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/* devices.c: Initial scan of the prom device tree for important
 *            Sparc device nodes which we need to find.
 *
 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
 */
 
#include <linux/kernel.h>
#include <linux/tasks.h>
#include <linux/config.h>
 
#include <asm/page.h>
#include <asm/oplib.h>
#include <asm/smp.h>
#include <asm/system.h>
 
struct prom_cpuinfo linux_cpus[NCPUS];
int linux_num_cpus;
 
extern void cpu_probe(void);
extern void clock_stop_probe(void); /* tadpole.c */
 
unsigned long
device_scan(unsigned long mem_start)
{
	char node_str[128];
	int nd, prom_node_cpu, thismid;
	int cpu_nds[NCPUS];  /* One node for each cpu */
	int cpu_ctr = 0;
 
#if CONFIG_AP1000
        printk("Not scanning device list for CPUs\n");
	linux_num_cpus = 1;
	return;
#endif
 
	prom_getstring(prom_root_node, "device_type", node_str, sizeof(node_str));
 
	if(strcmp(node_str, "cpu") == 0) {
		cpu_nds[0] = prom_root_node;
		cpu_ctr++;
	} else {
		int scan;
		scan = prom_getchild(prom_root_node);
		prom_printf("root child is %08lx\n", (unsigned long) scan);
		nd = 0;
		while((scan = prom_getsibling(scan)) != 0) {
			prom_getstring(scan, "device_type", node_str, sizeof(node_str));
			if(strcmp(node_str, "cpu") == 0) {
				cpu_nds[cpu_ctr] = scan;
				linux_cpus[cpu_ctr].prom_node = scan;
				prom_getproperty(scan, "mid", (char *) &thismid, sizeof(thismid));
				linux_cpus[cpu_ctr].mid = thismid;
				prom_printf("Found CPU %d <node=%08lx,mid=%d>\n",
					    cpu_ctr, (unsigned long) scan,
					    thismid);
				cpu_ctr++;
			}
		};
		if(cpu_ctr == 0) {
			printk("No CPU nodes found, cannot continue.\n");
			/* Probably a sun4d or sun4e, Sun is trying to trick us ;-) */
			halt();
		}
		printk("Found %d CPU prom device tree node(s).\n", cpu_ctr);
	};
	prom_node_cpu = cpu_nds[0];
 
	linux_num_cpus = cpu_ctr;
 
	cpu_probe();
#if CONFIG_SUN_AUXIO
	{
	  extern void auxio_probe(void);
	  auxio_probe();
	}
#endif
	clock_stop_probe();
 
	return mem_start;
}