LXR linux/arch/sparc/include/asm/cacheflush

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _SPARC64_CACHEFLUSH_H
   3#define _SPARC64_CACHEFLUSH_H
   4
   5#include <asm/page.h>
   6
   7#ifndef __ASSEMBLY__
   8
   9#include <linux/mm.h>
  10
  11/* Cache flush operations. */
  12#define flushw_all()    __asm__ __volatile__("flushw")
  13
  14void __flushw_user(void);
  15#define flushw_user() __flushw_user()
  16
  17#define flush_user_windows flushw_user
  18#define flush_register_windows flushw_all
  19
  20/* These are the same regardless of whether this is an SMP kernel or not. */
  21#define flush_cache_mm(__mm) \
  22        do { if ((__mm) == current->mm) flushw_user(); } while(0)
  23#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
  24#define flush_cache_range(vma, start, end) \
  25        flush_cache_mm((vma)->vm_mm)
  26#define flush_cache_page(vma, page, pfn) \
  27        flush_cache_mm((vma)->vm_mm)
  28
  29/*
  30 * On spitfire, the icache doesn't snoop local stores and we don't
  31 * use block commit stores (which invalidate icache lines) during
  32 * module load, so we need this.
  33 */
  34void flush_icache_range(unsigned long start, unsigned long end);
  35void __flush_icache_page(unsigned long);
  36
  37void __flush_dcache_page(void *addr, int flush_icache);
  38void flush_dcache_page_impl(struct page *page);
  39#ifdef CONFIG_SMP
  40void smp_flush_dcache_page_impl(struct page *page, int cpu);
  41void flush_dcache_page_all(struct mm_struct *mm, struct page *page);
  42#else
  43#define smp_flush_dcache_page_impl(page,cpu) flush_dcache_page_impl(page)
  44#define flush_dcache_page_all(mm,page) flush_dcache_page_impl(page)
  45#endif
  46
  47void __flush_dcache_range(unsigned long start, unsigned long end);
  48#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  49void flush_dcache_page(struct page *page);
  50
  51#define flush_icache_page(vma, pg)      do { } while(0)
  52
  53void flush_ptrace_access(struct vm_area_struct *, struct page *,
  54                         unsigned long uaddr, void *kaddr,
  55                         unsigned long len, int write);
  56
  57#define copy_to_user_page(vma, page, vaddr, dst, src, len)              \
  58        do {                                                            \
  59                flush_cache_page(vma, vaddr, page_to_pfn(page));        \
  60                memcpy(dst, src, len);                                  \
  61                flush_ptrace_access(vma, page, vaddr, src, len, 0);     \
  62        } while (0)
  63
  64#define copy_from_user_page(vma, page, vaddr, dst, src, len)            \
  65        do {                                                            \
  66                flush_cache_page(vma, vaddr, page_to_pfn(page));        \
  67                memcpy(dst, src, len);                                  \
  68                flush_ptrace_access(vma, page, vaddr, dst, len, 1);     \
  69        } while (0)
  70
  71#define flush_dcache_mmap_lock(mapping)         do { } while (0)
  72#define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  73
  74#define flush_cache_vmap(start, end)            do { } while (0)
  75#define flush_cache_vunmap(start, end)          do { } while (0)
  76
  77#endif /* !__ASSEMBLY__ */
  78
  79#endif /* _SPARC64_CACHEFLUSH_H */
  80