LXR linux/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
   4extern unsigned long shm_align_mask;
   5extern void flush_dcache_page(struct page *page);
   6
   7static inline unsigned long pages_do_alias(unsigned long addr1,
   8                                           unsigned long addr2)
   9{
  10        return (addr1 ^ addr2) & shm_align_mask;
  11}
  12
  13static 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
  21static 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}
  28