diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/Kconfig | 106 | ||||
| -rw-r--r-- | common/cmd_bootstage.c | 7 |
2 files changed, 107 insertions, 6 deletions
diff --git a/common/Kconfig b/common/Kconfig index 4cde4b0048..0a4652b314 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -341,4 +341,110 @@ config CMD_SETGETDCR endmenu +menu "Boot timing" + +config BOOTSTAGE + bool "Boot timing and reporting" + help + Enable recording of boot time while booting. To use it, insert + calls to bootstage_mark() with a suitable BOOTSTAGE_ID from + bootstage.h. Only a single entry is recorded for each ID. You can + give the entry a name with bootstage_mark_name(). You can also + record elapsed time in a particular stage using bootstage_start() + before starting and bootstage_accum() when finished. Bootstage will + add up all the accumated time and report it. + + Normally, IDs are defined in bootstage.h but a small number of + additional 'user' IDs can be used but passing BOOTSTAGE_ID_ALLOC + as the ID. + + Calls to show_boot_progress() wil also result in log entries but + these will not have names. + +config BOOTSTAGE_REPORT + bool "Display a detailed boot timing report before booting the OS" + depends on BOOTSTAGE + help + Enable output of a boot time report just before the OS is booted. + This shows how long it took U-Boot to go through each stage of the + boot process. The report looks something like this: + + Timer summary in microseconds: + Mark Elapsed Stage + 0 0 reset + 3,575,678 3,575,678 board_init_f start + 3,575,695 17 arch_cpu_init A9 + 3,575,777 82 arch_cpu_init done + 3,659,598 83,821 board_init_r start + 3,910,375 250,777 main_loop + 29,916,167 26,005,792 bootm_start + 30,361,327 445,160 start_kernel + +config BOOTSTAGE_USER_COUNT + hex "Number of boot ID numbers available for user use" + default 20 + help + This is the number of available user bootstage records. + Each time you call bootstage_mark(BOOTSTAGE_ID_ALLOC, ...) + a new ID will be allocated from this stash. If you exceed + the limit, recording will stop. + +config CMD_BOOTSTAGE + bool "Enable the 'bootstage' command" + depends on BOOTSTAGE + help + Add a 'bootstage' command which supports printing a report + and un/stashing of bootstage data. + +config BOOTSTAGE_FDT + bool "Store boot timing information in the OS device tree" + depends on BOOTSTAGE + help + Stash the bootstage information in the FDT. A root 'bootstage' + node is created with each bootstage id as a child. Each child + has a 'name' property and either 'mark' containing the + mark time in microsecond, or 'accum' containing the + accumulated time for that bootstage id in microseconds. + For example: + + bootstage { + 154 { + name = "board_init_f"; + mark = <3575678>; + }; + 170 { + name = "lcd"; + accum = <33482>; + }; + }; + + Code in the Linux kernel can find this in /proc/devicetree. + +config BOOTSTAGE_STASH + bool "Stash the boot timing information in memory before booting OS" + depends on BOOTSTAGE + help + Some OSes do not support device tree. Bootstage can instead write + the boot timing information in a binary format at a given address. + This happens through a call to bootstage_stash(), typically in + the CPU's cleanup_before_linux() function. You can use the + 'bootstage stash' and 'bootstage unstash' commands to do this on + the command line. + +config BOOTSTAGE_STASH_ADDR + hex "Address to stash boot timing information" + default 0 + help + Provide an address which will not be overwritten by the OS when it + starts, so that it can read this information when ready. + +config BOOTSTAGE_STASH_SIZE + hex "Size of boot timing stash region" + default 4096 + help + This should be large enough to hold the bootstage stash. A value of + 4096 (4KiB) is normally plenty. + +endmenu + endmenu diff --git a/common/cmd_bootstage.c b/common/cmd_bootstage.c index 106894aa51..788ab16436 100644 --- a/common/cmd_bootstage.c +++ b/common/cmd_bootstage.c @@ -6,11 +6,6 @@ #include <common.h> -#ifndef CONFIG_BOOTSTAGE_STASH -#define CONFIG_BOOTSTAGE_STASH -1UL -#define CONFIG_BOOTSTAGE_STASH_SIZE -1 -#endif - static int do_bootstage_report(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { @@ -24,7 +19,7 @@ static int get_base_size(int argc, char * const argv[], ulong *basep, { char *endp; - *basep = CONFIG_BOOTSTAGE_STASH; + *basep = CONFIG_BOOTSTAGE_STASH_ADDR; *sizep = CONFIG_BOOTSTAGE_STASH_SIZE; if (argc < 2) return 0; |