[mirror_ubuntu-focal-kernel.git] / arch / ia64 / include / asm / cacheflush.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_IA64_CACHEFLUSH_H
#define _ASM_IA64_CACHEFLUSH_H

/*
 * Copyright (C) 2002 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */

#include <linux/page-flags.h>
#include <linux/bitops.h>

#include <asm/page.h>

/*
 * Cache flushing routines.  This is the kind of stuff that can be very expensive, so try
 * to avoid them whenever possible.
 */

#define flush_cache_all()			do { } while (0)
#define flush_cache_mm(mm)			do { } while (0)
#define flush_cache_dup_mm(mm)			do { } while (0)
#define flush_cache_range(vma, start, end)	do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn)	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)

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
#define flush_dcache_page(page)			\
do {						\
	clear_bit(PG_arch_1, &(page)->flags);	\
} while (0)

#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 start, unsigned long end);
extern void clflush_cache_range(void *addr, int size);


#define flush_icache_user_range(vma, page, user_addr, len)					\
do {												\
	unsigned long _addr = (unsigned long) page_address(page) + ((user_addr) & ~PAGE_MASK);	\
	flush_icache_range(_addr, _addr + (len));						\
} while (0)

#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)

#endif /* _ASM_IA64_CACHEFLUSH_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _ASM_IA64_CACHEFLUSH_H
	3	#define _ASM_IA64_CACHEFLUSH_H
	4
	5	/*
	6	* Copyright (C) 2002 Hewlett-Packard Co
	7	* David Mosberger-Tang <davidm@hpl.hp.com>
	8	*/
	9
	10	#include <linux/page-flags.h>
1977f032	11	#include <linux/bitops.h>
1da177e4	12
1da177e4 LT	13	#include <asm/page.h>
	14
	15	/*
	16	* Cache flushing routines. This is the kind of stuff that can be very expensive, so try
	17	* to avoid them whenever possible.
	18	*/
	19
	20	#define flush_cache_all() do { } while (0)
	21	#define flush_cache_mm(mm) do { } while (0)
ec8c0446	22	#define flush_cache_dup_mm(mm) do { } while (0)
1da177e4 LT	23	#define flush_cache_range(vma, start, end) do { } while (0)
	24	#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
	25	#define flush_icache_page(vma,page) do { } while (0)
	26	#define flush_cache_vmap(start, end) do { } while (0)
	27	#define flush_cache_vunmap(start, end) do { } while (0)
	28
2d4dc890	29	#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
1da177e4 LT	30	#define flush_dcache_page(page) \
	31	do { \
	32	clear_bit(PG_arch_1, &(page)->flags); \
	33	} while (0)
	34
	35	#define flush_dcache_mmap_lock(mapping) do { } while (0)
	36	#define flush_dcache_mmap_unlock(mapping) do { } while (0)
	37
	38	extern void flush_icache_range (unsigned long start, unsigned long end);
62fdd767 FY	39	extern void clflush_cache_range(void *addr, int size);
62fdd767 FY	40
1da177e4 LT	41
	42	#define flush_icache_user_range(vma, page, user_addr, len) \
	43	do { \
	44	unsigned long _addr = (unsigned long) page_address(page) + ((user_addr) & ~PAGE_MASK); \
	45	flush_icache_range(_addr, _addr + (len)); \
	46	} while (0)
	47
	48	#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
	49	do { memcpy(dst, src, len); \
	50	flush_icache_user_range(vma, page, vaddr, len); \
	51	} while (0)
	52	#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
	53	memcpy(dst, src, len)
	54
	55	#endif /* _ASM_IA64_CACHEFLUSH_H */