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 accumulated time and report it. Normally, IDs are defined in bootstage.h but a small number of additional 'user' IDs can be used by passing BOOTSTAGE_ID_ALLOC as the ID. Calls to show_boot_progress() will 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 microseconds, 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, some 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, some 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, some 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, some 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, some 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, some 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. menu "Console" config CONSOLE_RECORD bool "Console recording" help This provides a way to record console output (and provide console input) through circular 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 IDENT_STRING string "Board specific string to be added to uboot version string" help This options adds the board specific name to u-boot version. config SILENT_CONSOLE bool "Support a silent console" help This option allows the console to be silenced, meaning that no output will appear on the console devices. This is controlled by setting the environment vaariable 'silent' to a non-empty value. Note this also silences the console when booting Linux. When the console is set up, the variable is checked, and the GD_FLG_SILENT flag is set. Changing the environment variable later will update the flag. config SILENT_U_BOOT_ONLY bool "Only silence the U-Boot console" depends on SILENT_CONSOLE help Normally when the U-Boot console is silenced, Linux's console is also silenced (assuming the board boots into Linux). This option allows the linux console to operate normally, even if U-Boot's is silenced. config SILENT_CONSOLE_UPDATE_ON_SET bool "Changes to the 'silent' environment variable update immediately" depends on SILENT_CONSOLE default y if SILENT_CONSOLE help When the 'silent' environment variable is changed, update the console silence flag immediately. This allows 'setenv' to be used to silence or un-silence the console. The effect is that any change to the variable will affect the GD_FLG_SILENT flag. config SILENT_CONSOLE_UPDATE_ON_RELOC bool "Allow flags to take effect on relocation" depends on SILENT_CONSOLE help In some cases the environment is not available until relocation (e.g. NAND). This option makes the value of the 'silent' environment variable take effect at relocation. config SPL_DISABLE_CONSOLE bool "Support a disabled console in SPL" default y if SILENT_CONSOLE help This option disables the console, meaning that no output will appear on the console devices. config PRE_CONSOLE_BUFFER bool "Buffer characters before the console is available" help Prior to the console being initialised (i.e. serial UART initialised etc) all console output is silently discarded. Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to buffer any console messages prior to the console being initialised to a buffer. The buffer is a circular buffer, so if it overflows, earlier output is discarded. Note that this is not currently supported in SPL. It would be useful to be able to share the pre-console buffer with SPL. config PRE_CON_BUF_SZ int "Sets the size of the pre-console buffer" depends on PRE_CONSOLE_BUFFER default 4096 help The size of the pre-console buffer affects how much console output can be held before it overflows and starts discarding earlier output. Normally there is very little output at this early stage, unless debugging is enabled, so allow enough for ~10 lines of text. This is a useful feature if you are using a video console and want to see the full boot output on the console. Without this option only the post-relocation output will be displayed. config PRE_CON_BUF_ADDR hex "Address of the pre-console buffer" depends on PRE_CONSOLE_BUFFER default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I help This sets the start address of the pre-console buffer. This must be in available memory and is accessed before relocation and possibly before DRAM is set up. Therefore choose an address carefully. We should consider removing this option and allocating the memory in board_init_f_init_reserve() instead. config CONSOLE_MUX bool "Enable console multiplexing" default y if DM_VIDEO || VIDEO || LCD help This allows multiple devices to be used for each console 'file'. For example, stdout can be set to go to serial and video. Similarly, stdin can be set to come from serial and keyboard. Input can be provided from either source. Console multiplexing adds a small amount of size to U-Boot. Changes to the environment variables stdout, stdin and stderr will take effect immediately. config SYS_CONSOLE_IS_IN_ENV bool "Select console devices from the environment" default y if CONSOLE_MUX help This allows multiple input/output devices to be set at boot time. For example, if stdout is set to "serial,video" then output will be sent to both the serial and video devices on boot. The environment variables can be updated after boot to change the input/output devices. config SYS_CONSOLE_OVERWRITE_ROUTINE bool "Allow board control over console overwriting" help If this is enabled, and the board-specific function overwrite_console() returns 1, the stdin, stderr and stdout are switched to the serial port, else the settings in the environment are used. If this is not enabled, the console will not be switched to serial. config SYS_CONSOLE_ENV_OVERWRITE bool "Update environment variables during console init" help The console environment variables (stdout, stdin, stderr) can be used to determine the correct console devices on start-up. This option writes the console devices to these variables on console start-up (after relocation). This causes the environment to be updated to match the console devices actually chosen. config SYS_CONSOLE_INFO_QUIET bool "Don't display the console devices on boot" help Normally U-Boot displays the current settings for stdout, stdin and stderr on boot when the post-relocation console is set up. Enable this option to supress this output. It can be obtained by calling stdio_print_current_devices() from board code. config SYS_STDIO_DEREGISTER bool "Allow deregistering stdio devices" default y if USB_KEYBOARD help Generally there is no need to deregister stdio devices since they are never deactivated. But if a stdio device is used which can be removed (for example a USB keyboard) then this option can be enabled to ensure this is handled correctly. endmenu config DEFAULT_FDT_FILE string "Default fdt file" help This option is used to set the default fdt file to boot OS. 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. config VERSION_VARIABLE bool "add U-Boot environment variable vers" default n help If this variable is defined, an environment variable named "ver" is created by U-Boot showing the U-Boot version as printed by the "version" command. Any change to this variable will be reverted at the next reset. config DISPLAY_CPUINFO bool "Display information about the CPU during start up" default y if ARM || BLACKFIN || NIOS2 || X86 || XTENSA help Display information about the CPU that U-Boot is running on when U-Boot starts up. The function print_cpuinfo() is called to do this. config DISPLAY_BOARDINFO bool "Display information about the board during start up" default y if ARM || M68K || MIPS || PPC || SPARC || XTENSA help Display information about the board that U-Boot is running on when U-Boot starts up. The board function checkboard() is called to do this. source "common/spl/Kconfig"