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, 11 insertions, 3 deletions

diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 07c1cfdc958e..a86bf6545781 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -194,6 +194,17 @@ void __init setup_arch(char **cmdline_p)
         /* this give a chance to get printk() working before crash. */
 #endif
 
+        printk(KERN_INFO "Hardware Trace ");
+        if (bfin_read_TBUFCTL() & 0x1 )
+                printk("Active ");
+        else
+                printk("Off ");
+        if (bfin_read_TBUFCTL() & 0x2)
+                printk("and Enabled\n");
+        else
+        printk("and Disabled\n");
+
+
 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
         /* we need to initialize the Flashrom device here since we might
          * do things with flash early on in the boot
@@ -397,9 +408,6 @@ void __init setup_arch(char **cmdline_p)
         _bfin_swrst = bfin_read_SWRST();
 #endif
 
-        printk(KERN_INFO "Hardware Trace Enabled\n");
-        bfin_write_TBUFCTL(0x03);
-
         /* Copy atomic sequences to their fixed location, and sanity check that
            these locations are the ones that we advertise to userspace.  */
         memcpy((void *)FIXED_CODE_START, &fixed_code_start,