diff options
Diffstat (limited to 'sys/contrib/dev/acpica/components/parser/psargs.c')
| -rw-r--r-- | sys/contrib/dev/acpica/components/parser/psargs.c | 940 |
1 files changed, 940 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/parser/psargs.c b/sys/contrib/dev/acpica/components/parser/psargs.c new file mode 100644 index 0000000..f3f7015 --- /dev/null +++ b/sys/contrib/dev/acpica/components/parser/psargs.c @@ -0,0 +1,940 @@ +/****************************************************************************** + * + * Module Name: psargs - Parse AML opcode arguments + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#define __PSARGS_C__ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acparser.h> +#include <contrib/dev/acpica/include/amlcode.h> +#include <contrib/dev/acpica/include/acnamesp.h> +#include <contrib/dev/acpica/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 (AcpiPsIsPrefixChar (*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) + { + 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) + { + 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) || + AcpiPsIsPrefixChar (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); +} |
