ae3c9aff52
of <machine/pc/bios.h> specific to i386 and added a conditional define for BIOS_PADDRTOVADDR that depends on ISA_HOLE_START. The latter is undefined on alpha and ia64. Since the former is defined the same on both alpha and ia64, assume the ISA_HOLE_START dependent definition is specific to amd64 and use the identity-mapping in all other cases. This of course is getting uglier every day...