patch-2.4.19 linux-2.4.19/arch/mips/sgi-ip22/ip22-system.c

• Lines: 135
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/mips/sgi-ip22/ip22-system.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/mips/sgi-ip22/ip22-system.c linux-2.4.19/arch/mips/sgi-ip22/ip22-system.c
@@ -0,0 +1,134 @@
+/*
+ * ip22-system.c: Probe the system type using ARCS prom interface library.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+
+#include <asm/cpu.h>
+#include <asm/sgi/sgi.h>
+#include <asm/sgialib.h>
+
+enum sgi_mach sgimach;
+
+struct smatch {
+	char *name;
+	int type;
+};
+
+static struct smatch sgi_cputable[] = {
+	{ "MIPS-R2000", CPU_R2000 },
+	{ "MIPS-R3000", CPU_R3000 },
+	{ "MIPS-R3000A", CPU_R3000A },
+	{ "MIPS-R4000", CPU_R4000SC },
+	{ "MIPS-R4400", CPU_R4400SC },
+	{ "MIPS-R4600", CPU_R4600 },
+	{ "MIPS-R8000", CPU_R8000 },
+	{ "MIPS-R5000", CPU_R5000 },
+	{ "MIPS-R5000A", CPU_R5000A },
+	{ "MIPS-R10000", CPU_R10000 }
+};
+
+static int __init string_to_cpu(char *s)
+{
+	long cnt;
+	char c;
+	int i;
+
+	for(i = 0; i < (sizeof(sgi_cputable) / sizeof(struct smatch)); i++) {
+		if(!strcmp(s, sgi_cputable[i].name))
+			return sgi_cputable[i].type;
+	}
+	prom_printf("\nYeee, could not determine MIPS cpu type <%s>\n", s);
+	prom_printf("press a key to reboot\n");
+	ArcRead(0, &c, 1, &cnt);
+	ArcEnterInteractiveMode();
+	return 0;
+}
+
+/*
+ * We' call this early before loadmmu().  If we do the other way around
+ * the firmware will crash and burn.
+ */
+void __init sgi_sysinit(void)
+{
+	pcomponent *p, *toplev, *cpup = 0;
+	int cputype = -1;
+	long cnt;
+	char c;
+
+
+	/* The root component tells us what machine architecture we
+	 * have here.
+	 */
+	p = ArcGetChild(PROM_NULL_COMPONENT);
+
+	/* Now scan for cpu(s). */
+	printk(KERN_INFO);
+	toplev = p = ArcGetChild(p);
+	while(p) {
+		int ncpus = 0;
+
+		if(p->type == Cpu) {
+			if(++ncpus > 1) {
+				prom_printf("\nYeee, SGI MP not ready yet\n");
+				prom_printf("press a key to reboot\n");
+				ArcRead(0, &c, 1, &cnt);
+				ArcEnterInteractiveMode();
+			}
+			printk("CPU: %s ", p->iname);
+			cpup = p;
+			cputype = string_to_cpu(cpup->iname);
+		}
+		p = ArcGetPeer(p);
+	}
+	if (cputype == -1) {
+		prom_printf("\nYeee, could not find cpu ARCS component\n");
+		prom_printf("press a key to reboot\n");
+		ArcRead(0, &c, 1, &cnt);
+		ArcEnterInteractiveMode();
+	}
+	p = ArcGetChild(cpup);
+	while(p) {
+		switch(p->class) {
+		case processor:
+			switch(p->type) {
+			case Fpu:
+				printk("FPU<%s> ", p->iname);
+				break;
+
+			default:
+				break;
+			};
+			break;
+
+		case cache:
+			switch(p->type) {
+			case picache:
+				printk("ICACHE ");
+				break;
+
+			case pdcache:
+				printk("DCACHE ");
+				break;
+
+			case sccache:
+				printk("SCACHE ");
+				break;
+
+			default:
+				break;
+
+			};
+			break;
+
+		default:
+			break;
+		};
+		p = ArcGetPeer(p);
+	}
+	printk("\n");
+}