96 lines
3.0 KiB
C
96 lines
3.0 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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* Enterprise Fibre Channel Host Bus Adapters. *
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* Refer to the README file included with this package for *
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* driver version and adapter support. *
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* Copyright (C) 2004 Emulex Corporation. *
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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 the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details, a copy of which *
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* can be found in the file COPYING 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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#if __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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/* actually returns 1 byte past dest */
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memcpy_toio( dest, src, bytes);
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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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