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Endian conversion: move to platform.h and platform/endian*.c

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Starting to move the platform dependent code to platform/ and provide
the abstraction through the platform.h header.

Change-Id: I35640282d451960f2a329ae24339ec05dbae6d30
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/62899
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Thomas Heijligen
2022-03-17 13:41:17 +01:00
committed by Nico Huber
parent 6272c71fbb
commit b1db7e4367
6 changed files with 12 additions and 11 deletions
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103
platform.h Normal file
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/*
* 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 <stdint.h>
/* swap bytes */
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 (const uint8_t value);
uint16_t cpu_to_le16(const uint16_t value);
uint32_t cpu_to_le32(const uint32_t value);
uint64_t cpu_to_le64(const uint64_t value);
/* convert cpu native endian to big endian */
uint8_t cpu_to_be8 (const uint8_t value);
uint16_t cpu_to_be16(const uint16_t value);
uint32_t cpu_to_be32(const uint32_t value);
uint64_t cpu_to_be64(const uint64_t value);
/* convert little endian to cpu native endian */
uint8_t le_to_cpu8 (const uint8_t value);
uint16_t le_to_cpu16(const uint16_t value);
uint32_t le_to_cpu32(const uint32_t value);
uint64_t le_to_cpu64(const uint64_t value);
/* convert big endian to cpu native endian */
uint8_t be_to_cpu8 (const uint8_t value);
uint16_t be_to_cpu16(const uint16_t value);
uint32_t be_to_cpu32(const uint32_t value);
uint64_t be_to_cpu64(const uint64_t value);
#endif /* !__PLATFORM_H__ */