arch/sparc/include/asm/cacheflush_64.h

   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
  14 void __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  */
  34 void flush_icache_range(unsigned long start, unsigned long end);
  35 void __flush_icache_page(unsigned long);
  36
  37 void __flush_dcache_page(void *addr, int flush_icache);
  38 void flush_dcache_folio_impl(struct folio *folio);
  39 #ifdef CONFIG_SMP
  40 void smp_flush_dcache_folio_impl(struct folio *folio, int cpu);
  41 void flush_dcache_folio_all(struct mm_struct *mm, struct folio *folio);
  42 #else
  43 #define smp_flush_dcache_folio_impl(folio, cpu) flush_dcache_folio_impl(folio)
  44 #define flush_dcache_folio_all(mm, folio) flush_dcache_folio_impl(folio)
  45 #endif
  46
  47 void __flush_dcache_range(unsigned long start, unsigned long end);
  48 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  49 void flush_dcache_folio(struct folio *folio);
  50 #define flush_dcache_folio flush_dcache_folio
  51 static inline void flush_dcache_page(struct page *page)
  52 {
  53         flush_dcache_folio(page_folio(page));
  54 }
  55
  56 void flush_ptrace_access(struct vm_area_struct *, struct page *,
  57                          unsigned long uaddr, void *kaddr,
  58                          unsigned long len, int write);
  59
  60 #define copy_to_user_page(vma, page, vaddr, dst, src, len)              \
  61         do {                                                            \
  62                 flush_cache_page(vma, vaddr, page_to_pfn(page));        \
  63                 memcpy(dst, src, len);                                  \
  64                 flush_ptrace_access(vma, page, vaddr, src, len, 0);     \
  65         } while (0)
  66
  67 #define copy_from_user_page(vma, page, vaddr, dst, src, len)            \
  68         do {                                                            \
  69                 flush_cache_page(vma, vaddr, page_to_pfn(page));        \
  70                 memcpy(dst, src, len);                                  \
  71                 flush_ptrace_access(vma, page, vaddr, dst, len, 1);     \
  72         } while (0)
  73
  74 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  75 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  76
  77 #define flush_cache_vmap(start, end)            do { } while (0)
  78 #define flush_cache_vmap_early(start, end)      do { } while (0)
  79 #define flush_cache_vunmap(start, end)          do { } while (0)
  80
  81 #endif /* !__ASSEMBLY__ */
  82
  83 #endif /* _SPARC64_CACHEFLUSH_H */