1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright(c) 2017 IBM Corporation. All rights reserved.
4 */
5
6 #include <linux/string.h>
7 #include <linux/export.h>
8 #include <linux/uaccess.h>
9
10 #include <asm/cacheflush.h>
11
12 /*
13 * CONFIG_ARCH_HAS_PMEM_API symbols
14 */
arch_wb_cache_pmem(void * addr,size_t size)15 void arch_wb_cache_pmem(void *addr, size_t size)
16 {
17 unsigned long start = (unsigned long) addr;
18 flush_dcache_range(start, start + size);
19 }
20 EXPORT_SYMBOL(arch_wb_cache_pmem);
21
arch_invalidate_pmem(void * addr,size_t size)22 void arch_invalidate_pmem(void *addr, size_t size)
23 {
24 unsigned long start = (unsigned long) addr;
25 flush_dcache_range(start, start + size);
26 }
27 EXPORT_SYMBOL(arch_invalidate_pmem);
28
29 /*
30 * CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE symbols
31 */
__copy_from_user_flushcache(void * dest,const void __user * src,unsigned size)32 long __copy_from_user_flushcache(void *dest, const void __user *src,
33 unsigned size)
34 {
35 unsigned long copied, start = (unsigned long) dest;
36
37 copied = __copy_from_user(dest, src, size);
38 flush_dcache_range(start, start + size);
39
40 return copied;
41 }
42
memcpy_flushcache(void * dest,const void * src,size_t size)43 void *memcpy_flushcache(void *dest, const void *src, size_t size)
44 {
45 unsigned long start = (unsigned long) dest;
46
47 memcpy(dest, src, size);
48 flush_dcache_range(start, start + size);
49
50 return dest;
51 }
52 EXPORT_SYMBOL(memcpy_flushcache);
53
memcpy_page_flushcache(char * to,struct page * page,size_t offset,size_t len)54 void memcpy_page_flushcache(char *to, struct page *page, size_t offset,
55 size_t len)
56 {
57 memcpy_flushcache(to, page_to_virt(page) + offset, len);
58 }
59 EXPORT_SYMBOL(memcpy_page_flushcache);
60