[linux.git] / arch / arm / mm / proc-arm1020e.S

/*
 *  linux/arch/arm/mm/proc-arm1020e.S: MMU functions for ARM1020
 *
 *  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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *
 * These are the low level assembler for performing cache and TLB
 * functions on the arm1020e.
 *
 *  CONFIG_CPU_ARM1020_CPU_IDLE -> nohlt
 */
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#include <asm/procinfo.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_arm1020e_proc_init()
 */
ENTRY(cpu_arm1020e_proc_init)
	mov	pc, lr

/*
 * cpu_arm1020e_proc_fin()
 */
ENTRY(cpu_arm1020e_proc_fin)
	stmfd	sp!, {lr}
	mov	ip, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
	msr	cpsr_c, ip
	bl	arm1020e_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_arm1020e_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_arm1020e_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_arm1020e_do_idle()
 */
	.align	5
ENTRY(cpu_arm1020e_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(arm1020e_flush_user_cache_all)
	/* FALLTHROUGH */
/*
 *	flush_kern_cache_all()
 *
 *	Clean and invalidate the entire cache.
 */
ENTRY(arm1020e_flush_kern_cache_all)
	mov	r2, #VM_EXEC
	mov	ip, #0
__flush_whole_cache:
#ifndef CONFIG_CPU_DCACHE_DISABLE
	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
	mov	r1, #(CACHE_DSEGMENTS - 1) << 5	@ 16 segments
1:	orr	r3, r1, #(CACHE_DENTRIES - 1) << 26 @ 64 entries
2:	mcr	p15, 0, r3, c7, c14, 2		@ clean+invalidate D index
	subs	r3, r3, #1 << 26
	bcs	2b				@ entries 63 to 0
	subs	r1, r1, #1 << 5
	bcs	1b				@ segments 15 to 0
#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(arm1020e_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(arm1020e_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(arm1020e_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_page(void *page)
 *
 *	Ensure no D cache aliasing occurs, either with itself or
 *	the I cache
 *
 *	- page	- page aligned address
 */
ENTRY(arm1020e_flush_kern_dcache_page)
	mov	ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
	add	r1, r0, #PAGE_SZ
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(arm1020e_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(arm1020e_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(arm1020e_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

ENTRY(arm1020e_cache_fns)
	.long	arm1020e_flush_kern_cache_all
	.long	arm1020e_flush_user_cache_all
	.long	arm1020e_flush_user_cache_range
	.long	arm1020e_coherent_kern_range
	.long	arm1020e_coherent_user_range
	.long	arm1020e_flush_kern_dcache_page
	.long	arm1020e_dma_inv_range
	.long	arm1020e_dma_clean_range
	.long	arm1020e_dma_flush_range

	.align	5
ENTRY(cpu_arm1020e_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_arm1020e_switch_mm(pgd)
 *
 * Set the translation base pointer to be as described by pgd.
 *
 * pgd: new page tables
 */
	.align	5
ENTRY(cpu_arm1020e_switch_mm)
#ifdef CONFIG_MMU
#ifndef CONFIG_CPU_DCACHE_DISABLE
	mcr	p15, 0, r3, c7, c10, 4
	mov	r1, #0xF			@ 16 segments
1:	mov	r3, #0x3F			@ 64 entries
2:	mov	ip, r3, LSL #26 		@ shift up entry
	orr	ip, ip, r1, LSL #5		@ shift in/up index
	mcr	p15, 0, ip, c7, c14, 2		@ Clean & Inval DCache entry
	mov	ip, #0
	subs	r3, r3, #1
	cmp	r3, #0
	bge	2b				@ entries 3F to 0
	subs	r1, r1, #1
	cmp	r1, #0
	bge	1b				@ segments 15 to 0

#endif
	mov	r1, #0
#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_arm1020e_set_pte(ptep, pte)
 *
 * Set a PTE and flush it out
 */
	.align	5
ENTRY(cpu_arm1020e_set_pte)
#ifdef CONFIG_MMU
	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

#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
	eor	r3, r1, #0x0a			@ C & small page?
	tst	r3, #0x0b
	biceq	r2, r2, #4
#endif
	str	r2, [r0]			@ hardware version
	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	__arm1020e_setup, #function
__arm1020e_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
#endif
	adr	r5, arm1020e_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	__arm1020e_setup, . - __arm1020e_setup

	/*
	 *  R
	 * .RVI ZFRS BLDP WCAM
	 * .011 1001 ..11 0101
	 */
	.type	arm1020e_crval, #object
arm1020e_crval:
	crval	clear=0x00007f3f, mmuset=0x00003935, ucset=0x00001930

	__INITDATA

/*
 * Purpose : Function pointers used to access above functions - all calls
 *	     come through these
 */
	.type	arm1020e_processor_functions, #object
arm1020e_processor_functions:
	.word	v4t_early_abort
	.word	cpu_arm1020e_proc_init
	.word	cpu_arm1020e_proc_fin
	.word	cpu_arm1020e_reset
	.word	cpu_arm1020e_do_idle
	.word	cpu_arm1020e_dcache_clean_area
	.word	cpu_arm1020e_switch_mm
	.word	cpu_arm1020e_set_pte
	.size	arm1020e_processor_functions, . - arm1020e_processor_functions

	.section ".rodata"

	.type	cpu_arch_name, #object
cpu_arch_name:
	.asciz	"armv5te"
	.size	cpu_arch_name, . - cpu_arch_name

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

	.type	cpu_arm1020e_name, #object
cpu_arm1020e_name:
	.asciz	"ARM1020E"
	.size	cpu_arm1020e_name, . - cpu_arm1020e_name

	.align

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

	.type	__arm1020e_proc_info,#object
__arm1020e_proc_info:
	.long	0x4105a200			@ ARM 1020TE (Architecture v5TE)
	.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	__arm1020e_setup
	.long	cpu_arch_name
	.long	cpu_elf_name
	.long	HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB | HWCAP_EDSP
	.long	cpu_arm1020e_name
	.long	arm1020e_processor_functions
	.long	v4wbi_tlb_fns
	.long	v4wb_user_fns
	.long	arm1020e_cache_fns
	.size	__arm1020e_proc_info, . - __arm1020e_proc_info
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/arm/mm/proc-arm1020e.S: MMU functions for ARM1020
	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	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	*
	23	* These are the low level assembler for performing cache and TLB
	24	* functions on the arm1020e.
	25	*
	26	* CONFIG_CPU_ARM1020_CPU_IDLE -> nohlt
	27	*/
	28	#include <linux/linkage.h>
1da177e4 LT	29	#include <linux/init.h>
1da177e4 LT	30	#include <asm/assembler.h>
e6ae744d	31	#include <asm/asm-offsets.h>
74945c86	32	#include <asm/pgtable-hwdef.h>
1da177e4 LT	33	#include <asm/pgtable.h>
	34	#include <asm/procinfo.h>
	35	#include <asm/ptrace.h>
1da177e4	36
00eb0f6b RK	37	#include "proc-macros.S"
00eb0f6b RK	38
1da177e4 LT	39	/*
	40	* This is the maximum size of an area which will be invalidated
	41	* using the single invalidate entry instructions. Anything larger
	42	* than this, and we go for the whole cache.
	43	*
	44	* This value should be chosen such that we choose the cheapest
	45	* alternative.
	46	*/
	47	#define MAX_AREA_SIZE 32768
	48
	49	/*
	50	* The size of one data cache line.
	51	*/
	52	#define CACHE_DLINESIZE 32
	53
	54	/*
	55	* The number of data cache segments.
	56	*/
	57	#define CACHE_DSEGMENTS 16
	58
	59	/*
	60	* The number of lines in a cache segment.
	61	*/
	62	#define CACHE_DENTRIES 64
	63
	64	/*
	65	* This is the size at which it becomes more efficient to
	66	* clean the whole cache, rather than using the individual
	67	* cache line maintainence instructions.
	68	*/
	69	#define CACHE_DLIMIT 32768
	70
	71	.text
	72	/*
	73	* cpu_arm1020e_proc_init()
	74	*/
	75	ENTRY(cpu_arm1020e_proc_init)
	76	mov pc, lr
	77
	78	/*
	79	* cpu_arm1020e_proc_fin()
	80	*/
	81	ENTRY(cpu_arm1020e_proc_fin)
	82	stmfd sp!, {lr}
	83	mov ip, #PSR_F_BIT \| PSR_I_BIT \| SVC_MODE
	84	msr cpsr_c, ip
	85	bl arm1020e_flush_kern_cache_all
	86	mrc p15, 0, r0, c1, c0, 0 @ ctrl register
	87	bic r0, r0, #0x1000 @ ...i............
	88	bic r0, r0, #0x000e @ ............wca.
	89	mcr p15, 0, r0, c1, c0, 0 @ disable caches
	90	ldmfd sp!, {pc}
	91
	92	/*
	93	* cpu_arm1020e_reset(loc)
	94	*
	95	* Perform a soft reset of the system. Put the CPU into the
	96	* same state as it would be if it had been reset, and branch
	97	* to what would be the reset vector.
	98	*
	99	* loc: location to jump to for soft reset
	100	*/
	101	.align 5
	102	ENTRY(cpu_arm1020e_reset)
103	mov ip, #0
104	mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches
105	mcr p15, 0, ip, c7, c10, 4 @ drain WB
d090ddda	106	#ifdef CONFIG_MMU
1da177e4	107	mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
d090ddda	108	#endif
1da177e4 LT	109	mrc p15, 0, ip, c1, c0, 0 @ ctrl register
	110	bic ip, ip, #0x000f @ ............wcam
	111	bic ip, ip, #0x1100 @ ...i...s........
	112	mcr p15, 0, ip, c1, c0, 0 @ ctrl register
	113	mov pc, r0
	114
	115	/*
	116	* cpu_arm1020e_do_idle()
	117	*/
	118	.align 5
	119	ENTRY(cpu_arm1020e_do_idle)
	120	mcr p15, 0, r0, c7, c0, 4 @ Wait for interrupt
	121	mov pc, lr
	122
	123	/* ================================= CACHE ================================ */
	124
	125	.align 5
	126	/*
	127	* flush_user_cache_all()
	128	*
	129	* Invalidate all cache entries in a particular address
	130	* space.
	131	*/
	132	ENTRY(arm1020e_flush_user_cache_all)
	133	/* FALLTHROUGH */
	134	/*
	135	* flush_kern_cache_all()
	136	*
	137	* Clean and invalidate the entire cache.
	138	*/
	139	ENTRY(arm1020e_flush_kern_cache_all)
	140	mov r2, #VM_EXEC
	141	mov ip, #0
	142	__flush_whole_cache:
	143	#ifndef CONFIG_CPU_DCACHE_DISABLE
	144	mcr p15, 0, ip, c7, c10, 4 @ drain WB
	145	mov r1, #(CACHE_DSEGMENTS - 1) << 5 @ 16 segments
	146	1: orr r3, r1, #(CACHE_DENTRIES - 1) << 26 @ 64 entries
	147	2: mcr p15, 0, r3, c7, c14, 2 @ clean+invalidate D index
	148	subs r3, r3, #1 << 26
	149	bcs 2b @ entries 63 to 0
	150	subs r1, r1, #1 << 5
	151	bcs 1b @ segments 15 to 0
	152	#endif
	153	tst r2, #VM_EXEC
	154	#ifndef CONFIG_CPU_ICACHE_DISABLE
	155	mcrne p15, 0, ip, c7, c5, 0 @ invalidate I cache
	156	#endif
	157	mcrne p15, 0, ip, c7, c10, 4 @ drain WB
	158	mov pc, lr
	159
	160	/*
	161	* flush_user_cache_range(start, end, flags)
	162	*
	163	* Invalidate a range of cache entries in the specified
	164	* address space.
	165	*
	166	* - start - start address (inclusive)
	167	* - end - end address (exclusive)
	168	* - flags - vm_flags for this space
	169	*/
	170	ENTRY(arm1020e_flush_user_cache_range)
	171	mov ip, #0
	172	sub r3, r1, r0 @ calculate total size
173	cmp r3, #CACHE_DLIMIT
174	bhs __flush_whole_cache
175
176	#ifndef CONFIG_CPU_DCACHE_DISABLE
177	1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
178	add r0, r0, #CACHE_DLINESIZE
179	cmp r0, r1
180	blo 1b
181	#endif
182	tst r2, #VM_EXEC
183	#ifndef CONFIG_CPU_ICACHE_DISABLE
184	mcrne p15, 0, ip, c7, c5, 0 @ invalidate I cache
185	#endif
186	mcrne p15, 0, ip, c7, c10, 4 @ drain WB
187	mov pc, lr
188
189	/*
190	* coherent_kern_range(start, end)
191	*
192	* Ensure coherency between the Icache and the Dcache in the
193	* region described by start. If you have non-snooping
194	* Harvard caches, you need to implement this function.
195	*
196	* - start - virtual start address
197	* - end - virtual end address
198	*/
199	ENTRY(arm1020e_coherent_kern_range)
200	/* FALLTHROUGH */
201	/*
202	* coherent_user_range(start, end)
203	*
204	* Ensure coherency between the Icache and the Dcache in the
205	* region described by start. If you have non-snooping
206	* Harvard caches, you need to implement this function.
207	*
208	* - start - virtual start address
209	* - end - virtual end address
210	*/
211	ENTRY(arm1020e_coherent_user_range)
212	mov ip, #0
213	bic r0, r0, #CACHE_DLINESIZE - 1
214	1:
215	#ifndef CONFIG_CPU_DCACHE_DISABLE
216	mcr p15, 0, r0, c7, c10, 1 @ clean D entry
217	#endif
218	#ifndef CONFIG_CPU_ICACHE_DISABLE
219	mcr p15, 0, r0, c7, c5, 1 @ invalidate I entry
220	#endif
221	add r0, r0, #CACHE_DLINESIZE
222	cmp r0, r1
223	blo 1b
224	mcr p15, 0, ip, c7, c10, 4 @ drain WB
225	mov pc, lr
226
227	/*
228	* flush_kern_dcache_page(void *page)
229	*
230	* Ensure no D cache aliasing occurs, either with itself or
231	* the I cache
232	*
233	* - page - page aligned address
234	*/
235	ENTRY(arm1020e_flush_kern_dcache_page)
236	mov ip, #0
237	#ifndef CONFIG_CPU_DCACHE_DISABLE
238	add r1, r0, #PAGE_SZ
239	1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
240	add r0, r0, #CACHE_DLINESIZE
241	cmp r0, r1
242	blo 1b
243	#endif
244	mcr p15, 0, ip, c7, c10, 4 @ drain WB
245	mov pc, lr
246
247	/*
248	* dma_inv_range(start, end)
249	*
250	* Invalidate (discard) the specified virtual address range.
251	* May not write back any entries. If 'start' or 'end'
252	* are not cache line aligned, those lines must be written
253	* back.
254	*
255	* - start - virtual start address
256	* - end - virtual end address
257	*
258	* (same as v4wb)
259	*/
260	ENTRY(arm1020e_dma_inv_range)
261	mov ip, #0
262	#ifndef CONFIG_CPU_DCACHE_DISABLE
263	tst r0, #CACHE_DLINESIZE - 1
264	bic r0, r0, #CACHE_DLINESIZE - 1
265	mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
266	tst r1, #CACHE_DLINESIZE - 1
267	mcrne p15, 0, r1, c7, c10, 1 @ clean D entry
268	1: mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
269	add r0, r0, #CACHE_DLINESIZE
270	cmp r0, r1
271	blo 1b
272	#endif
273	mcr p15, 0, ip, c7, c10, 4 @ drain WB
274	mov pc, lr
275
276	/*
277	* dma_clean_range(start, end)
278	*
279	* Clean the specified virtual address range.
280	*
281	* - start - virtual start address
282	* - end - virtual end address
283	*
284	* (same as v4wb)
285	*/
286	ENTRY(arm1020e_dma_clean_range)
287	mov ip, #0
288	#ifndef CONFIG_CPU_DCACHE_DISABLE
289	bic r0, r0, #CACHE_DLINESIZE - 1
290	1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
291	add r0, r0, #CACHE_DLINESIZE
292	cmp r0, r1
293	blo 1b
294	#endif
295	mcr p15, 0, ip, c7, c10, 4 @ drain WB
296	mov pc, lr
297
298	/*
299	* dma_flush_range(start, end)
300	*
301	* Clean and invalidate the specified virtual address range.
302	*
303	* - start - virtual start address
304	* - end - virtual end address
305	*/
306	ENTRY(arm1020e_dma_flush_range)
307	mov ip, #0
308	#ifndef CONFIG_CPU_DCACHE_DISABLE
309	bic r0, r0, #CACHE_DLINESIZE - 1
310	1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
311	add r0, r0, #CACHE_DLINESIZE
312	cmp r0, r1
313	blo 1b
314	#endif
315	mcr p15, 0, ip, c7, c10, 4 @ drain WB
316	mov pc, lr
317
318	ENTRY(arm1020e_cache_fns)
319	.long arm1020e_flush_kern_cache_all
320	.long arm1020e_flush_user_cache_all
321	.long arm1020e_flush_user_cache_range
322	.long arm1020e_coherent_kern_range
323	.long arm1020e_coherent_user_range
324	.long arm1020e_flush_kern_dcache_page
325	.long arm1020e_dma_inv_range
326	.long arm1020e_dma_clean_range
327	.long arm1020e_dma_flush_range
328
329	.align 5
330	ENTRY(cpu_arm1020e_dcache_clean_area)
331	#ifndef CONFIG_CPU_DCACHE_DISABLE
332	mov ip, #0
333	1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
334	add r0, r0, #CACHE_DLINESIZE
335	subs r1, r1, #CACHE_DLINESIZE
336	bhi 1b
337	#endif
338	mov pc, lr
339
340	/* =============================== PageTable ============================== */
341
342	/*
343	* cpu_arm1020e_switch_mm(pgd)
344	*
345	* Set the translation base pointer to be as described by pgd.
346	*
347	* pgd: new page tables
348	*/
349	.align 5
350	ENTRY(cpu_arm1020e_switch_mm)
d090ddda	351	#ifdef CONFIG_MMU
1da177e4 LT	352	#ifndef CONFIG_CPU_DCACHE_DISABLE
	353	mcr p15, 0, r3, c7, c10, 4
	354	mov r1, #0xF @ 16 segments
	355	1: mov r3, #0x3F @ 64 entries
	356	2: mov ip, r3, LSL #26 @ shift up entry
	357	orr ip, ip, r1, LSL #5 @ shift in/up index
	358	mcr p15, 0, ip, c7, c14, 2 @ Clean & Inval DCache entry
	359	mov ip, #0
	360	subs r3, r3, #1
	361	cmp r3, #0
	362	bge 2b @ entries 3F to 0
	363	subs r1, r1, #1
	364	cmp r1, #0
	365	bge 1b @ segments 15 to 0
	366
	367	#endif
	368	mov r1, #0
	369	#ifndef CONFIG_CPU_ICACHE_DISABLE
	370	mcr p15, 0, r1, c7, c5, 0 @ invalidate I cache
	371	#endif
	372	mcr p15, 0, r1, c7, c10, 4 @ drain WB
	373	mcr p15, 0, r0, c2, c0, 0 @ load page table pointer
	374	mcr p15, 0, r1, c8, c7, 0 @ invalidate I & D TLBs
d090ddda	375	#endif
1da177e4 LT	376	mov pc, lr
	377
	378	/*
	379	* cpu_arm1020e_set_pte(ptep, pte)
	380	*
	381	* Set a PTE and flush it out
	382	*/
	383	.align 5
	384	ENTRY(cpu_arm1020e_set_pte)
d090ddda	385	#ifdef CONFIG_MMU
1da177e4 LT	386	str r1, [r0], #-2048 @ linux version
	387
	388	eor r1, r1, #L_PTE_PRESENT \| L_PTE_YOUNG \| L_PTE_WRITE \| L_PTE_DIRTY
	389
	390	bic r2, r1, #PTE_SMALL_AP_MASK
	391	bic r2, r2, #PTE_TYPE_MASK
	392	orr r2, r2, #PTE_TYPE_SMALL
	393
	394	tst r1, #L_PTE_USER @ User?
	395	orrne r2, r2, #PTE_SMALL_AP_URO_SRW
	396
	397	tst r1, #L_PTE_WRITE \| L_PTE_DIRTY @ Write and Dirty?
	398	orreq r2, r2, #PTE_SMALL_AP_UNO_SRW
	399
	400	tst r1, #L_PTE_PRESENT \| L_PTE_YOUNG @ Present and Young?
	401	movne r2, #0
	402
	403	#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
	404	eor r3, r1, #0x0a @ C & small page?
	405	tst r3, #0x0b
	406	biceq r2, r2, #4
	407	#endif
	408	str r2, [r0] @ hardware version
	409	mov r0, r0
	410	#ifndef CONFIG_CPU_DCACHE_DISABLE
	411	mcr p15, 0, r0, c7, c10, 1 @ clean D entry
	412	#endif
d090ddda	413	#endif /* CONFIG_MMU */
1da177e4 LT	414	mov pc, lr
	415
	416	__INIT
	417
	418	.type __arm1020e_setup, #function
	419	__arm1020e_setup:
	420	mov r0, #0
	421	mcr p15, 0, r0, c7, c7 @ invalidate I,D caches on v4
	422	mcr p15, 0, r0, c7, c10, 4 @ drain write buffer on v4
d090ddda	423	#ifdef CONFIG_MMU
1da177e4	424	mcr p15, 0, r0, c8, c7 @ invalidate I,D TLBs on v4
d090ddda	425	#endif
22b19086 RK	426	adr r5, arm1020e_crval
22b19086 RK	427	ldmia r5, {r5, r6}
1da177e4	428	mrc p15, 0, r0, c1, c0 @ get control register v4
1da177e4	429	bic r0, r0, r5
22b19086	430	orr r0, r0, r6
1da177e4 LT	431	#ifdef CONFIG_CPU_CACHE_ROUND_ROBIN
	432	orr r0, r0, #0x4000 @ .R.. .... .... ....
	433	#endif
	434	mov pc, lr
	435	.size __arm1020e_setup, . - __arm1020e_setup
	436
	437	/*
	438	* R
	439	* .RVI ZFRS BLDP WCAM
abaf48a0	440	* .011 1001 ..11 0101
1da177e4	441	*/
22b19086 RK	442	.type arm1020e_crval, #object
	443	arm1020e_crval:
	444	crval clear=0x00007f3f, mmuset=0x00003935, ucset=0x00001930
1da177e4 LT	445
	446	__INITDATA
	447
	448	/*
	449	* Purpose : Function pointers used to access above functions - all calls
	450	* come through these
	451	*/
	452	.type arm1020e_processor_functions, #object
	453	arm1020e_processor_functions:
	454	.word v4t_early_abort
	455	.word cpu_arm1020e_proc_init
	456	.word cpu_arm1020e_proc_fin
	457	.word cpu_arm1020e_reset
	458	.word cpu_arm1020e_do_idle
	459	.word cpu_arm1020e_dcache_clean_area
	460	.word cpu_arm1020e_switch_mm
	461	.word cpu_arm1020e_set_pte
	462	.size arm1020e_processor_functions, . - arm1020e_processor_functions
	463
	464	.section ".rodata"
	465
	466	.type cpu_arch_name, #object
	467	cpu_arch_name:
	468	.asciz "armv5te"
	469	.size cpu_arch_name, . - cpu_arch_name
	470
	471	.type cpu_elf_name, #object
	472	cpu_elf_name:
	473	.asciz "v5"
	474	.size cpu_elf_name, . - cpu_elf_name
	475
	476	.type cpu_arm1020e_name, #object
	477	cpu_arm1020e_name:
264edb35	478	.asciz "ARM1020E"
1da177e4 LT	479	.size cpu_arm1020e_name, . - cpu_arm1020e_name
	480
	481	.align
	482
02b7dd12	483	.section ".proc.info.init", #alloc, #execinstr
1da177e4 LT	484
	485	.type __arm1020e_proc_info,#object
	486	__arm1020e_proc_info:
	487	.long 0x4105a200 @ ARM 1020TE (Architecture v5TE)
	488	.long 0xff0ffff0
8799ee9f RK	489	.long PMD_TYPE_SECT \| \
	490	PMD_BIT4 \| \
	491	PMD_SECT_AP_WRITE \| \
	492	PMD_SECT_AP_READ
1da177e4 LT	493	.long PMD_TYPE_SECT \| \
	494	PMD_BIT4 \| \
	495	PMD_SECT_AP_WRITE \| \
	496	PMD_SECT_AP_READ
	497	b __arm1020e_setup
	498	.long cpu_arch_name
	499	.long cpu_elf_name
	500	.long HWCAP_SWP \| HWCAP_HALF \| HWCAP_THUMB \| HWCAP_EDSP
	501	.long cpu_arm1020e_name
	502	.long arm1020e_processor_functions
	503	.long v4wbi_tlb_fns
	504	.long v4wb_user_fns
	505	.long arm1020e_cache_fns
	506	.size __arm1020e_proc_info, . - __arm1020e_proc_info