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/** @file
SMM STM support
Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _SMM_STM_H_
#define _SMM_STM_H_
#include <Protocol/SmMonitorInit.h>
/**
Create 4G page table for STM.
2M PAE page table in X64 version.
@param PageTableBase The page table base in MSEG
**/
VOID
StmGen4GPageTable (
IN UINTN PageTableBase
);
/**
This is SMM exception handle.
Consumed by STM when exception happen.
@param Context STM protection exception stack frame
@return the EBX value for STM reference.
EBX = 0: resume SMM guest using register state found on exception stack.
EBX = 1 to 0x0F: EBX contains a BIOS error code which the STM must record in the
TXT.ERRORCODE register and subsequently reset the system via
TXT.CMD.SYS_RESET. The value of the TXT.ERRORCODE register is calculated as
follows: TXT.ERRORCODE = (EBX & 0x0F) | STM_CRASH_BIOS_PANIC
EBX = 0x10 to 0xFFFFFFFF - reserved, do not use.
**/
UINT32
EFIAPI
SmmStmExceptionHandler (
IN OUT STM_PROTECTION_EXCEPTION_STACK_FRAME Context
);
/**
Get STM state.
@return STM state
**/
EFI_SM_MONITOR_STATE
EFIAPI
GetMonitorState (
VOID
);
/**
Load STM image to MSEG.
@param StmImage STM image
@param StmImageSize STM image size
@retval EFI_SUCCESS Load STM to MSEG successfully
@retval EFI_BUFFER_TOO_SMALL MSEG is smaller than minimal requirement of STM image
**/
EFI_STATUS
EFIAPI
LoadMonitor (
IN EFI_PHYSICAL_ADDRESS StmImage,
IN UINTN StmImageSize
);
/**
Add resources in list to database. Allocate new memory areas as needed.
@param ResourceList A pointer to resource list to be added
@param NumEntries Optional number of entries.
If 0, list must be terminated by END_OF_RESOURCES.
@retval EFI_SUCCESS If resources are added
@retval EFI_INVALID_PARAMETER If nested procedure detected resource failer
@retval EFI_OUT_OF_RESOURCES If nested procedure returned it and we cannot allocate more areas.
**/
EFI_STATUS
EFIAPI
AddPiResource (
IN STM_RSC *ResourceList,
IN UINT32 NumEntries OPTIONAL
);
/**
Delete resources in list to database.
@param ResourceList A pointer to resource list to be deleted
NULL means delete all resources.
@param NumEntries Optional number of entries.
If 0, list must be terminated by END_OF_RESOURCES.
@retval EFI_SUCCESS If resources are deleted
@retval EFI_INVALID_PARAMETER If nested procedure detected resource failer
**/
EFI_STATUS
EFIAPI
DeletePiResource (
IN STM_RSC *ResourceList,
IN UINT32 NumEntries OPTIONAL
);
/**
Get BIOS resources.
@param ResourceList A pointer to resource list to be filled
@param ResourceSize On input it means size of resource list input.
On output it means size of resource list filled,
or the size of resource list to be filled if size of too small.
@retval EFI_SUCCESS If resources are returned.
@retval EFI_BUFFER_TOO_SMALL If resource list buffer is too small to hold the whole resources.
**/
EFI_STATUS
EFIAPI
GetPiResource (
OUT STM_RSC *ResourceList,
IN OUT UINT32 *ResourceSize
);
/**
This function initialize STM configuration table.
**/
VOID
StmSmmConfigurationTableInit (
VOID
);
/**
This function notify STM resource change.
@param StmResource BIOS STM resource
**/
VOID
NotifyStmResourceChange (
IN VOID *StmResource
);
/**
This function return BIOS STM resource.
@return BIOS STM resource
**/
VOID *
GetStmResource (
VOID
);
/**
This function fixes up the address of the global variable or function
referred in SmiEntry assembly files to be the absolute address.
**/
VOID
EFIAPI
SmmCpuFeaturesLibStmSmiEntryFixupAddress (
);
#endif
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