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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/config.h>
#include <linux/kernel.h>
#include <linux/threads.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <asm/page.h>
#include <asm/oplib.h>
#include <asm/system.h>
#include <asm/smp.h>
#include <asm/spitfire.h>
struct prom_cpuinfo linux_cpus[64] __initdata = { { 0 } };
unsigned prom_cpu_nodes[64];
int linux_num_cpus = 0;
extern void cpu_probe(void);
extern void central_probe(void);
void __init device_scan(void)
{
char node_str[128];
int nd, prom_node_cpu, thismid;
int cpu_nds[64]; /* One node for each cpu */
int cpu_ctr = 0;
/* FIX ME FAST... -DaveM */
ioport_resource.end = 0xffffffffffffffffUL;
iomem_resource.end = 0xffffffffffffffffUL;
prom_getstring(prom_root_node, "device_type", node_str, sizeof(node_str));
prom_printf("Booting Linux...\n");
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;
thismid = 0;
if (tlb_type == spitfire) {
prom_getproperty(scan, "upa-portid",
(char *) &thismid, sizeof(thismid));
} else if (tlb_type == cheetah) {
prom_getproperty(scan, "portid",
(char *) &thismid, sizeof(thismid));
}
linux_cpus[cpu_ctr].mid = thismid;
printk("Found CPU %d (node=%08x,mid=%d)\n",
cpu_ctr, (unsigned) scan, thismid);
cpu_ctr++;
}
};
if(cpu_ctr == 0) {
prom_printf("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;
prom_cpu_nodes[0] = prom_node_cpu;
#ifndef CONFIG_SMP
{
extern unsigned long up_clock_tick;
up_clock_tick = prom_getintdefault(prom_node_cpu,
"clock-frequency",
0);
}
#endif
central_probe();
cpu_probe();
}
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