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 */
20void 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 */
37void 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 */
57void 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 */
75void 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 */
90void 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 */
107void 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 */
127void 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 */
145void 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