diff options
Diffstat (limited to 'usr/src/common/acpica/dispatcher/dsfield.c')
| -rw-r--r-- | usr/src/common/acpica/dispatcher/dsfield.c | 839 |
1 files changed, 839 insertions, 0 deletions
diff --git a/usr/src/common/acpica/dispatcher/dsfield.c b/usr/src/common/acpica/dispatcher/dsfield.c new file mode 100644 index 0000000000..2516c131dc --- /dev/null +++ b/usr/src/common/acpica/dispatcher/dsfield.c @@ -0,0 +1,839 @@ +/****************************************************************************** + * + * Module Name: dsfield - Dispatcher field routines + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2016, 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. + */ + +#include "acpi.h" +#include "accommon.h" +#include "amlcode.h" +#include "acdispat.h" +#include "acinterp.h" +#include "acnamesp.h" +#include "acparser.h" + + +#define _COMPONENT ACPI_DISPATCHER + ACPI_MODULE_NAME ("dsfield") + +/* Local prototypes */ + +#ifdef ACPI_ASL_COMPILER +#include "acdisasm.h" + +static ACPI_STATUS +AcpiDsCreateExternalRegion ( + ACPI_STATUS LookupStatus, + ACPI_PARSE_OBJECT *Op, + char *Path, + ACPI_WALK_STATE *WalkState, + ACPI_NAMESPACE_NODE **Node); +#endif + +static ACPI_STATUS +AcpiDsGetFieldNames ( + ACPI_CREATE_FIELD_INFO *Info, + ACPI_WALK_STATE *WalkState, + ACPI_PARSE_OBJECT *Arg); + + +#ifdef ACPI_ASL_COMPILER +/******************************************************************************* + * + * FUNCTION: AcpiDsCreateExternalRegion (iASL Disassembler only) + * + * PARAMETERS: LookupStatus - Status from NsLookup operation + * Op - Op containing the Field definition and args + * Path - Pathname of the region + * ` WalkState - Current method state + * Node - Where the new region node is returned + * + * RETURN: Status + * + * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new + * region node/object. + * + ******************************************************************************/ + +static ACPI_STATUS +AcpiDsCreateExternalRegion ( + ACPI_STATUS LookupStatus, + ACPI_PARSE_OBJECT *Op, + char *Path, + ACPI_WALK_STATE *WalkState, + ACPI_NAMESPACE_NODE **Node) +{ + ACPI_STATUS Status; + ACPI_OPERAND_OBJECT *ObjDesc; + + + if (LookupStatus != AE_NOT_FOUND) + { + return (LookupStatus); + } + + /* + * Table disassembly: + * OperationRegion not found. Generate an External for it, and + * insert the name into the namespace. + */ + AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_REGION, 0, 0); + + Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION, + ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + /* Must create and install a region object for the new node */ + + ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); + if (!ObjDesc) + { + return (AE_NO_MEMORY); + } + + ObjDesc->Region.Node = *Node; + Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION); + return (Status); +} +#endif + + +/******************************************************************************* + * + * FUNCTION: AcpiDsCreateBufferField + * + * PARAMETERS: Op - Current parse op (CreateXXField) + * WalkState - Current state + * + * RETURN: Status + * + * DESCRIPTION: Execute the CreateField operators: + * CreateBitFieldOp, + * CreateByteFieldOp, + * CreateWordFieldOp, + * CreateDwordFieldOp, + * CreateQwordFieldOp, + * CreateFieldOp (all of which define a field in a buffer) + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsCreateBufferField ( + ACPI_PARSE_OBJECT *Op, + ACPI_WALK_STATE *WalkState) +{ + ACPI_PARSE_OBJECT *Arg; + ACPI_NAMESPACE_NODE *Node; + ACPI_STATUS Status; + ACPI_OPERAND_OBJECT *ObjDesc; + ACPI_OPERAND_OBJECT *SecondDesc = NULL; + UINT32 Flags; + + + ACPI_FUNCTION_TRACE (DsCreateBufferField); + + + /* + * Get the NameString argument (name of the new BufferField) + */ + if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP) + { + /* For CreateField, name is the 4th argument */ + + Arg = AcpiPsGetArg (Op, 3); + } + else + { + /* For all other CreateXXXField operators, name is the 3rd argument */ + + Arg = AcpiPsGetArg (Op, 2); + } + + if (!Arg) + { + return_ACPI_STATUS (AE_AML_NO_OPERAND); + } + + if (WalkState->DeferredNode) + { + Node = WalkState->DeferredNode; + Status = AE_OK; + } + else + { + /* Execute flag should always be set when this function is entered */ + + if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) + { + return_ACPI_STATUS (AE_AML_INTERNAL); + } + + /* Creating new namespace node, should not already exist */ + + Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | + ACPI_NS_ERROR_IF_FOUND; + + /* + * Mark node temporary if we are executing a normal control + * method. (Don't mark if this is a module-level code method) + */ + if (WalkState->MethodNode && + !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) + { + Flags |= ACPI_NS_TEMPORARY; + } + + /* Enter the NameString into the namespace */ + + Status = AcpiNsLookup (WalkState->ScopeInfo, + Arg->Common.Value.String, ACPI_TYPE_ANY, + ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node); + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); + return_ACPI_STATUS (Status); + } + } + + /* + * We could put the returned object (Node) on the object stack for later, + * but for now, we will put it in the "op" object that the parser uses, + * so we can get it again at the end of this scope. + */ + Op->Common.Node = Node; + + /* + * If there is no object attached to the node, this node was just created + * and we need to create the field object. Otherwise, this was a lookup + * of an existing node and we don't want to create the field object again. + */ + ObjDesc = AcpiNsGetAttachedObject (Node); + if (ObjDesc) + { + return_ACPI_STATUS (AE_OK); + } + + /* + * The Field definition is not fully parsed at this time. + * (We must save the address of the AML for the buffer and index operands) + */ + + /* Create the buffer field object */ + + ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD); + if (!ObjDesc) + { + Status = AE_NO_MEMORY; + goto Cleanup; + } + + /* + * Remember location in AML stream of the field unit opcode and operands + * -- since the buffer and index operands must be evaluated. + */ + SecondDesc = ObjDesc->Common.NextObject; + SecondDesc->Extra.AmlStart = Op->Named.Data; + SecondDesc->Extra.AmlLength = Op->Named.Length; + ObjDesc->BufferField.Node = Node; + + /* Attach constructed field descriptors to parent node */ + + Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD); + if (ACPI_FAILURE (Status)) + { + goto Cleanup; + } + + +Cleanup: + + /* Remove local reference to the object */ + + AcpiUtRemoveReference (ObjDesc); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDsGetFieldNames + * + * PARAMETERS: Info - CreateField info structure + * ` WalkState - Current method state + * Arg - First parser arg for the field name list + * + * RETURN: Status + * + * DESCRIPTION: Process all named fields in a field declaration. Names are + * entered into the namespace. + * + ******************************************************************************/ + +static ACPI_STATUS +AcpiDsGetFieldNames ( + ACPI_CREATE_FIELD_INFO *Info, + ACPI_WALK_STATE *WalkState, + ACPI_PARSE_OBJECT *Arg) +{ + ACPI_STATUS Status; + UINT64 Position; + ACPI_PARSE_OBJECT *Child; + + + ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info); + + + /* First field starts at bit zero */ + + Info->FieldBitPosition = 0; + + /* Process all elements in the field list (of parse nodes) */ + + while (Arg) + { + /* + * Four types of field elements are handled: + * 1) Name - Enters a new named field into the namespace + * 2) Offset - specifies a bit offset + * 3) AccessAs - changes the access mode/attributes + * 4) Connection - Associate a resource template with the field + */ + switch (Arg->Common.AmlOpcode) + { + case AML_INT_RESERVEDFIELD_OP: + + Position = (UINT64) Info->FieldBitPosition + + (UINT64) Arg->Common.Value.Size; + + if (Position > ACPI_UINT32_MAX) + { + ACPI_ERROR ((AE_INFO, + "Bit offset within field too large (> 0xFFFFFFFF)")); + return_ACPI_STATUS (AE_SUPPORT); + } + + Info->FieldBitPosition = (UINT32) Position; + break; + + case AML_INT_ACCESSFIELD_OP: + case AML_INT_EXTACCESSFIELD_OP: + /* + * Get new AccessType, AccessAttribute, and AccessLength fields + * -- to be used for all field units that follow, until the + * end-of-field or another AccessAs keyword is encountered. + * NOTE. These three bytes are encoded in the integer value + * of the parseop for convenience. + * + * In FieldFlags, preserve the flag bits other than the + * ACCESS_TYPE bits. + */ + + /* AccessType (ByteAcc, WordAcc, etc.) */ + + Info->FieldFlags = (UINT8) + ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | + ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07)))); + + /* AccessAttribute (AttribQuick, AttribByte, etc.) */ + + Info->Attribute = (UINT8) + ((Arg->Common.Value.Integer >> 8) & 0xFF); + + /* AccessLength (for serial/buffer protocols) */ + + Info->AccessLength = (UINT8) + ((Arg->Common.Value.Integer >> 16) & 0xFF); + break; + + case AML_INT_CONNECTION_OP: + /* + * Clear any previous connection. New connection is used for all + * fields that follow, similar to AccessAs + */ + Info->ResourceBuffer = NULL; + Info->ConnectionNode = NULL; + Info->PinNumberIndex = 0; + + /* + * A Connection() is either an actual resource descriptor (buffer) + * or a named reference to a resource template + */ + Child = Arg->Common.Value.Arg; + if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP) + { + Info->ResourceBuffer = Child->Named.Data; + Info->ResourceLength = (UINT16) Child->Named.Value.Integer; + } + else + { + /* Lookup the Connection() namepath, it should already exist */ + + Status = AcpiNsLookup (WalkState->ScopeInfo, + Child->Common.Value.Name, ACPI_TYPE_ANY, + ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, + WalkState, &Info->ConnectionNode); + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE (Child->Common.Value.Name, Status); + return_ACPI_STATUS (Status); + } + } + break; + + case AML_INT_NAMEDFIELD_OP: + + /* Lookup the name, it should already exist */ + + Status = AcpiNsLookup (WalkState->ScopeInfo, + (char *) &Arg->Named.Name, Info->FieldType, + ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, + WalkState, &Info->FieldNode); + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); + return_ACPI_STATUS (Status); + } + else + { + Arg->Common.Node = Info->FieldNode; + Info->FieldBitLength = Arg->Common.Value.Size; + + /* + * If there is no object attached to the node, this node was + * just created and we need to create the field object. + * Otherwise, this was a lookup of an existing node and we + * don't want to create the field object again. + */ + if (!AcpiNsGetAttachedObject (Info->FieldNode)) + { + Status = AcpiExPrepFieldValue (Info); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + } + } + + /* Keep track of bit position for the next field */ + + Position = (UINT64) Info->FieldBitPosition + + (UINT64) Arg->Common.Value.Size; + + if (Position > ACPI_UINT32_MAX) + { + ACPI_ERROR ((AE_INFO, + "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", + ACPI_CAST_PTR (char, &Info->FieldNode->Name))); + return_ACPI_STATUS (AE_SUPPORT); + } + + Info->FieldBitPosition += Info->FieldBitLength; + Info->PinNumberIndex++; /* Index relative to previous Connection() */ + break; + + default: + + ACPI_ERROR ((AE_INFO, + "Invalid opcode in field list: 0x%X", + Arg->Common.AmlOpcode)); + return_ACPI_STATUS (AE_AML_BAD_OPCODE); + } + + Arg = Arg->Common.Next; + } + + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDsCreateField + * + * PARAMETERS: Op - Op containing the Field definition and args + * RegionNode - Object for the containing Operation Region + * ` WalkState - Current method state + * + * RETURN: Status + * + * DESCRIPTION: Create a new field in the specified operation region + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsCreateField ( + ACPI_PARSE_OBJECT *Op, + ACPI_NAMESPACE_NODE *RegionNode, + ACPI_WALK_STATE *WalkState) +{ + ACPI_STATUS Status; + ACPI_PARSE_OBJECT *Arg; + ACPI_CREATE_FIELD_INFO Info; + + + ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op); + + + /* First arg is the name of the parent OpRegion (must already exist) */ + + Arg = Op->Common.Value.Arg; + + if (!RegionNode) + { + Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, + ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); +#ifdef ACPI_ASL_COMPILER + Status = AcpiDsCreateExternalRegion (Status, Arg, + Arg->Common.Value.Name, WalkState, &RegionNode); +#endif + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); + return_ACPI_STATUS (Status); + } + } + + memset (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO)); + + /* Second arg is the field flags */ + + Arg = Arg->Common.Next; + Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; + Info.Attribute = 0; + + /* Each remaining arg is a Named Field */ + + Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD; + Info.RegionNode = RegionNode; + + Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDsInitFieldObjects + * + * PARAMETERS: Op - Op containing the Field definition and args + * ` WalkState - Current method state + * + * RETURN: Status + * + * DESCRIPTION: For each "Field Unit" name in the argument list that is + * part of the field declaration, enter the name into the + * namespace. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsInitFieldObjects ( + ACPI_PARSE_OBJECT *Op, + ACPI_WALK_STATE *WalkState) +{ + ACPI_STATUS Status; + ACPI_PARSE_OBJECT *Arg = NULL; + ACPI_NAMESPACE_NODE *Node; + UINT8 Type = 0; + UINT32 Flags; + + + ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op); + + + /* Execute flag should always be set when this function is entered */ + + if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) + { + if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP) + { + /* BankField Op is deferred, just return OK */ + + return_ACPI_STATUS (AE_OK); + } + + return_ACPI_STATUS (AE_AML_INTERNAL); + } + + /* + * Get the FieldList argument for this opcode. This is the start of the + * list of field elements. + */ + switch (WalkState->Opcode) + { + case AML_FIELD_OP: + + Arg = AcpiPsGetArg (Op, 2); + Type = ACPI_TYPE_LOCAL_REGION_FIELD; + break; + + case AML_BANK_FIELD_OP: + + Arg = AcpiPsGetArg (Op, 4); + Type = ACPI_TYPE_LOCAL_BANK_FIELD; + break; + + case AML_INDEX_FIELD_OP: + + Arg = AcpiPsGetArg (Op, 3); + Type = ACPI_TYPE_LOCAL_INDEX_FIELD; + break; + + default: + + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* Creating new namespace node(s), should not already exist */ + + Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | + ACPI_NS_ERROR_IF_FOUND; + + /* + * Mark node(s) temporary if we are executing a normal control + * method. (Don't mark if this is a module-level code method) + */ + if (WalkState->MethodNode && + !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) + { + Flags |= ACPI_NS_TEMPORARY; + } + + /* + * Walk the list of entries in the FieldList + * Note: FieldList can be of zero length. In this case, Arg will be NULL. + */ + while (Arg) + { + /* + * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested + * in the field names in order to enter them into the namespace. + */ + if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP) + { + Status = AcpiNsLookup (WalkState->ScopeInfo, + (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1, + Flags, WalkState, &Node); + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); + if (Status != AE_ALREADY_EXISTS) + { + return_ACPI_STATUS (Status); + } + + /* Name already exists, just ignore this error */ + + Status = AE_OK; + } + + Arg->Common.Node = Node; + } + + /* Get the next field element in the list */ + + Arg = Arg->Common.Next; + } + + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDsCreateBankField + * + * PARAMETERS: Op - Op containing the Field definition and args + * RegionNode - Object for the containing Operation Region + * WalkState - Current method state + * + * RETURN: Status + * + * DESCRIPTION: Create a new bank field in the specified operation region + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsCreateBankField ( + ACPI_PARSE_OBJECT *Op, + ACPI_NAMESPACE_NODE *RegionNode, + ACPI_WALK_STATE *WalkState) +{ + ACPI_STATUS Status; + ACPI_PARSE_OBJECT *Arg; + ACPI_CREATE_FIELD_INFO Info; + + + ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op); + + + /* First arg is the name of the parent OpRegion (must already exist) */ + + Arg = Op->Common.Value.Arg; + if (!RegionNode) + { + Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, + ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); +#ifdef ACPI_ASL_COMPILER + Status = AcpiDsCreateExternalRegion (Status, Arg, + Arg->Common.Value.Name, WalkState, &RegionNode); +#endif + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); + return_ACPI_STATUS (Status); + } + } + + /* Second arg is the Bank Register (Field) (must already exist) */ + + Arg = Arg->Common.Next; + Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, + ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); + return_ACPI_STATUS (Status); + } + + /* + * Third arg is the BankValue + * This arg is a TermArg, not a constant + * It will be evaluated later, by AcpiDsEvalBankFieldOperands + */ + Arg = Arg->Common.Next; + + /* Fourth arg is the field flags */ + + Arg = Arg->Common.Next; + Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; + + /* Each remaining arg is a Named Field */ + + Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD; + Info.RegionNode = RegionNode; + + /* + * Use Info.DataRegisterNode to store BankField Op + * It's safe because DataRegisterNode will never be used when create + * bank field \we store AmlStart and AmlLength in the BankField Op for + * late evaluation. Used in AcpiExPrepFieldValue(Info) + * + * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like + * "void *ParentOp"? + */ + Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op; + + Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiDsCreateIndexField + * + * PARAMETERS: Op - Op containing the Field definition and args + * RegionNode - Object for the containing Operation Region + * ` WalkState - Current method state + * + * RETURN: Status + * + * DESCRIPTION: Create a new index field in the specified operation region + * + ******************************************************************************/ + +ACPI_STATUS +AcpiDsCreateIndexField ( + ACPI_PARSE_OBJECT *Op, + ACPI_NAMESPACE_NODE *RegionNode, + ACPI_WALK_STATE *WalkState) +{ + ACPI_STATUS Status; + ACPI_PARSE_OBJECT *Arg; + ACPI_CREATE_FIELD_INFO Info; + + + ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op); + + + /* First arg is the name of the Index register (must already exist) */ + + Arg = Op->Common.Value.Arg; + Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, + ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); + return_ACPI_STATUS (Status); + } + + /* Second arg is the data register (must already exist) */ + + Arg = Arg->Common.Next; + Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, + ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode); + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); + return_ACPI_STATUS (Status); + } + + /* Next arg is the field flags */ + + Arg = Arg->Common.Next; + Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; + + /* Each remaining arg is a Named Field */ + + Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD; + Info.RegionNode = RegionNode; + + Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); + return_ACPI_STATUS (Status); +} |