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/** @file
Definition for the Platform Runtime Mechanism (PRM) ACPI table (PRMT).
Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
Copyright (c) Microsoft Corporation
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef PRMT_ACPI_TABLE_H_
#define PRMT_ACPI_TABLE_H_
#include <Base.h>
#include <IndustryStandard/Acpi10.h>
#define PRM_TABLE_SIGNATURE SIGNATURE_32 ('P', 'R', 'M', 'T')
#define PRM_TABLE_REVISION 0x0
#define PRM_MODULE_INFORMATION_STRUCT_REVISION 0x00
#define PRM_HANDLER_INFORMATION_STRUCT_REVISION 0x00
#pragma pack(push, 1)
//
// Platform Runtime Mechanism (PRM) ACPI Table (PRMT) structures
//
typedef struct {
UINT16 StructureRevision; ///< Revision of this structure
UINT16 StructureLength; ///< Length in bytes of this structure
GUID Identifier; ///< GUID of the PRM handler for this structure
UINT64 PhysicalAddress; ///< Physical address of this PRM handler
UINT64 StaticDataBuffer; ///< Physical address of the static data buffer for
///< this PRM handler (PRM_DATA_BUFFER *)
UINT64 AcpiParameterBuffer; ///< Physical address of the parameter buffer
///< for this PRM handler (PRM_DATA_BUFFER *)
///< that is only used in the case of _DSM invocation.
///< If _DSM invocation is not used, this value is
///< ignored.
} PRM_HANDLER_INFORMATION_STRUCT;
typedef struct {
UINT16 StructureRevision; ///< Revision of this structure
UINT16 StructureLength; ///< Length in bytes of this structure including the
///< variable length PRM Handler Info array
GUID Identifier; ///< GUID of the PRM module for this structure
UINT16 MajorRevision; ///< PRM module major revision
UINT16 MinorRevision; ///< PRM module minor revision
UINT16 HandlerCount; ///< Number of entries in the Handler Info array
UINT32 HandlerInfoOffset; ///< Offset in bytes from the beginning of this
///< structure to the Handler Info array
UINT64 RuntimeMmioRanges; ///< Physical address of the PRM MMIO Ranges
///< structure (PRM_MODULE_RUNTIME_MMIO_RANGES *)
PRM_HANDLER_INFORMATION_STRUCT HandlerInfoStructure[1];
} PRM_MODULE_INFORMATION_STRUCT;
typedef struct {
EFI_ACPI_DESCRIPTION_HEADER Header; ///< Standard ACPI description header
GUID PrmPlatformGuid; ///< A GUID that uniquely identifies this platform.
///< Used to check for compatibility in PRM module
///< runtime updates.
UINT32 PrmModuleInfoOffset; ///< Offset in bytes from the beginning of this
///< structure to the PRM Module Info array
UINT32 PrmModuleInfoCount; ///< Number of entries in the PRM Module Info array
PRM_MODULE_INFORMATION_STRUCT PrmModuleInfoStructure[1];
} PRM_ACPI_DESCRIPTION_TABLE;
#pragma pack(pop)
//
// Helper macros to build PRM Information structures
//
// Todo: Revisit whether to use; currently both macros are not used
//
#define PRM_MODULE_INFORMATION_STRUCTURE(ModuleGuid, ModuleRevision, HandlerCount, PrmHanderInfoStructureArray) { \
{ \
PRM_MODULE_INFORMATION_STRUCT_REVISION, /* UINT16 StructureRevision; */ \
(OFFSET_OF (PRM_MODULE_INFORMATION_STRUCT, HandlerInfoStructure) + (HandlerCount * sizeof (PRM_HANDLER_INFORMATION_STRUCT))) /* UINT16 StructureLength; */ \
ModuleGuid, /* GUID ModuleGuid; */ \
ModuleRevision, /* UINT16 ModuleRevision */ \
HandlerCount, /* UINT16 HandlerCount */ \
OFFSET_OF (PRM_MODULE_INFORMATION_STRUCT, HandlerInfoOffset), /* UINT32 HandlerInfoOffset */ \
PrmHanderInfoStructureArray /* PRM_HANDLER_INFORMATION_STRUCT HandlerInfoStructure */ \
} \
}
#define PRM_HANDLER_INFORMATION_STRUCTURE(HandlerGuid, PhysicalAddress) { \
{ \
PRM_HANDLER_INFORMATION_STRUCT_REVISION, /* UINT16 StructureRevision; */ \
sizeof (PRM_HANDLER_INFORMATION_STRUCT), /* UINT16 StructureLength; */ \
HandlerGuid, /* GUID HandlerGuid; */ \
PhysicalAddress, /* UINT64 PhysicalAddress */ \
} \
}
#endif // _PRMT_ACPI_TABLE_H_
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