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ArmPkg/ArmGicLib: manage GICv3 SPI state at the distributor 

Unlike SGIs and PPIs, which are private to the CPU and are managed at
the redistributor level (which is also a per-CPU construct), shared
interrupts (SPIs) are shared between all CPUs, and therefore managed at
the distributor level (just as on GICv2).

Reported-by: Narinder Dhillon <ndhillonv2@gmail.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel 2016-07-07 19:18:39 +02:00
parent 31441f2983
commit 28f8d28faa
1 changed files with 22 additions and 3 deletions
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25
ArmPkg/Drivers/ArmGic/ArmGicLib.c
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@ -19,6 +19,19 @@
#include <Library/IoLib.h>
#include <Library/PcdLib.h>
/**
*
* Return whether the Source interrupt index refers to a shared interrupt (SPI)
*/
STATIC
BOOLEAN
SourceIsSpi (
IN UINTN Source
)
{
return Source >= 32 && Source < 1020;
}
/**
* Return the base address of the GIC redistributor for the current CPU
*
@ -183,7 +196,9 @@ ArmGicEnableInterrupt (
RegShift = Source % 32;
Revision = ArmGicGetSupportedArchRevision ();
if ((Revision == ARM_GIC_ARCH_REVISION_2) || FeaturePcdGet (PcdArmGicV3WithV2Legacy)) {
if ((Revision == ARM_GIC_ARCH_REVISION_2) ||
FeaturePcdGet (PcdArmGicV3WithV2Legacy) ||
SourceIsSpi (Source)) {
// Write set-enable register
MmioWrite32 (GicDistributorBase + ARM_GIC_ICDISER + (4 * RegOffset), 1 << RegShift);
} else {
@ -216,7 +231,9 @@ ArmGicDisableInterrupt (
RegShift = Source % 32;
Revision = ArmGicGetSupportedArchRevision ();
if ((Revision == ARM_GIC_ARCH_REVISION_2) || FeaturePcdGet (PcdArmGicV3WithV2Legacy)) {
if ((Revision == ARM_GIC_ARCH_REVISION_2) ||
FeaturePcdGet (PcdArmGicV3WithV2Legacy) ||
SourceIsSpi (Source)) {
// Write clear-enable register
MmioWrite32 (GicDistributorBase + ARM_GIC_ICDICER + (4 * RegOffset), 1 << RegShift);
} else {
@ -249,7 +266,9 @@ ArmGicIsInterruptEnabled (
RegShift = Source % 32;
Revision = ArmGicGetSupportedArchRevision ();
if ((Revision == ARM_GIC_ARCH_REVISION_2) || FeaturePcdGet (PcdArmGicV3WithV2Legacy)) {
if ((Revision == ARM_GIC_ARCH_REVISION_2) ||
FeaturePcdGet (PcdArmGicV3WithV2Legacy) ||
SourceIsSpi (Source)) {
Interrupts = ((MmioRead32 (GicDistributorBase + ARM_GIC_ICDISER + (4 * RegOffset)) & (1 << RegShift)) != 0);
} else {
GicCpuRedistributorBase = GicGetCpuRedistributorBase (GicRedistributorBase, Revision);