1bc36eafdSMike Gerdts /*******************************************************************************
2bc36eafdSMike Gerdts *
3bc36eafdSMike Gerdts * Module Name: nseval - Object evaluation, includes control method execution
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 *
67*35786f68SRobert Mustacchi * 3.3. Redistribution of Executable. Redistribution in executable form of any
68*35786f68SRobert Mustacchi * substantial portion of the Covered Code or modification must reproduce the
69*35786f68SRobert Mustacchi * above Copyright Notice, and the following Disclaimer and Export Compliance
70*35786f68SRobert Mustacchi * provision in the documentation and/or other materials provided with the
71*35786f68SRobert Mustacchi * distribution.
72*35786f68SRobert Mustacchi *
73*35786f68SRobert Mustacchi * 3.4. Intel retains all right, title, and interest in and to the Original
74*35786f68SRobert Mustacchi * Intel Code.
75*35786f68SRobert Mustacchi *
76*35786f68SRobert Mustacchi * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77*35786f68SRobert Mustacchi * Intel shall be used in advertising or otherwise to promote the sale, use or
78*35786f68SRobert Mustacchi * other dealings in products derived from or relating to the Covered Code
79*35786f68SRobert Mustacchi * without prior written authorization from Intel.
80*35786f68SRobert Mustacchi *
81*35786f68SRobert Mustacchi * 4. Disclaimer and Export Compliance
82*35786f68SRobert Mustacchi *
83*35786f68SRobert Mustacchi * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84*35786f68SRobert Mustacchi * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85*35786f68SRobert Mustacchi * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86*35786f68SRobert Mustacchi * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87*35786f68SRobert Mustacchi * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88*35786f68SRobert Mustacchi * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
89*35786f68SRobert Mustacchi * PARTICULAR PURPOSE.
90*35786f68SRobert Mustacchi *
91*35786f68SRobert Mustacchi * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92*35786f68SRobert Mustacchi * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93*35786f68SRobert Mustacchi * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94*35786f68SRobert Mustacchi * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95*35786f68SRobert Mustacchi * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96*35786f68SRobert Mustacchi * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97*35786f68SRobert Mustacchi * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
98*35786f68SRobert Mustacchi * LIMITED REMEDY.
99*35786f68SRobert Mustacchi *
100*35786f68SRobert Mustacchi * 4.3. Licensee shall not export, either directly or indirectly, any of this
101*35786f68SRobert Mustacchi * software or system incorporating such software without first obtaining any
102*35786f68SRobert Mustacchi * required license or other approval from the U. S. Department of Commerce or
103*35786f68SRobert Mustacchi * any other agency or department of the United States Government. In the
104*35786f68SRobert Mustacchi * event Licensee exports any such software from the United States or
105*35786f68SRobert Mustacchi * re-exports any such software from a foreign destination, Licensee shall
106*35786f68SRobert Mustacchi * ensure that the distribution and export/re-export of the software is in
107*35786f68SRobert Mustacchi * compliance with all laws, regulations, orders, or other restrictions of the
108*35786f68SRobert Mustacchi * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109*35786f68SRobert Mustacchi * any of its subsidiaries will export/re-export any technical data, process,
110*35786f68SRobert Mustacchi * software, or service, directly or indirectly, to any country for which the
111*35786f68SRobert Mustacchi * United States government or any agency thereof requires an export license,
112*35786f68SRobert Mustacchi * other governmental approval, or letter of assurance, without first obtaining
113*35786f68SRobert Mustacchi * such license, approval or letter.
114*35786f68SRobert Mustacchi *
115*35786f68SRobert Mustacchi *****************************************************************************
116*35786f68SRobert Mustacchi *
117*35786f68SRobert Mustacchi * Alternatively, you may choose to be licensed under the terms of the
118*35786f68SRobert Mustacchi * following license:
119*35786f68SRobert Mustacchi *
120bc36eafdSMike Gerdts * Redistribution and use in source and binary forms, with or without
121bc36eafdSMike Gerdts * modification, are permitted provided that the following conditions
122bc36eafdSMike Gerdts * are met:
123bc36eafdSMike Gerdts * 1. Redistributions of source code must retain the above copyright
124bc36eafdSMike Gerdts * notice, this list of conditions, and the following disclaimer,
125bc36eafdSMike Gerdts * without modification.
126bc36eafdSMike Gerdts * 2. Redistributions in binary form must reproduce at minimum a disclaimer
127bc36eafdSMike Gerdts * substantially similar to the "NO WARRANTY" disclaimer below
128bc36eafdSMike Gerdts * ("Disclaimer") and any redistribution must be conditioned upon
129bc36eafdSMike Gerdts * including a substantially similar Disclaimer requirement for further
130bc36eafdSMike Gerdts * binary redistribution.
131bc36eafdSMike Gerdts * 3. Neither the names of the above-listed copyright holders nor the names
132bc36eafdSMike Gerdts * of any contributors may be used to endorse or promote products derived
133bc36eafdSMike Gerdts * from this software without specific prior written permission.
134bc36eafdSMike Gerdts *
135*35786f68SRobert Mustacchi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
136*35786f68SRobert Mustacchi * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
137*35786f68SRobert Mustacchi * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
138*35786f68SRobert Mustacchi * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
139*35786f68SRobert Mustacchi * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
140*35786f68SRobert Mustacchi * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
141*35786f68SRobert Mustacchi * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
142*35786f68SRobert Mustacchi * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
143*35786f68SRobert Mustacchi * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
144*35786f68SRobert Mustacchi * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
145*35786f68SRobert Mustacchi * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
146*35786f68SRobert Mustacchi *
147*35786f68SRobert Mustacchi * Alternatively, you may choose to be licensed under the terms of the
148bc36eafdSMike Gerdts * GNU General Public License ("GPL") version 2 as published by the Free
149bc36eafdSMike Gerdts * Software Foundation.
150bc36eafdSMike Gerdts *
151*35786f68SRobert Mustacchi *****************************************************************************/
152bc36eafdSMike Gerdts
153bc36eafdSMike Gerdts #include "acpi.h"
154bc36eafdSMike Gerdts #include "accommon.h"
155bc36eafdSMike Gerdts #include "acparser.h"
156bc36eafdSMike Gerdts #include "acinterp.h"
157bc36eafdSMike Gerdts #include "acnamesp.h"
158bc36eafdSMike Gerdts
159bc36eafdSMike Gerdts
160bc36eafdSMike Gerdts #define _COMPONENT ACPI_NAMESPACE
161bc36eafdSMike Gerdts ACPI_MODULE_NAME ("nseval")
162bc36eafdSMike Gerdts
163bc36eafdSMike Gerdts /* Local prototypes */
164bc36eafdSMike Gerdts
165bc36eafdSMike Gerdts static void
166bc36eafdSMike Gerdts AcpiNsExecModuleCode (
167bc36eafdSMike Gerdts ACPI_OPERAND_OBJECT *MethodObj,
168bc36eafdSMike Gerdts ACPI_EVALUATE_INFO *Info);
169bc36eafdSMike Gerdts
170bc36eafdSMike Gerdts
171bc36eafdSMike Gerdts /*******************************************************************************
172bc36eafdSMike Gerdts *
173bc36eafdSMike Gerdts * FUNCTION: AcpiNsEvaluate
174bc36eafdSMike Gerdts *
175bc36eafdSMike Gerdts * PARAMETERS: Info - Evaluation info block, contains these fields
176bc36eafdSMike Gerdts * and more:
177bc36eafdSMike Gerdts * PrefixNode - Prefix or Method/Object Node to execute
178bc36eafdSMike Gerdts * RelativePath - Name of method to execute, If NULL, the
179bc36eafdSMike Gerdts * Node is the object to execute
180bc36eafdSMike Gerdts * Parameters - List of parameters to pass to the method,
181bc36eafdSMike Gerdts * terminated by NULL. Params itself may be
182bc36eafdSMike Gerdts * NULL if no parameters are being passed.
183bc36eafdSMike Gerdts * ParameterType - Type of Parameter list
184bc36eafdSMike Gerdts * ReturnObject - Where to put method's return value (if
185bc36eafdSMike Gerdts * any). If NULL, no value is returned.
186bc36eafdSMike Gerdts * Flags - ACPI_IGNORE_RETURN_VALUE to delete return
187bc36eafdSMike Gerdts *
188bc36eafdSMike Gerdts * RETURN: Status
189bc36eafdSMike Gerdts *
190bc36eafdSMike Gerdts * DESCRIPTION: Execute a control method or return the current value of an
191bc36eafdSMike Gerdts * ACPI namespace object.
192bc36eafdSMike Gerdts *
193bc36eafdSMike Gerdts * MUTEX: Locks interpreter
194bc36eafdSMike Gerdts *
195bc36eafdSMike Gerdts ******************************************************************************/
196bc36eafdSMike Gerdts
197bc36eafdSMike Gerdts ACPI_STATUS
AcpiNsEvaluate(ACPI_EVALUATE_INFO * Info)198bc36eafdSMike Gerdts AcpiNsEvaluate (
199bc36eafdSMike Gerdts ACPI_EVALUATE_INFO *Info)
200bc36eafdSMike Gerdts {
201bc36eafdSMike Gerdts ACPI_STATUS Status;
202bc36eafdSMike Gerdts
203bc36eafdSMike Gerdts
204bc36eafdSMike Gerdts ACPI_FUNCTION_TRACE (NsEvaluate);
205bc36eafdSMike Gerdts
206bc36eafdSMike Gerdts
207bc36eafdSMike Gerdts if (!Info)
208bc36eafdSMike Gerdts {
209bc36eafdSMike Gerdts return_ACPI_STATUS (AE_BAD_PARAMETER);
210bc36eafdSMike Gerdts }
211bc36eafdSMike Gerdts
212bc36eafdSMike Gerdts if (!Info->Node)
213bc36eafdSMike Gerdts {
214bc36eafdSMike Gerdts /*
215bc36eafdSMike Gerdts * Get the actual namespace node for the target object if we
216bc36eafdSMike Gerdts * need to. Handles these cases:
217bc36eafdSMike Gerdts *
218bc36eafdSMike Gerdts * 1) Null node, valid pathname from root (absolute path)
219bc36eafdSMike Gerdts * 2) Node and valid pathname (path relative to Node)
220bc36eafdSMike Gerdts * 3) Node, Null pathname
221bc36eafdSMike Gerdts */
222bc36eafdSMike Gerdts Status = AcpiNsGetNode (Info->PrefixNode, Info->RelativePathname,
223bc36eafdSMike Gerdts ACPI_NS_NO_UPSEARCH, &Info->Node);
224bc36eafdSMike Gerdts if (ACPI_FAILURE (Status))
225bc36eafdSMike Gerdts {
226bc36eafdSMike Gerdts return_ACPI_STATUS (Status);
227bc36eafdSMike Gerdts }
228bc36eafdSMike Gerdts }
229bc36eafdSMike Gerdts
230bc36eafdSMike Gerdts /*
231bc36eafdSMike Gerdts * For a method alias, we must grab the actual method node so that
232bc36eafdSMike Gerdts * proper scoping context will be established before execution.
233bc36eafdSMike Gerdts */
234bc36eafdSMike Gerdts if (AcpiNsGetType (Info->Node) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
235bc36eafdSMike Gerdts {
236bc36eafdSMike Gerdts Info->Node = ACPI_CAST_PTR (
237bc36eafdSMike Gerdts ACPI_NAMESPACE_NODE, Info->Node->Object);
238bc36eafdSMike Gerdts }
239bc36eafdSMike Gerdts
240bc36eafdSMike Gerdts /* Complete the info block initialization */
241bc36eafdSMike Gerdts
242bc36eafdSMike Gerdts Info->ReturnObject = NULL;
243bc36eafdSMike Gerdts Info->NodeFlags = Info->Node->Flags;
244bc36eafdSMike Gerdts Info->ObjDesc = AcpiNsGetAttachedObject (Info->Node);
245bc36eafdSMike Gerdts
246bc36eafdSMike Gerdts ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n",
247bc36eafdSMike Gerdts Info->RelativePathname, Info->Node,
248bc36eafdSMike Gerdts AcpiNsGetAttachedObject (Info->Node)));
249bc36eafdSMike Gerdts
250bc36eafdSMike Gerdts /* Get info if we have a predefined name (_HID, etc.) */
251bc36eafdSMike Gerdts
252bc36eafdSMike Gerdts Info->Predefined = AcpiUtMatchPredefinedMethod (Info->Node->Name.Ascii);
253bc36eafdSMike Gerdts
254bc36eafdSMike Gerdts /* Get the full pathname to the object, for use in warning messages */
255bc36eafdSMike Gerdts
256bc36eafdSMike Gerdts Info->FullPathname = AcpiNsGetNormalizedPathname (Info->Node, TRUE);
257bc36eafdSMike Gerdts if (!Info->FullPathname)
258bc36eafdSMike Gerdts {
259bc36eafdSMike Gerdts return_ACPI_STATUS (AE_NO_MEMORY);
260bc36eafdSMike Gerdts }
261bc36eafdSMike Gerdts
262bc36eafdSMike Gerdts /* Count the number of arguments being passed in */
263bc36eafdSMike Gerdts
264bc36eafdSMike Gerdts Info->ParamCount = 0;
265bc36eafdSMike Gerdts if (Info->Parameters)
266bc36eafdSMike Gerdts {
267bc36eafdSMike Gerdts while (Info->Parameters[Info->ParamCount])
268bc36eafdSMike Gerdts {
269bc36eafdSMike Gerdts Info->ParamCount++;
270bc36eafdSMike Gerdts }
271bc36eafdSMike Gerdts
272bc36eafdSMike Gerdts /* Warn on impossible argument count */
273bc36eafdSMike Gerdts
274bc36eafdSMike Gerdts if (Info->ParamCount > ACPI_METHOD_NUM_ARGS)
275bc36eafdSMike Gerdts {
276bc36eafdSMike Gerdts ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS,
277bc36eafdSMike Gerdts "Excess arguments (%u) - using only %u",
278bc36eafdSMike Gerdts Info->ParamCount, ACPI_METHOD_NUM_ARGS));
279bc36eafdSMike Gerdts
280bc36eafdSMike Gerdts Info->ParamCount = ACPI_METHOD_NUM_ARGS;
281bc36eafdSMike Gerdts }
282bc36eafdSMike Gerdts }
283bc36eafdSMike Gerdts
284bc36eafdSMike Gerdts /*
285bc36eafdSMike Gerdts * For predefined names: Check that the declared argument count
286bc36eafdSMike Gerdts * matches the ACPI spec -- otherwise this is a BIOS error.
287bc36eafdSMike Gerdts */
288bc36eafdSMike Gerdts AcpiNsCheckAcpiCompliance (Info->FullPathname, Info->Node,
289bc36eafdSMike Gerdts Info->Predefined);
290bc36eafdSMike Gerdts
291bc36eafdSMike Gerdts /*
292bc36eafdSMike Gerdts * For all names: Check that the incoming argument count for
293bc36eafdSMike Gerdts * this method/object matches the actual ASL/AML definition.
294bc36eafdSMike Gerdts */
295bc36eafdSMike Gerdts AcpiNsCheckArgumentCount (Info->FullPathname, Info->Node,
296bc36eafdSMike Gerdts Info->ParamCount, Info->Predefined);
297bc36eafdSMike Gerdts
298bc36eafdSMike Gerdts /* For predefined names: Typecheck all incoming arguments */
299bc36eafdSMike Gerdts
300bc36eafdSMike Gerdts AcpiNsCheckArgumentTypes (Info);
301bc36eafdSMike Gerdts
302bc36eafdSMike Gerdts /*
303bc36eafdSMike Gerdts * Three major evaluation cases:
304bc36eafdSMike Gerdts *
305bc36eafdSMike Gerdts * 1) Object types that cannot be evaluated by definition
306bc36eafdSMike Gerdts * 2) The object is a control method -- execute it
307bc36eafdSMike Gerdts * 3) The object is not a method -- just return it's current value
308bc36eafdSMike Gerdts */
309bc36eafdSMike Gerdts switch (AcpiNsGetType (Info->Node))
310bc36eafdSMike Gerdts {
311*35786f68SRobert Mustacchi case ACPI_TYPE_ANY:
312bc36eafdSMike Gerdts case ACPI_TYPE_DEVICE:
313bc36eafdSMike Gerdts case ACPI_TYPE_EVENT:
314bc36eafdSMike Gerdts case ACPI_TYPE_MUTEX:
315bc36eafdSMike Gerdts case ACPI_TYPE_REGION:
316bc36eafdSMike Gerdts case ACPI_TYPE_THERMAL:
317bc36eafdSMike Gerdts case ACPI_TYPE_LOCAL_SCOPE:
318bc36eafdSMike Gerdts /*
319*35786f68SRobert Mustacchi * 1) Disallow evaluation of these object types. For these,
320*35786f68SRobert Mustacchi * object evaluation is undefined.
321bc36eafdSMike Gerdts */
322bc36eafdSMike Gerdts ACPI_ERROR ((AE_INFO,
323*35786f68SRobert Mustacchi "%s: This object type [%s] "
324*35786f68SRobert Mustacchi "never contains data and cannot be evaluated",
325*35786f68SRobert Mustacchi Info->FullPathname, AcpiUtGetTypeName (Info->Node->Type)));
326bc36eafdSMike Gerdts
327bc36eafdSMike Gerdts Status = AE_TYPE;
328bc36eafdSMike Gerdts goto Cleanup;
329bc36eafdSMike Gerdts
330bc36eafdSMike Gerdts case ACPI_TYPE_METHOD:
331bc36eafdSMike Gerdts /*
332bc36eafdSMike Gerdts * 2) Object is a control method - execute it
333bc36eafdSMike Gerdts */
334bc36eafdSMike Gerdts
335bc36eafdSMike Gerdts /* Verify that there is a method object associated with this node */
336bc36eafdSMike Gerdts
337bc36eafdSMike Gerdts if (!Info->ObjDesc)
338bc36eafdSMike Gerdts {
339bc36eafdSMike Gerdts ACPI_ERROR ((AE_INFO, "%s: Method has no attached sub-object",
340bc36eafdSMike Gerdts Info->FullPathname));
341bc36eafdSMike Gerdts Status = AE_NULL_OBJECT;
342bc36eafdSMike Gerdts goto Cleanup;
343bc36eafdSMike Gerdts }
344bc36eafdSMike Gerdts
345bc36eafdSMike Gerdts ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
346bc36eafdSMike Gerdts "**** Execute method [%s] at AML address %p length %X\n",
347bc36eafdSMike Gerdts Info->FullPathname,
348bc36eafdSMike Gerdts Info->ObjDesc->Method.AmlStart + 1,
349bc36eafdSMike Gerdts Info->ObjDesc->Method.AmlLength - 1));
350bc36eafdSMike Gerdts
351bc36eafdSMike Gerdts /*
352bc36eafdSMike Gerdts * Any namespace deletion must acquire both the namespace and
353bc36eafdSMike Gerdts * interpreter locks to ensure that no thread is using the portion of
354bc36eafdSMike Gerdts * the namespace that is being deleted.
355bc36eafdSMike Gerdts *
356bc36eafdSMike Gerdts * Execute the method via the interpreter. The interpreter is locked
357bc36eafdSMike Gerdts * here before calling into the AML parser
358bc36eafdSMike Gerdts */
359bc36eafdSMike Gerdts AcpiExEnterInterpreter ();
360bc36eafdSMike Gerdts Status = AcpiPsExecuteMethod (Info);
361bc36eafdSMike Gerdts AcpiExExitInterpreter ();
362bc36eafdSMike Gerdts break;
363bc36eafdSMike Gerdts
364bc36eafdSMike Gerdts default:
365bc36eafdSMike Gerdts /*
366bc36eafdSMike Gerdts * 3) All other non-method objects -- get the current object value
367bc36eafdSMike Gerdts */
368bc36eafdSMike Gerdts
369bc36eafdSMike Gerdts /*
370bc36eafdSMike Gerdts * Some objects require additional resolution steps (e.g., the Node
371bc36eafdSMike Gerdts * may be a field that must be read, etc.) -- we can't just grab
372bc36eafdSMike Gerdts * the object out of the node.
373bc36eafdSMike Gerdts *
374bc36eafdSMike Gerdts * Use ResolveNodeToValue() to get the associated value.
375bc36eafdSMike Gerdts *
376bc36eafdSMike Gerdts * NOTE: we can get away with passing in NULL for a walk state because
377bc36eafdSMike Gerdts * the Node is guaranteed to not be a reference to either a method
378bc36eafdSMike Gerdts * local or a method argument (because this interface is never called
379bc36eafdSMike Gerdts * from a running method.)
380bc36eafdSMike Gerdts *
381bc36eafdSMike Gerdts * Even though we do not directly invoke the interpreter for object
382bc36eafdSMike Gerdts * resolution, we must lock it because we could access an OpRegion.
383bc36eafdSMike Gerdts * The OpRegion access code assumes that the interpreter is locked.
384bc36eafdSMike Gerdts */
385bc36eafdSMike Gerdts AcpiExEnterInterpreter ();
386bc36eafdSMike Gerdts
387bc36eafdSMike Gerdts /* TBD: ResolveNodeToValue has a strange interface, fix */
388bc36eafdSMike Gerdts
389bc36eafdSMike Gerdts Info->ReturnObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->Node);
390bc36eafdSMike Gerdts
391bc36eafdSMike Gerdts Status = AcpiExResolveNodeToValue (ACPI_CAST_INDIRECT_PTR (
392bc36eafdSMike Gerdts ACPI_NAMESPACE_NODE, &Info->ReturnObject), NULL);
393bc36eafdSMike Gerdts AcpiExExitInterpreter ();
394bc36eafdSMike Gerdts
395bc36eafdSMike Gerdts if (ACPI_FAILURE (Status))
396bc36eafdSMike Gerdts {
397bc36eafdSMike Gerdts Info->ReturnObject = NULL;
398bc36eafdSMike Gerdts goto Cleanup;
399bc36eafdSMike Gerdts }
400bc36eafdSMike Gerdts
401bc36eafdSMike Gerdts ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Returned object %p [%s]\n",
402bc36eafdSMike Gerdts Info->ReturnObject,
403bc36eafdSMike Gerdts AcpiUtGetObjectTypeName (Info->ReturnObject)));
404bc36eafdSMike Gerdts
405bc36eafdSMike Gerdts Status = AE_CTRL_RETURN_VALUE; /* Always has a "return value" */
406bc36eafdSMike Gerdts break;
407bc36eafdSMike Gerdts }
408bc36eafdSMike Gerdts
409bc36eafdSMike Gerdts /*
410bc36eafdSMike Gerdts * For predefined names, check the return value against the ACPI
411bc36eafdSMike Gerdts * specification. Some incorrect return value types are repaired.
412bc36eafdSMike Gerdts */
413bc36eafdSMike Gerdts (void) AcpiNsCheckReturnValue (Info->Node, Info, Info->ParamCount,
414bc36eafdSMike Gerdts Status, &Info->ReturnObject);
415bc36eafdSMike Gerdts
416bc36eafdSMike Gerdts /* Check if there is a return value that must be dealt with */
417bc36eafdSMike Gerdts
418bc36eafdSMike Gerdts if (Status == AE_CTRL_RETURN_VALUE)
419bc36eafdSMike Gerdts {
420bc36eafdSMike Gerdts /* If caller does not want the return value, delete it */
421bc36eafdSMike Gerdts
422bc36eafdSMike Gerdts if (Info->Flags & ACPI_IGNORE_RETURN_VALUE)
423bc36eafdSMike Gerdts {
424bc36eafdSMike Gerdts AcpiUtRemoveReference (Info->ReturnObject);
425bc36eafdSMike Gerdts Info->ReturnObject = NULL;
426bc36eafdSMike Gerdts }
427bc36eafdSMike Gerdts
428bc36eafdSMike Gerdts /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */
429bc36eafdSMike Gerdts
430bc36eafdSMike Gerdts Status = AE_OK;
431bc36eafdSMike Gerdts }
432*35786f68SRobert Mustacchi else if (ACPI_FAILURE(Status))
433*35786f68SRobert Mustacchi {
434*35786f68SRobert Mustacchi /* If ReturnObject exists, delete it */
435*35786f68SRobert Mustacchi
436*35786f68SRobert Mustacchi if (Info->ReturnObject)
437*35786f68SRobert Mustacchi {
438*35786f68SRobert Mustacchi AcpiUtRemoveReference (Info->ReturnObject);
439*35786f68SRobert Mustacchi Info->ReturnObject = NULL;
440*35786f68SRobert Mustacchi }
441*35786f68SRobert Mustacchi }
442bc36eafdSMike Gerdts
443bc36eafdSMike Gerdts ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
444bc36eafdSMike Gerdts "*** Completed evaluation of object %s ***\n",
445bc36eafdSMike Gerdts Info->RelativePathname));
446bc36eafdSMike Gerdts
447bc36eafdSMike Gerdts Cleanup:
448bc36eafdSMike Gerdts /*
449bc36eafdSMike Gerdts * Namespace was unlocked by the handling AcpiNs* function, so we
450bc36eafdSMike Gerdts * just free the pathname and return
451bc36eafdSMike Gerdts */
452bc36eafdSMike Gerdts ACPI_FREE (Info->FullPathname);
453bc36eafdSMike Gerdts Info->FullPathname = NULL;
454bc36eafdSMike Gerdts return_ACPI_STATUS (Status);
455bc36eafdSMike Gerdts }
456bc36eafdSMike Gerdts
457bc36eafdSMike Gerdts
458bc36eafdSMike Gerdts /*******************************************************************************
459bc36eafdSMike Gerdts *
460bc36eafdSMike Gerdts * FUNCTION: AcpiNsExecModuleCodeList
461bc36eafdSMike Gerdts *
462bc36eafdSMike Gerdts * PARAMETERS: None
463bc36eafdSMike Gerdts *
464bc36eafdSMike Gerdts * RETURN: None. Exceptions during method execution are ignored, since
465bc36eafdSMike Gerdts * we cannot abort a table load.
466bc36eafdSMike Gerdts *
467bc36eafdSMike Gerdts * DESCRIPTION: Execute all elements of the global module-level code list.
468bc36eafdSMike Gerdts * Each element is executed as a single control method.
469bc36eafdSMike Gerdts *
470*35786f68SRobert Mustacchi * NOTE: With this option enabled, each block of detected executable AML
471*35786f68SRobert Mustacchi * code that is outside of any control method is wrapped with a temporary
472*35786f68SRobert Mustacchi * control method object and placed on a global list. The methods on this
473*35786f68SRobert Mustacchi * list are executed below.
474*35786f68SRobert Mustacchi *
475*35786f68SRobert Mustacchi * This function executes the module-level code for all tables only after
476*35786f68SRobert Mustacchi * all of the tables have been loaded. It is a legacy option and is
477*35786f68SRobert Mustacchi * not compatible with other ACPI implementations. See AcpiNsLoadTable.
478*35786f68SRobert Mustacchi *
479*35786f68SRobert Mustacchi * This function will be removed when the legacy option is removed.
480*35786f68SRobert Mustacchi *
481bc36eafdSMike Gerdts ******************************************************************************/
482bc36eafdSMike Gerdts
483bc36eafdSMike Gerdts void
AcpiNsExecModuleCodeList(void)484bc36eafdSMike Gerdts AcpiNsExecModuleCodeList (
485bc36eafdSMike Gerdts void)
486bc36eafdSMike Gerdts {
487bc36eafdSMike Gerdts ACPI_OPERAND_OBJECT *Prev;
488bc36eafdSMike Gerdts ACPI_OPERAND_OBJECT *Next;
489bc36eafdSMike Gerdts ACPI_EVALUATE_INFO *Info;
490bc36eafdSMike Gerdts UINT32 MethodCount = 0;
491bc36eafdSMike Gerdts
492bc36eafdSMike Gerdts
493bc36eafdSMike Gerdts ACPI_FUNCTION_TRACE (NsExecModuleCodeList);
494bc36eafdSMike Gerdts
495bc36eafdSMike Gerdts
496bc36eafdSMike Gerdts /* Exit now if the list is empty */
497bc36eafdSMike Gerdts
498bc36eafdSMike Gerdts Next = AcpiGbl_ModuleCodeList;
499bc36eafdSMike Gerdts if (!Next)
500bc36eafdSMike Gerdts {
501*35786f68SRobert Mustacchi ACPI_DEBUG_PRINT ((ACPI_DB_INIT_NAMES,
502*35786f68SRobert Mustacchi "Legacy MLC block list is empty\n"));
503*35786f68SRobert Mustacchi
504bc36eafdSMike Gerdts return_VOID;
505bc36eafdSMike Gerdts }
506bc36eafdSMike Gerdts
507bc36eafdSMike Gerdts /* Allocate the evaluation information block */
508bc36eafdSMike Gerdts
509bc36eafdSMike Gerdts Info = ACPI_ALLOCATE (sizeof (ACPI_EVALUATE_INFO));
510bc36eafdSMike Gerdts if (!Info)
511bc36eafdSMike Gerdts {
512bc36eafdSMike Gerdts return_VOID;
513bc36eafdSMike Gerdts }
514bc36eafdSMike Gerdts
515bc36eafdSMike Gerdts /* Walk the list, executing each "method" */
516bc36eafdSMike Gerdts
517bc36eafdSMike Gerdts while (Next)
518bc36eafdSMike Gerdts {
519bc36eafdSMike Gerdts Prev = Next;
520bc36eafdSMike Gerdts Next = Next->Method.Mutex;
521bc36eafdSMike Gerdts
522bc36eafdSMike Gerdts /* Clear the link field and execute the method */
523bc36eafdSMike Gerdts
524bc36eafdSMike Gerdts Prev->Method.Mutex = NULL;
525bc36eafdSMike Gerdts AcpiNsExecModuleCode (Prev, Info);
526bc36eafdSMike Gerdts MethodCount++;
527bc36eafdSMike Gerdts
528bc36eafdSMike Gerdts /* Delete the (temporary) method object */
529bc36eafdSMike Gerdts
530bc36eafdSMike Gerdts AcpiUtRemoveReference (Prev);
531bc36eafdSMike Gerdts }
532bc36eafdSMike Gerdts
533bc36eafdSMike Gerdts ACPI_INFO ((
534bc36eafdSMike Gerdts "Executed %u blocks of module-level executable AML code",
535bc36eafdSMike Gerdts MethodCount));
536bc36eafdSMike Gerdts
537bc36eafdSMike Gerdts ACPI_FREE (Info);
538bc36eafdSMike Gerdts AcpiGbl_ModuleCodeList = NULL;
539bc36eafdSMike Gerdts return_VOID;
540bc36eafdSMike Gerdts }
541bc36eafdSMike Gerdts
542bc36eafdSMike Gerdts
543bc36eafdSMike Gerdts /*******************************************************************************
544bc36eafdSMike Gerdts *
545bc36eafdSMike Gerdts * FUNCTION: AcpiNsExecModuleCode
546bc36eafdSMike Gerdts *
547bc36eafdSMike Gerdts * PARAMETERS: MethodObj - Object container for the module-level code
548bc36eafdSMike Gerdts * Info - Info block for method evaluation
549bc36eafdSMike Gerdts *
550bc36eafdSMike Gerdts * RETURN: None. Exceptions during method execution are ignored, since
551bc36eafdSMike Gerdts * we cannot abort a table load.
552bc36eafdSMike Gerdts *
553bc36eafdSMike Gerdts * DESCRIPTION: Execute a control method containing a block of module-level
554bc36eafdSMike Gerdts * executable AML code. The control method is temporarily
555bc36eafdSMike Gerdts * installed to the root node, then evaluated.
556bc36eafdSMike Gerdts *
557bc36eafdSMike Gerdts ******************************************************************************/
558bc36eafdSMike Gerdts
559bc36eafdSMike Gerdts static void
AcpiNsExecModuleCode(ACPI_OPERAND_OBJECT * MethodObj,ACPI_EVALUATE_INFO * Info)560bc36eafdSMike Gerdts AcpiNsExecModuleCode (
561bc36eafdSMike Gerdts ACPI_OPERAND_OBJECT *MethodObj,
562bc36eafdSMike Gerdts ACPI_EVALUATE_INFO *Info)
563bc36eafdSMike Gerdts {
564bc36eafdSMike Gerdts ACPI_OPERAND_OBJECT *ParentObj;
565bc36eafdSMike Gerdts ACPI_NAMESPACE_NODE *ParentNode;
566bc36eafdSMike Gerdts ACPI_OBJECT_TYPE Type;
567bc36eafdSMike Gerdts ACPI_STATUS Status;
568bc36eafdSMike Gerdts
569bc36eafdSMike Gerdts
570bc36eafdSMike Gerdts ACPI_FUNCTION_TRACE (NsExecModuleCode);
571bc36eafdSMike Gerdts
572bc36eafdSMike Gerdts
573bc36eafdSMike Gerdts /*
574bc36eafdSMike Gerdts * Get the parent node. We cheat by using the NextObject field
575bc36eafdSMike Gerdts * of the method object descriptor.
576bc36eafdSMike Gerdts */
577bc36eafdSMike Gerdts ParentNode = ACPI_CAST_PTR (
578bc36eafdSMike Gerdts ACPI_NAMESPACE_NODE, MethodObj->Method.NextObject);
579bc36eafdSMike Gerdts Type = AcpiNsGetType (ParentNode);
580bc36eafdSMike Gerdts
581bc36eafdSMike Gerdts /*
582bc36eafdSMike Gerdts * Get the region handler and save it in the method object. We may need
583bc36eafdSMike Gerdts * this if an operation region declaration causes a _REG method to be run.
584bc36eafdSMike Gerdts *
585bc36eafdSMike Gerdts * We can't do this in AcpiPsLinkModuleCode because
586bc36eafdSMike Gerdts * AcpiGbl_RootNode->Object is NULL at PASS1.
587bc36eafdSMike Gerdts */
588bc36eafdSMike Gerdts if ((Type == ACPI_TYPE_DEVICE) && ParentNode->Object)
589bc36eafdSMike Gerdts {
590bc36eafdSMike Gerdts MethodObj->Method.Dispatch.Handler =
591bc36eafdSMike Gerdts ParentNode->Object->Device.Handler;
592bc36eafdSMike Gerdts }
593bc36eafdSMike Gerdts
594bc36eafdSMike Gerdts /* Must clear NextObject (AcpiNsAttachObject needs the field) */
595bc36eafdSMike Gerdts
596bc36eafdSMike Gerdts MethodObj->Method.NextObject = NULL;
597bc36eafdSMike Gerdts
598bc36eafdSMike Gerdts /* Initialize the evaluation information block */
599bc36eafdSMike Gerdts
600bc36eafdSMike Gerdts memset (Info, 0, sizeof (ACPI_EVALUATE_INFO));
601bc36eafdSMike Gerdts Info->PrefixNode = ParentNode;
602bc36eafdSMike Gerdts
603bc36eafdSMike Gerdts /*
604bc36eafdSMike Gerdts * Get the currently attached parent object. Add a reference,
605bc36eafdSMike Gerdts * because the ref count will be decreased when the method object
606bc36eafdSMike Gerdts * is installed to the parent node.
607bc36eafdSMike Gerdts */
608bc36eafdSMike Gerdts ParentObj = AcpiNsGetAttachedObject (ParentNode);
609bc36eafdSMike Gerdts if (ParentObj)
610bc36eafdSMike Gerdts {
611bc36eafdSMike Gerdts AcpiUtAddReference (ParentObj);
612bc36eafdSMike Gerdts }
613bc36eafdSMike Gerdts
614bc36eafdSMike Gerdts /* Install the method (module-level code) in the parent node */
615bc36eafdSMike Gerdts
616bc36eafdSMike Gerdts Status = AcpiNsAttachObject (ParentNode, MethodObj, ACPI_TYPE_METHOD);
617bc36eafdSMike Gerdts if (ACPI_FAILURE (Status))
618bc36eafdSMike Gerdts {
619bc36eafdSMike Gerdts goto Exit;
620bc36eafdSMike Gerdts }
621bc36eafdSMike Gerdts
622bc36eafdSMike Gerdts /* Execute the parent node as a control method */
623bc36eafdSMike Gerdts
624bc36eafdSMike Gerdts Status = AcpiNsEvaluate (Info);
625bc36eafdSMike Gerdts
626bc36eafdSMike Gerdts ACPI_DEBUG_PRINT ((ACPI_DB_INIT_NAMES,
627bc36eafdSMike Gerdts "Executed module-level code at %p\n",
628bc36eafdSMike Gerdts MethodObj->Method.AmlStart));
629bc36eafdSMike Gerdts
630bc36eafdSMike Gerdts /* Delete a possible implicit return value (in slack mode) */
631bc36eafdSMike Gerdts
632bc36eafdSMike Gerdts if (Info->ReturnObject)
633bc36eafdSMike Gerdts {
634bc36eafdSMike Gerdts AcpiUtRemoveReference (Info->ReturnObject);
635bc36eafdSMike Gerdts }
636bc36eafdSMike Gerdts
637bc36eafdSMike Gerdts /* Detach the temporary method object */
638bc36eafdSMike Gerdts
639bc36eafdSMike Gerdts AcpiNsDetachObject (ParentNode);
640bc36eafdSMike Gerdts
641bc36eafdSMike Gerdts /* Restore the original parent object */
642bc36eafdSMike Gerdts
643bc36eafdSMike Gerdts if (ParentObj)
644bc36eafdSMike Gerdts {
645bc36eafdSMike Gerdts Status = AcpiNsAttachObject (ParentNode, ParentObj, Type);
646bc36eafdSMike Gerdts }
647bc36eafdSMike Gerdts else
648bc36eafdSMike Gerdts {
649bc36eafdSMike Gerdts ParentNode->Type = (UINT8) Type;
650bc36eafdSMike Gerdts }
651bc36eafdSMike Gerdts
652bc36eafdSMike Gerdts Exit:
653bc36eafdSMike Gerdts if (ParentObj)
654bc36eafdSMike Gerdts {
655bc36eafdSMike Gerdts AcpiUtRemoveReference (ParentObj);
656bc36eafdSMike Gerdts }
657bc36eafdSMike Gerdts return_VOID;
658bc36eafdSMike Gerdts }
659