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1 | /* Functions for global dcache flush when writeback 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_dcache_flush - Globally flush data cache | |
17 | * | |
18 | * Flush the data cache on all CPUs. | |
19 | */ | |
20 | void mn10300_dcache_flush(void) | |
21 | { | |
22 | unsigned long flags; | |
23 | ||
24 | flags = smp_lock_cache(); | |
25 | mn10300_local_dcache_flush(); | |
26 | smp_cache_call(SMP_DCACHE_FLUSH, 0, 0); | |
27 | smp_unlock_cache(flags); | |
28 | } | |
29 | ||
30 | /** | |
31 | * mn10300_dcache_flush_page - Globally flush a page of data cache | |
32 | * @start: The address of the page of memory to be flushed. | |
33 | * | |
34 | * Flush a range of addresses in the data cache on all CPUs covering | |
35 | * the page that includes the given address. | |
36 | */ | |
37 | void mn10300_dcache_flush_page(unsigned long start) | |
38 | { | |
39 | unsigned long flags; | |
40 | ||
41 | start &= ~(PAGE_SIZE-1); | |
42 | ||
43 | flags = smp_lock_cache(); | |
44 | mn10300_local_dcache_flush_page(start); | |
45 | smp_cache_call(SMP_DCACHE_FLUSH_RANGE, start, start + PAGE_SIZE); | |
46 | smp_unlock_cache(flags); | |
47 | } | |
48 | ||
49 | /** | |
50 | * mn10300_dcache_flush_range - Globally flush range of data cache | |
51 | * @start: The start address of the region to be flushed. | |
52 | * @end: The end address of the region to be flushed. | |
53 | * | |
54 | * Flush a range of addresses in the data cache on all CPUs, between start and | |
55 | * end-1 inclusive. | |
56 | */ | |
57 | void mn10300_dcache_flush_range(unsigned long start, unsigned long end) | |
58 | { | |
59 | unsigned long flags; | |
60 | ||
61 | flags = smp_lock_cache(); | |
62 | mn10300_local_dcache_flush_range(start, end); | |
63 | smp_cache_call(SMP_DCACHE_FLUSH_RANGE, start, end); | |
64 | smp_unlock_cache(flags); | |
65 | } | |
66 | ||
67 | /** | |
68 | * mn10300_dcache_flush_range2 - Globally flush range of data cache | |
69 | * @start: The start address of the region to be flushed. | |
70 | * @size: The size of the region to be flushed. | |
71 | * | |
72 | * Flush a range of addresses in the data cache on all CPUs, between start and | |
73 | * start+size-1 inclusive. | |
74 | */ | |
75 | void mn10300_dcache_flush_range2(unsigned long start, unsigned long size) | |
76 | { | |
77 | unsigned long flags; | |
78 | ||
79 | flags = smp_lock_cache(); | |
80 | mn10300_local_dcache_flush_range2(start, size); | |
81 | smp_cache_call(SMP_DCACHE_FLUSH_RANGE, start, start + size); | |
82 | smp_unlock_cache(flags); | |
83 | } | |
84 | ||
85 | /** | |
86 | * mn10300_dcache_flush_inv - Globally flush and invalidate data cache | |
87 | * | |
88 | * Flush and invalidate the data cache on all CPUs. | |
89 | */ | |
90 | void mn10300_dcache_flush_inv(void) | |
91 | { | |
92 | unsigned long flags; | |
93 | ||
94 | flags = smp_lock_cache(); | |
95 | mn10300_local_dcache_flush_inv(); | |
96 | smp_cache_call(SMP_DCACHE_FLUSH_INV, 0, 0); | |
97 | smp_unlock_cache(flags); | |
98 | } | |
99 | ||
100 | /** | |
101 | * mn10300_dcache_flush_inv_page - Globally flush and invalidate a page of data | |
102 | * cache | |
103 | * @start: The address of the page of memory to be flushed and invalidated. | |
104 | * | |
105 | * Flush and invalidate a range of addresses in the data cache on all CPUs | |
106 | * covering the page that includes the given address. | |
107 | */ | |
108 | void mn10300_dcache_flush_inv_page(unsigned long start) | |
109 | { | |
110 | unsigned long flags; | |
111 | ||
112 | start &= ~(PAGE_SIZE-1); | |
113 | ||
114 | flags = smp_lock_cache(); | |
115 | mn10300_local_dcache_flush_inv_page(start); | |
116 | smp_cache_call(SMP_DCACHE_FLUSH_INV_RANGE, start, start + PAGE_SIZE); | |
117 | smp_unlock_cache(flags); | |
118 | } | |
119 | ||
120 | /** | |
121 | * mn10300_dcache_flush_inv_range - Globally flush and invalidate range of data | |
122 | * cache | |
123 | * @start: The start address of the region to be flushed and invalidated. | |
124 | * @end: The end address of the region to be flushed and invalidated. | |
125 | * | |
126 | * Flush and invalidate a range of addresses in the data cache on all CPUs, | |
127 | * between start and end-1 inclusive. | |
128 | */ | |
129 | void mn10300_dcache_flush_inv_range(unsigned long start, unsigned long end) | |
130 | { | |
131 | unsigned long flags; | |
132 | ||
133 | flags = smp_lock_cache(); | |
134 | mn10300_local_dcache_flush_inv_range(start, end); | |
135 | smp_cache_call(SMP_DCACHE_FLUSH_INV_RANGE, start, end); | |
136 | smp_unlock_cache(flags); | |
137 | } | |
138 | ||
139 | /** | |
140 | * mn10300_dcache_flush_inv_range2 - Globally flush and invalidate range of data | |
141 | * cache | |
142 | * @start: The start address of the region to be flushed and invalidated. | |
143 | * @size: The size of the region to be flushed and invalidated. | |
144 | * | |
145 | * Flush and invalidate a range of addresses in the data cache on all CPUs, | |
146 | * between start and start+size-1 inclusive. | |
147 | */ | |
148 | void mn10300_dcache_flush_inv_range2(unsigned long start, unsigned long size) | |
149 | { | |
150 | unsigned long flags; | |
151 | ||
152 | flags = smp_lock_cache(); | |
153 | mn10300_local_dcache_flush_inv_range2(start, size); | |
154 | smp_cache_call(SMP_DCACHE_FLUSH_INV_RANGE, start, start + size); | |
155 | smp_unlock_cache(flags); | |
156 | } |