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1 | /* |
2 | * Copyright 2006 PathScale, Inc. All Rights Reserved. | |
3 | * | |
4 | * This file is free software; you can redistribute it and/or modify | |
5 | * it under the terms of version 2 of the GNU General Public License | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software Foundation, | |
15 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
16 | */ | |
17 | ||
c27a0d75 | 18 | #include <linux/module.h> |
ad6b97fc | 19 | #include <linux/io.h> |
c27a0d75 BS |
20 | |
21 | /** | |
22 | * __iowrite32_copy - copy data to MMIO space, in 32-bit units | |
23 | * @to: destination, in MMIO space (must be 32-bit aligned) | |
24 | * @from: source (must be 32-bit aligned) | |
25 | * @count: number of 32-bit quantities to copy | |
26 | * | |
27 | * Copy data from kernel space to MMIO space, in units of 32 bits at a | |
28 | * time. Order of access is not guaranteed, nor is a memory barrier | |
29 | * performed afterwards. | |
30 | */ | |
31 | void __attribute__((weak)) __iowrite32_copy(void __iomem *to, | |
32 | const void *from, | |
33 | size_t count) | |
34 | { | |
35 | u32 __iomem *dst = to; | |
36 | const u32 *src = from; | |
37 | const u32 *end = src + count; | |
38 | ||
39 | while (src < end) | |
40 | __raw_writel(*src++, dst++); | |
41 | } | |
42 | EXPORT_SYMBOL_GPL(__iowrite32_copy); | |
22ae813b BG |
43 | |
44 | /** | |
45 | * __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units | |
46 | * @to: destination, in MMIO space (must be 64-bit aligned) | |
47 | * @from: source (must be 64-bit aligned) | |
48 | * @count: number of 64-bit quantities to copy | |
49 | * | |
50 | * Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a | |
51 | * time. Order of access is not guaranteed, nor is a memory barrier | |
52 | * performed afterwards. | |
53 | */ | |
54 | void __attribute__((weak)) __iowrite64_copy(void __iomem *to, | |
55 | const void *from, | |
56 | size_t count) | |
57 | { | |
58 | #ifdef CONFIG_64BIT | |
59 | u64 __iomem *dst = to; | |
60 | const u64 *src = from; | |
61 | const u64 *end = src + count; | |
62 | ||
63 | while (src < end) | |
64 | __raw_writeq(*src++, dst++); | |
65 | #else | |
66 | __iowrite32_copy(to, from, count * 2); | |
67 | #endif | |
68 | } | |
69 | ||
70 | EXPORT_SYMBOL_GPL(__iowrite64_copy); |