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 /* 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 */ 96