diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 54bdca025c9f..bdcc3639681f 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -107,18 +107,23 @@ void __init setup_dma_zone(const struct machine_desc *mdesc)
 #endif
 }
 
+void __init arch_zone_limits_init(unsigned long *max_zone_pfn)
+{
+#ifdef CONFIG_ZONE_DMA
+	max_zone_pfn[ZONE_DMA] = min(arm_dma_pfn_limit, max_low_pfn);
+#endif
+	max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
+#ifdef CONFIG_HIGHMEM
+	max_zone_pfn[ZONE_HIGHMEM] = max_pfn;
+#endif
+}
+
 static void __init zone_sizes_init(unsigned long min, unsigned long max_low,
 	unsigned long max_high)
 {
 	unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
 
-#ifdef CONFIG_ZONE_DMA
-	max_zone_pfn[ZONE_DMA] = min(arm_dma_pfn_limit, max_low);
-#endif
-	max_zone_pfn[ZONE_NORMAL] = max_low;
-#ifdef CONFIG_HIGHMEM
-	max_zone_pfn[ZONE_HIGHMEM] = max_high;
-#endif
+	arch_zone_limits_init(max_zone_pfn);
 	free_area_init(max_zone_pfn);
 }