arch/csky/abiv1/inc/abi/page.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3
   4 extern unsigned long shm_align_mask;
   5 extern void flush_dcache_page(struct page *page);
   6
   7 static inline unsigned long pages_do_alias(unsigned long addr1,
   8                                            unsigned long addr2)
   9 {
  10         return (addr1 ^ addr2) & shm_align_mask;
  11 }
  12
  13 static inline void clear_user_page(void *addr, unsigned long vaddr,
  14                                    struct page *page)
  15 {
  16         clear_page(addr);
  17         if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
  18                 flush_dcache_page(page);
  19 }
  20
  21 static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
  22                                   struct page *page)
  23 {
  24         copy_page(to, from);
  25         if (pages_do_alias((unsigned long) to, vaddr & PAGE_MASK))
  26                 flush_dcache_page(page);
  27 }