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(to: dest, from: src, count: 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 */ |
99 | |