hw/grackle_pci.c

   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 "sysbus.h"
  27 #include "ppc_mac.h"
  28 #include "pci.h"
  29 #include "pci_host.h"
  30
  31 /* debug Grackle */
  32 //#define DEBUG_GRACKLE
  33
  34 #ifdef DEBUG_GRACKLE
  35 #define GRACKLE_DPRINTF(fmt, ...)                               \
  36     do { printf("GRACKLE: " fmt , ## __VA_ARGS__); } while (0)
  37 #else
  38 #define GRACKLE_DPRINTF(fmt, ...)
  39 #endif
  40
  41 typedef struct GrackleState {
  42     SysBusDevice busdev;
  43     PCIHostState host_state;
  44     MemoryRegion pci_mmio;
  45     MemoryRegion pci_hole;
  46 } GrackleState;
  47
  48 /* Don't know if this matches real hardware, but it agrees with OHW.  */
  49 static int pci_grackle_map_irq(PCIDevice *pci_dev, int irq_num)
  50 {
  51     return (irq_num + (pci_dev->devfn >> 3)) & 3;
  52 }
  53
  54 static void pci_grackle_set_irq(void *opaque, int irq_num, int level)
  55 {
  56     qemu_irq *pic = opaque;
  57
  58     GRACKLE_DPRINTF("set_irq num %d level %d\n", irq_num, level);
  59     qemu_set_irq(pic[irq_num + 0x15], level);
  60 }
  61
  62 static void pci_grackle_reset(void *opaque)
  63 {
  64 }
  65
  66 PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic,
  67                          MemoryRegion *address_space_mem,
  68                          MemoryRegion *address_space_io)
  69 {
  70     DeviceState *dev;
  71     SysBusDevice *s;
  72     GrackleState *d;
  73
  74     dev = qdev_create(NULL, "grackle");
  75     qdev_init_nofail(dev);
  76     s = sysbus_from_qdev(dev);
  77     d = FROM_SYSBUS(GrackleState, s);
  78
  79     memory_region_init(&d->pci_mmio, "pci-mmio", 0x100000000ULL);
  80     memory_region_init_alias(&d->pci_hole, "pci-hole", &d->pci_mmio,
  81                              0x80000000ULL, 0x7e000000ULL);
  82     memory_region_add_subregion(address_space_mem, 0x80000000ULL,
  83                                 &d->pci_hole);
  84
  85     d->host_state.bus = pci_register_bus(&d->busdev.qdev, "pci",
  86                                          pci_grackle_set_irq,
  87                                          pci_grackle_map_irq,
  88                                          pic,
  89                                          &d->pci_mmio,
  90                                          address_space_io,
  91                                          0, 4);
  92
  93     pci_create_simple(d->host_state.bus, 0, "grackle");
  94
  95     sysbus_mmio_map(s, 0, base);
  96     sysbus_mmio_map(s, 1, base + 0x00200000);
  97
  98     return d->host_state.bus;
  99 }
 100
 101 static int pci_grackle_init_device(SysBusDevice *dev)
 102 {
 103     GrackleState *s;
 104
 105     s = FROM_SYSBUS(GrackleState, dev);
 106
 107     memory_region_init_io(&s->host_state.conf_mem, &pci_host_conf_le_ops,
 108                           &s->host_state, "pci-conf-idx", 0x1000);
 109     memory_region_init_io(&s->host_state.data_mem, &pci_host_data_le_ops,
 110                           &s->host_state, "pci-data-idx", 0x1000);
 111     sysbus_init_mmio_region(dev, &s->host_state.conf_mem);
 112     sysbus_init_mmio_region(dev, &s->host_state.data_mem);
 113
 114     qemu_register_reset(pci_grackle_reset, &s->host_state);
 115     return 0;
 116 }
 117
 118 static int grackle_pci_host_init(PCIDevice *d)
 119 {
 120     d->config[0x09] = 0x01;
 121     return 0;
 122 }
 123
 124 static PCIDeviceInfo grackle_pci_host_info = {
 125     .qdev.name = "grackle",
 126     .qdev.size = sizeof(PCIDevice),
 127     .init      = grackle_pci_host_init,
 128     .vendor_id = PCI_VENDOR_ID_MOTOROLA,
 129     .device_id = PCI_DEVICE_ID_MOTOROLA_MPC106,
 130     .revision  = 0x00,
 131     .class_id  = PCI_CLASS_BRIDGE_HOST,
 132 };
 133
 134 static void grackle_register_devices(void)
 135 {
 136     sysbus_register_dev("grackle", sizeof(GrackleState),
 137                         pci_grackle_init_device);
 138     pci_qdev_register(&grackle_pci_host_info);
 139 }
 140
 141 device_init(grackle_register_devices)