[IA64] add driver for ACPI methods to call native firmware

Browse source

This driver for HPQ5001 devices installs a global ACPI OpRegion handler.
AML methods can use this OpRegion to call native firmware entry points.

ACPI does not define a mechanism for AML methods to call native firmware
interfaces such as PAL or SAL.  This OpRegion handler adds such a mechanism.
After the handler is installed, an AML method can call native firmware by
storing the arguments and firmware entry point to specific offsets in the
OpRegion.  When AML reads the "return value" offset from the OpRegion, this
handler loads up the arguments, makes the firmware call, and returns the
result.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

...

This commit is contained in:

Bjorn Helgaas 2007-09-20 14:22:03 -06:00 • committed by Tony Luck

parent edbe7075d1

commit 28eda5b8b4

3 changed files with 247 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

10

arch/ia64/Kconfig

View file

1

arch/ia64/hp/common/Makefile

View file

236

arch/ia64/hp/common/aml_nfw.c

View file