| 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 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 |
| |
| menu "Boot media" |
| |
| config NOR_BOOT |
| bool "Support for booting from NOR flash" |
| depends on NOR |
| help |
| Enabling this will make a U-Boot binary that is capable of being |
| booted via NOR. In this case we will enable certain pinmux early |
| as the ROM only partially sets up pinmux. We also default to using |
| NOR for environment. |
| |
| config NAND_BOOT |
| bool "Support for booting from NAND flash" |
| default n |
| help |
| Enabling this will make a U-Boot binary that is capable of being |
| booted via NAND flash. This is not a must, some SoCs need this, |
| somes not. |
| |
| config ONENAND_BOOT |
| bool "Support for booting from ONENAND" |
| default n |
| help |
| Enabling this will make a U-Boot binary that is capable of being |
| booted via ONENAND. This is not a must, some SoCs need this, |
| somes not. |
| |
| config QSPI_BOOT |
| bool "Support for booting from QSPI flash" |
| default n |
| help |
| Enabling this will make a U-Boot binary that is capable of being |
| booted via QSPI flash. This is not a must, some SoCs need this, |
| somes not. |
| |
| config SATA_BOOT |
| bool "Support for booting from SATA" |
| default n |
| help |
| Enabling this will make a U-Boot binary that is capable of being |
| booted via SATA. This is not a must, some SoCs need this, |
| somes not. |
| |
| config SD_BOOT |
| bool "Support for booting from SD/EMMC" |
| default n |
| help |
| Enabling this will make a U-Boot binary that is capable of being |
| booted via SD/EMMC. This is not a must, some SoCs need this, |
| somes not. |
| |
| config SPI_BOOT |
| bool "Support for booting from SPI flash" |
| default n |
| help |
| Enabling this will make a U-Boot binary that is capable of being |
| booted via SPI flash. This is not a must, some SoCs need this, |
| somes not. |
| |
| endmenu |
| |
| config BOOTDELAY |
| int "delay in seconds before automatically booting" |
| default 2 |
| depends on AUTOBOOT |
| help |
| Delay before automatically running bootcmd; |
| set to 0 to autoboot with no delay, but you can stop it by key input. |
| set to -1 to disable autoboot. |
| set to -2 to autoboot with no delay and not check for abort |
| |
| See doc/README.autoboot for details. |
| |
| config CONSOLE_RECORD |
| bool "Console recording" |
| help |
| This provides a way to record console output (and provide console |
| input) through cirular buffers. This is mostly useful for testing. |
| Console output is recorded even when the console is silent. |
| To enable console recording, call console_record_reset_enable() |
| from your code. |
| |
| config CONSOLE_RECORD_OUT_SIZE |
| hex "Output buffer size" |
| depends on CONSOLE_RECORD |
| default 0x400 if CONSOLE_RECORD |
| help |
| Set the size of the console output buffer. When this fills up, no |
| more data will be recorded until some is removed. The buffer is |
| allocated immediately after the malloc() region is ready. |
| |
| config CONSOLE_RECORD_IN_SIZE |
| hex "Input buffer size" |
| depends on CONSOLE_RECORD |
| default 0x100 if CONSOLE_RECORD |
| help |
| Set the size of the console input buffer. When this contains data, |
| tstc() and getc() will use this in preference to real device input. |
| The buffer is allocated immediately after the malloc() region is |
| ready. |
| |
| config SYS_NO_FLASH |
| bool "Disable support for parallel NOR flash" |
| default n |
| help |
| This option is used to disable support for parallel NOR flash. |