identify.c

ARM 嵌入式 系统 设计与实例开发 实验教材 二源码

/*
 * 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 ([e-mail])
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>

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

struct smatch {
	char *name;
	int group;
	int type;
	int flags;
};

static struct smatch mach_table[] = {
	{"SGI-IP22", MACH_GROUP_SGI, MACH_SGI_INDY, PROM_FLAG_ARCS},
	{"Microsoft-Jazz", MACH_GROUP_JAZZ, MACH_MIPS_MAGNUM_4000, 0},
	{"PICA-61", MACH_GROUP_JAZZ, MACH_ACER_PICA_61, 0},
	{"RM200PCI", MACH_GROUP_SNI_RM, MACH_SNI_RM200_PCI, 0}
};

int prom_flags;

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

	for (i = 0; i < (sizeof(mach_table) / sizeof (mach_table[0])); i++) {
		if (!strcmp(s, mach_table[i].name))
			return &mach_table[i];
	}
	prom_printf("\nYeee, could not determine architecture type <%s>\n",
		    s);
	prom_printf("press a key to reboot\n");
	prom_getchar();
	romvec->imode();
	return NULL;
}

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

	/*
	 * The root component tells us what machine architecture we
	 * have here.
	 */
	p = prom_getchild(PROM_NULL_COMPONENT);
	printk("ARCH: %s\n", p->iname);
	mach = string_to_mach(p->iname);

	mips_machgroup = mach->group;
	mips_machtype = mach->type;
	prom_flags = mach->flags;
}