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authorRobin Getz <robin.getz@analog.com>2007-07-24 23:03:28 -0400
committerBryan Wu <bryan.wu@analog.com>2007-07-24 23:03:28 -0400
commit518039bc24cbb9ce34665814fe120eac50bedd9a (patch)
tree6b089a05025ae224d6636b6dc9d95e7c9e4677eb /arch/blackfin/kernel/irqchip.c
parentf16295e7e7f2a2a15876f570f10d6dc8f1f36ab8 (diff)
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 1fc001c7abda..462ae41144c7 100644
--- a/arch/blackfin/kernel/irqchip.c
+++ b/arch/blackfin/kernel/irqchip.c
@@ -34,6 +34,7 @@
34#include <linux/kallsyms.h> 34#include <linux/kallsyms.h>
35#include <linux/interrupt.h> 35#include <linux/interrupt.h>
36#include <linux/irq.h> 36#include <linux/irq.h>
37#include <asm/trace.h>
37 38
38static unsigned long irq_err_count; 39static unsigned long irq_err_count;
39static spinlock_t irq_controller_lock; 40static spinlock_t irq_controller_lock;
@@ -144,4 +145,12 @@ void __init init_IRQ(void)
144 } 145 }
145 146
146 init_arch_irq(); 147 init_arch_irq();
148
149#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
150 /* Now that evt_ivhw is set up, turn this on */
151 trace_buff_offset = 0;
152 bfin_write_TBUFCTL(BFIN_TRACE_ON);
153 printk(KERN_INFO "Hardware Trace expanded to %ik\n",
154 1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN);
155#endif
147} 156}