arch/mips/arc/identify.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * identify.c: identify machine by looking up system identifier
   7  *
   8  * Copyright (C) 1998 Thomas Bogendoerfer
   9  *
  10  * This code is based on arch/mips/sgi/kernel/system.c, which is
  11  *
  12  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
  13  */
  14 #include <linux/config.h>
  15 #include <linux/init.h>
  16 #include <linux/kernel.h>
  17 #include <linux/types.h>
  18 #include <linux/string.h>
  19
  20 #include <asm/sgialib.h>
  21 #include <asm/bootinfo.h>
  22
  23 struct smatch {
  24         char *arcname;
  25         char *liname;
  26         int group;
  27         int type;
  28         int flags;
  29 };
  30
  31 static struct smatch mach_table[] = {
  32         {       "SGI-IP22",
  33                 "SGI Indy",
  34                 MACH_GROUP_SGI,
  35                 MACH_SGI_IP22,
  36                 PROM_FLAG_ARCS
  37         }, {    "SGI-IP27",
  38                 "SGI Origin",
  39                 MACH_GROUP_SGI,
  40                 MACH_SGI_IP27,
  41                 PROM_FLAG_ARCS
  42         }, {    "SGI-IP28",
  43                 "SGI IP28",
  44                 MACH_GROUP_SGI,
  45                 MACH_SGI_IP28,
  46                 PROM_FLAG_ARCS
  47         }, {    "SGI-IP32",
  48                 "SGI O2",
  49                 MACH_GROUP_SGI,
  50                 MACH_SGI_IP32,
  51                 PROM_FLAG_ARCS
  52         }, {    "Microsoft-Jazz",
  53                 "Jazz MIPS_Magnum_4000",
  54                 MACH_GROUP_JAZZ,
  55                 MACH_MIPS_MAGNUM_4000,
  56                 0
  57         }, {    "PICA-61",
  58                 "Jazz Acer_PICA_61",
  59                 MACH_GROUP_JAZZ,
  60                 MACH_ACER_PICA_61,
  61                 0
  62         }, {    "RM200PCI",
  63                 "SNI RM200_PCI",
  64                 MACH_GROUP_SNI_RM,
  65                 MACH_SNI_RM200_PCI,
  66                 PROM_FLAG_DONT_FREE_TEMP
  67         }
  68 };
  69
  70 int prom_flags;
  71
  72 static struct smatch * __init string_to_mach(const char *s)
  73 {
  74         int i;
  75
  76         for (i = 0; i < (sizeof(mach_table) / sizeof (mach_table[0])); i++) {
  77                 if (!strcmp(s, mach_table[i].arcname))
  78                         return &mach_table[i];
  79         }
  80
  81         panic("Yeee, could not determine architecture type <%s>", s);
  82 }
  83
  84 char *system_type;
  85
  86 const char *get_system_type(void)
  87 {
  88         return system_type;
  89 }
  90
  91 void __init prom_identify_arch(void)
  92 {
  93         pcomponent *p;
  94         struct smatch *mach;
  95         const char *iname;
  96
  97         /*
  98          * The root component tells us what machine architecture we have here.
  99          */
 100         p = ArcGetChild(PROM_NULL_COMPONENT);
 101         if (p == NULL) {
 102 #ifdef CONFIG_SGI_IP27
 103                 /* IP27 PROM misbehaves, seems to not implement ARC
 104                    GetChild().  So we just assume it's an IP27.  */
 105                 iname = "SGI-IP27";
 106 #else
 107                 iname = "Unknown";
 108 #endif
 109         } else
 110                 iname = (char *) (long) p->iname;
 111
 112         printk("ARCH: %s\n", iname);
 113         mach = string_to_mach(iname);
 114         system_type = mach->liname;
 115
 116         mips_machgroup = mach->group;
 117         mips_machtype = mach->type;
 118         prom_flags = mach->flags;
 119 }