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DynamicTablesPkg: FdtHwInfoParser: Add GICR parser

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The GIC Redistributor (GICR) structure is part of the Multiple
APIC Description Table (MADT) that enables the discovery of
GIC Redistributor base addresses by providing the Physical Base
Address of a page range containing the GIC Redistributors. More
than one GICR Structure may be presented in the MADT. The GICR
structures should only be used when describing GIC version 3 or
higher.

The GIC Redistributor information is described in the platform
Device Tree, the bindings for which can be found at:
 - linux/Documentation/devicetree/bindings/interrupt-controller/
   arm,gic-v3.yaml

The FdtHwInfoParser implements a GIC Redistributor Parser that
parses the platform Device Tree to create CM_ARM_GIC_REDIST_INFO
objects which are encapsulated in a Configuration Manager
descriptor object and added to the platform information
repository.

The platform Configuration Manager can then utilise this
information when generating the MADT table.

Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
This commit is contained in:
Pierre Gondois
2021-12-09 10:32:04 +01:00
committed by mergify[bot]
parent d250d408cf
commit 7b6c8b30a5
2 changed files with 285 additions and 0 deletions
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47
DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicRParser.h Normal file
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/** @file
Arm Gic Redistributor 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-v3.yaml
**/
#ifndef ARM_GICR_PARSER_H_
#define ARM_GICR_PARSER_H_
/** CM_ARM_GIC_REDIST_INFO parser function.
This parser expects FdtBranch to be a Gic interrupt-controller node.
Gic version must be v3 or higher.
typedef struct CmArmGicRedistInfo {
UINT64 DiscoveryRangeBaseAddress; // {Populated}
UINT32 DiscoveryRangeLength; // {Populated}
} CM_ARM_GIC_REDIST_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
ArmGicRInfoParser (
IN CONST FDT_HW_INFO_PARSER_HANDLE FdtParserHandle,
IN INT32 FdtBranch
);
#endif // ARM_GICR_PARSER_H_