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System Management: Message Listeners
10009109-01 ATCA-9305 User’s Manual
7-43
Management Controller:
The controller provides a signals to reset the payload.
Payload: This provides signals to the controller indicating when the payload has reset for any reason,
that the payload is powered, and that the payload has finished its monitor booting
sequence. By default, a powered payload enables the watchdog and disables when the pay-
load is not powered.
I
2
C Port Expander: The I
2
C port expander provides signals to the payload to define the boot device selection
(boot select [1 and 2]) and to clear the payload reset indication. The I
2
C port expander com-
municates with the controller via a private I
2
C.
Payload Reset: This signal is used by the management controller to reset the payload.
Monitor Booted: This signal indicates to the management controller that a valid monitor image has finished
booting and the watchdog can be disabled.
Power Good: This signal indicates to the management controller that the payload is powered. When pay-
load power is applied, the BMC watchdog will start.
Force Boot Socket: If a shunt is present on J9 [1:2], the controller sets the boot location to socket flash with this
signal.
Payload Reset Indication:
When reset, this signal is held high by the payload until it is cleared by the IPMC using the
payload reset indication clear signal.
Boot Select [ ]: These signals select the boot device.
Payload Reset Indication Clear:
This signal clears the payload reset indication.
MESSAGE LISTENERS
Payload port dynamic control can be implemented via message listeners. The payload can
add itself as a message listener to any message destined for the IPMC target either over
IPMB-0 or the payload serial interface. When the IPMC receives a subscribed message, the
IPMC firmware copies the message into the payload’s LUN-10 Receive Message Queue and
notifies the payload via an unprintable character (ASCII 07, BELL). The payload receives the
message as described in “Message Bridging.” The message listener list is only eight entries
long. The payload can add/remove/get list at any time.
Note: The message listener list is not persistent across IPMC reboots.