diff options
Diffstat (limited to 'source/components/parser/psargs.c')
| -rw-r--r-- | source/components/parser/psargs.c | 2010 |
1 files changed, 1005 insertions, 1005 deletions
diff --git a/source/components/parser/psargs.c b/source/components/parser/psargs.c index 0781aca8a..ad86a1fc3 100644 --- a/source/components/parser/psargs.c +++ b/source/components/parser/psargs.c @@ -1,1005 +1,1005 @@ -/******************************************************************************
- *
- * Module Name: psargs - Parse AML opcode arguments
- *
- *****************************************************************************/
-
-/******************************************************************************
- *
- * 1. Copyright Notice
- *
- * Some or all of this work - Copyright (c) 1999 - 2015, 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.
- *
- *****************************************************************************/
-
-#include "acpi.h"
-#include "accommon.h"
-#include "acparser.h"
-#include "amlcode.h"
-#include "acnamesp.h"
-#include "acdispat.h"
-
-#define _COMPONENT ACPI_PARSER
- ACPI_MODULE_NAME ("psargs")
-
-/* Local prototypes */
-
-static UINT32
-AcpiPsGetNextPackageLength (
- ACPI_PARSE_STATE *ParserState);
-
-static ACPI_PARSE_OBJECT *
-AcpiPsGetNextField (
- ACPI_PARSE_STATE *ParserState);
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiPsGetNextPackageLength
- *
- * PARAMETERS: ParserState - Current parser state object
- *
- * RETURN: Decoded package length. On completion, the AML pointer points
- * past the length byte or bytes.
- *
- * DESCRIPTION: Decode and return a package length field.
- * Note: Largest package length is 28 bits, from ACPI specification
- *
- ******************************************************************************/
-
-static UINT32
-AcpiPsGetNextPackageLength (
- ACPI_PARSE_STATE *ParserState)
-{
- UINT8 *Aml = ParserState->Aml;
- UINT32 PackageLength = 0;
- UINT32 ByteCount;
- UINT8 ByteZeroMask = 0x3F; /* Default [0:5] */
-
-
- ACPI_FUNCTION_TRACE (PsGetNextPackageLength);
-
-
- /*
- * Byte 0 bits [6:7] contain the number of additional bytes
- * used to encode the package length, either 0,1,2, or 3
- */
- ByteCount = (Aml[0] >> 6);
- ParserState->Aml += ((ACPI_SIZE) ByteCount + 1);
-
- /* Get bytes 3, 2, 1 as needed */
-
- while (ByteCount)
- {
- /*
- * Final bit positions for the package length bytes:
- * Byte3->[20:27]
- * Byte2->[12:19]
- * Byte1->[04:11]
- * Byte0->[00:03]
- */
- PackageLength |= (Aml[ByteCount] << ((ByteCount << 3) - 4));
-
- ByteZeroMask = 0x0F; /* Use bits [0:3] of byte 0 */
- ByteCount--;
- }
-
- /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */
-
- PackageLength |= (Aml[0] & ByteZeroMask);
- return_UINT32 (PackageLength);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiPsGetNextPackageEnd
- *
- * PARAMETERS: ParserState - Current parser state object
- *
- * RETURN: Pointer to end-of-package +1
- *
- * DESCRIPTION: Get next package length and return a pointer past the end of
- * the package. Consumes the package length field
- *
- ******************************************************************************/
-
-UINT8 *
-AcpiPsGetNextPackageEnd (
- ACPI_PARSE_STATE *ParserState)
-{
- UINT8 *Start = ParserState->Aml;
- UINT32 PackageLength;
-
-
- ACPI_FUNCTION_TRACE (PsGetNextPackageEnd);
-
-
- /* Function below updates ParserState->Aml */
-
- PackageLength = AcpiPsGetNextPackageLength (ParserState);
-
- return_PTR (Start + PackageLength); /* end of package */
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiPsGetNextNamestring
- *
- * PARAMETERS: ParserState - Current parser state object
- *
- * RETURN: Pointer to the start of the name string (pointer points into
- * the AML.
- *
- * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name
- * prefix characters. Set parser state to point past the string.
- * (Name is consumed from the AML.)
- *
- ******************************************************************************/
-
-char *
-AcpiPsGetNextNamestring (
- ACPI_PARSE_STATE *ParserState)
-{
- UINT8 *Start = ParserState->Aml;
- UINT8 *End = ParserState->Aml;
-
-
- ACPI_FUNCTION_TRACE (PsGetNextNamestring);
-
-
- /* Point past any namestring prefix characters (backslash or carat) */
-
- while (ACPI_IS_ROOT_PREFIX (*End) ||
- ACPI_IS_PARENT_PREFIX (*End))
- {
- End++;
- }
-
- /* Decode the path prefix character */
-
- switch (*End)
- {
- case 0:
-
- /* NullName */
-
- if (End == Start)
- {
- Start = NULL;
- }
- End++;
- break;
-
- case AML_DUAL_NAME_PREFIX:
-
- /* Two name segments */
-
- End += 1 + (2 * ACPI_NAME_SIZE);
- break;
-
- case AML_MULTI_NAME_PREFIX_OP:
-
- /* Multiple name segments, 4 chars each, count in next byte */
-
- End += 2 + (*(End + 1) * ACPI_NAME_SIZE);
- break;
-
- default:
-
- /* Single name segment */
-
- End += ACPI_NAME_SIZE;
- break;
- }
-
- ParserState->Aml = End;
- return_PTR ((char *) Start);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiPsGetNextNamepath
- *
- * PARAMETERS: ParserState - Current parser state object
- * Arg - Where the namepath will be stored
- * ArgCount - If the namepath points to a control method
- * the method's argument is returned here.
- * PossibleMethodCall - Whether the namepath can possibly be the
- * start of a method call
- *
- * RETURN: Status
- *
- * DESCRIPTION: Get next name (if method call, return # of required args).
- * Names are looked up in the internal namespace to determine
- * if the name represents a control method. If a method
- * is found, the number of arguments to the method is returned.
- * This information is critical for parsing to continue correctly.
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiPsGetNextNamepath (
- ACPI_WALK_STATE *WalkState,
- ACPI_PARSE_STATE *ParserState,
- ACPI_PARSE_OBJECT *Arg,
- BOOLEAN PossibleMethodCall)
-{
- ACPI_STATUS Status;
- char *Path;
- ACPI_PARSE_OBJECT *NameOp;
- ACPI_OPERAND_OBJECT *MethodDesc;
- ACPI_NAMESPACE_NODE *Node;
- UINT8 *Start = ParserState->Aml;
-
-
- ACPI_FUNCTION_TRACE (PsGetNextNamepath);
-
-
- Path = AcpiPsGetNextNamestring (ParserState);
- AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
-
- /* Null path case is allowed, just exit */
-
- if (!Path)
- {
- Arg->Common.Value.Name = Path;
- return_ACPI_STATUS (AE_OK);
- }
-
- /*
- * Lookup the name in the internal namespace, starting with the current
- * scope. We don't want to add anything new to the namespace here,
- * however, so we use MODE_EXECUTE.
- * Allow searching of the parent tree, but don't open a new scope -
- * we just want to lookup the object (must be mode EXECUTE to perform
- * the upsearch)
- */
- Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
- ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
- ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node);
-
- /*
- * If this name is a control method invocation, we must
- * setup the method call
- */
- if (ACPI_SUCCESS (Status) &&
- PossibleMethodCall &&
- (Node->Type == ACPI_TYPE_METHOD))
- {
- if (WalkState->Opcode == AML_UNLOAD_OP)
- {
- /*
- * AcpiPsGetNextNamestring has increased the AML pointer,
- * so we need to restore the saved AML pointer for method call.
- */
- WalkState->ParserState.Aml = Start;
- WalkState->ArgCount = 1;
- AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);
- return_ACPI_STATUS (AE_OK);
- }
-
- /* This name is actually a control method invocation */
-
- MethodDesc = AcpiNsGetAttachedObject (Node);
- ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
- "Control Method - %p Desc %p Path=%p\n", Node, MethodDesc, Path));
-
- NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP);
- if (!NameOp)
- {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
-
- /* Change Arg into a METHOD CALL and attach name to it */
-
- AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);
- NameOp->Common.Value.Name = Path;
-
- /* Point METHODCALL/NAME to the METHOD Node */
-
- NameOp->Common.Node = Node;
- AcpiPsAppendArg (Arg, NameOp);
-
- if (!MethodDesc)
- {
- ACPI_ERROR ((AE_INFO,
- "Control Method %p has no attached object",
- Node));
- return_ACPI_STATUS (AE_AML_INTERNAL);
- }
-
- ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
- "Control Method - %p Args %X\n",
- Node, MethodDesc->Method.ParamCount));
-
- /* Get the number of arguments to expect */
-
- WalkState->ArgCount = MethodDesc->Method.ParamCount;
- return_ACPI_STATUS (AE_OK);
- }
-
- /*
- * Special handling if the name was not found during the lookup -
- * some NotFound cases are allowed
- */
- if (Status == AE_NOT_FOUND)
- {
- /* 1) NotFound is ok during load pass 1/2 (allow forward references) */
-
- if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) !=
- ACPI_PARSE_EXECUTE)
- {
- Status = AE_OK;
- }
-
- /* 2) NotFound during a CondRefOf(x) is ok by definition */
-
- else if (WalkState->Op->Common.AmlOpcode == AML_COND_REF_OF_OP)
- {
- Status = AE_OK;
- }
-
- /*
- * 3) NotFound while building a Package is ok at this point, we
- * may flag as an error later if slack mode is not enabled.
- * (Some ASL code depends on allowing this behavior)
- */
- else if ((Arg->Common.Parent) &&
- ((Arg->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
- (Arg->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)))
- {
- Status = AE_OK;
- }
- }
-
- /* Final exception check (may have been changed from code above) */
-
- if (ACPI_FAILURE (Status))
- {
- ACPI_ERROR_NAMESPACE (Path, Status);
-
- if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) ==
- ACPI_PARSE_EXECUTE)
- {
- /* Report a control method execution error */
-
- Status = AcpiDsMethodError (Status, WalkState);
- }
- }
-
- /* Save the namepath */
-
- Arg->Common.Value.Name = Path;
- return_ACPI_STATUS (Status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiPsGetNextSimpleArg
- *
- * PARAMETERS: ParserState - Current parser state object
- * ArgType - The argument type (AML_*_ARG)
- * Arg - Where the argument is returned
- *
- * RETURN: None
- *
- * DESCRIPTION: Get the next simple argument (constant, string, or namestring)
- *
- ******************************************************************************/
-
-void
-AcpiPsGetNextSimpleArg (
- ACPI_PARSE_STATE *ParserState,
- UINT32 ArgType,
- ACPI_PARSE_OBJECT *Arg)
-{
- UINT32 Length;
- UINT16 Opcode;
- UINT8 *Aml = ParserState->Aml;
-
-
- ACPI_FUNCTION_TRACE_U32 (PsGetNextSimpleArg, ArgType);
-
-
- switch (ArgType)
- {
- case ARGP_BYTEDATA:
-
- /* Get 1 byte from the AML stream */
-
- Opcode = AML_BYTE_OP;
- Arg->Common.Value.Integer = (UINT64) *Aml;
- Length = 1;
- break;
-
- case ARGP_WORDDATA:
-
- /* Get 2 bytes from the AML stream */
-
- Opcode = AML_WORD_OP;
- ACPI_MOVE_16_TO_64 (&Arg->Common.Value.Integer, Aml);
- Length = 2;
- break;
-
- case ARGP_DWORDDATA:
-
- /* Get 4 bytes from the AML stream */
-
- Opcode = AML_DWORD_OP;
- ACPI_MOVE_32_TO_64 (&Arg->Common.Value.Integer, Aml);
- Length = 4;
- break;
-
- case ARGP_QWORDDATA:
-
- /* Get 8 bytes from the AML stream */
-
- Opcode = AML_QWORD_OP;
- ACPI_MOVE_64_TO_64 (&Arg->Common.Value.Integer, Aml);
- Length = 8;
- break;
-
- case ARGP_CHARLIST:
-
- /* Get a pointer to the string, point past the string */
-
- Opcode = AML_STRING_OP;
- Arg->Common.Value.String = ACPI_CAST_PTR (char, Aml);
-
- /* Find the null terminator */
-
- Length = 0;
- while (Aml[Length])
- {
- Length++;
- }
- Length++;
- break;
-
- case ARGP_NAME:
- case ARGP_NAMESTRING:
-
- AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
- Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState);
- return_VOID;
-
- default:
-
- ACPI_ERROR ((AE_INFO, "Invalid ArgType 0x%X", ArgType));
- return_VOID;
- }
-
- AcpiPsInitOp (Arg, Opcode);
- ParserState->Aml += Length;
- return_VOID;
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiPsGetNextField
- *
- * PARAMETERS: ParserState - Current parser state object
- *
- * RETURN: A newly allocated FIELD op
- *
- * DESCRIPTION: Get next field (NamedField, ReservedField, or AccessField)
- *
- ******************************************************************************/
-
-static ACPI_PARSE_OBJECT *
-AcpiPsGetNextField (
- ACPI_PARSE_STATE *ParserState)
-{
- UINT32 AmlOffset;
- ACPI_PARSE_OBJECT *Field;
- ACPI_PARSE_OBJECT *Arg = NULL;
- UINT16 Opcode;
- UINT32 Name;
- UINT8 AccessType;
- UINT8 AccessAttribute;
- UINT8 AccessLength;
- UINT32 PkgLength;
- UINT8 *PkgEnd;
- UINT32 BufferLength;
-
-
- ACPI_FUNCTION_TRACE (PsGetNextField);
-
-
- AmlOffset = (UINT32) ACPI_PTR_DIFF (
- ParserState->Aml, ParserState->AmlStart);
-
- /* Determine field type */
-
- switch (ACPI_GET8 (ParserState->Aml))
- {
- case AML_FIELD_OFFSET_OP:
-
- Opcode = AML_INT_RESERVEDFIELD_OP;
- ParserState->Aml++;
- break;
-
- case AML_FIELD_ACCESS_OP:
-
- Opcode = AML_INT_ACCESSFIELD_OP;
- ParserState->Aml++;
- break;
-
- case AML_FIELD_CONNECTION_OP:
-
- Opcode = AML_INT_CONNECTION_OP;
- ParserState->Aml++;
- break;
-
- case AML_FIELD_EXT_ACCESS_OP:
-
- Opcode = AML_INT_EXTACCESSFIELD_OP;
- ParserState->Aml++;
- break;
-
- default:
-
- Opcode = AML_INT_NAMEDFIELD_OP;
- break;
- }
-
- /* Allocate a new field op */
-
- Field = AcpiPsAllocOp (Opcode);
- if (!Field)
- {
- return_PTR (NULL);
- }
-
- Field->Common.AmlOffset = AmlOffset;
-
- /* Decode the field type */
-
- switch (Opcode)
- {
- case AML_INT_NAMEDFIELD_OP:
-
- /* Get the 4-character name */
-
- ACPI_MOVE_32_TO_32 (&Name, ParserState->Aml);
- AcpiPsSetName (Field, Name);
- ParserState->Aml += ACPI_NAME_SIZE;
-
- /* Get the length which is encoded as a package length */
-
- Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState);
- break;
-
-
- case AML_INT_RESERVEDFIELD_OP:
-
- /* Get the length which is encoded as a package length */
-
- Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState);
- break;
-
-
- case AML_INT_ACCESSFIELD_OP:
- case AML_INT_EXTACCESSFIELD_OP:
-
- /*
- * Get AccessType and AccessAttrib and merge into the field Op
- * AccessType is first operand, AccessAttribute is second. stuff
- * these bytes into the node integer value for convenience.
- */
-
- /* Get the two bytes (Type/Attribute) */
-
- AccessType = ACPI_GET8 (ParserState->Aml);
- ParserState->Aml++;
- AccessAttribute = ACPI_GET8 (ParserState->Aml);
- ParserState->Aml++;
-
- Field->Common.Value.Integer = (UINT8) AccessType;
- Field->Common.Value.Integer |= (UINT16) (AccessAttribute << 8);
-
- /* This opcode has a third byte, AccessLength */
-
- if (Opcode == AML_INT_EXTACCESSFIELD_OP)
- {
- AccessLength = ACPI_GET8 (ParserState->Aml);
- ParserState->Aml++;
-
- Field->Common.Value.Integer |= (UINT32) (AccessLength << 16);
- }
- break;
-
-
- case AML_INT_CONNECTION_OP:
-
- /*
- * Argument for Connection operator can be either a Buffer
- * (resource descriptor), or a NameString.
- */
- if (ACPI_GET8 (ParserState->Aml) == AML_BUFFER_OP)
- {
- ParserState->Aml++;
-
- PkgEnd = ParserState->Aml;
- PkgLength = AcpiPsGetNextPackageLength (ParserState);
- PkgEnd += PkgLength;
-
- if (ParserState->Aml < PkgEnd)
- {
- /* Non-empty list */
-
- Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP);
- if (!Arg)
- {
- AcpiPsFreeOp (Field);
- return_PTR (NULL);
- }
-
- /* Get the actual buffer length argument */
-
- Opcode = ACPI_GET8 (ParserState->Aml);
- ParserState->Aml++;
-
- switch (Opcode)
- {
- case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
-
- BufferLength = ACPI_GET8 (ParserState->Aml);
- ParserState->Aml += 1;
- break;
-
- case AML_WORD_OP: /* AML_WORDDATA_ARG */
-
- BufferLength = ACPI_GET16 (ParserState->Aml);
- ParserState->Aml += 2;
- break;
-
- case AML_DWORD_OP: /* AML_DWORDATA_ARG */
-
- BufferLength = ACPI_GET32 (ParserState->Aml);
- ParserState->Aml += 4;
- break;
-
- default:
-
- BufferLength = 0;
- break;
- }
-
- /* Fill in bytelist data */
-
- Arg->Named.Value.Size = BufferLength;
- Arg->Named.Data = ParserState->Aml;
- }
-
- /* Skip to End of byte data */
-
- ParserState->Aml = PkgEnd;
- }
- else
- {
- Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP);
- if (!Arg)
- {
- AcpiPsFreeOp (Field);
- return_PTR (NULL);
- }
-
- /* Get the Namestring argument */
-
- Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState);
- }
-
- /* Link the buffer/namestring to parent (CONNECTION_OP) */
-
- AcpiPsAppendArg (Field, Arg);
- break;
-
-
- default:
-
- /* Opcode was set in previous switch */
- break;
- }
-
- return_PTR (Field);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiPsGetNextArg
- *
- * PARAMETERS: WalkState - Current state
- * ParserState - Current parser state object
- * ArgType - The argument type (AML_*_ARG)
- * ReturnArg - Where the next arg is returned
- *
- * RETURN: Status, and an op object containing the next argument.
- *
- * DESCRIPTION: Get next argument (including complex list arguments that require
- * pushing the parser stack)
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiPsGetNextArg (
- ACPI_WALK_STATE *WalkState,
- ACPI_PARSE_STATE *ParserState,
- UINT32 ArgType,
- ACPI_PARSE_OBJECT **ReturnArg)
-{
- ACPI_PARSE_OBJECT *Arg = NULL;
- ACPI_PARSE_OBJECT *Prev = NULL;
- ACPI_PARSE_OBJECT *Field;
- UINT32 Subop;
- ACPI_STATUS Status = AE_OK;
-
-
- ACPI_FUNCTION_TRACE_PTR (PsGetNextArg, ParserState);
-
-
- switch (ArgType)
- {
- case ARGP_BYTEDATA:
- case ARGP_WORDDATA:
- case ARGP_DWORDDATA:
- case ARGP_CHARLIST:
- case ARGP_NAME:
- case ARGP_NAMESTRING:
-
- /* Constants, strings, and namestrings are all the same size */
-
- Arg = AcpiPsAllocOp (AML_BYTE_OP);
- if (!Arg)
- {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
- AcpiPsGetNextSimpleArg (ParserState, ArgType, Arg);
- break;
-
- case ARGP_PKGLENGTH:
-
- /* Package length, nothing returned */
-
- ParserState->PkgEnd = AcpiPsGetNextPackageEnd (ParserState);
- break;
-
- case ARGP_FIELDLIST:
-
- if (ParserState->Aml < ParserState->PkgEnd)
- {
- /* Non-empty list */
-
- while (ParserState->Aml < ParserState->PkgEnd)
- {
- Field = AcpiPsGetNextField (ParserState);
- if (!Field)
- {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
-
- if (Prev)
- {
- Prev->Common.Next = Field;
- }
- else
- {
- Arg = Field;
- }
- Prev = Field;
- }
-
- /* Skip to End of byte data */
-
- ParserState->Aml = ParserState->PkgEnd;
- }
- break;
-
- case ARGP_BYTELIST:
-
- if (ParserState->Aml < ParserState->PkgEnd)
- {
- /* Non-empty list */
-
- Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP);
- if (!Arg)
- {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
-
- /* Fill in bytelist data */
-
- Arg->Common.Value.Size = (UINT32)
- ACPI_PTR_DIFF (ParserState->PkgEnd, ParserState->Aml);
- Arg->Named.Data = ParserState->Aml;
-
- /* Skip to End of byte data */
-
- ParserState->Aml = ParserState->PkgEnd;
- }
- break;
-
- case ARGP_TARGET:
- case ARGP_SUPERNAME:
- case ARGP_SIMPLENAME:
-
- Subop = AcpiPsPeekOpcode (ParserState);
- if (Subop == 0 ||
- AcpiPsIsLeadingChar (Subop) ||
- ACPI_IS_ROOT_PREFIX (Subop) ||
- ACPI_IS_PARENT_PREFIX (Subop))
- {
- /* NullName or NameString */
-
- Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP);
- if (!Arg)
- {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
-
- /* To support SuperName arg of Unload */
-
- if (WalkState->Opcode == AML_UNLOAD_OP)
- {
- Status = AcpiPsGetNextNamepath (WalkState, ParserState, Arg, 1);
-
- /*
- * If the SuperName arg of Unload is a method call,
- * we have restored the AML pointer, just free this Arg
- */
- if (Arg->Common.AmlOpcode == AML_INT_METHODCALL_OP)
- {
- AcpiPsFreeOp (Arg);
- Arg = NULL;
- }
- }
- else
- {
- Status = AcpiPsGetNextNamepath (WalkState, ParserState, Arg, 0);
- }
- }
- else
- {
- /* Single complex argument, nothing returned */
-
- WalkState->ArgCount = 1;
- }
- break;
-
- case ARGP_DATAOBJ:
- case ARGP_TERMARG:
-
- /* Single complex argument, nothing returned */
-
- WalkState->ArgCount = 1;
- break;
-
- case ARGP_DATAOBJLIST:
- case ARGP_TERMLIST:
- case ARGP_OBJLIST:
-
- if (ParserState->Aml < ParserState->PkgEnd)
- {
- /* Non-empty list of variable arguments, nothing returned */
-
- WalkState->ArgCount = ACPI_VAR_ARGS;
- }
- break;
-
- default:
-
- ACPI_ERROR ((AE_INFO, "Invalid ArgType: 0x%X", ArgType));
- Status = AE_AML_OPERAND_TYPE;
- break;
- }
-
- *ReturnArg = Arg;
- return_ACPI_STATUS (Status);
-}
+/****************************************************************************** + * + * Module Name: psargs - Parse AML opcode arguments + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2014, 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. + * + *****************************************************************************/ + +#include "acpi.h" +#include "accommon.h" +#include "acparser.h" +#include "amlcode.h" +#include "acnamesp.h" +#include "acdispat.h" + +#define _COMPONENT ACPI_PARSER + ACPI_MODULE_NAME ("psargs") + +/* Local prototypes */ + +static UINT32 +AcpiPsGetNextPackageLength ( + ACPI_PARSE_STATE *ParserState); + +static ACPI_PARSE_OBJECT * +AcpiPsGetNextField ( + ACPI_PARSE_STATE *ParserState); + + +/******************************************************************************* + * + * FUNCTION: AcpiPsGetNextPackageLength + * + * PARAMETERS: ParserState - Current parser state object + * + * RETURN: Decoded package length. On completion, the AML pointer points + * past the length byte or bytes. + * + * DESCRIPTION: Decode and return a package length field. + * Note: Largest package length is 28 bits, from ACPI specification + * + ******************************************************************************/ + +static UINT32 +AcpiPsGetNextPackageLength ( + ACPI_PARSE_STATE *ParserState) +{ + UINT8 *Aml = ParserState->Aml; + UINT32 PackageLength = 0; + UINT32 ByteCount; + UINT8 ByteZeroMask = 0x3F; /* Default [0:5] */ + + + ACPI_FUNCTION_TRACE (PsGetNextPackageLength); + + + /* + * Byte 0 bits [6:7] contain the number of additional bytes + * used to encode the package length, either 0,1,2, or 3 + */ + ByteCount = (Aml[0] >> 6); + ParserState->Aml += ((ACPI_SIZE) ByteCount + 1); + + /* Get bytes 3, 2, 1 as needed */ + + while (ByteCount) + { + /* + * Final bit positions for the package length bytes: + * Byte3->[20:27] + * Byte2->[12:19] + * Byte1->[04:11] + * Byte0->[00:03] + */ + PackageLength |= (Aml[ByteCount] << ((ByteCount << 3) - 4)); + + ByteZeroMask = 0x0F; /* Use bits [0:3] of byte 0 */ + ByteCount--; + } + + /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */ + + PackageLength |= (Aml[0] & ByteZeroMask); + return_UINT32 (PackageLength); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiPsGetNextPackageEnd + * + * PARAMETERS: ParserState - Current parser state object + * + * RETURN: Pointer to end-of-package +1 + * + * DESCRIPTION: Get next package length and return a pointer past the end of + * the package. Consumes the package length field + * + ******************************************************************************/ + +UINT8 * +AcpiPsGetNextPackageEnd ( + ACPI_PARSE_STATE *ParserState) +{ + UINT8 *Start = ParserState->Aml; + UINT32 PackageLength; + + + ACPI_FUNCTION_TRACE (PsGetNextPackageEnd); + + + /* Function below updates ParserState->Aml */ + + PackageLength = AcpiPsGetNextPackageLength (ParserState); + + return_PTR (Start + PackageLength); /* end of package */ +} + + +/******************************************************************************* + * + * FUNCTION: AcpiPsGetNextNamestring + * + * PARAMETERS: ParserState - Current parser state object + * + * RETURN: Pointer to the start of the name string (pointer points into + * the AML. + * + * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name + * prefix characters. Set parser state to point past the string. + * (Name is consumed from the AML.) + * + ******************************************************************************/ + +char * +AcpiPsGetNextNamestring ( + ACPI_PARSE_STATE *ParserState) +{ + UINT8 *Start = ParserState->Aml; + UINT8 *End = ParserState->Aml; + + + ACPI_FUNCTION_TRACE (PsGetNextNamestring); + + + /* Point past any namestring prefix characters (backslash or carat) */ + + while (ACPI_IS_ROOT_PREFIX (*End) || + ACPI_IS_PARENT_PREFIX (*End)) + { + End++; + } + + /* Decode the path prefix character */ + + switch (*End) + { + case 0: + + /* NullName */ + + if (End == Start) + { + Start = NULL; + } + End++; + break; + + case AML_DUAL_NAME_PREFIX: + + /* Two name segments */ + + End += 1 + (2 * ACPI_NAME_SIZE); + break; + + case AML_MULTI_NAME_PREFIX_OP: + + /* Multiple name segments, 4 chars each, count in next byte */ + + End += 2 + (*(End + 1) * ACPI_NAME_SIZE); + break; + + default: + + /* Single name segment */ + + End += ACPI_NAME_SIZE; + break; + } + + ParserState->Aml = End; + return_PTR ((char *) Start); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiPsGetNextNamepath + * + * PARAMETERS: ParserState - Current parser state object + * Arg - Where the namepath will be stored + * ArgCount - If the namepath points to a control method + * the method's argument is returned here. + * PossibleMethodCall - Whether the namepath can possibly be the + * start of a method call + * + * RETURN: Status + * + * DESCRIPTION: Get next name (if method call, return # of required args). + * Names are looked up in the internal namespace to determine + * if the name represents a control method. If a method + * is found, the number of arguments to the method is returned. + * This information is critical for parsing to continue correctly. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiPsGetNextNamepath ( + ACPI_WALK_STATE *WalkState, + ACPI_PARSE_STATE *ParserState, + ACPI_PARSE_OBJECT *Arg, + BOOLEAN PossibleMethodCall) +{ + ACPI_STATUS Status; + char *Path; + ACPI_PARSE_OBJECT *NameOp; + ACPI_OPERAND_OBJECT *MethodDesc; + ACPI_NAMESPACE_NODE *Node; + UINT8 *Start = ParserState->Aml; + + + ACPI_FUNCTION_TRACE (PsGetNextNamepath); + + + Path = AcpiPsGetNextNamestring (ParserState); + AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); + + /* Null path case is allowed, just exit */ + + if (!Path) + { + Arg->Common.Value.Name = Path; + return_ACPI_STATUS (AE_OK); + } + + /* + * Lookup the name in the internal namespace, starting with the current + * scope. We don't want to add anything new to the namespace here, + * however, so we use MODE_EXECUTE. + * Allow searching of the parent tree, but don't open a new scope - + * we just want to lookup the object (must be mode EXECUTE to perform + * the upsearch) + */ + Status = AcpiNsLookup (WalkState->ScopeInfo, Path, + ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node); + + /* + * If this name is a control method invocation, we must + * setup the method call + */ + if (ACPI_SUCCESS (Status) && + PossibleMethodCall && + (Node->Type == ACPI_TYPE_METHOD)) + { + if (WalkState->Opcode == AML_UNLOAD_OP) + { + /* + * AcpiPsGetNextNamestring has increased the AML pointer, + * so we need to restore the saved AML pointer for method call. + */ + WalkState->ParserState.Aml = Start; + WalkState->ArgCount = 1; + AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); + return_ACPI_STATUS (AE_OK); + } + + /* This name is actually a control method invocation */ + + MethodDesc = AcpiNsGetAttachedObject (Node); + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, + "Control Method - %p Desc %p Path=%p\n", Node, MethodDesc, Path)); + + NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP); + if (!NameOp) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Change Arg into a METHOD CALL and attach name to it */ + + AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); + NameOp->Common.Value.Name = Path; + + /* Point METHODCALL/NAME to the METHOD Node */ + + NameOp->Common.Node = Node; + AcpiPsAppendArg (Arg, NameOp); + + if (!MethodDesc) + { + ACPI_ERROR ((AE_INFO, + "Control Method %p has no attached object", + Node)); + return_ACPI_STATUS (AE_AML_INTERNAL); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, + "Control Method - %p Args %X\n", + Node, MethodDesc->Method.ParamCount)); + + /* Get the number of arguments to expect */ + + WalkState->ArgCount = MethodDesc->Method.ParamCount; + return_ACPI_STATUS (AE_OK); + } + + /* + * Special handling if the name was not found during the lookup - + * some NotFound cases are allowed + */ + if (Status == AE_NOT_FOUND) + { + /* 1) NotFound is ok during load pass 1/2 (allow forward references) */ + + if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) != + ACPI_PARSE_EXECUTE) + { + Status = AE_OK; + } + + /* 2) NotFound during a CondRefOf(x) is ok by definition */ + + else if (WalkState->Op->Common.AmlOpcode == AML_COND_REF_OF_OP) + { + Status = AE_OK; + } + + /* + * 3) NotFound while building a Package is ok at this point, we + * may flag as an error later if slack mode is not enabled. + * (Some ASL code depends on allowing this behavior) + */ + else if ((Arg->Common.Parent) && + ((Arg->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || + (Arg->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))) + { + Status = AE_OK; + } + } + + /* Final exception check (may have been changed from code above) */ + + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE (Path, Status); + + if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) == + ACPI_PARSE_EXECUTE) + { + /* Report a control method execution error */ + + Status = AcpiDsMethodError (Status, WalkState); + } + } + + /* Save the namepath */ + + Arg->Common.Value.Name = Path; + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiPsGetNextSimpleArg + * + * PARAMETERS: ParserState - Current parser state object + * ArgType - The argument type (AML_*_ARG) + * Arg - Where the argument is returned + * + * RETURN: None + * + * DESCRIPTION: Get the next simple argument (constant, string, or namestring) + * + ******************************************************************************/ + +void +AcpiPsGetNextSimpleArg ( + ACPI_PARSE_STATE *ParserState, + UINT32 ArgType, + ACPI_PARSE_OBJECT *Arg) +{ + UINT32 Length; + UINT16 Opcode; + UINT8 *Aml = ParserState->Aml; + + + ACPI_FUNCTION_TRACE_U32 (PsGetNextSimpleArg, ArgType); + + + switch (ArgType) + { + case ARGP_BYTEDATA: + + /* Get 1 byte from the AML stream */ + + Opcode = AML_BYTE_OP; + Arg->Common.Value.Integer = (UINT64) *Aml; + Length = 1; + break; + + case ARGP_WORDDATA: + + /* Get 2 bytes from the AML stream */ + + Opcode = AML_WORD_OP; + ACPI_MOVE_16_TO_64 (&Arg->Common.Value.Integer, Aml); + Length = 2; + break; + + case ARGP_DWORDDATA: + + /* Get 4 bytes from the AML stream */ + + Opcode = AML_DWORD_OP; + ACPI_MOVE_32_TO_64 (&Arg->Common.Value.Integer, Aml); + Length = 4; + break; + + case ARGP_QWORDDATA: + + /* Get 8 bytes from the AML stream */ + + Opcode = AML_QWORD_OP; + ACPI_MOVE_64_TO_64 (&Arg->Common.Value.Integer, Aml); + Length = 8; + break; + + case ARGP_CHARLIST: + + /* Get a pointer to the string, point past the string */ + + Opcode = AML_STRING_OP; + Arg->Common.Value.String = ACPI_CAST_PTR (char, Aml); + + /* Find the null terminator */ + + Length = 0; + while (Aml[Length]) + { + Length++; + } + Length++; + break; + + case ARGP_NAME: + case ARGP_NAMESTRING: + + AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); + Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState); + return_VOID; + + default: + + ACPI_ERROR ((AE_INFO, "Invalid ArgType 0x%X", ArgType)); + return_VOID; + } + + AcpiPsInitOp (Arg, Opcode); + ParserState->Aml += Length; + return_VOID; +} + + +/******************************************************************************* + * + * FUNCTION: AcpiPsGetNextField + * + * PARAMETERS: ParserState - Current parser state object + * + * RETURN: A newly allocated FIELD op + * + * DESCRIPTION: Get next field (NamedField, ReservedField, or AccessField) + * + ******************************************************************************/ + +static ACPI_PARSE_OBJECT * +AcpiPsGetNextField ( + ACPI_PARSE_STATE *ParserState) +{ + UINT32 AmlOffset; + ACPI_PARSE_OBJECT *Field; + ACPI_PARSE_OBJECT *Arg = NULL; + UINT16 Opcode; + UINT32 Name; + UINT8 AccessType; + UINT8 AccessAttribute; + UINT8 AccessLength; + UINT32 PkgLength; + UINT8 *PkgEnd; + UINT32 BufferLength; + + + ACPI_FUNCTION_TRACE (PsGetNextField); + + + AmlOffset = (UINT32) ACPI_PTR_DIFF ( + ParserState->Aml, ParserState->AmlStart); + + /* Determine field type */ + + switch (ACPI_GET8 (ParserState->Aml)) + { + case AML_FIELD_OFFSET_OP: + + Opcode = AML_INT_RESERVEDFIELD_OP; + ParserState->Aml++; + break; + + case AML_FIELD_ACCESS_OP: + + Opcode = AML_INT_ACCESSFIELD_OP; + ParserState->Aml++; + break; + + case AML_FIELD_CONNECTION_OP: + + Opcode = AML_INT_CONNECTION_OP; + ParserState->Aml++; + break; + + case AML_FIELD_EXT_ACCESS_OP: + + Opcode = AML_INT_EXTACCESSFIELD_OP; + ParserState->Aml++; + break; + + default: + + Opcode = AML_INT_NAMEDFIELD_OP; + break; + } + + /* Allocate a new field op */ + + Field = AcpiPsAllocOp (Opcode); + if (!Field) + { + return_PTR (NULL); + } + + Field->Common.AmlOffset = AmlOffset; + + /* Decode the field type */ + + switch (Opcode) + { + case AML_INT_NAMEDFIELD_OP: + + /* Get the 4-character name */ + + ACPI_MOVE_32_TO_32 (&Name, ParserState->Aml); + AcpiPsSetName (Field, Name); + ParserState->Aml += ACPI_NAME_SIZE; + + /* Get the length which is encoded as a package length */ + + Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState); + break; + + + case AML_INT_RESERVEDFIELD_OP: + + /* Get the length which is encoded as a package length */ + + Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState); + break; + + + case AML_INT_ACCESSFIELD_OP: + case AML_INT_EXTACCESSFIELD_OP: + + /* + * Get AccessType and AccessAttrib and merge into the field Op + * AccessType is first operand, AccessAttribute is second. stuff + * these bytes into the node integer value for convenience. + */ + + /* Get the two bytes (Type/Attribute) */ + + AccessType = ACPI_GET8 (ParserState->Aml); + ParserState->Aml++; + AccessAttribute = ACPI_GET8 (ParserState->Aml); + ParserState->Aml++; + + Field->Common.Value.Integer = (UINT8) AccessType; + Field->Common.Value.Integer |= (UINT16) (AccessAttribute << 8); + + /* This opcode has a third byte, AccessLength */ + + if (Opcode == AML_INT_EXTACCESSFIELD_OP) + { + AccessLength = ACPI_GET8 (ParserState->Aml); + ParserState->Aml++; + + Field->Common.Value.Integer |= (UINT32) (AccessLength << 16); + } + break; + + + case AML_INT_CONNECTION_OP: + + /* + * Argument for Connection operator can be either a Buffer + * (resource descriptor), or a NameString. + */ + if (ACPI_GET8 (ParserState->Aml) == AML_BUFFER_OP) + { + ParserState->Aml++; + + PkgEnd = ParserState->Aml; + PkgLength = AcpiPsGetNextPackageLength (ParserState); + PkgEnd += PkgLength; + + if (ParserState->Aml < PkgEnd) + { + /* Non-empty list */ + + Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP); + if (!Arg) + { + AcpiPsFreeOp (Field); + return_PTR (NULL); + } + + /* Get the actual buffer length argument */ + + Opcode = ACPI_GET8 (ParserState->Aml); + ParserState->Aml++; + + switch (Opcode) + { + case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ + + BufferLength = ACPI_GET8 (ParserState->Aml); + ParserState->Aml += 1; + break; + + case AML_WORD_OP: /* AML_WORDDATA_ARG */ + + BufferLength = ACPI_GET16 (ParserState->Aml); + ParserState->Aml += 2; + break; + + case AML_DWORD_OP: /* AML_DWORDATA_ARG */ + + BufferLength = ACPI_GET32 (ParserState->Aml); + ParserState->Aml += 4; + break; + + default: + + BufferLength = 0; + break; + } + + /* Fill in bytelist data */ + + Arg->Named.Value.Size = BufferLength; + Arg->Named.Data = ParserState->Aml; + } + + /* Skip to End of byte data */ + + ParserState->Aml = PkgEnd; + } + else + { + Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP); + if (!Arg) + { + AcpiPsFreeOp (Field); + return_PTR (NULL); + } + + /* Get the Namestring argument */ + + Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState); + } + + /* Link the buffer/namestring to parent (CONNECTION_OP) */ + + AcpiPsAppendArg (Field, Arg); + break; + + + default: + + /* Opcode was set in previous switch */ + break; + } + + return_PTR (Field); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiPsGetNextArg + * + * PARAMETERS: WalkState - Current state + * ParserState - Current parser state object + * ArgType - The argument type (AML_*_ARG) + * ReturnArg - Where the next arg is returned + * + * RETURN: Status, and an op object containing the next argument. + * + * DESCRIPTION: Get next argument (including complex list arguments that require + * pushing the parser stack) + * + ******************************************************************************/ + +ACPI_STATUS +AcpiPsGetNextArg ( + ACPI_WALK_STATE *WalkState, + ACPI_PARSE_STATE *ParserState, + UINT32 ArgType, + ACPI_PARSE_OBJECT **ReturnArg) +{ + ACPI_PARSE_OBJECT *Arg = NULL; + ACPI_PARSE_OBJECT *Prev = NULL; + ACPI_PARSE_OBJECT *Field; + UINT32 Subop; + ACPI_STATUS Status = AE_OK; + + + ACPI_FUNCTION_TRACE_PTR (PsGetNextArg, ParserState); + + + switch (ArgType) + { + case ARGP_BYTEDATA: + case ARGP_WORDDATA: + case ARGP_DWORDDATA: + case ARGP_CHARLIST: + case ARGP_NAME: + case ARGP_NAMESTRING: + + /* Constants, strings, and namestrings are all the same size */ + + Arg = AcpiPsAllocOp (AML_BYTE_OP); + if (!Arg) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + AcpiPsGetNextSimpleArg (ParserState, ArgType, Arg); + break; + + case ARGP_PKGLENGTH: + + /* Package length, nothing returned */ + + ParserState->PkgEnd = AcpiPsGetNextPackageEnd (ParserState); + break; + + case ARGP_FIELDLIST: + + if (ParserState->Aml < ParserState->PkgEnd) + { + /* Non-empty list */ + + while (ParserState->Aml < ParserState->PkgEnd) + { + Field = AcpiPsGetNextField (ParserState); + if (!Field) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + if (Prev) + { + Prev->Common.Next = Field; + } + else + { + Arg = Field; + } + Prev = Field; + } + + /* Skip to End of byte data */ + + ParserState->Aml = ParserState->PkgEnd; + } + break; + + case ARGP_BYTELIST: + + if (ParserState->Aml < ParserState->PkgEnd) + { + /* Non-empty list */ + + Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP); + if (!Arg) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Fill in bytelist data */ + + Arg->Common.Value.Size = (UINT32) + ACPI_PTR_DIFF (ParserState->PkgEnd, ParserState->Aml); + Arg->Named.Data = ParserState->Aml; + + /* Skip to End of byte data */ + + ParserState->Aml = ParserState->PkgEnd; + } + break; + + case ARGP_TARGET: + case ARGP_SUPERNAME: + case ARGP_SIMPLENAME: + + Subop = AcpiPsPeekOpcode (ParserState); + if (Subop == 0 || + AcpiPsIsLeadingChar (Subop) || + ACPI_IS_ROOT_PREFIX (Subop) || + ACPI_IS_PARENT_PREFIX (Subop)) + { + /* NullName or NameString */ + + Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP); + if (!Arg) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* To support SuperName arg of Unload */ + + if (WalkState->Opcode == AML_UNLOAD_OP) + { + Status = AcpiPsGetNextNamepath (WalkState, ParserState, Arg, 1); + + /* + * If the SuperName arg of Unload is a method call, + * we have restored the AML pointer, just free this Arg + */ + if (Arg->Common.AmlOpcode == AML_INT_METHODCALL_OP) + { + AcpiPsFreeOp (Arg); + Arg = NULL; + } + } + else + { + Status = AcpiPsGetNextNamepath (WalkState, ParserState, Arg, 0); + } + } + else + { + /* Single complex argument, nothing returned */ + + WalkState->ArgCount = 1; + } + break; + + case ARGP_DATAOBJ: + case ARGP_TERMARG: + + /* Single complex argument, nothing returned */ + + WalkState->ArgCount = 1; + break; + + case ARGP_DATAOBJLIST: + case ARGP_TERMLIST: + case ARGP_OBJLIST: + + if (ParserState->Aml < ParserState->PkgEnd) + { + /* Non-empty list of variable arguments, nothing returned */ + + WalkState->ArgCount = ACPI_VAR_ARGS; + } + break; + + default: + + ACPI_ERROR ((AE_INFO, "Invalid ArgType: 0x%X", ArgType)); + Status = AE_AML_OPERAND_TYPE; + break; + } + + *ReturnArg = Arg; + return_ACPI_STATUS (Status); +} |