Blackfin arch: Add ability to expend the hardware trace buffer

[powerpc.git] / arch / blackfin / kernel / irqchip.c

diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c
index 1fc001c..462ae41 100644 (file)
--- a/arch/blackfin/kernel/irqchip.c
+++ b/arch/blackfin/kernel/irqchip.c
@@ -34,6 +34,7 @@
 #include <linux/kallsyms.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
+#include <asm/trace.h>
 
 static unsigned long irq_err_count;
 static spinlock_t irq_controller_lock;
@@ -144,4 +145,12 @@ void __init init_IRQ(void)
        }
 
        init_arch_irq();
+
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
+       /* Now that evt_ivhw is set up, turn this on */
+       trace_buff_offset = 0;
+       bfin_write_TBUFCTL(BFIN_TRACE_ON);
+       printk(KERN_INFO "Hardware Trace expanded to %ik\n",
+         1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN);
+#endif
 }