High Availability Signal Support; Setting Openboot Prom Configuration Variables - Sun Microsystems Netra CP2000 Series Programming Manual

High Availability Signal Support

Using high availability (HA) signal support, you can write your application to
control which CompactPCI slots in an HA chassis are powered on. Before your
application can control these signals, you must first set two Netra CP2140 series
board OpenBoot™ PROM configuration variables.
Note – The following section applies only to CP2140 boards used as system
controllers.

Setting OpenBoot PROM Configuration Variables

You must set these two Netra CP2140 series board OpenBoot PROM configuration
variables before an application can gain control of the HA signals:
ha-signal-handler
■
poweron-vector
■
The ha-signal-handler variable indicates whether the system management
controller (SMC) module controls the HA signals or if an external application
controls these signals. By default, the variable's value is 0, which means that the
SMC module controls the HA signals. If you set the variable to 1, an external
application can control the HA signals.
If you are developing an application that must control the HA signals, set the
ha-signal-handler variable to 1 using the setsmcenv OpenBoot PROM
command:
ok setsmcenv ha-signal-handler 1
To confirm that the variable has been set correctly, use the printsmcenv command
at the ok prompt:
ok printsmcenv ha-signal-handler
1
Note – To display the setting for every configuration variable, type the
printsmcenv command at the ok prompt without a variable.
Chapter 5 Programming Netra CP2100 Series Board Controlled Devices 89