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dea3101e JB |
1 | /******************************************************************* |
2 | * This file is part of the Emulex Linux Device Driver for * | |
c44ce173 JSEC |
3 | * Fibre Channel Host Bus Adapters. * |
4 | * Copyright (C) 2004-2005 Emulex. All rights reserved. * | |
5 | * EMULEX and SLI are trademarks of Emulex. * | |
dea3101e JB |
6 | * www.emulex.com * |
7 | * * | |
8 | * This program is free software; you can redistribute it and/or * | |
c44ce173 JSEC |
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. * | |
dea3101e JB |
19 | *******************************************************************/ |
20 | ||
21 | /* | |
dea3101e JB |
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 | *******************************************************************/ | |
44456d37 | 33 | #include <asm/byteorder.h> |
dea3101e | 34 | |
44456d37 | 35 | #ifdef __BIG_ENDIAN |
dea3101e JB |
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 */ |