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120 lines
5.1 KiB
C
120 lines
5.1 KiB
C
/** @file
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The internal header file that declared a data structure that is shared
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between the SMM IPL and the SMM Core.
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Copyright (c) 2009 - 2018, 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 _PI_SMM_CORE_PRIVATE_DATA_H_
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#define _PI_SMM_CORE_PRIVATE_DATA_H_
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///
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/// Define values for the communications buffer used when gEfiEventDxeDispatchGuid is
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/// event signaled. This event is signaled by the DXE Core each time the DXE Core
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/// dispatcher has completed its work. When this event is signaled, the SMM Core
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/// if notified, so the SMM Core can dispatch SMM drivers. If COMM_BUFFER_SMM_DISPATCH_ERROR
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/// is returned in the communication buffer, then an error occurred dispatching SMM
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/// Drivers. If COMM_BUFFER_SMM_DISPATCH_SUCCESS is returned, then the SMM Core
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/// dispatched all the drivers it could. If COMM_BUFFER_SMM_DISPATCH_RESTART is
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/// returned, then the SMM Core just dispatched the SMM Driver that registered
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/// the SMM Entry Point enabling the use of SMM Mode. In this case, the SMM Core
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/// should be notified again to dispatch more SMM Drivers using SMM Mode.
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///
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#define COMM_BUFFER_SMM_DISPATCH_ERROR 0x00
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#define COMM_BUFFER_SMM_DISPATCH_SUCCESS 0x01
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#define COMM_BUFFER_SMM_DISPATCH_RESTART 0x02
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///
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/// Signature for the private structure shared between the SMM IPL and the SMM Core
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///
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#define SMM_CORE_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('s', 'm', 'm', 'c')
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///
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/// Private structure that is used to share information between the SMM IPL and
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/// the SMM Core. This structure is allocated from memory of type EfiRuntimeServicesData.
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/// Since runtime memory types are converted to available memory when a legacy boot
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/// is performed, the SMM Core must not access any fields of this structure if a legacy
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/// boot is performed. As a result, the SMM IPL must create an event notification
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/// for the Legacy Boot event and notify the SMM Core that a legacy boot is being
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/// performed. The SMM Core can then use this information to filter accesses to
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/// thos structure.
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///
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typedef struct {
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UINTN Signature;
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///
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/// The ImageHandle passed into the entry point of the SMM IPL. This ImageHandle
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/// is used by the SMM Core to fill in the ParentImageHandle field of the Loaded
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/// Image Protocol for each SMM Driver that is dispatched by the SMM Core.
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///
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EFI_HANDLE SmmIplImageHandle;
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///
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/// The number of SMRAM ranges passed from the SMM IPL to the SMM Core. The SMM
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/// Core uses these ranges of SMRAM to initialize the SMM Core memory manager.
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///
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UINTN SmramRangeCount;
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///
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/// A table of SMRAM ranges passed from the SMM IPL to the SMM Core. The SMM
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/// Core uses these ranges of SMRAM to initialize the SMM Core memory manager.
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///
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EFI_SMRAM_DESCRIPTOR *SmramRanges;
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///
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/// The SMM Foundation Entry Point. The SMM Core fills in this field when the
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/// SMM Core is initialized. The SMM IPL is responsbile for registering this entry
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/// point with the SMM Configuration Protocol. The SMM Configuration Protocol may
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/// not be available at the time the SMM IPL and SMM Core are started, so the SMM IPL
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/// sets up a protocol notification on the SMM Configuration Protocol and registers
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/// the SMM Foundation Entry Point as soon as the SMM Configuration Protocol is
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/// available.
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///
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EFI_SMM_ENTRY_POINT SmmEntryPoint;
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///
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/// Boolean flag set to TRUE while an SMI is being processed by the SMM Core.
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///
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BOOLEAN SmmEntryPointRegistered;
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///
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/// Boolean flag set to TRUE while an SMI is being processed by the SMM Core.
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///
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BOOLEAN InSmm;
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///
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/// This field is set by the SMM Core then the SMM Core is initialized. This field is
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/// used by the SMM Base 2 Protocol and SMM Communication Protocol implementations in
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/// the SMM IPL.
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///
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EFI_SMM_SYSTEM_TABLE2 *Smst;
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///
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/// This field is used by the SMM Communicatioon Protocol to pass a buffer into
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/// a software SMI handler and for the software SMI handler to pass a buffer back to
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/// the caller of the SMM Communication Protocol.
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///
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VOID *CommunicationBuffer;
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///
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/// This field is used by the SMM Communicatioon Protocol to pass the size of a buffer,
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/// in bytes, into a software SMI handler and for the software SMI handler to pass the
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/// size, in bytes, of a buffer back to the caller of the SMM Communication Protocol.
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///
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UINTN BufferSize;
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///
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/// This field is used by the SMM Communication Protocol to pass the return status from
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/// a software SMI handler back to the caller of the SMM Communication Protocol.
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///
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EFI_STATUS ReturnStatus;
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EFI_PHYSICAL_ADDRESS PiSmmCoreImageBase;
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UINT64 PiSmmCoreImageSize;
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EFI_PHYSICAL_ADDRESS PiSmmCoreEntryPoint;
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} SMM_CORE_PRIVATE_DATA;
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#endif
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