3 examples of startup scripts, 1 execute shell script on other harddrive, 2 enable watchdog – Kontron AM4024e User Manual
Page 72: Examples of startup scripts, Execute shell script on other harddrive, Enable watchdog, Handling the startup script in the spi boot flash
D R A F T — F O R I N
T E R N A L U S E O N L Y
72
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User Guide
AM4024(E)
9.4.3 Examples of Startup Scripts
9.4.3.1 Execute Shell Script on Other Harddrive
This example (startup.nsh) executes the shell script named bootme.nsh located in the root of
the first detected disc drive (fs0).
9.4.3.2 Enable Watchdog
The uEFI Shell provides an environment variable used to control the execution flow. The following sam-
ple start-up script shows the uEFI Shell environment variable wdt_enable used to control the
Watchdog.
To create a uEFI Shell environment variable, use the
set uEFI Shell command as shown below:
9.4.3.3 Handling the Startup Script in the SPI Boot Flash
In case there is no mass storage device attached, the startup script can be generated in a RAM disk and
stored in the SPI boot flash using the following instructions:
1.
Press <ESC> during power-up to log into the uEFI Shell.
2.
Create a RAM disk and set the proper working directory as shown below:
3.
Enter the sample start-up script mentioned above in this section using the
edit uEFI Shell
command.
fs0:
bootme.nsh
echo -off
echo “Executing sample startup.nsh...”
if %wdt_enable% == “on” then
kwatchdog -t 15
echo “Watchdog enabled”
endif
Shell> set wdt_enable on
Shell> set
wdt_enable : on
Shell> reset
Shell> kramdisk -s 3 -c -m myramdisk
Shell> myramdisk:
myramdisk:\> edit boot.nsh