1 /* SPDX-License-Identifier: GPL-2.0 */
2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
4 extern unsigned long shm_align_mask;
5 extern void flush_dcache_page(struct page *page);
7 static inline unsigned long pages_do_alias(unsigned long addr1,
10 return (addr1 ^ addr2) & shm_align_mask;
13 static inline void clear_user_page(void *addr, unsigned long vaddr,
17 if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
18 flush_dcache_page(page);
21 static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
25 if (pages_do_alias((unsigned long) to, vaddr & PAGE_MASK))
26 flush_dcache_page(page);