2 * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 FILE_LICENCE ( GPL2_OR_LATER );
29 #include <ipxe/entropy.h>
30 #include <ipxe/test.h>
32 /** Total number of test samples */
33 #define SAMPLE_COUNT 65536
35 /** Number of samples per block */
36 #define SAMPLE_BLOCKSIZE 256
39 * Generate entropy samples for external testing
42 static void entropy_sample_test_exec ( void ) {
43 static noise_sample_t samples[SAMPLE_BLOCKSIZE];
48 /* Collect and print blocks of samples */
49 for ( i = 0 ; i < ( SAMPLE_COUNT / SAMPLE_BLOCKSIZE ) ; i++ ) {
51 /* Collect one block of samples */
52 rc = entropy_enable();
54 for ( j = 0 ; j < SAMPLE_BLOCKSIZE ; j++ ) {
55 rc = get_noise ( &samples[j] );
60 /* Print out sample values */
61 for ( j = 0 ; j < SAMPLE_BLOCKSIZE ; j++ ) {
62 printf ( "SAMPLE %d %d\n", ( i * SAMPLE_BLOCKSIZE + j ),
68 /** Entropy sampling self-test */
69 struct self_test entropy_sample_test __self_test = {
70 .name = "entropy_sample",
71 .exec = entropy_sample_test_exec,