freeldr/freeldr/arch/i386/hwacpi.c

   1 /*
   2  *  FreeLoader
   3  *
   4  *  Copyright (C) 2004  Eric Kohl
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #include <freeldr.h>
  22 #include <arch.h>
  23 #include <rtl.h>
  24 #include <debug.h>
  25 #include <mm.h>
  26 #include <portio.h>
  27
  28 #include "../../reactos/registry.h"
  29 #include "hardware.h"
  30
  31
  32 static BOOL
  33 FindAcpiBios(VOID)
  34 {
  35   PU8 Ptr;
  36
  37   /* Find the 'Root System Descriptor Table Pointer' */
  38   Ptr = (PU8)0xE0000;
  39   while ((U32)Ptr < 0x100000)
  40     {
  41       if (!memcmp(Ptr, "RSD PTR ", 8))
  42         {
  43           DbgPrint((DPRINT_HWDETECT, "ACPI supported\n"));
  44
  45           return TRUE;
  46         }
  47
  48       Ptr = (PU8)((U32)Ptr + 0x10);
  49     }
  50
  51   DbgPrint((DPRINT_HWDETECT, "ACPI not supported\n"));
  52
  53   return FALSE;
  54 }
  55
  56
  57 VOID
  58 DetectAcpiBios(HKEY SystemKey, U32 *BusNumber)
  59 {
  60   char Buffer[80];
  61   HKEY BiosKey;
  62   S32 Error;
  63
  64   if (FindAcpiBios())
  65     {
  66       /* Create new bus key */
  67       sprintf(Buffer,
  68               "MultifunctionAdapter\\%u", *BusNumber);
  69       Error = RegCreateKey(SystemKey,
  70                            Buffer,
  71                            &BiosKey);
  72       if (Error != ERROR_SUCCESS)
  73         {
  74           DbgPrint((DPRINT_HWDETECT, "RegCreateKey() failed (Error %u)\n", (int)Error));
  75           return;
  76         }
  77
  78 #if 0
  79       /* Set 'Component Information' */
  80       SetComponentInformation(BiosKey,
  81                               0x0,
  82                               0x0,
  83                               0xFFFFFFFF);
  84 #endif
  85
  86       /* Increment bus number */
  87       (*BusNumber)++;
  88
  89       /* Set 'Identifier' value */
  90       Error = RegSetValue(BiosKey,
  91                           "Identifier",
  92                           REG_SZ,
  93                           (PU8)"ACPI BIOS",
  94                           10);
  95       if (Error != ERROR_SUCCESS)
  96         {
  97           DbgPrint((DPRINT_HWDETECT, "RegSetValue() failed (Error %u)\n", (int)Error));
  98           return;
  99         }
 100
 101     }
 102 }
 103
 104 /* EOF */