bsd/dev/i386/kern_machdep.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  *      Copyright (C) 1990,  NeXT, Inc.
  24  *
  25  *      File:   next/kern_machdep.c
  26  *      Author: John Seamons
  27  *
  28  *      Machine-specific kernel routines.
  29  *
  30  *  8-Dec-91  Peter King (king) at NeXT
  31  *      Added grade_cpu_subtype().
  32  *      FIXME: Do we want to merge this with check_cpu_subtype()?
  33  *
  34  *  5-Mar-90  John Seamons (jks) at NeXT
  35  *      Created.
  36  */
  37
  38 #include        <sys/types.h>
  39 #include        <mach/machine.h>
  40 #include        <kern/cpu_number.h>
  41
  42 check_cpu_subtype (cpu_subtype)
  43         cpu_subtype_t cpu_subtype;
  44 {
  45         struct machine_slot *ms = &machine_slot[cpu_number()];
  46
  47         switch (ms->cpu_subtype) {
  48             case CPU_SUBTYPE_386:
  49                 if (cpu_subtype == CPU_SUBTYPE_386)
  50                     return (TRUE);
  51                 break;
  52
  53             case CPU_SUBTYPE_486:
  54             case CPU_SUBTYPE_486SX:
  55                 if (    cpu_subtype == CPU_SUBTYPE_486          ||
  56                         cpu_subtype == CPU_SUBTYPE_486SX        ||
  57                         cpu_subtype == CPU_SUBTYPE_386          )
  58                     return (TRUE);
  59                 break;
  60
  61             case CPU_SUBTYPE_586:
  62                 if (    cpu_subtype == CPU_SUBTYPE_586          ||
  63                         cpu_subtype == CPU_SUBTYPE_486          ||
  64                         cpu_subtype == CPU_SUBTYPE_486SX        ||
  65                         cpu_subtype == CPU_SUBTYPE_386          )
  66                     return (TRUE);
  67                 break;
  68
  69             default:
  70                 if (    CPU_SUBTYPE_INTEL_MODEL(cpu_subtype) ==
  71                         CPU_SUBTYPE_INTEL_MODEL_ALL) {
  72                     if (        CPU_SUBTYPE_INTEL_FAMILY(ms->cpu_subtype) >=
  73                                 CPU_SUBTYPE_INTEL_FAMILY(cpu_subtype))
  74                         return (TRUE);
  75                 }
  76                 else {
  77                     if (        ms->cpu_subtype == cpu_subtype)
  78                         return (TRUE);
  79                 }
  80                 break;
  81         }
  82
  83         return (FALSE);
  84 }
  85
  86 /**********************************************************************
  87  * Routine:     grade_cpu_subtype()
  88  *
  89  * Function:    Return a relative preference for cpu_subtypes in fat
  90  *              executable files.  The higher the grade, the higher the
  91  *              preference.  A grade of 0 means not acceptable.
  92  **********************************************************************/
  93 grade_cpu_subtype (cpu_subtype)
  94         cpu_subtype_t           cpu_subtype;
  95 {
  96         struct machine_slot     *ms = &machine_slot[cpu_number()];
  97
  98         switch (ms->cpu_subtype) {
  99             case CPU_SUBTYPE_386:
 100                 switch (cpu_subtype) {
 101                     case CPU_SUBTYPE_386:
 102                         return 1;
 103                     default:
 104                         return 0;
 105                 }
 106
 107             case CPU_SUBTYPE_486:
 108                 switch (cpu_subtype) {
 109                     case CPU_SUBTYPE_386:
 110                         return 1;
 111
 112                     case CPU_SUBTYPE_486SX:
 113                         return 2;
 114
 115                     case CPU_SUBTYPE_486:
 116                         return 3;
 117
 118                     default:
 119                         return 0;
 120                 }
 121
 122             case CPU_SUBTYPE_486SX:
 123                 switch (cpu_subtype) {
 124                     case CPU_SUBTYPE_386:
 125                         return 1;
 126
 127                     case CPU_SUBTYPE_486:
 128                         return 2;
 129
 130                     case CPU_SUBTYPE_486SX:
 131                         return 3;
 132
 133                     default:
 134                         return 0;
 135                 }
 136
 137             case CPU_SUBTYPE_586:
 138                 switch (cpu_subtype) {
 139                     case CPU_SUBTYPE_386:
 140                         return 1;
 141
 142                     case CPU_SUBTYPE_486SX:
 143                         return 2;
 144
 145                     case CPU_SUBTYPE_486:
 146                         return 3;
 147
 148                     case CPU_SUBTYPE_586:
 149                         return 4;
 150
 151                     default:
 152                         return 0;
 153                 }
 154
 155             default:
 156                 if (    CPU_SUBTYPE_INTEL_MODEL(cpu_subtype) ==
 157                         CPU_SUBTYPE_INTEL_MODEL_ALL) {
 158                     if (        CPU_SUBTYPE_INTEL_FAMILY(ms->cpu_subtype) >=
 159                                 CPU_SUBTYPE_INTEL_FAMILY(cpu_subtype))
 160                         return CPU_SUBTYPE_INTEL_FAMILY_MAX -
 161                             CPU_SUBTYPE_INTEL_FAMILY(ms->cpu_subtype) -
 162                             CPU_SUBTYPE_INTEL_FAMILY(cpu_subtype);
 163                 }
 164                 else {
 165                     if (        ms->cpu_subtype == cpu_subtype)
 166                         return CPU_SUBTYPE_INTEL_FAMILY_MAX + 1;
 167                 }
 168                 return 0;
 169         }
 170 }