diff --git a/arch/powerpc/boot/of.c b/arch/powerpc/boot/of.c
index 8fb42b6..d16ee3e 100644
--- a/arch/powerpc/boot/of.c
+++ b/arch/powerpc/boot/of.c
@@ -173,7 +173,7 @@
 	return (void *) virt;
 }
 
-static void *of_try_claim(u32 size)
+static void *of_try_claim(unsigned long size)
 {
 	unsigned long addr = 0;
 
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index ee0f9c2..20e8719 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -23,7 +23,7 @@
 struct platform_ops {
 	void	(*fixups)(void);
 	void	(*image_hdr)(const void *);
-	void *	(*malloc)(u32 size);
+	void *	(*malloc)(unsigned long size);
 	void	(*free)(void *ptr);
 	void *	(*realloc)(void *ptr, unsigned long size);
 	void	(*exit)(void);
@@ -79,8 +79,8 @@
 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);
-void *simple_alloc_init(char *base, u32 heap_size, u32 granularity,
-		u32 max_allocs);
+void *simple_alloc_init(char *base, unsigned long heap_size,
+			unsigned long granularity, unsigned long max_allocs);
 extern void flush_cache(void *, unsigned long);
 int dt_xlate_reg(void *node, int res, unsigned long *addr,
                  unsigned long *size);
@@ -164,7 +164,7 @@
 			(char *)&linuxphandle, sizeof(u32));
 }
 
-static inline void *malloc(u32 size)
+static inline void *malloc(unsigned long size)
 {
 	return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
 }
diff --git a/arch/powerpc/boot/simple_alloc.c b/arch/powerpc/boot/simple_alloc.c
index cfe3a75..65ec135 100644
--- a/arch/powerpc/boot/simple_alloc.c
+++ b/arch/powerpc/boot/simple_alloc.c
@@ -19,24 +19,24 @@
 #define	ENTRY_IN_USE	0x02
 
 static struct alloc_info {
-	u32	flags;
-	u32	base;
-	u32	size;
+	unsigned long	flags;
+	unsigned long	base;
+	unsigned long	size;
 } *alloc_tbl;
 
-static u32 tbl_entries;
-static u32 alloc_min;
-static u32 next_base;
-static u32 space_left;
+static unsigned long tbl_entries;
+static unsigned long alloc_min;
+static unsigned long next_base;
+static unsigned long space_left;
 
 /*
  * First time an entry is used, its base and size are set.
  * An entry can be freed and re-malloc'd but its base & size don't change.
  * Should be smart enough for needs of bootwrapper.
  */
-static void *simple_malloc(u32 size)
+static void *simple_malloc(unsigned long size)
 {
-	u32 i;
+	unsigned long i;
 	struct alloc_info *p = alloc_tbl;
 
 	if (size == 0)
@@ -67,13 +67,14 @@
 
 static struct alloc_info *simple_find_entry(void *ptr)
 {
-	u32 i;
+	unsigned long i;
 	struct alloc_info *p = alloc_tbl;
 
 	for (i=0; i<tbl_entries; i++,p++) {
 		if (!(p->flags & ENTRY_BEEN_USED))
 			break;
-		if ((p->flags & ENTRY_IN_USE) && (p->base == (u32)ptr))
+		if ((p->flags & ENTRY_IN_USE) &&
+		    (p->base == (unsigned long)ptr))
 			return p;
 	}
 	return NULL;
@@ -122,10 +123,10 @@
  * Returns addr of first byte after heap so caller can see if it took
  * too much space.  If so, change args & try again.
  */
-void *simple_alloc_init(char *base, u32 heap_size, u32 granularity,
-		u32 max_allocs)
+void *simple_alloc_init(char *base, unsigned long heap_size,
+			unsigned long granularity, unsigned long max_allocs)
 {
-	u32 heap_base, tbl_size;
+	unsigned long heap_base, tbl_size;
 
 	heap_size = _ALIGN_UP(heap_size, granularity);
 	alloc_min = granularity;
@@ -136,7 +137,7 @@
 	alloc_tbl = (struct alloc_info *)_ALIGN_UP((unsigned long)base, 8);
 	memset(alloc_tbl, 0, tbl_size);
 
-	heap_base = _ALIGN_UP((u32)alloc_tbl + tbl_size, alloc_min);
+	heap_base = _ALIGN_UP((unsigned long)alloc_tbl + tbl_size, alloc_min);
 
 	next_base = heap_base;
 	space_left = heap_size;