--- a/arch/mips/bcm63xx/irq.c
+++ b/arch/mips/bcm63xx/irq.c
@@ -45,8 +45,8 @@ static void __internal_irq_unmask_64(uns
 #define is_ext_irq_cascaded	0
 #define ext_irq_start		0
 #define ext_irq_end		0
-#define ext_irq_count		0
-#define ext_irq_cfg_reg1	0
+#define ext_irq_count		4
+#define ext_irq_cfg_reg1	PERF_EXTIRQ_CFG_REG_6345
 #define ext_irq_cfg_reg2	0
 #endif
 #ifdef CONFIG_BCM63XX_CPU_6348
@@ -122,11 +122,15 @@ static void bcm63xx_init_irq(void)
 		irq_stat_addr += PERF_IRQSTAT_6338_REG;
 		irq_mask_addr += PERF_IRQMASK_6338_REG;
 		irq_bits = 32;
+		ext_irq_count = 4;
+		ext_irq_cfg_reg1 = PERF_EXTIRQ_CFG_REG_6338;
 		break;
 	case BCM6345_CPU_ID:
 		irq_stat_addr += PERF_IRQSTAT_6345_REG;
 		irq_mask_addr += PERF_IRQMASK_6345_REG;
 		irq_bits = 32;
+		ext_irq_count = 4;
+		ext_irq_cfg_reg1 = PERF_EXTIRQ_CFG_REG_6345;
 		break;
 	case BCM6348_CPU_ID:
 		irq_stat_addr += PERF_IRQSTAT_6348_REG;
@@ -413,7 +417,8 @@ static int bcm63xx_external_irq_set_type
 	reg = bcm_perf_readl(regaddr);
 	irq %= 4;
 
-	if (BCMCPU_IS_6348()) {
+	switch (bcm63xx_get_cpu_id()) {
+	case BCM6348_CPU_ID:
 		if (levelsense)
 			reg |= EXTIRQ_CFG_LEVELSENSE_6348(irq);
 		else
@@ -426,9 +431,12 @@ static int bcm63xx_external_irq_set_type
 			reg |= EXTIRQ_CFG_BOTHEDGE_6348(irq);
 		else
 			reg &= ~EXTIRQ_CFG_BOTHEDGE_6348(irq);
-	}
+		break;
 
-	if (BCMCPU_IS_6338() || BCMCPU_IS_6358() || BCMCPU_IS_6368()) {
+	case BCM6338_CPU_ID:
+	case BCM6345_CPU_ID:
+	case BCM6358_CPU_ID:
+	case BCM6368_CPU_ID:
 		if (levelsense)
 			reg |= EXTIRQ_CFG_LEVELSENSE(irq);
 		else
@@ -441,6 +449,9 @@ static int bcm63xx_external_irq_set_type
 			reg |= EXTIRQ_CFG_BOTHEDGE(irq);
 		else
 			reg &= ~EXTIRQ_CFG_BOTHEDGE(irq);
+		break;
+	default:
+		BUG();
 	}
 
 	bcm_perf_writel(reg, regaddr);
--- a/arch/mips/bcm63xx/setup.c
+++ b/arch/mips/bcm63xx/setup.c
@@ -71,6 +71,9 @@ void bcm63xx_machine_reboot(void)
 	case BCM6338_CPU_ID:
 		perf_regs[0] = PERF_EXTIRQ_CFG_REG_6338;
 		break;
+	case BCM6345_CPU_ID:
+		perf_regs[0] = PERF_EXTIRQ_CFG_REG_6345;
+		break;
 	case BCM6348_CPU_ID:
 		perf_regs[0] = PERF_EXTIRQ_CFG_REG_6348;
 		break;
@@ -80,6 +83,9 @@ void bcm63xx_machine_reboot(void)
 	}
 
 	for (i = 0; i < 2; i++) {
+		if (!perf_regs[i])
+			break;
+
 		reg = bcm_perf_readl(perf_regs[i]);
 		if (BCMCPU_IS_6348()) {
 			reg &= ~EXTIRQ_CFG_MASK_ALL_6348;
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
@@ -134,6 +134,7 @@
 
 /* External Interrupt Configuration register */
 #define PERF_EXTIRQ_CFG_REG_6338	0x14
+#define PERF_EXTIRQ_CFG_REG_6345	0x14
 #define PERF_EXTIRQ_CFG_REG_6348	0x14
 #define PERF_EXTIRQ_CFG_REG_6358	0x14
 #define PERF_EXTIRQ_CFG_REG_6368	0x18
