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81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/** @file
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EFI MM Configuration Protocol as defined in the PI 1.5 specification.
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This protocol is used to:
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1) report the portions of MMRAM regions which cannot be used for the MMRAM heap.
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2) register the MM Foundation entry point with the processor code. The entry
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point will be invoked by the MM processor entry code.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _MM_CONFIGURATION_H_
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#define _MM_CONFIGURATION_H_
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#include <Pi/PiMmCis.h>
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#define EFI_MM_CONFIGURATION_PROTOCOL_GUID \
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{ \
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0x26eeb3de, 0xb689, 0x492e, {0x80, 0xf0, 0xbe, 0x8b, 0xd7, 0xda, 0x4b, 0xa7 } \
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}
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///
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/// Structure describing a MMRAM region which cannot be used for the MMRAM heap.
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///
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typedef struct _EFI_MM_RESERVED_MMRAM_REGION {
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///
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/// Starting address of the reserved MMRAM area, as it appears while MMRAM is open.
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/// Ignored if MmramReservedSize is 0.
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///
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EFI_PHYSICAL_ADDRESS MmramReservedStart;
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///
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/// Number of bytes occupied by the reserved MMRAM area. A size of zero indicates the
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/// last MMRAM area.
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///
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UINT64 MmramReservedSize;
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} EFI_MM_RESERVED_MMRAM_REGION;
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typedef struct _EFI_MM_CONFIGURATION_PROTOCOL EFI_MM_CONFIGURATION_PROTOCOL;
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/**
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Register the MM Foundation entry point.
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This function registers the MM Foundation entry point with the processor code. This entry point
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will be invoked by the MM Processor entry code.
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@param[in] This The EFI_MM_CONFIGURATION_PROTOCOL instance.
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@param[in] MmEntryPoint MM Foundation entry point.
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@retval EFI_SUCCESS Success to register MM Entry Point.
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@retval EFI_INVALID_PARAMETER MmEntryPoint is NULL.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_MM_REGISTER_MM_ENTRY)(
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IN CONST EFI_MM_CONFIGURATION_PROTOCOL *This,
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IN EFI_MM_ENTRY_POINT MmEntryPoint
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);
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///
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/// The EFI MM Configuration Protocol is a mandatory protocol published by a DXE CPU driver to
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/// indicate which areas within MMRAM are reserved for use by the CPU for any purpose,
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/// such as stack, save state or MM entry point.
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///
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/// The RegistermmEntry() function allows the MM IPL DXE driver to register the MM
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/// Foundation entry point with the MM entry vector code.
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///
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struct _EFI_MM_CONFIGURATION_PROTOCOL {
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///
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/// A pointer to an array MMRAM ranges used by the initial MM entry code.
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///
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EFI_MM_RESERVED_MMRAM_REGION *MmramReservedRegions;
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EFI_MM_REGISTER_MM_ENTRY RegisterMmEntry;
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};
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extern EFI_GUID gEfiMmConfigurationProtocolGuid;
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#endif
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