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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mm/cache-v3.S | |
3 | * | |
4 | * Copyright (C) 1997-2002 Russell king | |
5 | * | |
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. | |
9 | */ | |
10 | #include <linux/linkage.h> | |
11 | #include <linux/init.h> | |
1da177e4 LT |
12 | #include <asm/page.h> |
13 | #include "proc-macros.S" | |
14 | ||
15 | /* | |
16 | * flush_user_cache_all() | |
17 | * | |
18 | * Invalidate all cache entries in a particular address | |
19 | * space. | |
20 | * | |
21 | * - mm - mm_struct describing address space | |
22 | */ | |
23 | ENTRY(v3_flush_user_cache_all) | |
24 | /* FALLTHROUGH */ | |
25 | /* | |
26 | * flush_kern_cache_all() | |
27 | * | |
28 | * Clean and invalidate the entire cache. | |
29 | */ | |
30 | ENTRY(v3_flush_kern_cache_all) | |
31 | /* FALLTHROUGH */ | |
32 | ||
33 | /* | |
34 | * flush_user_cache_range(start, end, flags) | |
35 | * | |
36 | * Invalidate a range of cache entries in the specified | |
37 | * address space. | |
38 | * | |
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 | |
42 | */ | |
43 | ENTRY(v3_flush_user_cache_range) | |
44 | mov ip, #0 | |
45 | mcreq p15, 0, ip, c7, c0, 0 @ flush ID cache | |
46 | mov pc, lr | |
47 | ||
48 | /* | |
49 | * coherent_kern_range(start, end) | |
50 | * | |
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. | |
54 | * | |
55 | * - start - virtual start address | |
56 | * - end - virtual end address | |
57 | */ | |
58 | ENTRY(v3_coherent_kern_range) | |
59 | /* FALLTHROUGH */ | |
60 | ||
61 | /* | |
62 | * coherent_user_range(start, end) | |
63 | * | |
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. | |
67 | * | |
68 | * - start - virtual start address | |
69 | * - end - virtual end address | |
70 | */ | |
71 | ENTRY(v3_coherent_user_range) | |
72 | mov pc, lr | |
73 | ||
74 | /* | |
75 | * flush_kern_dcache_page(void *page) | |
76 | * | |
77 | * Ensure no D cache aliasing occurs, either with itself or | |
78 | * the I cache | |
79 | * | |
80 | * - addr - page aligned address | |
81 | */ | |
82 | ENTRY(v3_flush_kern_dcache_page) | |
83 | /* FALLTHROUGH */ | |
84 | ||
85 | /* | |
86 | * dma_inv_range(start, end) | |
87 | * | |
88 | * Invalidate (discard) the specified virtual address range. | |
89 | * May not write back any entries. If 'start' or 'end' | |
90 | * are not cache line aligned, those lines must be written | |
91 | * back. | |
92 | * | |
93 | * - start - virtual start address | |
94 | * - end - virtual end address | |
95 | */ | |
96 | ENTRY(v3_dma_inv_range) | |
97 | /* FALLTHROUGH */ | |
98 | ||
99 | /* | |
100 | * dma_flush_range(start, end) | |
101 | * | |
102 | * Clean and invalidate the specified virtual address range. | |
103 | * | |
104 | * - start - virtual start address | |
105 | * - end - virtual end address | |
106 | */ | |
107 | ENTRY(v3_dma_flush_range) | |
108 | mov r0, #0 | |
109 | mcr p15, 0, r0, c7, c0, 0 @ flush ID cache | |
110 | /* FALLTHROUGH */ | |
111 | ||
112 | /* | |
113 | * dma_clean_range(start, end) | |
114 | * | |
115 | * Clean (write back) the specified virtual address range. | |
116 | * | |
117 | * - start - virtual start address | |
118 | * - end - virtual end address | |
119 | */ | |
120 | ENTRY(v3_dma_clean_range) | |
121 | mov pc, lr | |
122 | ||
123 | __INITDATA | |
124 | ||
125 | .type v3_cache_fns, #object | |
126 | ENTRY(v3_cache_fns) | |
127 | .long v3_flush_kern_cache_all | |
128 | .long v3_flush_user_cache_all | |
129 | .long v3_flush_user_cache_range | |
130 | .long v3_coherent_kern_range | |
131 | .long v3_coherent_user_range | |
132 | .long v3_flush_kern_dcache_page | |
133 | .long v3_dma_inv_range | |
134 | .long v3_dma_clean_range | |
135 | .long v3_dma_flush_range | |
136 | .size v3_cache_fns, . - v3_cache_fns |