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/bootstage.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/bootstage.h')
-rw-r--r-- | include/bootstage.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/include/bootstage.h b/include/bootstage.h new file mode 100644 index 00000000000..ade5a13999c --- /dev/null +++ b/include/bootstage.h @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2011, Google Inc. All rights reserved. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __BOOTSTAGE_H +#define __BOOTSTAGE_H + +/* + * These are the things that can be timestamped. There are some pre-defined + * by U-Boot, and some which are user defined. + */ +enum bootstage_id { + BOOTSTAGE_AWAKE, + BOOTSTAGE_START_UBOOT, + BOOTSTAGE_USB_START, + BOOTSTAGE_ETH_START, + BOOTSTAGE_BOOTP_START, + BOOTSTAGE_BOOTP_STOP, + BOOTSTAGE_KERNELREAD_START, + BOOTSTAGE_KERNELREAD_STOP, + BOOTSTAGE_BOOTM_START, + BOOTSTAGE_BOOTM_HANDOFF, + + /* a few spare for the user, from here */ + BOOTSTAGE_USER, + + /* + * Total number of entries - increase this at the cost of some BSS + * and ATAG space. + */ + BOOTSTAGE_COUNT = 10 +}; + +#ifdef CONFIG_BOOTSTAGE + +/* + * Mark a time stamp for the current boot stage. + */ +uint32_t bootstage_mark(enum bootstage_id id, const char *name); + +/* Print a report about boot time */ +void bootstage_report(void); + +#else + +static inline bootstage_mark(enum bootstage_id id, const char *name) +{} + +#endif + +#endif + |