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

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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>
This commit is contained in:
Robin Getz
2007-06-21 16:34:08 +08:00
committed by Bryan Wu
parent 29440a2b4c
commit 669b792c77
9 changed files with 97 additions and 43 deletions
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14
arch/blackfin/kernel/setup.c
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@@ -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,