boot/freeldr/freeldr/arch/i386/hwapm.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 along
  17  *  with this program; if not, write to the Free Software Foundation, Inc.,
  18  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include <freeldr.h>
  22
  23 #include <debug.h>
  24
  25 DBG_DEFAULT_CHANNEL(HWDETECT);
  26
  27 static BOOLEAN
  28 FindApmBios(VOID)
  29 {
  30   REGS  RegsIn;
  31   REGS  RegsOut;
  32
  33   RegsIn.b.ah = 0x53;
  34   RegsIn.b.al = 0x00;
  35   RegsIn.w.bx = 0x0000;
  36
  37   Int386(0x15, &RegsIn, &RegsOut);
  38
  39   if (INT386_SUCCESS(RegsOut))
  40     {
  41       TRACE("Found APM BIOS\n");
  42       TRACE("AH: %x\n", RegsOut.b.ah);
  43       TRACE("AL: %x\n", RegsOut.b.al);
  44       TRACE("BH: %x\n", RegsOut.b.bh);
  45       TRACE("BL: %x\n", RegsOut.b.bl);
  46       TRACE("CX: %x\n", RegsOut.w.cx);
  47
  48       return TRUE;
  49     }
  50
  51   TRACE("No APM BIOS found\n");
  52
  53   return FALSE;
  54 }
  55
  56
  57 VOID
  58 DetectApmBios(PCONFIGURATION_COMPONENT_DATA SystemKey, ULONG *BusNumber)
  59 {
  60     PCONFIGURATION_COMPONENT_DATA BiosKey;
  61     PCM_PARTIAL_RESOURCE_LIST PartialResourceList;
  62     ULONG Size;
  63
  64     Size = sizeof(CM_PARTIAL_RESOURCE_LIST) -
  65            sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR);
  66
  67     if (FindApmBios())
  68     {
  69         /* Create 'Configuration Data' value */
  70         PartialResourceList = FrLdrHeapAlloc(Size, TAG_HW_RESOURCE_LIST);
  71         memset(PartialResourceList, 0, Size);
  72         PartialResourceList->Version = 0;
  73         PartialResourceList->Revision = 0;
  74         PartialResourceList->Count = 0;
  75
  76         /* Create new bus key */
  77         FldrCreateComponentKey(SystemKey,
  78                                AdapterClass,
  79                                MultiFunctionAdapter,
  80                                0x0,
  81                                0x0,
  82                                0xFFFFFFFF,
  83                                "APM",
  84                                PartialResourceList,
  85                                Size,
  86                                &BiosKey);
  87
  88         /* Increment bus number */
  89         (*BusNumber)++;
  90     }
  91
  92     /* FIXME: Add configuration data */
  93 }
  94
  95 /* EOF */