1 /******************************************************************************
3 * Module Name: dtsubtable.c - handling of subtables within ACPI tables
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
12 * All rights reserved.
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
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
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;
37 * The above copyright and patent license is granted only if the following
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.
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
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
72 * 3.4. Intel retains all right, title, and interest in and to the Original
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.
80 * 4. Disclaimer and Export Compliance
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
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
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.
114 *****************************************************************************/
116 #define __DTSUBTABLE_C__
118 #include "aslcompiler.h"
119 #include "dtcompiler.h"
121 #define _COMPONENT DT_COMPILER
122 ACPI_MODULE_NAME ("dtsubtable")
125 /******************************************************************************
127 * FUNCTION: DtCreateSubtable
129 * PARAMETERS: Buffer - Input buffer
130 * Length - Buffer length
131 * RetSubtable - Returned newly created subtable
135 * DESCRIPTION: Create a subtable that is not listed with ACPI_DMTABLE_INFO
136 * For example, FACS has 24 bytes reserved at the end
137 * and it's not listed at AcpiDmTableInfoFacs
139 *****************************************************************************/
145 DT_SUBTABLE **RetSubtable)
147 DT_SUBTABLE *Subtable;
150 Subtable = UtLocalCalloc (sizeof (DT_SUBTABLE));
152 /* Create a new buffer for the subtable data */
154 Subtable->Buffer = UtLocalCalloc (Length);
155 ACPI_MEMCPY (Subtable->Buffer, Buffer, Length);
157 Subtable->Length = Length;
158 Subtable->TotalLength = Length;
160 *RetSubtable = Subtable;
164 /******************************************************************************
166 * FUNCTION: DtInsertSubtable
168 * PARAMETERS: ParentTable - The Parent of the new subtable
169 * Subtable - The new subtable to insert
173 * DESCRIPTION: Insert the new subtable to the parent table
175 *****************************************************************************/
179 DT_SUBTABLE *ParentTable,
180 DT_SUBTABLE *Subtable)
182 DT_SUBTABLE *ChildTable;
185 Subtable->Peer = NULL;
186 Subtable->Parent = ParentTable;
188 /* Link the new entry into the child list */
190 if (!ParentTable->Child)
192 ParentTable->Child = Subtable;
196 /* Walk to the end of the child list */
198 ChildTable = ParentTable->Child;
199 while (ChildTable->Peer)
201 ChildTable = ChildTable->Peer;
204 /* Add new subtable at the end of the child list */
206 ChildTable->Peer = Subtable;
211 /******************************************************************************
213 * FUNCTION: DtPushSubtable
215 * PARAMETERS: Subtable - Subtable to push
219 * DESCRIPTION: Push a subtable onto a subtable stack
221 *****************************************************************************/
225 DT_SUBTABLE *Subtable)
228 Subtable->StackTop = Gbl_SubtableStack;
229 Gbl_SubtableStack = Subtable;
233 /******************************************************************************
235 * FUNCTION: DtPopSubtable
241 * DESCRIPTION: Pop a subtable from a subtable stack. Uses global SubtableStack
243 *****************************************************************************/
249 DT_SUBTABLE *Subtable;
252 Subtable = Gbl_SubtableStack;
256 Gbl_SubtableStack = Subtable->StackTop;
261 /******************************************************************************
263 * FUNCTION: DtPeekSubtable
267 * RETURN: The subtable on top of stack
269 * DESCRIPTION: Get the subtable on top of stack
271 *****************************************************************************/
278 return (Gbl_SubtableStack);
282 /******************************************************************************
284 * FUNCTION: DtGetNextSubtable
286 * PARAMETERS: ParentTable - Parent table whose children we are
288 * ChildTable - Previous child that was found.
289 * The NEXT child will be returned
291 * RETURN: Pointer to the NEXT child or NULL if none is found.
293 * DESCRIPTION: Return the next peer subtable within the tree.
295 *****************************************************************************/
299 DT_SUBTABLE *ParentTable,
300 DT_SUBTABLE *ChildTable)
302 ACPI_FUNCTION_ENTRY ();
307 /* It's really the parent's _scope_ that we want */
309 return (ParentTable->Child);
312 /* Otherwise just return the next peer (NULL if at end-of-list) */
314 return (ChildTable->Peer);
318 /******************************************************************************
320 * FUNCTION: DtGetParentSubtable
322 * PARAMETERS: Subtable - Current subtable
324 * RETURN: Parent of the given subtable
326 * DESCRIPTION: Get the parent of the given subtable in the tree
328 *****************************************************************************/
331 DtGetParentSubtable (
332 DT_SUBTABLE *Subtable)
340 return (Subtable->Parent);
344 /******************************************************************************
346 * FUNCTION: DtGetSubtableLength
348 * PARAMETERS: Field - Current field list pointer
349 * Info - Data table info
351 * RETURN: Subtable length
353 * DESCRIPTION: Get length of bytes needed to compile the subtable
355 *****************************************************************************/
358 DtGetSubtableLength (
360 ACPI_DMTABLE_INFO *Info)
362 UINT32 ByteLength = 0;
365 /* Walk entire Info table; Null name terminates */
367 for (; Info->Name; Info++)
369 ByteLength += DtGetFieldLength (Field, Info);
376 /******************************************************************************
378 * FUNCTION: DtSetSubtableLength
380 * PARAMETERS: Subtable - Subtable
384 * DESCRIPTION: Set length of the subtable into its length field
386 *****************************************************************************/
389 DtSetSubtableLength (
390 DT_SUBTABLE *Subtable)
393 if (!Subtable->LengthField)
398 ACPI_MEMCPY (Subtable->LengthField, &Subtable->TotalLength,
399 Subtable->SizeOfLengthField);