diff --git a/CHANGELOG b/CHANGELOG
index 8081859..afd34f1 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,9 @@
 Changes since U-Boot 1.1.4:
 ======================================================================
 
+* Add system memory to the PCI region list for AMCC PPC44x CPUs.
+  Enabled it for Yucca board.
+
 * Cleanup config file and bootup output for Yucca board.
 
 * Fix CONFIG_440_GX define usage.
diff --git a/cpu/ppc4xx/405gp_pci.c b/cpu/ppc4xx/405gp_pci.c
index 0ccb3d8..cf5eccb 100644
--- a/cpu/ppc4xx/405gp_pci.c
+++ b/cpu/ppc4xx/405gp_pci.c
@@ -465,17 +465,30 @@
 	hose->first_busno = 0;
 	hose->last_busno = 0xff;
 
+	/* PCI I/O space */
 	pci_set_region(hose->regions + reg_num++,
 		       0x00000000,
 		       PCIX0_IOBASE,
 		       0x10000,
 		       PCI_REGION_IO);
 
+	/* PCI memory space */
 	pci_set_region(hose->regions + reg_num++,
 		       CFG_PCI_TARGBASE,
 		       CFG_PCI_MEMBASE,
 		       0x10000000,
 		       PCI_REGION_MEM );
+
+#if defined(CONFIG_PCI_SYS_MEM_BUS) && defined(CONFIG_PCI_SYS_MEM_PHYS) && \
+	defined(CONFIG_PCI_SYS_MEM_SIZE)
+	/* System memory space */
+	pci_set_region(hose->regions + reg_num++,
+		       CONFIG_PCI_SYS_MEM_BUS,
+		       CONFIG_PCI_SYS_MEM_PHYS,
+		       CONFIG_PCI_SYS_MEM_SIZE,
+		       PCI_REGION_MEM | PCI_REGION_MEMORY );
+#endif
+
 	hose->region_count = reg_num;
 
 	pci_setup_indirect(hose, PCIX0_CFGADR, PCIX0_CFGDATA);
diff --git a/include/configs/yucca.h b/include/configs/yucca.h
index be2e7db..e6d9843 100644
--- a/include/configs/yucca.h
+++ b/include/configs/yucca.h
@@ -75,6 +75,11 @@
 /* #define CFG_PCI_BASE_REGS	0xBEC00000 */	/* internal PCI regs	*/
 /* #define CFG_PCI_BASE_CYCLE	0xBED00000 */	/* internal PCI regs	*/
 
+/* System RAM mapped to PCI space */
+#define CONFIG_PCI_SYS_MEM_BUS	CFG_SDRAM_BASE
+#define CONFIG_PCI_SYS_MEM_PHYS	CFG_SDRAM_BASE
+#define CONFIG_PCI_SYS_MEM_SIZE	(1024 * 1024 * 1024)
+
 #define CFG_FPGA_BASE		0xe2000000	/* epld			*/
 #define CFG_OPER_FLASH		0xe7000000	/* SRAM - OPER Flash	*/