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Diffstat (limited to 'include/platform.h')
| -rw-r--r-- | include/platform.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/include/platform.h b/include/platform.h new file mode 100644 index 000000000..d15082f02 --- /dev/null +++ b/include/platform.h @@ -0,0 +1,117 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2009 Carl-Daniel Hailfinger + * Copyright (C) 2022 secunet Security Networks AG + * (written by Thomas Heijligen <thomas.heijligen@secunet.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* + * Header file for platform abstraction. + */ + +#ifndef __PLATFORM_H__ +#define __PLATFORM_H__ 1 + +#include <stddef.h> +#include <stdint.h> + +/* swap bytes */ +/* OpenBSD has conflicting definitions for swapX and __swapX */ +static inline uint8_t ___swap8(const uint8_t value) +{ + return (value & (uint8_t)0xffU); +} + +static inline uint16_t ___swap16(const uint16_t value) +{ + return ((value & (uint16_t)0x00ffU) << 8) | + ((value & (uint16_t)0xff00U) >> 8); +} + +static inline uint32_t ___swap32(const uint32_t value) +{ + return ((value & (uint32_t)0x000000ffUL) << 24) | + ((value & (uint32_t)0x0000ff00UL) << 8) | + ((value & (uint32_t)0x00ff0000UL) >> 8) | + ((value & (uint32_t)0xff000000UL) >> 24); +} + +static inline uint64_t ___swap64(const uint64_t value) +{ + return ((value & (uint64_t)0x00000000000000ffULL) << 56) | + ((value & (uint64_t)0x000000000000ff00ULL) << 40) | + ((value & (uint64_t)0x0000000000ff0000ULL) << 24) | + ((value & (uint64_t)0x00000000ff000000ULL) << 8) | + ((value & (uint64_t)0x000000ff00000000ULL) >> 8) | + ((value & (uint64_t)0x0000ff0000000000ULL) >> 24) | + ((value & (uint64_t)0x00ff000000000000ULL) >> 40) | + ((value & (uint64_t)0xff00000000000000ULL) >> 56); +} + +/* + * macro to return the same value as passed. + * + * `___return_same(cpu_to_le, 8)` + * expands to + * `uint8_t cpu_to_le8 (const uint8_t value) { return value; }` + */ +#define ___return_same(name, bits) \ + uint##bits##_t name##bits (const uint##bits##_t value) { return value; } + +/* + * macro to return the swapped value as passed. + * + * `___return_swapped(cpu_to_be, 8)` + * expands to + * `uint8_t cpu_to_be8 (const uint8_t value) { return ___swap8 (value); }` + */ +#define ___return_swapped(name, bits) \ + uint##bits##_t name##bits (const uint##bits##_t value) { return ___swap##bits (value); } + +/* convert cpu native endian to little endian */ +uint8_t cpu_to_le8 (uint8_t value); +uint16_t cpu_to_le16(uint16_t value); +uint32_t cpu_to_le32(uint32_t value); +uint64_t cpu_to_le64(uint64_t value); + +/* convert cpu native endian to big endian */ +uint8_t cpu_to_be8 (uint8_t value); +uint16_t cpu_to_be16(uint16_t value); +uint32_t cpu_to_be32(uint32_t value); +uint64_t cpu_to_be64(uint64_t value); + +/* convert little endian to cpu native endian */ +uint8_t le_to_cpu8 (uint8_t value); +uint16_t le_to_cpu16(uint16_t value); +uint32_t le_to_cpu32(uint32_t value); +uint64_t le_to_cpu64(uint64_t value); + +/* convert big endian to cpu native endian */ +uint8_t be_to_cpu8 (uint8_t value); +uint16_t be_to_cpu16(uint16_t value); +uint32_t be_to_cpu32(uint32_t value); +uint64_t be_to_cpu64(uint64_t value); + +/* read value from base at offset in little endian */ +uint8_t read_le8 (const void *base, size_t offset); +uint16_t read_le16(const void *base, size_t offset); +uint32_t read_le32(const void *base, size_t offset); +uint64_t read_le64(const void *base, size_t offset); + +/* read value from base at offset in big endian */ +uint8_t read_be8 (const void *base, size_t offset); +uint16_t read_be16(const void *base, size_t offset); +uint32_t read_be32(const void *base, size_t offset); +uint64_t read_be64(const void *base, size_t offset); + +#endif /* !__PLATFORM_H__ */ |