1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2011 Emulex. All rights reserved. * 5 * EMULEX and SLI are trademarks of Emulex. * 6 * www.emulex.com * 7 * * 8 * This program is free software; you can redistribute it and/or * 9 * modify it under the terms of version 2 of the GNU General * 10 * Public License as published by the Free Software Foundation. * 11 * This program is distributed in the hope that it will be useful. * 12 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * 13 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * 14 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * 15 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * 16 * TO BE LEGALLY INVALID. See the GNU General Public License for * 17 * more details, a copy of which can be found in the file COPYING * 18 * 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 #include <asm/byteorder.h> 34 35 #ifdef __BIG_ENDIAN 36 37 static inline void 38 lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes) 39 { 40 uint32_t __iomem *dest32; 41 uint32_t *src32; 42 unsigned int four_bytes; 43 44 45 dest32 = (uint32_t __iomem *) dest; 46 src32 = (uint32_t *) src; 47 48 /* write input bytes, 4 bytes at a time */ 49 for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) { 50 writel( *src32, dest32); 51 readl(dest32); /* flush */ 52 dest32++; 53 src32++; 54 } 55 56 return; 57 } 58 59 static inline void 60 lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes) 61 { 62 uint32_t *dest32; 63 uint32_t __iomem *src32; 64 unsigned int four_bytes; 65 66 67 dest32 = (uint32_t *) dest; 68 src32 = (uint32_t __iomem *) src; 69 70 /* read input bytes, 4 bytes at a time */ 71 for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) { 72 *dest32 = readl( src32); 73 dest32++; 74 src32++; 75 } 76 77 return; 78 } 79 80 #else 81 82 static inline void 83 lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes) 84 { 85 /* convert bytes in argument list to word count for copy function */ 86 __iowrite32_copy(dest, src, bytes / sizeof(uint32_t)); 87 } 88 89 static inline void 90 lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes) 91 { 92 /* actually returns 1 byte past dest */ 93 memcpy_fromio( dest, src, bytes); 94 } 95 96 #endif /* __BIG_ENDIAN */ 97