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2 * Copyright 2006 PathScale, Inc. All Rights Reserved.
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.
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.
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.
18 #include <linux/module.h>
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
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.
31 void __attribute__((weak
)) __iowrite32_copy(void __iomem
*to
,
35 u32 __iomem
*dst
= to
;
36 const u32
*src
= from
;
37 const u32
*end
= src
+ count
;
40 __raw_writel(*src
++, dst
++);
42 EXPORT_SYMBOL_GPL(__iowrite32_copy
);
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
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.
54 void __attribute__((weak
)) __iowrite64_copy(void __iomem
*to
,
59 u64 __iomem
*dst
= to
;
60 const u64
*src
= from
;
61 const u64
*end
= src
+ count
;
64 __raw_writeq(*src
++, dst
++);
66 __iowrite32_copy(to
, from
, count
* 2);
70 EXPORT_SYMBOL_GPL(__iowrite64_copy
);