[U-Boot] [PATCH 0/4] Accurate boot time measurement

[Simon Glass]

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