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295 lines
7.5 KiB
C
295 lines
7.5 KiB
C
/******************************************************************************
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*
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* Module Name: psutils - Parser miscellaneous utilities (Parser only)
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2019, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acparser.h"
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#include "amlcode.h"
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#include "acconvert.h"
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME ("psutils")
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsCreateScopeOp
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*
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* PARAMETERS: None
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*
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* RETURN: A new Scope object, null on failure
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*
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* DESCRIPTION: Create a Scope and associated namepath op with the root name
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*
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******************************************************************************/
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ACPI_PARSE_OBJECT *
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AcpiPsCreateScopeOp (
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UINT8 *Aml)
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{
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ACPI_PARSE_OBJECT *ScopeOp;
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ScopeOp = AcpiPsAllocOp (AML_SCOPE_OP, Aml);
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if (!ScopeOp)
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{
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return (NULL);
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}
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ScopeOp->Named.Name = ACPI_ROOT_NAME;
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return (ScopeOp);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsInitOp
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*
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* PARAMETERS: Op - A newly allocated Op object
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* Opcode - Opcode to store in the Op
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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize a parse (Op) object
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*
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******************************************************************************/
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void
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AcpiPsInitOp (
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ACPI_PARSE_OBJECT *Op,
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UINT16 Opcode)
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{
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ACPI_FUNCTION_ENTRY ();
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Op->Common.DescriptorType = ACPI_DESC_TYPE_PARSER;
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Op->Common.AmlOpcode = Opcode;
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ACPI_DISASM_ONLY_MEMBERS (AcpiUtSafeStrncpy (Op->Common.AmlOpName,
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(AcpiPsGetOpcodeInfo (Opcode))->Name,
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sizeof (Op->Common.AmlOpName)));
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsAllocOp
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*
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* PARAMETERS: Opcode - Opcode that will be stored in the new Op
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* Aml - Address of the opcode
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*
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* RETURN: Pointer to the new Op, null on failure
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*
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* DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
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* opcode. A cache of opcodes is available for the pure
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* GENERIC_OP, since this is by far the most commonly used.
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*
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******************************************************************************/
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ACPI_PARSE_OBJECT*
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AcpiPsAllocOp (
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UINT16 Opcode,
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UINT8 *Aml)
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{
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ACPI_PARSE_OBJECT *Op;
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const ACPI_OPCODE_INFO *OpInfo;
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UINT8 Flags = ACPI_PARSEOP_GENERIC;
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ACPI_FUNCTION_ENTRY ();
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OpInfo = AcpiPsGetOpcodeInfo (Opcode);
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/* Determine type of ParseOp required */
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if (OpInfo->Flags & AML_DEFER)
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{
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Flags = ACPI_PARSEOP_DEFERRED;
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}
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else if (OpInfo->Flags & AML_NAMED)
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{
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Flags = ACPI_PARSEOP_NAMED_OBJECT;
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}
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else if (Opcode == AML_INT_BYTELIST_OP)
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{
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Flags = ACPI_PARSEOP_BYTELIST;
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}
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/* Allocate the minimum required size object */
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if (Flags == ACPI_PARSEOP_GENERIC)
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{
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/* The generic op (default) is by far the most common (16 to 1) */
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Op = AcpiOsAcquireObject (AcpiGbl_PsNodeCache);
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}
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else
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{
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/* Extended parseop */
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Op = AcpiOsAcquireObject (AcpiGbl_PsNodeExtCache);
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}
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/* Initialize the Op */
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if (Op)
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{
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AcpiPsInitOp (Op, Opcode);
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Op->Common.Aml = Aml;
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Op->Common.Flags = Flags;
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ASL_CV_CLEAR_OP_COMMENTS(Op);
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if (Opcode == AML_SCOPE_OP)
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{
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AcpiGbl_CurrentScope = Op;
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}
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if (AcpiGbl_CaptureComments)
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{
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ASL_CV_TRANSFER_COMMENTS (Op);
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}
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}
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return (Op);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiPsFreeOp
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*
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* PARAMETERS: Op - Op to be freed
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*
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* RETURN: None.
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*
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* DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
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* or actually free it.
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*
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******************************************************************************/
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void
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AcpiPsFreeOp (
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ACPI_PARSE_OBJECT *Op)
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{
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ACPI_FUNCTION_NAME (PsFreeOp);
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ASL_CV_CLEAR_OP_COMMENTS(Op);
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if (Op->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
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"Free retval op: %p\n", Op));
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}
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if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
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{
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(void) AcpiOsReleaseObject (AcpiGbl_PsNodeCache, Op);
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}
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else
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{
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(void) AcpiOsReleaseObject (AcpiGbl_PsNodeExtCache, Op);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: Utility functions
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*
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* DESCRIPTION: Low level character and object functions
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*
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******************************************************************************/
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/*
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* Is "c" a namestring lead character?
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*/
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BOOLEAN
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AcpiPsIsLeadingChar (
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UINT32 c)
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{
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return ((BOOLEAN) (c == '_' || (c >= 'A' && c <= 'Z')));
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}
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/*
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* Get op's name (4-byte name segment) or 0 if unnamed
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*/
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UINT32
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AcpiPsGetName (
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ACPI_PARSE_OBJECT *Op)
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{
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/* The "generic" object has no name associated with it */
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if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
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{
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return (0);
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}
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/* Only the "Extended" parse objects have a name */
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return (Op->Named.Name);
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}
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/*
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* Set op's name
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*/
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void
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AcpiPsSetName (
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ACPI_PARSE_OBJECT *Op,
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UINT32 name)
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{
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/* The "generic" object has no name associated with it */
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if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
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{
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return;
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}
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Op->Named.Name = name;
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}
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