1 /******************************************************************************
2 *
3 * Module Name: dmdeferred - Disassembly of deferred AML opcodes
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, 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 MERCHANTIBILITY 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
45 #include "acpi.h"
46 #include "accommon.h"
47 #include "acdispat.h"
48 #include "amlcode.h"
49 #include "acdisasm.h"
50 #include "acparser.h"
51
52 #define _COMPONENT ACPI_CA_DISASSEMBLER
53 ACPI_MODULE_NAME ("dmdeferred")
54
55
56 /* Local prototypes */
57
58 static ACPI_STATUS
59 AcpiDmDeferredParse (
60 ACPI_PARSE_OBJECT *Op,
61 UINT8 *Aml,
62 UINT32 AmlLength);
63
64
65 /******************************************************************************
66 *
67 * FUNCTION: AcpiDmParseDeferredOps
68 *
69 * PARAMETERS: Root - Root of the parse tree
70 *
71 * RETURN: Status
72 *
73 * DESCRIPTION: Parse the deferred opcodes (Methods, regions, etc.)
74 *
75 *****************************************************************************/
76
77 ACPI_STATUS
78 AcpiDmParseDeferredOps (
79 ACPI_PARSE_OBJECT *Root)
80 {
81 const ACPI_OPCODE_INFO *OpInfo;
82 ACPI_PARSE_OBJECT *Op = Root;
83 ACPI_STATUS Status;
84
85
86 ACPI_FUNCTION_ENTRY ();
87
88
89 /* Traverse the entire parse tree */
90
91 while (Op)
92 {
93 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
94 if (!(OpInfo->Flags & AML_DEFER))
95 {
96 Op = AcpiPsGetDepthNext (Root, Op);
97 continue;
98 }
99
100 /* Now we know we have a deferred opcode */
101
102 switch (Op->Common.AmlOpcode)
103 {
104 case AML_METHOD_OP:
105 case AML_BUFFER_OP:
106 case AML_PACKAGE_OP:
107 case AML_VAR_PACKAGE_OP:
108
109 Status = AcpiDmDeferredParse (Op, Op->Named.Data, Op->Named.Length);
110 if (ACPI_FAILURE (Status))
111 {
112 return (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 (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
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 UINT32 BaseAmlOffset;
170 ACPI_PARSE_OBJECT *NewRootOp;
171 ACPI_PARSE_OBJECT *ExtraOp;
172
173
174 ACPI_FUNCTION_TRACE (DmDeferredParse);
175
176
177 if (!Aml || !AmlLength)
178 {
179 return_ACPI_STATUS (AE_OK);
180 }
181
182 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Parsing deferred opcode %s [%4.4s]\n",
183 Op->Common.AmlOpName, (char *) &Op->Named.Name));
184
185 /* Need a new walk state to parse the AML */
186
187 WalkState = AcpiDsCreateWalkState (0, Op, NULL, NULL);
188 if (!WalkState)
189 {
190 return_ACPI_STATUS (AE_NO_MEMORY);
191 }
192
193 Status = AcpiDsInitAmlWalk (WalkState, Op, NULL, Aml,
194 AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
195 if (ACPI_FAILURE (Status))
196 {
197 return_ACPI_STATUS (Status);
198 }
199
200 /* Parse the AML for this deferred opcode */
201
202 WalkState->ParseFlags &= ~ACPI_PARSE_DELETE_TREE;
203 WalkState->ParseFlags |= ACPI_PARSE_DISASSEMBLE;
204 Status = AcpiPsParseAml (WalkState);
205
206 /*
207 * We need to update all of the AML offsets, since the parser thought
208 * that the method began at offset zero. In reality, it began somewhere
209 * within the ACPI table, at the BaseAmlOffset. Walk the entire tree that
210 * was just created and update the AmlOffset in each Op.
211 */
212 BaseAmlOffset = (Op->Common.Value.Arg)->Common.AmlOffset + 1;
213 StartOp = (Op->Common.Value.Arg)->Common.Next;
214 SearchOp = StartOp;
215
216 while (SearchOp)
217 {
218 SearchOp->Common.AmlOffset += BaseAmlOffset;
219 SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
220 }
221
222 /*
223 * For Buffer and Package opcodes, link the newly parsed subtree
224 * into the main parse tree
225 */
226 switch (Op->Common.AmlOpcode)
227 {
228 case AML_BUFFER_OP:
229 case AML_PACKAGE_OP:
230 case AML_VAR_PACKAGE_OP:
231
232 switch (Op->Common.AmlOpcode)
233 {
234 case AML_PACKAGE_OP:
235
236 ExtraOp = Op->Common.Value.Arg;
237 NewRootOp = ExtraOp->Common.Next;
238 ACPI_FREE (ExtraOp);
239 break;
240
241 case AML_VAR_PACKAGE_OP:
242 case AML_BUFFER_OP:
243 default:
244
245 NewRootOp = Op->Common.Value.Arg;
246 break;
247 }
248
249 Op->Common.Value.Arg = NewRootOp->Common.Value.Arg;
250
251 /* Must point all parents to the main tree */
252
253 StartOp = Op;
254 SearchOp = StartOp;
255 while (SearchOp)
256 {
257 if (SearchOp->Common.Parent == NewRootOp)
258 {
259 SearchOp->Common.Parent = Op;
260 }
261
262 SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
263 }
264
265 ACPI_FREE (NewRootOp);
266 break;
267
268 default:
269
270 break;
271 }
272
273 return_ACPI_STATUS (AE_OK);
274 }