Controlling The Execution Of The Post; Table 5-6 Post Routines; Table 5-7 Environment Variable Post_Control - SMART Embedded Computing ATCA-F140 Series Installation And Use Manual

Table 5-6
Device
MDIO/PHY
TSEC network port
Boot flash
RTM
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.
Table 5-7
Value
off
always
hard
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.
ATCA-F140 Series Installation and Use (6806800M67S)
POST Routines (continued)
Description
Attempts to read model and device ID from PHY address 0..3
The PHY for each TSEC port is configured to loop back mode, 100 and
1000 MBPS, and 10000 loop back packets are sent and verified.
Flash devices are sent into CFI query mode and the query string is
verified.
Check connectivity of 10G repeater devices on RTM
Environment Variable post_control
Description
Disables POST altogether
POST is executed after all types of blade resets
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
through the U-Boot command reset or the Linux command reboot.
U-Boot
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