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 } GrackleState;
  45
  46 /* Don't know if this matches real hardware, but it agrees with OHW.  */
  47 static int pci_grackle_map_irq(PCIDevice *pci_dev, int irq_num)
  48 {
  49     return (irq_num + (pci_dev->devfn >> 3)) & 3;
  50 }
  51
  52 static void pci_grackle_set_irq(void *opaque, int irq_num, int level)
  53 {
  54     qemu_irq *pic = opaque;
  55
  56     GRACKLE_DPRINTF("set_irq num %d level %d\n", irq_num, level);
  57     qemu_set_irq(pic[irq_num + 0x15], level);
  58 }
  59
  60 static void pci_grackle_reset(void *opaque)
  61 {
  62 }
  63
  64 PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic,
  65                          MemoryRegion *address_space_mem,
  66                          MemoryRegion *address_space_io)
  67 {
  68     DeviceState *dev;
  69     SysBusDevice *s;
  70     GrackleState *d;
  71
  72     dev = qdev_create(NULL, "grackle");
  73     qdev_init_nofail(dev);
  74     s = sysbus_from_qdev(dev);
  75     d = FROM_SYSBUS(GrackleState, s);
  76     d->host_state.bus = pci_register_bus(&d->busdev.qdev, "pci",
  77                                          pci_grackle_set_irq,
  78                                          pci_grackle_map_irq,
  79                                          pic,
  80                                          address_space_mem,
  81                                          address_space_io,
  82                                          0, 4);
  83
  84     pci_create_simple(d->host_state.bus, 0, "grackle");
  85
  86     sysbus_mmio_map(s, 0, base);
  87     sysbus_mmio_map(s, 1, base + 0x00200000);
  88
  89     return d->host_state.bus;
  90 }
  91
  92 static int pci_grackle_init_device(SysBusDevice *dev)
  93 {
  94     GrackleState *s;
  95     int pci_mem_config, pci_mem_data;
  96
  97     s = FROM_SYSBUS(GrackleState, dev);
  98
  99     pci_mem_config = pci_host_conf_register_mmio(&s->host_state,
 100                                                  DEVICE_LITTLE_ENDIAN);
 101     pci_mem_data = pci_host_data_register_mmio(&s->host_state,
 102                                                DEVICE_LITTLE_ENDIAN);
 103     sysbus_init_mmio(dev, 0x1000, pci_mem_config);
 104     sysbus_init_mmio(dev, 0x1000, pci_mem_data);
 105
 106     qemu_register_reset(pci_grackle_reset, &s->host_state);
 107     return 0;
 108 }
 109
 110 static int grackle_pci_host_init(PCIDevice *d)
 111 {
 112     d->config[0x09] = 0x01;
 113     return 0;
 114 }
 115
 116 static PCIDeviceInfo grackle_pci_host_info = {
 117     .qdev.name = "grackle",
 118     .qdev.size = sizeof(PCIDevice),
 119     .init      = grackle_pci_host_init,
 120     .vendor_id = PCI_VENDOR_ID_MOTOROLA,
 121     .device_id = PCI_DEVICE_ID_MOTOROLA_MPC106,
 122     .revision  = 0x00,
 123     .class_id  = PCI_CLASS_BRIDGE_HOST,
 124 };
 125
 126 static void grackle_register_devices(void)
 127 {
 128     sysbus_register_dev("grackle", sizeof(GrackleState),
 129                         pci_grackle_init_device);
 130     pci_qdev_register(&grackle_pci_host_info);
 131 }
 132
 133 device_init(grackle_register_devices)