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82604bd738
Add functions like `uint32_t read_le32(const void *base, size_t offset);` Read a 32 bit unsigned from a base with an offset. Having prototypes and a macro generated implementation makes it easier to read, understand and spot errors in one of them. Change-Id: Idde177acf8bc5f94cd046b6539dc31532c98e452 Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/31016 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Nico Huber <nico.h@gmx.de>
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2016 secunet Security Networks AG
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* (written by Thomas Heijligen <thomas.heijligen@secunet.com>)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "../platform.h"
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/*
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* macro to return endian aware read function
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*
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* `___read(le, 8)`
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* expands to
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* `uint8_t read_le8 (const void *const base, const size_t offset)
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* { return le_to_cpu8 (*(uint8_t *)((uintptr_t)base + offset)); }`
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*/
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#define ___read(endian, bits) \
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uint##bits##_t read_##endian##bits (const void *const base, const size_t offset) \
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{ return endian##_to_cpu##bits (*(uint##bits##_t *)((uintptr_t)base + offset)); }
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/* read value from base at offset in little endian */
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___read(le, 8)
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___read(le, 16)
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___read(le, 32)
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___read(le, 64)
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/* read value from base at offset in big endian */
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___read(be, 8)
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___read(be, 16)
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___read(be, 32)
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___read(be, 64)
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