e8e92d60c4
Libpayload has a family of functions that can "encode" or "decode" an endian-specific integer onto a byte stream pointer. These allow writing more pretty code than a raw be32_to_cpu/cpu_to_be32 with pointer casts in many (de-)serialization scenarios, so let's add them to coreboot as well. Change-Id: I049c5665484da12b3cf977a529310b0bde177d2d Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32856 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
179 lines
5.6 KiB
C
179 lines
5.6 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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#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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/* be16dec/be32dec/be64dec/le16dec/le32dec/le64dec family of functions. */
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#define DEFINE_ENDIAN_DEC(endian, width) \
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static inline uint##width##_t endian##width##dec(const void *p) \
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{ \
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return endian##width##_to_cpu(*(uint##width##_t *)p); \
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}
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DEFINE_ENDIAN_DEC(be, 16)
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DEFINE_ENDIAN_DEC(be, 32)
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DEFINE_ENDIAN_DEC(be, 64)
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DEFINE_ENDIAN_DEC(le, 16)
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DEFINE_ENDIAN_DEC(le, 32)
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DEFINE_ENDIAN_DEC(le, 64)
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/* be16enc/be32enc/be64enc/le16enc/le32enc/le64enc family of functions. */
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#define DEFINE_ENDIAN_ENC(endian, width) \
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static inline void endian##width##enc(void *p, uint##width##_t u) \
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{ \
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*(uint##width##_t *)p = cpu_to_##endian##width(u); \
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}
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DEFINE_ENDIAN_ENC(be, 16)
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DEFINE_ENDIAN_ENC(be, 32)
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DEFINE_ENDIAN_ENC(be, 64)
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DEFINE_ENDIAN_ENC(le, 16)
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DEFINE_ENDIAN_ENC(le, 32)
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DEFINE_ENDIAN_ENC(le, 64)
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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 le64_to_cpu(little_endian_64bits);
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}
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#endif
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#endif
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