diff options
Diffstat (limited to 'sys/contrib/dev/acpica/psloop.c')
| -rw-r--r-- | sys/contrib/dev/acpica/psloop.c | 927 |
1 files changed, 927 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/psloop.c b/sys/contrib/dev/acpica/psloop.c new file mode 100644 index 0000000..91933c7 --- /dev/null +++ b/sys/contrib/dev/acpica/psloop.c @@ -0,0 +1,927 @@ +/****************************************************************************** + * + * Module Name: psloop - Main AML parse loop + * $Revision: 1.5 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2005, Intel Corp. + * All rights reserved. + * + * 2. License + * + * 2.1. This is your license from Intel Corp. under its intellectual property + * rights. You may have additional license terms from the party that provided + * you this software, covering your right to use that party's intellectual + * property rights. + * + * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a + * copy of the source code appearing in this file ("Covered Code") an + * irrevocable, perpetual, worldwide license under Intel's copyrights in the + * base code distributed originally by Intel ("Original Intel Code") to copy, + * make derivatives, distribute, use and display any portion of the Covered + * Code in any form, with the right to sublicense such rights; and + * + * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent + * license (with the right to sublicense), under only those claims of Intel + * patents that are infringed by the Original Intel Code, to make, use, sell, + * offer to sell, and import the Covered Code and derivative works thereof + * solely to the minimum extent necessary to exercise the above copyright + * license, and in no event shall the patent license extend to any additions + * to or modifications of the Original Intel Code. No other license or right + * is granted directly or by implication, estoppel or otherwise; + * + * The above copyright and patent license is granted only if the following + * conditions are met: + * + * 3. Conditions + * + * 3.1. Redistribution of Source with Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification with rights to further distribute source must include + * the above Copyright Notice, the above License, this list of Conditions, + * and the following Disclaimer and Export Compliance provision. In addition, + * Licensee must cause all Covered Code to which Licensee contributes to + * contain a file documenting the changes Licensee made to create that Covered + * Code and the date of any change. Licensee must include in that file the + * documentation of any changes made by any predecessor Licensee. Licensee + * must include a prominent statement that the modification is derived, + * directly or indirectly, from Original Intel Code. + * + * 3.2. Redistribution of Source with no Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification without rights to further distribute source must + * include the following Disclaimer and Export Compliance provision in the + * documentation and/or other materials provided with distribution. In + * addition, Licensee may not authorize further sublicense of source of any + * portion of the Covered Code, and must include terms to the effect that the + * license from Licensee to its licensee is limited to the intellectual + * property embodied in the software Licensee provides to its licensee, and + * not to intellectual property embodied in modifications its licensee may + * make. + * + * 3.3. Redistribution of Executable. Redistribution in executable form of any + * substantial portion of the Covered Code or modification must reproduce the + * above Copyright Notice, and the following Disclaimer and Export Compliance + * provision in the documentation and/or other materials provided with the + * distribution. + * + * 3.4. Intel retains all right, title, and interest in and to the Original + * Intel Code. + * + * 3.5. Neither the name Intel nor any other trademark owned or controlled by + * Intel shall be used in advertising or otherwise to promote the sale, use or + * other dealings in products derived from or relating to the Covered Code + * without prior written authorization from Intel. + * + * 4. Disclaimer and Export Compliance + * + * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED + * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE + * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, + * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY + * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY + * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A + * PARTICULAR PURPOSE. + * + * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES + * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR + * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, + * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY + * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL + * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS + * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY + * LIMITED REMEDY. + * + * 4.3. Licensee shall not export, either directly or indirectly, any of this + * software or system incorporating such software without first obtaining any + * required license or other approval from the U. S. Department of Commerce or + * any other agency or department of the United States Government. In the + * event Licensee exports any such software from the United States or + * re-exports any such software from a foreign destination, Licensee shall + * ensure that the distribution and export/re-export of the software is in + * compliance with all laws, regulations, orders, or other restrictions of the + * U.S. Export Administration Regulations. Licensee agrees that neither it nor + * any of its subsidiaries will export/re-export any technical data, process, + * software, or service, directly or indirectly, to any country for which the + * United States government or any agency thereof requires an export license, + * other governmental approval, or letter of assurance, without first obtaining + * such license, approval or letter. + * + *****************************************************************************/ + + +/* + * Parse the AML and build an operation tree as most interpreters, + * like Perl, do. Parsing is done by hand rather than with a YACC + * generated parser to tightly constrain stack and dynamic memory + * usage. At the same time, parsing is kept flexible and the code + * fairly compact by parsing based on a list of AML opcode + * templates in AmlOpInfo[] + */ + +#include <contrib/dev/acpica/acpi.h> +#include <contrib/dev/acpica/acparser.h> +#include <contrib/dev/acpica/acdispat.h> +#include <contrib/dev/acpica/amlcode.h> + +#define _COMPONENT ACPI_PARSER + ACPI_MODULE_NAME ("psloop") + +static UINT32 AcpiGbl_Depth = 0; + + +/******************************************************************************* + * + * FUNCTION: AcpiPsParseLoop + * + * PARAMETERS: WalkState - Current state + * + * RETURN: Status + * + * DESCRIPTION: Parse AML (pointed to by the current parser state) and return + * a tree of ops. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiPsParseLoop ( + ACPI_WALK_STATE *WalkState) +{ + ACPI_STATUS Status = AE_OK; + ACPI_STATUS Status2; + ACPI_PARSE_OBJECT *Op = NULL; /* current op */ + ACPI_PARSE_OBJECT *Arg = NULL; + ACPI_PARSE_OBJECT *PreOp = NULL; + ACPI_PARSE_STATE *ParserState; + UINT8 *AmlOpStart = NULL; + + + ACPI_FUNCTION_TRACE_PTR ("PsParseLoop", WalkState); + + if (WalkState->DescendingCallback == NULL) + { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + ParserState = &WalkState->ParserState; + WalkState->ArgTypes = 0; + +#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) + + if (WalkState->WalkType & ACPI_WALK_METHOD_RESTART) + { + /* We are restarting a preempted control method */ + + if (AcpiPsHasCompletedScope (ParserState)) + { + /* + * We must check if a predicate to an IF or WHILE statement + * was just completed + */ + if ((ParserState->Scope->ParseScope.Op) && + ((ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_IF_OP) || + (ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_WHILE_OP)) && + (WalkState->ControlState) && + (WalkState->ControlState->Common.State == + ACPI_CONTROL_PREDICATE_EXECUTING)) + { + /* + * A predicate was just completed, get the value of the + * predicate and branch based on that value + */ + WalkState->Op = NULL; + Status = AcpiDsGetPredicateValue (WalkState, ACPI_TO_POINTER (TRUE)); + if (ACPI_FAILURE (Status) && + ((Status & AE_CODE_MASK) != AE_CODE_CONTROL)) + { + if (Status == AE_AML_NO_RETURN_VALUE) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Invoked method did not return a value, %s\n", + AcpiFormatException (Status))); + + } + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "GetPredicate Failed, %s\n", + AcpiFormatException (Status))); + return_ACPI_STATUS (Status); + } + + Status = AcpiPsNextParseState (WalkState, Op, Status); + } + + AcpiPsPopScope (ParserState, &Op, + &WalkState->ArgTypes, &WalkState->ArgCount); + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", Op)); + } + else if (WalkState->PrevOp) + { + /* We were in the middle of an op */ + + Op = WalkState->PrevOp; + WalkState->ArgTypes = WalkState->PrevArgTypes; + } + } +#endif + + /* Iterative parsing loop, while there is more AML to process: */ + + while ((ParserState->Aml < ParserState->AmlEnd) || (Op)) + { + AmlOpStart = ParserState->Aml; + if (!Op) + { + /* Get the next opcode from the AML stream */ + + WalkState->AmlOffset = (UINT32) ACPI_PTR_DIFF (ParserState->Aml, + ParserState->AmlStart); + WalkState->Opcode = AcpiPsPeekOpcode (ParserState); + + /* + * First cut to determine what we have found: + * 1) A valid AML opcode + * 2) A name string + * 3) An unknown/invalid opcode + */ + WalkState->OpInfo = AcpiPsGetOpcodeInfo (WalkState->Opcode); + switch (WalkState->OpInfo->Class) + { + case AML_CLASS_ASCII: + case AML_CLASS_PREFIX: + /* + * Starts with a valid prefix or ASCII char, this is a name + * string. Convert the bare name string to a namepath. + */ + WalkState->Opcode = AML_INT_NAMEPATH_OP; + WalkState->ArgTypes = ARGP_NAMESTRING; + break; + + case AML_CLASS_UNKNOWN: + + /* The opcode is unrecognized. Just skip unknown opcodes */ + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Found unknown opcode %X at AML address %p offset %X, ignoring\n", + WalkState->Opcode, ParserState->Aml, WalkState->AmlOffset)); + + ACPI_DUMP_BUFFER (ParserState->Aml, 128); + + /* Assume one-byte bad opcode */ + + ParserState->Aml++; + continue; + + default: + + /* Found opcode info, this is a normal opcode */ + + ParserState->Aml += AcpiPsGetOpcodeSize (WalkState->Opcode); + WalkState->ArgTypes = WalkState->OpInfo->ParseArgs; + break; + } + + /* Create Op structure and append to parent's argument list */ + + if (WalkState->OpInfo->Flags & AML_NAMED) + { + /* Allocate a new PreOp if necessary */ + + if (!PreOp) + { + PreOp = AcpiPsAllocOp (WalkState->Opcode); + if (!PreOp) + { + Status = AE_NO_MEMORY; + goto CloseThisOp; + } + } + + PreOp->Common.Value.Arg = NULL; + PreOp->Common.AmlOpcode = WalkState->Opcode; + + /* + * Get and append arguments until we find the node that contains + * the name (the type ARGP_NAME). + */ + while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) && + (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) != ARGP_NAME)) + { + Status = AcpiPsGetNextArg (WalkState, ParserState, + GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg); + if (ACPI_FAILURE (Status)) + { + goto CloseThisOp; + } + + AcpiPsAppendArg (PreOp, Arg); + INCREMENT_ARG_LIST (WalkState->ArgTypes); + } + + /* + * Make sure that we found a NAME and didn't run out of + * arguments + */ + if (!GET_CURRENT_ARG_TYPE (WalkState->ArgTypes)) + { + Status = AE_AML_NO_OPERAND; + goto CloseThisOp; + } + + /* We know that this arg is a name, move to next arg */ + + INCREMENT_ARG_LIST (WalkState->ArgTypes); + + /* + * Find the object. This will either insert the object into + * the namespace or simply look it up + */ + WalkState->Op = NULL; + + Status = WalkState->DescendingCallback (WalkState, &Op); + if (ACPI_FAILURE (Status)) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "During name lookup/catalog, %s\n", + AcpiFormatException (Status))); + goto CloseThisOp; + } + + if (!Op) + { + continue; + } + + Status = AcpiPsNextParseState (WalkState, Op, Status); + if (Status == AE_CTRL_PENDING) + { + Status = AE_OK; + goto CloseThisOp; + } + + if (ACPI_FAILURE (Status)) + { + goto CloseThisOp; + } + + AcpiPsAppendArg (Op, PreOp->Common.Value.Arg); + AcpiGbl_Depth++; + + if (Op->Common.AmlOpcode == AML_REGION_OP) + { + /* + * Defer final parsing of an OperationRegion body, + * because we don't have enough info in the first pass + * to parse it correctly (i.e., there may be method + * calls within the TermArg elements of the body.) + * + * However, we must continue parsing because + * the opregion is not a standalone package -- + * we don't know where the end is at this point. + * + * (Length is unknown until parse of the body complete) + */ + Op->Named.Data = AmlOpStart; + Op->Named.Length = 0; + } + } + else + { + /* Not a named opcode, just allocate Op and append to parent */ + + WalkState->OpInfo = AcpiPsGetOpcodeInfo (WalkState->Opcode); + Op = AcpiPsAllocOp (WalkState->Opcode); + if (!Op) + { + Status = AE_NO_MEMORY; + goto CloseThisOp; + } + + if (WalkState->OpInfo->Flags & AML_CREATE) + { + /* + * Backup to beginning of CreateXXXfield declaration + * BodyLength is unknown until we parse the body + */ + Op->Named.Data = AmlOpStart; + Op->Named.Length = 0; + } + + AcpiPsAppendArg (AcpiPsGetParentScope (ParserState), Op); + + if ((WalkState->DescendingCallback != NULL)) + { + /* + * Find the object. This will either insert the object into + * the namespace or simply look it up + */ + WalkState->Op = Op; + + Status = WalkState->DescendingCallback (WalkState, &Op); + Status = AcpiPsNextParseState (WalkState, Op, Status); + if (Status == AE_CTRL_PENDING) + { + Status = AE_OK; + goto CloseThisOp; + } + + if (ACPI_FAILURE (Status)) + { + goto CloseThisOp; + } + } + } + + Op->Common.AmlOffset = WalkState->AmlOffset; + + if (WalkState->OpInfo) + { + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, + "Opcode %4.4X [%s] Op %p Aml %p AmlOffset %5.5X\n", + (UINT32) Op->Common.AmlOpcode, WalkState->OpInfo->Name, + Op, ParserState->Aml, Op->Common.AmlOffset)); + } + } + + + /* + * Start ArgCount at zero because we don't know if there are + * any args yet + */ + WalkState->ArgCount = 0; + + /* Are there any arguments that must be processed? */ + + if (WalkState->ArgTypes) + { + /* Get arguments */ + + switch (Op->Common.AmlOpcode) + { + case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ + case AML_WORD_OP: /* AML_WORDDATA_ARG */ + case AML_DWORD_OP: /* AML_DWORDATA_ARG */ + case AML_QWORD_OP: /* AML_QWORDATA_ARG */ + case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ + + /* Fill in constant or string argument directly */ + + AcpiPsGetNextSimpleArg (ParserState, + GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), Op); + break; + + case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ + + Status = AcpiPsGetNextNamepath (WalkState, ParserState, Op, 1); + if (ACPI_FAILURE (Status)) + { + goto CloseThisOp; + } + + WalkState->ArgTypes = 0; + break; + + default: + /* + * Op is not a constant or string, append each argument + * to the Op + */ + while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) && + !WalkState->ArgCount) + { + WalkState->AmlOffset = (UINT32) + ACPI_PTR_DIFF (ParserState->Aml, ParserState->AmlStart); + + Status = AcpiPsGetNextArg (WalkState, ParserState, + GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), + &Arg); + if (ACPI_FAILURE (Status)) + { + goto CloseThisOp; + } + + if (Arg) + { + Arg->Common.AmlOffset = WalkState->AmlOffset; + AcpiPsAppendArg (Op, Arg); + } + INCREMENT_ARG_LIST (WalkState->ArgTypes); + } + + + /* Special processing for certain opcodes */ + + /* TBD (remove): Temporary mechanism to disable this code if needed */ + +#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE + + if ((WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS1) && + ((WalkState->ParseFlags & ACPI_PARSE_DISASSEMBLE) == 0)) + { + /* + * We want to skip If/Else/While constructs during Pass1 + * because we want to actually conditionally execute the + * code during Pass2. + * + * Except for disassembly, where we always want to + * walk the If/Else/While packages + */ + switch (Op->Common.AmlOpcode) + { + case AML_IF_OP: + case AML_ELSE_OP: + case AML_WHILE_OP: + + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, + "Pass1: Skipping an If/Else/While body\n")); + + /* Skip body of if/else/while in pass 1 */ + + ParserState->Aml = ParserState->PkgEnd; + WalkState->ArgCount = 0; + break; + + default: + break; + } + } +#endif + switch (Op->Common.AmlOpcode) + { + case AML_METHOD_OP: + + /* + * Skip parsing of control method + * because we don't have enough info in the first pass + * to parse it correctly. + * + * Save the length and address of the body + */ + Op->Named.Data = ParserState->Aml; + Op->Named.Length = (UINT32) (ParserState->PkgEnd - + ParserState->Aml); + + /* Skip body of method */ + + ParserState->Aml = ParserState->PkgEnd; + WalkState->ArgCount = 0; + break; + + case AML_BUFFER_OP: + case AML_PACKAGE_OP: + case AML_VAR_PACKAGE_OP: + + if ((Op->Common.Parent) && + (Op->Common.Parent->Common.AmlOpcode == AML_NAME_OP) && + (WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2)) + { + /* + * Skip parsing of Buffers and Packages + * because we don't have enough info in the first pass + * to parse them correctly. + */ + Op->Named.Data = AmlOpStart; + Op->Named.Length = (UINT32) (ParserState->PkgEnd - + AmlOpStart); + + /* Skip body */ + + ParserState->Aml = ParserState->PkgEnd; + WalkState->ArgCount = 0; + } + break; + + case AML_WHILE_OP: + + if (WalkState->ControlState) + { + WalkState->ControlState->Control.PackageEnd = + ParserState->PkgEnd; + } + break; + + default: + + /* No action for all other opcodes */ + break; + } + break; + } + } + + /* Check for arguments that need to be processed */ + + if (WalkState->ArgCount) + { + /* + * There are arguments (complex ones), push Op and + * prepare for argument + */ + Status = AcpiPsPushScope (ParserState, Op, + WalkState->ArgTypes, WalkState->ArgCount); + if (ACPI_FAILURE (Status)) + { + goto CloseThisOp; + } + Op = NULL; + continue; + } + + /* + * All arguments have been processed -- Op is complete, + * prepare for next + */ + WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); + if (WalkState->OpInfo->Flags & AML_NAMED) + { + if (AcpiGbl_Depth) + { + AcpiGbl_Depth--; + } + + if (Op->Common.AmlOpcode == AML_REGION_OP) + { + /* + * Skip parsing of control method or opregion body, + * because we don't have enough info in the first pass + * to parse them correctly. + * + * Completed parsing an OpRegion declaration, we now + * know the length. + */ + Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); + } + } + + if (WalkState->OpInfo->Flags & AML_CREATE) + { + /* + * Backup to beginning of CreateXXXfield declaration (1 for + * Opcode) + * + * BodyLength is unknown until we parse the body + */ + Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); + } + + /* This op complete, notify the dispatcher */ + + if (WalkState->AscendingCallback != NULL) + { + WalkState->Op = Op; + WalkState->Opcode = Op->Common.AmlOpcode; + + Status = WalkState->AscendingCallback (WalkState); + Status = AcpiPsNextParseState (WalkState, Op, Status); + if (Status == AE_CTRL_PENDING) + { + Status = AE_OK; + goto CloseThisOp; + } + } + + +CloseThisOp: + /* + * Finished one argument of the containing scope + */ + ParserState->Scope->ParseScope.ArgCount--; + + /* Finished with PreOp */ + + if (PreOp) + { + AcpiPsFreeOp (PreOp); + PreOp = NULL; + } + + /* Close this Op (will result in parse subtree deletion) */ + + Status2 = AcpiPsCompleteThisOp (WalkState, Op); + if (ACPI_FAILURE (Status2)) + { + return_ACPI_STATUS (Status2); + } + Op = NULL; + + switch (Status) + { + case AE_OK: + break; + + + case AE_CTRL_TRANSFER: + + /* We are about to transfer to a called method. */ + + WalkState->PrevOp = Op; + WalkState->PrevArgTypes = WalkState->ArgTypes; + return_ACPI_STATUS (Status); + + + case AE_CTRL_END: + + AcpiPsPopScope (ParserState, &Op, + &WalkState->ArgTypes, &WalkState->ArgCount); + + if (Op) + { + WalkState->Op = Op; + WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); + WalkState->Opcode = Op->Common.AmlOpcode; + + Status = WalkState->AscendingCallback (WalkState); + Status = AcpiPsNextParseState (WalkState, Op, Status); + + Status2 = AcpiPsCompleteThisOp (WalkState, Op); + if (ACPI_FAILURE (Status2)) + { + return_ACPI_STATUS (Status2); + } + Op = NULL; + } + Status = AE_OK; + break; + + + case AE_CTRL_BREAK: + case AE_CTRL_CONTINUE: + + /* Pop off scopes until we find the While */ + + while (!Op || (Op->Common.AmlOpcode != AML_WHILE_OP)) + { + AcpiPsPopScope (ParserState, &Op, + &WalkState->ArgTypes, &WalkState->ArgCount); + } + + /* Close this iteration of the While loop */ + + WalkState->Op = Op; + WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); + WalkState->Opcode = Op->Common.AmlOpcode; + + Status = WalkState->AscendingCallback (WalkState); + Status = AcpiPsNextParseState (WalkState, Op, Status); + + Status2 = AcpiPsCompleteThisOp (WalkState, Op); + if (ACPI_FAILURE (Status2)) + { + return_ACPI_STATUS (Status2); + } + Op = NULL; + + Status = AE_OK; + break; + + + case AE_CTRL_TERMINATE: + + Status = AE_OK; + + /* Clean up */ + do + { + if (Op) + { + Status2 = AcpiPsCompleteThisOp (WalkState, Op); + if (ACPI_FAILURE (Status2)) + { + return_ACPI_STATUS (Status2); + } + } + AcpiPsPopScope (ParserState, &Op, + &WalkState->ArgTypes, &WalkState->ArgCount); + + } while (Op); + + return_ACPI_STATUS (Status); + + + default: /* All other non-AE_OK status */ + + do + { + if (Op) + { + Status2 = AcpiPsCompleteThisOp (WalkState, Op); + if (ACPI_FAILURE (Status2)) + { + return_ACPI_STATUS (Status2); + } + } + AcpiPsPopScope (ParserState, &Op, + &WalkState->ArgTypes, &WalkState->ArgCount); + + } while (Op); + + + /* + * TBD: Cleanup parse ops on error + */ +#if 0 + if (Op == NULL) + { + AcpiPsPopScope (ParserState, &Op, + &WalkState->ArgTypes, &WalkState->ArgCount); + } +#endif + WalkState->PrevOp = Op; + WalkState->PrevArgTypes = WalkState->ArgTypes; + return_ACPI_STATUS (Status); + } + + /* This scope complete? */ + + if (AcpiPsHasCompletedScope (ParserState)) + { + AcpiPsPopScope (ParserState, &Op, + &WalkState->ArgTypes, &WalkState->ArgCount); + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", Op)); + } + else + { + Op = NULL; + } + + } /* while ParserState->Aml */ + + + /* + * Complete the last Op (if not completed), and clear the scope stack. + * It is easily possible to end an AML "package" with an unbounded number + * of open scopes (such as when several ASL blocks are closed with + * sequential closing braces). We want to terminate each one cleanly. + */ + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", Op)); + do + { + if (Op) + { + if (WalkState->AscendingCallback != NULL) + { + WalkState->Op = Op; + WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); + WalkState->Opcode = Op->Common.AmlOpcode; + + Status = WalkState->AscendingCallback (WalkState); + Status = AcpiPsNextParseState (WalkState, Op, Status); + if (Status == AE_CTRL_PENDING) + { + Status = AE_OK; + goto CloseThisOp; + } + + if (Status == AE_CTRL_TERMINATE) + { + Status = AE_OK; + + /* Clean up */ + do + { + if (Op) + { + Status2 = AcpiPsCompleteThisOp (WalkState, Op); + if (ACPI_FAILURE (Status2)) + { + return_ACPI_STATUS (Status2); + } + } + + AcpiPsPopScope (ParserState, &Op, + &WalkState->ArgTypes, &WalkState->ArgCount); + + } while (Op); + + return_ACPI_STATUS (Status); + } + + else if (ACPI_FAILURE (Status)) + { + /* First error is most important */ + + (void) AcpiPsCompleteThisOp (WalkState, Op); + return_ACPI_STATUS (Status); + } + } + + Status2 = AcpiPsCompleteThisOp (WalkState, Op); + if (ACPI_FAILURE (Status2)) + { + return_ACPI_STATUS (Status2); + } + } + + AcpiPsPopScope (ParserState, &Op, &WalkState->ArgTypes, + &WalkState->ArgCount); + + } while (Op); + + return_ACPI_STATUS (Status); +} + + |
