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https://github.com/ARM-software/arm-trusted-firmware.git
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0b22e59103
This patch adds the following changes to complete the existing TRNG implementation: 1. Adds a feature specific scope for buildlog generation. 2. Updates the docs on the build flag "TRNG_SUPPORT" and its values. 3. Makefile update and improves the existing comments at few sections for better understanding of the underlying logic. Change-Id: I3f72f0ccd5c94005a2df87158cf23199d2160d37 Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/*
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* Copyright (c) 2021-2022, 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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/* TRNG Entropy Bit Numbers */
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#define TRNG_RND32_ENTROPY_MAXBITS (96U)
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#define TRNG_RND64_ENTROPY_MAXBITS (192U)
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/* Public API to perform the initial TRNG entropy setup */
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void trng_setup(void);
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/* Public API to verify function id is part of TRNG */
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bool is_trng_fid(uint32_t smc_fid);
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/* Handler to be called to handle TRNG smc calls */
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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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