ArmPkg/ArmGic: Introduced ArmGicGetSupportedArchRevision()
This function returns the revision of the GIC Architecture. Some GICv3 controllers can work in GICv2 mode. Switching to an older GIC revision is driven by the higher level exception level. This function allows code to support any GIC revision at runtime. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16231 6f19259b-4bc3-4df7-8a09-765794883524
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oliviermartin
parent
f1e2b7283e
commit
d5c6b7fca3
@@ -19,6 +19,15 @@
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#include "GicV2/ArmGicV2Lib.h"
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ARM_GIC_ARCH_REVISION
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EFIAPI
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ArmGicGetSupportedArchRevision (
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VOID
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)
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{
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return ARM_GIC_ARCH_REVISION_2;
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}
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UINTN
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EFIAPI
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ArmGicGetInterfaceIdentification (
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@@ -71,15 +80,22 @@ ArmGicAcknowledgeInterrupt (
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)
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{
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UINTN Value;
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ARM_GIC_ARCH_REVISION Revision;
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Value = ArmGicV2AcknowledgeInterrupt (GicInterruptInterfaceBase);
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// InterruptId is required for the caller to know if a valid or spurious
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// interrupt has been read
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ASSERT (InterruptId != NULL);
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if (InterruptId != NULL) {
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*InterruptId = Value & ARM_GIC_ICCIAR_ACKINTID;
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Revision = ArmGicGetSupportedArchRevision ();
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if (Revision == ARM_GIC_ARCH_REVISION_2) {
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Value = ArmGicV2AcknowledgeInterrupt (GicInterruptInterfaceBase);
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// InterruptId is required for the caller to know if a valid or spurious
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// interrupt has been read
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ASSERT (InterruptId != NULL);
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if (InterruptId != NULL) {
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*InterruptId = Value & ARM_GIC_ICCIAR_ACKINTID;
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}
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} else {
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ASSERT_EFI_ERROR (EFI_UNSUPPORTED);
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// Report Spurious interrupt which is what the above controllers would
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// return if no interrupt was available
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Value = 1023;
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}
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return Value;
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@@ -92,7 +108,14 @@ ArmGicEndOfInterrupt (
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IN UINTN Source
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)
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{
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ArmGicV2EndOfInterrupt (GicInterruptInterfaceBase, Source);
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ARM_GIC_ARCH_REVISION Revision;
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Revision = ArmGicGetSupportedArchRevision ();
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if (Revision == ARM_GIC_ARCH_REVISION_2) {
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ArmGicV2EndOfInterrupt (GicInterruptInterfaceBase, Source);
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} else {
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ASSERT_EFI_ERROR (EFI_UNSUPPORTED);
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}
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}
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VOID
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@@ -164,7 +187,14 @@ ArmGicEnableInterruptInterface (
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IN INTN GicInterruptInterfaceBase
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)
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{
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return ArmGicV2EnableInterruptInterface (GicInterruptInterfaceBase);
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ARM_GIC_ARCH_REVISION Revision;
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Revision = ArmGicGetSupportedArchRevision ();
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if (Revision == ARM_GIC_ARCH_REVISION_2) {
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ArmGicV2EnableInterruptInterface (GicInterruptInterfaceBase);
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} else {
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ASSERT_EFI_ERROR (EFI_UNSUPPORTED);
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}
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}
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VOID
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@@ -173,5 +203,12 @@ ArmGicDisableInterruptInterface (
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IN INTN GicInterruptInterfaceBase
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)
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{
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return ArmGicV2DisableInterruptInterface (GicInterruptInterfaceBase);
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ARM_GIC_ARCH_REVISION Revision;
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Revision = ArmGicGetSupportedArchRevision ();
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if (Revision == ARM_GIC_ARCH_REVISION_2) {
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ArmGicV2DisableInterruptInterface (GicInterruptInterfaceBase);
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} else {
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ASSERT_EFI_ERROR (EFI_UNSUPPORTED);
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}
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}
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