identify.c

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/*
 * 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 ([email protected])
 */
#include <linux/bug.h>
#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;
}