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029dd14e72
The BL3-1 firmware code is stored in TZSRAM on Tegra194 platforms. This memory loses power when we enter System Suspend and so its contents are stored to TZDRAM, before entry. This opens up an attack vector where the TZDRAM contents might be tampered with when we are in the System Suspend mode. To mitigate this attack the SE engine calculates the hash of entire TZSRAM and stores it in PMC scratch, before we copy data to TZDRAM. The WB0 code will validate the TZDRAM and match the hash with the one in PMC scratch. This patch adds driver for the SE engine, with APIs to calculate the hash and store to PMC scratch registers. Change-Id: I04cc0eb7f54c69d64b6c34fc2ff62e4cfbdd43b2 Signed-off-by: Jeetesh Burman <jburman@nvidia.com>
16 lines
317 B
C
16 lines
317 B
C
/*
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* Copyright (c) 2019-2020, 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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#ifndef SE_H
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#define SE_H
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int32_t tegra_se_calculate_save_sha256(uint64_t src_addr,
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uint32_t src_len_inbyte);
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int32_t tegra_se_suspend(void);
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void tegra_se_resume(void);
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#endif /* SE_H */
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