Marshall Dawson has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/37491 )
Change subject: x86: Implement a romstage-only version of RESET_VECTOR_IN_RAM ......................................................................
Patch Set 4:
@Kyösti, @Aaron, Given our change of heart on the hybrid romstage, this change and the next one (CB:33759) will go away as soon as I can get it reworked. This should simplify a few things and will also allow some of the earlier changes to be cleaner.
The new direction is to always run bootblock, <verstage>, romstage, ramstage just like all other x86 systems. And, when multiple eligible regions are available, the plan is to always execute an RO bootblock image. (The RO bootblock is the main driving reason behind a psp_biosimg.rom that sits outside of the typical amdfw.rom.)