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ArmPkg/ArmGic: Introduced ArmGicGetSupportedArchRevision()

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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
This commit is contained in:
Olivier Martin
2014-10-27 10:27:27 +00:00
committed by oliviermartin
parent f1e2b7283e
commit d5c6b7fca3
4 changed files with 68 additions and 13 deletions
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59
ArmPkg/Drivers/ArmGic/ArmGicLib.c
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@@ -19,6 +19,15 @@
#include "GicV2/ArmGicV2Lib.h"
ARM_GIC_ARCH_REVISION
EFIAPI
ArmGicGetSupportedArchRevision (
VOID
)
{
return ARM_GIC_ARCH_REVISION_2;
}
UINTN
EFIAPI
ArmGicGetInterfaceIdentification (
@@ -71,15 +80,22 @@ ArmGicAcknowledgeInterrupt (
)
{
UINTN Value;
ARM_GIC_ARCH_REVISION Revision;
Value = ArmGicV2AcknowledgeInterrupt (GicInterruptInterfaceBase);
// InterruptId is required for the caller to know if a valid or spurious
// interrupt has been read
ASSERT (InterruptId != NULL);
if (InterruptId != NULL) {
*InterruptId = Value & ARM_GIC_ICCIAR_ACKINTID;
Revision = ArmGicGetSupportedArchRevision ();
if (Revision == ARM_GIC_ARCH_REVISION_2) {
Value = ArmGicV2AcknowledgeInterrupt (GicInterruptInterfaceBase);
// InterruptId is required for the caller to know if a valid or spurious
// interrupt has been read
ASSERT (InterruptId != NULL);
if (InterruptId != NULL) {
*InterruptId = Value & ARM_GIC_ICCIAR_ACKINTID;
}
} else {
ASSERT_EFI_ERROR (EFI_UNSUPPORTED);
// Report Spurious interrupt which is what the above controllers would
// return if no interrupt was available
Value = 1023;
}
return Value;
@@ -92,7 +108,14 @@ ArmGicEndOfInterrupt (
IN UINTN Source
)
{
ArmGicV2EndOfInterrupt (GicInterruptInterfaceBase, Source);
ARM_GIC_ARCH_REVISION Revision;
Revision = ArmGicGetSupportedArchRevision ();
if (Revision == ARM_GIC_ARCH_REVISION_2) {
ArmGicV2EndOfInterrupt (GicInterruptInterfaceBase, Source);
} else {
ASSERT_EFI_ERROR (EFI_UNSUPPORTED);
}
}
VOID
@@ -164,7 +187,14 @@ ArmGicEnableInterruptInterface (
IN INTN GicInterruptInterfaceBase
)
{
return ArmGicV2EnableInterruptInterface (GicInterruptInterfaceBase);
ARM_GIC_ARCH_REVISION Revision;
Revision = ArmGicGetSupportedArchRevision ();
if (Revision == ARM_GIC_ARCH_REVISION_2) {
ArmGicV2EnableInterruptInterface (GicInterruptInterfaceBase);
} else {
ASSERT_EFI_ERROR (EFI_UNSUPPORTED);
}
}
VOID
@@ -173,5 +203,12 @@ ArmGicDisableInterruptInterface (
IN INTN GicInterruptInterfaceBase
)
{
return ArmGicV2DisableInterruptInterface (GicInterruptInterfaceBase);
ARM_GIC_ARCH_REVISION Revision;
Revision = ArmGicGetSupportedArchRevision ();
if (Revision == ARM_GIC_ARCH_REVISION_2) {
ArmGicV2DisableInterruptInterface (GicInterruptInterfaceBase);
} else {
ASSERT_EFI_ERROR (EFI_UNSUPPORTED);
}
}