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identify.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * identify.c: identify machine by looking up system identifier
 *
 * Copyright (C) 1998 Thomas Bogendoerfer
 *
 * This code is based on arch/mips/sgi/kernel/system.c, which is
 *
 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>

#include <asm/sgialib.h>
#include <asm/bootinfo.h>

struct smatch {
      char *arcname;
      char *liname;
      int flags;
};

static struct smatch mach_table[] = {
      {
            .arcname    = "SGI-IP22",
            .liname           = "SGI Indy",
            .flags            = PROM_FLAG_ARCS,
      }, {
            .arcname    = "SGI-IP27",
            .liname           = "SGI Origin",
            .flags            = PROM_FLAG_ARCS,
      }, {
            .arcname    = "SGI-IP28",
            .liname           = "SGI IP28",
            .flags            = PROM_FLAG_ARCS,
      }, {
            .arcname    = "SGI-IP30",
            .liname           = "SGI Octane",
            .flags            = PROM_FLAG_ARCS,
      }, {
            .arcname    = "SGI-IP32",
            .liname           = "SGI O2",
            .flags            = PROM_FLAG_ARCS,
      }, {
            .arcname    = "Microsoft-Jazz",
            .liname           = "Jazz MIPS_Magnum_4000",
            .flags            = 0,
      }, {
            .arcname    = "PICA-61",
            .liname           = "Jazz Acer_PICA_61",
            .flags            = 0,
      }, {
            .arcname    = "RM200PCI",
            .liname           = "SNI RM200_PCI",
            .flags            = PROM_FLAG_DONT_FREE_TEMP,
      }, {
            .arcname    = "RM200PCI-R5K",
            .liname           = "SNI RM200_PCI-R5K",
            .flags            = PROM_FLAG_DONT_FREE_TEMP,
      }
};

int prom_flags;

static struct smatch * __init string_to_mach(const char *s)
{
      int i;

      for (i = 0; i < ARRAY_SIZE(mach_table); i++) {
            if (!strcmp(s, mach_table[i].arcname))
                  return &mach_table[i];
      }

      panic("Yeee, could not determine architecture type <%s>", s);
}

char *system_type;

const char *get_system_type(void)
{
      return system_type;
}

void __init prom_identify_arch(void)
{
      pcomponent *p;
      struct smatch *mach;
      const char *iname;

      /*
       * The root component tells us what machine architecture we have here.
       */
      p = ArcGetChild(PROM_NULL_COMPONENT);
      if (p == NULL) {
#ifdef CONFIG_SGI_IP27
            /* IP27 PROM misbehaves, seems to not implement ARC
               GetChild().  So we just assume it's an IP27.  */
            iname = "SGI-IP27";
#else
            iname = "Unknown";
#endif
      } else
            iname = (char *) (long) p->iname;

      printk("ARCH: %s\n", iname);
      mach = string_to_mach(iname);
      system_type = mach->liname;

      prom_flags = mach->flags;
}

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