include/asm-i386/mca.h

   1 /* -*- mode: c; c-basic-offset: 8 -*- */
   2
   3 /* Platform specific MCA defines */
   4 #ifndef _ASM_MCA_H
   5 #define _ASM_MCA_H
   6
   7 /* Maximal number of MCA slots - actually, some machines have less, but
   8  * they all have sufficient number of POS registers to cover 8.
   9  */
  10 #define MCA_MAX_SLOT_NR  8
  11
  12 /* Most machines have only one MCA bus.  The only multiple bus machines
  13  * I know have at most two */
  14 #define MAX_MCA_BUSSES 2
  15
  16 #define MCA_PRIMARY_BUS         0
  17 #define MCA_SECONDARY_BUS       1
  18
  19 /* Dummy slot numbers on primary MCA for integrated functions */
  20 #define MCA_INTEGSCSI   (MCA_MAX_SLOT_NR)
  21 #define MCA_INTEGVIDEO  (MCA_MAX_SLOT_NR+1)
  22 #define MCA_MOTHERBOARD (MCA_MAX_SLOT_NR+2)
  23
  24 /* Dummy POS values for integrated functions */
  25 #define MCA_DUMMY_POS_START     0x10000
  26 #define MCA_INTEGSCSI_POS       (MCA_DUMMY_POS_START+1)
  27 #define MCA_INTEGVIDEO_POS      (MCA_DUMMY_POS_START+2)
  28 #define MCA_MOTHERBOARD_POS     (MCA_DUMMY_POS_START+3)
  29
  30 /* MCA registers */
  31
  32 #define MCA_MOTHERBOARD_SETUP_REG       0x94
  33 #define MCA_ADAPTER_SETUP_REG           0x96
  34 #define MCA_POS_REG(n)                  (0x100+(n))
  35
  36 #define MCA_ENABLED     0x01    /* POS 2, set if adapter enabled */
  37
  38 /* Max number of adapters, including both slots and various integrated
  39  * things.
  40  */
  41 #define MCA_NUMADAPTERS (MCA_MAX_SLOT_NR+3)
  42
  43 #endif