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 } 29