18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */
28c2ecf20Sopenharmony_ci// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
38c2ecf20Sopenharmony_ci
48c2ecf20Sopenharmony_ci#include <asm/shmparam.h>
58c2ecf20Sopenharmony_ci
68c2ecf20Sopenharmony_ciextern void flush_dcache_page(struct page *page);
78c2ecf20Sopenharmony_ci
88c2ecf20Sopenharmony_cistatic inline unsigned long pages_do_alias(unsigned long addr1,
98c2ecf20Sopenharmony_ci					   unsigned long addr2)
108c2ecf20Sopenharmony_ci{
118c2ecf20Sopenharmony_ci	return (addr1 ^ addr2) & (SHMLBA-1);
128c2ecf20Sopenharmony_ci}
138c2ecf20Sopenharmony_ci
148c2ecf20Sopenharmony_cistatic inline void clear_user_page(void *addr, unsigned long vaddr,
158c2ecf20Sopenharmony_ci				   struct page *page)
168c2ecf20Sopenharmony_ci{
178c2ecf20Sopenharmony_ci	clear_page(addr);
188c2ecf20Sopenharmony_ci	if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
198c2ecf20Sopenharmony_ci		flush_dcache_page(page);
208c2ecf20Sopenharmony_ci}
218c2ecf20Sopenharmony_ci
228c2ecf20Sopenharmony_cistatic inline void copy_user_page(void *to, void *from, unsigned long vaddr,
238c2ecf20Sopenharmony_ci				  struct page *page)
248c2ecf20Sopenharmony_ci{
258c2ecf20Sopenharmony_ci	copy_page(to, from);
268c2ecf20Sopenharmony_ci	if (pages_do_alias((unsigned long) to, vaddr & PAGE_MASK))
278c2ecf20Sopenharmony_ci		flush_dcache_page(page);
288c2ecf20Sopenharmony_ci}
29