diff options
| author | Simon Glass <sjg@chromium.org> | 2011-04-07 10:14:41 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2011-08-24 09:56:21 -0700 |
| commit | 9530dc99ee3539909935e8a60a2bb756499c8318 (patch) | |
| tree | 9e67946a7e123dfa8a65c97629a726dcbd80e591 /include/common.h | |
| parent | 29897caccd59d51e110475edbaa483175f1f363f (diff) | |
Add microsecond boot time measurement
This defines the basics of a new boot time measurement feature. This allows
logging of very accurate time measurements as the boot proceeds, by using
an available microsecond counter.
To enable the feature, define CONFIG_BOOTSTAGE in your board config file.
Also available is CONFIG_BOOTSTAGE_REPORT which will cause a report to be
printed just before handing off to the OS.
BUG=chromium-os:13875
TEST=build and boot, check that progress is reported before running Linux:
Timer summary in microseconds:
Mark Elapsed Stage
0 0 awake
2,181,078 2,181,078 usb_start
11,861,817 9,680,739 bootp_start
11,884,610 22,793 bootp_stop
11,884,689 79 tftp start
15,271,536 3,386,847 tftp done
15,271,568 32 bootm_start
15,406,551 134,983 start_kernel
Change-Id: I71b89c8402dc5dec75e68333bd24a6bab7500a1b
Reviewed-on: http://gerrit.chromium.org/gerrit/197
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/common.h')
| -rw-r--r-- | include/common.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/common.h b/include/common.h index 2c8513ae18d..43b38928717 100644 --- a/include/common.h +++ b/include/common.h @@ -177,6 +177,14 @@ typedef void (interrupt_handler_t)(void *); #endif /* CONFIG_SERIAL_MULTI */ /* + * Return the time since boot in microseconds, This is needed for bootstage + * and should be defined in CPU- or board-specific code. + */ +unsigned long timer_get_us(void); + +#include <bootstage.h> + +/* * General Purpose Utilities */ #define min(X, Y) \ |