1/* 2 * This program is free software; you can redistribute it and/or 3 * modify it under the terms of the GNU General Public License 4 * as published by the Free Software Foundation; either version 5 * 2 of the License, or (at your option) any later version. 6 */ 7#ifndef _ASM_POWERPC_CACHEFLUSH_H 8#define _ASM_POWERPC_CACHEFLUSH_H 9 10#ifdef __KERNEL__ 11 12#include <linux/mm.h> 13#include <asm/cputable.h> 14 15/* 16 * No cache flushing is required when address mappings are changed, 17 * because the caches on PowerPCs are physically addressed. 18 */ 19#define flush_cache_all() do { } while (0) 20#define flush_cache_mm(mm) do { } while (0) 21#define flush_cache_dup_mm(mm) do { } while (0) 22#define flush_cache_range(vma, start, end) do { } while (0) 23#define flush_cache_page(vma, vmaddr, pfn) do { } while (0) 24#define flush_icache_page(vma, page) do { } while (0) 25#define flush_cache_vmap(start, end) do { } while (0) 26#define flush_cache_vunmap(start, end) do { } while (0) 27 28extern void flush_dcache_page(struct page *page); 29#define flush_dcache_mmap_lock(mapping) do { } while (0) 30#define flush_dcache_mmap_unlock(mapping) do { } while (0) 31 32extern void __flush_icache_range(unsigned long, unsigned long); 33static inline void flush_icache_range(unsigned long start, unsigned long stop) 34{ 35 if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) 36 __flush_icache_range(start, stop); 37} 38 39extern void flush_icache_user_range(struct vm_area_struct *vma, 40 struct page *page, unsigned long addr, 41 int len); 42extern void __flush_dcache_icache(void *page_va); 43extern void flush_dcache_icache_page(struct page *page); 44#if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE) 45extern void __flush_dcache_icache_phys(unsigned long physaddr); 46#endif /* CONFIG_PPC32 && !CONFIG_BOOKE */ 47 48extern void flush_dcache_range(unsigned long start, unsigned long stop); 49#ifdef CONFIG_PPC32 50extern void clean_dcache_range(unsigned long start, unsigned long stop); 51extern void invalidate_dcache_range(unsigned long start, unsigned long stop); 52#endif /* CONFIG_PPC32 */ 53#ifdef CONFIG_PPC64 54extern void flush_inval_dcache_range(unsigned long start, unsigned long stop); 55extern void flush_dcache_phys_range(unsigned long start, unsigned long stop); 56#endif 57 58#define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 59 do { \ 60 memcpy(dst, src, len); \ 61 flush_icache_user_range(vma, page, vaddr, len); \ 62 } while (0) 63#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 64 memcpy(dst, src, len) 65 66 67 68#ifdef CONFIG_DEBUG_PAGEALLOC 69/* internal debugging function */ 70void kernel_map_pages(struct page *page, int numpages, int enable); 71#endif 72 73#endif /* __KERNEL__ */ 74 75#endif /* _ASM_POWERPC_CACHEFLUSH_H */ 76