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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | /* cacheflush.h: FRV cache flushing routines * * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _ASM_CACHEFLUSH_H #define _ASM_CACHEFLUSH_H /* Keep includes the same across arches. */ #include <linux/mm.h> /* * virtually-indexed cache management (our cache is physically indexed) */ #define flush_cache_all() do {} while(0) #define flush_cache_mm(mm) do {} while(0) #define flush_cache_dup_mm(mm) do {} while(0) #define flush_cache_range(mm, start, end) do {} while(0) #define flush_cache_page(vma, vmaddr, pfn) do {} while(0) #define flush_cache_vmap(start, end) do {} while(0) #define flush_cache_vunmap(start, end) do {} while(0) #define flush_dcache_mmap_lock(mapping) do {} while(0) #define flush_dcache_mmap_unlock(mapping) do {} while(0) /* * physically-indexed cache management * - see arch/frv/lib/cache.S */ extern void frv_dcache_writeback(unsigned long start, unsigned long size); extern void frv_cache_invalidate(unsigned long start, unsigned long size); extern void frv_icache_invalidate(unsigned long start, unsigned long size); extern void frv_cache_wback_inv(unsigned long start, unsigned long size); static inline void __flush_cache_all(void) { asm volatile(" dcef @(gr0,gr0),#1 \n" " icei @(gr0,gr0),#1 \n" " membar \n" : : : "memory" ); } /* dcache/icache coherency... */ #ifdef CONFIG_MMU extern void flush_dcache_page(struct page *page); #else static inline void flush_dcache_page(struct page *page) { unsigned long addr = page_to_phys(page); frv_dcache_writeback(addr, addr + PAGE_SIZE); } #endif static inline void flush_page_to_ram(struct page *page) { flush_dcache_page(page); } static inline void flush_icache(void) { __flush_cache_all(); } static inline void flush_icache_range(unsigned long start, unsigned long end) { frv_cache_wback_inv(start, end); } #ifdef CONFIG_MMU extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, unsigned long start, unsigned long len); #else static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, unsigned long start, unsigned long len) { frv_cache_wback_inv(start, start + len); } #endif static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page) { flush_icache_user_range(vma, page, page_to_phys(page), PAGE_SIZE); } /* * permit ptrace to access another process's address space through the icache * and the dcache */ #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ do { \ memcpy((dst), (src), (len)); \ flush_icache_user_range((vma), (page), (vaddr), (len)); \ } while(0) #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ memcpy((dst), (src), (len)) #endif /* _ASM_CACHEFLUSH_H */ |