reactos/boot/freeldr/freeldr/arch/i386/hwpci.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
  23 #define NDEBUG
  24 #include <debug.h>
  25
  26 typedef struct _ROUTING_SLOT
  27 {
  28   UCHAR  BusNumber;
  29   UCHAR  DeviceNumber;
  30   UCHAR  LinkA;
  31   USHORT BitmapA;
  32   UCHAR  LinkB;
  33   USHORT BitmapB;
  34   UCHAR  LinkC;
  35   USHORT BitmapC;
  36   UCHAR  LinkD;
  37   USHORT BitmapD;
  38   UCHAR  SlotNumber;
  39   UCHAR  Reserved;
  40 } __attribute__((packed)) ROUTING_SLOT, *PROUTING_SLOT;
  41
  42 typedef struct _PCI_IRQ_ROUTING_TABLE
  43 {
  44   ULONG Signature;
  45   USHORT Version;
  46   USHORT Size;
  47   UCHAR  RouterBus;
  48   UCHAR  RouterSlot;
  49   USHORT ExclusiveIRQs;
  50   ULONG CompatibleRouter;
  51   ULONG MiniportData;
  52   UCHAR  Reserved[11];
  53   UCHAR  Checksum;
  54   ROUTING_SLOT Slot[1];
  55 } __attribute__((packed)) PCI_IRQ_ROUTING_TABLE, *PPCI_IRQ_ROUTING_TABLE;
  56
  57 typedef struct _CM_PCI_BUS_DATA
  58 {
  59   UCHAR  BusCount;
  60   USHORT PciVersion;
  61   UCHAR  HardwareMechanism;
  62 } __attribute__((packed)) CM_PCI_BUS_DATA, *PCM_PCI_BUS_DATA;
  63
  64
  65 static PPCI_IRQ_ROUTING_TABLE
  66 GetPciIrqRoutingTable(VOID)
  67 {
  68   PPCI_IRQ_ROUTING_TABLE Table;
  69   PUCHAR Ptr;
  70   ULONG Sum;
  71   ULONG i;
  72
  73   Table = (PPCI_IRQ_ROUTING_TABLE)0xF0000;
  74   while ((ULONG)Table < 0x100000)
  75     {
  76       if (Table->Signature == 0x52495024)
  77         {
  78           DbgPrint((DPRINT_HWDETECT,
  79                     "Found signature\n"));
  80
  81           Ptr = (PUCHAR)Table;
  82           Sum = 0;
  83           for (i = 0; i < Table->Size; i++)
  84             {
  85               Sum += Ptr[i];
  86             }
  87
  88           if ((Sum & 0xFF) != 0)
  89             {
  90               DbgPrint((DPRINT_HWDETECT,
  91                         "Invalid routing table\n"));
  92               return NULL;
  93             }
  94
  95           DbgPrint((DPRINT_HWDETECT,
  96                    "Valid checksum\n"));
  97
  98           return Table;
  99         }
 100
 101       Table = (PPCI_IRQ_ROUTING_TABLE)((ULONG)Table + 0x10);
 102     }
 103
 104   return NULL;
 105 }
 106
 107
 108 static BOOLEAN
 109 FindPciBios(PCM_PCI_BUS_DATA BusData)
 110 {
 111   REGS  RegsIn;
 112   REGS  RegsOut;
 113
 114   RegsIn.b.ah = 0xB1; /* Subfunction B1h */
 115   RegsIn.b.al = 0x01; /* PCI BIOS present */
 116
 117   Int386(0x1A, &RegsIn, &RegsOut);
 118
 119   if (INT386_SUCCESS(RegsOut) && RegsOut.d.edx == 0x20494350 && RegsOut.b.ah == 0)
 120     {
 121       DbgPrint((DPRINT_HWDETECT, "Found PCI bios\n"));
 122
 123       DbgPrint((DPRINT_HWDETECT, "AL: %x\n", RegsOut.b.al));
 124       DbgPrint((DPRINT_HWDETECT, "BH: %x\n", RegsOut.b.bh));
 125       DbgPrint((DPRINT_HWDETECT, "BL: %x\n", RegsOut.b.bl));
 126       DbgPrint((DPRINT_HWDETECT, "CL: %x\n", RegsOut.b.cl));
 127
 128       BusData->BusCount = RegsOut.b.cl + 1;
 129       BusData->PciVersion = RegsOut.w.bx;
 130       BusData->HardwareMechanism = RegsOut.b.cl;
 131
 132       return TRUE;
 133     }
 134
 135
 136   DbgPrint((DPRINT_HWDETECT, "No PCI bios found\n"));
 137
 138   return FALSE;
 139 }
 140
 141
 142 static VOID
 143 DetectPciIrqRoutingTable(FRLDRHKEY BusKey)
 144 {
 145   PCM_FULL_RESOURCE_DESCRIPTOR FullResourceDescriptor;
 146   PCM_PARTIAL_RESOURCE_DESCRIPTOR PartialDescriptor;
 147   PPCI_IRQ_ROUTING_TABLE Table;
 148   FRLDRHKEY TableKey;
 149   ULONG Size;
 150
 151   Table = GetPciIrqRoutingTable();
 152   if (Table != NULL)
 153     {
 154       DbgPrint((DPRINT_HWDETECT, "Table size: %u\n", Table->Size));
 155
 156       FldrCreateComponentKey(BusKey,
 157                              L"RealModeIrqRoutingTable",
 158                              0,
 159                              &TableKey);
 160
 161       /* Set 'Component Information' */
 162       FldrSetComponentInformation(TableKey,
 163                                   0x0,
 164                                   0x0,
 165                                   0xFFFFFFFF);
 166
 167       /* Set 'Identifier' value */
 168       FldrSetIdentifier(TableKey, L"PCI Real-mode IRQ Routing Table");
 169
 170       /* Set 'Configuration Data' value */
 171       Size = FIELD_OFFSET(CM_FULL_RESOURCE_DESCRIPTOR, PartialResourceList.PartialDescriptors) +
 172              2 * sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR) + Table->Size;
 173       FullResourceDescriptor = MmAllocateMemory(Size);
 174       if (FullResourceDescriptor == NULL)
 175         {
 176           DbgPrint((DPRINT_HWDETECT,
 177                     "Failed to allocate resource descriptor\n"));
 178           return;
 179         }
 180
 181       /* Initialize resource descriptor */
 182       memset(FullResourceDescriptor, 0, Size);
 183       FullResourceDescriptor->InterfaceType = Isa;
 184       FullResourceDescriptor->BusNumber = 0;
 185       FullResourceDescriptor->PartialResourceList.Version = 1;
 186       FullResourceDescriptor->PartialResourceList.Revision = 1;
 187       FullResourceDescriptor->PartialResourceList.Count = 2;
 188
 189       PartialDescriptor = &FullResourceDescriptor->PartialResourceList.PartialDescriptors[0];
 190       PartialDescriptor->Type = CmResourceTypeBusNumber;
 191       PartialDescriptor->ShareDisposition = CmResourceShareDeviceExclusive;
 192       PartialDescriptor->u.BusNumber.Start = 0;
 193       PartialDescriptor->u.BusNumber.Length = 1;
 194
 195       PartialDescriptor = &FullResourceDescriptor->PartialResourceList.PartialDescriptors[1];
 196       PartialDescriptor->Type = CmResourceTypeDeviceSpecific;
 197       PartialDescriptor->ShareDisposition = CmResourceShareUndetermined;
 198       PartialDescriptor->u.DeviceSpecificData.DataSize = Table->Size;
 199
 200       memcpy(&FullResourceDescriptor->PartialResourceList.PartialDescriptors[2],
 201              Table,
 202              Table->Size);
 203
 204       /* Set 'Configuration Data' value */
 205       FldrSetConfigurationData(TableKey, FullResourceDescriptor, Size);
 206       MmFreeMemory(FullResourceDescriptor);
 207     }
 208 }
 209
 210
 211 VOID
 212 DetectPciBios(FRLDRHKEY SystemKey, ULONG *BusNumber)
 213 {
 214   PCM_FULL_RESOURCE_DESCRIPTOR FullResourceDescriptor;
 215   CM_PCI_BUS_DATA BusData;
 216   FRLDRHKEY BiosKey;
 217   ULONG Size;
 218 #if 0
 219   FRLDRHKEY BusKey;
 220   ULONG i;
 221   WCHAR szPci[] = L"PCI";
 222 #endif
 223
 224   /* Report the PCI BIOS */
 225   if (FindPciBios(&BusData))
 226     {
 227       /* Create new bus key */
 228       FldrCreateComponentKey(SystemKey,
 229                              L"MultifunctionAdapter",
 230                              *BusNumber,
 231                              &BiosKey);
 232
 233       /* Set 'Component Information' */
 234       FldrSetComponentInformation(BiosKey,
 235                                   0x0,
 236                                   0x0,
 237                                   0xFFFFFFFF);
 238
 239       /* Increment bus number */
 240       (*BusNumber)++;
 241
 242       /* Set 'Identifier' value */
 243       FldrSetIdentifier(BiosKey, L"PCI BIOS");
 244
 245       /* Set 'Configuration Data' value */
 246       Size = sizeof(CM_FULL_RESOURCE_DESCRIPTOR);
 247       FullResourceDescriptor = MmAllocateMemory(Size);
 248       if (FullResourceDescriptor == NULL)
 249         {
 250           DbgPrint((DPRINT_HWDETECT,
 251                     "Failed to allocate resource descriptor\n"));
 252           return;
 253         }
 254
 255       /* Initialize resource descriptor */
 256       memset(FullResourceDescriptor, 0, Size);
 257       FullResourceDescriptor->InterfaceType = PCIBus;
 258       FullResourceDescriptor->BusNumber = 0;
 259       FullResourceDescriptor->PartialResourceList.Version = 1;
 260       FullResourceDescriptor->PartialResourceList.Revision = 1;
 261       FullResourceDescriptor->PartialResourceList.Count = 1;
 262       FullResourceDescriptor->PartialResourceList.PartialDescriptors[0].Type = CmResourceTypeBusNumber;
 263       FullResourceDescriptor->PartialResourceList.PartialDescriptors[0].ShareDisposition = CmResourceShareDeviceExclusive;
 264       FullResourceDescriptor->PartialResourceList.PartialDescriptors[0].u.BusNumber.Start = 0;
 265       FullResourceDescriptor->PartialResourceList.PartialDescriptors[0].u.BusNumber.Length = 1;
 266
 267       /* Set 'Configuration Data' value */
 268       FldrSetConfigurationData(BiosKey, FullResourceDescriptor, Size);
 269       MmFreeMemory(FullResourceDescriptor);
 270
 271       DetectPciIrqRoutingTable(BiosKey);
 272
 273 #if 0
 274       /*
 275        * FIXME:
 276        * Enabling this piece of code will corrupt the boot sequence!
 277        * This is probably caused by a bug in the registry code!
 278        */
 279
 280       /* Report PCI buses */
 281       for (i = 0; i < (ULONG)BusData.BusCount; i++)
 282       {
 283           FldrCreateComponentKey(SystemKey,
 284                                  L"MultifunctionAdapter",
 285                                  *BusNumber,
 286                                  &BiosKey);
 287
 288           /* Set 'Component Information' */
 289           FldrSetComponentInformation(BusKey,
 290                                       0x0,
 291                                       0x0,
 292                                       0xFFFFFFFF);
 293
 294           /* Increment bus number */
 295           (*BusNumber)++;
 296
 297           /* Set 'Identifier' value */
 298           FldrSetIdentifier(BiosKey, szPci);
 299       }
 300 #endif
 301     }
 302 }
 303
 304 /* EOF */