sh: Lazy dcache writeback optimizations.

[mirror_ubuntu-bionic-kernel.git] / include / asm-sh / cacheflush.h

#ifndef __ASM_SH_CACHEFLUSH_H
#define __ASM_SH_CACHEFLUSH_H
#ifdef __KERNEL__

#include <linux/mm.h>
#include <asm/cpu/cacheflush.h>

/* Flush (write-back only) a region (smaller than a page) */
extern void __flush_wback_region(void *start, int size);
/* Flush (write-back & invalidate) a region (smaller than a page) */
extern void __flush_purge_region(void *start, int size);
/* Flush (invalidate only) a region (smaller than a page) */
extern void __flush_invalidate_region(void *start, int size);

#define flush_cache_vmap(start, end)		flush_cache_all()
#define flush_cache_vunmap(start, end)		flush_cache_all()

#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
	do {							\
		flush_cache_page(vma, vaddr, page_to_pfn(page));\
		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) \
	do {							\
		flush_cache_page(vma, vaddr, page_to_pfn(page));\
		memcpy(dst, src, len);				\
	} while (0)

#define HAVE_ARCH_UNMAPPED_AREA

/* Page flag for lazy dcache write-back for the aliasing UP caches */
#define PG_dcache_dirty	PG_arch_1

#endif /* __KERNEL__ */
#endif /* __ASM_SH_CACHEFLUSH_H */