diff --git a/arch/powerpc/boot/crt0.S b/arch/powerpc/boot/crt0.S
index 25ad745..bd7770b 100644
--- a/arch/powerpc/boot/crt0.S
+++ b/arch/powerpc/boot/crt0.S
@@ -88,5 +88,4 @@
 	bl	platform_init
 
 	/* Call start */
-	mr	r3,r1
 	b	start
diff --git a/arch/powerpc/boot/main.c b/arch/powerpc/boot/main.c
index 33c7329..e1df8fe 100644
--- a/arch/powerpc/boot/main.c
+++ b/arch/powerpc/boot/main.c
@@ -17,6 +17,7 @@
 #include "ops.h"
 #include "gunzip_util.h"
 #include "flatdevtree.h"
+#include "reg.h"
 
 extern char _start[];
 extern char __bss_start[];
@@ -247,7 +248,7 @@
 struct console_ops console_ops;
 struct loader_info loader_info;
 
-void start(void *sp)
+void start(void)
 {
 	struct addr_range vmlinux, initrd;
 	kernel_entry_t kentry;
@@ -260,7 +261,7 @@
 		platform_ops.fixups();
 
 	printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r",
-	       _start, sp);
+	       _start, get_sp());
 
 	vmlinux = prep_kernel();
 	initrd = prep_initrd(vmlinux, loader_info.initrd_addr,
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index ea5368c..592dc6c 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -73,7 +73,7 @@
 };
 extern struct loader_info loader_info;
 
-void start(void *sp);
+void start(void);
 int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device);
 int serial_console_init(void);
 int ns16550_console_init(void *devp, struct serial_console_data *scdp);
diff --git a/arch/powerpc/boot/reg.h b/arch/powerpc/boot/reg.h
new file mode 100644
index 0000000..d3cd9ee
--- /dev/null
+++ b/arch/powerpc/boot/reg.h
@@ -0,0 +1,22 @@
+#ifndef _PPC_BOOT_REG_H
+#define _PPC_BOOT_REG_H
+/*
+ * Copyright 2007 Davud Gibson, IBM Corporation.
+ *
+ * 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.
+ */
+
+static inline u32 mfpvr(void)
+{
+	u32 pvr;
+	asm volatile ("mfpvr	%0" : "=r"(pvr));
+	return pvr;
+}
+
+register void *__stack_pointer asm("r1");
+#define get_sp()	(__stack_pointer)
+
+#endif	/* _PPC_BOOT_REG_H */