audk/OvmfPkg/AcpiTables
jljusten a42bdfccc3 OvmfPkg: _DIS and _SRS methods should have permanent effect
Kill PDIS and PSRS as they are writing to copies of PIR[A-D], not PIR[A-D]
themselves. Use specialized _DIS and _SRS methods that access PIR[A-D]
directly.

(This should be solvable by passing RefOf (PIRA) etc to PDIS/PSRS, however
the RHEL-6.3 kernel AML parser seems to choke on it. The rules described
in ACPIspec5.0 Table 19-316 "Object Storing and Copying Rules" don't seem
to work:

    ACPI Error: Needed [Integer/String/Buffer], found [Reference]
    ffff88003ee02420 (20090903/exresop-422)

    ACPI Exception: AE_AML_OPERAND_TYPE, While resolving operands for
    [OpcodeName unavailable] (20090903/dswexec-445)

    ACPI Error (psparse-0537): Method parse/execution failed
    [\_SB_.PCI0.LPC_.PDIS] (Node ffff88003f638b50), AE_AML_OPERAND_TYPE

    ACPI Error (psparse-0537): Method parse/execution failed
    [\_SB_.PCI0.LPC_.LNKA._DIS] (Node ffff88003f638a10),
    AE_AML_OPERAND_TYPE

When changing the method too, so that it writes to DerefOf (Arg0) instead
of Arg0, ie. explicitly dereferencing rather than expecting the auto-deref
to work:

    ACPI Error: Needed type [Reference], found [RegionField]
    ffff88003f639858 (20090903/exresop-104)

    ACPI Exception: AE_AML_OPERAND_TYPE, While resolving operands for
    [OpcodeName unavailable] (20090903/dswexec-445)

    ACPI Error (psparse-0537): Method parse/execution failed
    [\_SB_.PCI0.LPC_.PDIS] (Node ffff88003f638b50), AE_AML_OPERAND_TYPE

    ACPI Error (psparse-0537): Method parse/execution failed
    [\_SB_.PCI0.LPC_.LNKA._DIS] (Node ffff88003f638a10),
    AE_AML_OPERAND_TYPE

In short, when passing a RefOf, it is recognized as a reference inside the
method but mistakenly refused. When trying to deref it explicitly with
DerefOf, then it's suddenly not recognized as a reference.)

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13621 6f19259b-4bc3-4df7-8a09-765794883524
2012-08-13 15:40:31 +00:00
..
AcpiTables.inf OvmfPkg: install an SSDT with a dynamic OperationRegion called FWDT 2012-07-31 18:17:51 +00:00
Dsdt.asl OvmfPkg: _DIS and _SRS methods should have permanent effect 2012-08-13 15:40:31 +00:00
Facp.aslc OvmfPkg: sync FADT with QEMU: boot architecture flags 2012-08-13 15:39:20 +00:00
Facs.aslc Update the copyright notice format 2010-04-28 12:43:04 +00:00
Madt.aslc OvmfPkg ACPI MADT: Make processor IDs zero based 2012-05-30 23:15:42 +00:00
Platform.h OvmfPkg: sync FADT with QEMU: PM Timer is 24-bit 2012-08-13 15:39:32 +00:00
Ssdt.asl OvmfPkg: install an SSDT with a dynamic OperationRegion called FWDT 2012-07-31 18:17:51 +00:00