i386/libsaio/legacy/PCI.h

   1 /* Copyright (c) 1994-1996 NeXT Software, Inc.  All rights reserved.
   2  *
   3  * PCI Configuration space structure and associated defines.
   4  *
   5  * HISTORY
   6  *
   7  * 13 May 1994  Dean Reece at NeXT
   8  *      Created.
   9  *
  10  */
  11
  12 /* The IOPCIConfigSpace structure can be used to decode the 256 byte
  13  * configuration space presented by each PCI device.  This structure
  14  * is based on the PCI LOCAL BUS SPECIFICATION, rev 2.1, section 6.1
  15  */
  16
  17 typedef struct _IOPCIConfigSpace {
  18         unsigned short  VendorID;
  19         unsigned short  DeviceID;
  20         unsigned short  Command;
  21         unsigned short  Status;
  22         unsigned long   RevisionID:8;
  23         unsigned long   ClassCode:24;
  24         unsigned char   CacheLineSize;
  25         unsigned char   LatencyTimer;
  26         unsigned char   HeaderType;
  27         unsigned char   BuiltInSelfTest;
  28         unsigned long   BaseAddress[6];
  29         unsigned long   CardbusCISpointer;
  30         unsigned short  SubVendorID;
  31         unsigned short  SubDeviceID;
  32         unsigned long   ROMBaseAddress;
  33         unsigned long   reserved3;
  34         unsigned long   reserved4;
  35         unsigned char   InterruptLine;
  36         unsigned char   InterruptPin;
  37         unsigned char   MinGrant;
  38         unsigned char   MaxLatency;
  39         unsigned long   VendorUnique[48];
  40 } IOPCIConfigSpace;
  41
  42
  43 /* PCI_DEFAULT_DATA is the value resulting from a read to a non-existent
  44  * PCI device's configuration space.
  45  */
  46
  47 #define PCI_DEFAULT_DATA        0xffffffff
  48
  49
  50 /* PCI_INVALID_VENDOR_ID is a Vendor ID reserved by the PCI/SIG and is
  51  * guaranteed not to be assigned to any vendor.
  52  */
  53
  54 #define PCI_INVALID_VENDOR_ID   0xffff