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DynamicTablesPkg: FdtHwInfoParserLib: Parse Pmu info 

Parse the Pmu interrupts if a pmu compatible node is present,
and populate the MADT GicC structure accordingly.

Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Pierre Gondois 2022-01-26 17:43:53 +01:00 committed by mergify[bot]
parent 742dafd2cc
commit 13136cc311
2 changed files with 136 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

132
DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicCParser.c
View File

@ -1,13 +1,14 @@
/** @file
Arm Gic cpu parser.
Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
Copyright (c) 2021 - 2022, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- linux/Documentation/devicetree/bindings/arm/cpus.yaml
- linux/Documentation/devicetree/bindings/interrupt-controller/arm,gic.yaml
- linux/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml
- linux/Documentation/devicetree/bindings/arm/pmu.yaml
**/
#include "FdtHwInfoParser.h"
@ -34,6 +35,21 @@ STATIC CONST COMPATIBILITY_INFO CpuCompatibleInfo = {
CpuCompatibleStr
};
/** Pmu compatible strings.
Any other "compatible" value is not supported by this module.
*/
STATIC CONST COMPATIBILITY_STR PmuCompatibleStr[] = {
{ "arm,armv8-pmuv3" }
};
/** COMPATIBILITY_INFO structure for the PmuCompatibleStr.
*/
CONST COMPATIBILITY_INFO PmuCompatibleInfo = {
ARRAY_SIZE (PmuCompatibleStr),
PmuCompatibleStr
};
/** Parse a "cpu" node.
@param [in] Fdt Pointer to a Flattened Device Tree (Fdt).
@ -639,6 +655,111 @@ GicCv3IntcNodeParser (
return EFI_SUCCESS;
}
/** Parse a Pmu compatible node, extracting Pmu information.
This function modifies a CM_OBJ_DESCRIPTOR object.
The following CM_ARM_GICC_INFO fields are patched:
- PerformanceInterruptGsiv;
@param [in] Fdt Pointer to a Flattened Device Tree (Fdt).
@param [in] GicIntcNode Offset of a Gic compatible
interrupt-controller node.
@param [in, out] GicCCmObjDesc The CM_ARM_GICC_INFO to patch.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_ABORTED An error occurred.
@retval EFI_INVALID_PARAMETER Invalid parameter.
**/
STATIC
EFI_STATUS
EFIAPI
GicCPmuNodeParser (
IN CONST VOID *Fdt,
IN INT32 GicIntcNode,
IN OUT CM_OBJ_DESCRIPTOR *GicCCmObjDesc
)
{
EFI_STATUS Status;
INT32 IntCells;
INT32 PmuNode;
UINT32 PmuNodeCount;
UINT32 PmuIrq;
UINT32 Index;
CM_ARM_GICC_INFO *GicCInfo;
CONST UINT8 *Data;
INT32 DataSize;
if (GicCCmObjDesc == NULL) {
ASSERT (GicCCmObjDesc != NULL);
return EFI_INVALID_PARAMETER;
}
GicCInfo = (CM_ARM_GICC_INFO *)GicCCmObjDesc->Data;
PmuNode = 0;
// Count the number of pmu nodes.
Status = FdtCountCompatNodeInBranch (
Fdt,
0,
&PmuCompatibleInfo,
&PmuNodeCount
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
if (PmuNodeCount == 0) {
return EFI_NOT_FOUND;
}
Status = FdtGetNextCompatNodeInBranch (
Fdt,
0,
&PmuCompatibleInfo,
&PmuNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
if (Status == EFI_NOT_FOUND) {
// Should have found the node.
Status = EFI_ABORTED;
}
}
// Get the number of cells used to encode an interrupt.
Status = FdtGetInterruptCellsInfo (Fdt, GicIntcNode, &IntCells);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
Data = fdt_getprop (Fdt, PmuNode, "interrupts", &DataSize);
if ((Data == NULL) || (DataSize != (IntCells * sizeof (UINT32)))) {
// If error or not 1 interrupt.
ASSERT (Data != NULL);
ASSERT (DataSize == (IntCells * sizeof (UINT32)));
return EFI_ABORTED;
}
PmuIrq = FdtGetInterruptId ((CONST UINT32 *)Data);
// Only supports PPI 23 for now.
// According to BSA 1.0 s3.6 PPI assignments, PMU IRQ ID is 23. A non BSA
// compliant system may assign a different IRQ for the PMU, however this
// is not implemented for now.
if (PmuIrq != BSA_PMU_IRQ) {
ASSERT (PmuIrq == BSA_PMU_IRQ);
return EFI_ABORTED;
}
for (Index = 0; Index < GicCCmObjDesc->Count; Index++) {
GicCInfo[Index].PerformanceInterruptGsiv = PmuIrq;
}
return EFI_SUCCESS;
}
/** CM_ARM_GICC_INFO parser function.
This parser expects FdtBranch to be the "\cpus" node node.
@ -649,7 +770,7 @@ GicCv3IntcNodeParser (
UINT32 AcpiProcessorUid; // {Populated}
UINT32 Flags; // {Populated}
UINT32 ParkingProtocolVersion; // {default = 0}
UINT32 PerformanceInterruptGsiv; // {default = 0}
UINT32 PerformanceInterruptGsiv; // {Populated}
UINT64 ParkedAddress; // {default = 0}
UINT64 PhysicalBaseAddress; // {Populated}
UINT64 GICV; // {Populated}
@ -764,6 +885,13 @@ ArmGicCInfoParser (
goto exit_handler;
}
// Parse the Pmu Interrupt.
Status = GicCPmuNodeParser (Fdt, IntcNode, NewCmObjDesc);
if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {
ASSERT_EFI_ERROR (Status);
goto exit_handler;
}
// Add all the CmObjs to the Configuration Manager.
Status = AddMultipleCmObj (FdtParserHandle, NewCmObjDesc, 0, NULL);
if (EFI_ERROR (Status)) {

8
DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicCParser.h
View File

@ -1,7 +1,7 @@
/** @file
Arm Gic cpu parser.
Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
Copyright (c) 2021 - 2022, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
@ -12,6 +12,10 @@
#ifndef ARM_GICC_PARSER_H_
#define ARM_GICC_PARSER_H_
/* According to BSA 1.0 s3.6 PPI assignments, PMU IRQ ID is 23.
*/
#define BSA_PMU_IRQ 23
/** CM_ARM_GICC_INFO parser function.
This parser expects FdtBranch to be the "\cpus" node node.
@ -22,7 +26,7 @@
UINT32 AcpiProcessorUid; // {Populated}
UINT32 Flags; // {Populated}
UINT32 ParkingProtocolVersion; // {default = 0}
UINT32 PerformanceInterruptGsiv; // {default = 0}
UINT32 PerformanceInterruptGsiv; // {Populated}
UINT64 ParkedAddress; // {default = 0}
UINT64 PhysicalBaseAddress; // {Populated}
UINT64 GICV; // {Populated}