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 #include <asm/shmparam.h>
   5
   6 extern void flush_dcache_page(struct page *page);
   7
   8 static inline unsigned long pages_do_alias(unsigned long addr1,
   9                                            unsigned long addr2)
  10 {
  11         return (addr1 ^ addr2) & (SHMLBA-1);
  12 }
  13
  14 static inline void clear_user_page(void *addr, unsigned long vaddr,
  15                                    struct page *page)
  16 {
  17         clear_page(addr);
  18         if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
  19                 flush_dcache_page(page);
  20 }
  21
  22 static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
  23                                   struct page *page)
  24 {
  25         copy_page(to, from);
  26         if (pages_do_alias((unsigned long) to, vaddr & PAGE_MASK))
  27                 flush_dcache_page(page);
  28 }