| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* cacheflush.h: FRV cache flushing routines |
| 2 | * |
| 3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #ifndef _ASM_CACHEFLUSH_H |
| 13 | #define _ASM_CACHEFLUSH_H |
| 14 | |
| 15 | /* Keep includes the same across arches. */ |
| 16 | #include <linux/mm.h> |
| 17 | |
| 18 | /* |
| 19 | * virtually-indexed cache management (our cache is physically indexed) |
| 20 | */ |
| 21 | #define flush_cache_all() do {} while(0) |
| 22 | #define flush_cache_mm(mm) do {} while(0) |
| 23 | #define flush_cache_range(mm, start, end) do {} while(0) |
| 24 | #define flush_cache_page(vma, vmaddr, pfn) do {} while(0) |
| 25 | #define flush_cache_vmap(start, end) do {} while(0) |
| 26 | #define flush_cache_vunmap(start, end) do {} while(0) |
| 27 | #define flush_dcache_mmap_lock(mapping) do {} while(0) |
| 28 | #define flush_dcache_mmap_unlock(mapping) do {} while(0) |
| 29 | |
| 30 | /* |
| 31 | * physically-indexed cache managment |
| 32 | * - see arch/frv/lib/cache.S |
| 33 | */ |
| 34 | extern void frv_dcache_writeback(unsigned long start, unsigned long size); |
| 35 | extern void frv_cache_invalidate(unsigned long start, unsigned long size); |
| 36 | extern void frv_icache_invalidate(unsigned long start, unsigned long size); |
| 37 | extern void frv_cache_wback_inv(unsigned long start, unsigned long size); |
| 38 | |
| 39 | static inline void __flush_cache_all(void) |
| 40 | { |
| 41 | asm volatile(" dcef @(gr0,gr0),#1 \n" |
| 42 | " icei @(gr0,gr0),#1 \n" |
| 43 | " membar \n" |
| 44 | : : : "memory" |
| 45 | ); |
| 46 | } |
| 47 | |
| 48 | /* dcache/icache coherency... */ |
| 49 | #ifdef CONFIG_MMU |
| 50 | extern void flush_dcache_page(struct page *page); |
| 51 | #else |
| 52 | static inline void flush_dcache_page(struct page *page) |
| 53 | { |
| 54 | unsigned long addr = page_to_phys(page); |
| 55 | frv_dcache_writeback(addr, addr + PAGE_SIZE); |
| 56 | } |
| 57 | #endif |
| 58 | |
| 59 | static inline void flush_page_to_ram(struct page *page) |
| 60 | { |
| 61 | flush_dcache_page(page); |
| 62 | } |
| 63 | |
| 64 | static inline void flush_icache(void) |
| 65 | { |
| 66 | __flush_cache_all(); |
| 67 | } |
| 68 | |
| 69 | static inline void flush_icache_range(unsigned long start, unsigned long end) |
| 70 | { |
| 71 | frv_cache_wback_inv(start, end); |
| 72 | } |
| 73 | |
| 74 | #ifdef CONFIG_MMU |
| 75 | extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, |
| 76 | unsigned long start, unsigned long len); |
| 77 | #else |
| 78 | static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, |
| 79 | unsigned long start, unsigned long len) |
| 80 | { |
| 81 | frv_cache_wback_inv(start, start + len); |
| 82 | } |
| 83 | #endif |
| 84 | |
| 85 | static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page) |
| 86 | { |
| 87 | flush_icache_user_range(vma, page, page_to_phys(page), PAGE_SIZE); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | #endif /* _ASM_CACHEFLUSH_H */ |