projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * include/asm-sh/cpu-sh3/cacheflush.h | |
| 3 | * | |
| 4 | * Copyright (C) 1999 Niibe Yutaka | |
| 5 | * | |
| 6 | * This file is subject to the terms and conditions of the GNU General Public | |
| 7 | * License. See the file "COPYING" in the main directory of this archive | |
| 8 | * for more details. | |
| 9 | */ | |
| 10 | #ifndef __ASM_CPU_SH3_CACHEFLUSH_H | |
| 11 | #define __ASM_CPU_SH3_CACHEFLUSH_H | |
| 12 | ||
| 26ff6c11 | 13 | /* |
| 1da177e4 LT |
14 | * Cache flushing: |
| 15 | * | |
| 16 | * - flush_cache_all() flushes entire cache | |
| 17 | * - flush_cache_mm(mm) flushes the specified mm context's cache lines | |
| 18 | * - flush_cache_page(mm, vmaddr, pfn) flushes a single page | |
| 19 | * - flush_cache_range(vma, start, end) flushes a range of pages | |
| 20 | * | |
| 21 | * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache | |
| 22 | * - flush_icache_range(start, end) flushes(invalidates) a range for icache | |
| 23 | * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache | |
| 24 | * | |
| 25 | * Caches are indexed (effectively) by physical address on SH-3, so | |
| 26 | * we don't need them. | |
| 27 | */ | |
| 28 | ||
| 29 | #if defined(CONFIG_SH7705_CACHE_32KB) | |
| 30 | ||
| 31 | /* SH7705 is an SH3 processor with 32KB cache. This has alias issues like the | |
| 32 | * SH4. Unlike the SH4 this is a unified cache so we need to do some work | |
| 33 | * in mmap when 'exec'ing a new binary | |
| 34 | */ | |
| 35 | /* 32KB cache, 4kb PAGE sizes need to check bit 12 */ | |
| 36 | #define CACHE_ALIAS 0x00001000 | |
| 37 | ||
| 1da177e4 LT |
38 | extern void flush_cache_all(void); |
| 39 | extern void flush_cache_mm(struct mm_struct *mm); | |
| 40 | extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, | |
| 41 | unsigned long end); | |
| 42 | extern void flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn); | |
| 43 | extern void flush_dcache_page(struct page *pg); | |
| 44 | extern void flush_icache_range(unsigned long start, unsigned long end); | |
| 45 | extern void flush_icache_page(struct vm_area_struct *vma, struct page *page); | |
| 46 | ||
| 47 | #define flush_dcache_mmap_lock(mapping) do { } while (0) | |
| 48 | #define flush_dcache_mmap_unlock(mapping) do { } while (0) | |
| 49 | ||
| 50 | /* SH3 has unified cache so no special action needed here */ | |
| 51 | #define flush_cache_sigtramp(vaddr) do { } while (0) | |
| 52 | #define flush_page_to_ram(page) do { } while (0) | |
| 53 | #define flush_icache_user_range(vma,pg,adr,len) do { } while (0) | |
| 54 | ||
| 55 | #define p3_cache_init() do { } while (0) | |
| 56 | ||
| 57 | #define PG_mapped PG_arch_1 | |
| 58 | ||
| 59 | /* We provide our own get_unmapped_area to avoid cache alias issue */ | |
| 60 | #define HAVE_ARCH_UNMAPPED_AREA | |
| 61 | ||
| 62 | #else | |
| 63 | ||
| 64 | #define flush_cache_all() do { } while (0) | |
| 65 | #define flush_cache_mm(mm) do { } while (0) | |
| 66 | #define flush_cache_range(vma, start, end) do { } while (0) | |
| 67 | #define flush_cache_page(vma, vmaddr, pfn) do { } while (0) | |
| 68 | #define flush_dcache_page(page) do { } while (0) | |
| 69 | #define flush_dcache_mmap_lock(mapping) do { } while (0) | |
| 70 | #define flush_dcache_mmap_unlock(mapping) do { } while (0) | |
| 71 | #define flush_icache_range(start, end) do { } while (0) | |
| 72 | #define flush_icache_page(vma,pg) do { } while (0) | |
| 73 | #define flush_icache_user_range(vma,pg,adr,len) do { } while (0) | |
| 74 | #define flush_cache_sigtramp(vaddr) do { } while (0) | |
| 75 | ||
| 76 | #define p3_cache_init() do { } while (0) | |
| 77 | ||
| 1da177e4 LT |
78 | #endif |
| 79 | ||
| 80 | #endif /* __ASM_CPU_SH3_CACHEFLUSH_H */ | |
| 81 |