache
	181	#endif
	182	mcrne p15, 0, ip, c7, c10, 4 @ drain WB
	183	mov pc, lr
	184
	185	/*
	186	* coherent_kern_range(start, end)
	187	*
	188	* Ensure coherency between the Icache and the Dcache in the
	189	* region described by start. If you have non-snooping
	190	* Harvard caches, you need to implement this function.
	191	*
192	* - start - virtual start address
193	* - end - virtual end address
194	*/
195	ENTRY(arm1026_coherent_kern_range)
196	/* FALLTHROUGH */
197	/*
198	* coherent_user_range(start, end)
199	*
200	* Ensure coherency between the Icache and the Dcache in the
201	* region described by start. If you have non-snooping
202	* Harvard caches, you need to implement this function.
203	*
204	* - start - virtual start address
205	* - end - virtual end address
206	*/
207	ENTRY(arm1026_coherent_user_range)
208	mov ip, #0
209	bic r0, r0, #CACHE_DLINESIZE - 1
210	1:
211	#ifndef CONFIG_CPU_DCACHE_DISABLE
212	mcr p15, 0, r0, c7, c10, 1 @ clean D entry
213	#endif
214	#ifndef CONFIG_CPU_ICACHE_DISABLE
215	mcr p15, 0, r0, c7, c5, 1 @ invalidate I entry
216	#endif
217	add r0, r0, #CACHE_DLINESIZE
218	cmp r0, r1
219	blo 1b
220	mcr p15, 0, ip, c7, c10, 4 @ drain WB
221	mov pc, lr
222
223	/*
2c9b9c84	224	* flush_kern_dcache_area(void *addr, size_t size)
1da177e4 LT	225	*
	226	* Ensure no D cache aliasing occurs, either with itself or
	227	* the I cache
	228	*
2c9b9c84 RK	229	* - addr - kernel address
2c9b9c84 RK	230	* - size - region size
1da177e4	231	*/
2c9b9c84	232	ENTRY(arm1026_flush_kern_dcache_area)
1da177e4 LT	233	mov ip, #0
1da177e4 LT	234	#ifndef CONFIG_CPU_DCACHE_DISABLE
2c9b9c84	235	add r1, r0, r1
1da177e4 LT	236	1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
	237	add r0, r0, #CACHE_DLINESIZE
	238	cmp r0, r1
	239	blo 1b
	240	#endif
	241	mcr p15, 0, ip, c7, c10, 4 @ drain WB
	242	mov pc, lr
	243
	244	/*
	245	* dma_inv_range(start, end)
	246	*
	247	* Invalidate (discard) the specified virtual address range.
	248	* May not write back any entries. If 'start' or 'end'
	249	* are not cache line aligned, those lines must be written
	250	* back.
	251	*
	252	* - start - virtual start address
	253	* - end - virtual end address
	254	*
	255	* (same as v4wb)
	256	*/
702b94bf	257	arm1026_dma_inv_range:
1da177e4 LT	258	mov ip, #0
	259	#ifndef CONFIG_CPU_DCACHE_DISABLE
	260	tst r0, #CACHE_DLINESIZE - 1
	261	bic r0, r0, #CACHE_DLINESIZE - 1
	262	mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
	263	tst r1, #CACHE_DLINESIZE - 1
	264	mcrne p15, 0, r1, c7, c10, 1 @ clean D entry
	265	1: mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
	266	add r0, r0, #CACHE_DLINESIZE
	267	cmp r0, r1
	268	blo 1b
	269	#endif
	270	mcr p15, 0, ip, c7, c10, 4 @ drain WB
	271	mov pc, lr
	272
	273	/*
	274	* dma_clean_range(start, end)
	275	*
	276	* Clean the specified virtual address range.
	277	*
	278	* - start - virtual start address
	279	* - end - virtual end address
	280	*
	281	* (same as v4wb)
	282	*/
702b94bf	283	arm1026_dma_clean_range:
1da177e4 LT	284	mov ip, #0
	285	#ifndef CONFIG_CPU_DCACHE_DISABLE
	286	bic r0, r0, #CACHE_DLINESIZE - 1
	287	1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
	288	add r0, r0, #CACHE_DLINESIZE
	289	cmp r0, r1
	290	blo 1b
	291	#endif
	292	mcr p15, 0, ip, c7, c10, 4 @ drain WB
	293	mov pc, lr
	294
	295	/*
	296	* dma_flush_range(start, end)
	297	*
	298	* Clean and invalidate the specified virtual address range.
	299	*
	300	* - start - virtual start address
	301	* - end - virtual end address
	302	*/
	303	ENTRY(arm1026_dma_flush_range)
	304	mov ip, #0
	305	#ifndef CONFIG_CPU_DCACHE_DISABLE
	306	bic r0, r0, #CACHE_DLINESIZE - 1
	307	1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
	308	add r0, r0, #CACHE_DLINESIZE
	309	cmp r0, r1
	310	blo 1b
	311	#endif
	312	mcr p15, 0, ip, c7, c10, 4 @ drain WB
	313	mov pc, lr
	314
a9c9147e RK	315	/*
	316	* dma_map_area(start, size, dir)
	317	* - start - kernel virtual start address
	318	* - size - size of region
	319	* - dir - DMA direction
	320	*/
	321	ENTRY(arm1026_dma_map_area)
	322	add r1, r1, r0
	323	cmp r2, #DMA_TO_DEVICE
	324	beq arm1026_dma_clean_range
	325	bcs arm1026_dma_inv_range
	326	b arm1026_dma_flush_range
	327	ENDPROC(arm1026_dma_map_area)
	328
	329	/*
	330	* dma_unmap_area(start, size, dir)
	331	* - start - kernel virtual start address
	332	* - size - size of region
	333	* - dir - DMA direction
	334	*/
	335	ENTRY(arm1026_dma_unmap_area)
	336	mov pc, lr
	337	ENDPROC(arm1026_dma_unmap_area)
	338
5c9369bc DM	339	@ define struct cpu_cache_fns (see <asm/cacheflush.h> and proc-macros.S)
5c9369bc DM	340	define_cache_functions arm1026
1da177e4 LT	341
	342	.align 5
	343	ENTRY(cpu_arm1026_dcache_clean_area)
	344	#ifndef CONFIG_CPU_DCACHE_DISABLE
	345	mov ip, #0
	346	1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
	347	add r0, r0, #CACHE_DLINESIZE
	348	subs r1, r1, #CACHE_DLINESIZE
	349	bhi 1b
	350	#endif
	351	mov pc, lr
	352
	353	/* =============================== PageTable ============================== */
	354
	355	/*
	356	* cpu_arm1026_switch_mm(pgd)
	357	*
	358	* Set the translation base pointer to be as described by pgd.
	359	*
	360	* pgd: new page tables
	361	*/
	362	.align 5
	363	ENTRY(cpu_arm1026_switch_mm)
d090ddda	364	#ifdef CONFIG_MMU
1da177e4 LT	365	mov r1, #0
	366	#ifndef CONFIG_CPU_DCACHE_DISABLE
	367	1: mrc p15, 0, r15, c7, c14, 3 @ test, clean, invalidate
	368	bne 1b
	369	#endif
	370	#ifndef CONFIG_CPU_ICACHE_DISABLE
	371	mcr p15, 0, r1, c7, c5, 0 @ invalidate I cache
	372	#endif
	373	mcr p15, 0, r1, c7, c10, 4 @ drain WB
	374	mcr p15, 0, r0, c2, c0, 0 @ load page table pointer
	375	mcr p15, 0, r1, c8, c7, 0 @ invalidate I & D TLBs
d090ddda	376	#endif
1da177e4 LT	377	mov pc, lr
	378
	379	/*
ad1ae2fe	380	* cpu_arm1026_set_pte_ext(ptep, pte, ext)
1da177e4 LT	381	*
	382	* Set a PTE and flush it out
	383	*/
	384	.align 5
ad1ae2fe	385	ENTRY(cpu_arm1026_set_pte_ext)
d090ddda	386	#ifdef CONFIG_MMU
da091653	387	armv3_set_pte_ext
1da177e4 LT	388	mov r0, r0
	389	#ifndef CONFIG_CPU_DCACHE_DISABLE
	390	mcr p15, 0, r0, c7, c10, 1 @ clean D entry
	391	#endif
d090ddda	392	#endif /* CONFIG_MMU */
1da177e4 LT	393	mov pc, lr
	394
	395
5085f3ff	396	__CPUINIT
1da177e4 LT	397
	398	.type __arm1026_setup, #function
	399	__arm1026_setup:
	400	mov r0, #0
	401	mcr p15, 0, r0, c7, c7 @ invalidate I,D caches on v4
	402	mcr p15, 0, r0, c7, c10, 4 @ drain write buffer on v4
d090ddda	403	#ifdef CONFIG_MMU
1da177e4 LT	404	mcr p15, 0, r0, c8, c7 @ invalidate I,D TLBs on v4
1da177e4 LT	405	mcr p15, 0, r4, c2, c0 @ load page table pointer
d090ddda	406	#endif
1da177e4 LT	407	#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
	408	mov r0, #4 @ explicitly disable writeback
	409	mcr p15, 7, r0, c15, c0, 0
	410	#endif
22b19086 RK	411	adr r5, arm1026_crval
22b19086 RK	412	ldmia r5, {r5, r6}
1da177e4	413	mrc p15, 0, r0, c1, c0 @ get control register v4
1da177e4	414	bic r0, r0, r5
22b19086	415	orr r0, r0, r6
1da177e4 LT	416	#ifdef CONFIG_CPU_CACHE_ROUND_ROBIN
	417	orr r0, r0, #0x4000 @ .R.. .... .... ....
	418	#endif
	419	mov pc, lr
	420	.size __arm1026_setup, . - __arm1026_setup
	421
	422	/*
	423	* R
	424	* .RVI ZFRS BLDP WCAM
	425	* .011 1001 ..11 0101
	426	*
	427	*/
22b19086 RK	428	.type arm1026_crval, #object
	429	arm1026_crval:
	430	crval clear=0x00007f3f, mmuset=0x00003935, ucset=0x00001934
1da177e4 LT	431
1da177e4 LT	432	__INITDATA
5c9369bc DM	433	@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
5c9369bc DM	434	define_processor_functions arm1026, dabort=v5t_early_abort, pabort=legacy_pabort
1da177e4 LT	435
	436	.section .rodata
	437
5c9369bc DM	438	string cpu_arch_name, "armv5tej"
5c9369bc DM	439	string cpu_elf_name, "v5"
1da177e4	440	.align
5c9369bc	441	string cpu_arm1026_name, "ARM1026EJ-S"
1da177e4 LT	442	.align
1da177e4 LT	443
02b7dd12	444	.section ".proc.info.init", #alloc, #execinstr
1da177e4 LT	445
	446	.type __arm1026_proc_info,#object
	447	__arm1026_proc_info:
	448	.long 0x4106a260 @ ARM 1026EJ-S (v5TEJ)
	449	.long 0xff0ffff0
8799ee9f RK	450	.long PMD_TYPE_SECT \| \
	451	PMD_BIT4 \| \
	452	PMD_SECT_AP_WRITE \| \
	453	PMD_SECT_AP_READ
1da177e4 LT	454	.long PMD_TYPE_SECT \| \
	455	PMD_BIT4 \| \
	456	PMD_SECT_AP_WRITE \| \
	457	PMD_SECT_AP_READ
	458	b __arm1026_setup
	459	.long cpu_arch_name
	460	.long cpu_elf_name
	461	.long HWCAP_SWP\|HWCAP_HALF\|HWCAP_THUMB\|HWCAP_FAST_MULT\|HWCAP_EDSP\|HWCAP_JAVA
	462	.long cpu_arm1026_name
	463	.long arm1026_processor_functions
	464	.long v4wbi_tlb_fns
	465	.long v4wb_user_fns
	466	.long arm1026_cache_fns
	467	.size __arm1026_proc_info, . - __arm1026_proc_info