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(dest, src, 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