b7bebab58aac9af39de5ab25cdee1a5f3ac0867c
1 /******************************************************************************
3 * Module Name: psutils - Parser miscellaneous utilities (Parser only)
5 *****************************************************************************/
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49 #define _COMPONENT ACPI_PARSER
50 ACPI_MODULE_NAME ("psutils")
53 /*******************************************************************************
55 * FUNCTION: AcpiPsCreateScopeOp
59 * RETURN: A new Scope object, null on failure
61 * DESCRIPTION: Create a Scope and associated namepath op with the root name
63 ******************************************************************************/
69 ACPI_PARSE_OBJECT
*ScopeOp
;
72 ScopeOp
= AcpiPsAllocOp (AML_SCOPE_OP
, Aml
);
78 ScopeOp
->Named
.Name
= ACPI_ROOT_NAME
;
83 /*******************************************************************************
85 * FUNCTION: AcpiPsInitOp
87 * PARAMETERS: Op - A newly allocated Op object
88 * Opcode - Opcode to store in the Op
92 * DESCRIPTION: Initialize a parse (Op) object
94 ******************************************************************************/
98 ACPI_PARSE_OBJECT
*Op
,
101 ACPI_FUNCTION_ENTRY ();
104 Op
->Common
.DescriptorType
= ACPI_DESC_TYPE_PARSER
;
105 Op
->Common
.AmlOpcode
= Opcode
;
107 ACPI_DISASM_ONLY_MEMBERS (strncpy (Op
->Common
.AmlOpName
,
108 (AcpiPsGetOpcodeInfo (Opcode
))->Name
,
109 sizeof (Op
->Common
.AmlOpName
)));
113 /*******************************************************************************
115 * FUNCTION: AcpiPsAllocOp
117 * PARAMETERS: Opcode - Opcode that will be stored in the new Op
118 * Aml - Address of the opcode
120 * RETURN: Pointer to the new Op, null on failure
122 * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
123 * opcode. A cache of opcodes is available for the pure
124 * GENERIC_OP, since this is by far the most commonly used.
126 ******************************************************************************/
133 ACPI_PARSE_OBJECT
*Op
;
134 const ACPI_OPCODE_INFO
*OpInfo
;
135 UINT8 Flags
= ACPI_PARSEOP_GENERIC
;
138 ACPI_FUNCTION_ENTRY ();
141 OpInfo
= AcpiPsGetOpcodeInfo (Opcode
);
143 /* Determine type of ParseOp required */
145 if (OpInfo
->Flags
& AML_DEFER
)
147 Flags
= ACPI_PARSEOP_DEFERRED
;
149 else if (OpInfo
->Flags
& AML_NAMED
)
151 Flags
= ACPI_PARSEOP_NAMED
;
153 else if (Opcode
== AML_INT_BYTELIST_OP
)
155 Flags
= ACPI_PARSEOP_BYTELIST
;
158 /* Allocate the minimum required size object */
160 if (Flags
== ACPI_PARSEOP_GENERIC
)
162 /* The generic op (default) is by far the most common (16 to 1) */
164 Op
= AcpiOsAcquireObject (AcpiGbl_PsNodeCache
);
168 /* Extended parseop */
170 Op
= AcpiOsAcquireObject (AcpiGbl_PsNodeExtCache
);
173 /* Initialize the Op */
177 AcpiPsInitOp (Op
, Opcode
);
178 Op
->Common
.Aml
= Aml
;
179 Op
->Common
.Flags
= Flags
;
186 /*******************************************************************************
188 * FUNCTION: AcpiPsFreeOp
190 * PARAMETERS: Op - Op to be freed
194 * DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
195 * or actually free it.
197 ******************************************************************************/
201 ACPI_PARSE_OBJECT
*Op
)
203 ACPI_FUNCTION_NAME (PsFreeOp
);
206 if (Op
->Common
.AmlOpcode
== AML_INT_RETURN_VALUE_OP
)
208 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS
,
209 "Free retval op: %p\n", Op
));
212 if (Op
->Common
.Flags
& ACPI_PARSEOP_GENERIC
)
214 (void) AcpiOsReleaseObject (AcpiGbl_PsNodeCache
, Op
);
218 (void) AcpiOsReleaseObject (AcpiGbl_PsNodeExtCache
, Op
);
223 /*******************************************************************************
225 * FUNCTION: Utility functions
227 * DESCRIPTION: Low level character and object functions
229 ******************************************************************************/
233 * Is "c" a namestring lead character?
236 AcpiPsIsLeadingChar (
239 return ((BOOLEAN
) (c
== '_' || (c
>= 'A' && c
<= 'Z')));
244 * Get op's name (4-byte name segment) or 0 if unnamed
248 ACPI_PARSE_OBJECT
*Op
)
251 /* The "generic" object has no name associated with it */
253 if (Op
->Common
.Flags
& ACPI_PARSEOP_GENERIC
)
258 /* Only the "Extended" parse objects have a name */
260 return (Op
->Named
.Name
);
269 ACPI_PARSE_OBJECT
*Op
,
273 /* The "generic" object has no name associated with it */
275 if (Op
->Common
.Flags
& ACPI_PARSEOP_GENERIC
)
280 Op
->Named
.Name
= name
;