/******************************************************************************
*
* Module Name: tbxfload - Table load/unload external interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2018, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#define EXPORT_ACPI_INTERFACES
#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#include "actables.h"
#include "acevents.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbxfload")
/*******************************************************************************
*
* FUNCTION: AcpiLoadTables
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
*
******************************************************************************/
ACPI_STATUS ACPI_INIT_FUNCTION
AcpiLoadTables (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiLoadTables);
/*
* Install the default operation region handlers. These are the
* handlers that are defined by the ACPI specification to be
* "always accessible" -- namely, SystemMemory, SystemIO, and
* PCI_Config. This also means that no _REG methods need to be
* run for these address spaces. We need to have these handlers
* installed before any AML code can be executed, especially any
* module-level code (11/2015).
* Note that we allow OSPMs to install their own region handlers
* between AcpiInitializeSubsystem() and AcpiLoadTables() to use
* their customized default region handlers.
*/
Status = AcpiEvInstallRegionHandlers ();
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status, "During Region initialization"));
return_ACPI_STATUS (Status);
}
/* Load the namespace from the tables */
Status = AcpiTbLoadNamespace ();
/* Don't let single failures abort the load */
if (Status == AE_CTRL_TERMINATE)
{
Status = AE_OK;
}
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"While loading namespace from ACPI tables"));
}
if (AcpiGbl_ExecuteTablesAsMethods || !AcpiGbl_GroupModuleLevelCode)
{
/*
* If the module-level code support is enabled, initialize the objects
* in the namespace that remain uninitialized. This runs the executable
* AML that may be part of the declaration of these name objects:
* OperationRegions, BufferFields, Buffers, and Packages.
*
* Note: The module-level code is optional at this time, but will
* become the default in the future.
*/
Status = AcpiNsInitializeObjects ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
AcpiGbl_NamespaceInitialized = TRUE;
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL_INIT (AcpiLoadTables)
/*******************************************************************************
*
* FUNCTION: AcpiTbLoadNamespace
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
* the RSDT/XSDT.
*
******************************************************************************/
ACPI_STATUS
AcpiTbLoadNamespace (
void)
{
ACPI_STATUS Status;
UINT32 i;
ACPI_TABLE_HEADER *NewDsdt;
ACPI_TABLE_DESC *Table;
UINT32 TablesLoaded = 0;
UINT32 TablesFailed = 0;
ACPI_FUNCTION_TRACE (TbLoadNamespace);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/*
* Load the namespace. The DSDT is required, but any SSDT and
* PSDT tables are optional. Verify the DSDT.
*/
Table = &AcpiGbl_RootTableList.Tables[AcpiGbl_DsdtIndex];
if (!AcpiGbl_RootTableList.CurrentTableCount ||
!ACPI_COMPARE_NAME (Table->Signature.Ascii, ACPI_SIG_DSDT) ||
ACPI_FAILURE (AcpiTbValidateTable (Table)))
{
Status = AE_NO_ACPI_TABLES;
goto UnlockAndExit;
}
/*
* Save the DSDT pointer for simple access. This is the mapped memory
* address. We must take care here because the address of the .Tables
* array can change dynamically as tables are loaded at run-time. Note:
* .Pointer field is not validated until after call to AcpiTbValidateTable.
*/
AcpiGbl_DSDT = Table->Pointer;
/*
* Optionally copy the entire DSDT to local memory (instead of simply
* mapping it.) There are some BIOSs that corrupt or replace the original
* DSDT, creating the need for this option. Default is FALSE, do not copy
* the DSDT.
*/
if (AcpiGbl_CopyDsdtLocally)
{
NewDsdt = AcpiTbCopyDsdt (AcpiGbl_DsdtIndex);
if (NewDsdt)
{
AcpiGbl_DSDT = NewDsdt;
}
}
/*
* Save the original DSDT header for detection of table corruption
* and/or replacement of the DSDT from outside the OS.
*/
memcpy (&AcpiGbl_OriginalDsdtHeader, AcpiGbl_DSDT,
sizeof (ACPI_TABLE_HEADER));
/* Load and parse tables */
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
Status = AcpiNsLoadTable (AcpiGbl_DsdtIndex, AcpiGbl_RootNode);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status, "[DSDT] table load failed"));
TablesFailed++;
}
else
{
TablesLoaded++;
}
/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
Table = &AcpiGbl_RootTableList.Tables[i];
if (!Table->Address ||
(!ACPI_COMPARE_NAME (Table->Signature.Ascii, ACPI_SIG_SSDT) &&
!ACPI_COMPARE_NAME (Table->Signature.Ascii, ACPI_SIG_PSDT) &&
!ACPI_COMPARE_NAME (Table->Signature.Ascii, ACPI_SIG_OSDT)) ||
ACPI_FAILURE (AcpiTbValidateTable (Table)))
{
continue;
}
/* Ignore errors while loading tables, get as many as possible */
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
Status = AcpiNsLoadTable (i, AcpiGbl_RootNode);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status, "(%4.4s:%8.8s) while loading table",
Table->Signature.Ascii, Table->Pointer->OemTableId));
TablesFailed++;
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n",
Table->Signature.Ascii, Table->Pointer->OemTableId));
}
else
{
TablesLoaded++;
}
}
if (!TablesFailed)
{
ACPI_INFO ((
"%u ACPI AML tables successfully acquired and loaded",
TablesLoaded));
}
else
{
ACPI_ERROR ((AE_INFO,
"%u table load failures, %u successful",
TablesFailed, TablesLoaded));
/* Indicate at least one failure */
Status = AE_CTRL_TERMINATE;
}
#ifdef ACPI_APPLICATION
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "\n"));
#endif
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiInstallTable
*
* PARAMETERS: Address - Address of the ACPI table to be installed.
* Physical - Whether the address is a physical table
* address or not
*
* RETURN: Status
*
* DESCRIPTION: Dynamically install an ACPI table.
* Note: This function should only be invoked after
* AcpiInitializeTables() and before AcpiLoadTables().
*
******************************************************************************/
ACPI_STATUS ACPI_INIT_FUNCTION
AcpiInstallTable (
ACPI_PHYSICAL_ADDRESS Address,
BOOLEAN Physical)
{
ACPI_STATUS Status;
UINT8 Flags;
UINT32 TableIndex;
ACPI_FUNCTION_TRACE (AcpiInstallTable);
if (Physical)
{
Flags = ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL;
}
else
{
Flags = ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL;
}
Status = AcpiTbInstallStandardTable (Address, Flags,
FALSE, FALSE, &TableIndex);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL_INIT (AcpiInstallTable)
/*******************************************************************************
*
* FUNCTION: AcpiLoadTable
*
* PARAMETERS: Table - Pointer to a buffer containing the ACPI
* table to be loaded.
*
* RETURN: Status
*
* DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
* be a valid ACPI table with a valid ACPI table header.
* Note1: Mainly intended to support hotplug addition of SSDTs.
* Note2: Does not copy the incoming table. User is responsible
* to ensure that the table is not deleted or unmapped.
*
******************************************************************************/
ACPI_STATUS
AcpiLoadTable (
ACPI_TABLE_HEADER *Table)
{
ACPI_STATUS Status;
UINT32 TableIndex;
ACPI_FUNCTION_TRACE (AcpiLoadTable);
/* Parameter validation */
if (!Table)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Install the table and load it into the namespace */
ACPI_INFO (("Host-directed Dynamic ACPI Table Load:"));
Status = AcpiTbInstallAndLoadTable (ACPI_PTR_TO_PHYSADDR (Table),
ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, FALSE, &TableIndex);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiLoadTable)
/*******************************************************************************
*
* FUNCTION: AcpiUnloadParentTable
*
* PARAMETERS: Object - Handle to any namespace object owned by
* the table to be unloaded
*
* RETURN: Status
*
* DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
* the table and deletes all namespace objects associated with
* that table. Unloading of the DSDT is not allowed.
* Note: Mainly intended to support hotplug removal of SSDTs.
*
******************************************************************************/
ACPI_STATUS
AcpiUnloadParentTable (
ACPI_HANDLE Object)
{
ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Object);
ACPI_STATUS Status = AE_NOT_EXIST;
ACPI_OWNER_ID OwnerId;
UINT32 i;
ACPI_FUNCTION_TRACE (AcpiUnloadParentTable);
/* Parameter validation */
if (!Object)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* The node OwnerId is currently the same as the parent table ID.
* However, this could change in the future.
*/
OwnerId = Node->OwnerId;
if (!OwnerId)
{
/* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */
return_ACPI_STATUS (AE_TYPE);
}
/* Must acquire the table lock during this operation */
Status = AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Find the table in the global table list */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
{
if (OwnerId != AcpiGbl_RootTableList.Tables[i].OwnerId)
{
continue;
}
/*
* Allow unload of SSDT and OEMx tables only. Do not allow unload
* of the DSDT. No other types of tables should get here, since
* only these types can contain AML and thus are the only types
* that can create namespace objects.
*/
if (ACPI_COMPARE_NAME (
AcpiGbl_RootTableList.Tables[i].Signature.Ascii,
ACPI_SIG_DSDT))
{
Status = AE_TYPE;
break;
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
Status = AcpiTbUnloadTable (i);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
break;
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable)