So it looks like the WOF boost tables are posted here?
https://github.com/open-power/WOF-Tables
Lots of interesting info in this. Seems like the 4-core target frequency is 3200 and the ultraturbo frequency is 3800. Last column looks to be the "WOF frequency" according to the header.
Here is the header followed by a single line (of thousands) which seems to represent something about how it decides the target frequency: (I'm not sure how to fix the column formatting, so readers will have to deconvolve that...)
MOPT YIELD PACKAGE VERSION SOCKET_POWER RDP_CAPACITY CORE_COUNT PDV_SORT_POWER_TARGET_FREQ PDV_SORT_POWER_ULTRA_TURBO_FREQ NEST_FREQ VRATIO_START VRATIO_STEP FRATIO_START FRATIO_STEP CORE_CEFF CORE_CEFF_INDEX NEST_CEFF NEST_CEFF_INDEX ACTIVE_QUADS VRATIO VRATIO_INDEX FRATIO FRATIO_INDEX WOF_FREQ
OpenPOWER Raptor 95 Sforza v7.3.3 90 108 4 3200 3800 1867 0.0409 0.0417 1 0.1 0 0 0.25 0 6 0.0409 0 0.6 4 3800
Still cannot find how they get consumed by the boot process, though.