xref: /illumos-gate/usr/src/cmd/acpi/iasl/aslprune.c (revision 35786f6866ae52207d0f1a25fe7ca5f652f32ce0)
1 /******************************************************************************
2  *
3  * Module Name: aslprune - Parse tree prune utility
4  *
5  *****************************************************************************/
6 
7 /******************************************************************************
8  *
9  * 1. Copyright Notice
10  *
11  * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12  * All rights reserved.
13  *
14  * 2. License
15  *
16  * 2.1. This is your license from Intel Corp. under its intellectual property
17  * rights. You may have additional license terms from the party that provided
18  * you this software, covering your right to use that party's intellectual
19  * property rights.
20  *
21  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22  * copy of the source code appearing in this file ("Covered Code") an
23  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24  * base code distributed originally by Intel ("Original Intel Code") to copy,
25  * make derivatives, distribute, use and display any portion of the Covered
26  * Code in any form, with the right to sublicense such rights; and
27  *
28  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29  * license (with the right to sublicense), under only those claims of Intel
30  * patents that are infringed by the Original Intel Code, to make, use, sell,
31  * offer to sell, and import the Covered Code and derivative works thereof
32  * solely to the minimum extent necessary to exercise the above copyright
33  * license, and in no event shall the patent license extend to any additions
34  * to or modifications of the Original Intel Code. No other license or right
35  * is granted directly or by implication, estoppel or otherwise;
36  *
37  * The above copyright and patent license is granted only if the following
38  * conditions are met:
39  *
40  * 3. Conditions
41  *
42  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43  * Redistribution of source code of any substantial portion of the Covered
44  * Code or modification with rights to further distribute source must include
45  * the above Copyright Notice, the above License, this list of Conditions,
46  * and the following Disclaimer and Export Compliance provision. In addition,
47  * Licensee must cause all Covered Code to which Licensee contributes to
48  * contain a file documenting the changes Licensee made to create that Covered
49  * Code and the date of any change. Licensee must include in that file the
50  * documentation of any changes made by any predecessor Licensee. Licensee
51  * must include a prominent statement that the modification is derived,
52  * directly or indirectly, from Original Intel Code.
53  *
54  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55  * Redistribution of source code of any substantial portion of the Covered
56  * Code or modification without rights to further distribute source must
57  * include the following Disclaimer and Export Compliance provision in the
58  * documentation and/or other materials provided with distribution. In
59  * addition, Licensee may not authorize further sublicense of source of any
60  * portion of the Covered Code, and must include terms to the effect that the
61  * license from Licensee to its licensee is limited to the intellectual
62  * property embodied in the software Licensee provides to its licensee, and
63  * not to intellectual property embodied in modifications its licensee may
64  * make.
65  *
66  * 3.3. Redistribution of Executable. Redistribution in executable form of any
67  * substantial portion of the Covered Code or modification must reproduce the
68  * above Copyright Notice, and the following Disclaimer and Export Compliance
69  * provision in the documentation and/or other materials provided with the
70  * distribution.
71  *
72  * 3.4. Intel retains all right, title, and interest in and to the Original
73  * Intel Code.
74  *
75  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76  * Intel shall be used in advertising or otherwise to promote the sale, use or
77  * other dealings in products derived from or relating to the Covered Code
78  * without prior written authorization from Intel.
79  *
80  * 4. Disclaimer and Export Compliance
81  *
82  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88  * PARTICULAR PURPOSE.
89  *
90  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97  * LIMITED REMEDY.
98  *
99  * 4.3. Licensee shall not export, either directly or indirectly, any of this
100  * software or system incorporating such software without first obtaining any
101  * required license or other approval from the U. S. Department of Commerce or
102  * any other agency or department of the United States Government. In the
103  * event Licensee exports any such software from the United States or
104  * re-exports any such software from a foreign destination, Licensee shall
105  * ensure that the distribution and export/re-export of the software is in
106  * compliance with all laws, regulations, orders, or other restrictions of the
107  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108  * any of its subsidiaries will export/re-export any technical data, process,
109  * software, or service, directly or indirectly, to any country for which the
110  * United States government or any agency thereof requires an export license,
111  * other governmental approval, or letter of assurance, without first obtaining
112  * such license, approval or letter.
113  *
114  *****************************************************************************
115  *
116  * Alternatively, you may choose to be licensed under the terms of the
117  * following license:
118  *
119  * Redistribution and use in source and binary forms, with or without
120  * modification, are permitted provided that the following conditions
121  * are met:
122  * 1. Redistributions of source code must retain the above copyright
123  *    notice, this list of conditions, and the following disclaimer,
124  *    without modification.
125  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126  *    substantially similar to the "NO WARRANTY" disclaimer below
127  *    ("Disclaimer") and any redistribution must be conditioned upon
128  *    including a substantially similar Disclaimer requirement for further
129  *    binary redistribution.
130  * 3. Neither the names of the above-listed copyright holders nor the names
131  *    of any contributors may be used to endorse or promote products derived
132  *    from this software without specific prior written permission.
133  *
134  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145  *
146  * Alternatively, you may choose to be licensed under the terms of the
147  * GNU General Public License ("GPL") version 2 as published by the Free
148  * Software Foundation.
149  *
150  *****************************************************************************/
151 
152 #include "aslcompiler.h"
153 #include "aslcompiler.y.h"
154 #include "acapps.h"
155 
156 #define _COMPONENT          ACPI_COMPILER
157         ACPI_MODULE_NAME    ("aslprune")
158 
159 
160 /* Local prototypes */
161 
162 static ACPI_STATUS
163 PrTreePruneWalk (
164     ACPI_PARSE_OBJECT       *Op,
165     UINT32                  Level,
166     void                    *Context);
167 
168 static void
169 PrPrintObjectAtLevel (
170     UINT32                  Level,
171     const char              *ObjectName);
172 
173 
174 /* Structure used for the pruning parse tree walk */
175 
176 typedef struct acpi_prune_info
177 {
178     UINT32                  PruneLevel;
179     UINT16                  ParseOpcode;
180     UINT16                  Count;
181 
182 } ACPI_PRUNE_INFO;
183 
184 
185 /*******************************************************************************
186  *
187  * FUNCTION:    AslPruneParseTree
188  *
189  * PARAMETERS:  PruneDepth              - Number of levels to prune
190  *              Type                    - Prune type (Device, Method, etc.)
191  *
192  * RETURN:      None
193  *
194  * DESCRIPTION: Prune off one or more levels of the ASL parse tree
195  *
196  ******************************************************************************/
197 
198 void
AslPruneParseTree(UINT32 PruneDepth,UINT32 Type)199 AslPruneParseTree (
200     UINT32                  PruneDepth,
201     UINT32                  Type)
202 {
203     ACPI_PRUNE_INFO         PruneObj;
204 
205 
206     PruneObj.PruneLevel = PruneDepth;
207     PruneObj.Count = 0;
208 
209     switch (Type)
210     {
211     case 0:
212         PruneObj.ParseOpcode = (UINT16) PARSEOP_DEVICE;
213         break;
214 
215     case 1:
216         PruneObj.ParseOpcode = (UINT16) PARSEOP_METHOD;
217         break;
218 
219     case 2:
220         PruneObj.ParseOpcode = (UINT16) PARSEOP_IF;
221         break;
222 
223     default:
224         AcpiOsPrintf ("Unsupported type: %u\n", Type);
225         return;
226     }
227 
228     AcpiOsPrintf ("Pruning parse tree, from depth %u\n",
229         PruneDepth);
230 
231     AcpiOsPrintf ("\nRemoving Objects:\n");
232 
233     TrWalkParseTree (Gbl_ParseTreeRoot, ASL_WALK_VISIT_DOWNWARD,
234         PrTreePruneWalk, NULL, ACPI_CAST_PTR (void, &PruneObj));
235 
236     AcpiOsPrintf ("\n%u Total Objects Removed\n", PruneObj.Count);
237 }
238 
239 
240 /*******************************************************************************
241  *
242  * FUNCTION:    PrPrintObjectAtLevel
243  *
244  * PARAMETERS:  Level                   - Current nesting level
245  *              ObjectName              - ACPI name for the object
246  *
247  * RETURN:      None
248  *
249  * DESCRIPTION: Print object name with indent
250  *
251  ******************************************************************************/
252 
253 static void
PrPrintObjectAtLevel(UINT32 Level,const char * ObjectName)254 PrPrintObjectAtLevel (
255     UINT32                  Level,
256     const char              *ObjectName)
257 {
258     UINT32                  i;
259 
260 
261     for (i = 0; i < Level; i++)
262     {
263         AcpiOsPrintf ("  ");
264     }
265 
266     AcpiOsPrintf ("[%s] at Level [%u]\n", ObjectName, Level);
267 }
268 
269 
270 /*******************************************************************************
271  *
272  * FUNCTION:    PrTreePruneWalk
273  *
274  * PARAMETERS:  Parse tree walk callback
275  *
276  * RETURN:      Status
277  *
278  * DESCRIPTION: Prune off one or more levels of the ASL parse tree
279  *
280  * Current objects that can be pruned are: Devices, Methods, and If/Else
281  * blocks.
282  *
283  ******************************************************************************/
284 
285 static ACPI_STATUS
PrTreePruneWalk(ACPI_PARSE_OBJECT * Op,UINT32 Level,void * Context)286 PrTreePruneWalk (
287     ACPI_PARSE_OBJECT       *Op,
288     UINT32                  Level,
289     void                    *Context)
290 {
291     ACPI_PRUNE_INFO         *PruneObj = (ACPI_PRUNE_INFO *) Context;
292 
293 
294     /* We only care about objects below the Prune Level threshold */
295 
296     if (Level <= PruneObj->PruneLevel)
297     {
298         return (AE_OK);
299     }
300 
301     if ((Op->Asl.ParseOpcode != PruneObj->ParseOpcode) &&
302        !(Op->Asl.ParseOpcode == PARSEOP_ELSE &&
303              PruneObj->ParseOpcode == PARSEOP_IF))
304     {
305         return (AE_OK);
306     }
307 
308     switch (Op->Asl.ParseOpcode)
309     {
310     case PARSEOP_METHOD:
311 
312         AcpiOsPrintf ("Method");
313         PrPrintObjectAtLevel (Level, Op->Asl.Child->Asl.Value.Name);
314         Op->Asl.Child->Asl.Next->Asl.Next->Asl.Next->Asl.Next->Asl.Next->Asl.Next = NULL;
315         PruneObj->Count++;
316         break;
317 
318     case PARSEOP_DEVICE:
319 
320         AcpiOsPrintf ("Device");
321         PrPrintObjectAtLevel (Level, Op->Asl.Child->Asl.Value.Name);
322         Op->Asl.Child->Asl.Next = NULL;
323         PruneObj->Count++;
324         break;
325 
326     case PARSEOP_IF:
327     case PARSEOP_ELSE:
328 
329         if (Op->Asl.ParseOpcode == PARSEOP_ELSE)
330         {
331             PrPrintObjectAtLevel(Level, "Else");
332             Op->Asl.Child = NULL;
333         }
334         else
335         {
336             PrPrintObjectAtLevel(Level, "If");
337             Op->Asl.Child->Asl.Next = NULL;
338         }
339 
340         PruneObj->Count++;
341         break;
342 
343     default:
344 
345         break;
346     }
347 
348     return (AE_OK);
349 }
350