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 _PCI_REGISTRY_INFO
  58 {
  59     UCHAR MajorRevision;
  60     UCHAR MinorRevision;
  61     UCHAR NoBuses;
  62     UCHAR HardwareMechanism;
  63 } PCI_REGISTRY_INFO, *PPCI_REGISTRY_INFO;
  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_PTR)Table < 0x100000)
  75     {
  76       if (Table->Signature == 0x52495024)
  77         {
  78           DPRINTM(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               DPRINTM(DPRINT_HWDETECT,
  91                         "Invalid routing table\n");
  92               return NULL;
  93             }
  94
  95           DPRINTM(DPRINT_HWDETECT,
  96                    "Valid checksum\n");
  97
  98           return Table;
  99         }
 100
 101       Table = (PPCI_IRQ_ROUTING_TABLE)((ULONG_PTR)Table + 0x10);
 102     }
 103
 104   return NULL;
 105 }
 106
 107
 108 static BOOLEAN
 109 FindPciBios(PPCI_REGISTRY_INFO 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       DPRINTM(DPRINT_HWDETECT, "Found PCI bios\n");
 122
 123       DPRINTM(DPRINT_HWDETECT, "AL: %x\n", RegsOut.b.al);
 124       DPRINTM(DPRINT_HWDETECT, "BH: %x\n", RegsOut.b.bh);
 125       DPRINTM(DPRINT_HWDETECT, "BL: %x\n", RegsOut.b.bl);
 126       DPRINTM(DPRINT_HWDETECT, "CL: %x\n", RegsOut.b.cl);
 127
 128       BusData->NoBuses = RegsOut.b.cl + 1;
 129       BusData->MajorRevision = RegsOut.b.bh;
 130       BusData->MinorRevision = RegsOut.b.bl;
 131       BusData->HardwareMechanism = RegsOut.b.cl;
 132
 133       return TRUE;
 134     }
 135
 136
 137   DPRINTM(DPRINT_HWDETECT, "No PCI bios found\n");
 138
 139   return FALSE;
 140 }
 141
 142
 143 static VOID
 144 DetectPciIrqRoutingTable(PCONFIGURATION_COMPONENT_DATA BusKey)
 145 {
 146   PCM_PARTIAL_RESOURCE_LIST PartialResourceList;
 147   PCM_PARTIAL_RESOURCE_DESCRIPTOR PartialDescriptor;
 148   PPCI_IRQ_ROUTING_TABLE Table;
 149   PCONFIGURATION_COMPONENT_DATA TableKey;
 150   ULONG Size;
 151
 152   Table = GetPciIrqRoutingTable();
 153   if (Table != NULL)
 154     {
 155       DPRINTM(DPRINT_HWDETECT, "Table size: %u\n", Table->Size);
 156
 157       /* Set 'Configuration Data' value */
 158       Size = FIELD_OFFSET(CM_PARTIAL_RESOURCE_LIST, PartialDescriptors) +
 159          2 * sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR) + Table->Size;
 160       PartialResourceList = MmHeapAlloc(Size);
 161       if (PartialResourceList == NULL)
 162       {
 163           DPRINTM(DPRINT_HWDETECT,
 164               "Failed to allocate resource descriptor\n");
 165           return;
 166       }
 167
 168       /* Initialize resource descriptor */
 169       memset(PartialResourceList, 0, Size);
 170       PartialResourceList->Version = 1;
 171       PartialResourceList->Revision = 1;
 172       PartialResourceList->Count = 2;
 173
 174       PartialDescriptor = &PartialResourceList->PartialDescriptors[0];
 175       PartialDescriptor->Type = CmResourceTypeBusNumber;
 176       PartialDescriptor->ShareDisposition = CmResourceShareDeviceExclusive;
 177       PartialDescriptor->u.BusNumber.Start = 0;
 178       PartialDescriptor->u.BusNumber.Length = 1;
 179
 180       PartialDescriptor = &PartialResourceList->PartialDescriptors[1];
 181       PartialDescriptor->Type = CmResourceTypeDeviceSpecific;
 182       PartialDescriptor->ShareDisposition = CmResourceShareUndetermined;
 183       PartialDescriptor->u.DeviceSpecificData.DataSize = Table->Size;
 184
 185       memcpy(&PartialResourceList->PartialDescriptors[2],
 186           Table, Table->Size);
 187
 188       FldrCreateComponentKey(BusKey,
 189                              PeripheralClass,
 190                              RealModeIrqRoutingTable,
 191                              0x0,
 192                              0x0,
 193                              0xFFFFFFFF,
 194                              "PCI Real-mode IRQ Routing Table",
 195                              PartialResourceList,
 196                              Size,
 197                              &TableKey);
 198
 199       MmHeapFree(PartialResourceList);
 200     }
 201 }
 202
 203
 204 VOID
 205 DetectPciBios(PCONFIGURATION_COMPONENT_DATA SystemKey, ULONG *BusNumber)
 206 {
 207   PCM_PARTIAL_RESOURCE_LIST PartialResourceList;
 208   PCM_PARTIAL_RESOURCE_DESCRIPTOR PartialDescriptor;
 209   PCI_REGISTRY_INFO BusData;
 210   PCONFIGURATION_COMPONENT_DATA BiosKey;
 211   ULONG Size;
 212   PCONFIGURATION_COMPONENT_DATA BusKey;
 213   ULONG i;
 214
 215   /* Report the PCI BIOS */
 216   if (FindPciBios(&BusData))
 217     {
 218       /* Set 'Configuration Data' value */
 219       Size = FIELD_OFFSET(CM_PARTIAL_RESOURCE_LIST,
 220                           PartialDescriptors);
 221       PartialResourceList = MmHeapAlloc(Size);
 222       if (PartialResourceList == NULL)
 223       {
 224           DPRINTM(DPRINT_HWDETECT,
 225               "Failed to allocate resource descriptor\n");
 226           return;
 227       }
 228
 229       /* Initialize resource descriptor */
 230       memset(PartialResourceList, 0, Size);
 231
 232       /* Create new bus key */
 233       FldrCreateComponentKey(SystemKey,
 234                              AdapterClass,
 235                              MultiFunctionAdapter,
 236                              0x0,
 237                              0x0,
 238                              0xFFFFFFFF,
 239                              "PCI BIOS",
 240                              PartialResourceList,
 241                              Size,
 242                              &BiosKey);
 243
 244       /* Increment bus number */
 245       (*BusNumber)++;
 246
 247       MmHeapFree(PartialResourceList);
 248
 249       DetectPciIrqRoutingTable(BiosKey);
 250
 251       /* Report PCI buses */
 252       for (i = 0; i < (ULONG)BusData.NoBuses; i++)
 253       {
 254           /* Check if this is the first bus */
 255           if (i == 0)
 256           {
 257               /* Set 'Configuration Data' value */
 258               Size = FIELD_OFFSET(CM_PARTIAL_RESOURCE_LIST,
 259                                   PartialDescriptors) +
 260                      sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR) +
 261                      sizeof(PCI_REGISTRY_INFO);
 262               PartialResourceList = MmHeapAlloc(Size);
 263               if (!PartialResourceList)
 264               {
 265                   DPRINTM(DPRINT_HWDETECT,
 266                             "Failed to allocate resource descriptor\n");
 267                   return;
 268               }
 269
 270               /* Initialize resource descriptor */
 271               memset(PartialResourceList, 0, Size);
 272               PartialResourceList->Version = 1;
 273               PartialResourceList->Revision = 1;
 274               PartialResourceList->Count = 1;
 275               PartialDescriptor = &PartialResourceList->PartialDescriptors[0];
 276               PartialDescriptor->Type = CmResourceTypeDeviceSpecific;
 277               PartialDescriptor->ShareDisposition = CmResourceShareUndetermined;
 278               PartialDescriptor->u.DeviceSpecificData.DataSize = sizeof(PCI_REGISTRY_INFO);
 279               memcpy(&PartialResourceList->PartialDescriptors[1],
 280                      &BusData,
 281                      sizeof(PCI_REGISTRY_INFO));
 282           }
 283           else
 284           {
 285               /* Set 'Configuration Data' value */
 286               Size = FIELD_OFFSET(CM_PARTIAL_RESOURCE_LIST,
 287                                   PartialDescriptors);
 288               PartialResourceList = MmHeapAlloc(Size);
 289               if (!PartialResourceList)
 290               {
 291                   DPRINTM(DPRINT_HWDETECT,
 292                             "Failed to allocate resource descriptor\n");
 293                   return;
 294               }
 295
 296               /* Initialize resource descriptor */
 297               memset(PartialResourceList, 0, Size);
 298           }
 299
 300           /* Create the bus key */
 301           FldrCreateComponentKey(SystemKey,
 302                                  AdapterClass,
 303                                  MultiFunctionAdapter,
 304                                  0x0,
 305                                  0x0,
 306                                  0xFFFFFFFF,
 307                                  "PCI",
 308                                  PartialResourceList,
 309                                  Size,
 310                                  &BusKey);
 311
 312           MmHeapFree(PartialResourceList);
 313
 314           /* Increment bus number */
 315           (*BusNumber)++;
 316       }
 317     }
 318 }
 319
 320 /* EOF */