Blackfin arch: allow people to select the feature that is unavailable to the kernel

 - allow people to select the feature that is unavailable to the kernel: NMI, JTAG, or CYCLES.
 - change default NMI handler to simply dump hardware trace buffer.
 - remove default NMI handler completely as calling into kernel code is not safe
   move example handler to wiki so people dont haphazardly copy and paste this stuff thinking its safe

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/arch/blackfin/mach-common/ints-priority-dc.c b/arch/blackfin/mach-common/ints-priority-dc.c
index 684d306ab6bb..2db3546fc874 100644
--- a/arch/blackfin/mach-common/ints-priority-dc.c
+++ b/arch/blackfin/mach-common/ints-priority-dc.c
@@ -362,7 +362,11 @@ void __init init_exception_vectors(void)
 {
         SSYNC();
 
-        bfin_write_EVT2(evt_evt2);
+        /* cannot program in software:
+         * evt0 - emulation (jtag)
+         * evt1 - reset
+         */
+        bfin_write_EVT2(evt_nmi);
         bfin_write_EVT3(trap);
         bfin_write_EVT5(evt_ivhw);
         bfin_write_EVT6(evt_timer);