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/** @file
Arm Gic dispatcher.
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 "FdtHwInfoParser.h"
#include "Gic/ArmGicCParser.h"
#include "Gic/ArmGicDispatcher.h"
#include "Gic/ArmGicDParser.h"
#include "Gic/ArmGicItsParser.h"
#include "Gic/ArmGicMsiFrameParser.h"
#include "Gic/ArmGicRParser.h"
/** List of "compatible" property values for GicV2 interrupt nodes.
Any other "compatible" value is not supported by this module.
*/
STATIC CONST COMPATIBILITY_STR GicV2CompatibleStr[] = {
{ "arm,cortex-a15-gic" }
};
/** COMPATIBILITY_INFO structure for the GICv2.
*/
CONST COMPATIBILITY_INFO GicV2CompatibleInfo = {
ARRAY_SIZE (GicV2CompatibleStr),
GicV2CompatibleStr
};
/** List of "compatible" property values for GicV3 interrupt nodes.
Any other "compatible" value is not supported by this module.
*/
STATIC CONST COMPATIBILITY_STR GicV3CompatibleStr[] = {
{ "arm,gic-v3" }
};
/** COMPATIBILITY_INFO structure for the GICv3.
*/
CONST COMPATIBILITY_INFO GicV3CompatibleInfo = {
ARRAY_SIZE (GicV3CompatibleStr),
GicV3CompatibleStr
};
/** Get the Gic version of am interrupt-controller node.
@param [in] Fdt Pointer to a Flattened Device Tree (Fdt).
@param [in] IntcNode Interrupt-controller node.
@param [out] GicVersion If success, contains the Gic version of the
interrupt-controller node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_UNSUPPORTED Unsupported.
**/
EFI_STATUS
EFIAPI
GetGicVersion (
IN CONST VOID *Fdt,
IN INT32 IntcNode,
OUT UINT32 *GicVersion
)
{
if ((Fdt == NULL) ||
(GicVersion == NULL))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
if (FdtNodeIsCompatible (Fdt, IntcNode, &GicV2CompatibleInfo)) {
*GicVersion = 2;
} else if (FdtNodeIsCompatible (Fdt, IntcNode, &GicV3CompatibleInfo)) {
*GicVersion = 3;
} else {
// Unsupported Gic version.
ASSERT (0);
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
}
/** Gic dispatcher.
This disptacher populates the following structures:
- CM_ARM_GICC_INFO
- CM_ARM_GICD_INFO
- CM_ARM_GIC_MSI_FRAME_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
ArmGicDispatcher (
IN CONST FDT_HW_INFO_PARSER_HANDLE FdtParserHandle,
IN INT32 FdtBranch
)
{
EFI_STATUS Status;
INT32 CpusNode;
INT32 IntcNode;
UINT32 GicVersion;
VOID *Fdt;
if (FdtParserHandle == NULL) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Fdt = FdtParserHandle->Fdt;
// The "cpus" node resides at the root of the DT. Fetch it.
CpusNode = fdt_path_offset (Fdt, "/cpus");
if (CpusNode < 0) {
return EFI_NOT_FOUND;
}
// Get the interrupt-controller node associated to the "cpus" node.
Status = FdtGetIntcParentNode (Fdt, CpusNode, &IntcNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
if (Status == EFI_NOT_FOUND) {
// Should have found the node.
Status = EFI_ABORTED;
}
return Status;
}
Status = GetGicVersion (Fdt, IntcNode, &GicVersion);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Parse the GicC information.
Status = ArmGicCInfoParser (FdtParserHandle, CpusNode);
if (EFI_ERROR (Status)) {
// Don't try to parse GicD and GicMsiFrame information
// if no GicC information is found. Return.
ASSERT (Status == EFI_NOT_FOUND);
return Status;
}
// Parse the GicD information of the "cpus" interrupt-controller node.
Status = ArmGicDInfoParser (FdtParserHandle, IntcNode);
if (EFI_ERROR (Status)) {
// EFI_NOT_FOUND is not tolerated at this point.
ASSERT (0);
return Status;
}
switch (GicVersion) {
case 4:
case 3:
{
// Parse the GicR information of the interrupt-controller node.
Status = ArmGicRInfoParser (FdtParserHandle, IntcNode);
if (EFI_ERROR (Status)) {
// EFI_NOT_FOUND is not tolerated at this point.
ASSERT (0);
return Status;
}
// Parse the GicIts information of the interrupt-controller node.
Status = ArmGicItsInfoParser (FdtParserHandle, IntcNode);
if (EFI_ERROR (Status) &&
(Status != EFI_NOT_FOUND))
{
ASSERT (0);
return Status;
}
break;
}
case 2:
{
// Parse the GicMsiFrame information.
Status = ArmGicMsiFrameInfoParser (FdtParserHandle, IntcNode);
if (EFI_ERROR (Status) &&
(Status != EFI_NOT_FOUND))
{
ASSERT (0);
return Status;
}
break;
}
default:
{
ASSERT (0);
return EFI_UNSUPPORTED;
}
}
return EFI_SUCCESS;
}
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