Commit | Line | Data |
---|---|---|
fc47897d CM |
1 | /* |
2 | * Based on arch/arm/kernel/io.c | |
3 | * | |
4 | * Copyright (C) 2012 ARM Ltd. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #include <linux/export.h> | |
20 | #include <linux/types.h> | |
21 | #include <linux/io.h> | |
22 | ||
23 | /* | |
24 | * Copy data from IO memory space to "real" memory space. | |
25 | */ | |
26 | void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count) | |
27 | { | |
28 | unsigned char *t = to; | |
29 | while (count) { | |
30 | count--; | |
31 | *t = readb(from); | |
32 | t++; | |
33 | from++; | |
34 | } | |
35 | } | |
36 | EXPORT_SYMBOL(__memcpy_fromio); | |
37 | ||
38 | /* | |
39 | * Copy data from "real" memory space to IO memory space. | |
40 | */ | |
41 | void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count) | |
42 | { | |
43 | const unsigned char *f = from; | |
44 | while (count) { | |
45 | count--; | |
46 | writeb(*f, to); | |
47 | f++; | |
48 | to++; | |
49 | } | |
50 | } | |
51 | EXPORT_SYMBOL(__memcpy_toio); | |
52 | ||
53 | /* | |
54 | * "memset" on IO memory space. | |
55 | */ | |
56 | void __memset_io(volatile void __iomem *dst, int c, size_t count) | |
57 | { | |
58 | while (count) { | |
59 | count--; | |
60 | writeb(c, dst); | |
61 | dst++; | |
62 | } | |
63 | } | |
64 | EXPORT_SYMBOL(__memset_io); |