94a74998c0
The current endian API support in coreboot doesn't follow any known API that can be shared in userland as well as coreboot proper. To that end provide big and little endian helper functions that can be used in code that can be shared within coreboot proper and userland tools. BUG=chrome-os-partner:44827 BRANCH=None TEST=Built rambi Change-Id: I737facab0c849cb4b95756eefbf3ffd69e558b32 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/11618 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber <nico.h@gmx.de>
158 lines
4.9 KiB
C
158 lines
4.9 KiB
C
/*
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* Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
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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.
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*/
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#ifndef _ENDIAN_H_
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#define _ENDIAN_H_
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#include <arch/byteorder.h>
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#include <stdint.h>
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#include <swab.h>
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#if defined(__LITTLE_ENDIAN)
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#define cpu_to_le64(x) ((uint64_t)(x))
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#define le64_to_cpu(x) ((uint64_t)(x))
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#define cpu_to_le32(x) ((uint32_t)(x))
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#define le32_to_cpu(x) ((uint32_t)(x))
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#define cpu_to_le16(x) ((uint16_t)(x))
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#define le16_to_cpu(x) ((uint16_t)(x))
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#define cpu_to_be64(x) swab64(x)
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#define be64_to_cpu(x) swab64(x)
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#define cpu_to_be32(x) swab32(x)
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#define be32_to_cpu(x) swab32(x)
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#define cpu_to_be16(x) swab16(x)
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#define be16_to_cpu(x) swab16(x)
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#elif defined(__BIG_ENDIAN)
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#define cpu_to_le64(x) swab64(x)
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#define le64_to_cpu(x) swab64(x)
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#define cpu_to_le32(x) swab32(x)
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#define le32_to_cpu(x) swab32(x)
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#define cpu_to_le16(x) swab16(x)
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#define le16_to_cpu(x) swab16(x)
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#define cpu_to_be64(x) ((uint64_t)(x))
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#define be64_to_cpu(x) ((uint64_t)(x))
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#define cpu_to_be32(x) ((uint32_t)(x))
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#define be32_to_cpu(x) ((uint32_t)(x))
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#define cpu_to_be16(x) ((uint16_t)(x))
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#define be16_to_cpu(x) ((uint16_t)(x))
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#else
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#error "<arch/byteorder.h> must #define __LITTLE_ENDIAN or __BIG_ENDIAN"
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#endif
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#define ntohll(x) be64_to_cpu(x)
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#define htonll(x) cpu_to_be64(x)
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#define ntohl(x) be32_to_cpu(x)
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#define htonl(x) cpu_to_be32(x)
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#define __clrsetbits(endian, bits, addr, clear, set) \
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write##bits(addr, cpu_to_##endian##bits((endian##bits##_to_cpu( \
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read##bits(addr)) & ~((uint##bits##_t)(clear))) | (set)))
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#define clrbits_le64(addr, clear) __clrsetbits(le, 64, addr, clear, 0)
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#define clrbits_be64(addr, clear) __clrsetbits(be, 64, addr, clear, 0)
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#define clrbits_le32(addr, clear) __clrsetbits(le, 32, addr, clear, 0)
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#define clrbits_be32(addr, clear) __clrsetbits(be, 32, addr, clear, 0)
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#define clrbits_le16(addr, clear) __clrsetbits(le, 16, addr, clear, 0)
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#define clrbits_be16(addr, clear) __clrsetbits(be, 16, addr, clear, 0)
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#define setbits_le64(addr, set) __clrsetbits(le, 64, addr, 0, set)
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#define setbits_be64(addr, set) __clrsetbits(be, 64, addr, 0, set)
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#define setbits_le32(addr, set) __clrsetbits(le, 32, addr, 0, set)
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#define setbits_be32(addr, set) __clrsetbits(be, 32, addr, 0, set)
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#define setbits_le16(addr, set) __clrsetbits(le, 16, addr, 0, set)
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#define setbits_be16(addr, set) __clrsetbits(be, 16, addr, 0, set)
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#define clrsetbits_le64(addr, clear, set) __clrsetbits(le, 64, addr, clear, set)
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#define clrsetbits_be64(addr, clear, set) __clrsetbits(be, 64, addr, clear, set)
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#define clrsetbits_le32(addr, clear, set) __clrsetbits(le, 32, addr, clear, set)
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#define clrsetbits_be32(addr, clear, set) __clrsetbits(be, 32, addr, clear, set)
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#define clrsetbits_le16(addr, clear, set) __clrsetbits(le, 16, addr, clear, set)
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#define clrsetbits_be16(addr, clear, set) __clrsetbits(be, 16, addr, clear, set)
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#define clrsetbits_8(addr, clear, set) \
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write8(addr, (read8(addr) & ~(clear)) | (set))
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#define clrbits_8(addr, clear) clrsetbits_8(addr, clear, 0)
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#define setbits_8(addr, set) setbits_8(addr, 0, set)
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#ifndef __ROMCC__
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/*
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* Portable (API) endian support that can be used in code that is shared
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* with userspace (man 3 endian) tools.
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*/
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static inline uint16_t htobe16(uint16_t host_16bits)
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{
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return cpu_to_be16(host_16bits);
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}
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static inline uint16_t htole16(uint16_t host_16bits)
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{
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return cpu_to_le16(host_16bits);
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}
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static inline uint16_t be16toh(uint16_t big_endian_16bits)
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{
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return be16_to_cpu(big_endian_16bits);
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}
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static inline uint16_t le16toh(uint16_t little_endian_16bits)
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{
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return le16_to_cpu(little_endian_16bits);
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}
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static inline uint32_t htobe32(uint32_t host_32bits)
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{
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return cpu_to_be32(host_32bits);
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}
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static inline uint32_t htole32(uint32_t host_32bits)
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{
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return cpu_to_le32(host_32bits);
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}
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static inline uint32_t be32toh(uint32_t big_endian_32bits)
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{
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return be32_to_cpu(big_endian_32bits);
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}
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static inline uint32_t le32toh(uint32_t little_endian_32bits)
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{
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return le32_to_cpu(little_endian_32bits);
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}
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static inline uint64_t htobe64(uint64_t host_64bits)
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{
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return cpu_to_be64(host_64bits);
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}
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static inline uint64_t htole64(uint64_t host_64bits)
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{
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return cpu_to_le64(host_64bits);
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}
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static inline uint64_t be64toh(uint64_t big_endian_64bits)
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{
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return be64_to_cpu(big_endian_64bits);
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}
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static inline uint64_t le64toh(uint64_t little_endian_64bits)
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{
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return le16_to_cpu(little_endian_64bits);
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}
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#endif
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#endif
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