cvmx-swap.h revision 215990
1/***********************license start*************** 2 * Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights 3 * reserved. 4 * 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * * Redistributions in binary form must reproduce the above 14 * copyright notice, this list of conditions and the following 15 * disclaimer in the documentation and/or other materials provided 16 * with the distribution. 17 18 * * Neither the name of Cavium Networks nor the names of 19 * its contributors may be used to endorse or promote products 20 * derived from this software without specific prior written 21 * permission. 22 23 * This Software, including technical data, may be subject to U.S. export control 24 * laws, including the U.S. Export Administration Act and its associated 25 * regulations, and may be subject to export or import regulations in other 26 * countries. 27 28 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" 29 * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR 30 * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO 31 * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR 32 * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM 33 * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, 34 * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF 35 * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR 36 * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR 37 * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. 38 ***********************license end**************************************/ 39 40 41 42 43 44 45 46/** 47 * @file 48 * 49 * Utility functions for endian swapping 50 * 51 * <hr>$Revision: 32636 $<hr> 52 */ 53 54#ifndef __CVMX_SWAP_H__ 55#define __CVMX_SWAP_H__ 56 57#ifdef __cplusplus 58extern "C" { 59#endif 60 61 62/** 63 * Byte swap a 16 bit number 64 * 65 * @param x 16 bit number 66 * @return Byte swapped result 67 */ 68static inline uint16_t cvmx_swap16(uint16_t x) 69{ 70 return ((uint16_t)((((uint16_t)(x) & (uint16_t)0x00ffU) << 8) | 71 (((uint16_t)(x) & (uint16_t)0xff00U) >> 8) )); 72} 73 74 75/** 76 * Byte swap a 32 bit number 77 * 78 * @param x 32 bit number 79 * @return Byte swapped result 80 */ 81static inline uint32_t cvmx_swap32(uint32_t x) 82{ 83 return ((uint32_t)((((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) | 84 (((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) | 85 (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) | 86 (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24) )); 87} 88 89 90/** 91 * Byte swap a 64 bit number 92 * 93 * @param x 64 bit number 94 * @return Byte swapped result 95 */ 96static inline uint64_t cvmx_swap64(uint64_t x) 97{ 98 return ((x >> 56) | 99 (((x >> 48) & 0xfful) << 8) | 100 (((x >> 40) & 0xfful) << 16) | 101 (((x >> 32) & 0xfful) << 24) | 102 (((x >> 24) & 0xfful) << 32) | 103 (((x >> 16) & 0xfful) << 40) | 104 (((x >> 8) & 0xfful) << 48) | 105 (((x >> 0) & 0xfful) << 56)); 106} 107 108 109#if __BYTE_ORDER == __BIG_ENDIAN 110 111#define cvmx_cpu_to_le16(x) cvmx_swap16(x) 112#define cvmx_cpu_to_le32(x) cvmx_swap32(x) 113#define cvmx_cpu_to_le64(x) cvmx_swap64(x) 114 115#define cvmx_cpu_to_be16(x) (x) 116#define cvmx_cpu_to_be32(x) (x) 117#define cvmx_cpu_to_be64(x) (x) 118 119#else 120 121#define cvmx_cpu_to_le16(x) (x) 122#define cvmx_cpu_to_le32(x) (x) 123#define cvmx_cpu_to_le64(x) (x) 124 125#define cvmx_cpu_to_be16(x) cvmx_swap16(x) 126#define cvmx_cpu_to_be32(x) cvmx_swap32(x) 127#define cvmx_cpu_to_be64(x) cvmx_swap64(x) 128 129#endif 130 131#define cvmx_le16_to_cpu(x) cvmx_cpu_to_le16(x) 132#define cvmx_le32_to_cpu(x) cvmx_cpu_to_le32(x) 133#define cvmx_le64_to_cpu(x) cvmx_cpu_to_le64(x) 134 135#define cvmx_be16_to_cpu(x) cvmx_cpu_to_be16(x) 136#define cvmx_be32_to_cpu(x) cvmx_cpu_to_be32(x) 137#define cvmx_be64_to_cpu(x) cvmx_cpu_to_be64(x) 138 139#ifdef __cplusplus 140} 141#endif 142 143#endif /* __CVMX_SWAP_H__ */ 144