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: releng/12.2/sys/dev/random/unit_test.h 338324 2018-08-26 12:51:46Z markm $
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 #ifndef __LITEOS__
42 #if defined(clang) && __has_builtin(__builtin_readcyclecounter)
43 #define rdtsc __builtin_readcyclecounter
44 #else /* !clang */
45 #if defined(__amd64__) || defined(__i386__)
46 static __inline uint64_t
rdtsc(void)47 rdtsc(void)
48 {
49 uint32_t low, high;
50
51 __asm __volatile("rdtsc" : "=a" (low), "=d" (high));
52 return (low | ((uint64_t)high << 32));
53 }
54 #else /* __amd64__ || __i386__ */
55 #error "No rdtsc() implementation available."
56 #endif /* __amd64__ || __i386__ */
57 #endif /* !clang */
58 #endif
59
60 static __inline uint64_t
get_cyclecount(void)61 get_cyclecount(void)
62 {
63 #ifndef __LITEOS__
64 return (rdtsc());
65 #else
66 return 0;
67 #endif
68 }
69
70 #define HARVESTSIZE 2
71 #define RANDOM_BLOCKSIZE 16
72
73 enum random_entropy_source {
74 RANDOM_START = 0,
75 RANDOM_CACHED = 0,
76 ENTROPYSOURCE = 32
77 };
78
79 struct harvest_event {
80 uintmax_t he_somecounter; /* fast counter for clock jitter */
81 uint32_t he_entropy[HARVESTSIZE];/* some harvested entropy */
82 u_int he_size; /* harvested entropy byte count */
83 u_int he_bits; /* stats about the entropy */
84 u_int he_destination; /* destination pool of this entropy */
85 enum random_entropy_source he_source; /* origin of the entropy */
86 void * he_next; /* next item on the list */
87 };
88
89 struct sysctl_ctx_list;
90
91 #define CTASSERT(x) _Static_assert(x, "compile-time assertion failed")
92 #define KASSERT(exp,msg) do { \
93 if (!(exp)) { \
94 printf msg; \
95 exit(0); \
96 } \
97 } while (0)
98
99 #endif /* UNIT_TEST_H_INCLUDED */
100