1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2005 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
6 * www.emulex.com *
7 * *
8 * This program is free software; you can redistribute it and/or *
9 * modify it under the terms of version 2 of the GNU General *
10 * Public License as published by the Free Software Foundation. *
11 * This program is distributed in the hope that it will be useful. *
12 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
13 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
14 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
15 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
16 * TO BE LEGALLY INVALID. See the GNU General Public License for *
17 * more details, a copy of which can be found in the file COPYING *
18 * included with this package. *
19 *******************************************************************/
20
21 /*
22 * This file provides macros to aid compilation in the Linux 2.4 kernel
23 * over various platform architectures.
24 */
25
26 /*******************************************************************
27 Note: HBA's SLI memory contains little-endian LW.
28 Thus to access it from a little-endian host,
29 memcpy_toio() and memcpy_fromio() can be used.
30 However on a big-endian host, copy 4 bytes at a time,
31 using writel() and readl().
32 *******************************************************************/
33 #include <asm/byteorder.h>
34
35 #ifdef __BIG_ENDIAN
36
37 static inline void
38 lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes)
39 {
40 uint32_t __iomem *dest32;
41 uint32_t *src32;
42 unsigned int four_bytes;
43
44
45 dest32 = (uint32_t __iomem *) dest;
46 src32 = (uint32_t *) src;
47
48 /* write input bytes, 4 bytes at a time */
49 for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
50 writel( *src32, dest32);
51 readl(dest32); /* flush */
52 dest32++;
53 src32++;
54 }
55
56 return;
57 }
58
59 static inline void
60 lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
61 {
62 uint32_t *dest32;
63 uint32_t __iomem *src32;
64 unsigned int four_bytes;
65
66
67 dest32 = (uint32_t *) dest;
68 src32 = (uint32_t __iomem *) src;
69
70 /* read input bytes, 4 bytes at a time */
71 for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
72 *dest32 = readl( src32);
73 dest32++;
74 src32++;
75 }
76
77 return;
78 }
79
80 #else
81
82 static inline void
83 lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes)
84 {
85 /* actually returns 1 byte past dest */
86 memcpy_toio( dest, src, bytes);
87 }
88
89 static inline void
90 lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
91 {
92 /* actually returns 1 byte past dest */
93 memcpy_fromio( dest, src, bytes);
94 }
95
96 #endif /* __BIG_ENDIAN */
97
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