1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun #include <asm/shmparam.h>
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun extern void flush_dcache_page(struct page *page);
7*4882a593Smuzhiyun
pages_do_alias(unsigned long addr1,unsigned long addr2)8*4882a593Smuzhiyun static inline unsigned long pages_do_alias(unsigned long addr1,
9*4882a593Smuzhiyun unsigned long addr2)
10*4882a593Smuzhiyun {
11*4882a593Smuzhiyun return (addr1 ^ addr2) & (SHMLBA-1);
12*4882a593Smuzhiyun }
13*4882a593Smuzhiyun
clear_user_page(void * addr,unsigned long vaddr,struct page * page)14*4882a593Smuzhiyun static inline void clear_user_page(void *addr, unsigned long vaddr,
15*4882a593Smuzhiyun struct page *page)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun clear_page(addr);
18*4882a593Smuzhiyun if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
19*4882a593Smuzhiyun flush_dcache_page(page);
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
copy_user_page(void * to,void * from,unsigned long vaddr,struct page * page)22*4882a593Smuzhiyun static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
23*4882a593Smuzhiyun struct page *page)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun copy_page(to, from);
26*4882a593Smuzhiyun if (pages_do_alias((unsigned long) to, vaddr & PAGE_MASK))
27*4882a593Smuzhiyun flush_dcache_page(page);
28*4882a593Smuzhiyun }
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