| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 1 | /******************************************************************* |
| 2 | * This file is part of the Emulex Linux Device Driver for * |
| 3 | * Enterprise Fibre Channel Host Bus Adapters. * |
| 4 | * Refer to the README file included with this package for * |
| 5 | * driver version and adapter support. * |
| 6 | * Copyright (C) 2004 Emulex Corporation. * |
| 7 | * www.emulex.com * |
| 8 | * * |
| 9 | * This program is free software; you can redistribute it and/or * |
| 10 | * modify it under the terms of the GNU General Public License * |
| 11 | * as published by the Free Software Foundation; either version 2 * |
| 12 | * of the License, or (at your option) any later version. * |
| 13 | * * |
| 14 | * This program is distributed in the hope that it will be useful, * |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 17 | * GNU General Public License for more details, a copy of which * |
| 18 | * can be found in the file COPYING included with this package. * |
| 19 | *******************************************************************/ |
| 20 | |
| 21 | /* |
| dea3101 | 2005-04-17 16:05:31 -0500 | [diff] [blame] | 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 | *******************************************************************/ |
| 33 | |
| 34 | #if __BIG_ENDIAN |
| 35 | |
| 36 | static inline void |
| 37 | lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes) |
| 38 | { |
| 39 | uint32_t __iomem *dest32; |
| 40 | uint32_t *src32; |
| 41 | unsigned int four_bytes; |
| 42 | |
| 43 | |
| 44 | dest32 = (uint32_t __iomem *) dest; |
| 45 | src32 = (uint32_t *) src; |
| 46 | |
| 47 | /* write input bytes, 4 bytes at a time */ |
| 48 | for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) { |
| 49 | writel( *src32, dest32); |
| 50 | readl(dest32); /* flush */ |
| 51 | dest32++; |
| 52 | src32++; |
| 53 | } |
| 54 | |
| 55 | return; |
| 56 | } |
| 57 | |
| 58 | static inline void |
| 59 | lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes) |
| 60 | { |
| 61 | uint32_t *dest32; |
| 62 | uint32_t __iomem *src32; |
| 63 | unsigned int four_bytes; |
| 64 | |
| 65 | |
| 66 | dest32 = (uint32_t *) dest; |
| 67 | src32 = (uint32_t __iomem *) src; |
| 68 | |
| 69 | /* read input bytes, 4 bytes at a time */ |
| 70 | for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) { |
| 71 | *dest32 = readl( src32); |
| 72 | dest32++; |
| 73 | src32++; |
| 74 | } |
| 75 | |
| 76 | return; |
| 77 | } |
| 78 | |
| 79 | #else |
| 80 | |
| 81 | static inline void |
| 82 | lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes) |
| 83 | { |
| 84 | /* actually returns 1 byte past dest */ |
| 85 | memcpy_toio( dest, src, bytes); |
| 86 | } |
| 87 | |
| 88 | static inline void |
| 89 | lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes) |
| 90 | { |
| 91 | /* actually returns 1 byte past dest */ |
| 92 | memcpy_fromio( dest, src, bytes); |
| 93 | } |
| 94 | |
| 95 | #endif /* __BIG_ENDIAN */ |