77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** @file
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*
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* Entropy sampling
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*
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*/
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#include <stdio.h>
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#include <ipxe/entropy.h>
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#include <ipxe/test.h>
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/** Total number of test samples */
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#define SAMPLE_COUNT 65536
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/** Number of samples per block */
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#define SAMPLE_BLOCKSIZE 256
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/**
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* Generate entropy samples for external testing
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*
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*/
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static void entropy_sample_test_exec ( void ) {
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static noise_sample_t samples[SAMPLE_BLOCKSIZE];
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unsigned int i;
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unsigned int j;
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int rc;
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/* Collect and print blocks of samples */
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for ( i = 0 ; i < ( SAMPLE_COUNT / SAMPLE_BLOCKSIZE ) ; i++ ) {
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/* Collect one block of samples */
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rc = entropy_enable();
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ok ( rc == 0 );
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for ( j = 0 ; j < SAMPLE_BLOCKSIZE ; j++ ) {
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rc = get_noise ( &samples[j] );
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ok ( rc == 0 );
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}
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entropy_disable();
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/* Print out sample values */
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for ( j = 0 ; j < SAMPLE_BLOCKSIZE ; j++ ) {
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printf ( "SAMPLE %d %d\n", ( i * SAMPLE_BLOCKSIZE + j ),
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samples[j] );
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}
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}
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}
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/** Entropy sampling self-test */
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struct self_test entropy_sample_test __self_test = {
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.name = "entropy_sample",
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.exec = entropy_sample_test_exec,
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};
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