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)
GC the unused `physadr' type, which was not able to hold a complete physical
address on 2 architectures anyhow. Also, move the definition of the `label_t'
type inside _KERNEL protection, since it is specific to the in-kernel
setjmp()/longjmp() implementations.
