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include: Add support for byteorder/endianness conversion

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Define macros general byteorder conversion
Define functions for endianness conversion
from general byteorder conversion macros

Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Sergey Matyukevich <sergey.matyukevich@syntacore.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Rahul Pathak 2023-02-02 10:14:25 +05:30 • committed by Anup Patel
parent 642f3de9b9
commit 09b34d8cca
1 changed files with 57 additions and 0 deletions
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include/sbi/sbi_byteorder.h Normal file
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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2023 Ventana Micro Systems Inc.
*/
#ifndef __SBI_BYTEORDER_H__
#define __SBI_BYTEORDER_H__
#include <sbi/sbi_types.h>
#define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n])
#define BSWAP16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
#define BSWAP32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
(EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
#define BSWAP64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
(EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
(EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
(EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ /* CPU(little-endian) */
#define cpu_to_be16(x) ((uint16_t)BSWAP16(x))
#define cpu_to_be32(x) ((uint32_t)BSWAP32(x))
#define cpu_to_be64(x) ((uint64_t)BSWAP64(x))
#define be16_to_cpu(x) ((uint16_t)BSWAP16(x))
#define be32_to_cpu(x) ((uint32_t)BSWAP32(x))
#define be64_to_cpu(x) ((uint64_t)BSWAP64(x))
#define cpu_to_le16(x) ((uint16_t)(x))
#define cpu_to_le32(x) ((uint32_t)(x))
#define cpu_to_le64(x) ((uint64_t)(x))
#define le16_to_cpu(x) ((uint16_t)(x))
#define le32_to_cpu(x) ((uint32_t)(x))
#define le64_to_cpu(x) ((uint64_t)(x))
#else /* CPU(big-endian) */
#define cpu_to_be16(x) ((uint16_t)(x))
#define cpu_to_be32(x) ((uint32_t)(x))
#define cpu_to_be64(x) ((uint64_t)(x))
#define be16_to_cpu(x) ((uint16_t)(x))
#define be32_to_cpu(x) ((uint32_t)(x))
#define be64_to_cpu(x) ((uint64_t)(x))
#define cpu_to_le16(x) ((uint16_t)BSWAP16(x))
#define cpu_to_le32(x) ((uint32_t)BSWAP32(x))
#define cpu_to_le64(x) ((uint64_t)BSWAP64(x))
#define le16_to_cpu(x) ((uint16_t)BSWAP16(x))
#define le32_to_cpu(x) ((uint32_t)BSWAP32(x))
#define le64_to_cpu(x) ((uint64_t)BSWAP64(x))
#endif
#endif /* __SBI_BYTEORDER_H__ */