arch/csky/abiv2/inc/abi/cacheflush.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef __ABI_CSKY_CACHEFLUSH_H
   4 #define __ABI_CSKY_CACHEFLUSH_H
   5
   6 /* Keep includes the same across arches.  */
   7 #include <linux/mm.h>
   8
   9 /*
  10  * The cache doesn't need to be flushed when TLB entries change when
  11  * the cache is mapped to physical memory, not virtual memory
  12  */
  13 #define flush_cache_all()                       do { } while (0)
  14 #define flush_cache_mm(mm)                      do { } while (0)
  15 #define flush_cache_dup_mm(mm)                  do { } while (0)
  16 #define flush_cache_range(vma, start, end)      do { } while (0)
  17 #define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
  18
  19 #define PG_dcache_clean         PG_arch_1
  20
  21 static inline void flush_dcache_folio(struct folio *folio)
  22 {
  23         if (test_bit(PG_dcache_clean, &folio->flags))
  24                 clear_bit(PG_dcache_clean, &folio->flags);
  25 }
  26 #define flush_dcache_folio flush_dcache_folio
  27
  28 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  29 static inline void flush_dcache_page(struct page *page)
  30 {
  31         flush_dcache_folio(page_folio(page));
  32 }
  33
  34 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  35 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  36
  37 #define flush_icache_range(start, end)          cache_wbinv_range(start, end)
  38
  39 void flush_icache_mm_range(struct mm_struct *mm,
  40                         unsigned long start, unsigned long end);
  41 void flush_icache_deferred(struct mm_struct *mm);
  42
  43 #define flush_cache_vmap(start, end)            do { } while (0)
  44 #define flush_cache_vmap_early(start, end)      do { } while (0)
  45 #define flush_cache_vunmap(start, end)          do { } while (0)
  46
  47 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  48 do { \
  49         memcpy(dst, src, len); \
  50         if (vma->vm_flags & VM_EXEC) { \
  51                 dcache_wb_range((unsigned long)dst, \
  52                                 (unsigned long)dst + len); \
  53                 flush_icache_mm_range(current->mm, \
  54                                 (unsigned long)dst, \
  55                                 (unsigned long)dst + len); \
  56                 } \
  57 } while (0)
  58 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  59         memcpy(dst, src, len)
  60
  61 #endif /* __ABI_CSKY_CACHEFLUSH_H */