/*
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* bcmrand.h.
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*
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* Copyright (C) 2020, Broadcom.
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2 (the "GPL"),
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* available at http://www.broadcom.com/licenses/GPLv2.php, with the
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* following added to such license:
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*
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* As a special exception, the copyright holders of this software give you
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* permission to link this software with independent modules, and to copy and
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* distribute the resulting executable under terms of your choice, provided that
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* you also meet, for each linked independent module, the terms and conditions of
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* the license of that module. An independent module is a module which is not
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* derived from this software. The special exception does not apply to any
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* modifications of the software.
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*
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*
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* <<Broadcom-WL-IPTag/Dual:>>
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*/
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#ifndef _bcmrand_h_
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#define _bcmrand_h_
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/* When HOST driver is for PCIE dongle image, we suppose the HOST must provide the entropy
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* input if it does not define the macro BCM_RNG_NO_HOST_ENTROPY
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*/
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#if defined(BCMPCIEDEV) && !defined(BCMFUZZ)
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#if !defined(BCM_RNG_HOST_ENTROPY) && !defined(BCM_RNG_NO_HOST_ENTROPY)
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#define BCM_RNG_HOST_ENTROPY
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#define BCM_RNG_PCIEDEV_DEFAULT
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#endif /* !BCM_RNG_HOST_ENTROPY && !BCM_RNG_NO_HOST_ENTROPY */
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#endif /* BCMPCIEDEV */
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/* the format of current TCM layout during boot
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*
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* Code Unused memory Random numbers Random number Magic number NVRAM NVRAM
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* byte Count 0xFEEDC0DE Size
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* |<-----Variable---->|<---Variable--->|<-----4 bytes-->|<---4 bytes---->|<---V--->|<--4B--->|
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* |<------------- BCM_ENTROPY_HOST_MAXSIZE --------->|
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*/
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/* The HOST need to provided 64 bytes (512 bits) entropy for the bcm SW RNG */
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#define BCM_ENTROPY_MAGIC_SIZE 4u
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#define BCM_ENTROPY_COUNT_SIZE 4u
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#define BCM_ENTROPY_SEED_NBYTES 64u
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#define BCM_ENTROPY_NONCE_NBYTES 16u
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#define BCM_ENTROPY_HOST_NBYTES 128u
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#ifdef DBG_RNG_SEC_TEST
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#define BCM_ENTROPY_MAX_NBYTES 128u
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#else
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#define BCM_ENTROPY_MAX_NBYTES 512u
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#endif /* DBG_RNG_SEC_TEST */
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#define BCM_ENTROPY_HOST_MAXSIZE \
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(BCM_ENTROPY_MAGIC_SIZE + BCM_ENTROPY_COUNT_SIZE + BCM_ENTROPY_MAX_NBYTES)
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/* Constant for calculate the location of host entropy input */
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#define BCM_NVRAM_OFFSET_TCM 4u
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#define BCM_NVRAM_IMG_COMPRS_FACTOR 4u
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#define BCM_NVRAM_RNG_SIGNATURE 0xFEEDC0DEu
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#endif /* _bcmrand_h_ */
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