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author | Rahul Pathak <rpathak@ventanamicro.com> | 2023-02-02 07:44:25 +0300 |
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committer | Anup Patel <anup@brainfault.org> | 2023-02-08 15:40:39 +0300 |
commit | 09b34d8cca513dbd4d52ffd6d3d5b6dedeea516b (patch) | |
tree | 5f3ff0761f95a468e66fd2ee4de2a9512e920c9d /include | |
parent | 642f3de9b947b747a4fe0eaae348f1c55f1ac409 (diff) | |
download | opensbi-09b34d8cca513dbd4d52ffd6d3d5b6dedeea516b.tar.xz |
include: Add support for byteorder/endianness conversion
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>
Diffstat (limited to 'include')
-rw-r--r-- | include/sbi/sbi_byteorder.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/include/sbi/sbi_byteorder.h b/include/sbi/sbi_byteorder.h new file mode 100644 index 0000000..680710f --- /dev/null +++ b/include/sbi/sbi_byteorder.h @@ -0,0 +1,57 @@ +/* + * 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__ */ |