dmdeferred.c revision 306536 
1/******************************************************************************
2 *
3 * Module Name: dmdeferred - Disassembly of deferred AML opcodes
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, 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#include <contrib/dev/acpica/include/acpi.h>
45#include <contrib/dev/acpica/include/accommon.h>
46#include <contrib/dev/acpica/include/acdispat.h>
47#include <contrib/dev/acpica/include/amlcode.h>
48#include <contrib/dev/acpica/include/acdisasm.h>
49#include <contrib/dev/acpica/include/acparser.h>
50
51#define _COMPONENT          ACPI_CA_DISASSEMBLER
52        ACPI_MODULE_NAME    ("dmdeferred")
53
54
55/* Local prototypes */
56
57static ACPI_STATUS
58AcpiDmDeferredParse (
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
76ACPI_STATUS
77AcpiDmParseDeferredOps (
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_ENTRY ();
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_VAR_PACKAGE_OP:
107
108            Status = AcpiDmDeferredParse (
109                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
159static ACPI_STATUS
160AcpiDmDeferredParse (
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
205    StartOp = (Op->Common.Value.Arg)->Common.Next;
206    SearchOp = StartOp;
207    while (SearchOp)
208    {
209        SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
210    }
211
212    /*
213     * For Buffer and Package opcodes, link the newly parsed subtree
214     * into the main parse tree
215     */
216    switch (Op->Common.AmlOpcode)
217    {
218    case AML_BUFFER_OP:
219    case AML_PACKAGE_OP:
220    case AML_VAR_PACKAGE_OP:
221
222        switch (Op->Common.AmlOpcode)
223        {
224        case AML_PACKAGE_OP:
225
226            ExtraOp = Op->Common.Value.Arg;
227            NewRootOp = ExtraOp->Common.Next;
228            ACPI_FREE (ExtraOp);
229            break;
230
231        case AML_VAR_PACKAGE_OP:
232        case AML_BUFFER_OP:
233        default:
234
235            NewRootOp = Op->Common.Value.Arg;
236            break;
237        }
238
239        Op->Common.Value.Arg = NewRootOp->Common.Value.Arg;
240
241        /* Must point all parents to the main tree */
242
243        StartOp = Op;
244        SearchOp = StartOp;
245        while (SearchOp)
246        {
247            if (SearchOp->Common.Parent == NewRootOp)
248            {
249                SearchOp->Common.Parent = Op;
250            }
251
252            SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
253        }
254
255        ACPI_FREE (NewRootOp);
256        break;
257
258    default:
259
260        break;
261    }
262
263    return_ACPI_STATUS (AE_OK);
264}
265