ichsmb(4), tco(4): Add support for TCO on newer Intel chipsets.

TCO (`Total Cost of Ownership', Intel's bizarre name for a watchdog
timer) used to hang off the Intel I/O platform controller hub's (ICH)
low-pin-count interface bridge (LPC IB), or ichlpcib(4). On newer
devices, it hangs off the ICH SMBus instead.

Tested on INTEL 100SERIES_SMB (works) and INTEL 100SERIES_LP_SMB
(doesn't work, still not sure why).

XXX kernel revbump: This breaks the module ABI -- tco(4) modules
older than the change to make ta_has_rcba into ta_version will
incorrectly attach at buses they do not understand. (However, the
tco(4) driver is statically built into GENERIC, so maybe it's safe
for pullup since the module wouldn't have worked anyway.)

branches: 1.26.16;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.25.4;
vmx(4) should be MI. moved to sys/dev/pci from sys/arch/x86/pci

move the imc code into x86/pci/files.pci so that pci is defined in time.

provide an intermediate "bus" for the module and to be the same structure
like amdtemp

Add amdzentemp from FreeBSD via Ian Clark

Add support for I2C designware controllers (as found in Intel PCH devices),
with a pci front-end.
The pci front-end is tied to ACPI and Intel-specific, so it's in arch/x86/pci
and not dev/pci.
Core driver from OpenBSD, PCI front-end by me.

branches: 1.20.10;
Separate the watchdog code from the pcib code, and make the watchdog
a loadable module.

branches: 1.19.2;
add an agp dependency so that the agp drivers get loaded.

Install agp_* drivers where pchb(4) is installed except INSTALL_FLOPPY.

XXX
Config around agp(4) is done in quite wrong direction.
"pchb <- (agpbus) <- agp <- agp_*"
should be:
"pchb <- (pcibus) <- agp_* <- (agpbus) <- agp"

Fix another indirect circular dependency (agp_* -> (agpbus) -> pchb -> abp_*).
Fixes "no agp*" build. Reported & build-tested by Kurt Schreiner.

Add VMware VMXNET3 ethernet driver from OpenBSD, vmx(4).

branches: 1.15.10;
Intel Atom E600 PCI-LPC bridge, adds a watchdog + HPET support. Tested
on a Soekris net6501. (jmcneill)

branches: 1.14.2;
Replace amdtempbus with amdnb_miscbus.
This allows us to have independent drivers on the same device (northbridge f3)
each coming with a certain functionality/feature.
This way we do not need to mess with amdtemp(4) to utilize other features.

branches: 1.13.2; 1.13.6;
Attach amdtemp(4) at pchb(4) instead of in place of pchb(4).

Should fix PR#45268.

Factor out hpet(4) from ichlpcib(4).

branches: 1.11.2;
Add a driver for RDC's vortex86/PMX-1000 SoC PCI/ISA bridge, with support
for the integrated watchdog timer.

branches: 1.10.2;
Almost entirely rework Intel Firmware Hub random number generator support.

This introduces fwhrng(4) which attaches via ichlpcib(4), replacing
the rnd(4) support in pchb(4).

gcscpcib depends on functions from x86/pci/pcib.c

branches: 1.8.2; 1.8.4;
gpio(4) support for Intel ICH southbridges.

Tested on Intel SS4200-E (ICH7), and Acorp 6A815EPD (ICH2) motherboards,
on amd64 and i386 ports respectively.

It should be noted that the majority of boards with ICH chips do not
expose the GPIO pins for off-board use. For instance, aside from the
three exposed-on-a-header pins on the 6A815EPD, another pin is also
used to control write protect on the FWH. The SS4200 exposes the GPIO
on a header that connects to the 10 LEDs on the front panel, as well
as a tact switch on the back panel.

branches: 1.7.8;
Move some MD declarations from x86/pci/files.pci to x86/conf/files.x86,
so that Xen can use the former.

Drop Xen's pcib.c in favor of the x86 code and thereby unbreak ichlpcib.

branches: 1.6.4;
Add support for PCI_BUS_FIXUP and PCI_ADDR_FIXUP on amd64.

branches: 1.5.2; 1.5.4;
amdtemp(4): Driver for AMD CPU Temperature Sensors. Adopted from OpenBSD's kate(4).
Changes beyond OpenBSD's driver:
- Improved support for AMD K8
- Added support for AMD Barcelona, AMD Phenom and AMD Griffin
Tested on various single and multi-socket machines.
Review and OK xtreame

branches: 1.4.10; 1.4.12;
Merge jmcneill-pm branch.

branches: 1.3.2; 1.3.6; 1.3.8; 1.3.10; 1.3.12;
Share pcib(4) and amdpcib(4) between i386 and amd64; one copy is enough.

- Share pchb(4) between i386 and amd64; one copy is enough for both.
- Move some of the x86 PCI devices into x86/pci/files.pci.
- Add more x86 stuff into x86/conf/files.x86.

ok joerg.

branches: 1.1.2; 1.1.6;
file files.pci was initially added on branch jmcneill-pm.