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 BOOL
 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   LONG Error;
 151
 152   Table = GetPciIrqRoutingTable();
 153   if (Table != NULL)
 154     {
 155       DbgPrint((DPRINT_HWDETECT, "Table size: %u\n", Table->Size));
 156
 157       Error = RegCreateKey(BusKey,
 158                            L"RealModeIrqRoutingTable\\0",
 159                            &TableKey);
 160       if (Error != ERROR_SUCCESS)
 161         {
 162           DbgPrint((DPRINT_HWDETECT, "RegCreateKey() failed (Error %u)\n", (int)Error));
 163           return;
 164         }
 165
 166       /* Set 'Component Information' */
 167       SetComponentInformation(TableKey,
 168                               0x0,
 169                               0x0,
 170                               0xFFFFFFFF);
 171
 172       /* Set 'Identifier' value */
 173       Error = RegSetValue(TableKey,
 174                           L"Identifier",
 175                           REG_SZ,
 176                           (PCHAR)L"PCI Real-mode IRQ Routing Table",
 177                           32 * sizeof(WCHAR));
 178       if (Error != ERROR_SUCCESS)
 179         {
 180           DbgPrint((DPRINT_HWDETECT, "RegSetValue() failed (Error %u)\n", (int)Error));
 181           return;
 182         }
 183
 184       /* Set 'Configuration Data' value */
 185       Size = sizeof(CM_FULL_RESOURCE_DESCRIPTOR) +
 186              Table->Size;
 187       FullResourceDescriptor = MmAllocateMemory(Size);
 188       if (FullResourceDescriptor == NULL)
 189         {
 190           DbgPrint((DPRINT_HWDETECT,
 191                     "Failed to allocate resource descriptor\n"));
 192           return;
 193         }
 194
 195       /* Initialize resource descriptor */
 196       memset(FullResourceDescriptor, 0, Size);
 197       FullResourceDescriptor->InterfaceType = Isa;
 198       FullResourceDescriptor->BusNumber = 0;
 199       FullResourceDescriptor->PartialResourceList.Count = 1;
 200
 201       PartialDescriptor = &FullResourceDescriptor->PartialResourceList.PartialDescriptors[0];
 202       PartialDescriptor->Type = CmResourceTypeDeviceSpecific;
 203       PartialDescriptor->ShareDisposition = CmResourceShareUndetermined;
 204       PartialDescriptor->u.DeviceSpecificData.DataSize = Table->Size;
 205
 206       memcpy((PVOID)((ULONG_PTR)FullResourceDescriptor + sizeof(CM_FULL_RESOURCE_DESCRIPTOR)),
 207              Table,
 208              Table->Size);
 209
 210       /* Set 'Configuration Data' value */
 211       Error = RegSetValue(TableKey,
 212                           L"Configuration Data",
 213                           REG_FULL_RESOURCE_DESCRIPTOR,
 214                           (PCHAR) FullResourceDescriptor,
 215                           Size);
 216       MmFreeMemory(FullResourceDescriptor);
 217       if (Error != ERROR_SUCCESS)
 218         {
 219           DbgPrint((DPRINT_HWDETECT,
 220                     "RegSetValue(Configuration Data) failed (Error %u)\n",
 221                     (int)Error));
 222           return;
 223         }
 224     }
 225 }
 226
 227
 228 VOID
 229 DetectPciBios(FRLDRHKEY SystemKey, ULONG *BusNumber)
 230 {
 231   PCM_FULL_RESOURCE_DESCRIPTOR FullResourceDescriptor;
 232   CM_PCI_BUS_DATA BusData;
 233   WCHAR Buffer[80];
 234   FRLDRHKEY BiosKey;
 235   ULONG Size;
 236   LONG Error;
 237 #if 0
 238   FRLDRHKEY BusKey;
 239   ULONG i;
 240 #endif
 241
 242   /* Report the PCI BIOS */
 243   if (FindPciBios(&BusData))
 244     {
 245       /* Create new bus key */
 246       swprintf(Buffer,
 247               L"MultifunctionAdapter\\%u", *BusNumber);
 248       Error = RegCreateKey(SystemKey,
 249                            Buffer,
 250                            &BiosKey);
 251       if (Error != ERROR_SUCCESS)
 252         {
 253           DbgPrint((DPRINT_HWDETECT, "RegCreateKey() failed (Error %u)\n", (int)Error));
 254           return;
 255         }
 256
 257       /* Set 'Component Information' */
 258       SetComponentInformation(BiosKey,
 259                               0x0,
 260                               0x0,
 261                               0xFFFFFFFF);
 262
 263       /* Increment bus number */
 264       (*BusNumber)++;
 265
 266       /* Set 'Identifier' value */
 267       Error = RegSetValue(BiosKey,
 268                           L"Identifier",
 269                           REG_SZ,
 270                           (PCHAR)L"PCI BIOS",
 271                           9 * sizeof(WCHAR));
 272       if (Error != ERROR_SUCCESS)
 273         {
 274           DbgPrint((DPRINT_HWDETECT, "RegSetValue() failed (Error %u)\n", (int)Error));
 275           return;
 276         }
 277
 278       /* Set 'Configuration Data' value */
 279       Size = sizeof(CM_FULL_RESOURCE_DESCRIPTOR) -
 280              sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR);
 281       FullResourceDescriptor = MmAllocateMemory(Size);
 282       if (FullResourceDescriptor == NULL)
 283         {
 284           DbgPrint((DPRINT_HWDETECT,
 285                     "Failed to allocate resource descriptor\n"));
 286           return;
 287         }
 288
 289       /* Initialize resource descriptor */
 290       memset(FullResourceDescriptor, 0, Size);
 291       FullResourceDescriptor->InterfaceType = PCIBus;
 292       FullResourceDescriptor->BusNumber = 0;
 293       FullResourceDescriptor->PartialResourceList.Count = 0;
 294
 295       /* Set 'Configuration Data' value */
 296       Error = RegSetValue(BiosKey,
 297                           L"Configuration Data",
 298                           REG_FULL_RESOURCE_DESCRIPTOR,
 299                           (PCHAR) FullResourceDescriptor,
 300                           Size);
 301       MmFreeMemory(FullResourceDescriptor);
 302       if (Error != ERROR_SUCCESS)
 303         {
 304           DbgPrint((DPRINT_HWDETECT,
 305                     "RegSetValue(Configuration Data) failed (Error %u)\n",
 306                     (int)Error));
 307           return;
 308         }
 309
 310       DetectPciIrqRoutingTable(BiosKey);
 311
 312 #if 0
 313       /*
 314        * FIXME:
 315        * Enabling this piece of code will corrupt the boot sequence!
 316        * This is probably caused by a bug in the registry code!
 317        */
 318
 319       /* Report PCI buses */
 320       for (i = 0; i < (ULONG)BusData.BusCount; i++)
 321         {
 322           swprintf(Buffer,
 323                    L"MultifunctionAdapter\\%u", *BusNumber);
 324           Error = RegCreateKey(SystemKey,
 325                                Buffer,
 326                                &BusKey);
 327           if (Error != ERROR_SUCCESS)
 328             {
 329               DbgPrint((DPRINT_HWDETECT, "RegCreateKey() failed (Error %u)\n", (int)Error));
 330               printf("RegCreateKey() failed (Error %u)\n", (int)Error);
 331               return;
 332             }
 333
 334           /* Set 'Component Information' */
 335           SetComponentInformation(BusKey,
 336                                   0x0,
 337                                   0x0,
 338                                   0xFFFFFFFF);
 339
 340           /* Increment bus number */
 341           (*BusNumber)++;
 342
 343
 344           /* Set 'Identifier' value */
 345           Error = RegSetValue(BusKey,
 346                               L"Identifier",
 347                               REG_SZ,
 348                               (PUCHAR)"PCI",
 349                               4 * sizeof(WCHAR));
 350           if (Error != ERROR_SUCCESS)
 351             {
 352               DbgPrint((DPRINT_HWDETECT, "RegSetValue() failed (Error %u)\n", (int)Error));
 353               return;
 354             }
 355         }
 356 #endif
 357
 358     }
 359 }
 360
 361 /* EOF */