1 /* 2 * Copyright(c) 2017 IBM Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of version 2 of the GNU General Public License as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 */ 13 14 #include <linux/string.h> 15 #include <linux/export.h> 16 #include <linux/uaccess.h> 17 18 #include <asm/cacheflush.h> 19 20 /* 21 * CONFIG_ARCH_HAS_PMEM_API symbols 22 */ 23 void arch_wb_cache_pmem(void *addr, size_t size) 24 { 25 unsigned long start = (unsigned long) addr; 26 flush_inval_dcache_range(start, start + size); 27 } 28 EXPORT_SYMBOL(arch_wb_cache_pmem); 29 30 void arch_invalidate_pmem(void *addr, size_t size) 31 { 32 unsigned long start = (unsigned long) addr; 33 flush_inval_dcache_range(start, start + size); 34 } 35 EXPORT_SYMBOL(arch_invalidate_pmem); 36 37 /* 38 * CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE symbols 39 */ 40 long __copy_from_user_flushcache(void *dest, const void __user *src, 41 unsigned size) 42 { 43 unsigned long copied, start = (unsigned long) dest; 44 45 copied = __copy_from_user(dest, src, size); 46 flush_inval_dcache_range(start, start + size); 47 48 return copied; 49 } 50 51 void *memcpy_flushcache(void *dest, const void *src, size_t size) 52 { 53 unsigned long start = (unsigned long) dest; 54 55 memcpy(dest, src, size); 56 flush_inval_dcache_range(start, start + size); 57 58 return dest; 59 } 60 EXPORT_SYMBOL(memcpy_flushcache); 61 62 void memcpy_page_flushcache(char *to, struct page *page, size_t offset, 63 size_t len) 64 { 65 memcpy_flushcache(to, page_to_virt(page) + offset, len); 66 } 67 EXPORT_SYMBOL(memcpy_page_flushcache); 68