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 */
mn10300_icache_inv(void)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 */
mn10300_icache_inv_page(unsigned long start)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 */
mn10300_icache_inv_range(unsigned long start,unsigned long end)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 */
mn10300_icache_inv_range2(unsigned long start,unsigned long size)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 */
mn10300_dcache_inv(void)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 */
mn10300_dcache_inv_page(unsigned long start)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 */
mn10300_dcache_inv_range(unsigned long start,unsigned long end)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 */
mn10300_dcache_inv_range2(unsigned long start,unsigned long size)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 }
154