patch-2.1.30 linux/arch/sparc64/kernel/devices.c

• Lines: 66
• Date: Thu Mar 20 16:43:31 1997
• Orig file: v2.1.29/linux/arch/sparc64/kernel/devices.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.29/linux/arch/sparc64/kernel/devices.c linux/arch/sparc64/kernel/devices.c
@@ -0,0 +1,65 @@
+/* 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 <linux/init.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);
+
+__initfunc(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;
+
+	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 %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, "mid", (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);
+				cpu_ctr++;
+			}
+		};
+		if(cpu_ctr == 0) {
+			printk("No CPU nodes found, cannot continue.\n");
+			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 mem_start;
+}