| /****************************************************************************** |
| * |
| * Module Name: tbxface - ACPI table-oriented external interfaces |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2016, 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 "actables.h" |
| |
| #define _COMPONENT ACPI_TABLES |
| ACPI_MODULE_NAME ("tbxface") |
| |
| |
| /******************************************************************************* |
| * |
| * 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 |
| * AllowResize - 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); |
| |
| |
| /* |
| * Setup the Root Table Array and 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 */ |
| |
| 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_INIT (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_STATUS Status; |
| |
| |
| 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); |
| } |
| |
| AcpiGbl_RootTableList.Flags |= ACPI_ROOT_ALLOW_RESIZE; |
| |
| Status = AcpiTbResizeRootTableList (); |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL_INIT (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_INTERNAL_PHYSICAL) |
| { |
| Header = AcpiOsMapMemory ( |
| AcpiGbl_RootTableList.Tables[i].Address, |
| sizeof (ACPI_TABLE_HEADER)); |
| if (!Header) |
| { |
| return (AE_NO_MEMORY); |
| } |
| |
| memcpy (OutTableHeader, Header, sizeof (ACPI_TABLE_HEADER)); |
| AcpiOsUnmapMemory (Header, sizeof (ACPI_TABLE_HEADER)); |
| } |
| else |
| { |
| return (AE_NOT_FOUND); |
| } |
| } |
| else |
| { |
| 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 the requested table |
| * |
| * DESCRIPTION: Finds and verifies an ACPI table. Table must be in the |
| * RSDT/XSDT. |
| * |
| ******************************************************************************/ |
| |
| 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 = AcpiTbValidateTable (&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 requested table |
| * |
| * DESCRIPTION: Obtain a table by an index into the global table list. Used |
| * internally also. |
| * |
| ******************************************************************************/ |
| |
| 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 = AcpiTbValidateTable ( |
| &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: AcpiInstallTableHandler |
| * |
| * PARAMETERS: Handler - Table event handler |
| * Context - Value passed to the handler on each event |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Install a global 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 a 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) |
