1 /******************************************************************************
2 *
3 * Module Name: dmdeferred - Disassembly of deferred AML opcodes
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2022, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include "acpi.h"
45 #include "accommon.h"
46 #include "acdispat.h"
47 #include "amlcode.h"
48 #include "acdisasm.h"
49 #include "acparser.h"
50
51 #define _COMPONENT ACPI_CA_DISASSEMBLER
52 ACPI_MODULE_NAME ("dmdeferred")
53
54
55 /* Local prototypes */
56
57 static ACPI_STATUS
58 AcpiDmDeferredParse (
59 ACPI_PARSE_OBJECT *Op,
60 UINT8 *Aml,
61 UINT32 AmlLength);
62
63
64 /******************************************************************************
65 *
66 * FUNCTION: AcpiDmParseDeferredOps
67 *
68 * PARAMETERS: Root - Root of the parse tree
69 *
70 * RETURN: Status
71 *
72 * DESCRIPTION: Parse the deferred opcodes (Methods, regions, etc.)
73 *
74 *****************************************************************************/
75
76 ACPI_STATUS
AcpiDmParseDeferredOps(ACPI_PARSE_OBJECT * Root)77 AcpiDmParseDeferredOps (
78 ACPI_PARSE_OBJECT *Root)
79 {
80 const ACPI_OPCODE_INFO *OpInfo;
81 ACPI_PARSE_OBJECT *Op = Root;
82 ACPI_STATUS Status;
83
84
85 ACPI_FUNCTION_TRACE (DmParseDeferredOps);
86
87
88 /* Traverse the entire parse tree */
89
90 while (Op)
91 {
92 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
93 if (!(OpInfo->Flags & AML_DEFER))
94 {
95 Op = AcpiPsGetDepthNext (Root, Op);
96 continue;
97 }
98
99 /* Now we know we have a deferred opcode */
100
101 switch (Op->Common.AmlOpcode)
102 {
103 case AML_METHOD_OP:
104 case AML_BUFFER_OP:
105 case AML_PACKAGE_OP:
106 case AML_VARIABLE_PACKAGE_OP:
107
108 Status = AcpiDmDeferredParse (
109 Op, Op->Named.Data, Op->Named.Length);
110 if (ACPI_FAILURE (Status))
111 {
112 return_ACPI_STATUS (Status);
113 }
114 break;
115
116 /* We don't need to do anything for these deferred opcodes */
117
118 case AML_REGION_OP:
119 case AML_DATA_REGION_OP:
120 case AML_CREATE_QWORD_FIELD_OP:
121 case AML_CREATE_DWORD_FIELD_OP:
122 case AML_CREATE_WORD_FIELD_OP:
123 case AML_CREATE_BYTE_FIELD_OP:
124 case AML_CREATE_BIT_FIELD_OP:
125 case AML_CREATE_FIELD_OP:
126 case AML_BANK_FIELD_OP:
127
128 break;
129
130 default:
131
132 ACPI_ERROR ((AE_INFO, "Unhandled deferred AML opcode [0x%.4X]",
133 Op->Common.AmlOpcode));
134 break;
135 }
136
137 Op = AcpiPsGetDepthNext (Root, Op);
138 }
139
140 return_ACPI_STATUS (AE_OK);
141 }
142
143
144 /******************************************************************************
145 *
146 * FUNCTION: AcpiDmDeferredParse
147 *
148 * PARAMETERS: Op - Root Op of the deferred opcode
149 * Aml - Pointer to the raw AML
150 * AmlLength - Length of the AML
151 *
152 * RETURN: Status
153 *
154 * DESCRIPTION: Parse one deferred opcode
155 * (Methods, operation regions, etc.)
156 *
157 *****************************************************************************/
158
159 static ACPI_STATUS
AcpiDmDeferredParse(ACPI_PARSE_OBJECT * Op,UINT8 * Aml,UINT32 AmlLength)160 AcpiDmDeferredParse (
161 ACPI_PARSE_OBJECT *Op,
162 UINT8 *Aml,
163 UINT32 AmlLength)
164 {
165 ACPI_WALK_STATE *WalkState;
166 ACPI_STATUS Status;
167 ACPI_PARSE_OBJECT *SearchOp;
168 ACPI_PARSE_OBJECT *StartOp;
169 ACPI_PARSE_OBJECT *NewRootOp;
170 ACPI_PARSE_OBJECT *ExtraOp;
171
172
173 ACPI_FUNCTION_TRACE (DmDeferredParse);
174
175
176 if (!Aml || !AmlLength)
177 {
178 return_ACPI_STATUS (AE_OK);
179 }
180
181 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Parsing deferred opcode %s [%4.4s]\n",
182 Op->Common.AmlOpName, (char *) &Op->Named.Name));
183
184 /* Need a new walk state to parse the AML */
185
186 WalkState = AcpiDsCreateWalkState (0, Op, NULL, NULL);
187 if (!WalkState)
188 {
189 return_ACPI_STATUS (AE_NO_MEMORY);
190 }
191
192 Status = AcpiDsInitAmlWalk (WalkState, Op, NULL, Aml,
193 AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
194 if (ACPI_FAILURE (Status))
195 {
196 return_ACPI_STATUS (Status);
197 }
198
199 /* Parse the AML for this deferred opcode */
200
201 WalkState->ParseFlags &= ~ACPI_PARSE_DELETE_TREE;
202 WalkState->ParseFlags |= ACPI_PARSE_DISASSEMBLE;
203 Status = AcpiPsParseAml (WalkState);
204 if (ACPI_FAILURE (Status))
205 {
206 return_ACPI_STATUS(Status);
207 }
208
209 StartOp = (Op->Common.Value.Arg)->Common.Next;
210 SearchOp = StartOp;
211 while (SearchOp)
212 {
213 SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
214 }
215
216 /*
217 * For Buffer and Package opcodes, link the newly parsed subtree
218 * into the main parse tree
219 */
220 switch (Op->Common.AmlOpcode)
221 {
222 case AML_BUFFER_OP:
223 case AML_PACKAGE_OP:
224 case AML_VARIABLE_PACKAGE_OP:
225
226 switch (Op->Common.AmlOpcode)
227 {
228 case AML_PACKAGE_OP:
229
230 ExtraOp = Op->Common.Value.Arg;
231 NewRootOp = ExtraOp->Common.Next;
232 ACPI_FREE (ExtraOp);
233 break;
234
235 case AML_VARIABLE_PACKAGE_OP:
236 case AML_BUFFER_OP:
237 default:
238
239 NewRootOp = Op->Common.Value.Arg;
240 break;
241 }
242
243 Op->Common.Value.Arg = NewRootOp->Common.Value.Arg;
244
245 /* Must point all parents to the main tree */
246
247 StartOp = Op;
248 SearchOp = StartOp;
249 while (SearchOp)
250 {
251 if (SearchOp->Common.Parent == NewRootOp)
252 {
253 SearchOp->Common.Parent = Op;
254 }
255
256 SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
257 }
258
259 ACPI_FREE (NewRootOp);
260 break;
261
262 default:
263
264 break;
265 }
266
267 return_ACPI_STATUS (AE_OK);
268 }
269