Commit | Line | Data |
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1da177e4 | 1 | /* |
4baa9922 | 2 | * arch/arm/include/asm/cacheflush.h |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 1999-2002 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #ifndef _ASMARM_CACHEFLUSH_H | |
11 | #define _ASMARM_CACHEFLUSH_H | |
12 | ||
1da177e4 LT |
13 | #include <linux/mm.h> |
14 | ||
1da177e4 | 15 | #include <asm/glue.h> |
b8a9b66f | 16 | #include <asm/shmparam.h> |
376e1421 | 17 | #include <asm/cachetype.h> |
b8a9b66f RK |
18 | |
19 | #define CACHE_COLOUR(vaddr) ((vaddr & (SHMLBA - 1)) >> PAGE_SHIFT) | |
1da177e4 LT |
20 | |
21 | /* | |
22 | * Cache Model | |
23 | * =========== | |
24 | */ | |
25 | #undef _CACHE | |
26 | #undef MULTI_CACHE | |
27 | ||
6cc7cbef | 28 | #if defined(CONFIG_CPU_CACHE_V3) |
1da177e4 LT |
29 | # ifdef _CACHE |
30 | # define MULTI_CACHE 1 | |
31 | # else | |
32 | # define _CACHE v3 | |
33 | # endif | |
34 | #endif | |
35 | ||
6cc7cbef | 36 | #if defined(CONFIG_CPU_CACHE_V4) |
1da177e4 LT |
37 | # ifdef _CACHE |
38 | # define MULTI_CACHE 1 | |
39 | # else | |
40 | # define _CACHE v4 | |
41 | # endif | |
42 | #endif | |
43 | ||
44 | #if defined(CONFIG_CPU_ARM920T) || defined(CONFIG_CPU_ARM922T) || \ | |
45 | defined(CONFIG_CPU_ARM925T) || defined(CONFIG_CPU_ARM1020) | |
46 | # define MULTI_CACHE 1 | |
47 | #endif | |
48 | ||
49 | #if defined(CONFIG_CPU_ARM926T) | |
50 | # ifdef _CACHE | |
51 | # define MULTI_CACHE 1 | |
52 | # else | |
53 | # define _CACHE arm926 | |
54 | # endif | |
55 | #endif | |
56 | ||
d60674eb HC |
57 | #if defined(CONFIG_CPU_ARM940T) |
58 | # ifdef _CACHE | |
59 | # define MULTI_CACHE 1 | |
60 | # else | |
61 | # define _CACHE arm940 | |
62 | # endif | |
63 | #endif | |
64 | ||
f37f46eb HC |
65 | #if defined(CONFIG_CPU_ARM946E) |
66 | # ifdef _CACHE | |
67 | # define MULTI_CACHE 1 | |
68 | # else | |
69 | # define _CACHE arm946 | |
70 | # endif | |
71 | #endif | |
72 | ||
6cc7cbef | 73 | #if defined(CONFIG_CPU_CACHE_V4WB) |
1da177e4 LT |
74 | # ifdef _CACHE |
75 | # define MULTI_CACHE 1 | |
76 | # else | |
77 | # define _CACHE v4wb | |
78 | # endif | |
79 | #endif | |
80 | ||
81 | #if defined(CONFIG_CPU_XSCALE) | |
82 | # ifdef _CACHE | |
83 | # define MULTI_CACHE 1 | |
84 | # else | |
85 | # define _CACHE xscale | |
86 | # endif | |
87 | #endif | |
88 | ||
23bdf86a LB |
89 | #if defined(CONFIG_CPU_XSC3) |
90 | # ifdef _CACHE | |
91 | # define MULTI_CACHE 1 | |
92 | # else | |
93 | # define _CACHE xsc3 | |
94 | # endif | |
95 | #endif | |
96 | ||
49cbe786 EM |
97 | #if defined(CONFIG_CPU_MOHAWK) |
98 | # ifdef _CACHE | |
99 | # define MULTI_CACHE 1 | |
100 | # else | |
101 | # define _CACHE mohawk | |
102 | # endif | |
103 | #endif | |
104 | ||
e50d6409 | 105 | #if defined(CONFIG_CPU_FEROCEON) |
836a8051 | 106 | # define MULTI_CACHE 1 |
e50d6409 AH |
107 | #endif |
108 | ||
1da177e4 LT |
109 | #if defined(CONFIG_CPU_V6) |
110 | //# ifdef _CACHE | |
111 | # define MULTI_CACHE 1 | |
112 | //# else | |
113 | //# define _CACHE v6 | |
114 | //# endif | |
115 | #endif | |
116 | ||
bbe88886 CM |
117 | #if defined(CONFIG_CPU_V7) |
118 | //# ifdef _CACHE | |
119 | # define MULTI_CACHE 1 | |
120 | //# else | |
121 | //# define _CACHE v7 | |
122 | //# endif | |
123 | #endif | |
124 | ||
1da177e4 LT |
125 | #if !defined(_CACHE) && !defined(MULTI_CACHE) |
126 | #error Unknown cache maintainence model | |
127 | #endif | |
128 | ||
129 | /* | |
130 | * This flag is used to indicate that the page pointed to by a pte | |
131 | * is dirty and requires cleaning before returning it to the user. | |
132 | */ | |
133 | #define PG_dcache_dirty PG_arch_1 | |
134 | ||
135 | /* | |
136 | * MM Cache Management | |
137 | * =================== | |
138 | * | |
139 | * The arch/arm/mm/cache-*.S and arch/arm/mm/proc-*.S files | |
140 | * implement these methods. | |
141 | * | |
142 | * Start addresses are inclusive and end addresses are exclusive; | |
143 | * start addresses should be rounded down, end addresses up. | |
144 | * | |
145 | * See Documentation/cachetlb.txt for more information. | |
146 | * Please note that the implementation of these, and the required | |
147 | * effects are cache-type (VIVT/VIPT/PIPT) specific. | |
148 | * | |
149 | * flush_cache_kern_all() | |
150 | * | |
151 | * Unconditionally clean and invalidate the entire cache. | |
152 | * | |
153 | * flush_cache_user_mm(mm) | |
154 | * | |
155 | * Clean and invalidate all user space cache entries | |
156 | * before a change of page tables. | |
157 | * | |
158 | * flush_cache_user_range(start, end, flags) | |
159 | * | |
160 | * Clean and invalidate a range of cache entries in the | |
161 | * specified address space before a change of page tables. | |
162 | * - start - user start address (inclusive, page aligned) | |
163 | * - end - user end address (exclusive, page aligned) | |
164 | * - flags - vma->vm_flags field | |
165 | * | |
166 | * coherent_kern_range(start, end) | |
167 | * | |
168 | * Ensure coherency between the Icache and the Dcache in the | |
169 | * region described by start, end. If you have non-snooping | |
170 | * Harvard caches, you need to implement this function. | |
171 | * - start - virtual start address | |
172 | * - end - virtual end address | |
173 | * | |
174 | * DMA Cache Coherency | |
175 | * =================== | |
176 | * | |
177 | * dma_inv_range(start, end) | |
178 | * | |
179 | * Invalidate (discard) the specified virtual address range. | |
180 | * May not write back any entries. If 'start' or 'end' | |
181 | * are not cache line aligned, those lines must be written | |
182 | * back. | |
183 | * - start - virtual start address | |
184 | * - end - virtual end address | |
185 | * | |
186 | * dma_clean_range(start, end) | |
187 | * | |
188 | * Clean (write back) the specified virtual address range. | |
189 | * - start - virtual start address | |
190 | * - end - virtual end address | |
191 | * | |
192 | * dma_flush_range(start, end) | |
193 | * | |
194 | * Clean and invalidate the specified virtual address range. | |
195 | * - start - virtual start address | |
196 | * - end - virtual end address | |
197 | */ | |
198 | ||
199 | struct cpu_cache_fns { | |
200 | void (*flush_kern_all)(void); | |
201 | void (*flush_user_all)(void); | |
202 | void (*flush_user_range)(unsigned long, unsigned long, unsigned int); | |
203 | ||
204 | void (*coherent_kern_range)(unsigned long, unsigned long); | |
205 | void (*coherent_user_range)(unsigned long, unsigned long); | |
206 | void (*flush_kern_dcache_page)(void *); | |
207 | ||
7ae5a761 RK |
208 | void (*dma_inv_range)(const void *, const void *); |
209 | void (*dma_clean_range)(const void *, const void *); | |
210 | void (*dma_flush_range)(const void *, const void *); | |
1da177e4 LT |
211 | }; |
212 | ||
953233dc CM |
213 | struct outer_cache_fns { |
214 | void (*inv_range)(unsigned long, unsigned long); | |
215 | void (*clean_range)(unsigned long, unsigned long); | |
216 | void (*flush_range)(unsigned long, unsigned long); | |
217 | }; | |
218 | ||
1da177e4 LT |
219 | /* |
220 | * Select the calling method | |
221 | */ | |
222 | #ifdef MULTI_CACHE | |
223 | ||
224 | extern struct cpu_cache_fns cpu_cache; | |
225 | ||
226 | #define __cpuc_flush_kern_all cpu_cache.flush_kern_all | |
227 | #define __cpuc_flush_user_all cpu_cache.flush_user_all | |
228 | #define __cpuc_flush_user_range cpu_cache.flush_user_range | |
229 | #define __cpuc_coherent_kern_range cpu_cache.coherent_kern_range | |
230 | #define __cpuc_coherent_user_range cpu_cache.coherent_user_range | |
231 | #define __cpuc_flush_dcache_page cpu_cache.flush_kern_dcache_page | |
232 | ||
233 | /* | |
234 | * These are private to the dma-mapping API. Do not use directly. | |
235 | * Their sole purpose is to ensure that data held in the cache | |
236 | * is visible to DMA, or data written by DMA to system memory is | |
237 | * visible to the CPU. | |
238 | */ | |
239 | #define dmac_inv_range cpu_cache.dma_inv_range | |
240 | #define dmac_clean_range cpu_cache.dma_clean_range | |
241 | #define dmac_flush_range cpu_cache.dma_flush_range | |
242 | ||
243 | #else | |
244 | ||
245 | #define __cpuc_flush_kern_all __glue(_CACHE,_flush_kern_cache_all) | |
246 | #define __cpuc_flush_user_all __glue(_CACHE,_flush_user_cache_all) | |
247 | #define __cpuc_flush_user_range __glue(_CACHE,_flush_user_cache_range) | |
248 | #define __cpuc_coherent_kern_range __glue(_CACHE,_coherent_kern_range) | |
249 | #define __cpuc_coherent_user_range __glue(_CACHE,_coherent_user_range) | |
250 | #define __cpuc_flush_dcache_page __glue(_CACHE,_flush_kern_dcache_page) | |
251 | ||
252 | extern void __cpuc_flush_kern_all(void); | |
253 | extern void __cpuc_flush_user_all(void); | |
254 | extern void __cpuc_flush_user_range(unsigned long, unsigned long, unsigned int); | |
255 | extern void __cpuc_coherent_kern_range(unsigned long, unsigned long); | |
256 | extern void __cpuc_coherent_user_range(unsigned long, unsigned long); | |
257 | extern void __cpuc_flush_dcache_page(void *); | |
258 | ||
259 | /* | |
260 | * These are private to the dma-mapping API. Do not use directly. | |
261 | * Their sole purpose is to ensure that data held in the cache | |
262 | * is visible to DMA, or data written by DMA to system memory is | |
263 | * visible to the CPU. | |
264 | */ | |
265 | #define dmac_inv_range __glue(_CACHE,_dma_inv_range) | |
266 | #define dmac_clean_range __glue(_CACHE,_dma_clean_range) | |
267 | #define dmac_flush_range __glue(_CACHE,_dma_flush_range) | |
268 | ||
7ae5a761 RK |
269 | extern void dmac_inv_range(const void *, const void *); |
270 | extern void dmac_clean_range(const void *, const void *); | |
271 | extern void dmac_flush_range(const void *, const void *); | |
1da177e4 LT |
272 | |
273 | #endif | |
274 | ||
953233dc CM |
275 | #ifdef CONFIG_OUTER_CACHE |
276 | ||
277 | extern struct outer_cache_fns outer_cache; | |
278 | ||
279 | static inline void outer_inv_range(unsigned long start, unsigned long end) | |
280 | { | |
281 | if (outer_cache.inv_range) | |
282 | outer_cache.inv_range(start, end); | |
283 | } | |
284 | static inline void outer_clean_range(unsigned long start, unsigned long end) | |
285 | { | |
286 | if (outer_cache.clean_range) | |
287 | outer_cache.clean_range(start, end); | |
288 | } | |
289 | static inline void outer_flush_range(unsigned long start, unsigned long end) | |
290 | { | |
291 | if (outer_cache.flush_range) | |
292 | outer_cache.flush_range(start, end); | |
293 | } | |
294 | ||
295 | #else | |
296 | ||
297 | static inline void outer_inv_range(unsigned long start, unsigned long end) | |
298 | { } | |
299 | static inline void outer_clean_range(unsigned long start, unsigned long end) | |
300 | { } | |
301 | static inline void outer_flush_range(unsigned long start, unsigned long end) | |
302 | { } | |
303 | ||
304 | #endif | |
305 | ||
1da177e4 LT |
306 | /* |
307 | * Copy user data from/to a page which is mapped into a different | |
308 | * processes address space. Really, we want to allow our "user | |
309 | * space" model to handle this. | |
310 | */ | |
311 | #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ | |
312 | do { \ | |
1da177e4 | 313 | memcpy(dst, src, len); \ |
a188ad2b | 314 | flush_ptrace_access(vma, page, vaddr, dst, len, 1);\ |
1da177e4 LT |
315 | } while (0) |
316 | ||
317 | #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ | |
318 | do { \ | |
1da177e4 LT |
319 | memcpy(dst, src, len); \ |
320 | } while (0) | |
321 | ||
322 | /* | |
323 | * Convert calls to our calling convention. | |
324 | */ | |
325 | #define flush_cache_all() __cpuc_flush_kern_all() | |
d7b6b358 | 326 | #ifndef CONFIG_CPU_CACHE_VIPT |
1da177e4 LT |
327 | static inline void flush_cache_mm(struct mm_struct *mm) |
328 | { | |
329 | if (cpu_isset(smp_processor_id(), mm->cpu_vm_mask)) | |
330 | __cpuc_flush_user_all(); | |
331 | } | |
332 | ||
333 | static inline void | |
334 | flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) | |
335 | { | |
336 | if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) | |
337 | __cpuc_flush_user_range(start & PAGE_MASK, PAGE_ALIGN(end), | |
338 | vma->vm_flags); | |
339 | } | |
340 | ||
341 | static inline void | |
342 | flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn) | |
343 | { | |
344 | if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) { | |
345 | unsigned long addr = user_addr & PAGE_MASK; | |
346 | __cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags); | |
347 | } | |
348 | } | |
a188ad2b GD |
349 | |
350 | static inline void | |
351 | flush_ptrace_access(struct vm_area_struct *vma, struct page *page, | |
352 | unsigned long uaddr, void *kaddr, | |
353 | unsigned long len, int write) | |
354 | { | |
355 | if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) { | |
356 | unsigned long addr = (unsigned long)kaddr; | |
357 | __cpuc_coherent_kern_range(addr, addr + len); | |
358 | } | |
359 | } | |
d7b6b358 RK |
360 | #else |
361 | extern void flush_cache_mm(struct mm_struct *mm); | |
362 | extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end); | |
363 | extern void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn); | |
a188ad2b GD |
364 | extern void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, |
365 | unsigned long uaddr, void *kaddr, | |
366 | unsigned long len, int write); | |
d7b6b358 | 367 | #endif |
1da177e4 | 368 | |
ec8c0446 RB |
369 | #define flush_cache_dup_mm(mm) flush_cache_mm(mm) |
370 | ||
1da177e4 LT |
371 | /* |
372 | * flush_cache_user_range is used when we want to ensure that the | |
373 | * Harvard caches are synchronised for the user space address range. | |
374 | * This is used for the ARM private sys_cacheflush system call. | |
375 | */ | |
376 | #define flush_cache_user_range(vma,start,end) \ | |
377 | __cpuc_coherent_user_range((start) & PAGE_MASK, PAGE_ALIGN(end)) | |
378 | ||
379 | /* | |
380 | * Perform necessary cache operations to ensure that data previously | |
381 | * stored within this range of addresses can be executed by the CPU. | |
382 | */ | |
383 | #define flush_icache_range(s,e) __cpuc_coherent_kern_range(s,e) | |
384 | ||
385 | /* | |
386 | * Perform necessary cache operations to ensure that the TLB will | |
387 | * see data written in the specified area. | |
388 | */ | |
389 | #define clean_dcache_area(start,size) cpu_dcache_clean_area(start, size) | |
390 | ||
391 | /* | |
392 | * flush_dcache_page is used when the kernel has written to the page | |
393 | * cache page at virtual address page->virtual. | |
394 | * | |
395 | * If this page isn't mapped (ie, page_mapping == NULL), or it might | |
396 | * have userspace mappings, then we _must_ always clean + invalidate | |
397 | * the dcache entries associated with the kernel mapping. | |
398 | * | |
399 | * Otherwise we can defer the operation, and clean the cache when we are | |
400 | * about to change to user space. This is the same method as used on SPARC64. | |
401 | * See update_mmu_cache for the user space part. | |
402 | */ | |
403 | extern void flush_dcache_page(struct page *); | |
404 | ||
1c9d3df5 RP |
405 | extern void __flush_dcache_page(struct address_space *mapping, struct page *page); |
406 | ||
826cbdaf CM |
407 | static inline void __flush_icache_all(void) |
408 | { | |
409 | asm("mcr p15, 0, %0, c7, c5, 0 @ invalidate I-cache\n" | |
410 | : | |
411 | : "r" (0)); | |
412 | } | |
413 | ||
6020dff0 RK |
414 | #define ARCH_HAS_FLUSH_ANON_PAGE |
415 | static inline void flush_anon_page(struct vm_area_struct *vma, | |
416 | struct page *page, unsigned long vmaddr) | |
417 | { | |
418 | extern void __flush_anon_page(struct vm_area_struct *vma, | |
419 | struct page *, unsigned long); | |
420 | if (PageAnon(page)) | |
421 | __flush_anon_page(vma, page, vmaddr); | |
422 | } | |
423 | ||
1da177e4 | 424 | #define flush_dcache_mmap_lock(mapping) \ |
19fd6231 | 425 | spin_lock_irq(&(mapping)->tree_lock) |
1da177e4 | 426 | #define flush_dcache_mmap_unlock(mapping) \ |
19fd6231 | 427 | spin_unlock_irq(&(mapping)->tree_lock) |
1da177e4 LT |
428 | |
429 | #define flush_icache_user_range(vma,page,addr,len) \ | |
430 | flush_dcache_page(page) | |
431 | ||
432 | /* | |
433 | * We don't appear to need to do anything here. In fact, if we did, we'd | |
434 | * duplicate cache flushing elsewhere performed by flush_dcache_page(). | |
435 | */ | |
436 | #define flush_icache_page(vma,page) do { } while (0) | |
437 | ||
90833fda JH |
438 | static inline void flush_ioremap_region(unsigned long phys, void __iomem *virt, |
439 | unsigned offset, size_t size) | |
440 | { | |
441 | const void *start = (void __force *)virt + offset; | |
442 | dmac_inv_range(start, start + size); | |
443 | } | |
444 | ||
376e1421 CM |
445 | /* |
446 | * flush_cache_vmap() is used when creating mappings (eg, via vmap, | |
447 | * vmalloc, ioremap etc) in kernel space for pages. On non-VIPT | |
448 | * caches, since the direct-mappings of these pages may contain cached | |
449 | * data, we need to do a full cache flush to ensure that writebacks | |
450 | * don't corrupt data placed into these pages via the new mappings. | |
451 | */ | |
452 | static inline void flush_cache_vmap(unsigned long start, unsigned long end) | |
453 | { | |
454 | if (!cache_is_vipt_nonaliasing()) | |
455 | flush_cache_all(); | |
456 | else | |
457 | /* | |
458 | * set_pte_at() called from vmap_pte_range() does not | |
459 | * have a DSB after cleaning the cache line. | |
460 | */ | |
461 | dsb(); | |
462 | } | |
463 | ||
464 | static inline void flush_cache_vunmap(unsigned long start, unsigned long end) | |
465 | { | |
466 | if (!cache_is_vipt_nonaliasing()) | |
467 | flush_cache_all(); | |
468 | } | |
469 | ||
1da177e4 | 470 | #endif |