cacheflush.h

来自「Linux Kernel 2.6.9 for OMAP1710」· C头文件 代码 · 共 50 行

/*
 * include/asm-ppc/cacheflush.h
 *
 *  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.
 */
#ifdef __KERNEL__
#ifndef _PPC_CACHEFLUSH_H
#define _PPC_CACHEFLUSH_H

#include <linux/mm.h>

/*
 * No cache flushing is required when address mappings are
 * changed, because the caches on PowerPCs are physically
 * addressed.  -- paulus
 * Also, when SMP we use the coherency (M) bit of the
 * BATs and PTEs.  -- Cort
 */
#define flush_cache_all()		do { } while (0)
#define flush_cache_mm(mm)		do { } while (0)
#define flush_cache_range(vma, a, b)	do { } while (0)
#define flush_cache_page(vma, p)	do { } while (0)
#define flush_icache_page(vma, page)	do { } while (0)
#define flush_cache_vmap(start, end)	do { } while (0)
#define flush_cache_vunmap(start, end)	do { } while (0)

extern void flush_dcache_page(struct page *page);
#define flush_dcache_mmap_lock(mapping)		do { } while (0)
#define flush_dcache_mmap_unlock(mapping)	do { } while (0)

extern void flush_icache_range(unsigned long, unsigned long);
extern void flush_icache_user_range(struct vm_area_struct *vma,
		struct page *page, unsigned long addr, int len);

#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)

extern void __flush_dcache_icache(void *page_va);
extern void __flush_dcache_icache_phys(unsigned long physaddr);
extern void flush_dcache_icache_page(struct page *page);
#endif /* _PPC_CACHEFLUSH_H */
#endif /* __KERNEL__ */