brcm47xx: add vectored interrupts

This adds support for vectored interrupts in this SoC.
This is supported by the 74K cpus.

Signed-off-by: Hauke Mehrtens <[email protected]>

SVN-Revision: 38975

target/linux/brcm47xx/config-3.10

@@ -42,6 +42,7 @@ CONFIG_CPU_MIPS32=y
 CONFIG_CPU_MIPS32_R1=y
 # CONFIG_CPU_MIPS32_R2 is not set
 CONFIG_CPU_MIPSR1=y
+CONFIG_CPU_MIPSR2_IRQ_VI=y
 CONFIG_CPU_R4K_CACHE_TLB=y
 CONFIG_CPU_R4K_FPU=y
 CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y

target/linux/brcm47xx/patches-3.10/110-MIPS-BCM47XX-add-vint-irq.patch

@@ -0,0 +1,66 @@
+From d9e8fd334d85fc8e4a2867655309a60c8de80883 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <[email protected]>
+Date: Wed, 20 Nov 2013 23:03:35 +0100
+Subject: [PATCH 18/18] bcm47xx: add cpu_has_vint
+
+---
+ arch/mips/bcm47xx/Kconfig |    1 +
+ arch/mips/bcm47xx/irq.c   |   24 ++++++++++++++++++++++++
+ 2 files changed, 25 insertions(+)
+
+--- a/arch/mips/bcm47xx/Kconfig
++++ b/arch/mips/bcm47xx/Kconfig
+@@ -21,6 +21,7 @@ config BCM47XX_SSB
+ config BCM47XX_BCMA
+ 	bool "BCMA Support for Broadcom BCM47XX"
+ 	select SYS_HAS_CPU_MIPS32_R2
++	select CPU_MIPSR2_IRQ_VI
+ 	select BCMA
+ 	select BCMA_HOST_SOC
+ 	select BCMA_DRIVER_MIPS
+--- a/arch/mips/bcm47xx/irq.c
++++ b/arch/mips/bcm47xx/irq.c
+@@ -25,6 +25,7 @@
+ #include <linux/types.h>
+ #include <linux/interrupt.h>
+ #include <linux/irq.h>
++#include <asm/setup.h>
+ #include <asm/irq_cpu.h>
+ #include <bcm47xx.h>
+ 
+@@ -50,6 +51,18 @@ void plat_irq_dispatch(void)
+ 		do_IRQ(6);
+ }
+ 
++#define DEFINE_HWx_IRQDISPATCH(x)					\
++	static void bcm47xx_hw ## x ## _irqdispatch(void)		\
++	{								\
++		do_IRQ(x);						\
++	}
++DEFINE_HWx_IRQDISPATCH(2)
++DEFINE_HWx_IRQDISPATCH(3)
++DEFINE_HWx_IRQDISPATCH(4)
++DEFINE_HWx_IRQDISPATCH(5)
++DEFINE_HWx_IRQDISPATCH(6)
++DEFINE_HWx_IRQDISPATCH(7)
++
+ void __init arch_init_irq(void)
+ {
+ #ifdef CONFIG_BCM47XX_BCMA
+@@ -63,5 +76,16 @@ void __init arch_init_irq(void)
+ 		cp0_compare_irq = 7;
+ 	}
+ #endif
++
+ 	mips_cpu_irq_init();
++
++	if (cpu_has_vint) {
++		pr_info("Setting up vectored interrupts\n");
++		set_vi_handler(2, bcm47xx_hw2_irqdispatch);
++		set_vi_handler(3, bcm47xx_hw3_irqdispatch);
++		set_vi_handler(4, bcm47xx_hw4_irqdispatch);
++		set_vi_handler(5, bcm47xx_hw5_irqdispatch);
++		set_vi_handler(6, bcm47xx_hw6_irqdispatch);
++		set_vi_handler(7, bcm47xx_hw7_irqdispatch);
++	}
+ }