1/*-
2 * Copyright (c) 2013-2015 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
9 *    notice, this list of conditions and the following disclaimer
10 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * $FreeBSD$
27 */
28
29
30#ifndef UNIT_TEST_H_INCLUDED
31#define	UNIT_TEST_H_INCLUDED
32
33#ifdef _KERNEL
34#error "Random unit tests cannot be compiled into the kernel."
35#endif
36
37#include <sys/types.h>
38#include <inttypes.h>
39#include <stdint.h>
40
41#if defined(clang) && __has_builtin(__builtin_readcyclecounter)
42#define	rdtsc __builtin_readcyclecounter
43#else /* !clang */
44#if defined(__amd64__) || defined(__i386__)
45static __inline uint64_t
46rdtsc(void)
47{
48	uint32_t low, high;
49
50	__asm __volatile("rdtsc" : "=a" (low), "=d" (high));
51	return (low | ((uint64_t)high << 32));
52}
53#else /* __amd64__ || __i386__ */
54#error "No rdtsc() implementation available."
55#endif /* __amd64__ || __i386__ */
56#endif /* !clang */
57
58static __inline uint64_t
59get_cyclecount(void)
60{
61
62	return (rdtsc());
63}
64
65#define	HARVESTSIZE	2
66#define RANDOM_BLOCKSIZE	16
67
68enum random_entropy_source {
69	RANDOM_START = 0,
70	RANDOM_CACHED = 0,
71	ENTROPYSOURCE = 32
72};
73
74struct harvest_event {
75	uintmax_t			he_somecounter;		/* fast counter for clock jitter */
76	uint32_t			he_entropy[HARVESTSIZE];/* some harvested entropy */
77	u_int				he_size;		/* harvested entropy byte count */
78	u_int				he_bits;		/* stats about the entropy */
79	u_int				he_destination;		/* destination pool of this entropy */
80	enum random_entropy_source	he_source;		/* origin of the entropy */
81	void *				he_next;		/* next item on the list */
82};
83
84struct sysctl_ctx_list;
85
86#define	CTASSERT(x)	_Static_assert(x, "compile-time assertion failed")
87#define	KASSERT(exp,msg) do {	\
88	if (!(exp)) {		\
89		printf msg;	\
90		exit(0);	\
91	}			\
92} while (0)
93
94#endif /* UNIT_TEST_H_INCLUDED */
95