diff --git a/arch/arm/include/asm/arch-mx25/imx-regs.h b/arch/arm/include/asm/arch-mx25/imx-regs.h
index cf7bb5a..206ac76 100644
--- a/arch/arm/include/asm/arch-mx25/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx25/imx-regs.h
@@ -253,6 +253,7 @@
 #define IMX_PWM1_BASE		(0x53FE0000)
 #define IMX_RTIC_BASE		(0x53FEC000)
 #define IMX_IIM_BASE		(0x53FF0000)
+#define IIM_BASE_ADDR		IMX_IIM_BASE
 #define IMX_USB_BASE		(0x53FF4000)
 #define IMX_USB_PORT_OFFSET	0x200
 #define IMX_CSI_BASE		(0x53FF8000)
diff --git a/arch/arm/include/asm/arch-mx27/imx-regs.h b/arch/arm/include/asm/arch-mx27/imx-regs.h
index aee058f..8867e9f 100644
--- a/arch/arm/include/asm/arch-mx27/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx27/imx-regs.h
@@ -222,6 +222,7 @@
 #define IMX_PLL_BASE		(0x27000 + IMX_IO_BASE)
 #define IMX_SYSTEM_CTL_BASE	(0x27800 + IMX_IO_BASE)
 #define IMX_IIM_BASE		(0x28000 + IMX_IO_BASE)
+#define IIM_BASE_ADDR		IMX_IIM_BASE
 #define IMX_FEC_BASE		(0x2b000 + IMX_IO_BASE)
 
 #define IMX_ESD_BASE		(0xD8001000)
diff --git a/arch/arm/include/asm/arch-mx31/imx-regs.h b/arch/arm/include/asm/arch-mx31/imx-regs.h
index 5d8d8f4..67fddac 100644
--- a/arch/arm/include/asm/arch-mx31/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx31/imx-regs.h
@@ -574,6 +574,7 @@
 #define CCMR_CKIH	(2 << 1)
 
 #define MX31_IIM_BASE_ADDR	0x5001C000
+#define IIM_BASE_ADDR		MX31_IIM_BASE_ADDR
 
 #define PDR0_CSI_PODF(x)	(((x) & 0x3f) << 26)
 #define PDR0_CSI_PRDF(x)	(((x) & 0x7) << 23)
diff --git a/arch/powerpc/include/asm/immap_512x.h b/arch/powerpc/include/asm/immap_512x.h
index d96e536..8248219 100644
--- a/arch/powerpc/include/asm/immap_512x.h
+++ b/arch/powerpc/include/asm/immap_512x.h
@@ -1272,4 +1272,6 @@
 #define CONFIG_SYS_MPC512x_USB_ADDR \
 			(CONFIG_SYS_IMMR + CONFIG_SYS_MPC512x_USB_OFFSET)
 
+#define IIM_BASE_ADDR	(CONFIG_SYS_IMMR + offsetof(immap_t, iim))
+
 #endif /* __IMMAP_512x__ */