diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
index 946f4d778f71648249e99588db97cbeb4c9ca941..3281fb4b12e3342a6dd45af7c17bcf5d16aec4fe 100644
--- a/arch/arm/include/asm/mach/arch.h
+++ b/arch/arm/include/asm/mach/arch.h
@@ -23,6 +23,10 @@ struct machine_desc {
 
 	unsigned int		nr_irqs;	/* number of IRQs */
 
+#ifdef CONFIG_ZONE_DMA
+	unsigned long		dma_zone_size;	/* size of DMA-able area */
+#endif
+
 	unsigned int		video_start;	/* start of video RAM	*/
 	unsigned int		video_end;	/* end of video RAM	*/
 
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index ed11fb08b05a5b2d3fd022d981970c01c9fdc088..e0db84d7e38482df8f55db88aeeb9168b89129c2 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -916,6 +916,12 @@ void __init setup_arch(char **cmdline_p)
 	cpu_init();
 	tcm_init();
 
+#ifdef CONFIG_ZONE_DMA
+	if (mdesc->dma_zone_size) {
+		extern unsigned long arm_dma_zone_size;
+		arm_dma_zone_size = mdesc->dma_zone_size;
+	}
+#endif
 #ifdef CONFIG_MULTI_IRQ_HANDLER
 	handle_arch_irq = mdesc->handle_irq;
 #endif