97 lines
3 KiB
C
97 lines
3 KiB
C
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/*******************************************************************
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* This file is part of the Emulex Linux Device Driver for *
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* Fibre Channel Host Bus Adapters. *
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* Copyright (C) 2004-2011 Emulex. All rights reserved. *
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* EMULEX and SLI are trademarks of Emulex. *
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* www.emulex.com *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of version 2 of the GNU General *
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* Public License as published by the Free Software Foundation. *
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* This program is distributed in the hope that it will be useful. *
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
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* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
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* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
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* TO BE LEGALLY INVALID. See the GNU General Public License for *
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* more details, a copy of which can be found in the file COPYING *
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* included with this package. *
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*******************************************************************/
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/*
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* This file provides macros to aid compilation in the Linux 2.4 kernel
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* over various platform architectures.
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*/
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/*******************************************************************
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Note: HBA's SLI memory contains little-endian LW.
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Thus to access it from a little-endian host,
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memcpy_toio() and memcpy_fromio() can be used.
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However on a big-endian host, copy 4 bytes at a time,
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using writel() and readl().
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*******************************************************************/
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#include <asm/byteorder.h>
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#ifdef __BIG_ENDIAN
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static inline void
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lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes)
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{
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uint32_t __iomem *dest32;
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uint32_t *src32;
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unsigned int four_bytes;
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dest32 = (uint32_t __iomem *) dest;
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src32 = (uint32_t *) src;
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/* write input bytes, 4 bytes at a time */
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for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
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writel( *src32, dest32);
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readl(dest32); /* flush */
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dest32++;
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src32++;
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}
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return;
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}
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static inline void
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lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
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{
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uint32_t *dest32;
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uint32_t __iomem *src32;
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unsigned int four_bytes;
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dest32 = (uint32_t *) dest;
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src32 = (uint32_t __iomem *) src;
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/* read input bytes, 4 bytes at a time */
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for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
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*dest32 = readl( src32);
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dest32++;
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src32++;
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}
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return;
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}
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#else
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static inline void
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lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes)
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{
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/* convert bytes in argument list to word count for copy function */
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__iowrite32_copy(dest, src, bytes / sizeof(uint32_t));
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}
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static inline void
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lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
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{
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/* actually returns 1 byte past dest */
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memcpy_fromio( dest, src, bytes);
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}
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#endif /* __BIG_ENDIAN */
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