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ArmPkg/ArmGic: Implement GICv3+ version of GIC driver

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Most platforms do not require the flexibility of the ordinary GIC
driver, which supports both GICv2 and GICv3+, and decides at runtime
which version to use.

So expose a GICv3+ version, which only supports a GICv3 or newer.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2025-01-16 18:48:47 +01:00 committed by mergify[bot]
parent 86119ff79e
commit 9d1a9b426e
3 changed files with 65 additions and 0 deletions
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1
ArmPkg/ArmPkg.dsc
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@ -126,6 +126,7 @@
ArmPkg/Drivers/CpuPei/CpuPei.inf
ArmPkg/Drivers/ArmGic/ArmGicDxe.inf
ArmPkg/Drivers/ArmGic/ArmGicV2Dxe.inf
ArmPkg/Drivers/ArmGic/ArmGicV3Dxe.inf
ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.inf
ArmPkg/Drivers/TimerDxe/TimerDxe.inf

57
ArmPkg/Drivers/ArmGic/ArmGicV3Dxe.inf Normal file
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@ -0,0 +1,57 @@
#/** @file
#
# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
# Copyright (c) 2012 - 2017, ARM Ltd. All rights reserved.<BR>
# Copyright (c) 2025, Google LLC. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
#**/
[Defines]
INF_VERSION = 1.30
BASE_NAME = ArmGicV3Dxe
FILE_GUID = 953ff472-9b9e-4058-84cf-227daf89dc82
MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
ENTRY_POINT = GicV3DxeInitialize
[Sources.common]
ArmGicCommonDxe.c
ArmGicDxe.c
ArmGicDxe.h
GicV3/ArmGicV3Dxe.c
[Sources.ARM]
GicV3/Arm/ArmGicV3.S | GCC
[Sources.AARCH64]
GicV3/AArch64/ArmGicV3.S
[Packages]
MdePkg/MdePkg.dec
EmbeddedPkg/EmbeddedPkg.dec
ArmPkg/ArmPkg.dec
[LibraryClasses]
ArmLib
BaseLib
DebugLib
IoLib
PcdLib
PrintLib
UefiBootServicesTableLib
UefiDriverEntryPoint
UefiLib
[Protocols]
gHardwareInterruptProtocolGuid ## PRODUCES
gHardwareInterrupt2ProtocolGuid ## PRODUCES
gEfiCpuArchProtocolGuid ## CONSUMES ## NOTIFY
[Pcd.common]
gArmTokenSpaceGuid.PcdGicDistributorBase
gArmTokenSpaceGuid.PcdGicRedistributorsBase
[Depex]
TRUE

7
ArmPkg/Drivers/ArmGic/GicV3/ArmGicV3Dxe.c
View File

@ -628,6 +628,7 @@ GicV3DxeInitialize (
UINTN Index;
UINT64 MpId;
UINT64 CpuTarget;
UINT64 RegValue;
// Make sure the Interrupt Controller Protocol is not already installed in
// the system.
@ -637,6 +638,12 @@ GicV3DxeInitialize (
mGicRedistributorsBase = PcdGet64 (PcdGicRedistributorsBase);
mGicNumInterrupts = ArmGicGetMaxNumInterrupts (mGicDistributorBase);
RegValue = ArmGicV3GetControlSystemRegisterEnable ();
if ((RegValue & ICC_SRE_EL2_SRE) == 0) {
ArmGicV3SetControlSystemRegisterEnable (RegValue | ICC_SRE_EL2_SRE);
ASSERT ((ArmGicV3GetControlSystemRegisterEnable () & ICC_SRE_EL2_SRE) != 0);
}
// We will be driving this GIC in native v3 mode, i.e., with Affinity
// Routing enabled. So ensure that the ARE bit is set.
MmioOr32 (mGicDistributorBase + ARM_GIC_ICDDCR, ARM_GIC_ICDDCR_ARE);