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104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
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/** @file
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Public include file for the SMM CPU Platform Hook Library.
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Copyright (c) 2010 - 2015, 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 __SMM_CPU_PLATFORM_HOOK_LIB_H__
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#define __SMM_CPU_PLATFORM_HOOK_LIB_H__
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///
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/// SMM Page Size Type
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///
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typedef enum {
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SmmPageSize4K,
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SmmPageSize2M,
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SmmPageSize1G,
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MaxSmmPageSizeType
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} SMM_PAGE_SIZE_TYPE;
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/**
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Checks if platform produces a valid SMI.
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This function checks if platform produces a valid SMI. This function is
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called at SMM entry to detect if this is a spurious SMI. This function
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must be implemented in an MP safe way because it is called by multiple CPU
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threads.
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@retval TRUE There is a valid SMI
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@retval FALSE There is no valid SMI
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**/
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BOOLEAN
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EFIAPI
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PlatformValidSmi (
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VOID
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);
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/**
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Clears platform top level SMI status bit.
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This function clears platform top level SMI status bit.
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@retval TRUE The platform top level SMI status is cleared.
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@retval FALSE The platform top level SMI status cannot be cleared.
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**/
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BOOLEAN
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EFIAPI
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ClearTopLevelSmiStatus (
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VOID
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);
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/**
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Performs platform specific way of SMM BSP election.
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This function performs platform specific way of SMM BSP election.
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@param IsBsp Output parameter. TRUE: the CPU this function executes
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on is elected to be the SMM BSP. FALSE: the CPU this
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function executes on is to be SMM AP.
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@retval EFI_SUCCESS The function executes successfully.
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@retval EFI_NOT_READY The function does not determine whether this CPU should be
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BSP or AP. This may occur if hardware init sequence to
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enable the determination is yet to be done, or the function
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chooses not to do BSP election and will let SMM CPU driver to
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use its default BSP election process.
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@retval EFI_DEVICE_ERROR The function cannot determine whether this CPU should be
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BSP or AP due to hardware error.
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**/
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EFI_STATUS
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EFIAPI
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PlatformSmmBspElection (
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OUT BOOLEAN *IsBsp
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);
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/**
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Get platform page table attribute .
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This function gets page table attribute of platform.
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@param Address Input parameter. Obtain the page table entries attribute on this address.
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@param PageSize Output parameter. The size of the page.
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@param NumOfPages Output parameter. Number of page.
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@param PageAttribute Output parameter. Paging Attributes (WB, UC, etc).
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@retval EFI_SUCCESS The platform page table attribute from the address is determined.
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@retval EFI_UNSUPPORTED The platform does not support getting page table attribute for the address.
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**/
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EFI_STATUS
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EFIAPI
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GetPlatformPageTableAttribute (
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IN UINT64 Address,
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OUT SMM_PAGE_SIZE_TYPE *PageSize,
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OUT UINTN *NumOfPages,
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OUT UINTN *PageAttribute
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);
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#endif
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