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.
Example output is:
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
Simon Glass (4):
Add microsecond boot time measurement
Add bootstage progress report
Add bootstage calls in places appropriate for network booting
Add option to print boot stage report before starting kernel
README | 17 +++++++++
arch/arm/lib/board.c | 2 +
arch/arm/lib/bootm.c | 4 ++
common/Makefile | 1 +
common/bootstage.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++
common/cmd_bootm.c | 2 +
common/cmd_net.c | 7 +++-
common/cmd_usb.c | 1 +
include/bootstage.h | 74 ++++++++++++++++++++++++++++++++++++++
include/common.h | 8 ++++
net/bootp.c | 3 ++
net/net.c | 1 +
12 files changed, 216 insertions(+), 1 deletions(-)
create mode 100644 common/bootstage.c
create mode 100644 include/bootstage.h
--
1.7.3.1
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