diff --git a/arch/mips/arc/tree.c b/arch/mips/arc/tree.c
new file mode 100644
index 0000000..2aedd4f
--- /dev/null
+++ b/arch/mips/arc/tree.c
@@ -0,0 +1,127 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * PROM component device tree code.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#include <linux/init.h>
+#include <asm/arc/types.h>
+#include <asm/sgialib.h>
+
+#undef DEBUG_PROM_TREE
+
+pcomponent * __init
+ArcGetPeer(pcomponent *Current)
+{
+	if (Current == PROM_NULL_COMPONENT)
+		return PROM_NULL_COMPONENT;
+
+	return (pcomponent *) ARC_CALL1(next_component, Current);
+}
+
+pcomponent * __init
+ArcGetChild(pcomponent *Current)
+{
+	return (pcomponent *) ARC_CALL1(child_component, Current);
+}
+
+pcomponent * __init
+ArcGetParent(pcomponent *Current)
+{
+	if (Current == PROM_NULL_COMPONENT)
+		return PROM_NULL_COMPONENT;
+
+	return (pcomponent *) ARC_CALL1(parent_component, Current);
+}
+
+LONG __init
+ArcGetConfigurationData(VOID *Buffer, pcomponent *Current)
+{
+	return ARC_CALL2(component_data, Buffer, Current);
+}
+
+pcomponent * __init
+ArcAddChild(pcomponent *Current, pcomponent *Template, VOID *ConfigurationData)
+{
+	return (pcomponent *)
+	       ARC_CALL3(child_add, Current, Template, ConfigurationData);
+}
+
+LONG __init
+ArcDeleteComponent(pcomponent *ComponentToDelete)
+{
+	return ARC_CALL1(comp_del, ComponentToDelete);
+}
+
+pcomponent * __init
+ArcGetComponent(CHAR *Path)
+{
+	return (pcomponent *)ARC_CALL1(component_by_path, Path);
+}
+
+#ifdef DEBUG_PROM_TREE
+
+static char *classes[] = {
+	"system", "processor", "cache", "adapter", "controller", "peripheral",
+	"memory"
+};
+
+static char *types[] = {
+	"arc", "cpu", "fpu", "picache", "pdcache", "sicache", "sdcache",
+	"sccache", "memdev", "eisa adapter", "tc adapter", "scsi adapter",
+	"dti adapter", "multi-func adapter", "disk controller",
+	"tp controller", "cdrom controller", "worm controller",
+	"serial controller", "net controller", "display controller",
+	"parallel controller", "pointer controller", "keyboard controller",
+	"audio controller", "misc controller", "disk peripheral",
+	"floppy peripheral", "tp peripheral", "modem peripheral",
+	"monitor peripheral", "printer peripheral", "pointer peripheral",
+	"keyboard peripheral", "terminal peripheral", "line peripheral",
+	"net peripheral", "misc peripheral", "anonymous"
+};
+
+static char *iflags[] = {
+	"bogus", "read only", "removable", "console in", "console out",
+	"input", "output"
+};
+
+static void __init
+dump_component(pcomponent *p)
+{
+	prom_printf("[%p]:class<%s>type<%s>flags<%s>ver<%d>rev<%d>",
+		    p, classes[p->class], types[p->type],
+		    iflags[p->iflags], p->vers, p->rev);
+	prom_printf("key<%08lx>\n\tamask<%08lx>cdsize<%d>ilen<%d>iname<%s>\n",
+		    p->key, p->amask, (int)p->cdsize, (int)p->ilen, p->iname);
+}
+
+static void __init
+traverse(pcomponent *p, int op)
+{
+	dump_component(p);
+	if(ArcGetChild(p))
+		traverse(ArcGetChild(p), 1);
+	if(ArcGetPeer(p) && op)
+		traverse(ArcGetPeer(p), 1);
+}
+
+void __init
+prom_testtree(void)
+{
+	pcomponent *p;
+
+	p = ArcGetChild(PROM_NULL_COMPONENT);
+	dump_component(p);
+	p = ArcGetChild(p);
+	while(p) {
+		dump_component(p);
+		p = ArcGetPeer(p);
+	}
+}
+
+#endif /* DEBUG_PROM_TREE  */