162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci#include <asm/shmparam.h> 462306a36Sopenharmony_ci 562306a36Sopenharmony_ciextern void flush_dcache_page(struct page *page); 662306a36Sopenharmony_ci 762306a36Sopenharmony_cistatic inline unsigned long pages_do_alias(unsigned long addr1, 862306a36Sopenharmony_ci unsigned long addr2) 962306a36Sopenharmony_ci{ 1062306a36Sopenharmony_ci return (addr1 ^ addr2) & (SHMLBA-1); 1162306a36Sopenharmony_ci} 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_cistatic inline void clear_user_page(void *addr, unsigned long vaddr, 1462306a36Sopenharmony_ci struct page *page) 1562306a36Sopenharmony_ci{ 1662306a36Sopenharmony_ci clear_page(addr); 1762306a36Sopenharmony_ci if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK)) 1862306a36Sopenharmony_ci flush_dcache_page(page); 1962306a36Sopenharmony_ci} 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_cistatic inline void copy_user_page(void *to, void *from, unsigned long vaddr, 2262306a36Sopenharmony_ci struct page *page) 2362306a36Sopenharmony_ci{ 2462306a36Sopenharmony_ci copy_page(to, from); 2562306a36Sopenharmony_ci if (pages_do_alias((unsigned long) to, vaddr & PAGE_MASK)) 2662306a36Sopenharmony_ci flush_dcache_page(page); 2762306a36Sopenharmony_ci} 28