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
27
28#ifndef UNIT_TEST_H_INCLUDED
29#define	UNIT_TEST_H_INCLUDED
30
31#ifdef _KERNEL
32#error "Random unit tests cannot be compiled into the kernel."
33#endif
34
35#include <sys/types.h>
36#include <inttypes.h>
37#include <stdint.h>
38
39#if defined(clang) && __has_builtin(__builtin_readcyclecounter)
40#define	rdtsc __builtin_readcyclecounter
41#else /* !clang */
42#if defined(__amd64__) || defined(__i386__)
43static __inline uint64_t
44rdtsc(void)
45{
46	uint32_t low, high;
47
48	__asm __volatile("rdtsc" : "=a" (low), "=d" (high));
49	return (low | ((uint64_t)high << 32));
50}
51#else /* __amd64__ || __i386__ */
52#error "No rdtsc() implementation available."
53#endif /* __amd64__ || __i386__ */
54#endif /* !clang */
55
56static __inline uint64_t
57get_cyclecount(void)
58{
59
60	return (rdtsc());
61}
62
63#define	HARVESTSIZE	2
64#define RANDOM_BLOCKSIZE	16
65
66enum random_entropy_source {
67	RANDOM_START = 0,
68	RANDOM_CACHED = 0,
69	ENTROPYSOURCE = 32
70};
71
72struct harvest_event {
73	uintmax_t			he_somecounter;		/* fast counter for clock jitter */
74	uint32_t			he_entropy[HARVESTSIZE];/* some harvested entropy */
75	uint8_t				he_size;		/* harvested entropy byte count */
76	uint8_t				he_destination;		/* destination pool of this entropy */
77	enum random_entropy_source	he_source;		/* origin of the entropy */
78	void *				he_next;		/* next item on the list */
79};
80
81struct sysctl_ctx_list;
82
83#define	CTASSERT(x)	_Static_assert(x, "compile-time assertion failed")
84#define	KASSERT(exp,msg) do {	\
85	if (!(exp)) {		\
86		printf msg;	\
87		exit(0);	\
88	}			\
89} while (0)
90
91#endif /* UNIT_TEST_H_INCLUDED */
92