hw/isa/piix4.c

   1 /*
   2  * QEMU PIIX4 PCI Bridge Emulation
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "hw/hw.h"
  27 #include "hw/i386/pc.h"
  28 #include "hw/pci/pci.h"
  29 #include "hw/isa/isa.h"
  30 #include "hw/sysbus.h"
  31
  32 PCIDevice *piix4_dev;
  33
  34 typedef struct PIIX4State {
  35     PCIDevice dev;
  36 } PIIX4State;
  37
  38 #define TYPE_PIIX4_PCI_DEVICE "PIIX4"
  39 #define PIIX4_PCI_DEVICE(obj) \
  40     OBJECT_CHECK(PIIX4State, (obj), TYPE_PIIX4_PCI_DEVICE)
  41
  42 static void piix4_reset(void *opaque)
  43 {
  44     PIIX4State *d = opaque;
  45     uint8_t *pci_conf = d->dev.config;
  46
  47     pci_conf[0x04] = 0x07; // master, memory and I/O
  48     pci_conf[0x05] = 0x00;
  49     pci_conf[0x06] = 0x00;
  50     pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
  51     pci_conf[0x4c] = 0x4d;
  52     pci_conf[0x4e] = 0x03;
  53     pci_conf[0x4f] = 0x00;
  54     pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10
  55     pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10
  56     pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11
  57     pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11
  58     pci_conf[0x69] = 0x02;
  59     pci_conf[0x70] = 0x80;
  60     pci_conf[0x76] = 0x0c;
  61     pci_conf[0x77] = 0x0c;
  62     pci_conf[0x78] = 0x02;
  63     pci_conf[0x79] = 0x00;
  64     pci_conf[0x80] = 0x00;
  65     pci_conf[0x82] = 0x00;
  66     pci_conf[0xa0] = 0x08;
  67     pci_conf[0xa2] = 0x00;
  68     pci_conf[0xa3] = 0x00;
  69     pci_conf[0xa4] = 0x00;
  70     pci_conf[0xa5] = 0x00;
  71     pci_conf[0xa6] = 0x00;
  72     pci_conf[0xa7] = 0x00;
  73     pci_conf[0xa8] = 0x0f;
  74     pci_conf[0xaa] = 0x00;
  75     pci_conf[0xab] = 0x00;
  76     pci_conf[0xac] = 0x00;
  77     pci_conf[0xae] = 0x00;
  78 }
  79
  80 static const VMStateDescription vmstate_piix4 = {
  81     .name = "PIIX4",
  82     .version_id = 2,
  83     .minimum_version_id = 2,
  84     .fields = (VMStateField[]) {
  85         VMSTATE_PCI_DEVICE(dev, PIIX4State),
  86         VMSTATE_END_OF_LIST()
  87     }
  88 };
  89
  90 static void piix4_realize(PCIDevice *dev, Error **errp)
  91 {
  92     PIIX4State *d = PIIX4_PCI_DEVICE(dev);
  93
  94     if (!isa_bus_new(DEVICE(d), pci_address_space(dev),
  95                      pci_address_space_io(dev), errp)) {
  96         return;
  97     }
  98     piix4_dev = &d->dev;
  99     qemu_register_reset(piix4_reset, d);
 100 }
 101
 102 int piix4_init(PCIBus *bus, ISABus **isa_bus, int devfn)
 103 {
 104     PCIDevice *d;
 105
 106     d = pci_create_simple_multifunction(bus, devfn, true, "PIIX4");
 107     *isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(d), "isa.0"));
 108     return d->devfn;
 109 }
 110
 111 static void piix4_class_init(ObjectClass *klass, void *data)
 112 {
 113     DeviceClass *dc = DEVICE_CLASS(klass);
 114     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 115
 116     k->realize = piix4_realize;
 117     k->vendor_id = PCI_VENDOR_ID_INTEL;
 118     k->device_id = PCI_DEVICE_ID_INTEL_82371AB_0;
 119     k->class_id = PCI_CLASS_BRIDGE_ISA;
 120     dc->desc = "ISA bridge";
 121     dc->vmsd = &vmstate_piix4;
 122     /*
 123      * Reason: part of PIIX4 southbridge, needs to be wired up,
 124      * e.g. by mips_malta_init()
 125      */
 126     dc->user_creatable = false;
 127     dc->hotpluggable = false;
 128 }
 129
 130 static const TypeInfo piix4_info = {
 131     .name          = TYPE_PIIX4_PCI_DEVICE,
 132     .parent        = TYPE_PCI_DEVICE,
 133     .instance_size = sizeof(PIIX4State),
 134     .class_init    = piix4_class_init,
 135 };
 136
 137 static void piix4_register_types(void)
 138 {
 139     type_register_static(&piix4_info);
 140 }
 141
 142 type_init(piix4_register_types)