1/* SPDX-License-Identifier: GPL-2.0 */
2// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
3
4#include <asm/shmparam.h>
5
6extern void flush_dcache_page(struct page *page);
7
8static inline unsigned long pages_do_alias(unsigned long addr1,
9					   unsigned long addr2)
10{
11	return (addr1 ^ addr2) & (SHMLBA-1);
12}
13
14static 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
22static 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