Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Start each of the license/copyright comments with /*-, minor shuffle of lines

Other part of the cbb isa/pci split. This likely is causing problems
wrt cbb module.

MFP4:
Merge some common code from cbb into exca.

Massive overhaul of exca to help with the isa efforts:
o chip_name arrays ifdef'd out.
o use the OLDCARD-like get/put functions so we can support differnt types
of mappings.
o Write the beggings of is this a valid exca device and introduce more
chipset support.

# this is partially a wip, but also needed because some other cahnges I've
# made require some of these changes.

Do not return(foo()) in void function.

Submitted by: marius@alchemy.franken.de
MFC after: 3 days

MFp4:
o Protect .h against multiple includes.
o eliminate the pointers to the read/write routines. The
bus_space_read routines can cope since we have the offset
field.
o Print a warning if the requested map address is > 16M and
your chipset doesn't support the extended ExCA registers.

First draft of common code between pccbb and pcic drivers for talking
to ExCA register sets. These registers exist in both ISA and PCI
devices in a couple different ways, and this will provide a common
base for future building. This code is a rehash of the pccbb 16-bit
code, which was a rehash of the pcic code, which was a rehash of the
netbsd i82365 code. More hashing to come.