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/******************************************************************************
*
* Module Name: tbxface - Public interfaces to the ACPI subsystem
* ACPI table oriented interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2011, 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 __TBXFACE_C__
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#include <contrib/dev/acpica/include/actables.h>
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbxface")
/* Local prototypes */
static ACPI_STATUS
AcpiTbLoadNamespace (
void);
/*******************************************************************************
*
* FUNCTION: AcpiAllocateRootTable
*
* PARAMETERS: InitialTableCount - Size of InitialTableArray, in number of
* ACPI_TABLE_DESC structures
*
* RETURN: Status
*
* DESCRIPTION: Allocate a root table array. Used by iASL compiler and
* AcpiInitializeTables.
*
******************************************************************************/
ACPI_STATUS
AcpiAllocateRootTable (
UINT32 InitialTableCount)
{
AcpiGbl_RootTableList.MaxTableCount = InitialTableCount;
AcpiGbl_RootTableList.Flags = ACPI_ROOT_ALLOW_RESIZE;
return (AcpiTbResizeRootTableList ());
}
/*******************************************************************************
*
* FUNCTION: AcpiInitializeTables
*
* PARAMETERS: InitialTableArray - Pointer to an array of pre-allocated
* ACPI_TABLE_DESC structures. If NULL, the
* array is dynamically allocated.
* InitialTableCount - Size of InitialTableArray, in number of
* ACPI_TABLE_DESC structures
* AllowRealloc - Flag to tell Table Manager if resize of
* pre-allocated array is allowed. Ignored
* if InitialTableArray is NULL.
*
* RETURN: Status
*
* DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT.
*
* NOTE: Allows static allocation of the initial table array in order
* to avoid the use of dynamic memory in confined environments
* such as the kernel boot sequence where it may not be available.
*
* If the host OS memory managers are initialized, use NULL for
* InitialTableArray, and the table will be dynamically allocated.
*
******************************************************************************/
ACPI_STATUS
AcpiInitializeTables (
ACPI_TABLE_DESC *InitialTableArray,
UINT32 InitialTableCount,
BOOLEAN AllowResize)
{
ACPI_PHYSICAL_ADDRESS RsdpAddress;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiInitializeTables);
/*
* Set up the Root Table Array
* Allocate the table array if requested
*/
if (!InitialTableArray)
{
Status = AcpiAllocateRootTable (InitialTableCount);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
else
{
/* Root Table Array has been statically allocated by the host */
ACPI_MEMSET (InitialTableArray, 0,
(ACPI_SIZE) InitialTableCount * sizeof (ACPI_TABLE_DESC));
AcpiGbl_RootTableList.Tables = InitialTableArray;
AcpiGbl_RootTableList.MaxTableCount = InitialTableCount;
AcpiGbl_RootTableList.Flags = ACPI_ROOT_ORIGIN_UNKNOWN;
if (AllowResize)
{
AcpiGbl_RootTableList.Flags |= ACPI_ROOT_ALLOW_RESIZE;
}
}
/* Get the address of the RSDP */
RsdpAddress = AcpiOsGetRootPointer ();
if (!RsdpAddress)
{
return_ACPI_STATUS (AE_NOT_FOUND);
}
/*
* Get the root table (RSDT or XSDT) and extract all entries to the local
* Root Table Array. This array contains the information of the RSDT/XSDT
* in a common, more useable format.
*/
Status = AcpiTbParseRootTable (RsdpAddress);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiInitializeTables)
/*******************************************************************************
*
* FUNCTION: AcpiReallocateRootTable
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the
* root list from the previously provided scratch area. Should
* be called once dynamic memory allocation is available in the
* kernel
*
******************************************************************************/
ACPI_STATUS
AcpiReallocateRootTable (
void)
{
ACPI_TABLE_DESC *Tables;
ACPI_SIZE NewSize;
ACPI_SIZE CurrentSize;
ACPI_FUNCTION_TRACE (AcpiReallocateRootTable);
/*
* Only reallocate the root table if the host provided a static buffer
* for the table array in the call to AcpiInitializeTables.
*/
if (AcpiGbl_RootTableList.Flags & ACPI_ROOT_ORIGIN_ALLOCATED)
{
return_ACPI_STATUS (AE_SUPPORT);
}
/*
* Get the current size of the root table and add the default
* increment to create the new table size.
*/
CurrentSize = (ACPI_SIZE)
AcpiGbl_RootTableList.CurrentTableCount * sizeof (ACPI_TABLE_DESC);
NewSize = CurrentSize +
(ACPI_ROOT_TABLE_SIZE_INCREMENT * sizeof (ACPI_TABLE_DESC));
/* Create new array and copy the old array */
Tables = ACPI_ALLOCATE_ZEROED (NewSize);
if (!Tables)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
ACPI_MEMCPY (Tables, AcpiGbl_RootTableList.Tables, CurrentSize);
/*
* Update the root table descriptor. The new size will be the current
* number of tables plus the increment, independent of the reserved
* size of the original table list.
*/
AcpiGbl_RootTableList.Tables = Tables;
AcpiGbl_RootTableList.MaxTableCount =
AcpiGbl_RootTableList.CurrentTableCount + ACPI_ROOT_TABLE_SIZE_INCREMENT;
AcpiGbl_RootTableList.Flags =
ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE;
return_ACPI_STATUS (AE_OK);
}
ACPI_EXPORT_SYMBOL (AcpiReallocateRootTable)
/*******************************************************************************
*
* FUNCTION: AcpiGetTableHeader
*
* PARAMETERS: Signature - ACPI signature of needed table
* Instance - Which instance (for SSDTs)
* OutTableHeader - The pointer to the table header to fill
*
* RETURN: Status and pointer to mapped table header
*
* DESCRIPTION: Finds an ACPI table header.
*
* NOTE: Caller is responsible in unmapping the header with
* AcpiOsUnmapMemory
*
******************************************************************************/
ACPI_STATUS
AcpiGetTableHeader (
char *Signature,
UINT32 Instance,
ACPI_TABLE_HEADER *OutTableHeader)
{
UINT32 i;
UINT32 j;
ACPI_TABLE_HEADER *Header;
/* Parameter validation */
if (!Signature || !OutTableHeader)
{
return (AE_BAD_PARAMETER);
}
/* Walk the root table list */
for (i = 0, j = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
{
if (!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
Signature))
{
continue;
}
if (++j < Instance)
{
continue;
}
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
if ((AcpiGbl_RootTableList.Tables[i].Flags &
ACPI_TABLE_ORIGIN_MASK) ==
ACPI_TABLE_ORIGIN_MAPPED)
{
Header = AcpiOsMapMemory (
AcpiGbl_RootTableList.Tables[i].Address,
sizeof (ACPI_TABLE_HEADER));
if (!Header)
{
return AE_NO_MEMORY;
}
ACPI_MEMCPY (OutTableHeader, Header, sizeof(ACPI_TABLE_HEADER));
AcpiOsUnmapMemory (Header, sizeof(ACPI_TABLE_HEADER));
}
else
{
return AE_NOT_FOUND;
}
}
else
{
ACPI_MEMCPY (OutTableHeader,
AcpiGbl_RootTableList.Tables[i].Pointer,
sizeof(ACPI_TABLE_HEADER));
}
return (AE_OK);
}
return (AE_NOT_FOUND);
}
ACPI_EXPORT_SYMBOL (AcpiGetTableHeader)
/*******************************************************************************
*
* FUNCTION: AcpiGetTable
*
* PARAMETERS: Signature - ACPI signature of needed table
* Instance - Which instance (for SSDTs)
* OutTable - Where the pointer to the table is returned
*
* RETURN: Status and pointer to table
*
* DESCRIPTION: Finds and verifies an ACPI table.
*
******************************************************************************/
ACPI_STATUS
AcpiGetTable (
char *Signature,
UINT32 Instance,
ACPI_TABLE_HEADER **OutTable)
{
UINT32 i;
UINT32 j;
ACPI_STATUS Status;
/* Parameter validation */
if (!Signature || !OutTable)
{
return (AE_BAD_PARAMETER);
}
/* Walk the root table list */
for (i = 0, j = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
{
if (!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
Signature))
{
continue;
}
if (++j < Instance)
{
continue;
}
Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_SUCCESS (Status))
{
*OutTable = AcpiGbl_RootTableList.Tables[i].Pointer;
}
return (Status);
}
return (AE_NOT_FOUND);
}
ACPI_EXPORT_SYMBOL (AcpiGetTable)
/*******************************************************************************
*
* FUNCTION: AcpiGetTableByIndex
*
* PARAMETERS: TableIndex - Table index
* Table - Where the pointer to the table is returned
*
* RETURN: Status and pointer to the table
*
* DESCRIPTION: Obtain a table by an index into the global table list.
*
******************************************************************************/
ACPI_STATUS
AcpiGetTableByIndex (
UINT32 TableIndex,
ACPI_TABLE_HEADER **Table)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiGetTableByIndex);
/* Parameter validation */
if (!Table)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Validate index */
if (TableIndex >= AcpiGbl_RootTableList.CurrentTableCount)
{
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (!AcpiGbl_RootTableList.Tables[TableIndex].Pointer)
{
/* Table is not mapped, map it */
Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[TableIndex]);
if (ACPI_FAILURE (Status))
{
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
}
*Table = AcpiGbl_RootTableList.Tables[TableIndex].Pointer;
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (AE_OK);
}
ACPI_EXPORT_SYMBOL (AcpiGetTableByIndex)
/*******************************************************************************
*
* FUNCTION: AcpiTbLoadNamespace
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
* the RSDT/XSDT.
*
******************************************************************************/
static ACPI_STATUS
AcpiTbLoadNamespace (
void)
{
ACPI_STATUS Status;
UINT32 i;
ACPI_TABLE_HEADER *NewDsdt;
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.
*/
if (!AcpiGbl_RootTableList.CurrentTableCount ||
!ACPI_COMPARE_NAME (
&(AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Signature),
ACPI_SIG_DSDT) ||
ACPI_FAILURE (AcpiTbVerifyTable (
&AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT])))
{
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 AcpiTbVerifyTable.
*/
AcpiGbl_DSDT = AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].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 (ACPI_TABLE_INDEX_DSDT);
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.
*/
ACPI_MEMCPY (&AcpiGbl_OriginalDsdtHeader, AcpiGbl_DSDT,
sizeof (ACPI_TABLE_HEADER));
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
/* Load and parse tables */
Status = AcpiNsLoadTable (ACPI_TABLE_INDEX_DSDT, AcpiGbl_RootNode);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
for (i = 2; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
if ((!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
ACPI_SIG_SSDT) &&
!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
ACPI_SIG_PSDT)) ||
ACPI_FAILURE (AcpiTbVerifyTable (
&AcpiGbl_RootTableList.Tables[i])))
{
continue;
}
/* Skip SSDT when DSDT is overriden */
if (ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
ACPI_SIG_SSDT) &&
(AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Flags &
ACPI_TABLE_ORIGIN_OVERRIDE))
{
continue;
}
/* Ignore errors while loading tables, get as many as possible */
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
(void) AcpiNsLoadTable (i, AcpiGbl_RootNode);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI Tables successfully acquired\n"));
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiLoadTables
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
*
******************************************************************************/
ACPI_STATUS
AcpiLoadTables (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiLoadTables);
/* Load the namespace from the tables */
Status = AcpiTbLoadNamespace ();
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"While loading namespace from ACPI tables"));
}
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiLoadTables)
/*******************************************************************************
*
* FUNCTION: AcpiInstallTableHandler
*
* PARAMETERS: Handler - Table event handler
* Context - Value passed to the handler on each event
*
* RETURN: Status
*
* DESCRIPTION: Install table event handler
*
******************************************************************************/
ACPI_STATUS
AcpiInstallTableHandler (
ACPI_TABLE_HANDLER Handler,
void *Context)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiInstallTableHandler);
if (!Handler)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Don't allow more than one handler */
if (AcpiGbl_TableHandler)
{
Status = AE_ALREADY_EXISTS;
goto Cleanup;
}
/* Install the handler */
AcpiGbl_TableHandler = Handler;
AcpiGbl_TableHandlerContext = Context;
Cleanup:
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiInstallTableHandler)
/*******************************************************************************
*
* FUNCTION: AcpiRemoveTableHandler
*
* PARAMETERS: Handler - Table event handler that was installed
* previously.
*
* RETURN: Status
*
* DESCRIPTION: Remove table event handler
*
******************************************************************************/
ACPI_STATUS
AcpiRemoveTableHandler (
ACPI_TABLE_HANDLER Handler)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiRemoveTableHandler);
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Make sure that the installed handler is the same */
if (!Handler ||
Handler != AcpiGbl_TableHandler)
{
Status = AE_BAD_PARAMETER;
goto Cleanup;
}
/* Remove the handler */
AcpiGbl_TableHandler = NULL;
Cleanup:
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiRemoveTableHandler)