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5b497af4 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | /* |
3 | * Copyright(c) 2017 IBM Corporation. All rights reserved. | |
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4 | */ |
5 | ||
6 | #include <linux/string.h> | |
7 | #include <linux/export.h> | |
6c44741d | 8 | #include <linux/uaccess.h> |
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9 | |
10 | #include <asm/cacheflush.h> | |
11 | ||
12 | /* | |
13 | * CONFIG_ARCH_HAS_PMEM_API symbols | |
14 | */ | |
15 | void arch_wb_cache_pmem(void *addr, size_t size) | |
16 | { | |
17 | unsigned long start = (unsigned long) addr; | |
1cfb725f | 18 | flush_dcache_range(start, start + size); |
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19 | } |
20 | EXPORT_SYMBOL(arch_wb_cache_pmem); | |
21 | ||
22 | void arch_invalidate_pmem(void *addr, size_t size) | |
23 | { | |
24 | unsigned long start = (unsigned long) addr; | |
1cfb725f | 25 | flush_dcache_range(start, start + size); |
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26 | } |
27 | EXPORT_SYMBOL(arch_invalidate_pmem); | |
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28 | |
29 | /* | |
30 | * CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE symbols | |
31 | */ | |
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); | |
1cfb725f | 38 | flush_dcache_range(start, start + size); |
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39 | |
40 | return copied; | |
41 | } | |
42 | ||
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); | |
1cfb725f | 48 | flush_dcache_range(start, start + size); |
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49 | |
50 | return dest; | |
51 | } | |
52 | EXPORT_SYMBOL(memcpy_flushcache); | |
53 | ||
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); |