hw/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 "hw.h"
  26 #include "pc.h"
  27 #include "pci.h"
  28 #include "isa.h"
  29 #include "sysbus.h"
  30
  31 PCIDevice *piix4_dev;
  32
  33 static void piix4_reset(void *opaque)
  34 {
  35     PCIDevice *d = opaque;
  36     uint8_t *pci_conf = d->config;
  37
  38     pci_conf[0x04] = 0x07; // master, memory and I/O
  39     pci_conf[0x05] = 0x00;
  40     pci_conf[0x06] = 0x00;
  41     pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
  42     pci_conf[0x4c] = 0x4d;
  43     pci_conf[0x4e] = 0x03;
  44     pci_conf[0x4f] = 0x00;
  45     pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10
  46     pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10
  47     pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11
  48     pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11
  49     pci_conf[0x69] = 0x02;
  50     pci_conf[0x70] = 0x80;
  51     pci_conf[0x76] = 0x0c;
  52     pci_conf[0x77] = 0x0c;
  53     pci_conf[0x78] = 0x02;
  54     pci_conf[0x79] = 0x00;
  55     pci_conf[0x80] = 0x00;
  56     pci_conf[0x82] = 0x00;
  57     pci_conf[0xa0] = 0x08;
  58     pci_conf[0xa2] = 0x00;
  59     pci_conf[0xa3] = 0x00;
  60     pci_conf[0xa4] = 0x00;
  61     pci_conf[0xa5] = 0x00;
  62     pci_conf[0xa6] = 0x00;
  63     pci_conf[0xa7] = 0x00;
  64     pci_conf[0xa8] = 0x0f;
  65     pci_conf[0xaa] = 0x00;
  66     pci_conf[0xab] = 0x00;
  67     pci_conf[0xac] = 0x00;
  68     pci_conf[0xae] = 0x00;
  69 }
  70
  71 static void piix_save(QEMUFile* f, void *opaque)
  72 {
  73     PCIDevice *d = opaque;
  74     pci_device_save(d, f);
  75 }
  76
  77 static int piix_load(QEMUFile* f, void *opaque, int version_id)
  78 {
  79     PCIDevice *d = opaque;
  80     if (version_id != 2)
  81         return -EINVAL;
  82     return pci_device_load(d, f);
  83 }
  84
  85 static int piix4_initfn(PCIDevice *d)
  86 {
  87     uint8_t *pci_conf;
  88
  89     isa_bus_new(&d->qdev);
  90     register_savevm(&d->qdev, "PIIX4", 0, 2, piix_save, piix_load, d);
  91
  92     pci_conf = d->config;
  93     pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
  94     pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_0); // 82371AB/EB/MB PIIX4 PCI-to-ISA bridge
  95     pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
  96
  97     piix4_dev = d;
  98     qemu_register_reset(piix4_reset, d);
  99     return 0;
 100 }
 101
 102 int piix4_init(PCIBus *bus, int devfn)
 103 {
 104     PCIDevice *d;
 105
 106     d = pci_create_simple_multifunction(bus, devfn, true, "PIIX4");
 107     return d->devfn;
 108 }
 109
 110 static PCIDeviceInfo piix4_info[] = {
 111     {
 112         .qdev.name    = "PIIX4",
 113         .qdev.desc    = "ISA bridge",
 114         .qdev.size    = sizeof(PCIDevice),
 115         .qdev.no_user = 1,
 116         .init         = piix4_initfn,
 117     },{
 118         /* end of list */
 119     }
 120 };
 121
 122 static void piix4_register(void)
 123 {
 124     pci_qdev_register_many(piix4_info);
 125 }
 126 device_init(piix4_register);