mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
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7dfb99118e
This adds the TRNG Firmware Interface Service to the standard service dispatcher. This includes a method for dispatching entropy requests to platforms and includes an entropy pool implementation to avoid dropping any entropy requested from the platform. Change-Id: I71cadb3cb377a507652eca9e0d68714c973026e9 Signed-off-by: Jimmy Brisson <jimmy.brisson@arm.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
/*
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* Copyright (c) 2021, ARM Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef TRNG_SVC_H
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#define TRNG_SVC_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <lib/smccc.h>
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/* SMC function IDs for TRNG queries */
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#define ARM_TRNG_VERSION U(0x84000050)
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#define ARM_TRNG_FEATURES U(0x84000051)
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#define ARM_TRNG_GET_UUID U(0x84000052)
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#define ARM_TRNG_RND32 U(0x84000053)
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#define ARM_TRNG_RND64 U(0xc4000053)
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/* TRNG version numbers */
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#define TRNG_VERSION_MAJOR (0x1)
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#define TRNG_VERSION_MINOR (0x0)
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/* TRNG Error Numbers */
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#define TRNG_E_SUCCESS (0)
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#define TRNG_E_NOT_SUPPORTED (-1)
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#define TRNG_E_INVALID_PARAMS (-2)
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#define TRNG_E_NO_ENTROPY (-3)
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#define TRNG_E_NOT_IMPLEMENTED (-4)
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#if TRNG_SUPPORT
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void trng_setup(void);
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bool is_trng_fid(uint32_t smc_fid);
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#else
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static inline void trng_setup(void)
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{
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}
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static inline bool is_trng_fid(uint32_t smc_fid)
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{
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return false;
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}
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#endif
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uintptr_t trng_smc_handler(
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uint32_t smc_fid,
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u_register_t x1,
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u_register_t x2,
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u_register_t x3,
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u_register_t x4,
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void *cookie,
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void *handle,
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u_register_t flags
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);
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#endif /* TRNG_SVC_H */
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