arch/mips/fw/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/init.h>
  15 #include <linux/kernel.h>
  16 #include <linux/types.h>
  17 #include <linux/string.h>
  18
  19 #include <asm/sgialib.h>
  20 #include <asm/bootinfo.h>
  21
  22 struct smatch {
  23         char *arcname;
  24         char *liname;
  25         int type;
  26         int flags;
  27 };
  28
  29 static struct smatch mach_table[] = {
  30         {
  31                 .arcname        = "SGI-IP22",
  32                 .liname         = "SGI Indy",
  33                 .type           = MACH_SGI_IP22,
  34                 .flags          = PROM_FLAG_ARCS,
  35         }, {
  36                 .arcname        = "SGI-IP27",
  37                 .liname         = "SGI Origin",
  38                 .type           = MACH_SGI_IP27,
  39                 .flags          = PROM_FLAG_ARCS,
  40         }, {
  41                 .arcname        = "SGI-IP28",
  42                 .liname         = "SGI IP28",
  43                 .type           = MACH_SGI_IP28,
  44                 .flags          = PROM_FLAG_ARCS,
  45         }, {
  46                 .arcname        = "SGI-IP30",
  47                 .liname         = "SGI Octane",
  48                 .type           = MACH_SGI_IP30,
  49                 .flags          = PROM_FLAG_ARCS,
  50         }, {
  51                 .arcname        = "SGI-IP32",
  52                 .liname         = "SGI O2",
  53                 .type           = MACH_SGI_IP32,
  54                 .flags          = PROM_FLAG_ARCS,
  55         }, {
  56                 .arcname        = "Microsoft-Jazz",
  57                 .liname         = "Jazz MIPS_Magnum_4000",
  58                 .type           = MACH_MIPS_MAGNUM_4000,
  59                 .flags          = 0,
  60         }, {
  61                 .arcname        = "PICA-61",
  62                 .liname         = "Jazz Acer_PICA_61",
  63                 .type           = MACH_ACER_PICA_61,
  64                 .flags          = 0,
  65         }, {
  66                 .arcname        = "RM200PCI",
  67                 .liname         = "SNI RM200_PCI",
  68                 .type           = MACH_SNI_RM200_PCI,
  69                 .flags          = PROM_FLAG_DONT_FREE_TEMP,
  70         }
  71 };
  72
  73 int prom_flags;
  74
  75 static struct smatch * __init string_to_mach(const char *s)
  76 {
  77         int i;
  78
  79         for (i = 0; i < ARRAY_SIZE(mach_table); i++) {
  80                 if (!strcmp(s, mach_table[i].arcname))
  81                         return &mach_table[i];
  82         }
  83
  84         panic("Yeee, could not determine architecture type <%s>", s);
  85 }
  86
  87 char *system_type;
  88
  89 const char *get_system_type(void)
  90 {
  91         return system_type;
  92 }
  93
  94 void __init prom_identify_arch(void)
  95 {
  96         pcomponent *p;
  97         struct smatch *mach;
  98         const char *iname;
  99
 100         /*
 101          * The root component tells us what machine architecture we have here.
 102          */
 103         p = ArcGetChild(PROM_NULL_COMPONENT);
 104         if (p == NULL) {
 105 #ifdef CONFIG_SGI_IP27
 106                 /* IP27 PROM misbehaves, seems to not implement ARC
 107                    GetChild().  So we just assume it's an IP27.  */
 108                 iname = "SGI-IP27";
 109 #else
 110                 iname = "Unknown";
 111 #endif
 112         } else
 113                 iname = (char *) (long) p->iname;
 114
 115         printk("ARCH: %s\n", iname);
 116         mach = string_to_mach(iname);
 117         system_type = mach->liname;
 118
 119         mips_machtype = mach->type;
 120         prom_flags = mach->flags;
 121 }