Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 2 | * arch/sh/mm/cache.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 1999, 2000, 2002 Niibe Yutaka |
Paul Mundt | a6198a2 | 2010-01-15 14:21:37 +0900 | [diff] [blame] | 5 | * Copyright (C) 2002 - 2010 Paul Mundt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * Released under the terms of the GNU GPL v2.0. |
| 8 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/mm.h> |
Paul Mundt | acca4f4 | 2008-11-10 20:00:45 +0900 | [diff] [blame] | 10 | #include <linux/init.h> |
Paul Mundt | 52e2778 | 2006-11-21 11:09:41 +0900 | [diff] [blame] | 11 | #include <linux/mutex.h> |
Paul Mundt | e06c4e5 | 2007-07-31 13:01:43 +0900 | [diff] [blame] | 12 | #include <linux/fs.h> |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 13 | #include <linux/smp.h> |
Paul Mundt | 7747b9a | 2007-11-05 16:12:32 +0900 | [diff] [blame] | 14 | #include <linux/highmem.h> |
| 15 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <asm/mmu_context.h> |
| 17 | #include <asm/cacheflush.h> |
| 18 | |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 19 | void (*local_flush_cache_all)(void *args) = cache_noop; |
| 20 | void (*local_flush_cache_mm)(void *args) = cache_noop; |
| 21 | void (*local_flush_cache_dup_mm)(void *args) = cache_noop; |
| 22 | void (*local_flush_cache_page)(void *args) = cache_noop; |
| 23 | void (*local_flush_cache_range)(void *args) = cache_noop; |
| 24 | void (*local_flush_dcache_page)(void *args) = cache_noop; |
| 25 | void (*local_flush_icache_range)(void *args) = cache_noop; |
| 26 | void (*local_flush_icache_page)(void *args) = cache_noop; |
| 27 | void (*local_flush_cache_sigtramp)(void *args) = cache_noop; |
| 28 | |
Paul Mundt | 37443ef | 2009-08-15 12:29:49 +0900 | [diff] [blame] | 29 | void (*__flush_wback_region)(void *start, int size); |
Paul Mundt | 0a993b0 | 2009-10-27 10:51:35 +0900 | [diff] [blame] | 30 | EXPORT_SYMBOL(__flush_wback_region); |
Paul Mundt | 37443ef | 2009-08-15 12:29:49 +0900 | [diff] [blame] | 31 | void (*__flush_purge_region)(void *start, int size); |
Paul Mundt | 0a993b0 | 2009-10-27 10:51:35 +0900 | [diff] [blame] | 32 | EXPORT_SYMBOL(__flush_purge_region); |
Paul Mundt | 37443ef | 2009-08-15 12:29:49 +0900 | [diff] [blame] | 33 | void (*__flush_invalidate_region)(void *start, int size); |
Paul Mundt | 0a993b0 | 2009-10-27 10:51:35 +0900 | [diff] [blame] | 34 | EXPORT_SYMBOL(__flush_invalidate_region); |
Paul Mundt | 37443ef | 2009-08-15 12:29:49 +0900 | [diff] [blame] | 35 | |
Paul Mundt | 37443ef | 2009-08-15 12:29:49 +0900 | [diff] [blame] | 36 | static inline void noop__flush_region(void *start, int size) |
| 37 | { |
| 38 | } |
| 39 | |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 40 | static inline void cacheop_on_each_cpu(void (*func) (void *info), void *info, |
| 41 | int wait) |
| 42 | { |
| 43 | preempt_disable(); |
Paul Mundt | a6198a2 | 2010-01-15 14:21:37 +0900 | [diff] [blame] | 44 | |
Rich Felker | a1e262f | 2016-02-15 18:36:33 +0000 | [diff] [blame] | 45 | /* Needing IPI for cross-core flush is SHX3-specific. */ |
| 46 | #ifdef CONFIG_CPU_SHX3 |
Paul Mundt | a6198a2 | 2010-01-15 14:21:37 +0900 | [diff] [blame] | 47 | /* |
| 48 | * It's possible that this gets called early on when IRQs are |
| 49 | * still disabled due to ioremapping by the boot CPU, so don't |
| 50 | * even attempt IPIs unless there are other CPUs online. |
| 51 | */ |
| 52 | if (num_online_cpus() > 1) |
| 53 | smp_call_function(func, info, wait); |
Rich Felker | a1e262f | 2016-02-15 18:36:33 +0000 | [diff] [blame] | 54 | #endif |
Paul Mundt | a6198a2 | 2010-01-15 14:21:37 +0900 | [diff] [blame] | 55 | |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 56 | func(info); |
Paul Mundt | a6198a2 | 2010-01-15 14:21:37 +0900 | [diff] [blame] | 57 | |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 58 | preempt_enable(); |
| 59 | } |
| 60 | |
Paul Mundt | ba1789e | 2007-11-05 16:18:16 +0900 | [diff] [blame] | 61 | void copy_to_user_page(struct vm_area_struct *vma, struct page *page, |
| 62 | unsigned long vaddr, void *dst, const void *src, |
| 63 | unsigned long len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
Kirill A. Shutemov | e1534ae | 2016-01-15 16:53:46 -0800 | [diff] [blame] | 65 | if (boot_cpu_data.dcache.n_aliases && page_mapcount(page) && |
Paul Mundt | 55661fc | 2010-12-01 15:39:51 +0900 | [diff] [blame] | 66 | test_bit(PG_dcache_clean, &page->flags)) { |
Paul Mundt | 2277ab4 | 2009-07-22 19:20:49 +0900 | [diff] [blame] | 67 | void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK); |
| 68 | memcpy(vto, src, len); |
Paul Mundt | 0906a3a | 2009-09-03 17:21:10 +0900 | [diff] [blame] | 69 | kunmap_coherent(vto); |
Paul Mundt | 2277ab4 | 2009-07-22 19:20:49 +0900 | [diff] [blame] | 70 | } else { |
| 71 | memcpy(dst, src, len); |
Paul Mundt | 0dfae7d | 2009-07-27 21:30:17 +0900 | [diff] [blame] | 72 | if (boot_cpu_data.dcache.n_aliases) |
Paul Mundt | 55661fc | 2010-12-01 15:39:51 +0900 | [diff] [blame] | 73 | clear_bit(PG_dcache_clean, &page->flags); |
Paul Mundt | 2277ab4 | 2009-07-22 19:20:49 +0900 | [diff] [blame] | 74 | } |
Paul Mundt | ba1789e | 2007-11-05 16:18:16 +0900 | [diff] [blame] | 75 | |
| 76 | if (vma->vm_flags & VM_EXEC) |
| 77 | flush_cache_page(vma, vaddr, page_to_pfn(page)); |
| 78 | } |
| 79 | |
| 80 | void copy_from_user_page(struct vm_area_struct *vma, struct page *page, |
| 81 | unsigned long vaddr, void *dst, const void *src, |
| 82 | unsigned long len) |
| 83 | { |
Kirill A. Shutemov | e1534ae | 2016-01-15 16:53:46 -0800 | [diff] [blame] | 84 | if (boot_cpu_data.dcache.n_aliases && page_mapcount(page) && |
Paul Mundt | 55661fc | 2010-12-01 15:39:51 +0900 | [diff] [blame] | 85 | test_bit(PG_dcache_clean, &page->flags)) { |
Paul Mundt | 2277ab4 | 2009-07-22 19:20:49 +0900 | [diff] [blame] | 86 | void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK); |
| 87 | memcpy(dst, vfrom, len); |
Paul Mundt | 0906a3a | 2009-09-03 17:21:10 +0900 | [diff] [blame] | 88 | kunmap_coherent(vfrom); |
Paul Mundt | 2277ab4 | 2009-07-22 19:20:49 +0900 | [diff] [blame] | 89 | } else { |
| 90 | memcpy(dst, src, len); |
Paul Mundt | 0dfae7d | 2009-07-27 21:30:17 +0900 | [diff] [blame] | 91 | if (boot_cpu_data.dcache.n_aliases) |
Paul Mundt | 55661fc | 2010-12-01 15:39:51 +0900 | [diff] [blame] | 92 | clear_bit(PG_dcache_clean, &page->flags); |
Paul Mundt | 2277ab4 | 2009-07-22 19:20:49 +0900 | [diff] [blame] | 93 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
Paul Mundt | 39e688a | 2007-03-05 19:46:47 +0900 | [diff] [blame] | 95 | |
Paul Mundt | 7747b9a | 2007-11-05 16:12:32 +0900 | [diff] [blame] | 96 | void copy_user_highpage(struct page *to, struct page *from, |
| 97 | unsigned long vaddr, struct vm_area_struct *vma) |
| 98 | { |
| 99 | void *vfrom, *vto; |
| 100 | |
Cong Wang | bc3e11b | 2011-11-25 23:14:16 +0800 | [diff] [blame] | 101 | vto = kmap_atomic(to); |
Paul Mundt | 7747b9a | 2007-11-05 16:12:32 +0900 | [diff] [blame] | 102 | |
Kirill A. Shutemov | e1534ae | 2016-01-15 16:53:46 -0800 | [diff] [blame] | 103 | if (boot_cpu_data.dcache.n_aliases && page_mapcount(from) && |
Paul Mundt | 55661fc | 2010-12-01 15:39:51 +0900 | [diff] [blame] | 104 | test_bit(PG_dcache_clean, &from->flags)) { |
Paul Mundt | 7e01c94 | 2009-12-04 15:14:52 +0900 | [diff] [blame] | 105 | vfrom = kmap_coherent(from, vaddr); |
Paul Mundt | 2277ab4 | 2009-07-22 19:20:49 +0900 | [diff] [blame] | 106 | copy_page(vto, vfrom); |
Paul Mundt | 7e01c94 | 2009-12-04 15:14:52 +0900 | [diff] [blame] | 107 | kunmap_coherent(vfrom); |
| 108 | } else { |
Cong Wang | bc3e11b | 2011-11-25 23:14:16 +0800 | [diff] [blame] | 109 | vfrom = kmap_atomic(from); |
Paul Mundt | 7e01c94 | 2009-12-04 15:14:52 +0900 | [diff] [blame] | 110 | copy_page(vto, vfrom); |
Cong Wang | bc3e11b | 2011-11-25 23:14:16 +0800 | [diff] [blame] | 111 | kunmap_atomic(vfrom); |
Paul Mundt | 7e01c94 | 2009-12-04 15:14:52 +0900 | [diff] [blame] | 112 | } |
Paul Mundt | 2277ab4 | 2009-07-22 19:20:49 +0900 | [diff] [blame] | 113 | |
Stuart Menefy | a25bbe1 | 2011-01-31 17:50:29 +0000 | [diff] [blame] | 114 | if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK) || |
| 115 | (vma->vm_flags & VM_EXEC)) |
Paul Mundt | 7e01c94 | 2009-12-04 15:14:52 +0900 | [diff] [blame] | 116 | __flush_purge_region(vto, PAGE_SIZE); |
| 117 | |
Cong Wang | bc3e11b | 2011-11-25 23:14:16 +0800 | [diff] [blame] | 118 | kunmap_atomic(vto); |
Paul Mundt | 7747b9a | 2007-11-05 16:12:32 +0900 | [diff] [blame] | 119 | /* Make sure this page is cleared on other CPU's too before using it */ |
| 120 | smp_wmb(); |
| 121 | } |
| 122 | EXPORT_SYMBOL(copy_user_highpage); |
Paul Mundt | dfff0fa | 2009-07-27 20:53:22 +0900 | [diff] [blame] | 123 | |
| 124 | void clear_user_highpage(struct page *page, unsigned long vaddr) |
| 125 | { |
Cong Wang | bc3e11b | 2011-11-25 23:14:16 +0800 | [diff] [blame] | 126 | void *kaddr = kmap_atomic(page); |
Paul Mundt | dfff0fa | 2009-07-27 20:53:22 +0900 | [diff] [blame] | 127 | |
Paul Mundt | 7e01c94 | 2009-12-04 15:14:52 +0900 | [diff] [blame] | 128 | clear_page(kaddr); |
Paul Mundt | dfff0fa | 2009-07-27 20:53:22 +0900 | [diff] [blame] | 129 | |
Paul Mundt | 7e01c94 | 2009-12-04 15:14:52 +0900 | [diff] [blame] | 130 | if (pages_do_alias((unsigned long)kaddr, vaddr & PAGE_MASK)) |
| 131 | __flush_purge_region(kaddr, PAGE_SIZE); |
Paul Mundt | dfff0fa | 2009-07-27 20:53:22 +0900 | [diff] [blame] | 132 | |
Cong Wang | bc3e11b | 2011-11-25 23:14:16 +0800 | [diff] [blame] | 133 | kunmap_atomic(kaddr); |
Paul Mundt | dfff0fa | 2009-07-27 20:53:22 +0900 | [diff] [blame] | 134 | } |
| 135 | EXPORT_SYMBOL(clear_user_highpage); |
Paul Mundt | 9cef749 | 2009-07-29 00:12:17 +0900 | [diff] [blame] | 136 | |
| 137 | void __update_cache(struct vm_area_struct *vma, |
| 138 | unsigned long address, pte_t pte) |
| 139 | { |
| 140 | struct page *page; |
| 141 | unsigned long pfn = pte_pfn(pte); |
| 142 | |
| 143 | if (!boot_cpu_data.dcache.n_aliases) |
| 144 | return; |
| 145 | |
| 146 | page = pfn_to_page(pfn); |
Paul Mundt | 964f7e5 | 2009-10-13 11:18:34 +0900 | [diff] [blame] | 147 | if (pfn_valid(pfn)) { |
Paul Mundt | 55661fc | 2010-12-01 15:39:51 +0900 | [diff] [blame] | 148 | int dirty = !test_and_set_bit(PG_dcache_clean, &page->flags); |
Markus Pietrek | 76382b5 | 2009-12-24 15:12:02 +0900 | [diff] [blame] | 149 | if (dirty) |
| 150 | __flush_purge_region(page_address(page), PAGE_SIZE); |
Paul Mundt | 9cef749 | 2009-07-29 00:12:17 +0900 | [diff] [blame] | 151 | } |
| 152 | } |
Paul Mundt | c0fe478 | 2009-08-04 16:02:43 +0900 | [diff] [blame] | 153 | |
| 154 | void __flush_anon_page(struct page *page, unsigned long vmaddr) |
| 155 | { |
| 156 | unsigned long addr = (unsigned long) page_address(page); |
| 157 | |
| 158 | if (pages_do_alias(addr, vmaddr)) { |
Kirill A. Shutemov | e1534ae | 2016-01-15 16:53:46 -0800 | [diff] [blame] | 159 | if (boot_cpu_data.dcache.n_aliases && page_mapcount(page) && |
Paul Mundt | 55661fc | 2010-12-01 15:39:51 +0900 | [diff] [blame] | 160 | test_bit(PG_dcache_clean, &page->flags)) { |
Paul Mundt | c0fe478 | 2009-08-04 16:02:43 +0900 | [diff] [blame] | 161 | void *kaddr; |
| 162 | |
| 163 | kaddr = kmap_coherent(page, vmaddr); |
Paul Mundt | 6e4154d | 2009-09-08 16:21:00 +0900 | [diff] [blame] | 164 | /* XXX.. For now kunmap_coherent() does a purge */ |
| 165 | /* __flush_purge_region((void *)kaddr, PAGE_SIZE); */ |
Paul Mundt | 0906a3a | 2009-09-03 17:21:10 +0900 | [diff] [blame] | 166 | kunmap_coherent(kaddr); |
Paul Mundt | c0fe478 | 2009-08-04 16:02:43 +0900 | [diff] [blame] | 167 | } else |
Paul Mundt | 6e4154d | 2009-09-08 16:21:00 +0900 | [diff] [blame] | 168 | __flush_purge_region((void *)addr, PAGE_SIZE); |
Paul Mundt | c0fe478 | 2009-08-04 16:02:43 +0900 | [diff] [blame] | 169 | } |
| 170 | } |
Paul Mundt | ecba106 | 2009-08-15 11:05:42 +0900 | [diff] [blame] | 171 | |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 172 | void flush_cache_all(void) |
| 173 | { |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 174 | cacheop_on_each_cpu(local_flush_cache_all, NULL, 1); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 175 | } |
Paul Mundt | 0a993b0 | 2009-10-27 10:51:35 +0900 | [diff] [blame] | 176 | EXPORT_SYMBOL(flush_cache_all); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 177 | |
| 178 | void flush_cache_mm(struct mm_struct *mm) |
| 179 | { |
Paul Mundt | 654d364 | 2009-09-09 14:04:06 +0900 | [diff] [blame] | 180 | if (boot_cpu_data.dcache.n_aliases == 0) |
| 181 | return; |
| 182 | |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 183 | cacheop_on_each_cpu(local_flush_cache_mm, mm, 1); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | void flush_cache_dup_mm(struct mm_struct *mm) |
| 187 | { |
Paul Mundt | 654d364 | 2009-09-09 14:04:06 +0900 | [diff] [blame] | 188 | if (boot_cpu_data.dcache.n_aliases == 0) |
| 189 | return; |
| 190 | |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 191 | cacheop_on_each_cpu(local_flush_cache_dup_mm, mm, 1); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | void flush_cache_page(struct vm_area_struct *vma, unsigned long addr, |
| 195 | unsigned long pfn) |
| 196 | { |
| 197 | struct flusher_data data; |
| 198 | |
| 199 | data.vma = vma; |
| 200 | data.addr1 = addr; |
| 201 | data.addr2 = pfn; |
| 202 | |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 203 | cacheop_on_each_cpu(local_flush_cache_page, (void *)&data, 1); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | void flush_cache_range(struct vm_area_struct *vma, unsigned long start, |
| 207 | unsigned long end) |
| 208 | { |
| 209 | struct flusher_data data; |
| 210 | |
| 211 | data.vma = vma; |
| 212 | data.addr1 = start; |
| 213 | data.addr2 = end; |
| 214 | |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 215 | cacheop_on_each_cpu(local_flush_cache_range, (void *)&data, 1); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 216 | } |
Paul Mundt | 0a993b0 | 2009-10-27 10:51:35 +0900 | [diff] [blame] | 217 | EXPORT_SYMBOL(flush_cache_range); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 218 | |
| 219 | void flush_dcache_page(struct page *page) |
| 220 | { |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 221 | cacheop_on_each_cpu(local_flush_dcache_page, page, 1); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 222 | } |
Paul Mundt | 0a993b0 | 2009-10-27 10:51:35 +0900 | [diff] [blame] | 223 | EXPORT_SYMBOL(flush_dcache_page); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 224 | |
| 225 | void flush_icache_range(unsigned long start, unsigned long end) |
| 226 | { |
| 227 | struct flusher_data data; |
| 228 | |
| 229 | data.vma = NULL; |
| 230 | data.addr1 = start; |
| 231 | data.addr2 = end; |
| 232 | |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 233 | cacheop_on_each_cpu(local_flush_icache_range, (void *)&data, 1); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 234 | } |
Pranith Kumar | e356030 | 2014-08-29 15:19:09 -0700 | [diff] [blame] | 235 | EXPORT_SYMBOL(flush_icache_range); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 236 | |
| 237 | void flush_icache_page(struct vm_area_struct *vma, struct page *page) |
| 238 | { |
| 239 | /* Nothing uses the VMA, so just pass the struct page along */ |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 240 | cacheop_on_each_cpu(local_flush_icache_page, page, 1); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | void flush_cache_sigtramp(unsigned long address) |
| 244 | { |
Paul Mundt | 6f37957 | 2009-09-01 21:21:36 +0900 | [diff] [blame] | 245 | cacheop_on_each_cpu(local_flush_cache_sigtramp, (void *)address, 1); |
Paul Mundt | f26b2a5 | 2009-08-21 17:23:14 +0900 | [diff] [blame] | 246 | } |
| 247 | |
Paul Mundt | 27d59ec | 2009-08-15 11:11:16 +0900 | [diff] [blame] | 248 | static void compute_alias(struct cache_info *c) |
| 249 | { |
Rich Felker | 57155c6 | 2016-03-22 22:02:23 +0000 | [diff] [blame] | 250 | #ifdef CONFIG_MMU |
Paul Mundt | 27d59ec | 2009-08-15 11:11:16 +0900 | [diff] [blame] | 251 | c->alias_mask = ((c->sets - 1) << c->entry_shift) & ~(PAGE_SIZE - 1); |
Rich Felker | 57155c6 | 2016-03-22 22:02:23 +0000 | [diff] [blame] | 252 | #else |
| 253 | c->alias_mask = 0; |
| 254 | #endif |
Paul Mundt | 27d59ec | 2009-08-15 11:11:16 +0900 | [diff] [blame] | 255 | c->n_aliases = c->alias_mask ? (c->alias_mask >> PAGE_SHIFT) + 1 : 0; |
| 256 | } |
| 257 | |
| 258 | static void __init emit_cache_params(void) |
| 259 | { |
| 260 | printk(KERN_NOTICE "I-cache : n_ways=%d n_sets=%d way_incr=%d\n", |
| 261 | boot_cpu_data.icache.ways, |
| 262 | boot_cpu_data.icache.sets, |
| 263 | boot_cpu_data.icache.way_incr); |
| 264 | printk(KERN_NOTICE "I-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n", |
| 265 | boot_cpu_data.icache.entry_mask, |
| 266 | boot_cpu_data.icache.alias_mask, |
| 267 | boot_cpu_data.icache.n_aliases); |
| 268 | printk(KERN_NOTICE "D-cache : n_ways=%d n_sets=%d way_incr=%d\n", |
| 269 | boot_cpu_data.dcache.ways, |
| 270 | boot_cpu_data.dcache.sets, |
| 271 | boot_cpu_data.dcache.way_incr); |
| 272 | printk(KERN_NOTICE "D-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n", |
| 273 | boot_cpu_data.dcache.entry_mask, |
| 274 | boot_cpu_data.dcache.alias_mask, |
| 275 | boot_cpu_data.dcache.n_aliases); |
| 276 | |
| 277 | /* |
| 278 | * Emit Secondary Cache parameters if the CPU has a probed L2. |
| 279 | */ |
| 280 | if (boot_cpu_data.flags & CPU_HAS_L2_CACHE) { |
| 281 | printk(KERN_NOTICE "S-cache : n_ways=%d n_sets=%d way_incr=%d\n", |
| 282 | boot_cpu_data.scache.ways, |
| 283 | boot_cpu_data.scache.sets, |
| 284 | boot_cpu_data.scache.way_incr); |
| 285 | printk(KERN_NOTICE "S-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n", |
| 286 | boot_cpu_data.scache.entry_mask, |
| 287 | boot_cpu_data.scache.alias_mask, |
| 288 | boot_cpu_data.scache.n_aliases); |
| 289 | } |
| 290 | } |
| 291 | |
Paul Mundt | ecba106 | 2009-08-15 11:05:42 +0900 | [diff] [blame] | 292 | void __init cpu_cache_init(void) |
| 293 | { |
Paul Mundt | 3af539e | 2009-11-12 17:03:28 +0900 | [diff] [blame] | 294 | unsigned int cache_disabled = 0; |
| 295 | |
Geert Uytterhoeven | a5f6ea2 | 2014-03-03 15:38:33 -0800 | [diff] [blame] | 296 | #ifdef SH_CCR |
| 297 | cache_disabled = !(__raw_readl(SH_CCR) & CCR_CACHE_ENABLE); |
Paul Mundt | 3af539e | 2009-11-12 17:03:28 +0900 | [diff] [blame] | 298 | #endif |
Magnus Damm | 5fb80ae | 2009-10-16 14:38:48 +0900 | [diff] [blame] | 299 | |
Paul Mundt | 27d59ec | 2009-08-15 11:11:16 +0900 | [diff] [blame] | 300 | compute_alias(&boot_cpu_data.icache); |
| 301 | compute_alias(&boot_cpu_data.dcache); |
| 302 | compute_alias(&boot_cpu_data.scache); |
| 303 | |
Paul Mundt | 37443ef | 2009-08-15 12:29:49 +0900 | [diff] [blame] | 304 | __flush_wback_region = noop__flush_region; |
| 305 | __flush_purge_region = noop__flush_region; |
| 306 | __flush_invalidate_region = noop__flush_region; |
| 307 | |
Magnus Damm | 5fb80ae | 2009-10-16 14:38:48 +0900 | [diff] [blame] | 308 | /* |
| 309 | * No flushing is necessary in the disabled cache case so we can |
| 310 | * just keep the noop functions in local_flush_..() and __flush_..() |
| 311 | */ |
| 312 | if (unlikely(cache_disabled)) |
| 313 | goto skip; |
| 314 | |
Rich Felker | 5a846ab | 2016-03-17 23:09:37 +0000 | [diff] [blame] | 315 | if (boot_cpu_data.type == CPU_J2) { |
| 316 | extern void __weak j2_cache_init(void); |
| 317 | |
| 318 | j2_cache_init(); |
| 319 | } else if (boot_cpu_data.family == CPU_FAMILY_SH2) { |
Paul Mundt | 109b44a | 2009-08-15 12:35:15 +0900 | [diff] [blame] | 320 | extern void __weak sh2_cache_init(void); |
| 321 | |
| 322 | sh2_cache_init(); |
| 323 | } |
| 324 | |
Paul Mundt | a58e1a2 | 2009-08-15 12:38:29 +0900 | [diff] [blame] | 325 | if (boot_cpu_data.family == CPU_FAMILY_SH2A) { |
| 326 | extern void __weak sh2a_cache_init(void); |
| 327 | |
| 328 | sh2a_cache_init(); |
| 329 | } |
| 330 | |
Paul Mundt | 79f1c9d | 2009-08-15 12:42:55 +0900 | [diff] [blame] | 331 | if (boot_cpu_data.family == CPU_FAMILY_SH3) { |
| 332 | extern void __weak sh3_cache_init(void); |
| 333 | |
| 334 | sh3_cache_init(); |
Paul Mundt | 0d051d9 | 2009-08-15 12:53:39 +0900 | [diff] [blame] | 335 | |
| 336 | if ((boot_cpu_data.type == CPU_SH7705) && |
| 337 | (boot_cpu_data.dcache.sets == 512)) { |
| 338 | extern void __weak sh7705_cache_init(void); |
| 339 | |
| 340 | sh7705_cache_init(); |
| 341 | } |
Paul Mundt | 79f1c9d | 2009-08-15 12:42:55 +0900 | [diff] [blame] | 342 | } |
| 343 | |
Paul Mundt | ecba106 | 2009-08-15 11:05:42 +0900 | [diff] [blame] | 344 | if ((boot_cpu_data.family == CPU_FAMILY_SH4) || |
| 345 | (boot_cpu_data.family == CPU_FAMILY_SH4A) || |
| 346 | (boot_cpu_data.family == CPU_FAMILY_SH4AL_DSP)) { |
| 347 | extern void __weak sh4_cache_init(void); |
| 348 | |
| 349 | sh4_cache_init(); |
Paul Mundt | 3cf6fa1 | 2010-04-19 17:27:17 +0900 | [diff] [blame] | 350 | |
| 351 | if ((boot_cpu_data.type == CPU_SH7786) || |
| 352 | (boot_cpu_data.type == CPU_SHX3)) { |
| 353 | extern void __weak shx3_cache_init(void); |
| 354 | |
| 355 | shx3_cache_init(); |
| 356 | } |
Paul Mundt | ecba106 | 2009-08-15 11:05:42 +0900 | [diff] [blame] | 357 | } |
Paul Mundt | 27d59ec | 2009-08-15 11:11:16 +0900 | [diff] [blame] | 358 | |
Paul Mundt | 2b43151 | 2009-08-16 02:16:44 +0900 | [diff] [blame] | 359 | if (boot_cpu_data.family == CPU_FAMILY_SH5) { |
| 360 | extern void __weak sh5_cache_init(void); |
| 361 | |
| 362 | sh5_cache_init(); |
| 363 | } |
| 364 | |
Magnus Damm | 5fb80ae | 2009-10-16 14:38:48 +0900 | [diff] [blame] | 365 | skip: |
Paul Mundt | 27d59ec | 2009-08-15 11:11:16 +0900 | [diff] [blame] | 366 | emit_cache_params(); |
Paul Mundt | ecba106 | 2009-08-15 11:05:42 +0900 | [diff] [blame] | 367 | } |