hw/prep_pci.c

   1 /*
   2  * QEMU PREP PCI host
   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 "pci.h"
  27 #include "pci_host.h"
  28 #include "pc.h"
  29 #include "exec-memory.h"
  30
  31 typedef struct PRePPCIState {
  32     PCIHostState host_state;
  33     MemoryRegion intack;
  34     qemu_irq irq[4];
  35 } PREPPCIState;
  36
  37 typedef struct RavenPCIState {
  38     PCIDevice dev;
  39 } RavenPCIState;
  40
  41 static inline uint32_t PPC_PCIIO_config(target_phys_addr_t addr)
  42 {
  43     int i;
  44
  45     for(i = 0; i < 11; i++) {
  46         if ((addr & (1 << (11 + i))) != 0)
  47             break;
  48     }
  49     return (addr & 0x7ff) |  (i << 11);
  50 }
  51
  52 static void ppc_pci_io_write(void *opaque, target_phys_addr_t addr,
  53                              uint64_t val, unsigned int size)
  54 {
  55     PREPPCIState *s = opaque;
  56     pci_data_write(s->host_state.bus, PPC_PCIIO_config(addr), val, size);
  57 }
  58
  59 static uint64_t ppc_pci_io_read(void *opaque, target_phys_addr_t addr,
  60                                 unsigned int size)
  61 {
  62     PREPPCIState *s = opaque;
  63     return pci_data_read(s->host_state.bus, PPC_PCIIO_config(addr), size);
  64 }
  65
  66 static const MemoryRegionOps PPC_PCIIO_ops = {
  67     .read = ppc_pci_io_read,
  68     .write = ppc_pci_io_write,
  69     .endianness = DEVICE_LITTLE_ENDIAN,
  70 };
  71
  72 static uint64_t ppc_intack_read(void *opaque, target_phys_addr_t addr,
  73                                 unsigned int size)
  74 {
  75     return pic_read_irq(isa_pic);
  76 }
  77
  78 static const MemoryRegionOps PPC_intack_ops = {
  79     .read = ppc_intack_read,
  80     .valid = {
  81         .max_access_size = 1,
  82     },
  83 };
  84
  85 static int prep_map_irq(PCIDevice *pci_dev, int irq_num)
  86 {
  87     return (irq_num + (pci_dev->devfn >> 3)) & 1;
  88 }
  89
  90 static void prep_set_irq(void *opaque, int irq_num, int level)
  91 {
  92     qemu_irq *pic = opaque;
  93
  94     qemu_set_irq(pic[irq_num] , level);
  95 }
  96
  97 static int raven_pcihost_init(SysBusDevice *dev)
  98 {
  99     PCIHostState *h = FROM_SYSBUS(PCIHostState, dev);
 100     PREPPCIState *s = DO_UPCAST(PREPPCIState, host_state, h);
 101     MemoryRegion *address_space_mem = get_system_memory();
 102     MemoryRegion *address_space_io = get_system_io();
 103     PCIBus *bus;
 104     int i;
 105
 106     for (i = 0; i < 4; i++) {
 107         sysbus_init_irq(dev, &s->irq[i]);
 108     }
 109
 110     bus = pci_register_bus(&h->busdev.qdev, NULL,
 111                            prep_set_irq, prep_map_irq, s->irq,
 112                            address_space_mem, address_space_io, 0, 4);
 113     h->bus = bus;
 114
 115     memory_region_init_io(&h->conf_mem, &pci_host_conf_be_ops, s,
 116                           "pci-conf-idx", 1);
 117     sysbus_add_io(dev, 0xcf8, &h->conf_mem);
 118     sysbus_init_ioports(&h->busdev, 0xcf8, 1);
 119
 120     memory_region_init_io(&h->data_mem, &pci_host_data_be_ops, s,
 121                           "pci-conf-data", 1);
 122     sysbus_add_io(dev, 0xcfc, &h->data_mem);
 123     sysbus_init_ioports(&h->busdev, 0xcfc, 1);
 124
 125     memory_region_init_io(&h->mmcfg, &PPC_PCIIO_ops, s, "pciio", 0x00400000);
 126     memory_region_add_subregion(address_space_mem, 0x80800000, &h->mmcfg);
 127
 128     memory_region_init_io(&s->intack, &PPC_intack_ops, s, "pci-intack", 1);
 129     memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->intack);
 130     pci_create_simple(bus, 0, "raven");
 131
 132     return 0;
 133 }
 134
 135 static int raven_init(PCIDevice *d)
 136 {
 137     d->config[0x0C] = 0x08; // cache_line_size
 138     d->config[0x0D] = 0x10; // latency_timer
 139     d->config[0x34] = 0x00; // capabilities_pointer
 140
 141     return 0;
 142 }
 143
 144 static const VMStateDescription vmstate_raven = {
 145     .name = "raven",
 146     .version_id = 0,
 147     .minimum_version_id = 0,
 148     .fields = (VMStateField[]) {
 149         VMSTATE_PCI_DEVICE(dev, RavenPCIState),
 150         VMSTATE_END_OF_LIST()
 151     },
 152 };
 153
 154 static void raven_class_init(ObjectClass *klass, void *data)
 155 {
 156     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 157     DeviceClass *dc = DEVICE_CLASS(klass);
 158
 159     k->init = raven_init;
 160     k->vendor_id = PCI_VENDOR_ID_MOTOROLA;
 161     k->device_id = PCI_DEVICE_ID_MOTOROLA_RAVEN;
 162     k->revision = 0x00;
 163     k->class_id = PCI_CLASS_BRIDGE_HOST;
 164     dc->desc = "PReP Host Bridge - Motorola Raven";
 165     dc->vmsd = &vmstate_raven;
 166     dc->no_user = 1;
 167 }
 168
 169 static TypeInfo raven_info = {
 170     .name = "raven",
 171     .parent = TYPE_PCI_DEVICE,
 172     .instance_size = sizeof(RavenPCIState),
 173     .class_init = raven_class_init,
 174 };
 175
 176 static void raven_pcihost_class_init(ObjectClass *klass, void *data)
 177 {
 178     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 179     DeviceClass *dc = DEVICE_CLASS(klass);
 180
 181     k->init = raven_pcihost_init;
 182     dc->fw_name = "pci";
 183     dc->no_user = 1;
 184 }
 185
 186 static TypeInfo raven_pcihost_info = {
 187     .name = "raven-pcihost",
 188     .parent = TYPE_SYS_BUS_DEVICE,
 189     .instance_size = sizeof(PREPPCIState),
 190     .class_init = raven_pcihost_class_init,
 191 };
 192
 193 static void raven_register_types(void)
 194 {
 195     type_register_static(&raven_pcihost_info);
 196     type_register_static(&raven_info);
 197 }
 198
 199 type_init(raven_register_types)