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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 | |
18 | #include <linux/export.h> |
19 | #include <linux/io.h> |
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); |
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); |
71 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9