1#ifndef __ASM_CACHEFLUSH_H
 2#define __ASM_CACHEFLUSH_H
 
 3
 4/* Keep includes the same across arches.  */
 5#include <linux/mm.h>
 
 
 6
 7/*
 8 * The cache doesn't need to be flushed when TLB entries change when
 9 * the cache is mapped to physical memory, not virtual memory
10 */
11#define flush_cache_all()			do { } while (0)
12#define flush_cache_mm(mm)			do { } while (0)
13#define flush_cache_dup_mm(mm)			do { } while (0)
14#define flush_cache_range(vma, start, end)	do { } while (0)
15#define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
16#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
17#define flush_dcache_page(page)			do { } while (0)
18#define flush_dcache_mmap_lock(mapping)		do { } while (0)
19#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
20#define flush_icache_range(start, end)		do { } while (0)
21#define flush_icache_page(vma,pg)		do { } while (0)
22#define flush_icache_user_range(vma,pg,adr,len)	do { } while (0)
23#define flush_cache_vmap(start, end)		do { } while (0)
24#define flush_cache_vunmap(start, end)		do { } while (0)
 
 
 
 
 
 
25
26#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
27	do { \
28		memcpy(dst, src, len); \
29		flush_icache_user_range(vma, page, vaddr, len); \
30	} while (0)
 
 
 
31#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
32	memcpy(dst, src, len)
 
33
34#endif /* __ASM_CACHEFLUSH_H */

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _ASM_GENERIC_CACHEFLUSH_H
  3#define _ASM_GENERIC_CACHEFLUSH_H
  4
  5struct mm_struct;
  6struct vm_area_struct;
  7struct page;
  8struct address_space;
  9
 10/*
 11 * The cache doesn't need to be flushed when TLB entries change when
 12 * the cache is mapped to physical memory, not virtual memory
 13 */
 14#ifndef flush_cache_all
 15static inline void flush_cache_all(void)
 16{
 17}
 18#endif
 19
 20#ifndef flush_cache_mm
 21static inline void flush_cache_mm(struct mm_struct *mm)
 22{
 23}
 24#endif
 25
 26#ifndef flush_cache_dup_mm
 27static inline void flush_cache_dup_mm(struct mm_struct *mm)
 28{
 29}
 30#endif
 31
 32#ifndef flush_cache_range
 33static inline void flush_cache_range(struct vm_area_struct *vma,
 34				     unsigned long start,
 35				     unsigned long end)
 36{
 37}
 38#endif
 39
 40#ifndef flush_cache_page
 41static inline void flush_cache_page(struct vm_area_struct *vma,
 42				    unsigned long vmaddr,
 43				    unsigned long pfn)
 44{
 45}
 46#endif
 47
 48#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
 49static inline void flush_dcache_page(struct page *page)
 50{
 51}
 52#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
 53#endif
 54
 55
 56#ifndef flush_dcache_mmap_lock
 57static inline void flush_dcache_mmap_lock(struct address_space *mapping)
 58{
 59}
 60#endif
 61
 62#ifndef flush_dcache_mmap_unlock
 63static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
 64{
 65}
 66#endif
 67
 68#ifndef flush_icache_range
 69static inline void flush_icache_range(unsigned long start, unsigned long end)
 70{
 71}
 72#endif
 73
 74#ifndef flush_icache_user_range
 75#define flush_icache_user_range flush_icache_range
 76#endif
 77
 78#ifndef flush_icache_page
 79static inline void flush_icache_page(struct vm_area_struct *vma,
 80				     struct page *page)
 81{
 82}
 83#endif
 84
 85#ifndef flush_icache_user_page
 86static inline void flush_icache_user_page(struct vm_area_struct *vma,
 87					   struct page *page,
 88					   unsigned long addr, int len)
 89{
 90}
 91#endif
 92
 93#ifndef flush_cache_vmap
 94static inline void flush_cache_vmap(unsigned long start, unsigned long end)
 95{
 96}
 97#endif
 98
 99#ifndef flush_cache_vunmap
100static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
101{
102}
103#endif
104
105#ifndef copy_to_user_page
106#define copy_to_user_page(vma, page, vaddr, dst, src, len)	\
107	do { \
108		memcpy(dst, src, len); \
109		flush_icache_user_page(vma, page, vaddr, len); \
110	} while (0)
111#endif
112
113#ifndef copy_from_user_page
114#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
115	memcpy(dst, src, len)
116#endif
117
118#endif /* _ASM_GENERIC_CACHEFLUSH_H */