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/******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Enterprise Fibre Channel Host Bus Adapters. * * Refer to the README file included with this package for * * driver version and adapter support. * * Copyright (C) 2004 Emulex Corporation. * * www.emulex.com * * * * This program is free software; you can redistribute it and/or * * modify it under the terms of the GNU General Public License * * as published by the Free Software Foundation; either version 2 * * of the License, or (at your option) any later version. * * * * This program is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * * GNU General Public License for more details, a copy of which * * can be found in the file COPYING included with this package. * *******************************************************************/ /* * $Id: lpfc_compat.h 1.32 2005/01/25 17:51:45EST sf_support Exp $ * * This file provides macros to aid compilation in the Linux 2.4 kernel * over various platform architectures. */ /******************************************************************* Note: HBA's SLI memory contains little-endian LW. Thus to access it from a little-endian host, memcpy_toio() and memcpy_fromio() can be used. However on a big-endian host, copy 4 bytes at a time, using writel() and readl(). *******************************************************************/ #if __BIG_ENDIAN static inline void lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes) { uint32_t __iomem *dest32; uint32_t *src32; unsigned int four_bytes; dest32 = (uint32_t __iomem *) dest; src32 = (uint32_t *) src; /* write input bytes, 4 bytes at a time */ for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) { writel( *src32, dest32); readl(dest32); /* flush */ dest32++; src32++; } return; } static inline void lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes) { uint32_t *dest32; uint32_t __iomem *src32; unsigned int four_bytes; dest32 = (uint32_t *) dest; src32 = (uint32_t __iomem *) src; /* read input bytes, 4 bytes at a time */ for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) { *dest32 = readl( src32); dest32++; src32++; } return; } #else static inline void lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes) { /* actually returns 1 byte past dest */ memcpy_toio( dest, src, bytes); } static inline void lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes) { /* actually returns 1 byte past dest */ memcpy_fromio( dest, src, bytes); } #endif /* __BIG_ENDIAN */ |