| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | } |