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authorRobin Getz <robin.getz@analog.com>2007-07-25 11:03:28 +0800
committerBryan Wu <bryan.wu@analog.com>2007-07-25 11:03:28 +0800
commit518039bc24cbb9ce34665814fe120eac50bedd9a (patch)
tree6b089a05025ae224d6636b6dc9d95e7c9e4677eb /arch/blackfin/kernel/irqchip.c
parentf16295e7e7f2a2a15876f570f10d6dc8f1f36ab8 (diff)
downloadlinux-2.6.38-lt-ux500-518039bc24cbb9ce34665814fe120eac50bedd9a.tar.gz
Blackfin arch: Add ability to expend the hardware trace buffer
Add ability to expend the hardware trace buffer via a configurable software buffer - so you can have lots of history when a crash occurs. The interesting way we do printk in the traps.c confusese the checking script Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/kernel/irqchip.c')
-rw-r--r--arch/blackfin/kernel/irqchip.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c
index 1fc001c7abd..462ae41144c 100644
--- 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
}