identify.c

microwindows移植到S3C44B0的源码

/*
 * 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/config.h>
#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 *arcname;
	char *liname;
	int group;
	int type;
	int flags;
};

static struct smatch mach_table[] = {
	{	"SGI-IP22",
		"SGI Indy",
		MACH_GROUP_SGI,
		MACH_SGI_INDY,
		PROM_FLAG_ARCS
	}, {	"Microsoft-Jazz",
		"Jazz MIPS_Magnum_4000",
		MACH_GROUP_JAZZ,
		MACH_MIPS_MAGNUM_4000,
		0
	}, {	"PICA-61",
		"Jazz Acer_PICA_61",
		MACH_GROUP_JAZZ,
		MACH_ACER_PICA_61,
		0
	}, {	"RM200PCI",
		"SNI RM200_PCI",
		MACH_GROUP_SNI_RM,
		MACH_SNI_RM200_PCI,
		0
	}
};

int prom_flags;

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

	for (i = 0; i < (sizeof(mach_table) / sizeof (mach_table[0])); 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 bisbehaves, seems to not implement ARC
	   GetChild().  So we just assume it's an IP27.  */
		iname = "SGI-IP27";
#endif
	} else
		iname = (char *) (long) p->iname;

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

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