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/** @file
Arm Gic Distributor Parser.
Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- linux/Documentation/devicetree/bindings/interrupt-controller/arm,gic.yaml
- linux/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml
**/
#include "CmObjectDescUtility.h"
#include "FdtHwInfoParser.h"
#include "Gic/ArmGicDispatcher.h"
#include "Gic/ArmGicDParser.h"
/** Parse a Gic compatible interrupt-controller node,
extracting GicD information.
This parser is valid for Gic v2 and v3.
@param [in] Fdt Pointer to a Flattened Device Tree (Fdt).
@param [in] GicIntcNode Offset of a Gic compatible
interrupt-controller node.
@param [in] GicDInfo The CM_ARM_GICD_INFO to populate.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_ABORTED An error occurred.
@retval EFI_INVALID_PARAMETER Invalid parameter.
**/
STATIC
EFI_STATUS
EFIAPI
GicDIntcNodeParser (
IN CONST VOID *Fdt,
IN INT32 GicIntcNode,
IN CM_ARM_GICD_INFO *GicDInfo
)
{
EFI_STATUS Status;
INT32 AddressCells;
CONST UINT8 *Data;
INT32 DataSize;
if ((Fdt == NULL) ||
(GicDInfo == NULL))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Status = FdtGetParentAddressInfo (Fdt, GicIntcNode, &AddressCells, NULL);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Don't support more than 64 bits and less than 32 bits addresses.
if ((AddressCells < 1) ||
(AddressCells > 2))
{
ASSERT (0);
return EFI_ABORTED;
}
Data = fdt_getprop (Fdt, GicIntcNode, "reg", &DataSize);
if ((Data == NULL) || (DataSize < (INT32)(AddressCells * sizeof (UINT32)))) {
// If error or not enough space.
ASSERT (0);
return EFI_ABORTED;
}
if (AddressCells == 2) {
GicDInfo->PhysicalBaseAddress = fdt64_to_cpu (*(UINT64 *)Data);
} else {
GicDInfo->PhysicalBaseAddress = fdt32_to_cpu (*(UINT32 *)Data);
}
return Status;
}
/** CM_ARM_GICD_INFO parser function.
This parser expects FdtBranch to be a Gic interrupt-controller node.
At most one CmObj is created.
The following structure is populated:
typedef struct CmArmGicDInfo {
UINT64 PhysicalBaseAddress; // {Populated}
UINT32 SystemVectorBase;
UINT8 GicVersion; // {Populated}
} CM_ARM_GICD_INFO;
A parser parses a Device Tree to populate a specific CmObj type. None,
one or many CmObj can be created by the parser.
The created CmObj are then handed to the parser's caller through the
HW_INFO_ADD_OBJECT interface.
This can also be a dispatcher. I.e. a function that not parsing a
Device Tree but calling other parsers.
@param [in] FdtParserHandle A handle to the parser instance.
@param [in] FdtBranch When searching for DT node name, restrict
the search to this Device Tree branch.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_ABORTED An error occurred.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_NOT_FOUND Not found.
@retval EFI_UNSUPPORTED Unsupported.
**/
EFI_STATUS
EFIAPI
ArmGicDInfoParser (
IN CONST FDT_HW_INFO_PARSER_HANDLE FdtParserHandle,
IN INT32 FdtBranch
)
{
EFI_STATUS Status;
UINT32 GicVersion;
CM_ARM_GICD_INFO GicDInfo;
VOID *Fdt;
if (FdtParserHandle == NULL) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Fdt = FdtParserHandle->Fdt;
if (!FdtNodeHasProperty (Fdt, FdtBranch, "interrupt-controller")) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// Get the Gic version of the interrupt-controller.
Status = GetGicVersion (Fdt, FdtBranch, &GicVersion);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
ZeroMem (&GicDInfo, sizeof (GicDInfo));
GicDInfo.GicVersion = GicVersion;
// Parse the interrupt-controller depending on its Gic version.
switch (GicVersion) {
case 2:
case 3:
{
// Set the Gic version, then parse the GicD information.
Status = GicDIntcNodeParser (Fdt, FdtBranch, &GicDInfo);
break;
}
default:
{
// Unsupported Gic version.
ASSERT (0);
return EFI_UNSUPPORTED;
}
}
// Add the CmObj to the Configuration Manager.
Status = AddSingleCmObj (
FdtParserHandle,
CREATE_CM_ARM_OBJECT_ID (EArmObjGicDInfo),
&GicDInfo,
sizeof (CM_ARM_GICD_INFO),
NULL
);
ASSERT_EFI_ERROR (Status);
return Status;
}
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