nsutils.c revision 99146
167754Smsmith/****************************************************************************** 267754Smsmith * 367754Smsmith * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing 467754Smsmith * parents and siblings and Scope manipulation 599146Siwasaki * $Revision: 105 $ 667754Smsmith * 767754Smsmith *****************************************************************************/ 867754Smsmith 967754Smsmith/****************************************************************************** 1067754Smsmith * 1167754Smsmith * 1. Copyright Notice 1267754Smsmith * 1391116Smsmith * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 1470243Smsmith * All rights reserved. 1567754Smsmith * 1667754Smsmith * 2. License 1767754Smsmith * 1867754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1967754Smsmith * rights. You may have additional license terms from the party that provided 2067754Smsmith * you this software, covering your right to use that party's intellectual 2167754Smsmith * property rights. 2267754Smsmith * 2367754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2467754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2567754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2667754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2767754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2867754Smsmith * Code in any form, with the right to sublicense such rights; and 2967754Smsmith * 3067754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3167754Smsmith * license (with the right to sublicense), under only those claims of Intel 3267754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3367754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3467754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3567754Smsmith * license, and in no event shall the patent license extend to any additions 3667754Smsmith * to or modifications of the Original Intel Code. No other license or right 3767754Smsmith * is granted directly or by implication, estoppel or otherwise; 3867754Smsmith * 3967754Smsmith * The above copyright and patent license is granted only if the following 4067754Smsmith * conditions are met: 4167754Smsmith * 4267754Smsmith * 3. Conditions 4367754Smsmith * 4467754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4567754Smsmith * Redistribution of source code of any substantial portion of the Covered 4667754Smsmith * Code or modification with rights to further distribute source must include 4767754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4867754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4967754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 5067754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5167754Smsmith * Code and the date of any change. Licensee must include in that file the 5267754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5367754Smsmith * must include a prominent statement that the modification is derived, 5467754Smsmith * directly or indirectly, from Original Intel Code. 5567754Smsmith * 5667754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5767754Smsmith * Redistribution of source code of any substantial portion of the Covered 5867754Smsmith * Code or modification without rights to further distribute source must 5967754Smsmith * include the following Disclaimer and Export Compliance provision in the 6067754Smsmith * documentation and/or other materials provided with distribution. In 6167754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6267754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6367754Smsmith * license from Licensee to its licensee is limited to the intellectual 6467754Smsmith * property embodied in the software Licensee provides to its licensee, and 6567754Smsmith * not to intellectual property embodied in modifications its licensee may 6667754Smsmith * make. 6767754Smsmith * 6867754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6967754Smsmith * substantial portion of the Covered Code or modification must reproduce the 7067754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7167754Smsmith * provision in the documentation and/or other materials provided with the 7267754Smsmith * distribution. 7367754Smsmith * 7467754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7567754Smsmith * Intel Code. 7667754Smsmith * 7767754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7867754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7967754Smsmith * other dealings in products derived from or relating to the Covered Code 8067754Smsmith * without prior written authorization from Intel. 8167754Smsmith * 8267754Smsmith * 4. Disclaimer and Export Compliance 8367754Smsmith * 8467754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8567754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8667754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8767754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8867754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8967754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 9067754Smsmith * PARTICULAR PURPOSE. 9167754Smsmith * 9267754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9367754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9467754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9567754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9667754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9767754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9867754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9967754Smsmith * LIMITED REMEDY. 10067754Smsmith * 10167754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10267754Smsmith * software or system incorporating such software without first obtaining any 10367754Smsmith * required license or other approval from the U. S. Department of Commerce or 10467754Smsmith * any other agency or department of the United States Government. In the 10567754Smsmith * event Licensee exports any such software from the United States or 10667754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10767754Smsmith * ensure that the distribution and export/re-export of the software is in 10867754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10967754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 11067754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11167754Smsmith * software, or service, directly or indirectly, to any country for which the 11267754Smsmith * United States government or any agency thereof requires an export license, 11367754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11467754Smsmith * such license, approval or letter. 11567754Smsmith * 11667754Smsmith *****************************************************************************/ 11767754Smsmith 11867754Smsmith#define __NSUTILS_C__ 11967754Smsmith 12067754Smsmith#include "acpi.h" 12167754Smsmith#include "acnamesp.h" 12267754Smsmith#include "acinterp.h" 12367754Smsmith#include "amlcode.h" 12467754Smsmith#include "actables.h" 12567754Smsmith 12677424Smsmith#define _COMPONENT ACPI_NAMESPACE 12791116Smsmith ACPI_MODULE_NAME ("nsutils") 12867754Smsmith 12967754Smsmith 13077424Smsmith/******************************************************************************* 13167754Smsmith * 13267754Smsmith * FUNCTION: AcpiNsValidRootPrefix 13367754Smsmith * 13467754Smsmith * PARAMETERS: Prefix - Character to be checked 13567754Smsmith * 13667754Smsmith * RETURN: TRUE if a valid prefix 13767754Smsmith * 13867754Smsmith * DESCRIPTION: Check if a character is a valid ACPI Root prefix 13967754Smsmith * 14077424Smsmith ******************************************************************************/ 14167754Smsmith 14267754SmsmithBOOLEAN 14367754SmsmithAcpiNsValidRootPrefix ( 14467754Smsmith NATIVE_CHAR Prefix) 14567754Smsmith{ 14667754Smsmith 14767754Smsmith return ((BOOLEAN) (Prefix == '\\')); 14867754Smsmith} 14967754Smsmith 15067754Smsmith 15177424Smsmith/******************************************************************************* 15267754Smsmith * 15367754Smsmith * FUNCTION: AcpiNsValidPathSeparator 15467754Smsmith * 15567754Smsmith * PARAMETERS: Sep - Character to be checked 15667754Smsmith * 15767754Smsmith * RETURN: TRUE if a valid path separator 15867754Smsmith * 15967754Smsmith * DESCRIPTION: Check if a character is a valid ACPI path separator 16067754Smsmith * 16177424Smsmith ******************************************************************************/ 16267754Smsmith 16367754SmsmithBOOLEAN 16467754SmsmithAcpiNsValidPathSeparator ( 16567754Smsmith NATIVE_CHAR Sep) 16667754Smsmith{ 16767754Smsmith 16867754Smsmith return ((BOOLEAN) (Sep == '.')); 16967754Smsmith} 17067754Smsmith 17167754Smsmith 17277424Smsmith/******************************************************************************* 17367754Smsmith * 17467754Smsmith * FUNCTION: AcpiNsGetType 17567754Smsmith * 17667754Smsmith * PARAMETERS: Handle - Parent Node to be examined 17767754Smsmith * 17867754Smsmith * RETURN: Type field from Node whose handle is passed 17967754Smsmith * 18077424Smsmith ******************************************************************************/ 18167754Smsmith 18291116SmsmithACPI_OBJECT_TYPE 18367754SmsmithAcpiNsGetType ( 18477424Smsmith ACPI_NAMESPACE_NODE *Node) 18567754Smsmith{ 18691116Smsmith ACPI_FUNCTION_TRACE ("NsGetType"); 18767754Smsmith 18867754Smsmith 18977424Smsmith if (!Node) 19067754Smsmith { 19191116Smsmith ACPI_REPORT_WARNING (("NsGetType: Null Node ptr")); 19267754Smsmith return_VALUE (ACPI_TYPE_ANY); 19367754Smsmith } 19467754Smsmith 19591116Smsmith return_VALUE ((ACPI_OBJECT_TYPE) Node->Type); 19667754Smsmith} 19767754Smsmith 19867754Smsmith 19977424Smsmith/******************************************************************************* 20067754Smsmith * 20167754Smsmith * FUNCTION: AcpiNsLocal 20267754Smsmith * 20367754Smsmith * PARAMETERS: Type - A namespace object type 20467754Smsmith * 20567754Smsmith * RETURN: LOCAL if names must be found locally in objects of the 20667754Smsmith * passed type, 0 if enclosing scopes should be searched 20767754Smsmith * 20877424Smsmith ******************************************************************************/ 20967754Smsmith 21067754SmsmithUINT32 21167754SmsmithAcpiNsLocal ( 21291116Smsmith ACPI_OBJECT_TYPE Type) 21367754Smsmith{ 21491116Smsmith ACPI_FUNCTION_TRACE ("NsLocal"); 21567754Smsmith 21667754Smsmith 21777424Smsmith if (!AcpiUtValidObjectType (Type)) 21867754Smsmith { 21967754Smsmith /* Type code out of range */ 22067754Smsmith 22191116Smsmith ACPI_REPORT_WARNING (("NsLocal: Invalid Object Type\n")); 22291116Smsmith return_VALUE (ACPI_NS_NORMAL); 22367754Smsmith } 22467754Smsmith 22591116Smsmith return_VALUE ((UINT32) AcpiGbl_NsProperties[Type] & ACPI_NS_LOCAL); 22667754Smsmith} 22767754Smsmith 22867754Smsmith 22977424Smsmith/******************************************************************************* 23067754Smsmith * 23177424Smsmith * FUNCTION: AcpiNsGetInternalNameLength 23267754Smsmith * 23383174Smsmith * PARAMETERS: Info - Info struct initialized with the 23477424Smsmith * external name pointer. 23567754Smsmith * 23667754Smsmith * RETURN: Status 23767754Smsmith * 23883174Smsmith * DESCRIPTION: Calculate the length of the internal (AML) namestring 23977424Smsmith * corresponding to the external (ASL) namestring. 24067754Smsmith * 24177424Smsmith ******************************************************************************/ 24267754Smsmith 24367754SmsmithACPI_STATUS 24477424SmsmithAcpiNsGetInternalNameLength ( 24577424Smsmith ACPI_NAMESTRING_INFO *Info) 24667754Smsmith{ 24777424Smsmith NATIVE_CHAR *NextExternalChar; 24867754Smsmith UINT32 i; 24967754Smsmith 25067754Smsmith 25191116Smsmith ACPI_FUNCTION_ENTRY (); 25283174Smsmith 25383174Smsmith 25477424Smsmith NextExternalChar = Info->ExternalName; 25577424Smsmith Info->NumCarats = 0; 25677424Smsmith Info->NumSegments = 0; 25777424Smsmith Info->FullyQualified = FALSE; 25883174Smsmith 25967754Smsmith /* 26067754Smsmith * For the internal name, the required length is 4 bytes 26167754Smsmith * per segment, plus 1 each for RootPrefix, MultiNamePrefixOp, 26267754Smsmith * segment count, trailing null (which is not really needed, 26367754Smsmith * but no there's harm in putting it there) 26467754Smsmith * 26567754Smsmith * strlen() + 1 covers the first NameSeg, which has no 26667754Smsmith * path separator 26767754Smsmith */ 26877424Smsmith if (AcpiNsValidRootPrefix (NextExternalChar[0])) 26967754Smsmith { 27077424Smsmith Info->FullyQualified = TRUE; 27177424Smsmith NextExternalChar++; 27267754Smsmith } 27369450Smsmith else 27469450Smsmith { 27569450Smsmith /* 27669450Smsmith * Handle Carat prefixes 27769450Smsmith */ 27877424Smsmith while (*NextExternalChar == '^') 27969450Smsmith { 28077424Smsmith Info->NumCarats++; 28177424Smsmith NextExternalChar++; 28269450Smsmith } 28369450Smsmith } 28469450Smsmith 28567754Smsmith /* 28667754Smsmith * Determine the number of ACPI name "segments" by counting 28767754Smsmith * the number of path separators within the string. Start 28867754Smsmith * with one segment since the segment count is (# separators) 28967754Smsmith * + 1, and zero separators is ok. 29067754Smsmith */ 29177424Smsmith if (*NextExternalChar) 29267754Smsmith { 29377424Smsmith Info->NumSegments = 1; 29477424Smsmith for (i = 0; NextExternalChar[i]; i++) 29567754Smsmith { 29677424Smsmith if (AcpiNsValidPathSeparator (NextExternalChar[i])) 29769450Smsmith { 29877424Smsmith Info->NumSegments++; 29969450Smsmith } 30067754Smsmith } 30167754Smsmith } 30267754Smsmith 30383174Smsmith Info->Length = (ACPI_NAME_SIZE * Info->NumSegments) + 30477424Smsmith 4 + Info->NumCarats; 30567754Smsmith 30677424Smsmith Info->NextExternalChar = NextExternalChar; 30767754Smsmith 30877424Smsmith return (AE_OK); 30977424Smsmith} 31067754Smsmith 31167754Smsmith 31277424Smsmith/******************************************************************************* 31377424Smsmith * 31477424Smsmith * FUNCTION: AcpiNsBuildInternalName 31577424Smsmith * 31677424Smsmith * PARAMETERS: Info - Info struct fully initialized 31777424Smsmith * 31877424Smsmith * RETURN: Status 31977424Smsmith * 32083174Smsmith * DESCRIPTION: Construct the internal (AML) namestring 32177424Smsmith * corresponding to the external (ASL) namestring. 32277424Smsmith * 32377424Smsmith ******************************************************************************/ 32477424Smsmith 32577424SmsmithACPI_STATUS 32677424SmsmithAcpiNsBuildInternalName ( 32777424Smsmith ACPI_NAMESTRING_INFO *Info) 32877424Smsmith{ 32977424Smsmith UINT32 NumSegments = Info->NumSegments; 33077424Smsmith NATIVE_CHAR *InternalName = Info->InternalName; 33177424Smsmith NATIVE_CHAR *ExternalName = Info->NextExternalChar; 33277424Smsmith NATIVE_CHAR *Result = NULL; 33377424Smsmith UINT32 i; 33477424Smsmith 33577424Smsmith 33691116Smsmith ACPI_FUNCTION_TRACE ("NsBuildInternalName"); 33777424Smsmith 33883174Smsmith 33967754Smsmith /* Setup the correct prefixes, counts, and pointers */ 34067754Smsmith 34177424Smsmith if (Info->FullyQualified) 34267754Smsmith { 34367754Smsmith InternalName[0] = '\\'; 34469450Smsmith 34569450Smsmith if (NumSegments <= 1) 34669450Smsmith { 34769450Smsmith Result = &InternalName[1]; 34869450Smsmith } 34969450Smsmith else if (NumSegments == 2) 35069450Smsmith { 35169450Smsmith InternalName[1] = AML_DUAL_NAME_PREFIX; 35269450Smsmith Result = &InternalName[2]; 35369450Smsmith } 35469450Smsmith else 35569450Smsmith { 35669450Smsmith InternalName[1] = AML_MULTI_NAME_PREFIX_OP; 35769450Smsmith InternalName[2] = (char) NumSegments; 35869450Smsmith Result = &InternalName[3]; 35969450Smsmith } 36067754Smsmith } 36167754Smsmith else 36267754Smsmith { 36369450Smsmith /* 36469450Smsmith * Not fully qualified. 36569450Smsmith * Handle Carats first, then append the name segments 36669450Smsmith */ 36769450Smsmith i = 0; 36877424Smsmith if (Info->NumCarats) 36969450Smsmith { 37077424Smsmith for (i = 0; i < Info->NumCarats; i++) 37169450Smsmith { 37269450Smsmith InternalName[i] = '^'; 37369450Smsmith } 37469450Smsmith } 37569450Smsmith 37691116Smsmith if (NumSegments <= 1) 37769450Smsmith { 37869450Smsmith Result = &InternalName[i]; 37969450Smsmith } 38069450Smsmith else if (NumSegments == 2) 38169450Smsmith { 38269450Smsmith InternalName[i] = AML_DUAL_NAME_PREFIX; 38369450Smsmith Result = &InternalName[i+1]; 38469450Smsmith } 38569450Smsmith else 38669450Smsmith { 38769450Smsmith InternalName[i] = AML_MULTI_NAME_PREFIX_OP; 38869450Smsmith InternalName[i+1] = (char) NumSegments; 38969450Smsmith Result = &InternalName[i+2]; 39069450Smsmith } 39167754Smsmith } 39267754Smsmith 39367754Smsmith /* Build the name (minus path separators) */ 39467754Smsmith 39567754Smsmith for (; NumSegments; NumSegments--) 39667754Smsmith { 39767754Smsmith for (i = 0; i < ACPI_NAME_SIZE; i++) 39867754Smsmith { 39967754Smsmith if (AcpiNsValidPathSeparator (*ExternalName) || 40067754Smsmith (*ExternalName == 0)) 40167754Smsmith { 40277424Smsmith /* Pad the segment with underscore(s) if segment is short */ 40367754Smsmith 40467754Smsmith Result[i] = '_'; 40567754Smsmith } 40667754Smsmith else 40767754Smsmith { 40877424Smsmith /* Convert the character to uppercase and save it */ 40967754Smsmith 41091116Smsmith Result[i] = (char) ACPI_TOUPPER (*ExternalName); 41167754Smsmith ExternalName++; 41267754Smsmith } 41367754Smsmith } 41467754Smsmith 41567754Smsmith /* Now we must have a path separator, or the pathname is bad */ 41667754Smsmith 41767754Smsmith if (!AcpiNsValidPathSeparator (*ExternalName) && 41867754Smsmith (*ExternalName != 0)) 41967754Smsmith { 42067754Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 42167754Smsmith } 42267754Smsmith 42367754Smsmith /* Move on the next segment */ 42467754Smsmith 42567754Smsmith ExternalName++; 42667754Smsmith Result += ACPI_NAME_SIZE; 42767754Smsmith } 42867754Smsmith 42977424Smsmith /* Terminate the string */ 43067754Smsmith 43167754Smsmith *Result = 0; 43267754Smsmith 43377424Smsmith if (Info->FullyQualified) 43467754Smsmith { 43582367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "returning [%p] (abs) \"\\%s\"\n", 43699146Siwasaki InternalName, InternalName)); 43767754Smsmith } 43867754Smsmith else 43967754Smsmith { 44082367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "returning [%p] (rel) \"%s\"\n", 44199146Siwasaki InternalName, InternalName)); 44267754Smsmith } 44367754Smsmith 44467754Smsmith return_ACPI_STATUS (AE_OK); 44567754Smsmith} 44667754Smsmith 44767754Smsmith 44877424Smsmith/******************************************************************************* 44967754Smsmith * 45077424Smsmith * FUNCTION: AcpiNsInternalizeName 45177424Smsmith * 45277424Smsmith * PARAMETERS: *ExternalName - External representation of name 45377424Smsmith * **Converted Name - Where to return the resulting 45477424Smsmith * internal represention of the name 45577424Smsmith * 45677424Smsmith * RETURN: Status 45777424Smsmith * 45877424Smsmith * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") 45977424Smsmith * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 46077424Smsmith * 46177424Smsmith *******************************************************************************/ 46277424Smsmith 46377424SmsmithACPI_STATUS 46477424SmsmithAcpiNsInternalizeName ( 46577424Smsmith NATIVE_CHAR *ExternalName, 46677424Smsmith NATIVE_CHAR **ConvertedName) 46777424Smsmith{ 46877424Smsmith NATIVE_CHAR *InternalName; 46977424Smsmith ACPI_NAMESTRING_INFO Info; 47077424Smsmith ACPI_STATUS Status; 47177424Smsmith 47277424Smsmith 47391116Smsmith ACPI_FUNCTION_TRACE ("NsInternalizeName"); 47477424Smsmith 47577424Smsmith 47677424Smsmith if ((!ExternalName) || 47777424Smsmith (*ExternalName == 0) || 47877424Smsmith (!ConvertedName)) 47977424Smsmith { 48077424Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 48177424Smsmith } 48277424Smsmith 48377424Smsmith /* Get the length of the new internal name */ 48477424Smsmith 48577424Smsmith Info.ExternalName = ExternalName; 48677424Smsmith AcpiNsGetInternalNameLength (&Info); 48777424Smsmith 48877424Smsmith /* We need a segment to store the internal name */ 48977424Smsmith 49080062Smsmith InternalName = ACPI_MEM_CALLOCATE (Info.Length); 49177424Smsmith if (!InternalName) 49277424Smsmith { 49377424Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 49477424Smsmith } 49577424Smsmith 49677424Smsmith /* Build the name */ 49777424Smsmith 49877424Smsmith Info.InternalName = InternalName; 49977424Smsmith Status = AcpiNsBuildInternalName (&Info); 50077424Smsmith if (ACPI_FAILURE (Status)) 50177424Smsmith { 50280062Smsmith ACPI_MEM_FREE (InternalName); 50377424Smsmith return_ACPI_STATUS (Status); 50477424Smsmith } 50577424Smsmith 50677424Smsmith *ConvertedName = InternalName; 50777424Smsmith return_ACPI_STATUS (AE_OK); 50877424Smsmith} 50977424Smsmith 51077424Smsmith 51177424Smsmith/******************************************************************************* 51277424Smsmith * 51367754Smsmith * FUNCTION: AcpiNsExternalizeName 51467754Smsmith * 51567754Smsmith * PARAMETERS: *InternalName - Internal representation of name 51667754Smsmith * **ConvertedName - Where to return the resulting 51777424Smsmith * external representation of name 51867754Smsmith * 51967754Smsmith * RETURN: Status 52067754Smsmith * 52167754Smsmith * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 52267754Smsmith * to its external form (e.g. "\_PR_.CPU0") 52367754Smsmith * 52477424Smsmith ******************************************************************************/ 52567754Smsmith 52667754SmsmithACPI_STATUS 52767754SmsmithAcpiNsExternalizeName ( 52867754Smsmith UINT32 InternalNameLength, 52967754Smsmith char *InternalName, 53067754Smsmith UINT32 *ConvertedNameLength, 53167754Smsmith char **ConvertedName) 53267754Smsmith{ 53367754Smsmith UINT32 PrefixLength = 0; 53467754Smsmith UINT32 NamesIndex = 0; 53591116Smsmith UINT32 NumSegments = 0; 53667754Smsmith UINT32 i = 0; 53767754Smsmith UINT32 j = 0; 53891116Smsmith UINT32 RequiredLength; 53967754Smsmith 54067754Smsmith 54191116Smsmith ACPI_FUNCTION_TRACE ("NsExternalizeName"); 54267754Smsmith 54367754Smsmith 54467754Smsmith if (!InternalNameLength || 54567754Smsmith !InternalName || 54667754Smsmith !ConvertedName) 54767754Smsmith { 54867754Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 54967754Smsmith } 55067754Smsmith 55167754Smsmith /* 55267754Smsmith * Check for a prefix (one '\' | one or more '^'). 55367754Smsmith */ 55467754Smsmith switch (InternalName[0]) 55567754Smsmith { 55667754Smsmith case '\\': 55767754Smsmith PrefixLength = 1; 55867754Smsmith break; 55967754Smsmith 56067754Smsmith case '^': 56167754Smsmith for (i = 0; i < InternalNameLength; i++) 56267754Smsmith { 56367754Smsmith if (InternalName[i] != '^') 56467754Smsmith { 56567754Smsmith PrefixLength = i + 1; 56667754Smsmith } 56767754Smsmith } 56867754Smsmith 56967754Smsmith if (i == InternalNameLength) 57067754Smsmith { 57167754Smsmith PrefixLength = i; 57267754Smsmith } 57367754Smsmith 57467754Smsmith break; 57567754Smsmith } 57667754Smsmith 57767754Smsmith /* 57867754Smsmith * Check for object names. Note that there could be 0-255 of these 57967754Smsmith * 4-byte elements. 58067754Smsmith */ 58167754Smsmith if (PrefixLength < InternalNameLength) 58267754Smsmith { 58367754Smsmith switch (InternalName[PrefixLength]) 58467754Smsmith { 58591116Smsmith case AML_MULTI_NAME_PREFIX_OP: 58667754Smsmith 58791116Smsmith /* <count> 4-byte names */ 58867754Smsmith 58967754Smsmith NamesIndex = PrefixLength + 2; 59091116Smsmith NumSegments = (UINT32) (UINT8) InternalName[PrefixLength + 1]; 59167754Smsmith break; 59267754Smsmith 59391116Smsmith case AML_DUAL_NAME_PREFIX: 59467754Smsmith 59591116Smsmith /* Two 4-byte names */ 59667754Smsmith 59767754Smsmith NamesIndex = PrefixLength + 1; 59891116Smsmith NumSegments = 2; 59967754Smsmith break; 60067754Smsmith 60191116Smsmith case 0: 60267754Smsmith 60391116Smsmith /* NullName */ 60467754Smsmith 60567754Smsmith NamesIndex = 0; 60691116Smsmith NumSegments = 0; 60767754Smsmith break; 60867754Smsmith 60991116Smsmith default: 61067754Smsmith 61191116Smsmith /* one 4-byte name */ 61267754Smsmith 61367754Smsmith NamesIndex = PrefixLength; 61491116Smsmith NumSegments = 1; 61567754Smsmith break; 61667754Smsmith } 61767754Smsmith } 61867754Smsmith 61967754Smsmith /* 62067754Smsmith * Calculate the length of ConvertedName, which equals the length 62167754Smsmith * of the prefix, length of all object names, length of any required 62267754Smsmith * punctuation ('.') between object names, plus the NULL terminator. 62367754Smsmith */ 62491116Smsmith RequiredLength = PrefixLength + (4 * NumSegments) + 62591116Smsmith ((NumSegments > 0) ? (NumSegments - 1) : 0) + 1; 62667754Smsmith 62767754Smsmith /* 62867754Smsmith * Check to see if we're still in bounds. If not, there's a problem 62967754Smsmith * with InternalName (invalid format). 63067754Smsmith */ 63191116Smsmith if (RequiredLength > InternalNameLength) 63267754Smsmith { 63391116Smsmith ACPI_REPORT_ERROR (("NsExternalizeName: Invalid internal name\n")); 63467754Smsmith return_ACPI_STATUS (AE_BAD_PATHNAME); 63567754Smsmith } 63667754Smsmith 63767754Smsmith /* 63867754Smsmith * Build ConvertedName... 63967754Smsmith */ 64091116Smsmith *ConvertedName = ACPI_MEM_CALLOCATE (RequiredLength); 64167754Smsmith if (!(*ConvertedName)) 64267754Smsmith { 64367754Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 64467754Smsmith } 64567754Smsmith 64667754Smsmith j = 0; 64767754Smsmith 64867754Smsmith for (i = 0; i < PrefixLength; i++) 64967754Smsmith { 65067754Smsmith (*ConvertedName)[j++] = InternalName[i]; 65167754Smsmith } 65267754Smsmith 65391116Smsmith if (NumSegments > 0) 65467754Smsmith { 65591116Smsmith for (i = 0; i < NumSegments; i++) 65667754Smsmith { 65767754Smsmith if (i > 0) 65867754Smsmith { 65967754Smsmith (*ConvertedName)[j++] = '.'; 66067754Smsmith } 66167754Smsmith 66267754Smsmith (*ConvertedName)[j++] = InternalName[NamesIndex++]; 66367754Smsmith (*ConvertedName)[j++] = InternalName[NamesIndex++]; 66467754Smsmith (*ConvertedName)[j++] = InternalName[NamesIndex++]; 66567754Smsmith (*ConvertedName)[j++] = InternalName[NamesIndex++]; 66667754Smsmith } 66767754Smsmith } 66867754Smsmith 66991116Smsmith if (ConvertedNameLength) 67091116Smsmith { 67191116Smsmith *ConvertedNameLength = RequiredLength; 67291116Smsmith } 67391116Smsmith 67467754Smsmith return_ACPI_STATUS (AE_OK); 67567754Smsmith} 67667754Smsmith 67767754Smsmith 67877424Smsmith/******************************************************************************* 67967754Smsmith * 68085756Smsmith * FUNCTION: AcpiNsMapHandleToNode 68167754Smsmith * 68267754Smsmith * PARAMETERS: Handle - Handle to be converted to an Node 68367754Smsmith * 68467754Smsmith * RETURN: A Name table entry pointer 68567754Smsmith * 68667754Smsmith * DESCRIPTION: Convert a namespace handle to a real Node 68767754Smsmith * 68887031Smsmith * Note: Real integer handles allow for more verification 68987031Smsmith * and keep all pointers within this subsystem. 69087031Smsmith * 69177424Smsmith ******************************************************************************/ 69267754Smsmith 69367754SmsmithACPI_NAMESPACE_NODE * 69485756SmsmithAcpiNsMapHandleToNode ( 69567754Smsmith ACPI_HANDLE Handle) 69667754Smsmith{ 69767754Smsmith 69891116Smsmith ACPI_FUNCTION_ENTRY (); 69983174Smsmith 70083174Smsmith 70167754Smsmith /* 70287031Smsmith * Simple implementation. 70367754Smsmith */ 70467754Smsmith if (!Handle) 70567754Smsmith { 70667754Smsmith return (NULL); 70767754Smsmith } 70867754Smsmith 70967754Smsmith if (Handle == ACPI_ROOT_OBJECT) 71067754Smsmith { 71167754Smsmith return (AcpiGbl_RootNode); 71267754Smsmith } 71367754Smsmith 71467754Smsmith /* We can at least attempt to verify the handle */ 71567754Smsmith 71691116Smsmith if (ACPI_GET_DESCRIPTOR_TYPE (Handle) != ACPI_DESC_TYPE_NAMED) 71767754Smsmith { 71867754Smsmith return (NULL); 71967754Smsmith } 72067754Smsmith 72167754Smsmith return ((ACPI_NAMESPACE_NODE *) Handle); 72267754Smsmith} 72367754Smsmith 72467754Smsmith 72577424Smsmith/******************************************************************************* 72667754Smsmith * 72767754Smsmith * FUNCTION: AcpiNsConvertEntryToHandle 72867754Smsmith * 72967754Smsmith * PARAMETERS: Node - Node to be converted to a Handle 73067754Smsmith * 73167754Smsmith * RETURN: An USER ACPI_HANDLE 73267754Smsmith * 73367754Smsmith * DESCRIPTION: Convert a real Node to a namespace handle 73467754Smsmith * 73577424Smsmith ******************************************************************************/ 73667754Smsmith 73767754SmsmithACPI_HANDLE 73867754SmsmithAcpiNsConvertEntryToHandle ( 73967754Smsmith ACPI_NAMESPACE_NODE *Node) 74067754Smsmith{ 74167754Smsmith 74267754Smsmith 74367754Smsmith /* 74467754Smsmith * Simple implementation for now; 74567754Smsmith */ 74667754Smsmith return ((ACPI_HANDLE) Node); 74767754Smsmith 74867754Smsmith 74967754Smsmith/* --------------------------------------------------- 75067754Smsmith 75167754Smsmith if (!Node) 75267754Smsmith { 75367754Smsmith return (NULL); 75467754Smsmith } 75567754Smsmith 75667754Smsmith if (Node == AcpiGbl_RootNode) 75767754Smsmith { 75867754Smsmith return (ACPI_ROOT_OBJECT); 75967754Smsmith } 76067754Smsmith 76167754Smsmith 76267754Smsmith return ((ACPI_HANDLE) Node); 76367754Smsmith------------------------------------------------------*/ 76467754Smsmith} 76567754Smsmith 76667754Smsmith 76777424Smsmith/******************************************************************************* 76867754Smsmith * 76967754Smsmith * FUNCTION: AcpiNsTerminate 77067754Smsmith * 77167754Smsmith * PARAMETERS: none 77267754Smsmith * 77367754Smsmith * RETURN: none 77467754Smsmith * 77567754Smsmith * DESCRIPTION: free memory allocated for table storage. 77667754Smsmith * 77767754Smsmith ******************************************************************************/ 77867754Smsmith 77967754Smsmithvoid 78067754SmsmithAcpiNsTerminate (void) 78167754Smsmith{ 78267754Smsmith ACPI_OPERAND_OBJECT *ObjDesc; 78367754Smsmith ACPI_NAMESPACE_NODE *ThisNode; 78467754Smsmith 78567754Smsmith 78691116Smsmith ACPI_FUNCTION_TRACE ("NsTerminate"); 78767754Smsmith 78867754Smsmith 78967754Smsmith ThisNode = AcpiGbl_RootNode; 79067754Smsmith 79167754Smsmith /* 79267754Smsmith * 1) Free the entire namespace -- all objects, tables, and stacks 79377424Smsmith * 79467754Smsmith * Delete all objects linked to the root 79567754Smsmith * (additional table descriptors) 79667754Smsmith */ 79767754Smsmith AcpiNsDeleteNamespaceSubtree (ThisNode); 79867754Smsmith 79967754Smsmith /* Detach any object(s) attached to the root */ 80067754Smsmith 80167754Smsmith ObjDesc = AcpiNsGetAttachedObject (ThisNode); 80267754Smsmith if (ObjDesc) 80367754Smsmith { 80467754Smsmith AcpiNsDetachObject (ThisNode); 80577424Smsmith AcpiUtRemoveReference (ObjDesc); 80667754Smsmith } 80767754Smsmith 80867754Smsmith AcpiNsDeleteChildren (ThisNode); 80982367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n")); 81067754Smsmith 81167754Smsmith 81267754Smsmith /* 81367754Smsmith * 2) Now we can delete the ACPI tables 81467754Smsmith */ 81567754Smsmith AcpiTbDeleteAcpiTables (); 81682367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ACPI Tables freed\n")); 81767754Smsmith 81867754Smsmith return_VOID; 81967754Smsmith} 82067754Smsmith 82167754Smsmith 82277424Smsmith/******************************************************************************* 82367754Smsmith * 82467754Smsmith * FUNCTION: AcpiNsOpensScope 82567754Smsmith * 82667754Smsmith * PARAMETERS: Type - A valid namespace type 82767754Smsmith * 82867754Smsmith * RETURN: NEWSCOPE if the passed type "opens a name scope" according 82967754Smsmith * to the ACPI specification, else 0 83067754Smsmith * 83177424Smsmith ******************************************************************************/ 83267754Smsmith 83367754SmsmithUINT32 83467754SmsmithAcpiNsOpensScope ( 83591116Smsmith ACPI_OBJECT_TYPE Type) 83667754Smsmith{ 83791116Smsmith ACPI_FUNCTION_TRACE_U32 ("NsOpensScope", Type); 83867754Smsmith 83967754Smsmith 84077424Smsmith if (!AcpiUtValidObjectType (Type)) 84167754Smsmith { 84267754Smsmith /* type code out of range */ 84367754Smsmith 84491116Smsmith ACPI_REPORT_WARNING (("NsOpensScope: Invalid Object Type %X\n", Type)); 84591116Smsmith return_VALUE (ACPI_NS_NORMAL); 84667754Smsmith } 84767754Smsmith 84891116Smsmith return_VALUE (((UINT32) AcpiGbl_NsProperties[Type]) & ACPI_NS_NEWSCOPE); 84967754Smsmith} 85067754Smsmith 85167754Smsmith 85277424Smsmith/******************************************************************************* 85367754Smsmith * 85491116Smsmith * FUNCTION: AcpiNsGetNodeByPath 85567754Smsmith * 85667754Smsmith * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The 85767754Smsmith * \ (backslash) and ^ (carat) prefixes, and the 85867754Smsmith * . (period) to separate segments are supported. 85967754Smsmith * StartNode - Root of subtree to be searched, or NS_ALL for the 86067754Smsmith * root of the name space. If Name is fully 86167754Smsmith * qualified (first INT8 is '\'), the passed value 86267754Smsmith * of Scope will not be accessed. 86391116Smsmith * Flags - Used to indicate whether to perform upsearch or 86491116Smsmith * not. 86567754Smsmith * ReturnNode - Where the Node is returned 86667754Smsmith * 86767754Smsmith * DESCRIPTION: Look up a name relative to a given scope and return the 86867754Smsmith * corresponding Node. NOTE: Scope can be null. 86967754Smsmith * 87067754Smsmith * MUTEX: Locks namespace 87167754Smsmith * 87277424Smsmith ******************************************************************************/ 87367754Smsmith 87467754SmsmithACPI_STATUS 87591116SmsmithAcpiNsGetNodeByPath ( 87667754Smsmith NATIVE_CHAR *Pathname, 87767754Smsmith ACPI_NAMESPACE_NODE *StartNode, 87891116Smsmith UINT32 Flags, 87967754Smsmith ACPI_NAMESPACE_NODE **ReturnNode) 88067754Smsmith{ 88167754Smsmith ACPI_GENERIC_STATE ScopeInfo; 88267754Smsmith ACPI_STATUS Status; 88367754Smsmith NATIVE_CHAR *InternalPath = NULL; 88467754Smsmith 88567754Smsmith 88691116Smsmith ACPI_FUNCTION_TRACE_PTR ("NsGetNodeByPath", Pathname); 88767754Smsmith 88867754Smsmith 88967754Smsmith if (!Pathname) 89067754Smsmith { 89167754Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 89267754Smsmith } 89367754Smsmith 89467754Smsmith /* Convert path to internal representation */ 89567754Smsmith 89667754Smsmith Status = AcpiNsInternalizeName (Pathname, &InternalPath); 89767754Smsmith if (ACPI_FAILURE (Status)) 89867754Smsmith { 89967754Smsmith return_ACPI_STATUS (Status); 90067754Smsmith } 90167754Smsmith 90291116Smsmith /* Must lock namespace during lookup */ 90367754Smsmith 90491116Smsmith Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 90591116Smsmith if (ACPI_FAILURE (Status)) 90691116Smsmith { 90791116Smsmith return_ACPI_STATUS (Status); 90891116Smsmith } 90967754Smsmith 91069746Smsmith /* Setup lookup scope (search starting point) */ 91167754Smsmith 91269746Smsmith ScopeInfo.Scope.Node = StartNode; 91367754Smsmith 91467754Smsmith /* Lookup the name in the namespace */ 91567754Smsmith 91667754Smsmith Status = AcpiNsLookup (&ScopeInfo, InternalPath, 91791116Smsmith ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 91891116Smsmith (Flags | ACPI_NS_DONT_OPEN_SCOPE), 91967754Smsmith NULL, ReturnNode); 92067754Smsmith if (ACPI_FAILURE (Status)) 92167754Smsmith { 92282367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s, %s\n", 92380062Smsmith InternalPath, AcpiFormatException (Status))); 92467754Smsmith } 92567754Smsmith 92667754Smsmith /* Cleanup */ 92767754Smsmith 92891116Smsmith (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 92980062Smsmith ACPI_MEM_FREE (InternalPath); 93067754Smsmith return_ACPI_STATUS (Status); 93167754Smsmith} 93267754Smsmith 93367754Smsmith 93477424Smsmith/******************************************************************************* 93567754Smsmith * 93667754Smsmith * FUNCTION: AcpiNsFindParentName 93767754Smsmith * 93867754Smsmith * PARAMETERS: *ChildNode - Named Obj whose name is to be found 93967754Smsmith * 94067754Smsmith * RETURN: The ACPI name 94167754Smsmith * 94267754Smsmith * DESCRIPTION: Search for the given obj in its parent scope and return the 94367754Smsmith * name segment, or "????" if the parent name can't be found 94467754Smsmith * (which "should not happen"). 94567754Smsmith * 94677424Smsmith ******************************************************************************/ 94767754Smsmith 94867754SmsmithACPI_NAME 94967754SmsmithAcpiNsFindParentName ( 95067754Smsmith ACPI_NAMESPACE_NODE *ChildNode) 95167754Smsmith{ 95267754Smsmith ACPI_NAMESPACE_NODE *ParentNode; 95367754Smsmith 95467754Smsmith 95591116Smsmith ACPI_FUNCTION_TRACE ("NsFindParentName"); 95667754Smsmith 95767754Smsmith 95867754Smsmith if (ChildNode) 95967754Smsmith { 96067754Smsmith /* Valid entry. Get the parent Node */ 96167754Smsmith 96291116Smsmith ParentNode = AcpiNsGetParentNode (ChildNode); 96367754Smsmith if (ParentNode) 96467754Smsmith { 96582367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Parent of %p [%4.4s] is %p [%4.4s]\n", 96691116Smsmith ChildNode, (char *) &ChildNode->Name, 96791116Smsmith ParentNode, (char *) &ParentNode->Name)); 96867754Smsmith 96999146Siwasaki if (ParentNode->Name.Integer) 97067754Smsmith { 97199146Siwasaki return_VALUE (ParentNode->Name.Integer); 97267754Smsmith } 97367754Smsmith } 97467754Smsmith 97582367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "unable to find parent of %p (%4.4s)\n", 97691116Smsmith ChildNode, (char *) &ChildNode->Name)); 97767754Smsmith } 97867754Smsmith 97967754Smsmith return_VALUE (ACPI_UNKNOWN_NAME); 98067754Smsmith} 98167754Smsmith 98267754Smsmith 98371867Smsmith#if defined(ACPI_DEBUG) || defined(ENABLE_DEBUGGER) 98467754Smsmith 98577424Smsmith/******************************************************************************* 98667754Smsmith * 98767754Smsmith * FUNCTION: AcpiNsExistDownstreamSibling 98867754Smsmith * 98967754Smsmith * PARAMETERS: *Node - pointer to first Node to examine 99067754Smsmith * 99167754Smsmith * RETURN: TRUE if sibling is found, FALSE otherwise 99267754Smsmith * 99367754Smsmith * DESCRIPTION: Searches remainder of scope being processed to determine 99467754Smsmith * whether there is a downstream sibling to the current 99567754Smsmith * object. This function is used to determine what type of 99667754Smsmith * line drawing character to use when displaying namespace 99767754Smsmith * trees. 99867754Smsmith * 99977424Smsmith ******************************************************************************/ 100067754Smsmith 100167754SmsmithBOOLEAN 100267754SmsmithAcpiNsExistDownstreamSibling ( 100367754Smsmith ACPI_NAMESPACE_NODE *Node) 100467754Smsmith{ 100567754Smsmith 100667754Smsmith if (!Node) 100767754Smsmith { 100867754Smsmith return (FALSE); 100967754Smsmith } 101067754Smsmith 101199146Siwasaki if (Node->Name.Integer) 101267754Smsmith { 101367754Smsmith return (TRUE); 101467754Smsmith } 101567754Smsmith 101667754Smsmith return (FALSE); 101767754Smsmith} 101867754Smsmith 101967754Smsmith#endif /* ACPI_DEBUG */ 102067754Smsmith 102167754Smsmith 102277424Smsmith/******************************************************************************* 102367754Smsmith * 102491116Smsmith * FUNCTION: AcpiNsGetParentNode 102567754Smsmith * 102667754Smsmith * PARAMETERS: Node - Current table entry 102767754Smsmith * 102867754Smsmith * RETURN: Parent entry of the given entry 102967754Smsmith * 103067754Smsmith * DESCRIPTION: Obtain the parent entry for a given entry in the namespace. 103167754Smsmith * 103277424Smsmith ******************************************************************************/ 103367754Smsmith 103467754Smsmith 103567754SmsmithACPI_NAMESPACE_NODE * 103691116SmsmithAcpiNsGetParentNode ( 103767754Smsmith ACPI_NAMESPACE_NODE *Node) 103867754Smsmith{ 103991116Smsmith ACPI_FUNCTION_ENTRY (); 104067754Smsmith 104167754Smsmith 104269746Smsmith if (!Node) 104369746Smsmith { 104469746Smsmith return (NULL); 104569746Smsmith } 104669746Smsmith 104767754Smsmith /* 104867754Smsmith * Walk to the end of this peer list. 104967754Smsmith * The last entry is marked with a flag and the peer 105067754Smsmith * pointer is really a pointer back to the parent. 105167754Smsmith * This saves putting a parent back pointer in each and 105267754Smsmith * every named object! 105367754Smsmith */ 105467754Smsmith while (!(Node->Flags & ANOBJ_END_OF_PEER_LIST)) 105567754Smsmith { 105667754Smsmith Node = Node->Peer; 105767754Smsmith } 105867754Smsmith 105967754Smsmith 106067754Smsmith return (Node->Peer); 106167754Smsmith} 106267754Smsmith 106367754Smsmith 106477424Smsmith/******************************************************************************* 106567754Smsmith * 106685756Smsmith * FUNCTION: AcpiNsGetNextValidNode 106767754Smsmith * 106867754Smsmith * PARAMETERS: Node - Current table entry 106967754Smsmith * 107085756Smsmith * RETURN: Next valid Node in the linked node list. NULL if no more valid 107185756Smsmith * nodess 107267754Smsmith * 107385756Smsmith * DESCRIPTION: Find the next valid node within a name table. 107467754Smsmith * Useful for implementing NULL-end-of-list loops. 107567754Smsmith * 107677424Smsmith ******************************************************************************/ 107767754Smsmith 107867754Smsmith 107967754SmsmithACPI_NAMESPACE_NODE * 108085756SmsmithAcpiNsGetNextValidNode ( 108167754Smsmith ACPI_NAMESPACE_NODE *Node) 108267754Smsmith{ 108367754Smsmith 108467754Smsmith /* If we are at the end of this peer list, return NULL */ 108567754Smsmith 108667754Smsmith if (Node->Flags & ANOBJ_END_OF_PEER_LIST) 108767754Smsmith { 108867754Smsmith return NULL; 108967754Smsmith } 109067754Smsmith 109167754Smsmith /* Otherwise just return the next peer */ 109267754Smsmith 109367754Smsmith return (Node->Peer); 109467754Smsmith} 109567754Smsmith 109667754Smsmith 1097