MIPS: lantiq: enable oprofile support on lantiq targets
This patch sets the performance counters irq on Lantiq SoCs.
Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3720/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/lantiq/irq.c b/arch/mips/lantiq/irq.c
index b6b1c72..bfd4ad1 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
*/
@@ -316,6 +319,9 @@
set_c0_status(IE_SW0 | IE_SW1 | IE_IRQ0 | IE_IRQ1 |
IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5);
#endif
+
+ /* tell oprofile which irq to use */
+ cp0_perfcount_irq = LTQ_PERF_IRQ;
}
unsigned int __cpuinit get_c0_compare_int(void)