typical build will now include 880 bytes of PCI support code, compared to
2327 bytes in Etherboot 5.4.

(There is a slight cost of around 5 extra bytes per access to a
non-constant config space address; this should be an overall win.
Driver-specific accesses will usually be to constant addresses, for
which there is no additional cost.)

Generic PCI code now handles 64-bit BARs correctly when setting
"membase"; drivers should need to call pci_bar_start() only if they want
to use BARs other than the first memory or I/O BAR.

Split rarely-used PCI functions out into pciextra.c.

Core PCI code is now 662 bytes (down from 1308 bytes in Etherboot 5.4).
284 bytes of this saving comes from the pci/pciextra split.

Cosmetic changes to lots of drivers (e.g. vendor_id->vendor in order to
match the names used in Linux).

I want to get to the point where any header in include/ reflects a
standard user-level header (e.g. a POSIX header), while everything that's
specific to gPXE lives in include/gpxe/.  Headers that reflect a Linux
header (e.g. if_ether.h) should also be in include/gpxe/, with the same
name as the Linux header and, preferably, the same names used for the
definitions.

thinks they are.
Other bus drivers modified for consistency.

initial device, and will also allow for e.g. a device menu to be presented
to the user.

Change from using #if to #ifdef, since #if can't cope with string
constants.

Move ISA probe address logic from config.c into isa.c, create header file
config/isa.h.

since we probably shouldn't be doing this to arbitrary devices during a
PCI bus scan...

quickly.

Prevented find_pci_device() from being an endless loop.

specification of ISA_PROBE_ADDRS.

otherwise isapnp_max_csn is zero and we never call fill_isapnp_device.

Fix debug message.

udelay().

(just build debugging versions of the relevant bus objects).