linux_kernel/arch/csky/abiv1/inc/abi/cacheflush.h

/* SPDX-License-Identifier: GPL-2.0 */
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.

#ifndef __ABI_CSKY_CACHEFLUSH_H
#define __ABI_CSKY_CACHEFLUSH_H

#include <linux/compiler.h>
#include <asm/string.h>
#include <asm/cache.h>

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
extern void flush_dcache_page(struct page *);

#define flush_cache_mm(mm)			cache_wbinv_all()
#define flush_cache_page(vma, page, pfn)	cache_wbinv_all()
#define flush_cache_dup_mm(mm)			cache_wbinv_all()

/*
 * if (current_mm != vma->mm) cache_wbinv_range(start, end) will be broken.
 * Use cache_wbinv_all() here and need to be improved in future.
 */
#define flush_cache_range(vma, start, end)	cache_wbinv_all()
#define flush_cache_vmap(start, end)		cache_wbinv_range(start, end)
#define flush_cache_vunmap(start, end)		cache_wbinv_range(start, end)

#define flush_icache_page(vma, page)		cache_wbinv_all()
#define flush_icache_range(start, end)		cache_wbinv_range(start, end)

#define flush_icache_user_range(vma, pg, adr, len) \
				cache_wbinv_range(adr, adr + len)

#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
do { \
	cache_wbinv_all(); \
	memcpy(dst, src, len); \
	cache_wbinv_all(); \
} while (0)

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

#define flush_dcache_mmap_lock(mapping)		do {} while (0)
#define flush_dcache_mmap_unlock(mapping)	do {} while (0)

#endif /* __ABI_CSKY_CACHEFLUSH_H */