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

Merge ACPICA 20110527.

Import ACPICA 20090521.

Add a new 'why' argument to kdb_enter(), and a set of constants to use
for that argument. This will allow DDB to detect the broad category of
reason why the debugger has been entered, which it can use for the
purposes of deciding which DDB script to run.

Assign approximate why values to all current consumers of the
kdb_enter() interface.

Catch up with ACPI-CA 20070320 import.

Only enter the debugger on a Fatal op if this is a debug build of the
acpi module. Also clean up print of args a little.

This was accidentally committed as 1.9.2.3 in the stable branch. Since it
is harmless, I will let the "insta-MFC" stand unless there is a problem.

Canonize the include of acpi.h.

Standardize __FBSDID identifiers.

MFC after: 2 days

Don't enter the debugger when executing an AML breakpoint instruction
unless ACPI_DEBUG is defined. Users don't typically care about errant
breakpoint instructions. The HP Pavilion 7915 has this in its PCI0
_INI method for rev 0x6040000 of the RSDT.

Update for the KDB framework:
o Call kdb_enter() instead of Debugger().

Unbreak the DDB build by replacing #includes that were deleted.

Pointed out by: Tai-hwa Liang, Xin LI
Pointed hat to: njl

Style cleanups to reduce diffs to locking tree.

Support functions for the new ACPI import.
* AcpiOsDerivePciId(): finds a bus number, given the slot/func and the
acpi parse tree.
* AcpiOsPredefinedOverride(): use the sysctl hw.acpi.os_name to
override the value for _OS.

Ideas from: takawata, jhb
Reviewed by: takawata, marcel
Tested on: i386, ia64

Resolve conflicts arising from the ACPI CA 20020815 import.

Add OS layer ACPI mutex and threading support.
- Temporary fix a bug of Intel ACPI CA core code.
- Add OS layer ACPI mutex support. This can be disabled by
specifying option ACPI_NO_SEMAPHORES.
- Add ACPI threading support. Now that we have a dedicate taskqueue for
ACPI tasks and more ACPI task threads can be created by specifying option
ACPI_MAX_THREADS.
- Change acpi_EvaluateIntoBuffer() behavior slightly to reuse given
caller's buffer unless AE_BUFFER_OVERFLOW occurs. Also CM battery's
evaluations were changed to use acpi_EvaluateIntoBuffer().
- Add new utility function acpi_ConvertBufferToInteger().
- Add simple locking for CM battery and temperature updating.
- Fix a minor problem on EC locking.
- Make the thermal zone polling rate to be changeable.
- Change minor things on AcpiOsSignal(); in ACPI_SIGNAL_FATAL case,
entering Debugger is easier to investigate the problem rather than panic.

Update the OSD module to match the ACPI CA 20010717 import.

Submitted by: "Grover, Andrew" <andrew.grover@intel.com> (OsdHardware.c)

FreeBSD-specific OSD (operating system dependant) modules for the Intel
ACPICA code.