diff options
| -rw-r--r-- | DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicDParser.c | 171 | ||||
| -rw-r--r-- | DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicDParser.h | 50 |
2 files changed, 221 insertions, 0 deletions
diff --git a/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicDParser.c b/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicDParser.c new file mode 100644 index 0000000000..b7f5696729 --- /dev/null +++ b/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicDParser.c @@ -0,0 +1,171 @@ +/** @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;
+}
diff --git a/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicDParser.h b/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicDParser.h new file mode 100644 index 0000000000..b9581f0eb9 --- /dev/null +++ b/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicDParser.h @@ -0,0 +1,50 @@ +/** @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
+**/
+
+#ifndef ARM_GICD_PARSER_H_
+#define ARM_GICD_PARSER_H_
+
+/** 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
+ );
+
+#endif // ARM_GICD_PARSER_H_
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