1 /* cacheflush.h: FRV cache flushing routines
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
12 #ifndef _ASM_CACHEFLUSH_H
13 #define _ASM_CACHEFLUSH_H
15 /* Keep includes the same across arches. */
19 * virtually-indexed cache management (our cache is physically indexed)
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)
31 * physically-indexed cache managment
32 * - see arch/frv/lib/cache.S
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);
39 static inline void __flush_cache_all(void)
41 asm volatile(" dcef @(gr0,gr0),#1 \n"
42 " icei @(gr0,gr0),#1 \n"
48 /* dcache/icache coherency... */
50 extern void flush_dcache_page(struct page *page);
52 static inline void flush_dcache_page(struct page *page)
54 unsigned long addr = page_to_phys(page);
55 frv_dcache_writeback(addr, addr + PAGE_SIZE);
59 static inline void flush_page_to_ram(struct page *page)
61 flush_dcache_page(page);
64 static inline void flush_icache(void)
69 static inline void flush_icache_range(unsigned long start, unsigned long end)
71 frv_cache_wback_inv(start, end);
75 extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
76 unsigned long start, unsigned long len);
78 static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
79 unsigned long start, unsigned long len)
81 frv_cache_wback_inv(start, start + len);
85 static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page)
87 flush_icache_user_range(vma, page, page_to_phys(page), PAGE_SIZE);
91 * permit ptrace to access another process's address space through the icache
94 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
96 memcpy((dst), (src), (len)); \
97 flush_icache_user_range((vma), (page), (vaddr), (len)); \
100 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
101 memcpy((dst), (src), (len))
103 #endif /* _ASM_CACHEFLUSH_H */