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From cc4b9cdff8665a414ae51101d3a0ca6ed7444a27 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Wed, 24 Aug 2011 13:28:55 +0200
Subject: [PATCH 10/24] MIPS: enable oprofile support on lantiq targets

This patch sets the performance counters irq and HAVE_OPROFILE flag.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
---
 arch/mips/Kconfig      |    1 +
 arch/mips/lantiq/irq.c |    5 +++++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index b122adc..0cf5bbd 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -230,6 +230,7 @@ config LANTIQ
 	select SWAP_IO_SPACE
 	select BOOT_RAW
 	select HAVE_CLK
+	select HAVE_OPROFILE
 	select MIPS_MACHINE
 
 config LASAT
diff --git a/arch/mips/lantiq/irq.c b/arch/mips/lantiq/irq.c
index 17c057f..0b2ed87 100644
--- a/arch/mips/lantiq/irq.c
+++ b/arch/mips/lantiq/irq.c
@@ -40,6 +40,9 @@
 
 #define MAX_EIU			6
 
+/* the performance counter */
+#define LTQ_PERF_IRQ		(INT_NUM_IM4_IRL0 + 31)
+
 /* irqs generated by device attached to the EBU need to be acked in
  * a special manner
  */
@@ -318,6 +321,8 @@ void __init arch_init_irq(void)
 	set_c0_status(IE_SW0 | IE_SW1 | IE_IRQ0 | IE_IRQ1 |
 		IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5);
 #endif
+
+	cp0_perfcount_irq = LTQ_PERF_IRQ;
 }
 
 unsigned int __cpuinit get_c0_compare_int(void)
-- 
1.7.5.4