tbxface.c revision 26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0
/******************************************************************************
*
* 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 "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbxface")
/* Local prototypes */
static ACPI_STATUS
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.
*
******************************************************************************/
{
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
*
*
* 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.
*
******************************************************************************/
{
/*
* Set up the Root Table Array
* Allocate the table array if requested
*/
if (!InitialTableArray)
{
if (ACPI_FAILURE (Status))
{
}
}
else
{
/* Root Table Array has been statically allocated by the host */
if (AllowResize)
{
}
}
/* Get the address of the RSDP */
if (!RsdpAddress)
{
}
/*
* Get the root table (RSDT or XSDT) and extract all entries to the local
* in a common, more useable format.
*/
}
/*******************************************************************************
*
* 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
*
******************************************************************************/
void)
{
/*
* Only reallocate the root table if the host provided a static buffer
* for the table array in the call to AcpiInitializeTables.
*/
{
}
/*
* Get the current size of the root table and add the default
* increment to create the new table size.
*/
CurrentSize = (ACPI_SIZE)
NewSize = CurrentSize +
(ACPI_ROOT_TABLE_SIZE_INCREMENT * sizeof (ACPI_TABLE_DESC));
/* Create new array and copy the old array */
if (!Tables)
{
}
/*
* 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.
*/
}
/*******************************************************************************
*
* 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
*
******************************************************************************/
char *Signature,
{
UINT32 i;
UINT32 j;
/* Parameter validation */
if (!Signature || !OutTableHeader)
{
return (AE_BAD_PARAMETER);
}
/* Walk the root table list */
for (i = 0, j = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
{
{
continue;
}
if (++j < Instance)
{
continue;
}
{
{
sizeof (ACPI_TABLE_HEADER));
if (!Header)
{
return AE_NO_MEMORY;
}
}
else
{
return AE_NOT_FOUND;
}
}
else
{
sizeof(ACPI_TABLE_HEADER));
}
return (AE_OK);
}
return (AE_NOT_FOUND);
}
/*******************************************************************************
*
* 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.
*
******************************************************************************/
char *Signature,
{
UINT32 i;
UINT32 j;
/* Parameter validation */
{
return (AE_BAD_PARAMETER);
}
/* Walk the root table list */
for (i = 0, j = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
{
{
continue;
}
if (++j < Instance)
{
continue;
}
if (ACPI_SUCCESS (Status))
{
}
return (Status);
}
return (AE_NOT_FOUND);
}
/*******************************************************************************
*
* 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.
*
******************************************************************************/
{
/* Parameter validation */
if (!Table)
{
}
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Validate index */
{
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
}
{
/* Table is not mapped, map it */
if (ACPI_FAILURE (Status))
{
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
}
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbLoadNamespace
*
* PARAMETERS: None
*
* RETURN: Status
*
*
******************************************************************************/
static ACPI_STATUS
void)
{
UINT32 i;
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/*
* Load the namespace. The DSDT is required, but any SSDT and
* PSDT tables are optional. Verify the DSDT.
*/
ACPI_SIG_DSDT) ||
{
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.
*/
/*
* 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 (NewDsdt)
{
}
}
/*
* Save the original DSDT header for detection of table corruption
*/
sizeof (ACPI_TABLE_HEADER));
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
/* Load and parse tables */
if (ACPI_FAILURE (Status))
{
}
/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
ACPI_SIG_SSDT) &&
ACPI_SIG_PSDT)) ||
&AcpiGbl_RootTableList.Tables[i])))
{
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);
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
}
/*******************************************************************************
*
* FUNCTION: AcpiLoadTables
*
* PARAMETERS: None
*
* RETURN: Status
*
*
******************************************************************************/
void)
{
/* Load the namespace from the tables */
Status = AcpiTbLoadNamespace ();
if (ACPI_FAILURE (Status))
{
"While loading namespace from ACPI tables"));
}
}
/*******************************************************************************
*
* FUNCTION: AcpiInstallTableHandler
*
* PARAMETERS: Handler - Table event handler
* Context - Value passed to the handler on each event
*
* RETURN: Status
*
* DESCRIPTION: Install table event handler
*
******************************************************************************/
void *Context)
{
if (!Handler)
{
}
if (ACPI_FAILURE (Status))
{
}
/* Don't allow more than one handler */
if (AcpiGbl_TableHandler)
{
goto Cleanup;
}
/* Install the handler */
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
}
/*******************************************************************************
*
* FUNCTION: AcpiRemoveTableHandler
*
* PARAMETERS: Handler - Table event handler that was installed
* previously.
*
* RETURN: Status
*
* DESCRIPTION: Remove table event handler
*
******************************************************************************/
{
if (ACPI_FAILURE (Status))
{
}
/* Make sure that the installed handler is the same */
if (!Handler ||
{
goto Cleanup;
}
/* Remove the handler */
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
}