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8be06289 AT |
1 | /* Functions for global i/dcache invalidation when caching in SMP |
2 | * | |
3 | * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public Licence | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the Licence, or (at your option) any later version. | |
10 | */ | |
11 | #include <linux/mm.h> | |
12 | #include <asm/cacheflush.h> | |
13 | #include "cache-smp.h" | |
14 | ||
15 | /** | |
16 | * mn10300_icache_inv - Globally invalidate instruction cache | |
17 | * | |
18 | * Invalidate the instruction cache on all CPUs. | |
19 | */ | |
20 | void mn10300_icache_inv(void) | |
21 | { | |
22 | unsigned long flags; | |
23 | ||
24 | flags = smp_lock_cache(); | |
25 | mn10300_local_icache_inv(); | |
26 | smp_cache_call(SMP_ICACHE_INV, 0, 0); | |
27 | smp_unlock_cache(flags); | |
28 | } | |
29 | ||
30 | /** | |
31 | * mn10300_icache_inv_page - Globally invalidate a page of instruction cache | |
32 | * @start: The address of the page of memory to be invalidated. | |
33 | * | |
34 | * Invalidate a range of addresses in the instruction cache on all CPUs | |
35 | * covering the page that includes the given address. | |
36 | */ | |
37 | void mn10300_icache_inv_page(unsigned long start) | |
38 | { | |
39 | unsigned long flags; | |
40 | ||
41 | start &= ~(PAGE_SIZE-1); | |
42 | ||
43 | flags = smp_lock_cache(); | |
44 | mn10300_local_icache_inv_page(start); | |
45 | smp_cache_call(SMP_ICACHE_INV_RANGE, start, start + PAGE_SIZE); | |
46 | smp_unlock_cache(flags); | |
47 | } | |
48 | ||
49 | /** | |
50 | * mn10300_icache_inv_range - Globally invalidate range of instruction cache | |
51 | * @start: The start address of the region to be invalidated. | |
52 | * @end: The end address of the region to be invalidated. | |
53 | * | |
54 | * Invalidate a range of addresses in the instruction cache on all CPUs, | |
55 | * between start and end-1 inclusive. | |
56 | */ | |
57 | void mn10300_icache_inv_range(unsigned long start, unsigned long end) | |
58 | { | |
59 | unsigned long flags; | |
60 | ||
61 | flags = smp_lock_cache(); | |
62 | mn10300_local_icache_inv_range(start, end); | |
63 | smp_cache_call(SMP_ICACHE_INV_RANGE, start, end); | |
64 | smp_unlock_cache(flags); | |
65 | } | |
66 | ||
67 | /** | |
68 | * mn10300_icache_inv_range2 - Globally invalidate range of instruction cache | |
69 | * @start: The start address of the region to be invalidated. | |
70 | * @size: The size of the region to be invalidated. | |
71 | * | |
72 | * Invalidate a range of addresses in the instruction cache on all CPUs, | |
73 | * between start and start+size-1 inclusive. | |
74 | */ | |
75 | void mn10300_icache_inv_range2(unsigned long start, unsigned long size) | |
76 | { | |
77 | unsigned long flags; | |
78 | ||
79 | flags = smp_lock_cache(); | |
80 | mn10300_local_icache_inv_range2(start, size); | |
81 | smp_cache_call(SMP_ICACHE_INV_RANGE, start, start + size); | |
82 | smp_unlock_cache(flags); | |
83 | } | |
84 | ||
85 | /** | |
86 | * mn10300_dcache_inv - Globally invalidate data cache | |
87 | * | |
88 | * Invalidate the data cache on all CPUs. | |
89 | */ | |
90 | void mn10300_dcache_inv(void) | |
91 | { | |
92 | unsigned long flags; | |
93 | ||
94 | flags = smp_lock_cache(); | |
95 | mn10300_local_dcache_inv(); | |
96 | smp_cache_call(SMP_DCACHE_INV, 0, 0); | |
97 | smp_unlock_cache(flags); | |
98 | } | |
99 | ||
100 | /** | |
101 | * mn10300_dcache_inv_page - Globally invalidate a page of data cache | |
102 | * @start: The address of the page of memory to be invalidated. | |
103 | * | |
104 | * Invalidate a range of addresses in the data cache on all CPUs covering the | |
105 | * page that includes the given address. | |
106 | */ | |
107 | void mn10300_dcache_inv_page(unsigned long start) | |
108 | { | |
109 | unsigned long flags; | |
110 | ||
111 | start &= ~(PAGE_SIZE-1); | |
112 | ||
113 | flags = smp_lock_cache(); | |
114 | mn10300_local_dcache_inv_page(start); | |
115 | smp_cache_call(SMP_DCACHE_INV_RANGE, start, start + PAGE_SIZE); | |
116 | smp_unlock_cache(flags); | |
117 | } | |
118 | ||
119 | /** | |
120 | * mn10300_dcache_inv_range - Globally invalidate range of data cache | |
121 | * @start: The start address of the region to be invalidated. | |
122 | * @end: The end address of the region to be invalidated. | |
123 | * | |
124 | * Invalidate a range of addresses in the data cache on all CPUs, between start | |
125 | * and end-1 inclusive. | |
126 | */ | |
127 | void mn10300_dcache_inv_range(unsigned long start, unsigned long end) | |
128 | { | |
129 | unsigned long flags; | |
130 | ||
131 | flags = smp_lock_cache(); | |
132 | mn10300_local_dcache_inv_range(start, end); | |
133 | smp_cache_call(SMP_DCACHE_INV_RANGE, start, end); | |
134 | smp_unlock_cache(flags); | |
135 | } | |
136 | ||
137 | /** | |
138 | * mn10300_dcache_inv_range2 - Globally invalidate range of data cache | |
139 | * @start: The start address of the region to be invalidated. | |
140 | * @size: The size of the region to be invalidated. | |
141 | * | |
142 | * Invalidate a range of addresses in the data cache on all CPUs, between start | |
143 | * and start+size-1 inclusive. | |
144 | */ | |
145 | void mn10300_dcache_inv_range2(unsigned long start, unsigned long size) | |
146 | { | |
147 | unsigned long flags; | |
148 | ||
149 | flags = smp_lock_cache(); | |
150 | mn10300_local_dcache_inv_range2(start, size); | |
151 | smp_cache_call(SMP_DCACHE_INV_RANGE, start, start + size); | |
152 | smp_unlock_cache(flags); | |
153 | } |