1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term *
5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
6 * Copyright (C) 2004-2011 Emulex. All rights reserved. *
7 * EMULEX and SLI are trademarks of Emulex. *
8 * www.broadcom.com *
9 * *
10 * This program is free software; you can redistribute it and/or *
11 * modify it under the terms of version 2 of the GNU General *
12 * Public License as published by the Free Software Foundation. *
13 * This program is distributed in the hope that it will be useful. *
14 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
15 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
16 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
17 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
18 * TO BE LEGALLY INVALID. See the GNU General Public License for *
19 * more details, a copy of which can be found in the file COPYING *
20 * included with this package. *
21 *******************************************************************/
22
23 /*
24 * This file provides macros to aid compilation in the Linux 2.4 kernel
25 * over various platform architectures.
26 */
27
28 /*******************************************************************
29 Note: HBA's SLI memory contains little-endian LW.
30 Thus to access it from a little-endian host,
31 memcpy_toio() and memcpy_fromio() can be used.
32 However on a big-endian host, copy 4 bytes at a time,
33 using writel() and readl().
34 *******************************************************************/
35 #include <asm/byteorder.h>
36
37 #ifdef __BIG_ENDIAN
38
39 static inline void
40 lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes)
41 {
42 uint32_t __iomem *dest32;
43 uint32_t *src32;
44 unsigned int four_bytes;
45
46
47 dest32 = (uint32_t __iomem *) dest;
48 src32 = (uint32_t *) src;
49
50 /* write input bytes, 4 bytes at a time */
51 for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
52 writel( *src32, dest32);
53 readl(dest32); /* flush */
54 dest32++;
55 src32++;
56 }
57
58 return;
59 }
60
61 static inline void
62 lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
63 {
64 uint32_t *dest32;
65 uint32_t __iomem *src32;
66 unsigned int four_bytes;
67
68
69 dest32 = (uint32_t *) dest;
70 src32 = (uint32_t __iomem *) src;
71
72 /* read input bytes, 4 bytes at a time */
73 for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
74 *dest32 = readl( src32);
75 dest32++;
76 src32++;
77 }
78
79 return;
80 }
81
82 #else
83
84 static inline void
85 lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes)
86 {
87 /* convert bytes in argument list to word count for copy function */
88 __iowrite32_copy(dest, src, bytes / sizeof(uint32_t));
89 }
90
91 static inline void
92 lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
93 {
94 /* actually returns 1 byte past dest */
95 memcpy_fromio( dest, src, bytes);
96 }
97
98 #endif /* __BIG_ENDIAN */