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system76-edk2/MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableProtocol.c
Michael D Kinney 9d510e61fc MdeModulePkg: Replace BSD License with BSD+Patent License 
https://bugzilla.tianocore.org/show_bug.cgi?id=1373

Replace BSD 2-Clause License with BSD+Patent License.  This change is
based on the following emails:

  https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html
  https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html

RFCs with detailed process for the license change:

  V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html
  V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html
  V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
2019-04-09 10:58:08 -07:00

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/** @file
ACPI Table Protocol Implementation
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
//
// Includes
//
#include "AcpiTable.h"
//
// The maximum number of tables that pre-allocated.
//
UINTN mEfiAcpiMaxNumTables = EFI_ACPI_MAX_NUM_TABLES;
//
// Allocation strategy to use for AllocatePages ().
// Runtime value depends on PcdExposedAcpiTableVersions.
//
STATIC EFI_ALLOCATE_TYPE mAcpiTableAllocType;
/**
This function adds an ACPI table to the table list. It will detect FACS and
allocate the correct type of memory and properly align the table.
@param AcpiTableInstance Instance of the protocol.
@param Table Table to add.
@param Checksum Does the table require checksumming.
@param Version The version of the list to add the table to.
@param Handle Pointer for returning the handle.
@return EFI_SUCCESS The function completed successfully.
@return EFI_OUT_OF_RESOURCES Could not allocate a required resource.
@return EFI_ABORTED The table is a duplicate of a table that is required
to be unique.
**/
EFI_STATUS
AddTableToList (
IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance,
IN VOID *Table,
IN BOOLEAN Checksum,
IN EFI_ACPI_TABLE_VERSION Version,
OUT UINTN *Handle
);
/**
This function finds and removes the table specified by the handle.
@param AcpiTableInstance Instance of the protocol.
@param Version Bitmask of which versions to remove.
@param Handle Table to remove.
@return EFI_SUCCESS The function completed successfully.
@return EFI_ABORTED An error occurred.
@return EFI_NOT_FOUND Handle not found in table list.
**/
EFI_STATUS
RemoveTableFromList (
IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance,
IN EFI_ACPI_TABLE_VERSION Version,
IN UINTN Handle
);
/**
This function calculates and updates an UINT8 checksum.
@param Buffer Pointer to buffer to checksum
@param Size Number of bytes to checksum
@param ChecksumOffset Offset to place the checksum result in
@return EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
AcpiPlatformChecksum (
IN VOID *Buffer,
IN UINTN Size,
IN UINTN ChecksumOffset
);
/**
Checksum all versions of the common tables, RSDP, RSDT, XSDT.
@param AcpiTableInstance Protocol instance private data.
@return EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
ChecksumCommonTables (
IN OUT EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance
);
//
// Protocol function implementations.
//
/**
This function publishes the specified versions of the ACPI tables by
installing EFI configuration table entries for them. Any combination of
table versions can be published.
@param AcpiTableInstance Instance of the protocol.
@param Version Version(s) to publish.
@return EFI_SUCCESS The function completed successfully.
@return EFI_ABORTED The function could not complete successfully.
**/
EFI_STATUS
EFIAPI
PublishTables (
IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance,
IN EFI_ACPI_TABLE_VERSION Version
)
{
EFI_STATUS Status;
UINT32 *CurrentRsdtEntry;
VOID *CurrentXsdtEntry;
UINT64 Buffer64;
//
// Reorder tables as some operating systems don't seem to find the
// FADT correctly if it is not in the first few entries
//
//
// Add FADT as the first entry
//
if ((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
CurrentRsdtEntry = (UINT32 *) ((UINT8 *) AcpiTableInstance->Rsdt1 + sizeof (EFI_ACPI_DESCRIPTION_HEADER));
*CurrentRsdtEntry = (UINT32) (UINTN) AcpiTableInstance->Fadt1;
CurrentRsdtEntry = (UINT32 *) ((UINT8 *) AcpiTableInstance->Rsdt3 + sizeof (EFI_ACPI_DESCRIPTION_HEADER));
*CurrentRsdtEntry = (UINT32) (UINTN) AcpiTableInstance->Fadt3;
}
if ((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) {
CurrentXsdtEntry = (VOID *) ((UINT8 *) AcpiTableInstance->Xsdt + sizeof (EFI_ACPI_DESCRIPTION_HEADER));
//
// Add entry to XSDT, XSDT expects 64 bit pointers, but
// the table pointers in XSDT are not aligned on 8 byte boundary.
//
Buffer64 = (UINT64) (UINTN) AcpiTableInstance->Fadt3;
CopyMem (
CurrentXsdtEntry,
&Buffer64,
sizeof (UINT64)
);
}
//
// Do checksum again because Dsdt/Xsdt is updated.
//
ChecksumCommonTables (AcpiTableInstance);
//
// Add the RSD_PTR to the system table and store that we have installed the
// tables.
//
if ((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
Status = gBS->InstallConfigurationTable (&gEfiAcpi10TableGuid, AcpiTableInstance->Rsdp1);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
}
if ((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) {
Status = gBS->InstallConfigurationTable (&gEfiAcpiTableGuid, AcpiTableInstance->Rsdp3);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
}
return EFI_SUCCESS;
}
/**
Installs an ACPI table into the RSDT/XSDT.
Note that the ACPI table should be checksumed before installing it.
Otherwise it will assert.
@param This Protocol instance pointer.
@param AcpiTableBuffer A pointer to a buffer containing the ACPI table to be installed.
@param AcpiTableBufferSize Specifies the size, in bytes, of the AcpiTableBuffer buffer.
@param TableKey Reurns a key to refer to the ACPI table.
@return EFI_SUCCESS The table was successfully inserted.
@return EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL, TableKey is NULL, or AcpiTableBufferSize
and the size field embedded in the ACPI table pointed to by AcpiTableBuffer
are not in sync.
@return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete the request.
@retval EFI_ACCESS_DENIED The table signature matches a table already
present in the system and platform policy
does not allow duplicate tables of this type.
**/
EFI_STATUS
EFIAPI
InstallAcpiTable (
IN EFI_ACPI_TABLE_PROTOCOL *This,
IN VOID *AcpiTableBuffer,
IN UINTN AcpiTableBufferSize,
OUT UINTN *TableKey
)
{
EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;
EFI_STATUS Status;
VOID *AcpiTableBufferConst;
EFI_ACPI_TABLE_VERSION Version;
//
// Check for invalid input parameters
//
if ((AcpiTableBuffer == NULL) || (TableKey == NULL)
|| (((EFI_ACPI_DESCRIPTION_HEADER *) AcpiTableBuffer)->Length != AcpiTableBufferSize)) {
return EFI_INVALID_PARAMETER;
}
Version = PcdGet32 (PcdAcpiExposedTableVersions);
//
// Get the instance of the ACPI table protocol
//
AcpiTableInstance = EFI_ACPI_TABLE_INSTANCE_FROM_THIS (This);
//
// Install the ACPI table
//
AcpiTableBufferConst = AllocateCopyPool (AcpiTableBufferSize,AcpiTableBuffer);
*TableKey = 0;
Status = AddTableToList (
AcpiTableInstance,
AcpiTableBufferConst,
TRUE,
Version,
TableKey
);
if (!EFI_ERROR (Status)) {
Status = PublishTables (
AcpiTableInstance,
Version
);
}
FreePool (AcpiTableBufferConst);
//
// Add a new table successfully, notify registed callback
//
if (FeaturePcdGet (PcdInstallAcpiSdtProtocol)) {
if (!EFI_ERROR (Status)) {
SdtNotifyAcpiList (
AcpiTableInstance,
Version,
*TableKey
);
}
}
return Status;
}
/**
Removes an ACPI table from the RSDT/XSDT.
@param This Protocol instance pointer.
@param TableKey Specifies the table to uninstall. The key was returned from InstallAcpiTable().
@return EFI_SUCCESS The table was successfully uninstalled.
@return EFI_NOT_FOUND TableKey does not refer to a valid key for a table entry.
**/
EFI_STATUS
EFIAPI
UninstallAcpiTable (
IN EFI_ACPI_TABLE_PROTOCOL *This,
IN UINTN TableKey
)
{
EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance;
EFI_STATUS Status;
EFI_ACPI_TABLE_VERSION Version;
//
// Get the instance of the ACPI table protocol
//
AcpiTableInstance = EFI_ACPI_TABLE_INSTANCE_FROM_THIS (This);
Version = PcdGet32 (PcdAcpiExposedTableVersions);
//
// Uninstall the ACPI table
//
Status = RemoveTableFromList (
AcpiTableInstance,
Version,
TableKey
);
if (!EFI_ERROR (Status)) {
Status = PublishTables (
AcpiTableInstance,
Version
);
}
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
} else {
return EFI_SUCCESS;
}
}
/**
If the number of APCI tables exceeds the preallocated max table number, enlarge the table buffer.
@param AcpiTableInstance ACPI table protocol instance data structure.
@return EFI_SUCCESS reallocate the table beffer successfully.
@return EFI_OUT_OF_RESOURCES Unable to allocate required resources.
**/
EFI_STATUS
ReallocateAcpiTableBuffer (
IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance
)
{
UINTN NewMaxTableNumber;
UINTN TotalSize;
UINT8 *Pointer;
EFI_PHYSICAL_ADDRESS PageAddress;
EFI_ACPI_TABLE_INSTANCE TempPrivateData;
EFI_STATUS Status;
UINT64 CurrentData;
CopyMem (&TempPrivateData, AcpiTableInstance, sizeof (EFI_ACPI_TABLE_INSTANCE));
//
// Enlarge the max table number from mEfiAcpiMaxNumTables to mEfiAcpiMaxNumTables + EFI_ACPI_MAX_NUM_TABLES
//
NewMaxTableNumber = mEfiAcpiMaxNumTables + EFI_ACPI_MAX_NUM_TABLES;
//
// Create RSDT, XSDT structures and allocate buffers.
//
TotalSize = sizeof (EFI_ACPI_DESCRIPTION_HEADER) + // for ACPI 2.0/3.0 XSDT
NewMaxTableNumber * sizeof (UINT64);
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
TotalSize += sizeof (EFI_ACPI_DESCRIPTION_HEADER) + // for ACPI 1.0 RSDT
NewMaxTableNumber * sizeof (UINT32) +
sizeof (EFI_ACPI_DESCRIPTION_HEADER) + // for ACPI 2.0/3.0 RSDT
NewMaxTableNumber * sizeof (UINT32);
}
//
// Allocate memory in the lower 32 bit of address range for
// compatibility with ACPI 1.0 OS.
//
// This is done because ACPI 1.0 pointers are 32 bit values.
// ACPI 2.0 OS and all 64 bit OS must use the 64 bit ACPI table addresses.
// There is no architectural reason these should be below 4GB, it is purely
// for convenience of implementation that we force memory below 4GB.
//
PageAddress = 0xFFFFFFFF;
Status = gBS->AllocatePages (
mAcpiTableAllocType,
EfiACPIReclaimMemory,
EFI_SIZE_TO_PAGES (TotalSize),
&PageAddress
);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
Pointer = (UINT8 *) (UINTN) PageAddress;
ZeroMem (Pointer, TotalSize);
AcpiTableInstance->Rsdt1 = (EFI_ACPI_DESCRIPTION_HEADER *) Pointer;
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
Pointer += (sizeof (EFI_ACPI_DESCRIPTION_HEADER) + NewMaxTableNumber * sizeof (UINT32));
AcpiTableInstance->Rsdt3 = (EFI_ACPI_DESCRIPTION_HEADER *) Pointer;
Pointer += (sizeof (EFI_ACPI_DESCRIPTION_HEADER) + NewMaxTableNumber * sizeof (UINT32));
}
AcpiTableInstance->Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) Pointer;
//
// Update RSDP to point to the new Rsdt and Xsdt address.
//
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
AcpiTableInstance->Rsdp1->RsdtAddress = (UINT32) (UINTN) AcpiTableInstance->Rsdt1;
AcpiTableInstance->Rsdp3->RsdtAddress = (UINT32) (UINTN) AcpiTableInstance->Rsdt3;
}
CurrentData = (UINT64) (UINTN) AcpiTableInstance->Xsdt;
CopyMem (&AcpiTableInstance->Rsdp3->XsdtAddress, &CurrentData, sizeof (UINT64));
//
// copy the original Rsdt1, Rsdt3 and Xsdt structure to new buffer
//
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
CopyMem (AcpiTableInstance->Rsdt1, TempPrivateData.Rsdt1, (sizeof (EFI_ACPI_DESCRIPTION_HEADER) + mEfiAcpiMaxNumTables * sizeof (UINT32)));
CopyMem (AcpiTableInstance->Rsdt3, TempPrivateData.Rsdt3, (sizeof (EFI_ACPI_DESCRIPTION_HEADER) + mEfiAcpiMaxNumTables * sizeof (UINT32)));
}
CopyMem (AcpiTableInstance->Xsdt, TempPrivateData.Xsdt, (sizeof (EFI_ACPI_DESCRIPTION_HEADER) + mEfiAcpiMaxNumTables * sizeof (UINT64)));
//
// Calculate orignal ACPI table buffer size
//
TotalSize = sizeof (EFI_ACPI_DESCRIPTION_HEADER) + // for ACPI 2.0/3.0 XSDT
mEfiAcpiMaxNumTables * sizeof (UINT64);
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
TotalSize += sizeof (EFI_ACPI_DESCRIPTION_HEADER) + // for ACPI 1.0 RSDT
mEfiAcpiMaxNumTables * sizeof (UINT32) +
sizeof (EFI_ACPI_DESCRIPTION_HEADER) + // for ACPI 2.0/3.0 RSDT
mEfiAcpiMaxNumTables * sizeof (UINT32);
}
gBS->FreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)TempPrivateData.Rsdt1, EFI_SIZE_TO_PAGES (TotalSize));
//
// Update the Max ACPI table number
//
mEfiAcpiMaxNumTables = NewMaxTableNumber;
return EFI_SUCCESS;
}
/**
This function adds an ACPI table to the table list. It will detect FACS and
allocate the correct type of memory and properly align the table.
@param AcpiTableInstance Instance of the protocol.
@param Table Table to add.
@param Checksum Does the table require checksumming.
@param Version The version of the list to add the table to.
@param Handle Pointer for returning the handle.
@return EFI_SUCCESS The function completed successfully.
@return EFI_OUT_OF_RESOURCES Could not allocate a required resource.
@retval EFI_ACCESS_DENIED The table signature matches a table already
present in the system and platform policy
does not allow duplicate tables of this type.
**/
EFI_STATUS
AddTableToList (
IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance,
IN VOID *Table,
IN BOOLEAN Checksum,
IN EFI_ACPI_TABLE_VERSION Version,
OUT UINTN *Handle
)
{
EFI_STATUS Status;
EFI_ACPI_TABLE_LIST *CurrentTableList;
UINT32 CurrentTableSignature;
UINT32 CurrentTableSize;
UINT32 *CurrentRsdtEntry;
VOID *CurrentXsdtEntry;
UINT64 Buffer64;
BOOLEAN AddToRsdt;
//
// Check for invalid input parameters
//
ASSERT (AcpiTableInstance);
ASSERT (Table);
ASSERT (Handle);
//
// Init locals
//
AddToRsdt = TRUE;
//
// Create a new list entry
//
CurrentTableList = AllocatePool (sizeof (EFI_ACPI_TABLE_LIST));
ASSERT (CurrentTableList);
//
// Determine table type and size
//
CurrentTableSignature = ((EFI_ACPI_COMMON_HEADER *) Table)->Signature;
CurrentTableSize = ((EFI_ACPI_COMMON_HEADER *) Table)->Length;
//
// Allocate a buffer for the table. All tables are allocated in the lower 32 bits of address space
// for backwards compatibility with ACPI 1.0 OS.
//
// This is done because ACPI 1.0 pointers are 32 bit values.
// ACPI 2.0 OS and all 64 bit OS must use the 64 bit ACPI table addresses.
// There is no architectural reason these should be below 4GB, it is purely
// for convenience of implementation that we force memory below 4GB.
//
CurrentTableList->PageAddress = 0xFFFFFFFF;
CurrentTableList->NumberOfPages = EFI_SIZE_TO_PAGES (CurrentTableSize);
//
// Allocation memory type depends on the type of the table
//
if ((CurrentTableSignature == EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE_SIGNATURE) ||
(CurrentTableSignature == EFI_ACPI_4_0_UEFI_ACPI_DATA_TABLE_SIGNATURE)) {
//
// Allocate memory for the FACS. This structure must be aligned
// on a 64 byte boundary and must be ACPI NVS memory.
// Using AllocatePages should ensure that it is always aligned.
// Do not change signature for new ACPI version because they are same.
//
// UEFI table also need to be in ACPI NVS memory, because some data field
// could be updated by OS present agent. For example, BufferPtrAddress in
// SMM communication ACPI table.
//
ASSERT ((EFI_PAGE_SIZE % 64) == 0);
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiACPIMemoryNVS,
CurrentTableList->NumberOfPages,
&CurrentTableList->PageAddress
);
} else {
//
// All other tables are ACPI reclaim memory, no alignment requirements.
//
Status = gBS->AllocatePages (
mAcpiTableAllocType,
EfiACPIReclaimMemory,
CurrentTableList->NumberOfPages,
&CurrentTableList->PageAddress
);
}
//
// Check return value from memory alloc.
//
if (EFI_ERROR (Status)) {
gBS->FreePool (CurrentTableList);
return EFI_OUT_OF_RESOURCES;
}
//
// Update the table pointer with the allocated memory start
//
CurrentTableList->Table = (EFI_ACPI_COMMON_HEADER *) (UINTN) CurrentTableList->PageAddress;
//
// Initialize the table contents
//
CurrentTableList->Signature = EFI_ACPI_TABLE_LIST_SIGNATURE;
CopyMem (CurrentTableList->Table, Table, CurrentTableSize);
CurrentTableList->Handle = AcpiTableInstance->CurrentHandle++;
*Handle = CurrentTableList->Handle;
CurrentTableList->Version = Version;
//
// Update internal pointers if this is a required table. If it is a required
// table and a table of that type already exists, return an error.
//
// Calculate the checksum if the table is not FACS.
//
switch (CurrentTableSignature) {
case EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE:
//
// We don't add the FADT in the standard way because some
// OS expect the FADT to be early in the table list.
// So we always add it as the first element in the list.
//
AddToRsdt = FALSE;
//
// Check that the table has not been previously added.
//
if (((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0 && AcpiTableInstance->Fadt1 != NULL) ||
((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0 && AcpiTableInstance->Fadt3 != NULL)
) {
gBS->FreePages (CurrentTableList->PageAddress, CurrentTableList->NumberOfPages);
gBS->FreePool (CurrentTableList);
return EFI_ACCESS_DENIED;
}
//
// Add the table to the appropriate table version
//
if ((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
//
// Save a pointer to the table
//
AcpiTableInstance->Fadt1 = (EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *) CurrentTableList->Table;
//
// Update pointers in FADT. If tables don't exist this will put NULL pointers there.
//
AcpiTableInstance->Fadt1->FirmwareCtrl = (UINT32) (UINTN) AcpiTableInstance->Facs1;
AcpiTableInstance->Fadt1->Dsdt = (UINT32) (UINTN) AcpiTableInstance->Dsdt1;
//
// RSDP OEM information is updated to match the FADT OEM information
//
CopyMem (
&AcpiTableInstance->Rsdp1->OemId,
&AcpiTableInstance->Fadt1->Header.OemId,
6
);
//
// RSDT OEM information is updated to match the FADT OEM information.
//
CopyMem (
&AcpiTableInstance->Rsdt1->OemId,
&AcpiTableInstance->Fadt1->Header.OemId,
6
);
CopyMem (
&AcpiTableInstance->Rsdt1->OemTableId,
&AcpiTableInstance->Fadt1->Header.OemTableId,
sizeof (UINT64)
);
AcpiTableInstance->Rsdt1->OemRevision = AcpiTableInstance->Fadt1->Header.OemRevision;
}
if ((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) {
//
// Save a pointer to the table
//
AcpiTableInstance->Fadt3 = (EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE *) CurrentTableList->Table;
//
// Update pointers in FADT. If tables don't exist this will put NULL pointers there.
// Note: If the FIRMWARE_CTRL is non-zero, then X_FIRMWARE_CTRL must be zero, and
// vice-versa.
//
if ((UINT64)(UINTN)AcpiTableInstance->Facs3 < BASE_4GB) {
AcpiTableInstance->Fadt3->FirmwareCtrl = (UINT32) (UINTN) AcpiTableInstance->Facs3;
ZeroMem (&AcpiTableInstance->Fadt3->XFirmwareCtrl, sizeof (UINT64));
} else {
Buffer64 = (UINT64) (UINTN) AcpiTableInstance->Facs3;
CopyMem (
&AcpiTableInstance->Fadt3->XFirmwareCtrl,
&Buffer64,
sizeof (UINT64)
);
AcpiTableInstance->Fadt3->FirmwareCtrl = 0;
}
if ((UINT64)(UINTN)AcpiTableInstance->Dsdt3 < BASE_4GB) {
AcpiTableInstance->Fadt3->Dsdt = (UINT32) (UINTN) AcpiTableInstance->Dsdt3;
//
// Comment block "the caller installs the tables in "DSDT, FADT" order"
// The below comments are also in "the caller installs the tables in "FADT, DSDT" order" comment block.
//
// The ACPI specification, up to and including revision 5.1 Errata A,
// allows the DSDT and X_DSDT fields to be both set in the FADT.
// (Obviously, this only makes sense if the DSDT address is representable in 4 bytes.)
// Starting with 5.1 Errata B, specifically for Mantis 1393 <https://mantis.uefi.org/mantis/view.php?id=1393>,
// the spec requires at most one of DSDT and X_DSDT fields to be set to a nonzero value,
// but strangely an exception is 6.0 that has no this requirement.
//
// Here we do not make the DSDT and X_DSDT fields mutual exclusion conditionally
// by checking FADT revision, but always set both DSDT and X_DSDT fields in the FADT
// to have better compatibility as some OS may have assumption to only consume X_DSDT
// field even the DSDT address is < 4G.
//
Buffer64 = AcpiTableInstance->Fadt3->Dsdt;
} else {
AcpiTableInstance->Fadt3->Dsdt = 0;
Buffer64 = (UINT64) (UINTN) AcpiTableInstance->Dsdt3;
}
CopyMem (&AcpiTableInstance->Fadt3->XDsdt, &Buffer64, sizeof (UINT64));
//
// RSDP OEM information is updated to match the FADT OEM information
//
CopyMem (
&AcpiTableInstance->Rsdp3->OemId,
&AcpiTableInstance->Fadt3->Header.OemId,
6
);
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
//
// RSDT OEM information is updated to match FADT OEM information.
//
CopyMem (
&AcpiTableInstance->Rsdt3->OemId,
&AcpiTableInstance->Fadt3->Header.OemId,
6
);
CopyMem (
&AcpiTableInstance->Rsdt3->OemTableId,
&AcpiTableInstance->Fadt3->Header.OemTableId,
sizeof (UINT64)
);
AcpiTableInstance->Rsdt3->OemRevision = AcpiTableInstance->Fadt3->Header.OemRevision;
}
//
// XSDT OEM information is updated to match FADT OEM information.
//
CopyMem (
&AcpiTableInstance->Xsdt->OemId,
&AcpiTableInstance->Fadt3->Header.OemId,
6
);
CopyMem (
&AcpiTableInstance->Xsdt->OemTableId,
&AcpiTableInstance->Fadt3->Header.OemTableId,
sizeof (UINT64)
);
AcpiTableInstance->Xsdt->OemRevision = AcpiTableInstance->Fadt3->Header.OemRevision;
}
//
// Checksum the table
//
if (Checksum) {
AcpiPlatformChecksum (
CurrentTableList->Table,
CurrentTableList->Table->Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
break;
case EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE_SIGNATURE:
//
// Check that the table has not been previously added.
//
if (((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0 && AcpiTableInstance->Facs1 != NULL) ||
((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0 && AcpiTableInstance->Facs3 != NULL)
) {
gBS->FreePages (CurrentTableList->PageAddress, CurrentTableList->NumberOfPages);
gBS->FreePool (CurrentTableList);
return EFI_ACCESS_DENIED;
}
//
// FACS is referenced by FADT and is not part of RSDT
//
AddToRsdt = FALSE;
//
// Add the table to the appropriate table version
//
if ((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
//
// Save a pointer to the table
//
AcpiTableInstance->Facs1 = (EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *) CurrentTableList->Table;
//
// If FADT already exists, update table pointers.
//
if (AcpiTableInstance->Fadt1 != NULL) {
AcpiTableInstance->Fadt1->FirmwareCtrl = (UINT32) (UINTN) AcpiTableInstance->Facs1;
//
// Checksum FADT table
//
AcpiPlatformChecksum (
AcpiTableInstance->Fadt1,
AcpiTableInstance->Fadt1->Header.Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
}
if ((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) {
//
// Save a pointer to the table
//
AcpiTableInstance->Facs3 = (EFI_ACPI_3_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *) CurrentTableList->Table;
//
// If FADT already exists, update table pointers.
//
if (AcpiTableInstance->Fadt3 != NULL) {
//
// Note: If the FIRMWARE_CTRL is non-zero, then X_FIRMWARE_CTRL must be zero, and
// vice-versa.
//
if ((UINT64)(UINTN)AcpiTableInstance->Facs3 < BASE_4GB) {
AcpiTableInstance->Fadt3->FirmwareCtrl = (UINT32) (UINTN) AcpiTableInstance->Facs3;
ZeroMem (&AcpiTableInstance->Fadt3->XFirmwareCtrl, sizeof (UINT64));
} else {
Buffer64 = (UINT64) (UINTN) AcpiTableInstance->Facs3;
CopyMem (
&AcpiTableInstance->Fadt3->XFirmwareCtrl,
&Buffer64,
sizeof (UINT64)
);
AcpiTableInstance->Fadt3->FirmwareCtrl = 0;
}
//
// Checksum FADT table
//
AcpiPlatformChecksum (
AcpiTableInstance->Fadt3,
AcpiTableInstance->Fadt3->Header.Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
}
break;
case EFI_ACPI_1_0_DIFFERENTIATED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE:
//
// Check that the table has not been previously added.
//
if (((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0 && AcpiTableInstance->Dsdt1 != NULL) ||
((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0 && AcpiTableInstance->Dsdt3 != NULL)
) {
gBS->FreePages (CurrentTableList->PageAddress, CurrentTableList->NumberOfPages);
gBS->FreePool (CurrentTableList);
return EFI_ACCESS_DENIED;
}
//
// DSDT is referenced by FADT and is not part of RSDT
//
AddToRsdt = FALSE;
//
// Add the table to the appropriate table version
//
if ((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
//
// Save a pointer to the table
//
AcpiTableInstance->Dsdt1 = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTableList->Table;
//
// If FADT already exists, update table pointers.
//
if (AcpiTableInstance->Fadt1 != NULL) {
AcpiTableInstance->Fadt1->Dsdt = (UINT32) (UINTN) AcpiTableInstance->Dsdt1;
//
// Checksum FADT table
//
AcpiPlatformChecksum (
AcpiTableInstance->Fadt1,
AcpiTableInstance->Fadt1->Header.Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
}
if ((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) {
//
// Save a pointer to the table
//
AcpiTableInstance->Dsdt3 = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTableList->Table;
//
// If FADT already exists, update table pointers.
//
if (AcpiTableInstance->Fadt3 != NULL) {
if ((UINT64)(UINTN)AcpiTableInstance->Dsdt3 < BASE_4GB) {
AcpiTableInstance->Fadt3->Dsdt = (UINT32) (UINTN) AcpiTableInstance->Dsdt3;
//
// Comment block "the caller installs the tables in "FADT, DSDT" order"
// The below comments are also in "the caller installs the tables in "DSDT, FADT" order" comment block.
//
// The ACPI specification, up to and including revision 5.1 Errata A,
// allows the DSDT and X_DSDT fields to be both set in the FADT.
// (Obviously, this only makes sense if the DSDT address is representable in 4 bytes.)
// Starting with 5.1 Errata B, specifically for Mantis 1393 <https://mantis.uefi.org/mantis/view.php?id=1393>,
// the spec requires at most one of DSDT and X_DSDT fields to be set to a nonzero value,
// but strangely an exception is 6.0 that has no this requirement.
//
// Here we do not make the DSDT and X_DSDT fields mutual exclusion conditionally
// by checking FADT revision, but always set both DSDT and X_DSDT fields in the FADT
// to have better compatibility as some OS may have assumption to only consume X_DSDT
// field even the DSDT address is < 4G.
//
Buffer64 = AcpiTableInstance->Fadt3->Dsdt;
} else {
AcpiTableInstance->Fadt3->Dsdt = 0;
Buffer64 = (UINT64) (UINTN) AcpiTableInstance->Dsdt3;
}
CopyMem (&AcpiTableInstance->Fadt3->XDsdt, &Buffer64, sizeof (UINT64));
//
// Checksum FADT table
//
AcpiPlatformChecksum (
AcpiTableInstance->Fadt3,
AcpiTableInstance->Fadt3->Header.Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
}
//
// Checksum the table
//
if (Checksum) {
AcpiPlatformChecksum (
CurrentTableList->Table,
CurrentTableList->Table->Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
break;
default:
//
// Checksum the table
//
if (Checksum) {
AcpiPlatformChecksum (
CurrentTableList->Table,
CurrentTableList->Table->Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
break;
}
//
// Add the table to the current list of tables
//
InsertTailList (&AcpiTableInstance->TableList, &CurrentTableList->Link);
//
// Add the table to RSDT and/or XSDT table entry lists.
//
//
// Add to ACPI 1.0b table tree
//
if ((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
if (AddToRsdt) {
//
// If the table number exceed the gEfiAcpiMaxNumTables, enlarge the table buffer
//
if (AcpiTableInstance->NumberOfTableEntries1 >= mEfiAcpiMaxNumTables) {
Status = ReallocateAcpiTableBuffer (AcpiTableInstance);
ASSERT_EFI_ERROR (Status);
}
CurrentRsdtEntry = (UINT32 *)
(
(UINT8 *) AcpiTableInstance->Rsdt1 +
sizeof (EFI_ACPI_DESCRIPTION_HEADER) +
AcpiTableInstance->NumberOfTableEntries1 *
sizeof (UINT32)
);
//
// Add entry to the RSDT unless its the FACS or DSDT
//
*CurrentRsdtEntry = (UINT32) (UINTN) CurrentTableList->Table;
//
// Update RSDT length
//
AcpiTableInstance->Rsdt1->Length = AcpiTableInstance->Rsdt1->Length + sizeof (UINT32);
AcpiTableInstance->NumberOfTableEntries1++;
}
}
//
// Add to ACPI 2.0/3.0 table tree
//
if ((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) {
if (AddToRsdt) {
//
// If the table number exceed the gEfiAcpiMaxNumTables, enlarge the table buffer
//
if (AcpiTableInstance->NumberOfTableEntries3 >= mEfiAcpiMaxNumTables) {
Status = ReallocateAcpiTableBuffer (AcpiTableInstance);
ASSERT_EFI_ERROR (Status);
}
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
//
// At this time, it is assumed that RSDT and XSDT maintain parallel lists of tables.
// If it becomes necessary to maintain separate table lists, changes will be required.
//
CurrentRsdtEntry = (UINT32 *)
(
(UINT8 *) AcpiTableInstance->Rsdt3 +
sizeof (EFI_ACPI_DESCRIPTION_HEADER) +
AcpiTableInstance->NumberOfTableEntries3 *
sizeof (UINT32)
);
//
// Add entry to the RSDT
//
*CurrentRsdtEntry = (UINT32) (UINTN) CurrentTableList->Table;
//
// Update RSDT length
//
AcpiTableInstance->Rsdt3->Length = AcpiTableInstance->Rsdt3->Length + sizeof (UINT32);
}
//
// This pointer must not be directly dereferenced as the XSDT entries may not
// be 64 bit aligned resulting in a possible fault. Use CopyMem to update.
//
CurrentXsdtEntry = (VOID *)
(
(UINT8 *) AcpiTableInstance->Xsdt +
sizeof (EFI_ACPI_DESCRIPTION_HEADER) +
AcpiTableInstance->NumberOfTableEntries3 *
sizeof (UINT64)
);
//
// Add entry to XSDT, XSDT expects 64 bit pointers, but
// the table pointers in XSDT are not aligned on 8 byte boundary.
//
Buffer64 = (UINT64) (UINTN) CurrentTableList->Table;
CopyMem (
CurrentXsdtEntry,
&Buffer64,
sizeof (UINT64)
);
//
// Update length
//
AcpiTableInstance->Xsdt->Length = AcpiTableInstance->Xsdt->Length + sizeof (UINT64);
AcpiTableInstance->NumberOfTableEntries3++;
}
}
ChecksumCommonTables (AcpiTableInstance);
return EFI_SUCCESS;
}
/**
This function finds the table specified by the handle and returns a pointer to it.
If the handle is not found, EFI_NOT_FOUND is returned and the contents of Table are
undefined.
@param Handle Table to find.
@param TableList Table list to search
@param Table Pointer to table found.
@return EFI_SUCCESS The function completed successfully.
@return EFI_NOT_FOUND No table found matching the handle specified.
**/
EFI_STATUS
FindTableByHandle (
IN UINTN Handle,
IN LIST_ENTRY *TableList,
OUT EFI_ACPI_TABLE_LIST **Table
)
{
LIST_ENTRY *CurrentLink;
EFI_ACPI_TABLE_LIST *CurrentTable;
//
// Check for invalid input parameters
//
ASSERT (Table);
//
// Find the table
//
CurrentLink = TableList->ForwardLink;
while (CurrentLink != TableList) {
CurrentTable = EFI_ACPI_TABLE_LIST_FROM_LINK (CurrentLink);
if (CurrentTable->Handle == Handle) {
//
// Found handle, so return this table.
//
*Table = CurrentTable;
return EFI_SUCCESS;
}
CurrentLink = CurrentLink->ForwardLink;
}
//
// Table not found
//
return EFI_NOT_FOUND;
}
/**
This function removes a basic table from the RSDT and/or XSDT.
For Acpi 1.0 tables, pass in the Rsdt.
For Acpi 2.0 tables, pass in both Rsdt and Xsdt.
@param Table Pointer to table found.
@param NumberOfTableEntries Current number of table entries in the RSDT/XSDT
@param Rsdt Pointer to the RSDT to remove from
@param Xsdt Pointer to the Xsdt to remove from
@return EFI_SUCCESS The function completed successfully.
@return EFI_INVALID_PARAMETER The table was not found in both Rsdt and Xsdt.
**/
EFI_STATUS
RemoveTableFromRsdt (
IN OUT EFI_ACPI_TABLE_LIST * Table,
IN OUT UINTN *NumberOfTableEntries,
IN OUT EFI_ACPI_DESCRIPTION_HEADER * Rsdt OPTIONAL,
IN OUT EFI_ACPI_DESCRIPTION_HEADER * Xsdt OPTIONAL
)
{
UINT32 *CurrentRsdtEntry;
VOID *CurrentXsdtEntry;
UINT64 CurrentTablePointer64;
UINTN Index;
//
// Check for invalid input parameters
//
ASSERT (Table);
ASSERT (NumberOfTableEntries);
ASSERT (Rsdt || Xsdt);
//
// Find the table entry in the RSDT and XSDT
//
for (Index = 0; Index < *NumberOfTableEntries; Index++) {
//
// At this time, it is assumed that RSDT and XSDT maintain parallel lists of tables.
// If it becomes necessary to maintain separate table lists, changes will be required.
//
if (Rsdt != NULL) {
CurrentRsdtEntry = (UINT32 *) ((UINT8 *) Rsdt + sizeof (EFI_ACPI_DESCRIPTION_HEADER) + Index * sizeof (UINT32));
} else {
CurrentRsdtEntry = NULL;
}
if (Xsdt != NULL) {
//
// This pointer must not be directly dereferenced as the XSDT entries may not
// be 64 bit aligned resulting in a possible fault. Use CopyMem to update.
//
CurrentXsdtEntry = (VOID *) ((UINT8 *) Xsdt + sizeof (EFI_ACPI_DESCRIPTION_HEADER) + Index * sizeof (UINT64));
//
// Read the entry value out of the XSDT
//
CopyMem (&CurrentTablePointer64, CurrentXsdtEntry, sizeof (UINT64));
} else {
//
// Initialize to NULL
//
CurrentXsdtEntry = 0;
CurrentTablePointer64 = 0;
}
//
// Check if we have found the corresponding entry in both RSDT and XSDT
//
if (((Rsdt == NULL) || *CurrentRsdtEntry == (UINT32) (UINTN) Table->Table) &&
((Xsdt == NULL) || CurrentTablePointer64 == (UINT64) (UINTN) Table->Table)
) {
//
// Found entry, so copy all following entries and shrink table
// We actually copy all + 1 to copy the initialized value of memory over
// the last entry.
//
if (Rsdt != NULL) {
CopyMem (CurrentRsdtEntry, CurrentRsdtEntry + 1, (*NumberOfTableEntries - Index) * sizeof (UINT32));
Rsdt->Length = Rsdt->Length - sizeof (UINT32);
}
if (Xsdt != NULL) {
CopyMem (CurrentXsdtEntry, ((UINT64 *) CurrentXsdtEntry) + 1, (*NumberOfTableEntries - Index) * sizeof (UINT64));
Xsdt->Length = Xsdt->Length - sizeof (UINT64);
}
break;
} else if (Index + 1 == *NumberOfTableEntries) {
//
// At the last entry, and table not found
//
return EFI_INVALID_PARAMETER;
}
}
//
// Checksum the tables
//
if (Rsdt != NULL) {
AcpiPlatformChecksum (
Rsdt,
Rsdt->Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
if (Xsdt != NULL) {
AcpiPlatformChecksum (
Xsdt,
Xsdt->Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
//
// Decrement the number of tables
//
(*NumberOfTableEntries)--;
return EFI_SUCCESS;
}
/**
This function removes a table and frees any associated memory.
@param AcpiTableInstance Instance of the protocol.
@param Version Version(s) to delete.
@param Table Pointer to table found.
@return EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
DeleteTable (
IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance,
IN EFI_ACPI_TABLE_VERSION Version,
IN OUT EFI_ACPI_TABLE_LIST *Table
)
{
UINT32 CurrentTableSignature;
BOOLEAN RemoveFromRsdt;
//
// Check for invalid input parameters
//
ASSERT (AcpiTableInstance);
ASSERT (Table);
//
// Init locals
//
RemoveFromRsdt = TRUE;
//
// Check for Table->Table
//
ASSERT (Table->Table != NULL);
CurrentTableSignature = ((EFI_ACPI_COMMON_HEADER *) Table->Table)->Signature;
//
// Basic tasks to accomplish delete are:
// Determine removal requirements (in RSDT/XSDT or not)
// Remove entry from RSDT/XSDT
// Remove any table references to the table
// If no one is using the table
// Free the table (removing pointers from private data and tables)
// Remove from list
// Free list structure
//
//
// Determine if this table is in the RSDT or XSDT
//
if ((CurrentTableSignature == EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE_SIGNATURE) ||
(CurrentTableSignature == EFI_ACPI_2_0_DIFFERENTIATED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE) ||
(CurrentTableSignature == EFI_ACPI_3_0_DIFFERENTIATED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE)
) {
RemoveFromRsdt = FALSE;
}
//
// We don't remove the FADT in the standard way because some
// OS expect the FADT to be early in the table list.
// So we always put it as the first element in the list.
//
if (CurrentTableSignature == EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE) {
RemoveFromRsdt = FALSE;
}
//
// Remove the table from RSDT and XSDT
//
if (Table->Table != NULL) {
//
// This is a basic table, remove it from any lists and the Rsdt and/or Xsdt
//
if (Version & EFI_ACPI_TABLE_VERSION_NONE & Table->Version) {
//
// Remove this version from the table
//
Table->Version = Table->Version &~EFI_ACPI_TABLE_VERSION_NONE;
}
if (Version & EFI_ACPI_TABLE_VERSION_1_0B & Table->Version) {
//
// Remove this version from the table
//
Table->Version = Table->Version &~EFI_ACPI_TABLE_VERSION_1_0B;
//
// Remove from Rsdt. We don't care about the return value because it is
// acceptable for the table to not exist in Rsdt.
// We didn't add some tables so we don't remove them.
//
if (RemoveFromRsdt) {
RemoveTableFromRsdt (
Table,
&AcpiTableInstance->NumberOfTableEntries1,
AcpiTableInstance->Rsdt1,
NULL
);
}
}
if (Version & ACPI_TABLE_VERSION_GTE_2_0 & Table->Version) {
//
// Remove this version from the table
//
Table->Version = Table->Version &~(Version & ACPI_TABLE_VERSION_GTE_2_0);
//
// Remove from Rsdt and Xsdt. We don't care about the return value
// because it is acceptable for the table to not exist in Rsdt/Xsdt.
// We didn't add some tables so we don't remove them.
//
if (RemoveFromRsdt) {
RemoveTableFromRsdt (
Table,
&AcpiTableInstance->NumberOfTableEntries3,
AcpiTableInstance->Rsdt3,
AcpiTableInstance->Xsdt
);
}
}
//
// Free the table, clean up any dependent tables and our private data pointers.
//
switch (Table->Table->Signature) {
case EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE:
if ((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
AcpiTableInstance->Fadt1 = NULL;
}
if ((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) {
AcpiTableInstance->Fadt3 = NULL;
}
break;
case EFI_ACPI_3_0_FIRMWARE_ACPI_CONTROL_STRUCTURE_SIGNATURE:
if ((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
AcpiTableInstance->Facs1 = NULL;
//
// Update FADT table pointers
//
if (AcpiTableInstance->Fadt1 != NULL) {
AcpiTableInstance->Fadt1->FirmwareCtrl = 0;
//
// Checksum table
//
AcpiPlatformChecksum (
AcpiTableInstance->Fadt1,
AcpiTableInstance->Fadt1->Header.Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
}
if ((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) {
AcpiTableInstance->Facs3 = NULL;
//
// Update FADT table pointers
//
if (AcpiTableInstance->Fadt3 != NULL) {
AcpiTableInstance->Fadt3->FirmwareCtrl = 0;
ZeroMem (&AcpiTableInstance->Fadt3->XFirmwareCtrl, sizeof (UINT64));
//
// Checksum table
//
AcpiPlatformChecksum (
AcpiTableInstance->Fadt3,
AcpiTableInstance->Fadt3->Header.Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
}
break;
case EFI_ACPI_3_0_DIFFERENTIATED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE:
if ((Version & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
AcpiTableInstance->Dsdt1 = NULL;
//
// Update FADT table pointers
//
if (AcpiTableInstance->Fadt1 != NULL) {
AcpiTableInstance->Fadt1->Dsdt = 0;
//
// Checksum table
//
AcpiPlatformChecksum (
AcpiTableInstance->Fadt1,
AcpiTableInstance->Fadt1->Header.Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
}
if ((Version & ACPI_TABLE_VERSION_GTE_2_0) != 0) {
AcpiTableInstance->Dsdt3 = NULL;
//
// Update FADT table pointers
//
if (AcpiTableInstance->Fadt3 != NULL) {
AcpiTableInstance->Fadt3->Dsdt = 0;
ZeroMem (&AcpiTableInstance->Fadt3->XDsdt, sizeof (UINT64));
//
// Checksum table
//
AcpiPlatformChecksum (
AcpiTableInstance->Fadt3,
AcpiTableInstance->Fadt3->Header.Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
}
break;
default:
//
// Do nothing
//
break;
}
}
//
// If no version is using this table anymore, remove and free list entry.
//
if (Table->Version == 0) {
//
// Free the Table
//
gBS->FreePages (Table->PageAddress, Table->NumberOfPages);
RemoveEntryList (&(Table->Link));
gBS->FreePool (Table);
}
//
// Done
//
return EFI_SUCCESS;
}
/**
This function finds and removes the table specified by the handle.
@param AcpiTableInstance Instance of the protocol.
@param Version Bitmask of which versions to remove.
@param Handle Table to remove.
@return EFI_SUCCESS The function completed successfully.
@return EFI_ABORTED An error occurred.
@return EFI_NOT_FOUND Handle not found in table list.
**/
EFI_STATUS
RemoveTableFromList (
IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance,
IN EFI_ACPI_TABLE_VERSION Version,
IN UINTN Handle
)
{
EFI_ACPI_TABLE_LIST *Table;
EFI_STATUS Status;
Table = (EFI_ACPI_TABLE_LIST*) NULL;
//
// Check for invalid input parameters
//
ASSERT (AcpiTableInstance);
//
// Find the table
//
Status = FindTableByHandle (
Handle,
&AcpiTableInstance->TableList,
&Table
);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
//
// Remove the table
//
Status = DeleteTable (AcpiTableInstance, Version, Table);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
//
// Completed successfully
//
return EFI_SUCCESS;
}
/**
This function calculates and updates an UINT8 checksum.
@param Buffer Pointer to buffer to checksum
@param Size Number of bytes to checksum
@param ChecksumOffset Offset to place the checksum result in
@return EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
AcpiPlatformChecksum (
IN VOID *Buffer,
IN UINTN Size,
IN UINTN ChecksumOffset
)
{
UINT8 Sum;
UINT8 *Ptr;
Sum = 0;
//
// Initialize pointer
//
Ptr = Buffer;
//
// set checksum to 0 first
//
Ptr[ChecksumOffset] = 0;
//
// add all content of buffer
//
while ((Size--) != 0) {
Sum = (UINT8) (Sum + (*Ptr++));
}
//
// set checksum
//
Ptr = Buffer;
Ptr[ChecksumOffset] = (UINT8) (0xff - Sum + 1);
return EFI_SUCCESS;
}
/**
Checksum all versions of the common tables, RSDP, RSDT, XSDT.
@param AcpiTableInstance Protocol instance private data.
@return EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
ChecksumCommonTables (
IN OUT EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance
)
{
//
// RSDP ACPI 1.0 checksum for 1.0 table. This is only the first 20 bytes of the structure
//
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
AcpiPlatformChecksum (
AcpiTableInstance->Rsdp1,
sizeof (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER),
OFFSET_OF (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER,
Checksum)
);
}
//
// RSDP ACPI 1.0 checksum for 2.0/3.0 table. This is only the first 20 bytes of the structure
//
AcpiPlatformChecksum (
AcpiTableInstance->Rsdp3,
sizeof (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER),
OFFSET_OF (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER,
Checksum)
);
//
// RSDP ACPI 2.0/3.0 checksum, this is the entire table
//
AcpiPlatformChecksum (
AcpiTableInstance->Rsdp3,
sizeof (EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_POINTER),
OFFSET_OF (EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_POINTER,
ExtendedChecksum)
);
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
//
// RSDT checksums
//
AcpiPlatformChecksum (
AcpiTableInstance->Rsdt1,
AcpiTableInstance->Rsdt1->Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
AcpiPlatformChecksum (
AcpiTableInstance->Rsdt3,
AcpiTableInstance->Rsdt3->Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
}
//
// XSDT checksum
//
AcpiPlatformChecksum (
AcpiTableInstance->Xsdt,
AcpiTableInstance->Xsdt->Length,
OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER,
Checksum)
);
return EFI_SUCCESS;
}
/**
Constructor for the ACPI table protocol. Initializes instance
data.
@param AcpiTableInstance Instance to construct
@return EFI_SUCCESS Instance initialized.
@return EFI_OUT_OF_RESOURCES Unable to allocate required resources.
**/
EFI_STATUS
AcpiTableAcpiTableConstructor (
EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance
)
{
EFI_STATUS Status;
UINT64 CurrentData;
UINTN TotalSize;
UINTN RsdpTableSize;
UINT8 *Pointer;
EFI_PHYSICAL_ADDRESS PageAddress;
//
// Check for invalid input parameters
//
ASSERT (AcpiTableInstance);
//
// If ACPI v1.0b is among the ACPI versions we aim to support, we have to
// ensure that all memory allocations are below 4 GB.
//
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
mAcpiTableAllocType = AllocateMaxAddress;
} else {
mAcpiTableAllocType = AllocateAnyPages;
}
InitializeListHead (&AcpiTableInstance->TableList);
AcpiTableInstance->CurrentHandle = 1;
AcpiTableInstance->AcpiTableProtocol.InstallAcpiTable = InstallAcpiTable;
AcpiTableInstance->AcpiTableProtocol.UninstallAcpiTable = UninstallAcpiTable;
if (FeaturePcdGet (PcdInstallAcpiSdtProtocol)) {
SdtAcpiTableAcpiSdtConstructor (AcpiTableInstance);
}
//
// Create RSDP table
//
RsdpTableSize = sizeof (EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_POINTER);
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
RsdpTableSize += sizeof (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER);
}
PageAddress = 0xFFFFFFFF;
Status = gBS->AllocatePages (
mAcpiTableAllocType,
EfiACPIReclaimMemory,
EFI_SIZE_TO_PAGES (RsdpTableSize),
&PageAddress
);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
Pointer = (UINT8 *) (UINTN) PageAddress;
ZeroMem (Pointer, RsdpTableSize);
AcpiTableInstance->Rsdp1 = (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER *) Pointer;
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
Pointer += sizeof (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER);
}
AcpiTableInstance->Rsdp3 = (EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_POINTER *) Pointer;
//
// Create RSDT, XSDT structures
//
TotalSize = sizeof (EFI_ACPI_DESCRIPTION_HEADER) + // for ACPI 2.0/3.0 XSDT
mEfiAcpiMaxNumTables * sizeof (UINT64);
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
TotalSize += sizeof (EFI_ACPI_DESCRIPTION_HEADER) + // for ACPI 1.0 RSDT
mEfiAcpiMaxNumTables * sizeof (UINT32) +
sizeof (EFI_ACPI_DESCRIPTION_HEADER) + // for ACPI 2.0/3.0 RSDT
mEfiAcpiMaxNumTables * sizeof (UINT32);
}
//
// Allocate memory in the lower 32 bit of address range for
// compatibility with ACPI 1.0 OS.
//
// This is done because ACPI 1.0 pointers are 32 bit values.
// ACPI 2.0 OS and all 64 bit OS must use the 64 bit ACPI table addresses.
// There is no architectural reason these should be below 4GB, it is purely
// for convenience of implementation that we force memory below 4GB.
//
PageAddress = 0xFFFFFFFF;
Status = gBS->AllocatePages (
mAcpiTableAllocType,
EfiACPIReclaimMemory,
EFI_SIZE_TO_PAGES (TotalSize),
&PageAddress
);
if (EFI_ERROR (Status)) {
gBS->FreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)AcpiTableInstance->Rsdp1, EFI_SIZE_TO_PAGES (RsdpTableSize));
return EFI_OUT_OF_RESOURCES;
}
Pointer = (UINT8 *) (UINTN) PageAddress;
ZeroMem (Pointer, TotalSize);
AcpiTableInstance->Rsdt1 = (EFI_ACPI_DESCRIPTION_HEADER *) Pointer;
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
Pointer += (sizeof (EFI_ACPI_DESCRIPTION_HEADER) + EFI_ACPI_MAX_NUM_TABLES * sizeof (UINT32));
AcpiTableInstance->Rsdt3 = (EFI_ACPI_DESCRIPTION_HEADER *) Pointer;
Pointer += (sizeof (EFI_ACPI_DESCRIPTION_HEADER) + EFI_ACPI_MAX_NUM_TABLES * sizeof (UINT32));
}
AcpiTableInstance->Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) Pointer;
//
// Initialize RSDP
//
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
CurrentData = EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER_SIGNATURE;
CopyMem (&AcpiTableInstance->Rsdp1->Signature, &CurrentData, sizeof (UINT64));
CopyMem (AcpiTableInstance->Rsdp1->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (AcpiTableInstance->Rsdp1->OemId));
AcpiTableInstance->Rsdp1->Reserved = EFI_ACPI_RESERVED_BYTE;
AcpiTableInstance->Rsdp1->RsdtAddress = (UINT32) (UINTN) AcpiTableInstance->Rsdt1;
}
CurrentData = EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_POINTER_SIGNATURE;
CopyMem (&AcpiTableInstance->Rsdp3->Signature, &CurrentData, sizeof (UINT64));
CopyMem (AcpiTableInstance->Rsdp3->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (AcpiTableInstance->Rsdp3->OemId));
AcpiTableInstance->Rsdp3->Revision = EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_POINTER_REVISION;
AcpiTableInstance->Rsdp3->Length = sizeof (EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_POINTER);
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
AcpiTableInstance->Rsdp3->RsdtAddress = (UINT32) (UINTN) AcpiTableInstance->Rsdt3;
}
CurrentData = (UINT64) (UINTN) AcpiTableInstance->Xsdt;
CopyMem (&AcpiTableInstance->Rsdp3->XsdtAddress, &CurrentData, sizeof (UINT64));
SetMem (AcpiTableInstance->Rsdp3->Reserved, 3, EFI_ACPI_RESERVED_BYTE);
if ((PcdGet32 (PcdAcpiExposedTableVersions) & EFI_ACPI_TABLE_VERSION_1_0B) != 0) {
//
// Initialize Rsdt
//
// Note that we "reserve" one entry for the FADT so it can always be
// at the beginning of the list of tables. Some OS don't seem
// to find it correctly if it is too far down the list.
//
AcpiTableInstance->Rsdt1->Signature = EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE;
AcpiTableInstance->Rsdt1->Length = sizeof (EFI_ACPI_DESCRIPTION_HEADER);
AcpiTableInstance->Rsdt1->Revision = EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_TABLE_REVISION;
CopyMem (AcpiTableInstance->Rsdt1->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (AcpiTableInstance->Rsdt1->OemId));
CurrentData = PcdGet64 (PcdAcpiDefaultOemTableId);
CopyMem (&AcpiTableInstance->Rsdt1->OemTableId, &CurrentData, sizeof (UINT64));
AcpiTableInstance->Rsdt1->OemRevision = PcdGet32 (PcdAcpiDefaultOemRevision);
AcpiTableInstance->Rsdt1->CreatorId = PcdGet32 (PcdAcpiDefaultCreatorId);
AcpiTableInstance->Rsdt1->CreatorRevision = PcdGet32 (PcdAcpiDefaultCreatorRevision);
//
// We always reserve first one for FADT
//
AcpiTableInstance->NumberOfTableEntries1 = 1;
AcpiTableInstance->Rsdt1->Length = AcpiTableInstance->Rsdt1->Length + sizeof(UINT32);
AcpiTableInstance->Rsdt3->Signature = EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE;
AcpiTableInstance->Rsdt3->Length = sizeof (EFI_ACPI_DESCRIPTION_HEADER);
AcpiTableInstance->Rsdt3->Revision = EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_TABLE_REVISION;
CopyMem (AcpiTableInstance->Rsdt3->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (AcpiTableInstance->Rsdt3->OemId));
CurrentData = PcdGet64 (PcdAcpiDefaultOemTableId);
CopyMem (&AcpiTableInstance->Rsdt3->OemTableId, &CurrentData, sizeof (UINT64));
AcpiTableInstance->Rsdt3->OemRevision = PcdGet32 (PcdAcpiDefaultOemRevision);
AcpiTableInstance->Rsdt3->CreatorId = PcdGet32 (PcdAcpiDefaultCreatorId);
AcpiTableInstance->Rsdt3->CreatorRevision = PcdGet32 (PcdAcpiDefaultCreatorRevision);
//
// We always reserve first one for FADT
//
AcpiTableInstance->Rsdt3->Length = AcpiTableInstance->Rsdt3->Length + sizeof(UINT32);
}
AcpiTableInstance->NumberOfTableEntries3 = 1;
//
// Initialize Xsdt
//
AcpiTableInstance->Xsdt->Signature = EFI_ACPI_3_0_EXTENDED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE;
AcpiTableInstance->Xsdt->Length = sizeof (EFI_ACPI_DESCRIPTION_HEADER);
AcpiTableInstance->Xsdt->Revision = EFI_ACPI_3_0_EXTENDED_SYSTEM_DESCRIPTION_TABLE_REVISION;
CopyMem (AcpiTableInstance->Xsdt->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (AcpiTableInstance->Xsdt->OemId));
CurrentData = PcdGet64 (PcdAcpiDefaultOemTableId);
CopyMem (&AcpiTableInstance->Xsdt->OemTableId, &CurrentData, sizeof (UINT64));
AcpiTableInstance->Xsdt->OemRevision = PcdGet32 (PcdAcpiDefaultOemRevision);
AcpiTableInstance->Xsdt->CreatorId = PcdGet32 (PcdAcpiDefaultCreatorId);
AcpiTableInstance->Xsdt->CreatorRevision = PcdGet32 (PcdAcpiDefaultCreatorRevision);
//
// We always reserve first one for FADT
//
AcpiTableInstance->Xsdt->Length = AcpiTableInstance->Xsdt->Length + sizeof(UINT64);
ChecksumCommonTables (AcpiTableInstance);
//
// Completed successfully
//
return EFI_SUCCESS;
}
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