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 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 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