xref: /openbmc/qemu/hw/pci-host/grackle.c (revision 9d49b1c9edf829e571093088ddff0b73db3110c6)
1  /*
2   * QEMU Grackle PCI host (heathrow OldWorld PowerMac)
3   *
4   * Copyright (c) 2006-2007 Fabrice Bellard
5   * Copyright (c) 2007 Jocelyn Mayer
6   *
7   * Permission is hereby granted, free of charge, to any person obtaining a copy
8   * of this software and associated documentation files (the "Software"), to deal
9   * in the Software without restriction, including without limitation the rights
10   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11   * copies of the Software, and to permit persons to whom the Software is
12   * furnished to do so, subject to the following conditions:
13   *
14   * The above copyright notice and this permission notice shall be included in
15   * all copies or substantial portions of the Software.
16   *
17   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23   * THE SOFTWARE.
24   */
25  
26  #include "qemu/osdep.h"
27  #include "hw/qdev-properties.h"
28  #include "hw/pci/pci_device.h"
29  #include "hw/irq.h"
30  #include "qapi/error.h"
31  #include "qemu/module.h"
32  #include "trace.h"
33  #include "qom/object.h"
34  #include "hw/pci-host/grackle.h"
35  
36  /* Don't know if this matches real hardware, but it agrees with OHW.  */
37  static int pci_grackle_map_irq(PCIDevice *pci_dev, int irq_num)
38  {
39      return (irq_num + (pci_dev->devfn >> 3)) & 3;
40  }
41  
42  static void pci_grackle_set_irq(void *opaque, int irq_num, int level)
43  {
44      GrackleState *s = opaque;
45  
46      trace_grackle_set_irq(irq_num, level);
47      qemu_set_irq(s->irqs[irq_num], level);
48  }
49  
50  static void grackle_realize(DeviceState *dev, Error **errp)
51  {
52      GrackleState *s = GRACKLE_PCI_HOST_BRIDGE(dev);
53      PCIHostState *phb = PCI_HOST_BRIDGE(dev);
54  
55      phb->bus = pci_register_root_bus(dev, NULL,
56                                       pci_grackle_set_irq,
57                                       pci_grackle_map_irq,
58                                       s,
59                                       &s->pci_mmio,
60                                       &s->pci_io,
61                                       0, 4, TYPE_PCI_BUS);
62  
63      pci_create_simple(phb->bus, 0, "grackle");
64  }
65  
66  static void grackle_init(Object *obj)
67  {
68      GrackleState *s = GRACKLE_PCI_HOST_BRIDGE(obj);
69      SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
70      PCIHostState *phb = PCI_HOST_BRIDGE(obj);
71  
72      memory_region_init(&s->pci_mmio, OBJECT(s), "pci-mmio", 0x100000000ULL);
73      memory_region_init_io(&s->pci_io, OBJECT(s), &unassigned_io_ops, obj,
74                            "pci-isa-mmio", 0x00200000);
75  
76      memory_region_init_alias(&s->pci_hole, OBJECT(s), "pci-hole", &s->pci_mmio,
77                               0x80000000ULL, 0x7e000000ULL);
78  
79      memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops,
80                            DEVICE(obj), "pci-conf-idx", 0x1000);
81      memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops,
82                            DEVICE(obj), "pci-data-idx", 0x1000);
83  
84      sysbus_init_mmio(sbd, &phb->conf_mem);
85      sysbus_init_mmio(sbd, &phb->data_mem);
86      sysbus_init_mmio(sbd, &s->pci_hole);
87      sysbus_init_mmio(sbd, &s->pci_io);
88  
89      qdev_init_gpio_out(DEVICE(obj), s->irqs, ARRAY_SIZE(s->irqs));
90  }
91  
92  static void grackle_pci_realize(PCIDevice *d, Error **errp)
93  {
94      d->config[PCI_CLASS_PROG] = 0x01;
95  }
96  
97  static void grackle_pci_class_init(ObjectClass *klass, void *data)
98  {
99      DeviceClass *dc = DEVICE_CLASS(klass);
100      PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
101  
102      k->realize   = grackle_pci_realize;
103      k->vendor_id = PCI_VENDOR_ID_MOTOROLA;
104      k->device_id = PCI_DEVICE_ID_MOTOROLA_MPC106;
105      k->revision  = 0x00;
106      k->class_id  = PCI_CLASS_BRIDGE_HOST;
107      /*
108       * PCI-facing part of the host bridge, not usable without the
109       * host-facing part, which can't be device_add'ed, yet.
110       */
111      dc->user_creatable = false;
112  }
113  
114  static const TypeInfo grackle_pci_info = {
115      .name          = "grackle",
116      .parent        = TYPE_PCI_DEVICE,
117      .instance_size = sizeof(PCIDevice),
118      .class_init = grackle_pci_class_init,
119      .interfaces = (InterfaceInfo[]) {
120          { INTERFACE_CONVENTIONAL_PCI_DEVICE },
121          { },
122      },
123  };
124  
125  static char *grackle_ofw_unit_address(const SysBusDevice *dev)
126  {
127      GrackleState *s = GRACKLE_PCI_HOST_BRIDGE(dev);
128  
129      return g_strdup_printf("%x", s->ofw_addr);
130  }
131  
132  static Property grackle_properties[] = {
133      DEFINE_PROP_UINT32("ofw-addr", GrackleState, ofw_addr, -1),
134      DEFINE_PROP_END_OF_LIST()
135  };
136  
137  static void grackle_class_init(ObjectClass *klass, void *data)
138  {
139      DeviceClass *dc = DEVICE_CLASS(klass);
140      SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
141  
142      dc->realize = grackle_realize;
143      device_class_set_props(dc, grackle_properties);
144      set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
145      dc->fw_name = "pci";
146      sbc->explicit_ofw_unit_address = grackle_ofw_unit_address;
147  }
148  
149  static const TypeInfo grackle_host_info = {
150      .name          = TYPE_GRACKLE_PCI_HOST_BRIDGE,
151      .parent        = TYPE_PCI_HOST_BRIDGE,
152      .instance_size = sizeof(GrackleState),
153      .instance_init = grackle_init,
154      .class_init    = grackle_class_init,
155  };
156  
157  static void grackle_register_types(void)
158  {
159      type_register_static(&grackle_pci_info);
160      type_register_static(&grackle_host_info);
161  }
162  
163  type_init(grackle_register_types)
164