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eb18ce3283
The Juno Trusted Entropy Source has a bias, which makes the generated raw numbers fail a FIPS 140-2 statistic test. To improve the quality of the numbers, we can use the CPU's CRC instructions, which do a decent job on conditioning the bits. This adds a *very* simple version of arm_acle.h, which is typically provided by the compiler, and contains the CRC instrinsics definitions we need. We need the original version by using -nostdinc. Change-Id: I83d3e6902d6a1164aacd5060ac13a38f0057bd1a Signed-off-by: Andre Przywara <andre.przywara@arm.com>
22 lines
542 B
C
22 lines
542 B
C
/*
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* Copyright (c) 2021 ARM Limited
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* The definitions below are a subset of what we would normally get by using
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* the compiler's version of arm_acle.h. We can't use that directly because
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* we specify -nostdinc in the Makefiles.
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*
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* We just define the functions we need so far.
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*/
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#ifndef ARM_ACLE_H
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#define ARM_ACLE_H
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#if !defined(__aarch64__) || defined(__clang__)
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# define __crc32w __builtin_arm_crc32w
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#else
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# define __crc32w __builtin_aarch64_crc32w
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#endif
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#endif /* ARM_ACLE_H */
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