From 09b34d8cca513dbd4d52ffd6d3d5b6dedeea516b Mon Sep 17 00:00:00 2001 From: Rahul Pathak Date: Thu, 2 Feb 2023 10:14:25 +0530 Subject: 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 Reviewed-by: Xiang W Reviewed-by: Sergey Matyukevich Reviewed-by: Anup Patel --- include/sbi/sbi_byteorder.h | 57 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 include/sbi/sbi_byteorder.h 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 + +#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__ */ -- cgit v1.2.3