29 lines
663 B
C
29 lines
663 B
C
/*
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* Copyright (c) 2020, NVIDIA Corporation. 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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#include <stdint.h>
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#include <arch_helpers.h>
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#include <lib/mmio.h>
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#include <plat/common/platform.h>
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#include <platform_def.h>
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u_register_t plat_get_stack_protector_canary(void)
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{
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u_register_t seed;
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/*
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* Ideally, a random number should be returned instead. As the
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* platform does not have any random number generator, this is
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* better than nothing, but not really secure.
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*/
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seed = mmio_read_32(TEGRA_MISC_BASE + HARDWARE_REVISION_OFFSET);
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seed <<= 32;
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seed |= mmio_read_32(TEGRA_TMRUS_BASE);
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return seed ^ read_cntpct_el0();
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}
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