57
MIC-3399 User Manual
C
ha
pte
r 3
IP
M
I C
on
fig
ura
tio
n
3.5
BMC Watchdog
The BMC provides an IPMI 2.0-compliant BMC watchdog to monitor the OS during
runtime or to observe the BIOS boot progress.
3.5.1
BIOS Boot Watchdog
The IPMI-compliant BMC watchdog is used to monitor BIOS boot progress and initi
-
ate a rollback when a BIOS is found to be corrupt.
It is set to a predefined value of 180 seconds and automatically starts when the pay-
load power for the x86 subsystem is turned on. The timeout action is set to “hardware
reset”, with the timer use indicating BIOS use.
If the watchdog timer times out with this configuration, it triggers a BIOS chip failover
followed by a system reset and restart of the watchdog timer. The mechanism runs in
an endless loop and logs ti failovers to the SEL through the integrity sensor.
BIOS does not modify the watchdog timer except for two situations:
It disables the watchdog right before jumping into the boot loader to avoid trig
-
gering after BIOS execution. It can alternatively reconfigure the watchdog to act
as a boot watchdog (i.e., change the timeout action).
It temporarily disables the watchdog once the setup menu is manually activated
for debugging purposes.
3.6
System Event Log (SEL)
A 64-KB SEL is implemented in the BMC. It stores all events that are either gener
-
ated by the BMC or that are passed to it from the system interface. The events are
physically stored in the externally attached SPI flash.
All received events are passed to the default event receiver (which is typically the
CMM in PICMG2.9 environments if one is present), regardless of whether it is stored
in the SEL. This means that local events will show up in the local BMC’s SEL as well
as in the CMMs shelf-wide SEL, unless there is no filter enabled on the CMM side.
The 64 KB size is sufficient to hold exactly 4096 entries of 16 bytes each.
Summary of Contents for MIC-3399
Page 8: ...MIC 3399 User Manual viii...
Page 29: ...Chapter 2 2 AMI BIOS Setup This chapter describes how to configure the AMI BIOS...
Page 47: ...35 MIC 3399 User Manual Chapter 2 AMI BIOS Setup 2 3 3 8 Southbridge Figure 2 19 Southbridge...
Page 63: ...Chapter 3 3 IPMI Configuration This chapter describes IPMI con figuration for MIC 3399...
Page 85: ...Appendix A A Pin Assignments This appendix provides the pin assignments...
Page 94: ...MIC 3399 User Manual 82...
Page 97: ...Appendix C C FPGA Specifications This appendix describes FPGA configuration...
Page 99: ...87 MIC 3399 User Manual Appendix C FPGA Specifications...
