1 /******************************************************************************
3 * Module Name: psutils - Parser miscellaneous utilities (Parser only)
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2017, Intel Corp.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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48 #include "acconvert.h"
50 #define _COMPONENT ACPI_PARSER
51 ACPI_MODULE_NAME ("psutils")
54 /*******************************************************************************
56 * FUNCTION: AcpiPsCreateScopeOp
60 * RETURN: A new Scope object, null on failure
62 * DESCRIPTION: Create a Scope and associated namepath op with the root name
64 ******************************************************************************/
70 ACPI_PARSE_OBJECT *ScopeOp;
73 ScopeOp = AcpiPsAllocOp (AML_SCOPE_OP, Aml);
79 ScopeOp->Named.Name = ACPI_ROOT_NAME;
84 /*******************************************************************************
86 * FUNCTION: AcpiPsInitOp
88 * PARAMETERS: Op - A newly allocated Op object
89 * Opcode - Opcode to store in the Op
93 * DESCRIPTION: Initialize a parse (Op) object
95 ******************************************************************************/
99 ACPI_PARSE_OBJECT *Op,
102 ACPI_FUNCTION_ENTRY ();
105 Op->Common.DescriptorType = ACPI_DESC_TYPE_PARSER;
106 Op->Common.AmlOpcode = Opcode;
108 ACPI_DISASM_ONLY_MEMBERS (strncpy (Op->Common.AmlOpName,
109 (AcpiPsGetOpcodeInfo (Opcode))->Name,
110 sizeof (Op->Common.AmlOpName)));
114 /*******************************************************************************
116 * FUNCTION: AcpiPsAllocOp
118 * PARAMETERS: Opcode - Opcode that will be stored in the new Op
119 * Aml - Address of the opcode
121 * RETURN: Pointer to the new Op, null on failure
123 * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
124 * opcode. A cache of opcodes is available for the pure
125 * GENERIC_OP, since this is by far the most commonly used.
127 ******************************************************************************/
134 ACPI_PARSE_OBJECT *Op;
135 const ACPI_OPCODE_INFO *OpInfo;
136 UINT8 Flags = ACPI_PARSEOP_GENERIC;
139 ACPI_FUNCTION_ENTRY ();
142 OpInfo = AcpiPsGetOpcodeInfo (Opcode);
144 /* Determine type of ParseOp required */
146 if (OpInfo->Flags & AML_DEFER)
148 Flags = ACPI_PARSEOP_DEFERRED;
150 else if (OpInfo->Flags & AML_NAMED)
152 Flags = ACPI_PARSEOP_NAMED_OBJECT;
154 else if (Opcode == AML_INT_BYTELIST_OP)
156 Flags = ACPI_PARSEOP_BYTELIST;
159 /* Allocate the minimum required size object */
161 if (Flags == ACPI_PARSEOP_GENERIC)
163 /* The generic op (default) is by far the most common (16 to 1) */
165 Op = AcpiOsAcquireObject (AcpiGbl_PsNodeCache);
169 /* Extended parseop */
171 Op = AcpiOsAcquireObject (AcpiGbl_PsNodeExtCache);
174 /* Initialize the Op */
178 AcpiPsInitOp (Op, Opcode);
179 Op->Common.Aml = Aml;
180 Op->Common.Flags = Flags;
181 ASL_CV_CLEAR_OP_COMMENTS(Op);
183 if (Opcode == AML_SCOPE_OP)
185 AcpiGbl_CurrentScope = Op;
189 if (Gbl_CaptureComments)
191 ASL_CV_TRANSFER_COMMENTS (Op);
198 /*******************************************************************************
200 * FUNCTION: AcpiPsFreeOp
202 * PARAMETERS: Op - Op to be freed
206 * DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
207 * or actually free it.
209 ******************************************************************************/
213 ACPI_PARSE_OBJECT *Op)
215 ACPI_FUNCTION_NAME (PsFreeOp);
218 ASL_CV_CLEAR_OP_COMMENTS(Op);
219 if (Op->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP)
221 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
222 "Free retval op: %p\n", Op));
225 if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
227 (void) AcpiOsReleaseObject (AcpiGbl_PsNodeCache, Op);
231 (void) AcpiOsReleaseObject (AcpiGbl_PsNodeExtCache, Op);
236 /*******************************************************************************
238 * FUNCTION: Utility functions
240 * DESCRIPTION: Low level character and object functions
242 ******************************************************************************/
246 * Is "c" a namestring lead character?
249 AcpiPsIsLeadingChar (
252 return ((BOOLEAN) (c == '_' || (c >= 'A' && c <= 'Z')));
257 * Get op's name (4-byte name segment) or 0 if unnamed
261 ACPI_PARSE_OBJECT *Op)
264 /* The "generic" object has no name associated with it */
266 if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
271 /* Only the "Extended" parse objects have a name */
273 return (Op->Named.Name);
282 ACPI_PARSE_OBJECT *Op,
286 /* The "generic" object has no name associated with it */
288 if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
293 Op->Named.Name = name;