2 * linux/arch/arm/mm/cache-v3.S
4 * Copyright (C) 1997-2002 Russell king
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #include <linux/linkage.h>
11 #include <linux/init.h>
13 #include "proc-macros.S"
16 * flush_user_cache_all()
18 * Invalidate all cache entries in a particular address
21 * - mm - mm_struct describing address space
23 ENTRY(v3_flush_user_cache_all)
26 * flush_kern_cache_all()
28 * Clean and invalidate the entire cache.
30 ENTRY(v3_flush_kern_cache_all)
34 * flush_user_cache_range(start, end, flags)
36 * Invalidate a range of cache entries in the specified
39 * - start - start address (may not be aligned)
40 * - end - end address (exclusive, may not be aligned)
41 * - flags - vma_area_struct flags describing address space
43 ENTRY(v3_flush_user_cache_range)
45 mcreq p15, 0, ip, c7, c0, 0 @ flush ID cache
49 * coherent_kern_range(start, end)
51 * Ensure coherency between the Icache and the Dcache in the
52 * region described by start. If you have non-snooping
53 * Harvard caches, you need to implement this function.
55 * - start - virtual start address
56 * - end - virtual end address
58 ENTRY(v3_coherent_kern_range)
62 * coherent_user_range(start, end)
64 * Ensure coherency between the Icache and the Dcache in the
65 * region described by start. If you have non-snooping
66 * Harvard caches, you need to implement this function.
68 * - start - virtual start address
69 * - end - virtual end address
71 ENTRY(v3_coherent_user_range)
75 * flush_kern_dcache_area(void *page, size_t size)
77 * Ensure no D cache aliasing occurs, either with itself or
80 * - addr - kernel address
81 * - size - region size
83 ENTRY(v3_flush_kern_dcache_area)
87 * dma_flush_range(start, end)
89 * Clean and invalidate the specified virtual address range.
91 * - start - virtual start address
92 * - end - virtual end address
94 ENTRY(v3_dma_flush_range)
96 mcr p15, 0, r0, c7, c0, 0 @ flush ID cache
100 * dma_unmap_area(start, size, dir)
101 * - start - kernel virtual start address
102 * - size - size of region
103 * - dir - DMA direction
105 ENTRY(v3_dma_unmap_area)
106 teq r2, #DMA_TO_DEVICE
107 bne v3_dma_flush_range
111 * dma_map_area(start, size, dir)
112 * - start - kernel virtual start address
113 * - size - size of region
114 * - dir - DMA direction
116 ENTRY(v3_dma_map_area)
118 ENDPROC(v3_dma_unmap_area)
119 ENDPROC(v3_dma_map_area)
123 .type v3_cache_fns, #object
125 .long v3_flush_kern_cache_all
126 .long v3_flush_user_cache_all
127 .long v3_flush_user_cache_range
128 .long v3_coherent_kern_range
129 .long v3_coherent_user_range
130 .long v3_flush_kern_dcache_area
131 .long v3_dma_map_area
132 .long v3_dma_unmap_area
133 .long v3_dma_flush_range
134 .size v3_cache_fns, . - v3_cache_fns