Talk:OpenPOWER Firmware

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Locations of SEEPROM and BMC SPI Flash

I can find this reference on IBM's site, https://developer.ibm.com/technologies/linux/articles/protect-system-firmware-openpower

The SBE has several stages, with the first part stored in processor one-time programmable read-only memory (OTPROM) and another part stored in the SEEPROM module located on the POWER processor module.

which suggests that SEEPROM is actually a tiny chip outside the POWER9?/POWER8? die, but I am not positive.

Also, this wiki page mentions "BMC SPI Flash", but I am unsure if this is a separate physical flash chip from PNOR?

AbstractConcept (talk) 11:23, 30 June 2021 (CDT)

It is practically guaranteed that the CPU SEEPROM is a separate die to the main POWER9 die, probably attached via I2C. Consider this photo of a POWER8 module without the heatspreader, probably some of those additional chips are SEEPROMs.

The BMC SPI flash is separate to the POWER firmware SPI flash; they are both in separate sockets on the mainboard. --HLandau (talk) 16:13, 20 July 2021 (CDT)

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