--- a/arch/mips/bcm63xx/cpu.c
+++ b/arch/mips/bcm63xx/cpu.c
@@ -260,8 +260,10 @@ static unsigned int detect_memory_size(v
 	unsigned int cols = 0, rows = 0, is_32bits = 0, banks = 0;
 	u32 val;
 
-	if (BCMCPU_IS_6345())
-		return (8 * 1024 * 1024);
+	if (BCMCPU_IS_6345()) {
+		val = bcm_sdram_readl(SDRAM_MBASE_REG);
+		return (val * 8 * 1024 * 1024);
+	}
 
 	if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) {
 		val = bcm_sdram_readl(SDRAM_CFG_REG);
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
@@ -735,6 +735,8 @@
 #define SDRAM_CFG_BANK_SHIFT		13
 #define SDRAM_CFG_BANK_MASK		(1 << SDRAM_CFG_BANK_SHIFT)
 
+#define SDRAM_MBASE_REG			0xc
+
 #define SDRAM_PRIO_REG			0x2C
 #define SDRAM_PRIO_MIPS_SHIFT		29
 #define SDRAM_PRIO_MIPS_MASK		(1 << SDRAM_PRIO_MIPS_SHIFT)
--- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
+++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
@@ -698,15 +698,9 @@ void __init board_prom_init(void)
 	char cfe_version[32];
 	u32 val;
 
-	/* read base address of boot chip select (0)
-	 * 6345 does not have MPI but boots from standard
-	 * MIPS Flash address */
-	if (BCMCPU_IS_6345())
-		val = 0x1fc00000;
-	else {
-		val = bcm_mpi_readl(MPI_CSBASE_REG(0));
-		val &= MPI_CSBASE_BASE_MASK;
-	}
+	/* read base address of boot chip select (0) */
+	val = bcm_mpi_readl(MPI_CSBASE_REG(0));
+	val &= MPI_CSBASE_BASE_MASK;
 	boot_addr = (u8 *)KSEG1ADDR(val);
 
 	/* dump cfe version */
@@ -881,12 +875,9 @@ int __init board_register_devices(void)
 		bcm63xx_dsp_register(&board.dsp);
 
 	/* read base address of boot chip select (0) */
-	if (BCMCPU_IS_6345())
-		val = 0x1fc00000;
-	else {
-		val = bcm_mpi_readl(MPI_CSBASE_REG(0));
-		val &= MPI_CSBASE_BASE_MASK;
-	}
+	val = bcm_mpi_readl(MPI_CSBASE_REG(0));
+	val &= MPI_CSBASE_BASE_MASK;
+
 	mtd_resources[0].start = val;
 	mtd_resources[0].end = 0x1FFFFFFF;
 
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
@@ -163,7 +163,7 @@ enum bcm63xx_regs_set {
 #define BCM_6345_ENET0_BASE		(0xfffe1800)
 #define BCM_6345_ENETDMA_BASE		(0xfffe2800)
 #define BCM_6345_PCMCIA_BASE		(0xfffe2028)
-#define BCM_6345_MPI_BASE		(0xdeadbeef)
+#define BCM_6345_MPI_BASE		(0xfffe2000)
 #define BCM_6345_OHCI0_BASE		(0xfffe2100)
 #define BCM_6345_OHCI_PRIV_BASE		(0xfffe2200)
 #define BCM_6345_USBH_PRIV_BASE		(0xdeadbeef)