sys/external/intel-public/acpica/dist/os_specific/service_layers/oswintbl.c

   1 /******************************************************************************
   2  *
   3  * Module Name: oswintbl - Windows OSL for obtaining ACPI tables
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
  12  * All rights reserved.
  13  *
  14  * 2. License
  15  *
  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
  19  * property rights.
  20  *
  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
  27  *
  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;
  36  *
  37  * The above copyright and patent license is granted only if the following
  38  * conditions are met:
  39  *
  40  * 3. Conditions
  41  *
  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.
  53  *
  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
  64  * make.
  65  *
  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
  70  * distribution.
  71  *
  72  * 3.4. Intel retains all right, title, and interest in and to the Original
  73  * Intel Code.
  74  *
  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.
  79  *
  80  * 4. Disclaimer and Export Compliance
  81  *
  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
  88  * PARTICULAR PURPOSE.
  89  *
  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
  97  * LIMITED REMEDY.
  98  *
  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.
 113  *
 114  *****************************************************************************/
 115
 116
 117 #ifdef WIN32
 118 #pragma warning(disable:4115)   /* warning C4115: (caused by rpcasync.h) */
 119
 120 #include <windows.h>
 121 #include <winbase.h>
 122
 123 #elif WIN64
 124 #include <windowsx.h>
 125 #endif
 126
 127 #include "acpi.h"
 128 #include "accommon.h"
 129
 130 #define _COMPONENT          ACPI_OS_SERVICES
 131         ACPI_MODULE_NAME    ("oswintbl")
 132
 133
 134 static char             KeyBuffer[64];
 135
 136
 137 /******************************************************************************
 138  *
 139  * FUNCTION:    OsGetTable
 140  *
 141  * PARAMETERS:  Signature       - ACPI Signature for desired table. must be
 142  *                                  a null terminated string.
 143  *
 144  * RETURN:      Pointer to the table. NULL if failure.
 145  *
 146  * DESCRIPTION: Get an ACPI table from the Windows registry.
 147  *
 148  *****************************************************************************/
 149
 150 ACPI_TABLE_HEADER *
 151 OsGetTable (
 152     char                *Signature)
 153 {
 154     HKEY                Handle = NULL;
 155     ULONG               i;
 156     LONG                Status;
 157     ULONG               Type;
 158     ULONG               NameSize;
 159     ULONG               DataSize;
 160     HKEY                SubKey;
 161     ACPI_TABLE_HEADER   *ReturnTable;
 162
 163
 164     /* Get a handle to the table key */
 165
 166     while (1)
 167     {
 168         ACPI_STRCPY (KeyBuffer, "HARDWARE\\ACPI\\");
 169         ACPI_STRCAT (KeyBuffer, Signature);
 170
 171         Status = RegOpenKeyEx (HKEY_LOCAL_MACHINE, KeyBuffer,
 172                     0L, KEY_ALL_ACCESS, &Handle);
 173
 174         if (Status != ERROR_SUCCESS)
 175         {
 176             /*
 177              * Somewhere along the way, MS changed the registry entry for
 178              * the FADT from
 179              * HARDWARE/ACPI/FACP  to
 180              * HARDWARE/ACPI/FADT.
 181              *
 182              * This code allows for both.
 183              */
 184             if (ACPI_COMPARE_NAME (Signature, "FACP"))
 185             {
 186                 Signature = "FADT";
 187             }
 188             else
 189             {
 190                 AcpiOsPrintf ("Could not find %s in registry at %s\n",
 191                     Signature, KeyBuffer);
 192                 return (NULL);
 193             }
 194         }
 195         else
 196         {
 197             break;
 198         }
 199     }
 200
 201     /* Actual data for table is down a couple levels */
 202
 203     for (i = 0; ;)
 204     {
 205         Status = RegEnumKey (Handle, i, KeyBuffer, sizeof (KeyBuffer));
 206         i += 1;
 207         if (Status == ERROR_NO_MORE_ITEMS)
 208         {
 209             break;
 210         }
 211
 212         Status = RegOpenKey (Handle, KeyBuffer, &SubKey);
 213         if (Status != ERROR_SUCCESS)
 214         {
 215             AcpiOsPrintf ("Could not open %s entry\n", Signature);
 216             return (NULL);
 217         }
 218
 219         RegCloseKey (Handle);
 220         Handle = SubKey;
 221         i = 0;
 222     }
 223
 224     /* Find the (binary) table entry */
 225
 226     for (i = 0; ;)
 227     {
 228         NameSize = sizeof (KeyBuffer);
 229         Status = RegEnumValue (Handle, i, KeyBuffer, &NameSize,
 230                     NULL, &Type, NULL, 0);
 231         if (Status != ERROR_SUCCESS)
 232         {
 233             AcpiOsPrintf ("Could not get %s registry entry\n", Signature);
 234             return (NULL);
 235         }
 236
 237         if (Type == REG_BINARY)
 238         {
 239             break;
 240         }
 241         i += 1;
 242     }
 243
 244     /* Get the size of the table */
 245
 246     Status = RegQueryValueEx (Handle, KeyBuffer, NULL, NULL, NULL, &DataSize);
 247     if (Status != ERROR_SUCCESS)
 248     {
 249         AcpiOsPrintf ("Could not read the %s table size\n", Signature);
 250         return (NULL);
 251     }
 252
 253     /* Allocate a new buffer for the table */
 254
 255     ReturnTable = AcpiOsAllocate (DataSize);
 256     if (!ReturnTable)
 257     {
 258         goto Cleanup;
 259     }
 260
 261     /* Get the actual table from the registry */
 262
 263     Status = RegQueryValueEx (Handle, KeyBuffer, NULL, NULL,
 264                 (UCHAR *) ReturnTable, &DataSize);
 265     if (Status != ERROR_SUCCESS)
 266     {
 267         AcpiOsPrintf ("Could not read %s data\n", Signature);
 268         AcpiOsFree (ReturnTable);
 269         return (NULL);
 270     }
 271
 272 Cleanup:
 273     RegCloseKey (Handle);
 274     return (ReturnTable);
 275 }
 276