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qib_pio_copy.c
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1 /*
2  * Copyright (c) 2009 QLogic Corporation. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses. You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  * Redistribution and use in source and binary forms, with or
11  * without modification, are permitted provided that the following
12  * conditions are met:
13  *
14  * - Redistributions of source code must retain the above
15  * copyright notice, this list of conditions and the following
16  * disclaimer.
17  *
18  * - Redistributions in binary form must reproduce the above
19  * copyright notice, this list of conditions and the following
20  * disclaimer in the documentation and/or other materials
21  * provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32 
33 #include "qib.h"
34 
45 void qib_pio_copy(void __iomem *to, const void *from, size_t count)
46 {
47 #ifdef CONFIG_64BIT
48  u64 __iomem *dst = to;
49  const u64 *src = from;
50  const u64 *end = src + (count >> 1);
51 
52  while (src < end)
53  __raw_writeq(*src++, dst++);
54  if (count & 1)
55  __raw_writel(*(const u32 *)src, dst);
56 #else
57  u32 __iomem *dst = to;
58  const u32 *src = from;
59  const u32 *end = src + count;
60 
61  while (src < end)
62  __raw_writel(*src++, dst++);
63 #endif
64 }