/* 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_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 managment * - 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); } #endif /* _ASM_CACHEFLUSH_H */