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

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  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 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
 22 static inline void flush_dcache_page(struct page *page)
 23 {
 24         if (test_bit(PG_dcache_clean, &page->flags))
 25                 clear_bit(PG_dcache_clean, &page->flags);
 26 }
 27 
 28 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
 29 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
 30 #define flush_icache_page(vma, page)            do { } while (0)
 31 
 32 #define flush_icache_range(start, end)          cache_wbinv_range(start, end)
 33 
 34 void flush_icache_mm_range(struct mm_struct *mm,
 35                         unsigned long start, unsigned long end);
 36 void flush_icache_deferred(struct mm_struct *mm);
 37 
 38 #define flush_cache_vmap(start, end)            do { } while (0)
 39 #define flush_cache_vunmap(start, end)          do { } while (0)
 40 
 41 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
 42 do { \
 43         memcpy(dst, src, len); \
 44         if (vma->vm_flags & VM_EXEC) { \
 45                 dcache_wb_range((unsigned long)dst, \
 46                                 (unsigned long)dst + len); \
 47                 flush_icache_mm_range(current->mm, \
 48                                 (unsigned long)dst, \
 49                                 (unsigned long)dst + len); \
 50                 } \
 51 } while (0)
 52 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 53         memcpy(dst, src, len)
 54 
 55 #endif /* __ABI_CSKY_CACHEFLUSH_H */
 56 

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