EFI: Add OSL supports for those can be empty.

This patch adds OSLs that can be empty under EFI environment. Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Yizhe Wang <yizhe.wang@intel.com>
EFI: Add stubs for multi-threading OSLs to make EFI ported applications running.

This patch only adds stub supports for multi-threading OSLs to make
EFI ported application running.

In order to fully support acpiexec in a non multi-threading environment,
ACPICA core itself need to be upgraded to contain full asynchrnous support.
Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Yizhe Wang <yizhe.wang@intel.com>
EFI: Add stubs for hardware access OSLs to make EFI ported applications running.

This patch only adds stub supports for hardware access OSLs to make EFI
ported application running.

This patch adds the following OSLs for efi:
1. AcpiOsInstallInterruptHandler()/RemoveInterruptHandler().
2. AcpiOsReadPort()/AcpiOsWritePort().
3. AcpiOsReadMemory()/AcpiOsWriteMemory().
3. AcpiOsReadPciConfigration()/AcpiOsWritePciConfiguration().
Currently we will not support real hardware accesses in the EFI
environment, so they can stay stubs. Yizhe Wang.

Signed-off-by: Yizhe Wang <yizhe.wang@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
EFI: Add table OSL supports for acpiexec.

This patch implements table OSLs for acpiexec in EFI environment:
1. Adds AcpiOsTableOverride() to use acpiexec loaded xSDT tables.
2. Adds a stub AcpiOsPhysicalTableOverride().
Note that currently we only support emulator mode acpiexec in EFI
environment, thus all table overrides, RSDP location are implemented in the
same way as its windows/unix versions. Yizhe Wang.

Signed-off-by: Yizhe Wang <yizhe.wang@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
EFI: Add AcpiOsGetTimer() support.

This patch adds AcpiOsGetTimer() support for EFI environment.
Note that currently we don't support timezone. Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
EFI: Add AcpiOsStall()/AcpiOsSleep() support.

This patch adds AcpiOsStall() and AcpiOsSleep() support.
Currently we do not support asynchronous polling of key stroke and timer,
so AcpiOsSleep() is simply an invocation of AcpiOsStall(). Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>