105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/*
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* Copyright (c) 2012 The Chromium OS Authors.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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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 as
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* published by the Free Software Foundation; either version 2 of
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* 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.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _ENDIAN_H_
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#define _ENDIAN_H_
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#include <arch/types.h>
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#include <libpayload-config.h>
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static inline uint16_t swap_bytes16(uint16_t in)
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{
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return ((in & 0xFF) << 8) | ((in & 0xFF00) >> 8);
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}
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static inline uint32_t swap_bytes32(uint32_t in)
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{
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return ((in & 0xFF) << 24) | ((in & 0xFF00) << 8) |
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((in & 0xFF0000) >> 8) | ((in & 0xFF000000) >> 24);
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}
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static inline uint64_t swap_bytes64(uint64_t in)
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{
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return ((uint64_t)swap_bytes32((uint32_t)in) << 32) |
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((uint64_t)swap_bytes32((uint32_t)(in >> 32)));
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}
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/* Endian functions from glibc 2.9 / BSD "endian.h" */
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#if defined CONFIG_BIG_ENDIAN
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#define htobe16(in) (in)
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#define htobe32(in) (in)
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#define htobe64(in) (in)
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#define htole16(in) swap_bytes16(in)
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#define htole32(in) swap_bytes32(in)
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#define htole64(in) swap_bytes64(in)
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#elif defined CONFIG_LITTLE_ENDIAN
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#define htobe16(in) swap_bytes16(in)
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#define htobe32(in) swap_bytes32(in)
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#define htobe64(in) swap_bytes64(in)
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#define htole16(in) (in)
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#define htole32(in) (in)
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#define htole64(in) (in)
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#else
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#error Cant tell if the CPU is little or big endian.
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#endif
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#define be16toh(in) htobe16(in)
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#define be32toh(in) htobe32(in)
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#define be64toh(in) htobe64(in)
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#define le16toh(in) htole16(in)
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#define le32toh(in) htole32(in)
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#define le64toh(in) htole64(in)
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#define htonw(in) htobe16(in)
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#define htonl(in) htobe32(in)
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#define htonll(in) htobe64(in)
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#define ntohw(in) be16toh(in)
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#define ntohl(in) be32toh(in)
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#define ntohll(in) be64toh(in)
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/* Deprecated names (not in glibc / BSD) */
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#define htobew(in) htobe16(in)
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#define htobel(in) htobe32(in)
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#define htobell(in) htobe64(in)
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#define htolew(in) htole16(in)
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#define htolel(in) htole32(in)
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#define htolell(in) htole64(in)
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#define betohw(in) be16toh(in)
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#define betohl(in) be32toh(in)
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#define betohll(in) be64toh(in)
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#define letohw(in) le16toh(in)
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#define letohl(in) le32toh(in)
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#define letohll(in) le64toh(in)
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#endif
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