Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/asm-ppc/cacheflush.h |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | */ |
| 9 | #ifdef __KERNEL__ |
| 10 | #ifndef _PPC_CACHEFLUSH_H |
| 11 | #define _PPC_CACHEFLUSH_H |
| 12 | |
| 13 | #include <linux/mm.h> |
| 14 | |
| 15 | /* |
| 16 | * No cache flushing is required when address mappings are |
| 17 | * changed, because the caches on PowerPCs are physically |
| 18 | * addressed. -- paulus |
| 19 | * Also, when SMP we use the coherency (M) bit of the |
| 20 | * BATs and PTEs. -- Cort |
| 21 | */ |
| 22 | #define flush_cache_all() do { } while (0) |
| 23 | #define flush_cache_mm(mm) do { } while (0) |
| 24 | #define flush_cache_range(vma, a, b) do { } while (0) |
| 25 | #define flush_cache_page(vma, p, pfn) do { } while (0) |
| 26 | #define flush_icache_page(vma, page) do { } while (0) |
| 27 | #define flush_cache_vmap(start, end) do { } while (0) |
| 28 | #define flush_cache_vunmap(start, end) do { } while (0) |
| 29 | |
| 30 | extern void flush_dcache_page(struct page *page); |
| 31 | #define flush_dcache_mmap_lock(mapping) do { } while (0) |
| 32 | #define flush_dcache_mmap_unlock(mapping) do { } while (0) |
| 33 | |
| 34 | extern void flush_icache_range(unsigned long, unsigned long); |
| 35 | extern void flush_icache_user_range(struct vm_area_struct *vma, |
| 36 | struct page *page, unsigned long addr, int len); |
| 37 | |
| 38 | #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ |
| 39 | do { memcpy(dst, src, len); \ |
| 40 | flush_icache_user_range(vma, page, vaddr, len); \ |
| 41 | } while (0) |
| 42 | #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ |
| 43 | memcpy(dst, src, len) |
| 44 | |
| 45 | extern void __flush_dcache_icache(void *page_va); |
| 46 | extern void __flush_dcache_icache_phys(unsigned long physaddr); |
| 47 | extern void flush_dcache_icache_page(struct page *page); |
| 48 | #endif /* _PPC_CACHEFLUSH_H */ |
| 49 | #endif /* __KERNEL__ */ |