Kontron RTM8940 - Manual (Page 26)

13 RTM8940
www.kontron.com
2.7.6 Boot Block Upgrade Procedure
Type the following to perform MMC firmware upgrade
ipmifwu -fb -P /dev/ttyS1 -M rtm -p
2.7.6.1 Hot-Swap Process
The RTM8940 has the ability to be hot-swapped in and out of the front board. The onboard MMC manages the
RTM's power-up and power-down transitions. The list below illustrates this process for power down request.
1 Ejector latch is opened. HOT_SWAP_PB# assertion. MMC firmware detects the assertion of this
signal.
2 MMC sends "Module Handle Open" event message to the front board. The corresponding M state of
the front board moves from M4-> M5.
3 The front board moves from M5 -> M6 if the SHMC grants the request. The front board IPMC sends
the FRU control requesting quiesced state to the RTM.
4 The firmware deasserts payload power and sends "Module Quiesced" event message to the front
board where it transitions from M6 to M1 state.
2.7.6.2 Hot-Swap LED
The RTM8940 and RTMDISK supports a blue Hot Swap LED mounted on the front panel. This LED indicates
when it is safe to remove the RTM from the front board. The on-board MMC drives this LED to indicate the hot-
swap state. The following states are possible:
Table 2-6:Hot-Swap LED Description
When the RTM latch is disengaged from the faceplate, the hot swap switch embedded in the PCB will assert a
"HOT_SWAP_PB#" signal to the MMC, and the MMC will send “Module Handle Open” event message to the
front board which moves from the M4 state to the M5 state. Once in the M5 state, the front board will ask the
SHMC (or Shelf Manager) for permission to move the RTM to the M6 state. Then the IPMC of the front board,
through IPMB-L, will set the RTM Hot Swap LED to indicate this state with a short blink. Once permission is
received from the SHMC or higher-level software, the front board will move to the M6 state.
Note:
During boot block firmware upgrade the MMC is held in reset
Note:
Depending on your BIOS configuration, a hot-swap process might turn off the front board. Please
refer to the BIOS section
“Managed FRU Deactivation Policies” of the AT8940.
LED state Description
OFF M4 state; normal state when board is in operation.
ON M1 state; ready for hot swap.
Short blink M5 state; deactivation request
Long blink M2 state; activation request.