Baseboard Sku And Revision Id - QUANTA W Mainboard Series S210-MBT2W Technical Manual

A S B SKU R ID
BOUT THE ERVER ASEBOARD AND EVISION

[1.3.196] Baseboard SKU and Revision ID

[1.3.197] On the Romley Product design a copy of the base-
board SKU and revision ID's is stored in BIOS and FW flash
devices without any HW strapping requirements. Thurley was
the first platform to implement board SKU and revision ID in the
BIOS and firmware SPI flash devices. Historically, SKU and
revision ID's were strapped by HW and read by BIOS via
GPIO's.
[1.3.198] Product BIOS uses the Platform Data Region of the
SPI flash to store the 3-bit SKU and 3-bit revision ID's. These
IDs reside in the PIT (Platform Interface Table), along with
UUID, and is only programmable when in manufacturing mode.
Firmware uses a location in the Boot Block of the SPI flash to
store the 3-bit SKU and 2-bit revision ID's. Since SKU and revi-
sion ID's are programmed in a secure region in the BIOS flash,
BIOS is required to update a byte in an BMC Mailbox register
during each boot to ensure that Firmware has the most current
copy of the ID's in case the Firmware Boot Block is corrupted,
or the Firmware Boot Block is being updated.
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