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/** @file
This DXE driver configures and supports Dptf.
@copyright
Copyright (c) 2013 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.
This file contains an 'Intel Peripheral Driver' and uniquely
identified as "Intel Reference Module" and is
licensed for Intel CPUs and chipsets under the terms of your
license agreement with Intel or your vendor. This file may
be modified by the user, subject to additional terms of the
license agreement
**/
#include "Dptf.h"
ACPI_PLATFORM_POLICY_PROTOCOL *mAcpiPlatformPolicyProtocol;
EFI_RUNTIME_SERVICES *gRT;
///
/// Driver entry point
///
EFI_DRIVER_ENTRY_POINT (InitializeDptf)
EFI_STATUS
InitializeDptf (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
/**
@brief
This procedure does all the DPTF initialization and loads the ACPI tables.
@param[in] ImageHandle - The firmware allocated handle to the Driver Image
@param[in] SystemTable - Pointer to the EFI System Table
@retval EFI_SUCCESS - The driver installed/initialized correctly.
**/
{
EFI_STATUS Status;
gRT = SystemTable->RuntimeServices;
///
/// Initialize the EFI Runtime Library
///
DxeInitializeDriverLib (ImageHandle, SystemTable);
///
/// S3 boot script
///
INITIALIZE_SCRIPT (ImageHandle, SystemTable);
///
/// Locate platform configuration information and copy it to a global variable.
///
Status = gBS->LocateProtocol (
&gAcpiPlatformPolicyProtocolGuid,
NULL,
(VOID**) &mAcpiPlatformPolicyProtocol
);
if (EFI_ERROR(Status)) {
DEBUG ((EFI_D_ERROR, "No ACPI Platform Policy Protocol available."));
} else {
DEBUG ((EFI_D_INFO, "ACPI Platform Policy Protocol is loaded."));
}
ASSERT_EFI_ERROR(Status);
///
/// Check if Dptf is enabled and load the ACPI SSDT.
///
if (mAcpiPlatformPolicyProtocol->EnableDptf == 1) {
///
/// Load the SSDT ACPI Tables.
///
switch (mAcpiPlatformPolicyProtocol->BoardId) {
case 0x30: // BoardId for Ffrd
LoadAcpiTablesFfrd ();
break;
default:
LoadAcpiTables ();
}
}
return EFI_SUCCESS;
}
VOID
LoadAcpiTables(
VOID
)
/**
@brief
This procedure loads the ACPI SSDT tables.
@param[in] None
@retval None
**/
{
EFI_STATUS Status;
EFI_HANDLE *HandleBuffer;
UINTN NumberOfHandles;
UINTN Index;
EFI_FIRMWARE_VOLUME_PROTOCOL *FwVol;
EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
INTN Instance;
EFI_ACPI_COMMON_HEADER *Table;
UINTN Size;
EFI_FV_FILETYPE FileType;
EFI_FV_FILE_ATTRIBUTES Attributes;
UINT32 FvStatus;
EFI_ACPI_DESCRIPTION_HEADER *TableHeader;
UINTN TableHandle;
EFI_ACPI_TABLE_VERSION Version;
BOOLEAN LoadTable;
FwVol = NULL;
Table = NULL;
///
/// Locate FV protocol.
///
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiFirmwareVolumeProtocolGuid,
NULL,
&NumberOfHandles,
&HandleBuffer
);
ASSERT_EFI_ERROR (Status);
///
/// Look for FV with ACPI storage file
///
for (Index = 0; Index < NumberOfHandles; Index++) {
///
/// Get the protocol on this handle
/// This should not fail because of LocateHandleBuffer
///
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiFirmwareVolumeProtocolGuid,
(VOID **) &FwVol
);
ASSERT_EFI_ERROR (Status);
if ((Status == EFI_SUCCESS) && (FwVol != NULL)) {
///
/// See if it has the ACPI storage file
///
Size = 0;
FvStatus = 0;
Status = FwVol->ReadFile (
FwVol,
&gDptfAcpiTableStorageGuid,
NULL,
&Size,
&FileType,
&Attributes,
&FvStatus
);
///
/// If we found it, then we are done
///
if (Status == EFI_SUCCESS) {
break;
}
}
}
///
/// Our exit status is determined by the success of the previous operations
/// If the protocol was found, Instance already points to it.
///
/// Free any allocated buffers
///
FreePool (HandleBuffer);
///
/// Sanity check that we found our data file
///
ASSERT (FwVol);
if (FwVol == NULL) {
return;
}
///
/// By default, a table belongs in all ACPI table versions published.
///
Version = EFI_ACPI_TABLE_VERSION_1_0B | EFI_ACPI_TABLE_VERSION_2_0 | EFI_ACPI_TABLE_VERSION_3_0;
///
/// Find the Table protocol
///
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);
///
/// Read tables from the storage file.
///
Instance = 0;
while (Status == EFI_SUCCESS) {
///
/// Read the ACPI tables
///
Status = FwVol->ReadSection (
FwVol,
&gDptfAcpiTableStorageGuid,
EFI_SECTION_RAW,
Instance,
(VOID **) &Table,
&Size,
&FvStatus
);
if (!EFI_ERROR (Status)) {
LoadTable = FALSE;
TableHeader = (EFI_ACPI_DESCRIPTION_HEADER *) Table;
switch (((EFI_ACPI_DESCRIPTION_HEADER*) TableHeader)->OemTableId) {
case EFI_SIGNATURE_64 ('D', 'p', 't', 'f', 'T', 'a', 'b', 'l'):
///
/// This is Dptf SSDT. Dptf should be enabled if we reach here so load the table.
///
LoadTable = TRUE;
DEBUG ((EFI_D_INFO, "Found Dptf SSDT signature."));
break;
default:
break;
}
///
/// Add the table
///
if (LoadTable) {
TableHandle = 0;
Status = AcpiTable->InstallAcpiTable (
AcpiTable,
Table,
Table->Length,
&TableHandle
);
}
///
/// Increment the instance
///
Instance++;
Table = NULL;
}
}
}
VOID
LoadAcpiTablesFfrd(
VOID
)
/**
@brief
This procedure loads the ACPI SSDT tables.
@param[in] None
@retval None
**/
{
EFI_STATUS Status;
EFI_HANDLE *HandleBuffer;
UINTN NumberOfHandles;
UINTN Index;
EFI_FIRMWARE_VOLUME_PROTOCOL *FwVol;
EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
INTN Instance;
EFI_ACPI_COMMON_HEADER *Table;
UINTN Size;
EFI_FV_FILETYPE FileType;
EFI_FV_FILE_ATTRIBUTES Attributes;
UINT32 FvStatus;
EFI_ACPI_DESCRIPTION_HEADER *TableHeader;
UINTN TableHandle;
EFI_ACPI_TABLE_VERSION Version;
BOOLEAN LoadTable;
FwVol = NULL;
Table = NULL;
///
/// Locate FV protocol.
///
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiFirmwareVolumeProtocolGuid,
NULL,
&NumberOfHandles,
&HandleBuffer
);
ASSERT_EFI_ERROR (Status);
///
/// Look for FV with ACPI storage file
///
for (Index = 0; Index < NumberOfHandles; Index++) {
///
/// Get the protocol on this handle
/// This should not fail because of LocateHandleBuffer
///
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiFirmwareVolumeProtocolGuid,
(VOID **) &FwVol
);
ASSERT_EFI_ERROR (Status);
if ((Status == EFI_SUCCESS) && (FwVol != NULL)) {
///
/// See if it has the ACPI storage file
///
Size = 0;
FvStatus = 0;
Status = FwVol->ReadFile (
FwVol,
&gDptfAcpiTableStorageGuidFfrd,
NULL,
&Size,
&FileType,
&Attributes,
&FvStatus
);
///
/// If we found it, then we are done
///
if (Status == EFI_SUCCESS) {
break;
}
}
}
///
/// Our exit status is determined by the success of the previous operations
/// If the protocol was found, Instance already points to it.
///
/// Free any allocated buffers
///
FreePool (HandleBuffer);
///
/// Sanity check that we found our data file
///
ASSERT (FwVol);
if (FwVol == NULL) {
return;
}
///
/// By default, a table belongs in all ACPI table versions published.
///
Version = EFI_ACPI_TABLE_VERSION_1_0B | EFI_ACPI_TABLE_VERSION_2_0 | EFI_ACPI_TABLE_VERSION_3_0;
///
/// Find the Table protocol
///
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);
///
/// Read tables from the storage file.
///
Instance = 0;
while (Status == EFI_SUCCESS) {
///
/// Read the ACPI tables
///
Status = FwVol->ReadSection (
FwVol,
&gDptfAcpiTableStorageGuidFfrd,
EFI_SECTION_RAW,
Instance,
(VOID **) &Table,
&Size,
&FvStatus
);
if (!EFI_ERROR (Status)) {
LoadTable = FALSE;
TableHeader = (EFI_ACPI_DESCRIPTION_HEADER *) Table;
switch (((EFI_ACPI_DESCRIPTION_HEADER*) TableHeader)->OemTableId) {
case EFI_SIGNATURE_64 ('D', 'p', 't', 'f', 'F', 'f', 'r', 'd'):
///
/// This is Dptf SSDT. Dptf should be enabled if we reach here so load the table.
///
LoadTable = TRUE;
DEBUG ((EFI_D_INFO, "Found Dptf SSDT signature."));
break;
default:
break;
}
///
/// Add the table
///
if (LoadTable) {
TableHandle = 0;
Status = AcpiTable->InstallAcpiTable (
AcpiTable,
Table,
Table->Length,
&TableHandle
);
}
///
/// Increment the instance
///
Instance++;
Table = NULL;
}
}
}
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