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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-mips/cacheflush.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-mips/cacheflush.h')
-rw-r--r-- | include/asm-mips/cacheflush.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/include/asm-mips/cacheflush.h b/include/asm-mips/cacheflush.h new file mode 100644 index 0000000..635f1bf --- /dev/null +++ b/include/asm-mips/cacheflush.h @@ -0,0 +1,81 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle + * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. + */ +#ifndef _ASM_CACHEFLUSH_H +#define _ASM_CACHEFLUSH_H + +/* Keep includes the same across arches. */ +#include <linux/mm.h> +#include <asm/cpu-features.h> + +/* Cache flushing: + * + * - flush_cache_all() flushes entire cache + * - flush_cache_mm(mm) flushes the specified mm context's cache lines + * - flush_cache_page(mm, vmaddr, pfn) flushes a single page + * - flush_cache_range(vma, start, end) flushes a range of pages + * - flush_icache_range(start, end) flush a range of instructions + * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache + * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache + * + * MIPS specific flush operations: + * + * - flush_cache_sigtramp() flush signal trampoline + * - flush_icache_all() flush the entire instruction cache + * - flush_data_cache_page() flushes a page from the data cache + */ +extern void (*flush_cache_all)(void); +extern void (*__flush_cache_all)(void); +extern void (*flush_cache_mm)(struct mm_struct *mm); +extern void (*flush_cache_range)(struct vm_area_struct *vma, + unsigned long start, unsigned long end); +extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn); +extern void __flush_dcache_page(struct page *page); + +static inline void flush_dcache_page(struct page *page) +{ + if (cpu_has_dc_aliases) + __flush_dcache_page(page); + +} + +#define flush_dcache_mmap_lock(mapping) do { } while (0) +#define flush_dcache_mmap_unlock(mapping) do { } while (0) + +extern void (*flush_icache_page)(struct vm_area_struct *vma, + struct page *page); +extern void (*flush_icache_range)(unsigned long start, unsigned long end); +#define flush_cache_vmap(start, end) flush_cache_all() +#define flush_cache_vunmap(start, end) flush_cache_all() + +#define copy_to_user_page(vma, page, vaddr, dst, src, len) \ +do { \ + memcpy(dst, (void *) src, len); \ + flush_icache_page(vma, page); \ +} while (0) +#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ + memcpy(dst, src, len) + +extern void (*flush_cache_sigtramp)(unsigned long addr); +extern void (*flush_icache_all)(void); +extern void (*flush_data_cache_page)(unsigned long addr); + +/* + * This flag is used to indicate that the page pointed to by a pte + * is dirty and requires cleaning before returning it to the user. + */ +#define PG_dcache_dirty PG_arch_1 + +#define Page_dcache_dirty(page) \ + test_bit(PG_dcache_dirty, &(page)->flags) +#define SetPageDcacheDirty(page) \ + set_bit(PG_dcache_dirty, &(page)->flags) +#define ClearPageDcacheDirty(page) \ + clear_bit(PG_dcache_dirty, &(page)->flags) + +#endif /* _ASM_CACHEFLUSH_H */ |