Tianocore/edk2.git/DynamicTablesPkg/Library/FdtHwInfoParserLib/Arm/GenericTimer/ArmGenericTimerParser.c, branch master

DynamicTablesPkg/HwInfoParser: Add FdtResolveInterrupt()

2026-09-11T09:05:39+00:00

The Devicetree Specification [1] defines the concept of interrupt mapping, interrupt domain, interrupt nexus and interrupt controller. An interrupt property might need to be translated through an interrupt nexus to obtain the interrupt type, id, flags. Add a FdtResolveInterrupt() function, resolving an interrupt property through interrupt nexuses until reaching the interrupt-controller node. Make use of FdtResolveInterrupt() wherever relevant. This allows to handle the presence of interrupt nexus by default. [1] Spec. v0.4, s2.4 Interrupts and Interrupt Mapping Signed-off-by: Pierre Gondois

DynamicTablesPkg/HwInfoParser: Add Size param to interrupt getters

2026-09-11T09:05:39+00:00

Add a Size parameter to: - FdtGetInterruptId() - FdtGetInterruptFlags() This allows to check the size of the interrupt data to parse inside the later functions. Signed-off-by: Pierre Gondois

DynamicTablesPkg/HwInfoParser: Relax GetNodeInterruptCells()

2026-09-11T09:05:39+00:00

FdtGetInterruptCellsInfo() expects to receive an interrupt controller node. However, a common use-case is to get the "#interrupt-cells" of a non interrupt-controller node in order to decode an "interrupts" property. Add a "SearchInHierarchy" parameter to FdtGetInterruptCellsInfo() to conditionnaly relax the function and either get the "#interrupt-cells" property: - from the input node - from the hierachy of the input node. Signed-off-by: Pierre Gondois

DynamicTablesPkg/HwInfoParser: Split FdtGetIntcParentNode()

2026-09-11T09:05:39+00:00

The Devicetree Specification [1] defines the concept of interrupt mapping, interrupt domain, interrupt nexus and interrupt controller. The "interrupt-controller" property defines a node as an interrupt controller. The "interrupt-map" property defines a node as an interrupt nexus. Both node types are defined as the root of an interrupt domain. A GIC (Generic Interrupt Controller) is an interrupt controller. The GIC version should be fetched to the matching device tree node. A node defining an interrupt domain might not necessarily be an interrupt controller and contain this information. Introduce 2 functions: - FdtGetIntControllerNode() - FdtGetIntDomainNode()` to distinguish the 2 concepts. As the presence of interrupt nexus/domains is currently not supported, replace FdtGetIntcParentNode() calls with FdtGetIntControllerNode(). The distinction will be useful in following patches. Also, update the detection of an interrupt domain to the presence of one of these properties: - interrupt-controller - interrupt-map instead of relying on the presence of the #interrupt-cells property, which is not a guarantee. [1] Spec. v0.4, s2.4 Interrupts and Interrupt Mapping Signed-off-by: Pierre Gondois

DynamicTablesPkg/HwInfoParser: Rename FdtGetIntcParentNode

2026-09-11T09:05:39+00:00

The interrupt parent of a node is: - the node pointed by the "interrupt-parent" property if the property is present - the direct parent otherwise. FdtGetIntcParentNode() doesn't aim to find the next parent node in the interrupt hierarchy. It aims to find the interrupt-controller node upon which the input node depends. This interrupt-controller node might be multiple nodes up in the device tree hierarchy. Thus, rename FdtGetIntcParentNode() to FdtGetIntcNode() to make the function name less ambiguous and prepare for the addition of a function which gets the next parent node in an interrupt hierarchy. No functional change. Signed-off-by: Pierre Gondois

DynamicTablesPkg: Support EL2 virtual timer in ArmGenericTimerParser

2026-07-31T13:57:58+00:00

When edk2 runs as a kvmtool guest with nested virtualization enabled, the Arm architectural timer DT node contains five interrupt specifiers. The fifth interrupt describes the EL2 virtual timer. ArmGenericTimerParser currently expects exactly four timer interrupts. It therefore asserts when parsing the timer node generated for a nested virtualization guest. Determine the number of interrupt specifiers present in the DT and populate each architectural timer entry only when it is available. Add support for the EL2 virtual timer and use it to populate the VirtualPL2Timer fields in the generated GTDT information. Tested as a KVM guest at EL1 and EL2, with both E2H==0 and E2H==1. Signed-off-by: Marc Zyngier [Varshit Pandya: Rewrite commit message for clarity.] Ref: https://edk2.groups.io/g/devel/message/122008 Signed-off-by: Varshit Pandya

ArmVirtPkg,DynamicTablesPkg,EmbeddedPkg,OvmfPkg: use MdePkg BaseFdtLib

2025-04-30T10:56:03+00:00

Migrate these packages to use the up-to-date BaseFdtLib instead of the EmbeddedPkg relic that is going away. Continuous-integration-options: PatchCheck.ignore-multi-package Signed-off-by: Leif Lindholm

DynamicTablesPkg/FdtHwInfoParserLib: add missing resolutions/includes

2024-09-27T07:40:06+00:00

FdtHwInfoParserLib does not explicitly call out its dependencies on BaseLib/BaseMemoryLib, which is currently hidden when EmbeddedPkg FdtLib pulls them in instead. But that is going away, so make the necessary explicit references and add missing include statements. Signed-off-by: Leif Lindholm

DynamicTablesPkg: FdtHwInfoParserLib: Move ARM parsers to Arm directory

2024-07-29T13:44:55+00:00

Create an Arm directory in the FdtHwInfoParserLib as a preparation step to support other architectures. Suggested-by: Sunil V L Signed-off-by: Pierre Gondois Reviewed-by: Sami Mujawar