diff --git a/arch/powerpc/boot/oflib.c b/arch/powerpc/boot/oflib.c
new file mode 100644
index 0000000..e9b95d8
--- /dev/null
+++ b/arch/powerpc/boot/oflib.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) Paul Mackerras 1997.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <stddef.h>
+#include "types.h"
+#include "elf.h"
+#include "string.h"
+#include "stdio.h"
+#include "page.h"
+#include "ops.h"
+
+#include "of.h"
+
+static int (*prom) (void *);
+
+void of_init(void *promptr)
+{
+	prom = (int (*)(void *))promptr;
+}
+
+int of_call_prom(const char *service, int nargs, int nret, ...)
+{
+	int i;
+	struct prom_args {
+		const char *service;
+		int nargs;
+		int nret;
+		unsigned int args[12];
+	} args;
+	va_list list;
+
+	args.service = service;
+	args.nargs = nargs;
+	args.nret = nret;
+
+	va_start(list, nret);
+	for (i = 0; i < nargs; i++)
+		args.args[i] = va_arg(list, unsigned int);
+	va_end(list);
+
+	for (i = 0; i < nret; i++)
+		args.args[nargs+i] = 0;
+
+	if (prom(&args) < 0)
+		return -1;
+
+	return (nret > 0)? args.args[nargs]: 0;
+}
+
+static int of_call_prom_ret(const char *service, int nargs, int nret,
+			    unsigned int *rets, ...)
+{
+	int i;
+	struct prom_args {
+		const char *service;
+		int nargs;
+		int nret;
+		unsigned int args[12];
+	} args;
+	va_list list;
+
+	args.service = service;
+	args.nargs = nargs;
+	args.nret = nret;
+
+	va_start(list, rets);
+	for (i = 0; i < nargs; i++)
+		args.args[i] = va_arg(list, unsigned int);
+	va_end(list);
+
+	for (i = 0; i < nret; i++)
+		args.args[nargs+i] = 0;
+
+	if (prom(&args) < 0)
+		return -1;
+
+	if (rets != (void *) 0)
+		for (i = 1; i < nret; ++i)
+			rets[i-1] = args.args[nargs+i];
+
+	return (nret > 0)? args.args[nargs]: 0;
+}
+
+/* returns true if s2 is a prefix of s1 */
+static int string_match(const char *s1, const char *s2)
+{
+	for (; *s2; ++s2)
+		if (*s1++ != *s2)
+			return 0;
+	return 1;
+}
+
+/*
+ * Older OF's require that when claiming a specific range of addresses,
+ * we claim the physical space in the /memory node and the virtual
+ * space in the chosen mmu node, and then do a map operation to
+ * map virtual to physical.
+ */
+static int need_map = -1;
+static ihandle chosen_mmu;
+static phandle memory;
+
+static int check_of_version(void)
+{
+	phandle oprom, chosen;
+	char version[64];
+
+	oprom = finddevice("/openprom");
+	if (oprom == (phandle) -1)
+		return 0;
+	if (getprop(oprom, "model", version, sizeof(version)) <= 0)
+		return 0;
+	version[sizeof(version)-1] = 0;
+	printf("OF version = '%s'\r\n", version);
+	if (!string_match(version, "Open Firmware, 1.")
+	    && !string_match(version, "FirmWorks,3."))
+		return 0;
+	chosen = finddevice("/chosen");
+	if (chosen == (phandle) -1) {
+		chosen = finddevice("/chosen@0");
+		if (chosen == (phandle) -1) {
+			printf("no chosen\n");
+			return 0;
+		}
+	}
+	if (getprop(chosen, "mmu", &chosen_mmu, sizeof(chosen_mmu)) <= 0) {
+		printf("no mmu\n");
+		return 0;
+	}
+	memory = (ihandle) of_call_prom("open", 1, 1, "/memory");
+	if (memory == (ihandle) -1) {
+		memory = (ihandle) of_call_prom("open", 1, 1, "/memory@0");
+		if (memory == (ihandle) -1) {
+			printf("no memory node\n");
+			return 0;
+		}
+	}
+	printf("old OF detected\r\n");
+	return 1;
+}
+
+void *of_claim(unsigned long virt, unsigned long size, unsigned long align)
+{
+	int ret;
+	unsigned int result;
+
+	if (need_map < 0)
+		need_map = check_of_version();
+	if (align || !need_map)
+		return (void *) of_call_prom("claim", 3, 1, virt, size, align);
+
+	ret = of_call_prom_ret("call-method", 5, 2, &result, "claim", memory,
+			       align, size, virt);
+	if (ret != 0 || result == -1)
+		return (void *) -1;
+	ret = of_call_prom_ret("call-method", 5, 2, &result, "claim", chosen_mmu,
+			       align, size, virt);
+	/* 0x12 == coherent + read/write */
+	ret = of_call_prom("call-method", 6, 1, "map", chosen_mmu,
+			   0x12, size, virt, virt);
+	return (void *) virt;
+}
+
+void of_exit(void)
+{
+	of_call_prom("exit", 0, 0);
+}