100 lines
3.9 KiB
Plaintext
100 lines
3.9 KiB
Plaintext
/*
|
|
* (C) Copyright 2011-2012 Pali Rohár <pali.rohar@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
ANSI terminal bootmenu command
|
|
|
|
The "bootmenu" command uses U-Boot menu interfaces and provides
|
|
a simple mechanism for creating menus with different boot items.
|
|
The cursor keys "Up" and "Down" are used for navigation through
|
|
the items. Current active menu item is highlighted and can be
|
|
selected using the "Enter" key. The selection of the highlighted
|
|
menu entry invokes an U-Boot command (or a list of commands)
|
|
associated with this menu entry.
|
|
|
|
The "bootmenu" command interprets ANSI escape sequencies, so
|
|
an ANSI terminal is required for proper menu rendering and item
|
|
selection.
|
|
|
|
The assembling of the menu is done via a set of environment variables
|
|
"bootmenu_<num>" and "bootmenu_delay", i.e.:
|
|
|
|
bootmenu_delay=<delay>
|
|
bootmenu_<num>="<title>=<commands>"
|
|
|
|
<delay> is the autoboot delay in seconds, after which the first
|
|
menu entry will be selected automatically
|
|
|
|
<num> is the boot menu entry number, starting from zero
|
|
|
|
<title> is the text of the menu entry shown on the console
|
|
or on the boot screen
|
|
|
|
<commands> are commands which will be executed when a menu
|
|
entry is selected
|
|
|
|
(title and commands are separated by first appearance of '='
|
|
character in the environment variable)
|
|
|
|
First (optional) argument of the "bootmenu" command is a delay specifier
|
|
and it overrides the delay value defined by "bootmenu_delay" environment
|
|
variable. If the environment variable "bootmenu_delay" is not set or if
|
|
the argument of the "bootmenu" command is not specified, the default delay
|
|
will be CONFIG_BOOTDELAY. If delay is 0, no menu entries will be shown on
|
|
the console (or on the screen) and the command of the first menu entry will
|
|
be called immediately. If delay is less then 0, bootmenu will be shown and
|
|
autoboot will be disabled.
|
|
|
|
Bootmenu always adds menu entry "U-Boot console" at the end of all menu
|
|
entries specified by environment variables. When selecting this entry
|
|
the bootmenu terminates and the usual U-Boot command prompt is presented
|
|
to the user.
|
|
|
|
Example environment:
|
|
|
|
setenv bootmenu_0 Boot 1. kernel=bootm 0x82000000 # Set first menu entry
|
|
setenv bootmenu_1 Boot 2. kernel=bootm 0x83000000 # Set second menu entry
|
|
setenv bootmenu_2 Reset board=reset # Set third menu entry
|
|
setenv bootmenu_3 U-Boot boot order=boot # Set fourth menu entry
|
|
bootmenu 20 # Run bootmenu with autoboot delay 20s
|
|
|
|
|
|
The above example will be rendered as below
|
|
(without decorating rectangle):
|
|
|
|
┌──────────────────────────────────────────┐
|
|
│ │
|
|
│ *** U-Boot Boot Menu *** │
|
|
│ │
|
|
│ Boot 1. kernel │
|
|
│ Boot 2. kernel │
|
|
│ Reset board │
|
|
│ U-Boot boot order │
|
|
│ U-Boot console │
|
|
│ │
|
|
│ Hit any key to stop autoboot: 20 │
|
|
│ Press UP/DOWN to move, ENTER to select │
|
|
│ │
|
|
└──────────────────────────────────────────┘
|
|
|
|
Selected menu entry will be highlighted - it will have inverted
|
|
background and text colors.
|
|
|
|
To enable the "bootmenu" command add following definitions to the
|
|
board config file:
|
|
|
|
#define CONFIG_CMD_BOOTMENU
|
|
#define CONFIG_MENU
|
|
|
|
To run the bootmenu at startup add these additional definitions:
|
|
|
|
#define CONFIG_AUTOBOOT_KEYED
|
|
#define CONFIG_BOOTDELAY 30
|
|
#define CONFIG_MENU_SHOW
|
|
|
|
When you intend to use the bootmenu on color frame buffer console,
|
|
make sure to additionally define CONFIG_CFB_CONSOLE_ANSI in the
|
|
board config file.
|