freifunkist-firmware/target/linux/lantiq/patches-3.2/0018-MIPS-lantiq-enable-oprofile-support-on-lantiq-target.patch

From e0bd3f1b16fbce1f0f7900a0dd624f9dc8a47f78 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Wed, 24 Aug 2011 13:28:55 +0200
Subject: [PATCH 18/70] MIPS: lantiq: enable oprofile support on lantiq
 targets

This patch sets the performance counters irq and HAVE_OPROFILE flag for Lantiq
SoCs.

Signed-off-by: John Crispin <blogic@openwrt.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 d46f1da..c1ceadb 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -226,6 +226,7 @@ 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)
-- 
1.7.7.1