1269 lines
37 KiB
C
1269 lines
37 KiB
C
/******************************************************************************
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*
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* Module Name: psloop - Main AML parse loop
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2011, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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/*
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* Parse the AML and build an operation tree as most interpreters, (such as
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* Perl) do. Parsing is done by hand rather than with a YACC generated parser
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* to tightly constrain stack and dynamic memory usage. Parsing is kept
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* flexible and the code fairly compact by parsing based on a list of AML
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* opcode templates in AmlOpInfo[].
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acparser.h"
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#include "acdispat.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME ("psloop")
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static UINT32 AcpiGbl_Depth = 0;
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/* Local prototypes */
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static ACPI_STATUS
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AcpiPsGetAmlOpcode (
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ACPI_WALK_STATE *WalkState);
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static ACPI_STATUS
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AcpiPsBuildNamedOp (
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ACPI_WALK_STATE *WalkState,
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UINT8 *AmlOpStart,
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ACPI_PARSE_OBJECT *UnnamedOp,
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ACPI_PARSE_OBJECT **Op);
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static ACPI_STATUS
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AcpiPsCreateOp (
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ACPI_WALK_STATE *WalkState,
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UINT8 *AmlOpStart,
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ACPI_PARSE_OBJECT **NewOp);
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static ACPI_STATUS
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AcpiPsGetArguments (
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ACPI_WALK_STATE *WalkState,
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UINT8 *AmlOpStart,
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ACPI_PARSE_OBJECT *Op);
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static ACPI_STATUS
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AcpiPsCompleteOp (
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ACPI_WALK_STATE *WalkState,
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ACPI_PARSE_OBJECT **Op,
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ACPI_STATUS Status);
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static ACPI_STATUS
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AcpiPsCompleteFinalOp (
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ACPI_WALK_STATE *WalkState,
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ACPI_PARSE_OBJECT *Op,
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ACPI_STATUS Status);
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static void
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AcpiPsLinkModuleCode (
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ACPI_PARSE_OBJECT *ParentOp,
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UINT8 *AmlStart,
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UINT32 AmlLength,
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ACPI_OWNER_ID OwnerId);
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsGetAmlOpcode
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*
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* PARAMETERS: WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Extract the next AML opcode from the input stream.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiPsGetAmlOpcode (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_FUNCTION_TRACE_PTR (PsGetAmlOpcode, WalkState);
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WalkState->AmlOffset = (UINT32) ACPI_PTR_DIFF (WalkState->ParserState.Aml,
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WalkState->ParserState.AmlStart);
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WalkState->Opcode = AcpiPsPeekOpcode (&(WalkState->ParserState));
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/*
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* First cut to determine what we have found:
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* 1) A valid AML opcode
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* 2) A name string
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* 3) An unknown/invalid opcode
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*/
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WalkState->OpInfo = AcpiPsGetOpcodeInfo (WalkState->Opcode);
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switch (WalkState->OpInfo->Class)
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{
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case AML_CLASS_ASCII:
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case AML_CLASS_PREFIX:
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/*
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* Starts with a valid prefix or ASCII char, this is a name
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* string. Convert the bare name string to a namepath.
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*/
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WalkState->Opcode = AML_INT_NAMEPATH_OP;
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WalkState->ArgTypes = ARGP_NAMESTRING;
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break;
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case AML_CLASS_UNKNOWN:
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/* The opcode is unrecognized. Just skip unknown opcodes */
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ACPI_ERROR ((AE_INFO,
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"Found unknown opcode 0x%X at AML address %p offset 0x%X, ignoring",
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WalkState->Opcode, WalkState->ParserState.Aml, WalkState->AmlOffset));
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ACPI_DUMP_BUFFER (WalkState->ParserState.Aml, 128);
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/* Assume one-byte bad opcode */
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WalkState->ParserState.Aml++;
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return_ACPI_STATUS (AE_CTRL_PARSE_CONTINUE);
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default:
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/* Found opcode info, this is a normal opcode */
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WalkState->ParserState.Aml += AcpiPsGetOpcodeSize (WalkState->Opcode);
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WalkState->ArgTypes = WalkState->OpInfo->ParseArgs;
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break;
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsBuildNamedOp
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*
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* PARAMETERS: WalkState - Current state
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* AmlOpStart - Begin of named Op in AML
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* UnnamedOp - Early Op (not a named Op)
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* Op - Returned Op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Parse a named Op
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiPsBuildNamedOp (
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ACPI_WALK_STATE *WalkState,
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UINT8 *AmlOpStart,
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ACPI_PARSE_OBJECT *UnnamedOp,
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ACPI_PARSE_OBJECT **Op)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_PARSE_OBJECT *Arg = NULL;
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ACPI_FUNCTION_TRACE_PTR (PsBuildNamedOp, WalkState);
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UnnamedOp->Common.Value.Arg = NULL;
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UnnamedOp->Common.ArgListLength = 0;
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UnnamedOp->Common.AmlOpcode = WalkState->Opcode;
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/*
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* Get and append arguments until we find the node that contains
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* the name (the type ARGP_NAME).
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*/
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while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) &&
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(GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) != ARGP_NAME))
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{
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Status = AcpiPsGetNextArg (WalkState, &(WalkState->ParserState),
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GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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AcpiPsAppendArg (UnnamedOp, Arg);
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INCREMENT_ARG_LIST (WalkState->ArgTypes);
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}
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/*
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* Make sure that we found a NAME and didn't run out of arguments
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*/
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if (!GET_CURRENT_ARG_TYPE (WalkState->ArgTypes))
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{
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/* We know that this arg is a name, move to next arg */
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INCREMENT_ARG_LIST (WalkState->ArgTypes);
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/*
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* Find the object. This will either insert the object into
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* the namespace or simply look it up
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*/
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WalkState->Op = NULL;
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Status = WalkState->DescendingCallback (WalkState, Op);
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "During name lookup/catalog"));
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return_ACPI_STATUS (Status);
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}
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if (!*Op)
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{
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return_ACPI_STATUS (AE_CTRL_PARSE_CONTINUE);
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}
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Status = AcpiPsNextParseState (WalkState, *Op, Status);
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if (ACPI_FAILURE (Status))
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{
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if (Status == AE_CTRL_PENDING)
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{
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return_ACPI_STATUS (AE_CTRL_PARSE_PENDING);
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}
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return_ACPI_STATUS (Status);
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}
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AcpiPsAppendArg (*Op, UnnamedOp->Common.Value.Arg);
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AcpiGbl_Depth++;
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if ((*Op)->Common.AmlOpcode == AML_REGION_OP ||
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(*Op)->Common.AmlOpcode == AML_DATA_REGION_OP)
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{
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/*
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* Defer final parsing of an OperationRegion body, because we don't
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* have enough info in the first pass to parse it correctly (i.e.,
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* there may be method calls within the TermArg elements of the body.)
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*
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* However, we must continue parsing because the opregion is not a
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* standalone package -- we don't know where the end is at this point.
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*
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* (Length is unknown until parse of the body complete)
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*/
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(*Op)->Named.Data = AmlOpStart;
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(*Op)->Named.Length = 0;
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsCreateOp
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*
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* PARAMETERS: WalkState - Current state
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* AmlOpStart - Op start in AML
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* NewOp - Returned Op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get Op from AML
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiPsCreateOp (
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ACPI_WALK_STATE *WalkState,
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UINT8 *AmlOpStart,
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ACPI_PARSE_OBJECT **NewOp)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_PARSE_OBJECT *Op;
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ACPI_PARSE_OBJECT *NamedOp = NULL;
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ACPI_PARSE_OBJECT *ParentScope;
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UINT8 ArgumentCount;
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const ACPI_OPCODE_INFO *OpInfo;
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ACPI_FUNCTION_TRACE_PTR (PsCreateOp, WalkState);
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Status = AcpiPsGetAmlOpcode (WalkState);
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if (Status == AE_CTRL_PARSE_CONTINUE)
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{
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return_ACPI_STATUS (AE_CTRL_PARSE_CONTINUE);
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}
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/* Create Op structure and append to parent's argument list */
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WalkState->OpInfo = AcpiPsGetOpcodeInfo (WalkState->Opcode);
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Op = AcpiPsAllocOp (WalkState->Opcode);
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if (!Op)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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if (WalkState->OpInfo->Flags & AML_NAMED)
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{
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Status = AcpiPsBuildNamedOp (WalkState, AmlOpStart, Op, &NamedOp);
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AcpiPsFreeOp (Op);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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*NewOp = NamedOp;
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return_ACPI_STATUS (AE_OK);
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}
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/* Not a named opcode, just allocate Op and append to parent */
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if (WalkState->OpInfo->Flags & AML_CREATE)
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{
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/*
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* Backup to beginning of CreateXXXfield declaration
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* BodyLength is unknown until we parse the body
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*/
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Op->Named.Data = AmlOpStart;
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Op->Named.Length = 0;
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}
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if (WalkState->Opcode == AML_BANK_FIELD_OP)
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{
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/*
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* Backup to beginning of BankField declaration
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* BodyLength is unknown until we parse the body
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*/
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Op->Named.Data = AmlOpStart;
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Op->Named.Length = 0;
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}
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ParentScope = AcpiPsGetParentScope (&(WalkState->ParserState));
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AcpiPsAppendArg (ParentScope, Op);
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if (ParentScope)
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{
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OpInfo = AcpiPsGetOpcodeInfo (ParentScope->Common.AmlOpcode);
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if (OpInfo->Flags & AML_HAS_TARGET)
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{
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ArgumentCount = AcpiPsGetArgumentCount (OpInfo->Type);
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if (ParentScope->Common.ArgListLength > ArgumentCount)
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{
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Op->Common.Flags |= ACPI_PARSEOP_TARGET;
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}
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}
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else if (ParentScope->Common.AmlOpcode == AML_INCREMENT_OP)
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{
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Op->Common.Flags |= ACPI_PARSEOP_TARGET;
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}
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}
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if (WalkState->DescendingCallback != NULL)
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{
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/*
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* Find the object. This will either insert the object into
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* the namespace or simply look it up
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*/
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WalkState->Op = *NewOp = Op;
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Status = WalkState->DescendingCallback (WalkState, &Op);
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Status = AcpiPsNextParseState (WalkState, Op, Status);
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if (Status == AE_CTRL_PENDING)
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{
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Status = AE_CTRL_PARSE_PENDING;
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}
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsGetArguments
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*
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* PARAMETERS: WalkState - Current state
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* AmlOpStart - Op start in AML
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* Op - Current Op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get arguments for passed Op.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiPsGetArguments (
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ACPI_WALK_STATE *WalkState,
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UINT8 *AmlOpStart,
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ACPI_PARSE_OBJECT *Op)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_PARSE_OBJECT *Arg = NULL;
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const ACPI_OPCODE_INFO *OpInfo;
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|
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ACPI_FUNCTION_TRACE_PTR (PsGetArguments, WalkState);
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|
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switch (Op->Common.AmlOpcode)
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{
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case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
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case AML_WORD_OP: /* AML_WORDDATA_ARG */
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case AML_DWORD_OP: /* AML_DWORDATA_ARG */
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case AML_QWORD_OP: /* AML_QWORDATA_ARG */
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case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */
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/* Fill in constant or string argument directly */
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AcpiPsGetNextSimpleArg (&(WalkState->ParserState),
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GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), Op);
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break;
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case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */
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Status = AcpiPsGetNextNamepath (WalkState, &(WalkState->ParserState), Op, 1);
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if (ACPI_FAILURE (Status))
|
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{
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return_ACPI_STATUS (Status);
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}
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WalkState->ArgTypes = 0;
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break;
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default:
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/*
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* Op is not a constant or string, append each argument to the Op
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*/
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while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) && !WalkState->ArgCount)
|
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{
|
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WalkState->AmlOffset = (UINT32) ACPI_PTR_DIFF (WalkState->ParserState.Aml,
|
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WalkState->ParserState.AmlStart);
|
|
|
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Status = AcpiPsGetNextArg (WalkState, &(WalkState->ParserState),
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GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg);
|
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if (ACPI_FAILURE (Status))
|
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{
|
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return_ACPI_STATUS (Status);
|
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}
|
|
|
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if (Arg)
|
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{
|
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Arg->Common.AmlOffset = WalkState->AmlOffset;
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AcpiPsAppendArg (Op, Arg);
|
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}
|
|
|
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INCREMENT_ARG_LIST (WalkState->ArgTypes);
|
|
}
|
|
|
|
|
|
/*
|
|
* Handle executable code at "module-level". This refers to
|
|
* executable opcodes that appear outside of any control method.
|
|
*/
|
|
if ((WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2) &&
|
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((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:
|
|
|
|
/*
|
|
* Currently supported module-level opcodes are:
|
|
* IF/ELSE/WHILE. These appear to be the most common,
|
|
* and easiest to support since they open an AML
|
|
* package.
|
|
*/
|
|
if (WalkState->PassNumber == ACPI_IMODE_LOAD_PASS1)
|
|
{
|
|
AcpiPsLinkModuleCode (Op->Common.Parent, AmlOpStart,
|
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(UINT32) (WalkState->ParserState.PkgEnd - AmlOpStart),
|
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WalkState->OwnerId);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
|
|
"Pass1: Skipping an If/Else/While body\n"));
|
|
|
|
/* Skip body of if/else/while in pass 1 */
|
|
|
|
WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd;
|
|
WalkState->ArgCount = 0;
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* Check for an unsupported executable opcode at module
|
|
* level. We must be in PASS1, the parent must be a SCOPE,
|
|
* The opcode class must be EXECUTE, and the opcode must
|
|
* not be an argument to another opcode.
|
|
*/
|
|
if ((WalkState->PassNumber == ACPI_IMODE_LOAD_PASS1) &&
|
|
(Op->Common.Parent->Common.AmlOpcode == AML_SCOPE_OP))
|
|
{
|
|
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
|
|
if ((OpInfo->Class == AML_CLASS_EXECUTE) &&
|
|
(!Arg))
|
|
{
|
|
ACPI_WARNING ((AE_INFO,
|
|
"Detected an unsupported executable opcode "
|
|
"at module-level: [0x%.4X] at table offset 0x%.4X",
|
|
Op->Common.AmlOpcode,
|
|
(UINT32) (ACPI_PTR_DIFF (AmlOpStart,
|
|
WalkState->ParserState.AmlStart) +
|
|
sizeof (ACPI_TABLE_HEADER))));
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Special processing for certain opcodes */
|
|
|
|
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 = WalkState->ParserState.Aml;
|
|
Op->Named.Length = (UINT32)
|
|
(WalkState->ParserState.PkgEnd - WalkState->ParserState.Aml);
|
|
|
|
/* Skip body of method */
|
|
|
|
WalkState->ParserState.Aml = WalkState->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)
|
|
(WalkState->ParserState.PkgEnd - AmlOpStart);
|
|
|
|
/* Skip body */
|
|
|
|
WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd;
|
|
WalkState->ArgCount = 0;
|
|
}
|
|
break;
|
|
|
|
case AML_WHILE_OP:
|
|
|
|
if (WalkState->ControlState)
|
|
{
|
|
WalkState->ControlState->Control.PackageEnd =
|
|
WalkState->ParserState.PkgEnd;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
/* No action for all other opcodes */
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsLinkModuleCode
|
|
*
|
|
* PARAMETERS: ParentOp - Parent parser op
|
|
* AmlStart - Pointer to the AML
|
|
* AmlLength - Length of executable AML
|
|
* OwnerId - OwnerId of module level code
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Wrap the module-level code with a method object and link the
|
|
* object to the global list. Note, the mutex field of the method
|
|
* object is used to link multiple module-level code objects.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void
|
|
AcpiPsLinkModuleCode (
|
|
ACPI_PARSE_OBJECT *ParentOp,
|
|
UINT8 *AmlStart,
|
|
UINT32 AmlLength,
|
|
ACPI_OWNER_ID OwnerId)
|
|
{
|
|
ACPI_OPERAND_OBJECT *Prev;
|
|
ACPI_OPERAND_OBJECT *Next;
|
|
ACPI_OPERAND_OBJECT *MethodObj;
|
|
ACPI_NAMESPACE_NODE *ParentNode;
|
|
|
|
|
|
/* Get the tail of the list */
|
|
|
|
Prev = Next = AcpiGbl_ModuleCodeList;
|
|
while (Next)
|
|
{
|
|
Prev = Next;
|
|
Next = Next->Method.Mutex;
|
|
}
|
|
|
|
/*
|
|
* Insert the module level code into the list. Merge it if it is
|
|
* adjacent to the previous element.
|
|
*/
|
|
if (!Prev ||
|
|
((Prev->Method.AmlStart + Prev->Method.AmlLength) != AmlStart))
|
|
{
|
|
/* Create, initialize, and link a new temporary method object */
|
|
|
|
MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD);
|
|
if (!MethodObj)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (ParentOp->Common.Node)
|
|
{
|
|
ParentNode = ParentOp->Common.Node;
|
|
}
|
|
else
|
|
{
|
|
ParentNode = AcpiGbl_RootNode;
|
|
}
|
|
|
|
MethodObj->Method.AmlStart = AmlStart;
|
|
MethodObj->Method.AmlLength = AmlLength;
|
|
MethodObj->Method.OwnerId = OwnerId;
|
|
MethodObj->Method.InfoFlags |= ACPI_METHOD_MODULE_LEVEL;
|
|
|
|
/*
|
|
* Save the parent node in NextObject. This is cheating, but we
|
|
* don't want to expand the method object.
|
|
*/
|
|
MethodObj->Method.NextObject =
|
|
ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParentNode);
|
|
|
|
if (!Prev)
|
|
{
|
|
AcpiGbl_ModuleCodeList = MethodObj;
|
|
}
|
|
else
|
|
{
|
|
Prev->Method.Mutex = MethodObj;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Prev->Method.AmlLength += AmlLength;
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsCompleteOp
|
|
*
|
|
* PARAMETERS: WalkState - Current state
|
|
* Op - Returned Op
|
|
* Status - Parse status before complete Op
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Complete Op
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiPsCompleteOp (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_OBJECT **Op,
|
|
ACPI_STATUS Status)
|
|
{
|
|
ACPI_STATUS Status2;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (PsCompleteOp, WalkState);
|
|
|
|
|
|
/*
|
|
* Finished one argument of the containing scope
|
|
*/
|
|
WalkState->ParserState.Scope->ParseScope.ArgCount--;
|
|
|
|
/* 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 = NULL;
|
|
WalkState->PrevArgTypes = WalkState->ArgTypes;
|
|
return_ACPI_STATUS (Status);
|
|
|
|
|
|
case AE_CTRL_END:
|
|
|
|
AcpiPsPopScope (&(WalkState->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);
|
|
}
|
|
}
|
|
|
|
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 (&(WalkState->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);
|
|
}
|
|
|
|
Status = AE_OK;
|
|
break;
|
|
|
|
|
|
case AE_CTRL_TERMINATE:
|
|
|
|
/* Clean up */
|
|
do
|
|
{
|
|
if (*Op)
|
|
{
|
|
Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
|
|
if (ACPI_FAILURE (Status2))
|
|
{
|
|
return_ACPI_STATUS (Status2);
|
|
}
|
|
|
|
AcpiUtDeleteGenericState (
|
|
AcpiUtPopGenericState (&WalkState->ControlState));
|
|
}
|
|
|
|
AcpiPsPopScope (&(WalkState->ParserState), Op,
|
|
&WalkState->ArgTypes, &WalkState->ArgCount);
|
|
|
|
} while (*Op);
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
|
|
|
|
default: /* All other non-AE_OK status */
|
|
|
|
do
|
|
{
|
|
if (*Op)
|
|
{
|
|
Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
|
|
if (ACPI_FAILURE (Status2))
|
|
{
|
|
return_ACPI_STATUS (Status2);
|
|
}
|
|
}
|
|
|
|
AcpiPsPopScope (&(WalkState->ParserState), Op,
|
|
&WalkState->ArgTypes, &WalkState->ArgCount);
|
|
|
|
} while (*Op);
|
|
|
|
|
|
#if 0
|
|
/*
|
|
* TBD: Cleanup parse ops on error
|
|
*/
|
|
if (*Op == NULL)
|
|
{
|
|
AcpiPsPopScope (ParserState, Op,
|
|
&WalkState->ArgTypes, &WalkState->ArgCount);
|
|
}
|
|
#endif
|
|
WalkState->PrevOp = NULL;
|
|
WalkState->PrevArgTypes = WalkState->ArgTypes;
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* This scope complete? */
|
|
|
|
if (AcpiPsHasCompletedScope (&(WalkState->ParserState)))
|
|
{
|
|
AcpiPsPopScope (&(WalkState->ParserState), Op,
|
|
&WalkState->ArgTypes, &WalkState->ArgCount);
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *Op));
|
|
}
|
|
else
|
|
{
|
|
*Op = NULL;
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsCompleteFinalOp
|
|
*
|
|
* PARAMETERS: WalkState - Current state
|
|
* Op - Current Op
|
|
* Status - Current parse status before complete last
|
|
* Op
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Complete last Op.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiPsCompleteFinalOp (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_OBJECT *Op,
|
|
ACPI_STATUS Status)
|
|
{
|
|
ACPI_STATUS Status2;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (PsCompleteFinalOp, WalkState);
|
|
|
|
|
|
/*
|
|
* 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 = AcpiPsCompleteOp (WalkState, &Op, AE_OK);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
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 (&(WalkState->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 (&(WalkState->ParserState), &Op, &WalkState->ArgTypes,
|
|
&WalkState->ArgCount);
|
|
|
|
} while (Op);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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_PARSE_OBJECT *Op = NULL; /* current op */
|
|
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_EXCEPTION ((AE_INFO, Status,
|
|
"Invoked method did not return a value"));
|
|
}
|
|
|
|
ACPI_EXCEPTION ((AE_INFO, Status, "GetPredicate Failed"));
|
|
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)
|
|
{
|
|
Status = AcpiPsCreateOp (WalkState, AmlOpStart, &Op);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
if (Status == AE_CTRL_PARSE_CONTINUE)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (Status == AE_CTRL_PARSE_PENDING)
|
|
{
|
|
Status = AE_OK;
|
|
}
|
|
|
|
Status = AcpiPsCompleteOp (WalkState, &Op, Status);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
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 */
|
|
|
|
Status = AcpiPsGetArguments (WalkState, AmlOpStart, Op);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
Status = AcpiPsCompleteOp (WalkState, &Op, Status);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* 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))
|
|
{
|
|
Status = AcpiPsCompleteOp (WalkState, &Op, Status);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
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 ||
|
|
Op->Common.AmlOpcode == AML_DATA_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);
|
|
}
|
|
|
|
if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
|
|
{
|
|
/*
|
|
* Backup to beginning of BankField declaration
|
|
*
|
|
* 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;
|
|
}
|
|
}
|
|
|
|
Status = AcpiPsCompleteOp (WalkState, &Op, Status);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
} /* while ParserState->Aml */
|
|
|
|
Status = AcpiPsCompleteFinalOp (WalkState, Op, Status);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|