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https://github.com/brain-hackers/u-boot-brain
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![Masahiro Yamada](/assets/img/avatar_default.png)
Since commit bb597c0eeb
("common: bootdelay: move CONFIG_BOOTDELAY
into a Kconfig option"), CONFIG_BOOTDELAY is defined for all boards.
Prior to that commit, it was allowed to unset CONFIG_BOOTDELAY to
not compile common/autoboot.c, as described in common/Makefile:
# This option is not just y/n - it can have a numeric value
ifdef CONFIG_BOOTDELAY
obj-y += autoboot.o
endif
It was a bit odd to enable/disable code with an integer type option,
but it was how this option worked before that commit, and several
boards actually unset it to opt out of the autoboot feature.
This commit adds a new bool option, CONFIG_AUTOBOOT, and makes
CONFIG_BOOTDELAY depend on it.
I chose "default y" for this option because most boards use the
autoboot. I added "# CONFIG_AUTOBOOT is not set" for the boards that
had not set CONFIG_BOOTDELAY prior to the bad commit.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
137 lines
4.5 KiB
Plaintext
137 lines
4.5 KiB
Plaintext
menu "Boot timing"
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config BOOTSTAGE
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bool "Boot timing and reporting"
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help
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Enable recording of boot time while booting. To use it, insert
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calls to bootstage_mark() with a suitable BOOTSTAGE_ID from
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bootstage.h. Only a single entry is recorded for each ID. You can
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give the entry a name with bootstage_mark_name(). You can also
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record elapsed time in a particular stage using bootstage_start()
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before starting and bootstage_accum() when finished. Bootstage will
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add up all the accumated time and report it.
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Normally, IDs are defined in bootstage.h but a small number of
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additional 'user' IDs can be used but passing BOOTSTAGE_ID_ALLOC
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as the ID.
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Calls to show_boot_progress() wil also result in log entries but
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these will not have names.
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config BOOTSTAGE_REPORT
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bool "Display a detailed boot timing report before booting the OS"
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depends on BOOTSTAGE
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help
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Enable output of a boot time report just before the OS is booted.
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This shows how long it took U-Boot to go through each stage of the
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boot process. The report looks something like this:
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Timer summary in microseconds:
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Mark Elapsed Stage
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0 0 reset
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3,575,678 3,575,678 board_init_f start
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3,575,695 17 arch_cpu_init A9
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3,575,777 82 arch_cpu_init done
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3,659,598 83,821 board_init_r start
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3,910,375 250,777 main_loop
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29,916,167 26,005,792 bootm_start
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30,361,327 445,160 start_kernel
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config BOOTSTAGE_USER_COUNT
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hex "Number of boot ID numbers available for user use"
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default 20
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help
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This is the number of available user bootstage records.
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Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...)
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a new ID will be allocated from this stash. If you exceed
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the limit, recording will stop.
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config BOOTSTAGE_FDT
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bool "Store boot timing information in the OS device tree"
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depends on BOOTSTAGE
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help
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Stash the bootstage information in the FDT. A root 'bootstage'
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node is created with each bootstage id as a child. Each child
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has a 'name' property and either 'mark' containing the
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mark time in microsecond, or 'accum' containing the
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accumulated time for that bootstage id in microseconds.
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For example:
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bootstage {
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154 {
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name = "board_init_f";
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mark = <3575678>;
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};
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170 {
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name = "lcd";
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accum = <33482>;
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};
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};
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Code in the Linux kernel can find this in /proc/devicetree.
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config BOOTSTAGE_STASH
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bool "Stash the boot timing information in memory before booting OS"
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depends on BOOTSTAGE
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help
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Some OSes do not support device tree. Bootstage can instead write
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the boot timing information in a binary format at a given address.
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This happens through a call to bootstage_stash(), typically in
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the CPU's cleanup_before_linux() function. You can use the
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'bootstage stash' and 'bootstage unstash' commands to do this on
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the command line.
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config BOOTSTAGE_STASH_ADDR
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hex "Address to stash boot timing information"
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default 0
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help
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Provide an address which will not be overwritten by the OS when it
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starts, so that it can read this information when ready.
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config BOOTSTAGE_STASH_SIZE
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hex "Size of boot timing stash region"
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default 4096
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help
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This should be large enough to hold the bootstage stash. A value of
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4096 (4KiB) is normally plenty.
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endmenu
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config BOOTDELAY
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int "delay in seconds before automatically booting"
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default 2
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depends on AUTOBOOT
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help
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Delay before automatically running bootcmd;
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set to -1 to disable autoboot.
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set to -2 to autoboot with no delay and not check for abort
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(even when CONFIG_ZERO_BOOTDELAY_CHECK is defined).
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config CONSOLE_RECORD
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bool "Console recording"
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help
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This provides a way to record console output (and provide console
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input) through cirular buffers. This is mostly useful for testing.
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Console output is recorded even when the console is silent.
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To enable console recording, call console_record_reset_enable()
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from your code.
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config CONSOLE_RECORD_OUT_SIZE
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hex "Output buffer size"
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depends on CONSOLE_RECORD
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default 0x400 if CONSOLE_RECORD
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help
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Set the size of the console output buffer. When this fills up, no
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more data will be recorded until some is removed. The buffer is
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allocated immediately after the malloc() region is ready.
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config CONSOLE_RECORD_IN_SIZE
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hex "Input buffer size"
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depends on CONSOLE_RECORD
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default 0x100 if CONSOLE_RECORD
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help
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Set the size of the console input buffer. When this contains data,
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tstc() and getc() will use this in preference to real device input.
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The buffer is allocated immediately after the malloc() region is
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ready.
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