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/*
* system.c: Probe the system type using ARCS prom interface library.
*
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
*
* $Id: system.c,v 1.8 1999/10/09 00:00:59 ralf Exp $
*/
#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>
enum sgi_mach sgimach;
struct smatch {
char *name;
int type;
};
static struct smatch sgi_cputable[] = {
{ "MIPS-R2000", CPU_R2000 },
{ "MIPS-R3000", CPU_R3000 },
{ "MIPS-R3000A", CPU_R3000A },
{ "MIPS-R4000", CPU_R4000SC },
{ "MIPS-R4400", CPU_R4400SC },
{ "MIPS-R4600", CPU_R4600 },
{ "MIPS-R8000", CPU_R8000 },
{ "MIPS-R5000", CPU_R5000 },
{ "MIPS-R5000A", CPU_R5000A }
};
#define NUM_CPUS 9 /* for now */
static int __init string_to_cpu(char *s)
{
int i;
for(i = 0; i < NUM_CPUS; i++) {
if(!strcmp(s, sgi_cputable[i].name))
return sgi_cputable[i].type;
}
prom_printf("\nYeee, could not determine MIPS cpu type <%s>\n", s);
prom_printf("press a key to reboot\n");
prom_getchar();
romvec->imode();
return 0;
}
/*
* We' call this early before loadmmu(). If we do the other way around
* the firmware will crash and burn.
*/
void __init sgi_sysinit(void)
{
pcomponent *p, *toplev, *cpup = 0;
int cputype = -1;
/* The root component tells us what machine architecture we
* have here.
*/
p = prom_getchild(PROM_NULL_COMPONENT);
/* Now scan for cpu(s). */
toplev = p = prom_getchild(p);
while(p) {
int ncpus = 0;
if(p->type == Cpu) {
if(++ncpus > 1) {
prom_printf("\nYeee, SGI MP not ready yet\n");
prom_printf("press a key to reboot\n");
prom_getchar();
romvec->imode();
}
printk("CPU: %s ", p->iname);
cpup = p;
cputype = string_to_cpu(cpup->iname);
}
p = prom_getsibling(p);
}
if(cputype == -1) {
prom_printf("\nYeee, could not find cpu ARCS component\n");
prom_printf("press a key to reboot\n");
prom_getchar();
romvec->imode();
}
p = prom_getchild(cpup);
while(p) {
switch(p->class) {
case processor:
switch(p->type) {
case Fpu:
printk("FPU<%s> ", p->iname);
break;
default:
break;
};
break;
case cache:
switch(p->type) {
case picache:
printk("ICACHE ");
break;
case pdcache:
printk("DCACHE ");
break;
case sccache:
printk("SCACHE ");
break;
default:
break;
};
break;
default:
break;
};
p = prom_getsibling(p);
}
printk("\n");
}
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