bsd/dev/i386/kern_machdep.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  *      Copyright (C) 1990,  NeXT, Inc.
  32  *
  33  *      File:   next/kern_machdep.c
  34  *      Author: John Seamons
  35  *
  36  *      Machine-specific kernel routines.
  37  */
  38
  39 #include        <sys/types.h>
  40 #include        <mach/machine.h>
  41 #include        <kern/cpu_number.h>
  42
  43 extern int grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype);
  44
  45 /**********************************************************************
  46  * Routine:     grade_binary()
  47  *
  48  * Function:    Return a relative preference for exectypes and
  49  *              execsubtypes in fat executable files.  The higher the
  50  *              grade, the higher the preference.  A grade of 0 means
  51  *              not acceptable.
  52  **********************************************************************/
  53 int
  54 grade_binary(__unused cpu_type_t exectype, cpu_subtype_t execsubtype)
  55 {
  56         int             cpusubtype = cpu_subtype();
  57
  58         switch (cpusubtype) {
  59             case CPU_SUBTYPE_386:
  60                 switch (execsubtype) {
  61                     case CPU_SUBTYPE_386:
  62                         return 1;
  63                     default:
  64                         return 0;
  65                 }
  66
  67             case CPU_SUBTYPE_486:
  68                 switch (execsubtype) {
  69                     case CPU_SUBTYPE_386:
  70                         return 1;
  71
  72                     case CPU_SUBTYPE_486SX:
  73                         return 2;
  74
  75                     case CPU_SUBTYPE_486:
  76                         return 3;
  77
  78                     default:
  79                         return 0;
  80                 }
  81
  82             case CPU_SUBTYPE_486SX:
  83                 switch (execsubtype) {
  84                     case CPU_SUBTYPE_386:
  85                         return 1;
  86
  87                     case CPU_SUBTYPE_486:
  88                         return 2;
  89
  90                     case CPU_SUBTYPE_486SX:
  91                         return 3;
  92
  93                     default:
  94                         return 0;
  95                 }
  96
  97             case CPU_SUBTYPE_586:
  98                 switch (execsubtype) {
  99                     case CPU_SUBTYPE_386:
 100                         return 1;
 101
 102                     case CPU_SUBTYPE_486SX:
 103                         return 2;
 104
 105                     case CPU_SUBTYPE_486:
 106                         return 3;
 107
 108                     case CPU_SUBTYPE_586:
 109                         return 4;
 110
 111                     default:
 112                         return 0;
 113                 }
 114
 115             default:
 116                 if (    CPU_SUBTYPE_INTEL_MODEL(execsubtype) ==
 117                         CPU_SUBTYPE_INTEL_MODEL_ALL) {
 118                     if (        CPU_SUBTYPE_INTEL_FAMILY(cpusubtype) >=
 119                                 CPU_SUBTYPE_INTEL_FAMILY(execsubtype))
 120                         return CPU_SUBTYPE_INTEL_FAMILY_MAX -
 121                             CPU_SUBTYPE_INTEL_FAMILY(cpusubtype) -
 122                             CPU_SUBTYPE_INTEL_FAMILY(execsubtype);
 123                 }
 124                 else {
 125                     if (        cpusubtype == execsubtype)
 126                         return CPU_SUBTYPE_INTEL_FAMILY_MAX + 1;
 127                 }
 128                 return 0;
 129         }
 130 }
 131
 132 extern void md_prepare_for_shutdown(int, int, char *);
 133
 134 void
 135 md_prepare_for_shutdown(
 136         __unused int paniced,
 137         __unused int howto,
 138         __unused char * command)
 139 {
 140 }