diff --git a/arch/arm/include/asm/arch-omap4/omap4.h b/arch/arm/include/asm/arch-omap4/omap4.h
index d0c808d..a30bb33 100644
--- a/arch/arm/include/asm/arch-omap4/omap4.h
+++ b/arch/arm/include/asm/arch-omap4/omap4.h
@@ -42,6 +42,10 @@
 #define OMAP44XX_L4_WKUP_BASE	0x4A300000
 #define OMAP44XX_L4_PER_BASE	0x48000000
 
+#define OMAP44XX_DRAM_ADDR_SPACE_START	0x80000000
+#define OMAP44XX_DRAM_ADDR_SPACE_END	0xD0000000
+
+
 /* CONTROL */
 #define CTRL_BASE		(OMAP44XX_L4_CORE_BASE + 0x2000)
 #define CONTROL_PADCONF_CORE	(OMAP44XX_L4_CORE_BASE + 0x100000)
@@ -66,6 +70,12 @@
 /* GPMC */
 #define OMAP44XX_GPMC_BASE	0x50000000
 
+/* DMM */
+#define OMAP44XX_DMM_BASE		0x4E000000
+#define DMM_LISA_MAP_BASE		(OMAP44XX_DMM_BASE + 0x40)
+#define DMM_LISA_MAP_SYS_SIZE_MASK	(7 << 20)
+#define DMM_LISA_MAP_SYS_SIZE_SHIFT	20
+#define DMM_LISA_MAP_SYS_ADDR_MASK	(0xFF << 24)
 /*
  * Hardware Register Details
  */