LXR linux/arch/sh/include/asm/cacheflush.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ASM_SH_CACHEFLUSH_H
   3#define __ASM_SH_CACHEFLUSH_H
   4
   5#ifdef __KERNEL__
   6
   7#include <linux/mm.h>
   8
   9/*
  10 * Cache flushing:
  11 *
  12 *  - flush_cache_all() flushes entire cache
  13 *  - flush_cache_mm(mm) flushes the specified mm context's cache lines
  14 *  - flush_cache_dup mm(mm) handles cache flushing when forking
  15 *  - flush_cache_page(mm, vmaddr, pfn) flushes a single page
  16 *  - flush_cache_range(vma, start, end) flushes a range of pages
  17 *
  18 *  - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
  19 *  - flush_icache_range(start, end) flushes(invalidates) a range for icache
  20 *  - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
  21 *  - flush_cache_sigtramp(vaddr) flushes the signal trampoline
  22 */
  23extern void (*local_flush_cache_all)(void *args);
  24extern void (*local_flush_cache_mm)(void *args);
  25extern void (*local_flush_cache_dup_mm)(void *args);
  26extern void (*local_flush_cache_page)(void *args);
  27extern void (*local_flush_cache_range)(void *args);
  28extern void (*local_flush_dcache_page)(void *args);
  29extern void (*local_flush_icache_range)(void *args);
  30extern void (*local_flush_icache_page)(void *args);
  31extern void (*local_flush_cache_sigtramp)(void *args);
  32
  33static inline void cache_noop(void *args) { }
  34
  35extern void (*__flush_wback_region)(void *start, int size);
  36extern void (*__flush_purge_region)(void *start, int size);
  37extern void (*__flush_invalidate_region)(void *start, int size);
  38
  39extern void flush_cache_all(void);
  40extern void flush_cache_mm(struct mm_struct *mm);
  41extern void flush_cache_dup_mm(struct mm_struct *mm);
  42extern void flush_cache_page(struct vm_area_struct *vma,
  43                                unsigned long addr, unsigned long pfn);
  44extern void flush_cache_range(struct vm_area_struct *vma,
  45                                 unsigned long start, unsigned long end);
  46#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  47extern void flush_dcache_page(struct page *page);
  48extern void flush_icache_range(unsigned long start, unsigned long end);
  49extern void flush_icache_page(struct vm_area_struct *vma,
  50                                 struct page *page);
  51extern void flush_cache_sigtramp(unsigned long address);
  52
  53struct flusher_data {
  54        struct vm_area_struct *vma;
  55        unsigned long addr1, addr2;
  56};
  57
  58#define ARCH_HAS_FLUSH_ANON_PAGE
  59extern void __flush_anon_page(struct page *page, unsigned long);
  60
  61static inline void flush_anon_page(struct vm_area_struct *vma,
  62                                   struct page *page, unsigned long vmaddr)
  63{
  64        if (boot_cpu_data.dcache.n_aliases && PageAnon(page))
  65                __flush_anon_page(page, vmaddr);
  66}
  67static inline void flush_kernel_vmap_range(void *addr, int size)
  68{
  69        __flush_wback_region(addr, size);
  70}
  71static inline void invalidate_kernel_vmap_range(void *addr, int size)
  72{
  73        __flush_invalidate_region(addr, size);
  74}
  75
  76#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
  77static inline void flush_kernel_dcache_page(struct page *page)
  78{
  79        flush_dcache_page(page);
  80}
  81
  82extern void copy_to_user_page(struct vm_area_struct *vma,
  83        struct page *page, unsigned long vaddr, void *dst, const void *src,
  84        unsigned long len);
  85
  86extern void copy_from_user_page(struct vm_area_struct *vma,
  87        struct page *page, unsigned long vaddr, void *dst, const void *src,
  88        unsigned long len);
  89
  90#define flush_cache_vmap(start, end)            local_flush_cache_all(NULL)
  91#define flush_cache_vunmap(start, end)          local_flush_cache_all(NULL)
  92
  93#define flush_dcache_mmap_lock(mapping)         do { } while (0)
  94#define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  95
  96void kmap_coherent_init(void);
  97void *kmap_coherent(struct page *page, unsigned long addr);
  98void kunmap_coherent(void *kvaddr);
  99
 100#define PG_dcache_clean PG_arch_1
 101
 102void cpu_cache_init(void);
 103
 104static inline void *sh_cacheop_vaddr(void *vaddr)
 105{
 106        if (__in_29bit_mode())
 107                vaddr = (void *)CAC_ADDR((unsigned long)vaddr);
 108        return vaddr;
 109}
 110
 111#endif /* __KERNEL__ */
 112#endif /* __ASM_SH_CACHEFLUSH_H */
 113