1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Enterprise Fibre Channel Host Bus Adapters. *
* Refer to the README file included with this package for *
* driver version and adapter support. *
* Copyright (C) 2004 Emulex Corporation. *
* www.emulex.com *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details, a copy of which *
* can be found in the file COPYING included with this package. *
*******************************************************************/
/*
* $Id: lpfc_compat.h 1.32 2005/01/25 17:51:45EST sf_support Exp $
*
* This file provides macros to aid compilation in the Linux 2.4 kernel
* over various platform architectures.
*/
/*******************************************************************
Note: HBA's SLI memory contains little-endian LW.
Thus to access it from a little-endian host,
memcpy_toio() and memcpy_fromio() can be used.
However on a big-endian host, copy 4 bytes at a time,
using writel() and readl().
*******************************************************************/
#if __BIG_ENDIAN
static inline void
lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes)
{
uint32_t __iomem *dest32;
uint32_t *src32;
unsigned int four_bytes;
dest32 = (uint32_t __iomem *) dest;
src32 = (uint32_t *) src;
/* write input bytes, 4 bytes at a time */
for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
writel( *src32, dest32);
readl(dest32); /* flush */
dest32++;
src32++;
}
return;
}
static inline void
lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
{
uint32_t *dest32;
uint32_t __iomem *src32;
unsigned int four_bytes;
dest32 = (uint32_t *) dest;
src32 = (uint32_t __iomem *) src;
/* read input bytes, 4 bytes at a time */
for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
*dest32 = readl( src32);
dest32++;
src32++;
}
return;
}
#else
static inline void
lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes)
{
/* actually returns 1 byte past dest */
memcpy_toio( dest, src, bytes);
}
static inline void
lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
{
/* actually returns 1 byte past dest */
memcpy_fromio( dest, src, bytes);
}
#endif /* __BIG_ENDIAN */
|
