sys/arch/i386/include/cpu.h

   1 /*      $OpenBSD: cpu.h,v 1.41 2002/03/14 01:26:33 millert Exp $        */
   2 /*      $NetBSD: cpu.h,v 1.35 1996/05/05 19:29:26 christos Exp $        */
   3
   4 /*-
   5  * Copyright (c) 1990 The Regents of the University of California.
   6  * All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * William Jolitz.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  *
  39  *      @(#)cpu.h       5.4 (Berkeley) 5/9/91
  40  */
  41
  42 #ifndef _I386_CPU_H_
  43 #define _I386_CPU_H_
  44
  45 /*
  46  * Definitions unique to i386 cpu support.
  47  */
  48 #include <machine/psl.h>
  49 #include <machine/frame.h>
  50 #include <machine/segments.h>
  51
  52 /*
  53  * definitions of cpu-dependent requirements
  54  * referenced in generic code
  55  */
  56 #define cpu_swapin(p)                   /* nothing */
  57
  58 /*
  59  * Arguments to hardclock, softclock and statclock
  60  * encapsulate the previous machine state in an opaque
  61  * clockframe; for now, use generic intrframe.
  62  *
  63  * XXX intrframe has a lot of gunk we don't need.
  64  */
  65 #define clockframe intrframe
  66
  67 #define CLKF_USERMODE(frame)    USERMODE((frame)->if_cs, (frame)->if_eflags)
  68 #define CLKF_BASEPRI(frame)     ((frame)->if_ppl == 0)
  69 #define CLKF_PC(frame)          ((frame)->if_eip)
  70 #define CLKF_INTR(frame)        (IDXSEL((frame)->if_cs) == GICODE_SEL)
  71
  72 /*
  73  * Preempt the current process if in interrupt from user mode,
  74  * or after the current trap/syscall if in system mode.
  75  */
  76 int     want_resched;           /* resched() was called */
  77 #define need_resched()          (want_resched = 1, setsoftast())
  78
  79 /*
  80  * Give a profiling tick to the current process when the user profiling
  81  * buffer pages are invalid.  On the i386, request an ast to send us
  82  * through trap(), marking the proc as needing a profiling tick.
  83  */
  84 #define need_proftick(p)        ((p)->p_flag |= P_OWEUPC, setsoftast())
  85
  86 /*
  87  * Notify the current process (p) that it has a signal pending,
  88  * process as soon as possible.
  89  */
  90 #define signotify(p)            setsoftast()
  91
  92 /*
  93  * We need a machine-independent name for this.
  94  */
  95 #define DELAY(x)                delay(x)
  96 void    delay(int);
  97
  98 #if defined(I586_CPU) || defined(I686_CPU)
  99 /*
 100  * High resolution clock support (Pentium only)
 101  */
 102 void    calibrate_cyclecounter(void);
 103 #ifndef HZ
 104 extern u_quad_t pentium_base_tsc;
 105 #define CPU_CLOCKUPDATE(otime, ntime)                                   \
 106         do {                                                            \
 107                 if (pentium_mhz) {                                      \
 108                         __asm __volatile("cli\n"                        \
 109                                          "movl (%3), %%eax\n"           \
 110                                          "movl %%eax, (%2)\n"           \
 111                                          "movl 4(%3), %%eax\n"          \
 112                                          "movl %%eax, 4(%2)\n"          \
 113                                          ".byte 0xf, 0x31\n"            \
 114                                          "sti\n"                        \
 115                                          "#%0 %1 %2 %3"                 \
 116                                          : "=m" (*otime),               \
 117                                          "=A" (pentium_base_tsc)        \
 118                                          : "c" (otime), "b" (ntime));   \
 119                 }                                                       \
 120                 else {                                                  \
 121                         *(otime) = *(ntime);                            \
 122                 }                                                       \
 123         } while (0)
 124 #endif
 125 #endif
 126
 127 /*
 128  * pull in #defines for kinds of processors
 129  */
 130 #include <machine/cputypes.h>
 131
 132 struct cpu_nocpuid_nameclass {
 133         int cpu_vendor;
 134         const char *cpu_vendorname;
 135         const char *cpu_name;
 136         int cpu_class;
 137         void (*cpu_setup)(const char *, int, int);
 138 };
 139
 140 struct cpu_cpuid_nameclass {
 141         const char *cpu_id;
 142         int cpu_vendor;
 143         const char *cpu_vendorname;
 144         struct cpu_cpuid_family {
 145                 int cpu_class;
 146                 const char *cpu_models[CPU_MAXMODEL+2];
 147                 void (*cpu_setup)(const char *, int, int);
 148         } cpu_family[CPU_MAXFAMILY - CPU_MINFAMILY + 1];
 149 };
 150
 151 struct cpu_cpuid_feature {
 152         int feature_bit;
 153         const char *feature_name;
 154 };
 155
 156 #ifdef _KERNEL
 157 extern int cpu;
 158 extern int cpu_class;
 159 extern int cpu_feature;
 160 extern int cpu_apmwarn;
 161 extern int cpu_apmhalt;
 162 extern int cpuid_level;
 163 extern const struct cpu_nocpuid_nameclass i386_nocpuid_cpus[];
 164 extern const struct cpu_cpuid_nameclass i386_cpuid_cpus[];
 165
 166 #if defined(I586_CPU) || defined(I686_CPU)
 167 extern int pentium_mhz;
 168 #endif
 169
 170 #ifdef I586_CPU
 171 /* F00F bug fix stuff for pentium cpu */
 172 extern int cpu_f00f_bug;
 173 void fix_f00f(void);
 174 #endif
 175
 176 #ifndef PMON
 177 /* dkcsum.c */
 178 void    dkcsumattach(void);
 179
 180 /* machdep.c */
 181 void    dumpconf(void);
 182 void    cpu_reset(void);
 183 void    i386_proc0_tss_ldt_init(void);
 184
 185 /* locore.s */
 186 struct region_descriptor;
 187 void    lgdt(struct region_descriptor *);
 188 void    fillw(short, void *, size_t);
 189 short   fusword(u_short *);
 190 int     susword(u_short *t, u_short);
 191
 192 struct pcb;
 193 void    savectx(struct pcb *);
 194 void    switch_exit(struct proc *);
 195 void    proc_trampoline(void);
 196
 197 /* clock.c */
 198 void    initrtclock(void);
 199 void    startrtclock(void);
 200 void    rtcdrain(void *);
 201
 202 /* npx.c */
 203 void    npxdrop(void);
 204 void    npxsave(void);
 205
 206 #if defined(MATH_EMULATE) || defined(GPL_MATH_EMULATE)
 207 /* math_emulate.c */
 208 int     math_emulate(struct trapframe *);
 209 #endif
 210
 211 #ifdef USER_LDT
 212 /* sys_machdep.h */
 213 void    i386_user_cleanup(struct pcb *);
 214 int     i386_get_ldt(struct proc *, void *, register_t *);
 215 int     i386_set_ldt(struct proc *, void *, register_t *);
 216 #endif
 217
 218 /* isa_machdep.c */
 219 void    isa_defaultirq(void);
 220 int     isa_nmi(void);
 221
 222 /* pmap.c */
 223 void    pmap_bootstrap(vm_offset_t);
 224
 225 /* vm_machdep.c */
 226 int     kvtop(caddr_t);
 227
 228 #ifdef VM86
 229 /* vm86.c */
 230 void    vm86_gpfault(struct proc *, int);
 231 #endif /* VM86 */
 232
 233 #ifdef GENERIC
 234 /* swapgeneric.c */
 235 void    setconf(void);
 236 #endif /* GENERIC */
 237 #endif /* !PMON */
 238 #endif /* _KERNEL */
 239
 240 /*
 241  * CTL_MACHDEP definitions.
 242  */
 243 #define CPU_CONSDEV             1       /* dev_t: console terminal device */
 244 #define CPU_BIOS                2       /* BIOS variables */
 245 #define CPU_BLK2CHR             3       /* convert blk maj into chr one */
 246 #define CPU_CHR2BLK             4       /* convert chr maj into blk one */
 247 #define CPU_ALLOWAPERTURE       5       /* allow mmap of /dev/xf86 */
 248 #define CPU_CPUVENDOR           6       /* cpuid vendor string */
 249 #define CPU_CPUID               7       /* cpuid */
 250 #define CPU_CPUFEATURE          8       /* cpuid features */
 251 #define CPU_APMWARN             9       /* APM battery warning percentage */
 252 #define CPU_KBDRESET            10      /* keyboard reset under pcvt */
 253 #define CPU_APMHALT             11      /* halt -p hack */
 254 #define CPU_MAXID               12      /* number of valid machdep ids */
 255
 256 #define CTL_MACHDEP_NAMES { \
 257         { 0, 0 }, \
 258         { "console_device", CTLTYPE_STRUCT }, \
 259         { "bios", CTLTYPE_INT }, \
 260         { "blk2chr", CTLTYPE_STRUCT }, \
 261         { "chr2blk", CTLTYPE_STRUCT }, \
 262         { "allowaperture", CTLTYPE_INT }, \
 263         { "cpuvendor", CTLTYPE_STRING }, \
 264         { "cpuid", CTLTYPE_INT }, \
 265         { "cpufeature", CTLTYPE_INT }, \
 266         { "apmwarn", CTLTYPE_INT }, \
 267         { "kbdreset", CTLTYPE_INT }, \
 268         { "apmhalt", CTLTYPE_INT }, \
 269 }
 270
 271 static __inline int get_count __P((void));
 272 static __inline int
 273    get_count()
 274 {
 275 #if 0
 276         int _decr_;
 277
 278         __asm__  volatile("mfspr %0, 22\n" : "=r"(_decr_));
 279         return( 0 - _decr_);
 280 #else
 281         return (0);
 282 #endif
 283 }
 284
 285 #endif /* !_I386_CPU_H_ */