root/arch/csky/abiv1/inc/abi/cacheflush.h

INCLUDED FROM

DEFINITIONS

1. flush_kernel_vmap_range
2. invalidate_kernel_vmap_range
3. flush_anon_page

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3 
   4 #ifndef __ABI_CSKY_CACHEFLUSH_H
   5 #define __ABI_CSKY_CACHEFLUSH_H
   6 
   7 #include <linux/mm.h>
   8 #include <asm/string.h>
   9 #include <asm/cache.h>
  10 
  11 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  12 extern void flush_dcache_page(struct page *);
  13 
  14 #define flush_cache_mm(mm)                      dcache_wbinv_all()
  15 #define flush_cache_page(vma, page, pfn)        cache_wbinv_all()
  16 #define flush_cache_dup_mm(mm)                  cache_wbinv_all()
  17 
  18 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
  19 extern void flush_kernel_dcache_page(struct page *);
  20 
  21 #define flush_dcache_mmap_lock(mapping)         xa_lock_irq(&mapping->i_pages)
  22 #define flush_dcache_mmap_unlock(mapping)       xa_unlock_irq(&mapping->i_pages)
  23 
  24 static inline void flush_kernel_vmap_range(void *addr, int size)
  25 {
  26         dcache_wbinv_all();
  27 }
  28 static inline void invalidate_kernel_vmap_range(void *addr, int size)
  29 {
  30         dcache_wbinv_all();
  31 }
  32 
  33 #define ARCH_HAS_FLUSH_ANON_PAGE
  34 static inline void flush_anon_page(struct vm_area_struct *vma,
  35                          struct page *page, unsigned long vmaddr)
  36 {
  37         if (PageAnon(page))
  38                 cache_wbinv_all();
  39 }
  40 
  41 /*
  42  * if (current_mm != vma->mm) cache_wbinv_range(start, end) will be broken.
  43  * Use cache_wbinv_all() here and need to be improved in future.
  44  */
  45 extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
  46 #define flush_cache_vmap(start, end)            cache_wbinv_all()
  47 #define flush_cache_vunmap(start, end)          cache_wbinv_all()
  48 
  49 #define flush_icache_page(vma, page)            do {} while (0);
  50 #define flush_icache_range(start, end)          cache_wbinv_range(start, end)
  51 
  52 #define flush_icache_user_range(vma,page,addr,len) \
  53         flush_dcache_page(page)
  54 
  55 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  56 do { \
  57         memcpy(dst, src, len); \
  58 } while (0)
  59 
  60 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  61 do { \
  62         memcpy(dst, src, len); \
  63         cache_wbinv_all(); \
  64 } while (0)
  65 
  66 #endif /* __ABI_CSKY_CACHEFLUSH_H */