diff --git a/arch/arm/mach-socfpga/include/mach/firewall.h b/arch/arm/mach-socfpga/include/mach/firewall.h
index 516bd1c0e1..430341bea1 100644
--- a/arch/arm/mach-socfpga/include/mach/firewall.h
+++ b/arch/arm/mach-socfpga/include/mach/firewall.h
@@ -95,6 +95,13 @@ struct socfpga_firwall_l4_sys {
 
 #define CCU_IOM_MPRT_ADMASK_MEM_RAM0		0x18628
 
+#define CCU_TCU_MPRT_ADBASE_MEMSPACE0		0x2c520
+#define CCU_TCU_MPRT_ADBASE_MEMSPACE1A		0x2c540
+#define CCU_TCU_MPRT_ADBASE_MEMSPACE1B		0x2c560
+#define CCU_TCU_MPRT_ADBASE_MEMSPACE1C		0x2c580
+#define CCU_TCU_MPRT_ADBASE_MEMSPACE1D		0x2c5a0
+#define CCU_TCU_MPRT_ADBASE_MEMSPACE1E		0x2c5c0
+
 #define CCU_ADMASK_P_MASK			BIT(0)
 #define CCU_ADMASK_NS_MASK			BIT(1)
 
diff --git a/drivers/ddr/altera/sdram_s10.c b/drivers/ddr/altera/sdram_s10.c
index b709758db7..cf586ac860 100644
--- a/drivers/ddr/altera/sdram_s10.c
+++ b/drivers/ddr/altera/sdram_s10.c
@@ -105,6 +105,20 @@ int sdram_mmr_init_full(struct udevice *dev)
 	clrbits_le32(CCU_REG_ADDR(CCU_IOM_MPRT_ADBASE_MEMSPACE1E),
 		     CCU_ADBASE_DI_MASK);
 
+	/* Enable access to DDR from TCU */
+	clrbits_le32(CCU_REG_ADDR(CCU_TCU_MPRT_ADBASE_MEMSPACE0),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_TCU_MPRT_ADBASE_MEMSPACE1A),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_TCU_MPRT_ADBASE_MEMSPACE1B),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_TCU_MPRT_ADBASE_MEMSPACE1C),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_TCU_MPRT_ADBASE_MEMSPACE1D),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_TCU_MPRT_ADBASE_MEMSPACE1E),
+		     CCU_ADBASE_DI_MASK);
+
 	/* this enables nonsecure access to DDR */
 	/* mpuregion0addr_limit */
 	FW_MPU_DDR_SCR_WRITEL(0xFFFF0000, FW_MPU_DDR_SCR_MPUREGION0ADDR_LIMIT);