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4cbf0cc358
Add a driver for the STM32 True Random Number Generator. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=none BUG=chrome-os-partner:62991 TEST=adhoc on STM32L, craft console command and generate/dump buffers of random numbers. Change-Id: Ie7ce890cfc36a3b9a277715b17051e3e42fdfc96 Reviewed-on: https://chromium-review.googlesource.com/445777 Commit-Ready: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Shawn N <shawnn@chromium.org>
43 lines
883 B
C
43 lines
883 B
C
/* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef __EC_INCLUDE_TRNG_H
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#define __EC_INCLUDE_TRNG_H
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#include <stddef.h>
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#include <stdint.h>
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/**
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* Initialize the true random number generator.
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*
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* Not supported by all platforms.
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**/
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void init_trng(void);
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/**
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* Shutdown the true random number generator.
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*
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* The opposite operation of init_trng(), disable the hardware resources
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* used by the TRNG to save power.
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*
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* Not supported by all platforms.
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**/
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void exit_trng(void);
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/**
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* Retrieve a 32 bit random value.
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*
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* Not supported on all platforms.
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**/
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uint32_t rand(void);
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/**
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* Output len random bytes into buffer.
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*
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* Not supported on all platforms.
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**/
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void rand_bytes(void *buffer, size_t len);
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#endif /* __EC_INCLUDE_TRNG_H */
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