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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/init.h>
#include <asm/page.h>
#include <asm/oplib.h>
#include <asm/system.h>
#include <asm/smp.h>
struct prom_cpuinfo linux_cpus[NR_CPUS];
int linux_num_cpus = 0;
extern void cpu_probe(void);
extern unsigned long central_probe(unsigned long);
__initfunc(unsigned long
device_scan(unsigned long mem_start))
{
char node_str[128];
int nd, prom_node_cpu, thismid;
int cpu_nds[NR_CPUS]; /* One node for each cpu */
int cpu_ctr = 0;
prom_getstring(prom_root_node, "device_type", node_str, sizeof(node_str));
if(strcmp(node_str, "cpu") == 0) {
cpu_nds[0] = prom_root_node;
linux_cpus[0].prom_node = prom_root_node;
linux_cpus[0].mid = 0;
cpu_ctr++;
} else {
int scan;
scan = prom_getchild(prom_root_node);
prom_printf("root child is %08x\n", (unsigned) 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, "upa-portid",
(char *) &thismid, sizeof(thismid));
linux_cpus[cpu_ctr].mid = thismid;
prom_printf("Found CPU %d <node=%08x,mid=%d>\n",
cpu_ctr, (unsigned) scan,
thismid);
printk("Found CPU %d <node=%08x,mid=%d>\n",
cpu_ctr, (unsigned) scan, thismid);
cpu_ctr++;
}
};
if(cpu_ctr == 0) {
printk("No CPU nodes found, cannot continue.\n");
prom_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();
return central_probe(mem_start);
}
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