/* 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/string.h>#include <linux/init.h>#include <asm/page.h>#include <asm/oplib.h>#include <asm/smp.h>#include <asm/system.h>struct prom_cpuinfo linux_cpus[32];int linux_num_cpus = 0;extern void cpu_probe(void);extern void clock_stop_probe(void); /* tadpole.c */extern void sun4c_probe_memerr_reg(void);unsigned long __initdevice_scan(unsigned long mem_start){	char node_str[128];	int thismid;	prom_getstring(prom_root_node, "device_type", node_str, sizeof(node_str));	prom_printf("Booting Linux...\n");	if(strcmp(node_str, "cpu") == 0) {		linux_num_cpus++;	} else {		int scan;		scan = prom_getchild(prom_root_node);		/* One can look it up in PROM instead */		/* prom_printf("root child is %08lx\n", (unsigned long) scan); */		while((scan = prom_getsibling(scan)) != 0) {			prom_getstring(scan, "device_type", node_str, sizeof(node_str));			if(strcmp(node_str, "cpu") == 0) {				linux_cpus[linux_num_cpus].prom_node = scan;				prom_getproperty(scan, "mid", (char *) &thismid, sizeof(thismid));				linux_cpus[linux_num_cpus].mid = thismid;				/* prom_printf("Found CPU %d <node=%08lx,mid=%d>\n", linux_num_cpus, (unsigned long) scan, thismid); */				printk("Found CPU %d <node=%08lx,mid=%d>\n", linux_num_cpus, (unsigned long) scan, thismid);				linux_num_cpus++;			}		}		if(linux_num_cpus == 0) {			if (sparc_cpu_model == sun4d) {				scan = prom_getchild(prom_root_node);				for (scan = prom_searchsiblings(scan, "cpu-unit"); scan;				     scan = prom_searchsiblings(prom_getsibling(scan), "cpu-unit")) {					int node = prom_getchild(scan);					prom_getstring(node, "device_type", node_str, sizeof(node_str));					if (strcmp(node_str, "cpu") == 0) {						prom_getproperty(node, "cpu-id", (char *) &thismid, sizeof(thismid));						linux_cpus[linux_num_cpus].prom_node = node;						linux_cpus[linux_num_cpus].mid = thismid;						/* prom_printf("Found CPU %d <node=%08lx,mid=%d>\n", 							       linux_num_cpus, (unsigned long) node, thismid); */						printk("Found CPU %d <node=%08lx,mid=%d>\n", 						       linux_num_cpus, (unsigned long) node, thismid);						linux_num_cpus++;					}				}			}		}		if(linux_num_cpus == 0) {			printk("No CPU nodes found, cannot continue.\n");			/* Probably a sun4e, Sun is trying to trick us ;-) */			halt();		}		printk("Found %d CPU prom device tree node(s).\n", linux_num_cpus);	};	cpu_probe();#ifdef CONFIG_SUN_AUXIO	{		extern void auxio_probe(void);		extern void auxio_power_probe(void);		auxio_probe();		auxio_power_probe();	}#endif	clock_stop_probe();	if (ARCH_SUN4C_SUN4)		sun4c_probe_memerr_reg();	return mem_start;}