Blackfin arch: Clean up trace buffer handling, No major functional changes.

Turns on trace earlier, so crashes at kernel start should print out a
trace, making things easier to debug.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/blackfin/mach-bf537/head.S b/arch/blackfin/mach-bf537/head.S
index 7d902bbd860f..429c8a1019da 100644
--- a/arch/blackfin/mach-bf537/head.S
+++ b/arch/blackfin/mach-bf537/head.S
@@ -30,6 +30,8 @@
 #include <linux/linkage.h>
 #include <linux/init.h>
 #include <asm/blackfin.h>
+#include <asm/trace.h>
+
 #if CONFIG_BFIN_KERNEL_CLOCK
 #include <asm/mach/mem_init.h>
 #endif
@@ -93,6 +95,10 @@ ENTRY(__start)
         M2 = r0;
         M3 = r0;
 
+        trace_buffer_start(p0,r0);
+        P0 = R1;
+        R0 = R1;
+
         /* Turn off the icache */
         p0.l = (IMEM_CONTROL & 0xFFFF);
         p0.h = (IMEM_CONTROL >> 16);