1 /******************************************************************************
3 * Module Name: psutils - Parser miscellaneous utilities (Parser only)
5 *****************************************************************************/
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45 #include <contrib/dev/acpica/include/acpi.h>
46 #include <contrib/dev/acpica/include/accommon.h>
47 #include <contrib/dev/acpica/include/acparser.h>
48 #include <contrib/dev/acpica/include/amlcode.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);
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 (ACPI_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
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 ******************************************************************************/
132 ACPI_PARSE_OBJECT *Op;
133 const ACPI_OPCODE_INFO *OpInfo;
134 UINT8 Flags = ACPI_PARSEOP_GENERIC;
137 ACPI_FUNCTION_ENTRY ();
140 OpInfo = AcpiPsGetOpcodeInfo (Opcode);
142 /* Determine type of ParseOp required */
144 if (OpInfo->Flags & AML_DEFER)
146 Flags = ACPI_PARSEOP_DEFERRED;
148 else if (OpInfo->Flags & AML_NAMED)
150 Flags = ACPI_PARSEOP_NAMED;
152 else if (Opcode == AML_INT_BYTELIST_OP)
154 Flags = ACPI_PARSEOP_BYTELIST;
157 /* Allocate the minimum required size object */
159 if (Flags == ACPI_PARSEOP_GENERIC)
161 /* The generic op (default) is by far the most common (16 to 1) */
163 Op = AcpiOsAcquireObject (AcpiGbl_PsNodeCache);
167 /* Extended parseop */
169 Op = AcpiOsAcquireObject (AcpiGbl_PsNodeExtCache);
172 /* Initialize the Op */
176 AcpiPsInitOp (Op, Opcode);
177 Op->Common.Flags = Flags;
184 /*******************************************************************************
186 * FUNCTION: AcpiPsFreeOp
188 * PARAMETERS: Op - Op to be freed
192 * DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
193 * or actually free it.
195 ******************************************************************************/
199 ACPI_PARSE_OBJECT *Op)
201 ACPI_FUNCTION_NAME (PsFreeOp);
204 if (Op->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP)
206 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Free retval op: %p\n", Op));
209 if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
211 (void) AcpiOsReleaseObject (AcpiGbl_PsNodeCache, Op);
215 (void) AcpiOsReleaseObject (AcpiGbl_PsNodeExtCache, Op);
220 /*******************************************************************************
222 * FUNCTION: Utility functions
224 * DESCRIPTION: Low level character and object functions
226 ******************************************************************************/
230 * Is "c" a namestring lead character?
233 AcpiPsIsLeadingChar (
236 return ((BOOLEAN) (c == '_' || (c >= 'A' && c <= 'Z')));
241 * Is "c" a namestring prefix character?
247 return ((BOOLEAN) (c == '\\' || c == '^'));
252 * Get op's name (4-byte name segment) or 0 if unnamed
256 ACPI_PARSE_OBJECT *Op)
259 /* The "generic" object has no name associated with it */
261 if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
266 /* Only the "Extended" parse objects have a name */
268 return (Op->Named.Name);
277 ACPI_PARSE_OBJECT *Op,
281 /* The "generic" object has no name associated with it */
283 if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
288 Op->Named.Name = name;