diff --git a/include/asm-m32r/mmzone.h b/include/asm-m32r/mmzone.h
new file mode 100644
index 0000000..ebf0228
--- /dev/null
+++ b/include/asm-m32r/mmzone.h
@@ -0,0 +1,80 @@
+/*
+ * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
+ *
+ */
+
+#ifndef _ASM_MMZONE_H_
+#define _ASM_MMZONE_H_
+
+#include <asm/smp.h>
+
+#ifdef CONFIG_DISCONTIGMEM
+
+extern struct pglist_data *node_data[];
+#define NODE_DATA(nid)		(node_data[nid])
+
+#define node_localnr(pfn, nid)	((pfn) - NODE_DATA(nid)->node_start_pfn)
+#define node_mem_map(nid)	(NODE_DATA(nid)->node_mem_map)
+#define node_start_pfn(nid)	(NODE_DATA(nid)->node_start_pfn)
+#define node_end_pfn(nid)						\
+({									\
+	pg_data_t *__pgdat = NODE_DATA(nid);				\
+	__pgdat->node_start_pfn + __pgdat->node_spanned_pages - 1;	\
+})
+
+#define local_mapnr(kvaddr)						\
+({									\
+	unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT;		\
+	(__pfn - node_start_pfn(pfn_to_nid(__pfn)));			\
+})
+
+#define pfn_to_page(pfn)						\
+({									\
+	unsigned long __pfn = pfn;					\
+	int __node  = pfn_to_nid(__pfn);				\
+	&node_mem_map(__node)[node_localnr(__pfn,__node)];		\
+})
+
+#define page_to_pfn(pg)							\
+({									\
+	struct page *__page = pg;					\
+	struct zone *__zone = page_zone(__page);			\
+	(unsigned long)(__page - __zone->zone_mem_map)			\
+		+ __zone->zone_start_pfn;				\
+})
+#define pmd_page(pmd)		(pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+/*
+ * pfn_valid should be made as fast as possible, and the current definition
+ * is valid for machines that are NUMA, but still contiguous, which is what
+ * is currently supported. A more generalised, but slower definition would
+ * be something like this - mbligh:
+ * ( pfn_to_pgdat(pfn) && ((pfn) < node_end_pfn(pfn_to_nid(pfn))) )
+ */
+#if 1	/* M32R_FIXME */
+#define pfn_valid(pfn)	(1)
+#else
+#define pfn_valid(pfn)	((pfn) < num_physpages)
+#endif
+
+/*
+ * generic node memory support, the following assumptions apply:
+ */
+
+static __inline__ int pfn_to_nid(unsigned long pfn)
+{
+	int node;
+
+	for (node = 0 ; node < MAX_NUMNODES ; node++)
+		if (pfn >= node_start_pfn(node) && pfn <= node_end_pfn(node))
+			break;
+
+	return node;
+}
+
+static __inline__ struct pglist_data *pfn_to_pgdat(unsigned long pfn)
+{
+	return(NODE_DATA(pfn_to_nid(pfn)));
+}
+
+#endif /* CONFIG_DISCONTIGMEM */
+#endif /* _ASM_MMZONE_H_ */