From: Pierre Gondois <pierre.gond...@arm.com>
The _STA object is defined in ACPI 6.4, s6.3.7 "_STA (Device Status)"
and describes the status of a device. Add this method for the
generated processor devices.
To be coherent with the GicC flags available in s5.2.12.14 "GIC CPU
Interface (GICC) Structure", flip the _STA 'device enable' bit
according to the GicC 'Enabled' bit flag.
Signed-off-by: Pierre Gondois <pierre.gond...@arm.com>
---
.../SsdtCpuTopologyGenerator.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git
a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtCpuTopologyLibArm/SsdtCpuTopologyGenerator.c
b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtCpuTopologyLibArm/SsdtCpuTopologyGenerator.c
index 3266d8dd9892..d601f8e2190f 100644
---
a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtCpuTopologyLibArm/SsdtCpuTopologyGenerator.c
+++
b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtCpuTopologyLibArm/SsdtCpuTopologyGenerator.c
@@ -1,7 +1,7 @@
/** @file
SSDT Cpu Topology Table Generator.
- Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
+ Copyright (c) 2021 - 2022, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
@@ -477,6 +477,7 @@ CreateAmlCpu (
EFI_STATUS Status;
AML_OBJECT_NODE_HANDLE CpuNode;
CHAR8 AslName[AML_NAME_SEG_SIZE + 1];
+ BOOLEAN CpuEnabled;
ASSERT (Generator != NULL);
ASSERT (ParentNode != NULL);
@@ -516,6 +517,22 @@ CreateAmlCpu (
return Status;
}
+ CpuEnabled = ((GicCInfo->Flags & EFI_ACPI_6_2_GIC_ENABLED) != 0);
+
+ Status = AmlCodeGenMethodRetInteger (
+ "_STA",
+ CpuEnabled ? 0xF : 0xD,
+ 0,
+ FALSE,
+ 0,
+ CpuNode,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
// If requested, return the handle to the CpuNode.
if (CpuNodePtr != NULL) {
*CpuNodePtr = CpuNode;
--
2.25.1
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