/** @file
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Functions shared between driver instances.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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Copyright (c) Microsoft Corporation.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiMm.h>
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#include <Library/BoardAcpiEnableLib.h>
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#include <Library/DebugLib.h>
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#include <Library/MmServicesTableLib.h>
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#include <Library/PcdLib.h>
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#include <Protocol/SmmSwDispatch2.h>
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#include "AcpiMm.h"
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/**
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Enable SCI
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@param[in] DispatchHandle - The handle of this callback, obtained when registering
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@param[in] DispatchContext - Pointer to the EFI_SMM_SW_DISPATCH_CONTEXT
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@param[in] CommBuffer - A pointer to a collection of data in memory that will
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be conveyed from a non-SMM environment into an SMM environment.
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@param[in] CommBufferSize - The size of the CommBuffer.
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**/
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EFI_STATUS
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EFIAPI
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EnableAcpiCallback (
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IN EFI_HANDLE DispatchHandle,
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IN CONST VOID *DispatchContext,
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IN OUT VOID *CommBuffer OPTIONAL,
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IN OUT UINTN *CommBufferSize OPTIONAL
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)
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{
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BoardEnableAcpi (TRUE);
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return EFI_SUCCESS;
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}
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/**
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Disable SCI
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@param[in] DispatchHandle - The handle of this callback, obtained when registering
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@param[in] DispatchContext - Pointer to the EFI_SMM_SW_DISPATCH_CONTEXT
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@param[in] CommBuffer - A pointer to a collection of data in memory that will
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be conveyed from a non-SMM environment into an SMM environment.
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@param[in] CommBufferSize - The size of the CommBuffer.
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**/
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EFI_STATUS
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EFIAPI
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DisableAcpiCallback (
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IN EFI_HANDLE DispatchHandle,
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IN CONST VOID *DispatchContext,
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IN OUT VOID *CommBuffer OPTIONAL,
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IN UINTN *CommBufferSize OPTIONAL
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)
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{
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BoardDisableAcpi (TRUE);
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return EFI_SUCCESS;
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}
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/**
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ACPI initialization logic shared between the Traditional MM and
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Standalone MM driver instances.
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**/
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VOID
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InitializeAcpiMm (
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VOID
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE SwHandle;
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EFI_SMM_SW_DISPATCH2_PROTOCOL *SwDispatch;
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EFI_SMM_SW_REGISTER_CONTEXT SwContext;
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//
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// Locate the ICH SMM SW dispatch protocol
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//
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Status = gMmst->MmLocateProtocol (&gEfiSmmSwDispatch2ProtocolGuid, NULL, (VOID**) &SwDispatch);
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ASSERT_EFI_ERROR (Status);
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//
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// Register ACPI enable SMI handler
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//
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SwContext.SwSmiInputValue = (UINTN) PcdGet8 (PcdAcpiEnableSwSmi);
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Status = SwDispatch->Register (
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SwDispatch,
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EnableAcpiCallback,
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&SwContext,
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&SwHandle
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Register ACPI disable SMI handler
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//
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SwContext.SwSmiInputValue = (UINTN) PcdGet8 (PcdAcpiDisableSwSmi);
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Status = SwDispatch->Register (
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SwDispatch,
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DisableAcpiCallback,
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&SwContext,
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&SwHandle
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);
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ASSERT_EFI_ERROR (Status);
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}
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