src/pirtable.c

   1 // PIR table generation (for emulators)
   2 //
   3 // Copyright (C) 2008  Kevin O'Connor <kevin@koconnor.net>
   4 // Copyright (C) 2002  MandrakeSoft S.A.
   5 //
   6 // This file may be distributed under the terms of the GNU GPLv3 license.
   7
   8 #include "pci.h" // struct pir_header
   9 #include "util.h" // checksum
  10
  11 struct pir_table {
  12     struct pir_header pir;
  13     struct pir_slot slots[6];
  14 } PACKED PIR_TABLE VISIBLE16 __attribute__((aligned(16))) = {
  15 #if CONFIG_PIRTABLE
  16     .pir = {
  17         .signature = PIR_SIGNATURE,
  18         .version = 0x0100,
  19         .size = sizeof(struct pir_table),
  20         .router_devfunc = 0x08,
  21         .compatible_devid = 0x122e8086,
  22         .checksum = 0x37, // XXX - should auto calculate
  23     },
  24     .slots = {
  25         {
  26             // first slot entry PCI-to-ISA (embedded)
  27             .dev = 1<<3,
  28             .links = {
  29                 {.link = 0x60, .bitmap = 0xdef8}, // INTA#
  30                 {.link = 0x61, .bitmap = 0xdef8}, // INTB#
  31                 {.link = 0x62, .bitmap = 0xdef8}, // INTC#
  32                 {.link = 0x63, .bitmap = 0xdef8}, // INTD#
  33             },
  34             .slot_nr = 0, // embedded
  35         }, {
  36             // second slot entry: 1st PCI slot
  37             .dev = 2<<3,
  38             .links = {
  39                 {.link = 0x61, .bitmap = 0xdef8}, // INTA#
  40                 {.link = 0x62, .bitmap = 0xdef8}, // INTB#
  41                 {.link = 0x63, .bitmap = 0xdef8}, // INTC#
  42                 {.link = 0x60, .bitmap = 0xdef8}, // INTD#
  43             },
  44             .slot_nr = 1,
  45         }, {
  46             // third slot entry: 2nd PCI slot
  47             .dev = 3<<3,
  48             .links = {
  49                 {.link = 0x62, .bitmap = 0xdef8}, // INTA#
  50                 {.link = 0x63, .bitmap = 0xdef8}, // INTB#
  51                 {.link = 0x60, .bitmap = 0xdef8}, // INTC#
  52                 {.link = 0x61, .bitmap = 0xdef8}, // INTD#
  53             },
  54             .slot_nr = 2,
  55         }, {
  56             // 4th slot entry: 3rd PCI slot
  57             .dev = 4<<3,
  58             .links = {
  59                 {.link = 0x63, .bitmap = 0xdef8}, // INTA#
  60                 {.link = 0x60, .bitmap = 0xdef8}, // INTB#
  61                 {.link = 0x61, .bitmap = 0xdef8}, // INTC#
  62                 {.link = 0x62, .bitmap = 0xdef8}, // INTD#
  63             },
  64             .slot_nr = 3,
  65         }, {
  66             // 5th slot entry: 4rd PCI slot
  67             .dev = 5<<3,
  68             .links = {
  69                 {.link = 0x60, .bitmap = 0xdef8}, // INTA#
  70                 {.link = 0x61, .bitmap = 0xdef8}, // INTB#
  71                 {.link = 0x62, .bitmap = 0xdef8}, // INTC#
  72                 {.link = 0x63, .bitmap = 0xdef8}, // INTD#
  73             },
  74             .slot_nr = 4,
  75         }, {
  76             // 6th slot entry: 5rd PCI slot
  77             .dev = 6<<3,
  78             .links = {
  79                 {.link = 0x61, .bitmap = 0xdef8}, // INTA#
  80                 {.link = 0x62, .bitmap = 0xdef8}, // INTB#
  81                 {.link = 0x63, .bitmap = 0xdef8}, // INTC#
  82                 {.link = 0x60, .bitmap = 0xdef8}, // INTD#
  83             },
  84             .slot_nr = 5,
  85         },
  86     }
  87 #endif // CONFIG_PIRTABLE
  88 };
  89
  90 void
  91 create_pirtable()
  92 {
  93     if (! CONFIG_PIRTABLE)
  94         return;
  95
  96     PIR_TABLE.pir.checksum = -checksum((u8*)&PIR_TABLE, sizeof(PIR_TABLE));
  97     SET_EBDA(pir_loc, (u32)&PIR_TABLE);
  98 }