Akira Takeuchi | 8be0628 | 2010-10-27 17:28:47 +0100 | [diff] [blame] | 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 | } |