91 lines
1.5 KiB
C
91 lines
1.5 KiB
C
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/*++
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Copyright (c) 1998 Microsoft Corporation
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Module Name:
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pcibios.h
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Abstract:
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This module contains support routines for the Pci Irq Routing.
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Author:
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Santosh Jodh (santoshj) 15-Sept-1998
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Environment:
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Kernel mode
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--*/
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#ifndef _PCIBIOS_
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#define _PCIBIOS_
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//
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// Maximum number of interrupt pins possible on a single
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// Pci device (CS offset 3D).
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//
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#define NUM_IRQ_PINS 4
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//
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// Structure definitions for Pci Irq Routing.
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//
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#pragma pack(1)
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//
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// Structure of information for one link.
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//
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typedef struct _PIN_INFO {
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UCHAR Link;
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USHORT InterruptMap;
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} PIN_INFO, *PPIN_INFO;
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//
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// Structure of information for one slot entry.
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//
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typedef struct _SLOT_INFO {
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UCHAR BusNumber;
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UCHAR DeviceNumber;
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PIN_INFO PinInfo[NUM_IRQ_PINS];
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UCHAR SlotNumber;
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UCHAR Reserved[1];
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} SLOT_INFO, *PSLOT_INFO, far *FPSLOT_INFO;
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//
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// Structure of the $PIR table according to MS specification.
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//
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typedef struct _PCI_IRQ_ROUTING_TABLE {
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ULONG Signature;
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USHORT Version;
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USHORT TableSize;
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UCHAR RouterBus;
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UCHAR RouterDevFunc;
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USHORT ExclusiveIRQs;
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ULONG CompatibleRouter;
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ULONG MiniportData;
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UCHAR Reserved0[11];
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UCHAR Checksum;
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} PCI_IRQ_ROUTING_TABLE, *PPCI_IRQ_ROUTING_TABLE, far *FPPCI_IRQ_ROUTING_TABLE;
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//#pragma pack(pop)
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//
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// Calls PCI BIOS to get the IRQ Routing table.
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//
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FPPCI_IRQ_ROUTING_TABLE
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HwGetRealModeIrqRoutingTable(
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VOID
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);
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#endif // _PCIBIOS_
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