1bc36eafdSMike Gerdts /******************************************************************************
2bc36eafdSMike Gerdts *
3bc36eafdSMike Gerdts * Module Name: asllookup- Namespace lookup functions
4bc36eafdSMike Gerdts *
5bc36eafdSMike Gerdts *****************************************************************************/
6bc36eafdSMike Gerdts
7*35786f68SRobert Mustacchi /******************************************************************************
8*35786f68SRobert Mustacchi *
9*35786f68SRobert Mustacchi * 1. Copyright Notice
10*35786f68SRobert Mustacchi *
11*35786f68SRobert Mustacchi * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12bc36eafdSMike Gerdts * All rights reserved.
13bc36eafdSMike Gerdts *
14*35786f68SRobert Mustacchi * 2. License
15*35786f68SRobert Mustacchi *
16*35786f68SRobert Mustacchi * 2.1. This is your license from Intel Corp. under its intellectual property
17*35786f68SRobert Mustacchi * rights. You may have additional license terms from the party that provided
18*35786f68SRobert Mustacchi * you this software, covering your right to use that party's intellectual
19*35786f68SRobert Mustacchi * property rights.
20*35786f68SRobert Mustacchi *
21*35786f68SRobert Mustacchi * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22*35786f68SRobert Mustacchi * copy of the source code appearing in this file ("Covered Code") an
23*35786f68SRobert Mustacchi * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24*35786f68SRobert Mustacchi * base code distributed originally by Intel ("Original Intel Code") to copy,
25*35786f68SRobert Mustacchi * make derivatives, distribute, use and display any portion of the Covered
26*35786f68SRobert Mustacchi * Code in any form, with the right to sublicense such rights; and
27*35786f68SRobert Mustacchi *
28*35786f68SRobert Mustacchi * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29*35786f68SRobert Mustacchi * license (with the right to sublicense), under only those claims of Intel
30*35786f68SRobert Mustacchi * patents that are infringed by the Original Intel Code, to make, use, sell,
31*35786f68SRobert Mustacchi * offer to sell, and import the Covered Code and derivative works thereof
32*35786f68SRobert Mustacchi * solely to the minimum extent necessary to exercise the above copyright
33*35786f68SRobert Mustacchi * license, and in no event shall the patent license extend to any additions
34*35786f68SRobert Mustacchi * to or modifications of the Original Intel Code. No other license or right
35*35786f68SRobert Mustacchi * is granted directly or by implication, estoppel or otherwise;
36*35786f68SRobert Mustacchi *
37*35786f68SRobert Mustacchi * The above copyright and patent license is granted only if the following
38*35786f68SRobert Mustacchi * conditions are met:
39*35786f68SRobert Mustacchi *
40*35786f68SRobert Mustacchi * 3. Conditions
41*35786f68SRobert Mustacchi *
42*35786f68SRobert Mustacchi * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43*35786f68SRobert Mustacchi * Redistribution of source code of any substantial portion of the Covered
44*35786f68SRobert Mustacchi * Code or modification with rights to further distribute source must include
45*35786f68SRobert Mustacchi * the above Copyright Notice, the above License, this list of Conditions,
46*35786f68SRobert Mustacchi * and the following Disclaimer and Export Compliance provision. In addition,
47*35786f68SRobert Mustacchi * Licensee must cause all Covered Code to which Licensee contributes to
48*35786f68SRobert Mustacchi * contain a file documenting the changes Licensee made to create that Covered
49*35786f68SRobert Mustacchi * Code and the date of any change. Licensee must include in that file the
50*35786f68SRobert Mustacchi * documentation of any changes made by any predecessor Licensee. Licensee
51*35786f68SRobert Mustacchi * must include a prominent statement that the modification is derived,
52*35786f68SRobert Mustacchi * directly or indirectly, from Original Intel Code.
53*35786f68SRobert Mustacchi *
54*35786f68SRobert Mustacchi * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55*35786f68SRobert Mustacchi * Redistribution of source code of any substantial portion of the Covered
56*35786f68SRobert Mustacchi * Code or modification without rights to further distribute source must
57*35786f68SRobert Mustacchi * include the following Disclaimer and Export Compliance provision in the
58*35786f68SRobert Mustacchi * documentation and/or other materials provided with distribution. In
59*35786f68SRobert Mustacchi * addition, Licensee may not authorize further sublicense of source of any
60*35786f68SRobert Mustacchi * portion of the Covered Code, and must include terms to the effect that the
61*35786f68SRobert Mustacchi * license from Licensee to its licensee is limited to the intellectual
62*35786f68SRobert Mustacchi * property embodied in the software Licensee provides to its licensee, and
63*35786f68SRobert Mustacchi * not to intellectual property embodied in modifications its licensee may
64*35786f68SRobert Mustacchi * make.
65*35786f68SRobert Mustacchi *
66*35786f68SRobert Mustacchi * 3.3. Redistribution of Executable. Redistribution in executable form of any
67*35786f68SRobert Mustacchi * substantial portion of the Covered Code or modification must reproduce the
68*35786f68SRobert Mustacchi * above Copyright Notice, and the following Disclaimer and Export Compliance
69*35786f68SRobert Mustacchi * provision in the documentation and/or other materials provided with the
70*35786f68SRobert Mustacchi * distribution.
71*35786f68SRobert Mustacchi *
72*35786f68SRobert Mustacchi * 3.4. Intel retains all right, title, and interest in and to the Original
73*35786f68SRobert Mustacchi * Intel Code.
74*35786f68SRobert Mustacchi *
75*35786f68SRobert Mustacchi * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76*35786f68SRobert Mustacchi * Intel shall be used in advertising or otherwise to promote the sale, use or
77*35786f68SRobert Mustacchi * other dealings in products derived from or relating to the Covered Code
78*35786f68SRobert Mustacchi * without prior written authorization from Intel.
79*35786f68SRobert Mustacchi *
80*35786f68SRobert Mustacchi * 4. Disclaimer and Export Compliance
81*35786f68SRobert Mustacchi *
82*35786f68SRobert Mustacchi * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83*35786f68SRobert Mustacchi * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84*35786f68SRobert Mustacchi * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85*35786f68SRobert Mustacchi * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86*35786f68SRobert Mustacchi * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87*35786f68SRobert Mustacchi * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88*35786f68SRobert Mustacchi * PARTICULAR PURPOSE.
89*35786f68SRobert Mustacchi *
90*35786f68SRobert Mustacchi * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91*35786f68SRobert Mustacchi * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92*35786f68SRobert Mustacchi * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93*35786f68SRobert Mustacchi * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94*35786f68SRobert Mustacchi * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95*35786f68SRobert Mustacchi * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96*35786f68SRobert Mustacchi * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97*35786f68SRobert Mustacchi * LIMITED REMEDY.
98*35786f68SRobert Mustacchi *
99*35786f68SRobert Mustacchi * 4.3. Licensee shall not export, either directly or indirectly, any of this
100*35786f68SRobert Mustacchi * software or system incorporating such software without first obtaining any
101*35786f68SRobert Mustacchi * required license or other approval from the U. S. Department of Commerce or
102*35786f68SRobert Mustacchi * any other agency or department of the United States Government. In the
103*35786f68SRobert Mustacchi * event Licensee exports any such software from the United States or
104*35786f68SRobert Mustacchi * re-exports any such software from a foreign destination, Licensee shall
105*35786f68SRobert Mustacchi * ensure that the distribution and export/re-export of the software is in
106*35786f68SRobert Mustacchi * compliance with all laws, regulations, orders, or other restrictions of the
107*35786f68SRobert Mustacchi * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108*35786f68SRobert Mustacchi * any of its subsidiaries will export/re-export any technical data, process,
109*35786f68SRobert Mustacchi * software, or service, directly or indirectly, to any country for which the
110*35786f68SRobert Mustacchi * United States government or any agency thereof requires an export license,
111*35786f68SRobert Mustacchi * other governmental approval, or letter of assurance, without first obtaining
112*35786f68SRobert Mustacchi * such license, approval or letter.
113*35786f68SRobert Mustacchi *
114*35786f68SRobert Mustacchi *****************************************************************************
115*35786f68SRobert Mustacchi *
116*35786f68SRobert Mustacchi * Alternatively, you may choose to be licensed under the terms of the
117*35786f68SRobert Mustacchi * following license:
118*35786f68SRobert Mustacchi *
119bc36eafdSMike Gerdts * Redistribution and use in source and binary forms, with or without
120bc36eafdSMike Gerdts * modification, are permitted provided that the following conditions
121bc36eafdSMike Gerdts * are met:
122bc36eafdSMike Gerdts * 1. Redistributions of source code must retain the above copyright
123bc36eafdSMike Gerdts * notice, this list of conditions, and the following disclaimer,
124bc36eafdSMike Gerdts * without modification.
125bc36eafdSMike Gerdts * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126bc36eafdSMike Gerdts * substantially similar to the "NO WARRANTY" disclaimer below
127bc36eafdSMike Gerdts * ("Disclaimer") and any redistribution must be conditioned upon
128bc36eafdSMike Gerdts * including a substantially similar Disclaimer requirement for further
129bc36eafdSMike Gerdts * binary redistribution.
130bc36eafdSMike Gerdts * 3. Neither the names of the above-listed copyright holders nor the names
131bc36eafdSMike Gerdts * of any contributors may be used to endorse or promote products derived
132bc36eafdSMike Gerdts * from this software without specific prior written permission.
133bc36eafdSMike Gerdts *
134bc36eafdSMike Gerdts * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135bc36eafdSMike Gerdts * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136*35786f68SRobert Mustacchi * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137bc36eafdSMike Gerdts * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138*35786f68SRobert Mustacchi * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139*35786f68SRobert Mustacchi * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140*35786f68SRobert Mustacchi * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141*35786f68SRobert Mustacchi * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142*35786f68SRobert Mustacchi * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143*35786f68SRobert Mustacchi * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144*35786f68SRobert Mustacchi * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145*35786f68SRobert Mustacchi *
146*35786f68SRobert Mustacchi * Alternatively, you may choose to be licensed under the terms of the
147*35786f68SRobert Mustacchi * GNU General Public License ("GPL") version 2 as published by the Free
148*35786f68SRobert Mustacchi * Software Foundation.
149*35786f68SRobert Mustacchi *
150*35786f68SRobert Mustacchi *****************************************************************************/
151bc36eafdSMike Gerdts
152bc36eafdSMike Gerdts #include "aslcompiler.h"
153bc36eafdSMike Gerdts #include "aslcompiler.y.h"
154bc36eafdSMike Gerdts #include "acparser.h"
155bc36eafdSMike Gerdts #include "amlcode.h"
156bc36eafdSMike Gerdts #include "acnamesp.h"
157bc36eafdSMike Gerdts #include "acdispat.h"
158bc36eafdSMike Gerdts
159bc36eafdSMike Gerdts
160bc36eafdSMike Gerdts #define _COMPONENT ACPI_COMPILER
161bc36eafdSMike Gerdts ACPI_MODULE_NAME ("asllookup")
162bc36eafdSMike Gerdts
163bc36eafdSMike Gerdts /* Local prototypes */
164bc36eafdSMike Gerdts
165bc36eafdSMike Gerdts static ACPI_STATUS
166bc36eafdSMike Gerdts LkIsObjectUsed (
167bc36eafdSMike Gerdts ACPI_HANDLE ObjHandle,
168bc36eafdSMike Gerdts UINT32 Level,
169bc36eafdSMike Gerdts void *Context,
170bc36eafdSMike Gerdts void **ReturnValue);
171bc36eafdSMike Gerdts
172bc36eafdSMike Gerdts static ACPI_PARSE_OBJECT *
173bc36eafdSMike Gerdts LkGetNameOp (
174bc36eafdSMike Gerdts ACPI_PARSE_OBJECT *Op);
175bc36eafdSMike Gerdts
176bc36eafdSMike Gerdts
177bc36eafdSMike Gerdts /*******************************************************************************
178bc36eafdSMike Gerdts *
179bc36eafdSMike Gerdts * FUNCTION: LkFindUnreferencedObjects
180bc36eafdSMike Gerdts *
181bc36eafdSMike Gerdts * PARAMETERS: None
182bc36eafdSMike Gerdts *
183bc36eafdSMike Gerdts * RETURN: None
184bc36eafdSMike Gerdts *
185bc36eafdSMike Gerdts * DESCRIPTION: Namespace walk to find objects that are not referenced in any
186bc36eafdSMike Gerdts * way. Must be called after the namespace has been cross
187bc36eafdSMike Gerdts * referenced.
188bc36eafdSMike Gerdts *
189bc36eafdSMike Gerdts ******************************************************************************/
190bc36eafdSMike Gerdts
191bc36eafdSMike Gerdts void
LkFindUnreferencedObjects(void)192bc36eafdSMike Gerdts LkFindUnreferencedObjects (
193bc36eafdSMike Gerdts void)
194bc36eafdSMike Gerdts {
195bc36eafdSMike Gerdts
196bc36eafdSMike Gerdts /* Walk entire namespace from the supplied root */
197bc36eafdSMike Gerdts
198bc36eafdSMike Gerdts (void) AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
199bc36eafdSMike Gerdts ACPI_UINT32_MAX, FALSE, LkIsObjectUsed, NULL,
200bc36eafdSMike Gerdts NULL, NULL);
201bc36eafdSMike Gerdts }
202bc36eafdSMike Gerdts
203bc36eafdSMike Gerdts
204bc36eafdSMike Gerdts /*******************************************************************************
205bc36eafdSMike Gerdts *
206bc36eafdSMike Gerdts * FUNCTION: LkIsObjectUsed
207bc36eafdSMike Gerdts *
208bc36eafdSMike Gerdts * PARAMETERS: ACPI_WALK_CALLBACK
209bc36eafdSMike Gerdts *
210bc36eafdSMike Gerdts * RETURN: Status
211bc36eafdSMike Gerdts *
212bc36eafdSMike Gerdts * DESCRIPTION: Check for an unreferenced namespace object and emit a warning.
213bc36eafdSMike Gerdts * We have to be careful, because some types and names are
214bc36eafdSMike Gerdts * typically or always unreferenced, we don't want to issue
215bc36eafdSMike Gerdts * excessive warnings. Note: Names that are declared within a
216bc36eafdSMike Gerdts * control method are temporary, so we always issue a remark
217bc36eafdSMike Gerdts * if they are not referenced.
218bc36eafdSMike Gerdts *
219bc36eafdSMike Gerdts ******************************************************************************/
220bc36eafdSMike Gerdts
221bc36eafdSMike Gerdts static ACPI_STATUS
LkIsObjectUsed(ACPI_HANDLE ObjHandle,UINT32 Level,void * Context,void ** ReturnValue)222bc36eafdSMike Gerdts LkIsObjectUsed (
223bc36eafdSMike Gerdts ACPI_HANDLE ObjHandle,
224bc36eafdSMike Gerdts UINT32 Level,
225bc36eafdSMike Gerdts void *Context,
226bc36eafdSMike Gerdts void **ReturnValue)
227bc36eafdSMike Gerdts {
228bc36eafdSMike Gerdts ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
229bc36eafdSMike Gerdts ACPI_NAMESPACE_NODE *Next;
230bc36eafdSMike Gerdts ASL_METHOD_LOCAL *MethodLocals;
231bc36eafdSMike Gerdts ASL_METHOD_LOCAL *MethodArgs;
232bc36eafdSMike Gerdts UINT32 i;
233bc36eafdSMike Gerdts
234bc36eafdSMike Gerdts
235bc36eafdSMike Gerdts if (Node->Type == ACPI_TYPE_METHOD)
236bc36eafdSMike Gerdts {
237bc36eafdSMike Gerdts if (!Node->Op || !Node->MethodLocals)
238bc36eafdSMike Gerdts {
239bc36eafdSMike Gerdts return (AE_OK);
240bc36eafdSMike Gerdts }
241bc36eafdSMike Gerdts
242bc36eafdSMike Gerdts MethodLocals = (ASL_METHOD_LOCAL *) Node->MethodLocals;
243bc36eafdSMike Gerdts MethodArgs = (ASL_METHOD_LOCAL *) Node->MethodArgs;
244bc36eafdSMike Gerdts
245bc36eafdSMike Gerdts /*
246bc36eafdSMike Gerdts * Analysis of LocalX variables
247bc36eafdSMike Gerdts */
248bc36eafdSMike Gerdts for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++)
249bc36eafdSMike Gerdts {
250bc36eafdSMike Gerdts /* Warn for Locals that are set but never referenced */
251bc36eafdSMike Gerdts
252bc36eafdSMike Gerdts if ((MethodLocals[i].Flags & ASL_LOCAL_INITIALIZED) &&
253bc36eafdSMike Gerdts (!(MethodLocals[i].Flags & ASL_LOCAL_REFERENCED)))
254bc36eafdSMike Gerdts {
255bc36eafdSMike Gerdts sprintf (MsgBuffer, "Local%u", i);
256bc36eafdSMike Gerdts AslError (ASL_WARNING, ASL_MSG_LOCAL_NOT_USED,
257bc36eafdSMike Gerdts MethodLocals[i].Op, MsgBuffer);
258bc36eafdSMike Gerdts }
259bc36eafdSMike Gerdts }
260bc36eafdSMike Gerdts
261bc36eafdSMike Gerdts /*
262bc36eafdSMike Gerdts * Analysis of ArgX variables (standard method arguments,
263bc36eafdSMike Gerdts * and remaining unused ArgX can also be used as locals)
264bc36eafdSMike Gerdts */
265bc36eafdSMike Gerdts for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++)
266bc36eafdSMike Gerdts {
267bc36eafdSMike Gerdts if (MethodArgs[i].Flags & ASL_ARG_IS_LOCAL)
268bc36eafdSMike Gerdts {
269bc36eafdSMike Gerdts /* Warn if ArgX is being used as a local, but not referenced */
270bc36eafdSMike Gerdts
271bc36eafdSMike Gerdts if ((MethodArgs[i].Flags & ASL_ARG_INITIALIZED) &&
272bc36eafdSMike Gerdts (!(MethodArgs[i].Flags & ASL_ARG_REFERENCED)))
273bc36eafdSMike Gerdts {
274bc36eafdSMike Gerdts sprintf (MsgBuffer, "Arg%u", i);
275bc36eafdSMike Gerdts AslError (ASL_WARNING, ASL_MSG_ARG_AS_LOCAL_NOT_USED,
276bc36eafdSMike Gerdts MethodArgs[i].Op, MsgBuffer);
277bc36eafdSMike Gerdts }
278bc36eafdSMike Gerdts }
279bc36eafdSMike Gerdts else
280bc36eafdSMike Gerdts {
281bc36eafdSMike Gerdts /*
282bc36eafdSMike Gerdts * Remark if a normal method ArgX is not referenced.
283bc36eafdSMike Gerdts * We ignore the predefined methods since often, not
284bc36eafdSMike Gerdts * all arguments are needed or used.
285bc36eafdSMike Gerdts */
286bc36eafdSMike Gerdts if ((Node->Name.Ascii[0] != '_') &&
287bc36eafdSMike Gerdts (!(MethodArgs[i].Flags & ASL_ARG_REFERENCED)))
288bc36eafdSMike Gerdts {
289bc36eafdSMike Gerdts sprintf (MsgBuffer, "Arg%u", i);
290bc36eafdSMike Gerdts AslError (ASL_REMARK, ASL_MSG_ARG_NOT_USED,
291bc36eafdSMike Gerdts MethodArgs[i].Op, MsgBuffer);
292bc36eafdSMike Gerdts }
293bc36eafdSMike Gerdts }
294bc36eafdSMike Gerdts }
295bc36eafdSMike Gerdts }
296bc36eafdSMike Gerdts
297bc36eafdSMike Gerdts /* Referenced flag is set during the namespace xref */
298bc36eafdSMike Gerdts
299bc36eafdSMike Gerdts if (Node->Flags & ANOBJ_IS_REFERENCED)
300bc36eafdSMike Gerdts {
301bc36eafdSMike Gerdts return (AE_OK);
302bc36eafdSMike Gerdts }
303bc36eafdSMike Gerdts
304bc36eafdSMike Gerdts if (!Node->Op)
305bc36eafdSMike Gerdts {
306bc36eafdSMike Gerdts return (AE_OK);
307bc36eafdSMike Gerdts }
308bc36eafdSMike Gerdts
309bc36eafdSMike Gerdts /* These types are typically never directly referenced, ignore them */
310bc36eafdSMike Gerdts
311bc36eafdSMike Gerdts switch (Node->Type)
312bc36eafdSMike Gerdts {
313bc36eafdSMike Gerdts case ACPI_TYPE_DEVICE:
314bc36eafdSMike Gerdts case ACPI_TYPE_PROCESSOR:
315bc36eafdSMike Gerdts case ACPI_TYPE_POWER:
316bc36eafdSMike Gerdts case ACPI_TYPE_THERMAL:
317bc36eafdSMike Gerdts case ACPI_TYPE_LOCAL_RESOURCE:
318bc36eafdSMike Gerdts case ACPI_TYPE_LOCAL_RESOURCE_FIELD: /* Names assigned to descriptor elements */
319bc36eafdSMike Gerdts
320bc36eafdSMike Gerdts return (AE_OK);
321bc36eafdSMike Gerdts
322bc36eafdSMike Gerdts default:
323bc36eafdSMike Gerdts
324bc36eafdSMike Gerdts break;
325bc36eafdSMike Gerdts }
326bc36eafdSMike Gerdts
327bc36eafdSMike Gerdts /* Determine if the name is within a control method */
328bc36eafdSMike Gerdts
329bc36eafdSMike Gerdts Next = Node->Parent;
330bc36eafdSMike Gerdts while (Next)
331bc36eafdSMike Gerdts {
332bc36eafdSMike Gerdts if (Next->Type == ACPI_TYPE_METHOD)
333bc36eafdSMike Gerdts {
334bc36eafdSMike Gerdts /*
335bc36eafdSMike Gerdts * Name is within a method, therefore it is temporary.
336bc36eafdSMike Gerdts * Issue a remark even if it is a reserved name (starts
337bc36eafdSMike Gerdts * with an underscore).
338bc36eafdSMike Gerdts */
339bc36eafdSMike Gerdts sprintf (MsgBuffer, "Name [%4.4s] is within a method [%4.4s]",
340bc36eafdSMike Gerdts Node->Name.Ascii, Next->Name.Ascii);
341bc36eafdSMike Gerdts AslError (ASL_REMARK, ASL_MSG_NOT_REFERENCED,
342bc36eafdSMike Gerdts LkGetNameOp (Node->Op), MsgBuffer);
343bc36eafdSMike Gerdts return (AE_OK);
344bc36eafdSMike Gerdts }
345bc36eafdSMike Gerdts
346bc36eafdSMike Gerdts Next = Next->Parent;
347bc36eafdSMike Gerdts }
348bc36eafdSMike Gerdts
349bc36eafdSMike Gerdts /* The name is not within a control method */
350bc36eafdSMike Gerdts
351bc36eafdSMike Gerdts /*
352bc36eafdSMike Gerdts * Ignore names that start with an underscore. These are the reserved
353bc36eafdSMike Gerdts * ACPI names and are typically not referenced since they are meant
354bc36eafdSMike Gerdts * to be called by the host OS.
355bc36eafdSMike Gerdts */
356bc36eafdSMike Gerdts if (Node->Name.Ascii[0] == '_')
357bc36eafdSMike Gerdts {
358bc36eafdSMike Gerdts return (AE_OK);
359bc36eafdSMike Gerdts }
360bc36eafdSMike Gerdts
361bc36eafdSMike Gerdts /*
362bc36eafdSMike Gerdts * What remains is an unresolved user name that is not within a method.
363bc36eafdSMike Gerdts * However, the object could be referenced via another table, so issue
364bc36eafdSMike Gerdts * the warning at level 2.
365bc36eafdSMike Gerdts */
366bc36eafdSMike Gerdts AslError (ASL_WARNING2, ASL_MSG_NOT_REFERENCED,
367bc36eafdSMike Gerdts LkGetNameOp (Node->Op), NULL);
368bc36eafdSMike Gerdts return (AE_OK);
369bc36eafdSMike Gerdts }
370bc36eafdSMike Gerdts
371bc36eafdSMike Gerdts
372bc36eafdSMike Gerdts /*******************************************************************************
373bc36eafdSMike Gerdts *
374bc36eafdSMike Gerdts * FUNCTION: LkGetNameOp
375bc36eafdSMike Gerdts *
376bc36eafdSMike Gerdts * PARAMETERS: Op - Current Op
377bc36eafdSMike Gerdts *
378bc36eafdSMike Gerdts * RETURN: NameOp associated with the input op
379bc36eafdSMike Gerdts *
380bc36eafdSMike Gerdts * DESCRIPTION: Find the name declaration op associated with the operator
381bc36eafdSMike Gerdts *
382bc36eafdSMike Gerdts ******************************************************************************/
383bc36eafdSMike Gerdts
384bc36eafdSMike Gerdts static ACPI_PARSE_OBJECT *
LkGetNameOp(ACPI_PARSE_OBJECT * Op)385bc36eafdSMike Gerdts LkGetNameOp (
386bc36eafdSMike Gerdts ACPI_PARSE_OBJECT *Op)
387bc36eafdSMike Gerdts {
388bc36eafdSMike Gerdts const ACPI_OPCODE_INFO *OpInfo;
389bc36eafdSMike Gerdts ACPI_PARSE_OBJECT *NameOp = Op;
390bc36eafdSMike Gerdts
391bc36eafdSMike Gerdts
392bc36eafdSMike Gerdts OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
393bc36eafdSMike Gerdts
394bc36eafdSMike Gerdts
395bc36eafdSMike Gerdts /* Get the NamePath from the appropriate place */
396bc36eafdSMike Gerdts
397bc36eafdSMike Gerdts if (OpInfo->Flags & AML_NAMED)
398bc36eafdSMike Gerdts {
399bc36eafdSMike Gerdts /* For nearly all NAMED operators, the name reference is the first child */
400bc36eafdSMike Gerdts
401bc36eafdSMike Gerdts NameOp = Op->Asl.Child;
402bc36eafdSMike Gerdts if (Op->Asl.AmlOpcode == AML_ALIAS_OP)
403bc36eafdSMike Gerdts {
404bc36eafdSMike Gerdts /*
405bc36eafdSMike Gerdts * ALIAS is the only oddball opcode, the name declaration
406bc36eafdSMike Gerdts * (alias name) is the second operand
407bc36eafdSMike Gerdts */
408bc36eafdSMike Gerdts NameOp = Op->Asl.Child->Asl.Next;
409bc36eafdSMike Gerdts }
410bc36eafdSMike Gerdts }
411bc36eafdSMike Gerdts else if (OpInfo->Flags & AML_CREATE)
412bc36eafdSMike Gerdts {
413bc36eafdSMike Gerdts /* Name must appear as the last parameter */
414bc36eafdSMike Gerdts
415bc36eafdSMike Gerdts NameOp = Op->Asl.Child;
416*35786f68SRobert Mustacchi while (!(NameOp->Asl.CompileFlags & OP_IS_NAME_DECLARATION))
417bc36eafdSMike Gerdts {
418bc36eafdSMike Gerdts NameOp = NameOp->Asl.Next;
419bc36eafdSMike Gerdts }
420bc36eafdSMike Gerdts }
421bc36eafdSMike Gerdts
422bc36eafdSMike Gerdts return (NameOp);
423bc36eafdSMike Gerdts }
424