openwrt/target/linux/brcm63xx/patches-3.10/320-MIPS-BCM63XX-wire-up-the-second-CPU-s-irq-line.patch

From 70c33fe0df8d14e40f3ca92ce56a668d66184858 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Fri, 26 Apr 2013 12:03:15 +0200
Subject: [PATCH 12/14] MIPS: BCM63XX: wire up the second cpu's irq line

---
 arch/mips/bcm63xx/irq.c |   50 ++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 41 insertions(+), 9 deletions(-)

--- a/arch/mips/bcm63xx/irq.c
+++ b/arch/mips/bcm63xx/irq.c
@@ -363,13 +363,20 @@ static void __internal_irq_mask_##width(
 	u32 val;							\
 	unsigned reg = (irq / 32) ^ (width/32 - 1);			\
 	unsigned bit = irq & 0x1f;					\
-	u32 irq_mask_addr = get_irq_mask_addr(0);			\
 	unsigned long flags;						\
+	int cpu;							\
 									\
 	spin_lock_irqsave(&ipic_lock, flags);				\
-	val = bcm_readl(irq_mask_addr + reg * sizeof(u32));		\
-	val &= ~(1 << bit);						\
-	bcm_writel(val, irq_mask_addr + reg * sizeof(u32));		\
+	for_each_present_cpu(cpu) {					\
+		u32 irq_mask_addr = get_irq_mask_addr(cpu);		\
+									\
+		if (!irq_mask_addr)					\
+			break;						\
+									\
+		val = bcm_readl(irq_mask_addr + reg * sizeof(u32));	\
+		val &= ~(1 << bit);					\
+		bcm_writel(val, irq_mask_addr + reg * sizeof(u32));	\
+	}								\
 	spin_unlock_irqrestore(&ipic_lock, flags);			\
 }									\
 									\
@@ -378,13 +385,23 @@ static void __internal_irq_unmask_##widt
 	u32 val;							\
 	unsigned reg = (irq / 32) ^ (width/32 - 1);			\
 	unsigned bit = irq & 0x1f; 					\
-	u32 irq_mask_addr = get_irq_mask_addr(0);			\
 	unsigned long flags;						\
+	int cpu;							\
 									\
 	spin_lock_irqsave(&ipic_lock, flags);				\
-	val = bcm_readl(irq_mask_addr + reg * sizeof(u32));		\
-	val |= (1 << bit); 						\
-	bcm_writel(val, irq_mask_addr + reg * sizeof(u32));		\
+	for_each_present_cpu(cpu) {					\
+		u32 irq_mask_addr = get_irq_mask_addr(cpu);		\
+									\
+		if (!irq_mask_addr)					\
+			break;						\
+									\
+		val = bcm_readl(irq_mask_addr + reg * sizeof(u32));	\
+		if (cpu_online(cpu))					\
+			val |= (1 << bit); 				\
+		else							\
+			val &= ~(1 << bit);				\
+		bcm_writel(val, irq_mask_addr + reg * sizeof(u32));	\
+	}								\
 	spin_unlock_irqrestore(&ipic_lock, flags);			\
 }
 
@@ -409,7 +426,10 @@ asmlinkage void plat_irq_dispatch(void)
 			do_IRQ(1);
 		if (cause & CAUSEF_IP2)
 			dispatch_internal(0);
-		if (!is_ext_irq_cascaded) {
+		if (is_ext_irq_cascaded) {
+			if (cause & CAUSEF_IP3)
+				dispatch_internal(1);
+		} else {
 			if (cause & CAUSEF_IP3)
 				do_IRQ(IRQ_EXT_0);
 			if (cause & CAUSEF_IP4)
@@ -622,6 +642,14 @@ static struct irqaction cpu_ip2_cascade_
 	.flags		= IRQF_NO_THREAD,
 };
 
+#ifdef CONFIG_SMP
+static struct irqaction cpu_ip3_cascade_action = {
+	.handler	= no_action,
+	.name		= "cascade_ip3",
+	.flags		= IRQF_NO_THREAD,
+};
+#endif
+
 static struct irqaction cpu_ext_cascade_action = {
 	.handler	= no_action,
 	.name		= "cascade_extirq",
@@ -648,4 +676,8 @@ void __init arch_init_irq(void)
 	}
 
 	setup_irq(MIPS_CPU_IRQ_BASE + 2, &cpu_ip2_cascade_action);
+#ifdef CONFIG_SMP
+	if (is_ext_irq_cascaded)
+		setup_irq(MIPS_CPU_IRQ_BASE + 3, &cpu_ip3_cascade_action);
+#endif
 }