xref: /freebsd/sys/contrib/dev/acpica/components/disassembler/dmdeferred.c (revision ddd5b8e9b4d8957fce018c520657cdfa4ecffad3)
1 /******************************************************************************
2  *
3  * Module Name: dmdeferred - Disassembly of deferred AML opcodes
4  *
5  *****************************************************************************/
6 
7 /*
8  * Copyright (C) 2000 - 2013, 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 <contrib/dev/acpica/include/acpi.h>
46 #include <contrib/dev/acpica/include/accommon.h>
47 #include <contrib/dev/acpica/include/acdispat.h>
48 #include <contrib/dev/acpica/include/amlcode.h>
49 #include <contrib/dev/acpica/include/acdisasm.h>
50 #include <contrib/dev/acpica/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             ACPI_ERROR ((AE_INFO, "Unhandled deferred AML opcode [0x%.4X]",
132                  Op->Common.AmlOpcode));
133             break;
134         }
135 
136         Op = AcpiPsGetDepthNext (Root, Op);
137     }
138 
139     return (AE_OK);
140 }
141 
142 
143 /******************************************************************************
144  *
145  * FUNCTION:    AcpiDmDeferredParse
146  *
147  * PARAMETERS:  Op                  - Root Op of the deferred opcode
148  *              Aml                 - Pointer to the raw AML
149  *              AmlLength           - Length of the AML
150  *
151  * RETURN:      Status
152  *
153  * DESCRIPTION: Parse one deferred opcode
154  *              (Methods, operation regions, etc.)
155  *
156  *****************************************************************************/
157 
158 static ACPI_STATUS
159 AcpiDmDeferredParse (
160     ACPI_PARSE_OBJECT       *Op,
161     UINT8                   *Aml,
162     UINT32                  AmlLength)
163 {
164     ACPI_WALK_STATE         *WalkState;
165     ACPI_STATUS             Status;
166     ACPI_PARSE_OBJECT       *SearchOp;
167     ACPI_PARSE_OBJECT       *StartOp;
168     UINT32                  BaseAmlOffset;
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 
205     /*
206      * We need to update all of the AML offsets, since the parser thought
207      * that the method began at offset zero. In reality, it began somewhere
208      * within the ACPI table, at the BaseAmlOffset. Walk the entire tree that
209      * was just created and update the AmlOffset in each Op.
210      */
211     BaseAmlOffset = (Op->Common.Value.Arg)->Common.AmlOffset + 1;
212     StartOp = (Op->Common.Value.Arg)->Common.Next;
213     SearchOp = StartOp;
214 
215     while (SearchOp)
216     {
217         SearchOp->Common.AmlOffset += BaseAmlOffset;
218         SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
219     }
220 
221     /*
222      * For Buffer and Package opcodes, link the newly parsed subtree
223      * into the main parse tree
224      */
225     switch (Op->Common.AmlOpcode)
226     {
227     case AML_BUFFER_OP:
228     case AML_PACKAGE_OP:
229     case AML_VAR_PACKAGE_OP:
230 
231         switch (Op->Common.AmlOpcode)
232         {
233         case AML_PACKAGE_OP:
234 
235             ExtraOp = Op->Common.Value.Arg;
236             NewRootOp = ExtraOp->Common.Next;
237             ACPI_FREE (ExtraOp);
238             break;
239 
240         case AML_VAR_PACKAGE_OP:
241         case AML_BUFFER_OP:
242         default:
243 
244             NewRootOp = Op->Common.Value.Arg;
245             break;
246         }
247 
248         Op->Common.Value.Arg = NewRootOp->Common.Value.Arg;
249 
250         /* Must point all parents to the main tree */
251 
252         StartOp = Op;
253         SearchOp = StartOp;
254         while (SearchOp)
255         {
256             if (SearchOp->Common.Parent == NewRootOp)
257             {
258                 SearchOp->Common.Parent = Op;
259             }
260 
261             SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
262         }
263 
264         ACPI_FREE (NewRootOp);
265         break;
266 
267     default:
268         break;
269     }
270 
271     return_ACPI_STATUS (AE_OK);
272 }
273