release/src-rt-6.x/linux/linux-2.6/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/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 group;
  26         int type;
  27         int flags;
  28 };
  29
  30 static struct smatch mach_table[] = {
  31         {       "SGI-IP22",
  32                 "SGI Indy",
  33                 MACH_GROUP_SGI,
  34                 MACH_SGI_IP22,
  35                 PROM_FLAG_ARCS
  36         }, {    "SGI-IP27",
  37                 "SGI Origin",
  38                 MACH_GROUP_SGI,
  39                 MACH_SGI_IP27,
  40                 PROM_FLAG_ARCS
  41         }, {    "SGI-IP28",
  42                 "SGI IP28",
  43                 MACH_GROUP_SGI,
  44                 MACH_SGI_IP28,
  45                 PROM_FLAG_ARCS
  46         }, {    "SGI-IP30",
  47                 "SGI Octane",
  48                 MACH_GROUP_SGI,
  49                 MACH_SGI_IP30,
  50                 PROM_FLAG_ARCS
  51         }, {    "SGI-IP32",
  52                 "SGI O2",
  53                 MACH_GROUP_SGI,
  54                 MACH_SGI_IP32,
  55                 PROM_FLAG_ARCS
  56         }, {    "Microsoft-Jazz",
  57                 "Jazz MIPS_Magnum_4000",
  58                 MACH_GROUP_JAZZ,
  59                 MACH_MIPS_MAGNUM_4000,
  60                 0
  61         }, {    "PICA-61",
  62                 "Jazz Acer_PICA_61",
  63                 MACH_GROUP_JAZZ,
  64                 MACH_ACER_PICA_61,
  65                 0
  66         }, {    "RM200PCI",
  67                 "SNI RM200_PCI",
  68                 MACH_GROUP_SNI_RM,
  69                 MACH_SNI_RM200_PCI,
  70                 PROM_FLAG_DONT_FREE_TEMP
  71         }, {
  72                 "RM200PCI-R5K",
  73                 "SNI RM200_PCI-R5K",
  74                 MACH_GROUP_SNI_RM,
  75                 MACH_SNI_RM200_PCI,
  76                 PROM_FLAG_DONT_FREE_TEMP,
  77         }
  78 };
  79
  80 int prom_flags;
  81
  82 static struct smatch * __init string_to_mach(const char *s)
  83 {
  84         int i;
  85
  86         for (i = 0; i < ARRAY_SIZE(mach_table); i++) {
  87                 if (!strcmp(s, mach_table[i].arcname))
  88                         return &mach_table[i];
  89         }
  90
  91         panic("Yeee, could not determine architecture type <%s>", s);
  92 }
  93
  94 char *system_type;
  95
  96 const char *get_system_type(void)
  97 {
  98         return system_type;
  99 }
 100
 101 void __init prom_identify_arch(void)
 102 {
 103         pcomponent *p;
 104         struct smatch *mach;
 105         const char *iname;
 106
 107         /*
 108          * The root component tells us what machine architecture we have here.
 109          */
 110         p = ArcGetChild(PROM_NULL_COMPONENT);
 111         if (p == NULL) {
 112 #ifdef CONFIG_SGI_IP27
 113                 /* IP27 PROM misbehaves, seems to not implement ARC
 114                    GetChild().  So we just assume it's an IP27.  */
 115                 iname = "SGI-IP27";
 116 #else
 117                 iname = "Unknown";
 118 #endif
 119         } else
 120                 iname = (char *) (long) p->iname;
 121
 122         printk("ARCH: %s\n", iname);
 123         mach = string_to_mach(iname);
 124         system_type = mach->liname;
 125
 126         mips_machgroup = mach->group;
 127         mips_machtype = mach->type;
 128         prom_flags = mach->flags;
 129 }