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Diffstat (limited to 'common/Kconfig.boot')
| -rw-r--r-- | common/Kconfig.boot | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/common/Kconfig.boot b/common/Kconfig.boot index 4c99239dfb..bb069e2c86 100644 --- a/common/Kconfig.boot +++ b/common/Kconfig.boot @@ -691,4 +691,121 @@ config SPI_BOOT endmenu +menu "Autoboot options" + +config AUTOBOOT + bool "Autoboot" + default y + help + This enables the autoboot. See doc/README.autoboot for detail. + +config AUTOBOOT_KEYED + bool "Stop autobooting via specific input key / string" + default n + help + This option enables stopping (aborting) of the automatic + boot feature only by issuing a specific input key or + string. If not enabled, any input key will abort the + U-Boot automatic booting process and bring the device + to the U-Boot prompt for user input. + +config AUTOBOOT_PROMPT + string "Autoboot stop prompt" + depends on AUTOBOOT_KEYED + default "Autoboot in %d seconds\\n" + help + This string is displayed before the boot delay selected by + CONFIG_BOOTDELAY starts. If it is not defined there is no + output indicating that autoboot is in progress. + + Note that this define is used as the (only) argument to a + printf() call, so it may contain '%' format specifications, + provided that it also includes, sepearated by commas exactly + like in a printf statement, the required arguments. It is + the responsibility of the user to select only such arguments + that are valid in the given context. + +config AUTOBOOT_ENCRYPTION + bool "Enable encryption in autoboot stopping" + depends on AUTOBOOT_KEYED + help + This option allows a string to be entered into U-Boot to stop the + autoboot. The string itself is hashed and compared against the hash + in the environment variable 'bootstopkeysha256'. If it matches then + boot stops and a command-line prompt is presented. + + This provides a way to ship a secure production device which can also + be accessed at the U-Boot command line. + +config AUTOBOOT_DELAY_STR + string "Delay autobooting via specific input key / string" + depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION + help + This option delays the automatic boot feature by issuing + a specific input key or string. If CONFIG_AUTOBOOT_DELAY_STR + or the environment variable "bootdelaykey" is specified + and this string is received from console input before + autoboot starts booting, U-Boot gives a command prompt. The + U-Boot prompt will time out if CONFIG_BOOT_RETRY_TIME is + used, otherwise it never times out. + +config AUTOBOOT_STOP_STR + string "Stop autobooting via specific input key / string" + depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION + help + This option enables stopping (aborting) of the automatic + boot feature only by issuing a specific input key or + string. If CONFIG_AUTOBOOT_STOP_STR or the environment + variable "bootstopkey" is specified and this string is + received from console input before autoboot starts booting, + U-Boot gives a command prompt. The U-Boot prompt never + times out, even if CONFIG_BOOT_RETRY_TIME is used. + +config AUTOBOOT_KEYED_CTRLC + bool "Enable Ctrl-C autoboot interruption" + depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION + default n + help + This option allows for the boot sequence to be interrupted + by ctrl-c, in addition to the "bootdelaykey" and "bootstopkey". + Setting this variable provides an escape sequence from the + limited "password" strings. + +config AUTOBOOT_STOP_STR_SHA256 + string "Stop autobooting via SHA256 encrypted password" + depends on AUTOBOOT_KEYED && AUTOBOOT_ENCRYPTION + help + This option adds the feature to only stop the autobooting, + and therefore boot into the U-Boot prompt, when the input + string / password matches a values that is encypted via + a SHA256 hash and saved in the environment. + +config AUTOBOOT_USE_MENUKEY + bool "Allow a specify key to run a menu from the environment" + depends on !AUTOBOOT_KEYED + help + If a specific key is pressed to stop autoboot, then the commands in + the environment variable 'menucmd' are executed before boot starts. + +config AUTOBOOT_MENUKEY + int "ASCII value of boot key to show a menu" + default 0 + depends on AUTOBOOT_USE_MENUKEY + help + If this key is pressed to stop autoboot, then the commands in the + environment variable 'menucmd' will be executed before boot starts. + For example, 33 means "!" in ASCII, so pressing ! at boot would take + this action. + +config AUTOBOOT_MENU_SHOW + bool "Show a menu on boot" + depends on CMD_BOOTMENU + help + This enables the boot menu, controlled by environment variables + defined by the board. The menu starts after running the 'preboot' + environmnent variable (if enabled) and before handling the boot delay. + See README.bootmenu for more details. + +endmenu + endmenu # Booting |