1/*-
2 * Copyright (c) 2000 Mark R V Murray
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/random/randomdev.c 111815 2003-03-03 12:15:54Z phk $
27 */
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/bus.h>
32#include <sys/conf.h>
33#include <sys/fcntl.h>
34#include <sys/filio.h>

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57static d_write_t random_write;
58static d_ioctl_t random_ioctl;
59static d_poll_t random_poll;
60
61#define CDEV_MAJOR 2
62#define RANDOM_MINOR 3
63
64static struct cdevsw random_cdevsw = {
65 .d_open = random_open,
66 .d_close = random_close,
67 .d_read = random_read,
68 .d_write = random_write,
69 .d_ioctl = random_ioctl,
70 .d_poll = random_poll,
71 .d_name = "random",
72 .d_maj = CDEV_MAJOR,
73};
74
75static void random_kthread(void *);
76static void random_harvest_internal(u_int64_t, void *, u_int, u_int, u_int, enum esource);
77static void random_write_internal(void *, int);
78
79/* Ring buffer holding harvested entropy */
80static struct harvestring {

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