Artesyn ATCA-F120 Installation and Use (August 2014) - Manual (Page 100)

U-Boot Firmware
ATCA-F120 Installation and Use (6806800D06J) 100
5.8.2 Controlling the Execution of the POST
The environment variable post_control allows to configure when POST is executed.
Possible values of post_control and their meaning are described in the following table.
You can start the POST execution manually by invoking the following command at the U-Boot
command line interface: .post_all()
As you can see from the syntax, this command invokes an underlying C function which starts
the POST execution. This command can be invoked at any time and it is independent of the
environment variable post_enable.
5.9 ATCA-F120 Specific U-Boot Commands
The following table lists ATCA-F120 specific U-boot commands.
Table 5-7 Environment Variable post_control
Value Description
never
Disables POST altogether.
always
POST is executed after all types of blade resets.
hard
POST is executed only after hard resets. A hard reset is a reset of the entire payload and
can be issued by the following reset sources:

Watchdog inside CPU
 Boot sequence failure
 Software
 Face plate reset key
A hard reset is NOT an CPU internal reset, such as a reset issued via the U-Boot command
reset
or the Linux command reboot.
Table 5-8 ATCA-F120 Specific U-Boot Commands
Command Description
bparams_set
Allows to configure IPMI system boot options
hreset
Issues a hard reset on the ATCA-F120. A hard reset resets the entire
payload.