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/*
* linux/arch/arm/mm/cache-v4.S
*
* Copyright (C) 1997-2002 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.
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/page.h>
#include "proc-macros.S"
/*
* flush_user_cache_all()
*
* Invalidate all cache entries in a particular address
* space.
*
* - mm - mm_struct describing address space
*/
ENTRY(v4_flush_user_cache_all)
/* FALLTHROUGH */
/*
* flush_kern_cache_all()
*
* Clean and invalidate the entire cache.
*/
ENTRY(v4_flush_kern_cache_all)
#ifdef CONFIG_CPU_CP15
mov r0, #0
mcr p15, 0, r0, c7, c7, 0 @ flush ID cache
mov pc, lr
#else
/* FALLTHROUGH */
#endif
/*
* flush_user_cache_range(start, end, flags)
*
* Invalidate a range of cache entries in the specified
* address space.
*
* - start - start address (may not be aligned)
* - end - end address (exclusive, may not be aligned)
* - flags - vma_area_struct flags describing address space
*/
ENTRY(v4_flush_user_cache_range)
#ifdef CONFIG_CPU_CP15
mov ip, #0
mcreq p15, 0, ip, c7, c7, 0 @ flush ID cache
mov pc, lr
#else
/* FALLTHROUGH */
#endif
/*
* 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(v4_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(v4_coherent_user_range)
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(v4_flush_kern_dcache_area)
/* FALLTHROUGH */
/*
* 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
*/
ENTRY(v4_dma_inv_range)
/* FALLTHROUGH */
/*
* dma_flush_range(start, end)
*
* Clean and invalidate the specified virtual address range.
*
* - start - virtual start address
* - end - virtual end address
*/
ENTRY(v4_dma_flush_range)
#ifdef CONFIG_CPU_CP15
mov r0, #0
mcr p15, 0, r0, c7, c7, 0 @ flush ID cache
#endif
/* FALLTHROUGH */
/*
* dma_clean_range(start, end)
*
* Clean (write back) the specified virtual address range.
*
* - start - virtual start address
* - end - virtual end address
*/
ENTRY(v4_dma_clean_range)
mov pc, lr
/*
* dma_unmap_area(start, size, dir)
* - start - kernel virtual start address
* - size - size of region
* - dir - DMA direction
*/
ENTRY(v4_dma_unmap_area)
teq r2, #DMA_TO_DEVICE
bne v4_dma_inv_range
/* FALLTHROUGH */
/*
* dma_map_area(start, size, dir)
* - start - kernel virtual start address
* - size - size of region
* - dir - DMA direction
*/
ENTRY(v4_dma_map_area)
mov pc, lr
ENDPROC(v4_dma_unmap_area)
ENDPROC(v4_dma_map_area)
__INITDATA
.type v4_cache_fns, #object
ENTRY(v4_cache_fns)
.long v4_flush_kern_cache_all
.long v4_flush_user_cache_all
.long v4_flush_user_cache_range
.long v4_coherent_kern_range
.long v4_coherent_user_range
.long v4_flush_kern_dcache_area
.long v4_dma_map_area
.long v4_dma_unmap_area
.long v4_dma_inv_range
.long v4_dma_clean_range
.long v4_dma_flush_range
.size v4_cache_fns, . - v4_cache_fns
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