Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

o Determine the number of LAWs in a way the is future proof. Only the
MPC8555(E) has 8 LAWs, so don't make that the default case. Current
processors have 12 LAWs so use that as the default instead.
o Determine the target ID of the PCI/PCI-X and PCI-E controllers in
a way that's more future proof. There's almost a perfect mapping
from HC register offset to target ID, so use that as the default.
Handle the MPC8548(E) specially, since it has a non-standard target
ID for the PCI-E controller. Don't worry about whether the processor
implements the target ID here, because we should not get called for
PCI/PCI-X or PCI-E host controllers that don't exist.

Restructure how reset and poweroff are handled on PowerPC systems, since
the existing code was very platform specific, and broken for SMP systems
trying to reboot from KDB.

- Add a new PLATFORM_RESET() method to the platform KOBJ interface, and
migrate existing reset functions into platform modules.
- Modify the OF_reboot() routine to submit the request by hand to avoid
the IPIs involved in the regular openfirmware() routine. This fixes
reboot from KDB on SMP machines.
- Move non-KDB reset and poweroff functions on the Powermac platform
into the relevant power control drivers (cuda, pmu, smu), instead of
using them through the Open Firmware backdoor.
- Rename platform_chrp to platform_powermac since it has become
increasingly Powermac specific. When we gain support for IBM systems,
we will grow a new platform_chrp.

Convert Freescale PowerPC platforms to FDT convention.

The following systems are affected:

- MPC8555CDS
- MPC8572DS

This overhaul covers the following major changes:

- All integrated peripherals drivers for Freescale MPC85XX SoC, which are
currently in the FreeBSD source tree are reworked and adjusted so they
derive config data out of the device tree blob (instead of hard coded /
tabelarized values).

- This includes: LBC, PCI / PCI-Express, I2C, DS1553, OpenPIC, TSEC, SEC,
QUICC, UART, CFI.

- Thanks to the common FDT infrastrucutre (fdtbus, simplebus) we retire
ocpbus(4) driver, which was based on hard-coded config data.

Note that world for these platforms has to be built WITH_FDT.

Reviewed by: imp
Sponsored by: The FreeBSD Foundation

Make MPC85xx LAW handling and reset routines aware of the MPC8548 variant.

Inspired by discussion with Alexey V Fedorov on freebsd-powerpc@.

Extend and improve MPC85XX Local Bus management.

- Make LBC resources management self-contained: introduce explicit LBC
resources definition (much like the OCP), provide dedicated rman for LB mem
space.

- Full configuration of an LB chip select device: program LAW and BR/OR, map
into KVA, handle all LB attributes (bus width, machine select, ecc,
write protect etc).

- Factor out LAW manipulation routines into shared code, adjust OCP area
accordingly.

- Other LBC fixes and clean-ups.

Obtained from: Semihalf

Improve MPC85XX helper routines.

- Move CCSR accessors to the shared MPC85XX area
- Simplify SVR version subfield handling
- Adjust OCP

Remove mfsvr():
o The function is defined unconditionally but depends on SPR_SVR,
which is defined conditionally.
o spr.h defines mfspr() and mtspr(), which is no worse to use.

Use RSTCR for resetting the MPC8572 (the old way does not apply).

Obtained from: Freescale, Semihalf

Introduce a dedicated file for MPC85xx-specific routines. Move cpu_reset()
there, as it's not relevant to Book-E specification, but is an implementation
detail, directly dependent on the given SoC version.