Module Name:	src
Committed By:	cgd
Date:		Fri Apr  2 03:19:09 UTC 1999

Modified Files:
	src/sys/arch/alpha/stand/bootxx: bootxx.c
	src/sys/arch/alpha/stand/common: boot.c common.h
	src/sys/arch/alpha/stand/netboot: if_prom.c
Added Files:
	src/sys/arch/alpha/stand/common: booted_dev.c
Log Message:
abstract the prom device open/close into a separate module, which
provides the correct functions for primary, secondary, and unified
boot blocks.  actually behave correctly (e.g. expect correct arguments,
perform correct operations) depending on which you are.  also
some minor cleanup.