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
98
99
100
101
102
103
104
105
</*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2004-2011 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.emulex.com *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of version 2 of the GNU General *
* Public License as published by the Free Software Foundation. *
* This program is distributed in the hope that it will be useful. *
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
* TO BE LEGALLY INVALID. See the GNU General Public License for *
* more details, a copy of which can be found in the file COPYING *
* included with this package. *
*******************************************************************/
/*
* 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().
*******************************************************************/
#include <asm/byteorder.h>
#ifdef __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)
{
/* convert bytes in argument list to word count for copy function */
__iowrite32_copy(dest, src, bytes / sizeof(uint32_t));
}
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 */
|
