1 | /*- |
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2 | * Copyright (c) 1982, 1988, 1991, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * (c) UNIX System Laboratories, Inc. |
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5 | * All or some portions of this file are derived from material licensed |
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6 | * to the University of California by American Telephone and Telegraph |
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7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
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8 | * the permission of UNIX System Laboratories, Inc. |
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9 | * |
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10 | * Redistribution and use in source and binary forms, with or without |
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11 | * modification, are permitted provided that the following conditions |
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12 | * are met: |
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13 | * 1. Redistributions of source code must retain the above copyright |
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14 | * notice, this list of conditions and the following disclaimer. |
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15 | * 2. Redistributions in binary form must reproduce the above copyright |
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16 | * notice, this list of conditions and the following disclaimer in the |
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17 | * documentation and/or other materials provided with the distribution. |
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18 | * 4. Neither the name of the University nor the names of its contributors |
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19 | * may be used to endorse or promote products derived from this software |
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20 | * without specific prior written permission. |
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21 | * |
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22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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32 | * SUCH DAMAGE. |
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33 | * |
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34 | * @(#)systm.h 8.7 (Berkeley) 3/29/95 |
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35 | * $FreeBSD$ |
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36 | */ |
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37 | |
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38 | #ifndef _SYS_SYSTM_H_ |
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39 | #define _SYS_SYSTM_H_ |
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40 | |
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41 | #include <machine/atomic.h> |
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42 | #include <machine/cpufunc.h> |
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43 | #include <sys/callout.h> |
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44 | #include <sys/cdefs.h> |
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45 | #include <sys/queue.h> |
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46 | #include <sys/stdint.h> /* for people using printf mainly */ |
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47 | |
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48 | #ifndef __rtems__ |
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49 | extern int cold; /* nonzero if we are doing a cold boot */ |
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50 | #else /* __rtems__ */ |
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51 | /* In RTEMS there is no cold boot */ |
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52 | #define cold 0 |
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53 | #endif /* __rtems__ */ |
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54 | extern int rebooting; /* boot() has been called. */ |
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55 | extern const char *panicstr; /* panic message */ |
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56 | extern char version[]; /* system version */ |
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57 | extern char copyright[]; /* system copyright */ |
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58 | extern int kstack_pages; /* number of kernel stack pages */ |
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59 | |
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60 | extern int nswap; /* size of swap space */ |
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61 | |
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62 | extern u_long pagesizes[]; /* supported page sizes */ |
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63 | extern long physmem; /* physical memory */ |
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64 | extern long realmem; /* 'real' memory */ |
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65 | |
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66 | extern char *rootdevnames[2]; /* names of possible root devices */ |
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67 | |
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68 | extern int boothowto; /* reboot flags, from console subsystem */ |
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69 | #ifndef __rtems__ |
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70 | extern int bootverbose; /* nonzero to print verbose messages */ |
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71 | #else /* __rtems__ */ |
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72 | #define bootverbose 0 /* XXX RTEMS doesn't support verbose */ |
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73 | #endif /* __rtems__ */ |
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74 | |
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75 | |
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76 | extern int maxusers; /* system tune hint */ |
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77 | extern int ngroups_max; /* max # of supplemental groups */ |
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78 | extern int vm_guest; /* Running as virtual machine guest? */ |
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79 | |
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80 | /* |
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81 | * Detected virtual machine guest types. The intention is to expand |
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82 | * and/or add to the VM_GUEST_VM type if specific VM functionality is |
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83 | * ever implemented (e.g. vendor-specific paravirtualization features). |
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84 | */ |
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85 | enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN }; |
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86 | |
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87 | #ifdef INVARIANTS /* The option is always available */ |
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88 | #define KASSERT(exp,msg) do { \ |
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89 | if (__predict_false(!(exp))) \ |
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90 | panic msg; \ |
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91 | } while (0) |
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92 | #define VNASSERT(exp, vp, msg) do { \ |
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93 | if (__predict_false(!(exp))) { \ |
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94 | vn_printf(vp, "VNASSERT failed\n"); \ |
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95 | panic msg; \ |
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96 | } \ |
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97 | } while (0) |
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98 | #else |
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99 | #define KASSERT(exp,msg) do { \ |
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100 | } while (0) |
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101 | |
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102 | #define VNASSERT(exp, vp, msg) do { \ |
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103 | } while (0) |
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104 | #endif |
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105 | |
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106 | #ifndef CTASSERT /* Allow lint to override */ |
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107 | #define CTASSERT(x) _CTASSERT(x, __LINE__) |
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108 | #define _CTASSERT(x, y) __CTASSERT(x, y) |
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109 | #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] |
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110 | #endif |
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111 | |
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112 | /* |
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113 | * Assert that a pointer can be loaded from memory atomically. |
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114 | * |
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115 | * This assertion enforces stronger alignment than necessary. For example, |
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116 | * on some architectures, atomicity for unaligned loads will depend on |
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117 | * whether or not the load spans multiple cache lines. |
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118 | */ |
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119 | #define ASSERT_ATOMIC_LOAD_PTR(var, msg) \ |
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120 | KASSERT(sizeof(var) == sizeof(void *) && \ |
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121 | ((uintptr_t)&(var) & (sizeof(void *) - 1)) == 0, msg) |
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122 | |
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123 | /* |
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124 | * XXX the hints declarations are even more misplaced than most declarations |
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125 | * in this file, since they are needed in one file (per arch) and only used |
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126 | * in two files. |
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127 | * XXX most of these variables should be const. |
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128 | */ |
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129 | extern int osreldate; |
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130 | extern int envmode; |
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131 | extern int hintmode; /* 0 = off. 1 = config, 2 = fallback */ |
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132 | extern int dynamic_kenv; |
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133 | extern struct mtx kenv_lock; |
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134 | extern char *kern_envp; |
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135 | extern char static_env[]; |
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136 | extern char static_hints[]; /* by config for now */ |
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137 | |
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138 | extern char **kenvp; |
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139 | |
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140 | /* |
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141 | * General function declarations. |
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142 | */ |
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143 | |
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144 | struct inpcb; |
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145 | struct lock_object; |
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146 | struct malloc_type; |
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147 | struct mtx; |
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148 | struct proc; |
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149 | struct socket; |
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150 | struct thread; |
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151 | struct tty; |
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152 | struct ucred; |
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153 | struct uio; |
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154 | struct _jmp_buf; |
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155 | |
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156 | #ifndef __rtems__ |
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157 | int setjmp(struct _jmp_buf *); |
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158 | void longjmp(struct _jmp_buf *, int) __dead2; |
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159 | #endif /* __rtems__ */ |
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160 | int dumpstatus(vm_offset_t addr, off_t count); |
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161 | int nullop(void); |
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162 | int eopnotsupp(void); |
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163 | int ureadc(int, struct uio *); |
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164 | void hashdestroy(void *, struct malloc_type *, u_long); |
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165 | void *hashinit(int count, struct malloc_type *type, u_long *hashmark); |
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166 | void *hashinit_flags(int count, struct malloc_type *type, |
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167 | u_long *hashmask, int flags); |
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168 | #define HASH_NOWAIT 0x00000001 |
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169 | #define HASH_WAITOK 0x00000002 |
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170 | |
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171 | void *phashinit(int count, struct malloc_type *type, u_long *nentries); |
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172 | void g_waitidle(void); |
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173 | |
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174 | #ifdef RESTARTABLE_PANICS |
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175 | void panic(const char *, ...) __printflike(1, 2); |
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176 | #else |
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177 | void panic(const char *, ...) __dead2 __printflike(1, 2); |
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178 | #endif |
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179 | |
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180 | void cpu_boot(int); |
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181 | void cpu_flush_dcache(void *, size_t); |
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182 | void cpu_rootconf(void); |
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183 | void critical_enter(void); |
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184 | void critical_exit(void); |
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185 | void init_param1(void); |
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186 | void init_param2(long physpages); |
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187 | void init_param3(long kmempages); |
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188 | void tablefull(const char *); |
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189 | int kvprintf(char const *, void (*)(int, void*), void *, int, |
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190 | __va_list) __printflike(1, 0); |
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191 | void log(int, const char *, ...) __printflike(2, 3); |
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192 | void log_console(struct uio *); |
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193 | int printf(const char *, ...) __printflike(1, 2); |
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194 | int snprintf(char *, size_t, const char *, ...) __printflike(3, 4); |
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195 | int sprintf(char *buf, const char *, ...) __printflike(2, 3); |
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196 | int uprintf(const char *, ...) __printflike(1, 2); |
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197 | int vprintf(const char *, __va_list) __printflike(1, 0); |
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198 | int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0); |
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199 | int vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0); |
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200 | int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0); |
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201 | int ttyprintf(struct tty *, const char *, ...) __printflike(2, 3); |
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202 | int sscanf(const char *, char const *, ...) __nonnull(1) __nonnull(2); |
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203 | int vsscanf(const char *, char const *, __va_list) __nonnull(1) __nonnull(2); |
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204 | long strtol(const char *, char **, int) __nonnull(1); |
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205 | u_long strtoul(const char *, char **, int) __nonnull(1); |
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206 | quad_t strtoq(const char *, char **, int) __nonnull(1); |
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207 | u_quad_t strtouq(const char *, char **, int) __nonnull(1); |
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208 | void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4); |
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209 | void hexdump(const void *ptr, int length, const char *hdr, int flags); |
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210 | #define HD_COLUMN_MASK 0xff |
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211 | #define HD_DELIM_MASK 0xff00 |
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212 | #define HD_OMIT_COUNT (1 << 16) |
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213 | #define HD_OMIT_HEX (1 << 17) |
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214 | #define HD_OMIT_CHARS (1 << 18) |
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215 | |
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216 | #define ovbcopy(f, t, l) bcopy((f), (t), (l)) |
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217 | void bcopy(const void *from, void *to, size_t len) __nonnull(1) __nonnull(2); |
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218 | void bzero(void *buf, size_t len) __nonnull(1); |
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219 | |
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220 | void *memcpy(void *to, const void *from, size_t len) __nonnull(1) __nonnull(2); |
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221 | void *memmove(void *dest, const void *src, size_t n) __nonnull(1) __nonnull(2); |
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222 | |
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223 | int copystr(const void * __restrict kfaddr, void * __restrict kdaddr, |
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224 | size_t len, size_t * __restrict lencopied) |
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225 | __nonnull(1) __nonnull(2); |
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226 | int copyinstr(const void * __restrict udaddr, void * __restrict kaddr, |
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227 | size_t len, size_t * __restrict lencopied) |
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228 | __nonnull(1) __nonnull(2); |
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229 | int copyin(const void * __restrict udaddr, void * __restrict kaddr, |
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230 | size_t len) __nonnull(1) __nonnull(2); |
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231 | int copyout(const void * __restrict kaddr, void * __restrict udaddr, |
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232 | size_t len) __nonnull(1) __nonnull(2); |
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233 | |
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234 | int fubyte(const void *base); |
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235 | long fuword(const void *base); |
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236 | int fuword16(void *base); |
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237 | int32_t fuword32(const void *base); |
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238 | int64_t fuword64(const void *base); |
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239 | int subyte(void *base, int byte); |
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240 | int suword(void *base, long word); |
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241 | int suword16(void *base, int word); |
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242 | int suword32(void *base, int32_t word); |
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243 | int suword64(void *base, int64_t word); |
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244 | uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval); |
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245 | u_long casuword(volatile u_long *p, u_long oldval, u_long newval); |
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246 | |
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247 | void realitexpire(void *); |
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248 | |
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249 | int sysbeep(int hertz, int period); |
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250 | |
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251 | void hardclock(int usermode, uintfptr_t pc); |
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252 | void hardclock_cpu(int usermode); |
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253 | void softclock(void *); |
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254 | void statclock(int usermode); |
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255 | void profclock(int usermode, uintfptr_t pc); |
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256 | |
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257 | void startprofclock(struct proc *); |
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258 | void stopprofclock(struct proc *); |
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259 | void cpu_startprofclock(void); |
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260 | void cpu_stopprofclock(void); |
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261 | |
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262 | #ifndef __rtems__ |
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263 | int cr_cansee(struct ucred *u1, struct ucred *u2); |
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264 | int cr_canseesocket(struct ucred *cred, struct socket *so); |
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265 | int cr_canseeinpcb(struct ucred *cred, struct inpcb *inp); |
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266 | #else /* __rtems__ */ |
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267 | #define cr_cansee(u1, u2) 1 |
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268 | #define cr_canseesocket(cred, so) 1 |
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269 | #define cr_canseeinpcb(cred, inp) 1 |
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270 | #endif /* __rtems__ */ |
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271 | |
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272 | char *getenv(const char *name); |
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273 | void freeenv(char *env); |
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274 | int getenv_int(const char *name, int *data); |
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275 | int getenv_uint(const char *name, unsigned int *data); |
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276 | int getenv_long(const char *name, long *data); |
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277 | int getenv_ulong(const char *name, unsigned long *data); |
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278 | int getenv_string(const char *name, char *data, int size); |
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279 | int getenv_quad(const char *name, quad_t *data); |
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280 | int setenv(const char *name, const char *value); |
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281 | int unsetenv(const char *name); |
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282 | int testenv(const char *name); |
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283 | |
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284 | typedef uint64_t (cpu_tick_f)(void); |
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285 | void set_cputicker(cpu_tick_f *func, uint64_t freq, unsigned var); |
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286 | extern cpu_tick_f *cpu_ticks; |
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287 | uint64_t cpu_tickrate(void); |
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288 | uint64_t cputick2usec(uint64_t tick); |
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289 | |
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290 | #ifdef APM_FIXUP_CALLTODO |
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291 | struct timeval; |
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292 | void adjust_timeout_calltodo(struct timeval *time_change); |
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293 | #endif /* APM_FIXUP_CALLTODO */ |
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294 | |
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295 | #include <sys/libkern.h> |
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296 | |
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297 | /* Initialize the world */ |
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298 | void consinit(void); |
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299 | void cpu_initclocks(void); |
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300 | void usrinfoinit(void); |
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301 | |
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302 | /* Finalize the world */ |
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303 | void shutdown_nice(int); |
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304 | |
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305 | /* Timeouts */ |
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306 | typedef void timeout_t(void *); /* timeout function type */ |
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307 | #define CALLOUT_HANDLE_INITIALIZER(handle) \ |
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308 | { NULL } |
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309 | |
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310 | void callout_handle_init(struct callout_handle *); |
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311 | struct callout_handle timeout(timeout_t *, void *, int); |
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312 | void untimeout(timeout_t *, void *, struct callout_handle); |
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313 | caddr_t kern_timeout_callwheel_alloc(caddr_t v); |
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314 | void kern_timeout_callwheel_init(void); |
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315 | |
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316 | /* Stubs for obsolete functions that used to be for interrupt management */ |
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317 | static __inline void spl0(void) { return; } |
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318 | static __inline intrmask_t splbio(void) { return 0; } |
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319 | static __inline intrmask_t splcam(void) { return 0; } |
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320 | static __inline intrmask_t splclock(void) { return 0; } |
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321 | static __inline intrmask_t splhigh(void) { return 0; } |
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322 | static __inline intrmask_t splimp(void) { return 0; } |
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323 | static __inline intrmask_t splnet(void) { return 0; } |
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324 | static __inline intrmask_t splsoftcam(void) { return 0; } |
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325 | static __inline intrmask_t splsoftclock(void) { return 0; } |
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326 | static __inline intrmask_t splsofttty(void) { return 0; } |
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327 | static __inline intrmask_t splsoftvm(void) { return 0; } |
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328 | static __inline intrmask_t splsofttq(void) { return 0; } |
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329 | static __inline intrmask_t splstatclock(void) { return 0; } |
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330 | static __inline intrmask_t spltty(void) { return 0; } |
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331 | static __inline intrmask_t splvm(void) { return 0; } |
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332 | static __inline void splx(intrmask_t ipl __unused) { return; } |
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333 | |
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334 | /* |
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335 | * Common `proc' functions are declared here so that proc.h can be included |
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336 | * less often. |
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337 | */ |
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338 | int _sleep(void *chan, struct lock_object *lock, int pri, const char *wmesg, |
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339 | int timo) __nonnull(1); |
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340 | #define msleep(chan, mtx, pri, wmesg, timo) \ |
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341 | _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (timo)) |
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342 | int msleep_spin(void *chan, struct mtx *mtx, const char *wmesg, int timo) |
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343 | __nonnull(1); |
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344 | int pause(const char *wmesg, int timo); |
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345 | #define tsleep(chan, pri, wmesg, timo) \ |
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346 | _sleep((chan), NULL, (pri), (wmesg), (timo)) |
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347 | void wakeup(void *chan) __nonnull(1); |
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348 | void wakeup_one(void *chan) __nonnull(1); |
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349 | |
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350 | /* |
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351 | * Common `struct cdev *' stuff are declared here to avoid #include poisoning |
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352 | */ |
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353 | |
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354 | struct cdev; |
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355 | dev_t dev2udev(struct cdev *x); |
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356 | const char *devtoname(struct cdev *cdev); |
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357 | |
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358 | int poll_no_poll(int events); |
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359 | |
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360 | /* XXX: Should be void nanodelay(u_int nsec); */ |
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361 | void DELAY(int usec); |
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362 | |
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363 | /* Root mount holdback API */ |
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364 | struct root_hold_token; |
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365 | |
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366 | struct root_hold_token *root_mount_hold(const char *identifier); |
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367 | void root_mount_rel(struct root_hold_token *h); |
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368 | void root_mount_wait(void); |
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369 | int root_mounted(void); |
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370 | |
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371 | |
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372 | /* |
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373 | * Unit number allocation API. (kern/subr_unit.c) |
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374 | */ |
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375 | struct unrhdr; |
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376 | struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex); |
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377 | void delete_unrhdr(struct unrhdr *uh); |
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378 | void clean_unrhdr(struct unrhdr *uh); |
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379 | void clean_unrhdrl(struct unrhdr *uh); |
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380 | int alloc_unr(struct unrhdr *uh); |
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381 | int alloc_unrl(struct unrhdr *uh); |
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382 | void free_unr(struct unrhdr *uh, u_int item); |
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383 | |
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384 | /* |
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385 | * This is about as magic as it gets. fortune(1) has got similar code |
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386 | * for reversing bits in a word. Who thinks up this stuff?? |
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387 | * |
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388 | * Yes, it does appear to be consistently faster than: |
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389 | * while (i = ffs(m)) { |
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390 | * m >>= i; |
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391 | * bits++; |
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392 | * } |
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393 | * and |
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394 | * while (lsb = (m & -m)) { // This is magic too |
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395 | * m &= ~lsb; // or: m ^= lsb |
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396 | * bits++; |
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397 | * } |
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398 | * Both of these latter forms do some very strange things on gcc-3.1 with |
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399 | * -mcpu=pentiumpro and/or -march=pentiumpro and/or -O or -O2. |
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400 | * There is probably an SSE or MMX popcnt instruction. |
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401 | * |
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402 | * I wonder if this should be in libkern? |
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403 | * |
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404 | * XXX Stop the presses! Another one: |
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405 | * static __inline u_int32_t |
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406 | * popcnt1(u_int32_t v) |
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407 | * { |
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408 | * v -= ((v >> 1) & 0x55555555); |
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409 | * v = (v & 0x33333333) + ((v >> 2) & 0x33333333); |
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410 | * v = (v + (v >> 4)) & 0x0F0F0F0F; |
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411 | * return (v * 0x01010101) >> 24; |
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412 | * } |
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413 | * The downside is that it has a multiply. With a pentium3 with |
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414 | * -mcpu=pentiumpro and -march=pentiumpro then gcc-3.1 will use |
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415 | * an imull, and in that case it is faster. In most other cases |
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416 | * it appears slightly slower. |
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417 | * |
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418 | * Another variant (also from fortune): |
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419 | * #define BITCOUNT(x) (((BX_(x)+(BX_(x)>>4)) & 0x0F0F0F0F) % 255) |
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420 | * #define BX_(x) ((x) - (((x)>>1)&0x77777777) \ |
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421 | * - (((x)>>2)&0x33333333) \ |
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422 | * - (((x)>>3)&0x11111111)) |
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423 | */ |
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424 | static __inline uint32_t |
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425 | bitcount32(uint32_t x) |
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426 | { |
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427 | |
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428 | x = (x & 0x55555555) + ((x & 0xaaaaaaaa) >> 1); |
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429 | x = (x & 0x33333333) + ((x & 0xcccccccc) >> 2); |
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430 | x = (x + (x >> 4)) & 0x0f0f0f0f; |
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431 | x = (x + (x >> 8)); |
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432 | x = (x + (x >> 16)) & 0x000000ff; |
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433 | return (x); |
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434 | } |
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435 | |
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436 | #endif /* !_SYS_SYSTM_H_ */ |
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