diff options
Diffstat (limited to 'roms/edk2/ArmVirtPkg/Library/ArmVirtGicArchLib')
| -rw-r--r-- | roms/edk2/ArmVirtPkg/Library/ArmVirtGicArchLib/ArmVirtGicArchLib.c | 149 | ||||
| -rw-r--r-- | roms/edk2/ArmVirtPkg/Library/ArmVirtGicArchLib/ArmVirtGicArchLib.inf | 44 |
2 files changed, 193 insertions, 0 deletions
diff --git a/roms/edk2/ArmVirtPkg/Library/ArmVirtGicArchLib/ArmVirtGicArchLib.c b/roms/edk2/ArmVirtPkg/Library/ArmVirtGicArchLib/ArmVirtGicArchLib.c new file mode 100644 index 000000000..5448865ad --- /dev/null +++ b/roms/edk2/ArmVirtPkg/Library/ArmVirtGicArchLib/ArmVirtGicArchLib.c @@ -0,0 +1,149 @@ +/** @file
+ ArmGicArchLib library class implementation for DT based virt platforms
+
+ Copyright (c) 2015 - 2016, Linaro Ltd. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+#include <Uefi.h>
+
+#include <Library/ArmGicLib.h>
+#include <Library/ArmGicArchLib.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#include <Protocol/FdtClient.h>
+
+STATIC ARM_GIC_ARCH_REVISION mGicArchRevision;
+
+RETURN_STATUS
+EFIAPI
+ArmVirtGicArchLibConstructor (
+ VOID
+ )
+{
+ UINT32 IccSre;
+ FDT_CLIENT_PROTOCOL *FdtClient;
+ CONST UINT64 *Reg;
+ UINT32 RegSize;
+ UINTN AddressCells, SizeCells;
+ UINTN GicRevision;
+ EFI_STATUS Status;
+ UINT64 DistBase, CpuBase, RedistBase;
+ RETURN_STATUS PcdStatus;
+
+ Status = gBS->LocateProtocol (&gFdtClientProtocolGuid, NULL,
+ (VOID **)&FdtClient);
+ ASSERT_EFI_ERROR (Status);
+
+ GicRevision = 2;
+ Status = FdtClient->FindCompatibleNodeReg (FdtClient, "arm,cortex-a15-gic",
+ (CONST VOID **)&Reg, &AddressCells, &SizeCells,
+ &RegSize);
+ if (Status == EFI_NOT_FOUND) {
+ GicRevision = 3;
+ Status = FdtClient->FindCompatibleNodeReg (FdtClient, "arm,gic-v3",
+ (CONST VOID **)&Reg, &AddressCells, &SizeCells,
+ &RegSize);
+ }
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ switch (GicRevision) {
+
+ case 3:
+ //
+ // The GIC v3 DT binding describes a series of at least 3 physical (base
+ // addresses, size) pairs: the distributor interface (GICD), at least one
+ // redistributor region (GICR) containing dedicated redistributor
+ // interfaces for all individual CPUs, and the CPU interface (GICC).
+ // Under virtualization, we assume that the first redistributor region
+ // listed covers the boot CPU. Also, our GICv3 driver only supports the
+ // system register CPU interface, so we can safely ignore the MMIO version
+ // which is listed after the sequence of redistributor interfaces.
+ // This means we are only interested in the first two memory regions
+ // supplied, and ignore everything else.
+ //
+ ASSERT (RegSize >= 32);
+
+ // RegProp[0..1] == { GICD base, GICD size }
+ DistBase = SwapBytes64 (Reg[0]);
+ ASSERT (DistBase < MAX_UINTN);
+
+ // RegProp[2..3] == { GICR base, GICR size }
+ RedistBase = SwapBytes64 (Reg[2]);
+ ASSERT (RedistBase < MAX_UINTN);
+
+ PcdStatus = PcdSet64S (PcdGicDistributorBase, DistBase);
+ ASSERT_RETURN_ERROR (PcdStatus);
+ PcdStatus = PcdSet64S (PcdGicRedistributorsBase, RedistBase);
+ ASSERT_RETURN_ERROR (PcdStatus);
+
+ DEBUG ((EFI_D_INFO, "Found GIC v3 (re)distributor @ 0x%Lx (0x%Lx)\n",
+ DistBase, RedistBase));
+
+ //
+ // The default implementation of ArmGicArchLib is responsible for enabling
+ // the system register interface on the GICv3 if one is found. So let's do
+ // the same here.
+ //
+ IccSre = ArmGicV3GetControlSystemRegisterEnable ();
+ if (!(IccSre & ICC_SRE_EL2_SRE)) {
+ ArmGicV3SetControlSystemRegisterEnable (IccSre | ICC_SRE_EL2_SRE);
+ IccSre = ArmGicV3GetControlSystemRegisterEnable ();
+ }
+
+ //
+ // Unlike the default implementation, there is no fall through to GICv2
+ // mode if this GICv3 cannot be driven in native mode due to the fact
+ // that the System Register interface is unavailable.
+ //
+ ASSERT (IccSre & ICC_SRE_EL2_SRE);
+
+ mGicArchRevision = ARM_GIC_ARCH_REVISION_3;
+ break;
+
+ case 2:
+ //
+ // When the GICv2 is emulated with virtualization=on, it adds a virtual
+ // set of control registers. This means the register property can be
+ // either 32 or 64 bytes in size.
+ //
+ ASSERT ((RegSize == 32) || (RegSize == 64));
+
+ DistBase = SwapBytes64 (Reg[0]);
+ CpuBase = SwapBytes64 (Reg[2]);
+ ASSERT (DistBase < MAX_UINTN);
+ ASSERT (CpuBase < MAX_UINTN);
+
+ PcdStatus = PcdSet64S (PcdGicDistributorBase, DistBase);
+ ASSERT_RETURN_ERROR (PcdStatus);
+ PcdStatus = PcdSet64S (PcdGicInterruptInterfaceBase, CpuBase);
+ ASSERT_RETURN_ERROR (PcdStatus);
+
+ DEBUG ((EFI_D_INFO, "Found GIC @ 0x%Lx/0x%Lx\n", DistBase, CpuBase));
+
+ mGicArchRevision = ARM_GIC_ARCH_REVISION_2;
+ break;
+
+ default:
+ DEBUG ((EFI_D_ERROR, "%a: No GIC revision specified!\n", __FUNCTION__));
+ return RETURN_NOT_FOUND;
+ }
+ return RETURN_SUCCESS;
+}
+
+ARM_GIC_ARCH_REVISION
+EFIAPI
+ArmGicGetSupportedArchRevision (
+ VOID
+ )
+{
+ return mGicArchRevision;
+}
diff --git a/roms/edk2/ArmVirtPkg/Library/ArmVirtGicArchLib/ArmVirtGicArchLib.inf b/roms/edk2/ArmVirtPkg/Library/ArmVirtGicArchLib/ArmVirtGicArchLib.inf new file mode 100644 index 000000000..43fcb0b73 --- /dev/null +++ b/roms/edk2/ArmVirtPkg/Library/ArmVirtGicArchLib/ArmVirtGicArchLib.inf @@ -0,0 +1,44 @@ +#/** @file
+#
+# Component description file for ArmVirtGicArchLib module
+#
+# Copyright (c) 2015, Linaro Ltd. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = ArmVirtGicArchLib
+ FILE_GUID = 87b0dc84-4661-4deb-a789-97977ff636ed
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = ArmGicArchLib|DXE_DRIVER UEFI_DRIVER UEFI_APPLICATION
+ CONSTRUCTOR = ArmVirtGicArchLibConstructor
+
+[Sources]
+ ArmVirtGicArchLib.c
+
+[LibraryClasses]
+ ArmGicLib
+ BaseLib
+ DebugLib
+ PcdLib
+ UefiBootServicesTableLib
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ ArmVirtPkg/ArmVirtPkg.dec
+ MdePkg/MdePkg.dec
+
+[Protocols]
+ gFdtClientProtocolGuid ## CONSUMES
+
+[Pcd]
+ gArmTokenSpaceGuid.PcdGicDistributorBase
+ gArmTokenSpaceGuid.PcdGicRedistributorsBase
+ gArmTokenSpaceGuid.PcdGicInterruptInterfaceBase
+
+[Depex]
+ gFdtClientProtocolGuid
|