Moved from a two level 512/1024 entry setup mapping 32 (9/10/13) bits
respectively to a three level 1024/1024/1024 entry setup mapping 43
(10/10/10/13) bits. In 32-bit mode we waste about 1/12 pages mapping the high
11 bits. We also only manage 43 of the possible 44 bits of virtual address
space, wasting half of it. Oh well, maybe we'll do better next revision.
Added genassym.cf
Removed lderr which should never have gotten in
Removed lots of dead code from locore.s
Added some softint stuff to intr.c
Added support for halt -p
esp and le both use bus_dmamap_*() functions now
instead of kdvma_mapin()
groundwork for PCI (but we still have no drivers for
any sun4u PCI devices)
