cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

lpfc_compat.h (3253B)

      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/*******************************************************************
     29Note: HBA's SLI memory contains little-endian LW.
     30Thus to access it from a little-endian host,
     31memcpy_toio() and memcpy_fromio() can be used.
     32However on a big-endian host, copy 4 bytes at a time,
     33using writel() and readl().
     34 *******************************************************************/
     35#include <asm/byteorder.h>
     36
     37#ifdef __BIG_ENDIAN
     38
     39static inline void
     40lpfc_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
     61static inline void
     62lpfc_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
     84static inline void
     85lpfc_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
     91static inline void
     92lpfc_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 */