1/******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2005 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/******************************************************************* 27Note: HBA's SLI memory contains little-endian LW. 28Thus to access it from a little-endian host, 29memcpy_toio() and memcpy_fromio() can be used. 30However on a big-endian host, copy 4 bytes at a time, 31using writel() and readl(). 32 *******************************************************************/ 33#include <asm/byteorder.h> 34 35#ifdef __BIG_ENDIAN 36 37static inline void 38lpfc_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 59static inline void 60lpfc_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 82static inline void 83lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes) 84{ 85 __iowrite32_copy(dest, src, bytes); 86} 87 88static inline void 89lpfc_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