hw/sh4/sh_pci.c

   1 /*
   2  * SuperH on-chip PCIC emulation.
   3  *
   4  * Copyright (c) 2008 Takashi YOSHII
   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 "qemu/osdep.h"
  26 #include "hw/sysbus.h"
  27 #include "hw/sh4/sh.h"
  28 #include "hw/pci/pci.h"
  29 #include "hw/pci/pci_host.h"
  30 #include "qemu/bswap.h"
  31 #include "qemu/module.h"
  32 #include "exec/address-spaces.h"
  33
  34 #define TYPE_SH_PCI_HOST_BRIDGE "sh_pci"
  35
  36 #define SH_PCI_HOST_BRIDGE(obj) \
  37     OBJECT_CHECK(SHPCIState, (obj), TYPE_SH_PCI_HOST_BRIDGE)
  38
  39 typedef struct SHPCIState {
  40     PCIHostState parent_obj;
  41
  42     PCIDevice *dev;
  43     qemu_irq irq[4];
  44     MemoryRegion memconfig_p4;
  45     MemoryRegion memconfig_a7;
  46     MemoryRegion isa;
  47     uint32_t par;
  48     uint32_t mbr;
  49     uint32_t iobr;
  50 } SHPCIState;
  51
  52 static void sh_pci_reg_write (void *p, hwaddr addr, uint64_t val,
  53                               unsigned size)
  54 {
  55     SHPCIState *pcic = p;
  56     PCIHostState *phb = PCI_HOST_BRIDGE(pcic);
  57
  58     switch(addr) {
  59     case 0 ... 0xfc:
  60         stl_le_p(pcic->dev->config + addr, val);
  61         break;
  62     case 0x1c0:
  63         pcic->par = val;
  64         break;
  65     case 0x1c4:
  66         pcic->mbr = val & 0xff000001;
  67         break;
  68     case 0x1c8:
  69         if ((val & 0xfffc0000) != (pcic->iobr & 0xfffc0000)) {
  70             memory_region_del_subregion(get_system_memory(), &pcic->isa);
  71             pcic->iobr = val & 0xfffc0001;
  72             memory_region_add_subregion(get_system_memory(),
  73                                         pcic->iobr & 0xfffc0000, &pcic->isa);
  74         }
  75         break;
  76     case 0x220:
  77         pci_data_write(phb->bus, pcic->par, val, 4);
  78         break;
  79     }
  80 }
  81
  82 static uint64_t sh_pci_reg_read (void *p, hwaddr addr,
  83                                  unsigned size)
  84 {
  85     SHPCIState *pcic = p;
  86     PCIHostState *phb = PCI_HOST_BRIDGE(pcic);
  87
  88     switch(addr) {
  89     case 0 ... 0xfc:
  90         return ldl_le_p(pcic->dev->config + addr);
  91     case 0x1c0:
  92         return pcic->par;
  93     case 0x1c4:
  94         return pcic->mbr;
  95     case 0x1c8:
  96         return pcic->iobr;
  97     case 0x220:
  98         return pci_data_read(phb->bus, pcic->par, 4);
  99     }
 100     return 0;
 101 }
 102
 103 static const MemoryRegionOps sh_pci_reg_ops = {
 104     .read = sh_pci_reg_read,
 105     .write = sh_pci_reg_write,
 106     .endianness = DEVICE_NATIVE_ENDIAN,
 107     .valid = {
 108         .min_access_size = 4,
 109         .max_access_size = 4,
 110     },
 111 };
 112
 113 static int sh_pci_map_irq(PCIDevice *d, int irq_num)
 114 {
 115     return (d->devfn >> 3);
 116 }
 117
 118 static void sh_pci_set_irq(void *opaque, int irq_num, int level)
 119 {
 120     qemu_irq *pic = opaque;
 121
 122     qemu_set_irq(pic[irq_num], level);
 123 }
 124
 125 static void sh_pci_device_realize(DeviceState *dev, Error **errp)
 126 {
 127     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 128     SHPCIState *s = SH_PCI_HOST_BRIDGE(dev);
 129     PCIHostState *phb = PCI_HOST_BRIDGE(s);
 130     int i;
 131
 132     for (i = 0; i < 4; i++) {
 133         sysbus_init_irq(sbd, &s->irq[i]);
 134     }
 135     phb->bus = pci_register_root_bus(DEVICE(dev), "pci",
 136                                      sh_pci_set_irq, sh_pci_map_irq,
 137                                      s->irq,
 138                                      get_system_memory(),
 139                                      get_system_io(),
 140                                      PCI_DEVFN(0, 0), 4, TYPE_PCI_BUS);
 141     memory_region_init_io(&s->memconfig_p4, OBJECT(s), &sh_pci_reg_ops, s,
 142                           "sh_pci", 0x224);
 143     memory_region_init_alias(&s->memconfig_a7, OBJECT(s), "sh_pci.2",
 144                              &s->memconfig_p4, 0, 0x224);
 145     memory_region_init_alias(&s->isa, OBJECT(s), "sh_pci.isa",
 146                              get_system_io(), 0, 0x40000);
 147     sysbus_init_mmio(sbd, &s->memconfig_p4);
 148     sysbus_init_mmio(sbd, &s->memconfig_a7);
 149     s->iobr = 0xfe240000;
 150     memory_region_add_subregion(get_system_memory(), s->iobr, &s->isa);
 151
 152     s->dev = pci_create_simple(phb->bus, PCI_DEVFN(0, 0), "sh_pci_host");
 153 }
 154
 155 static void sh_pci_host_realize(PCIDevice *d, Error **errp)
 156 {
 157     pci_set_word(d->config + PCI_COMMAND, PCI_COMMAND_WAIT);
 158     pci_set_word(d->config + PCI_STATUS, PCI_STATUS_CAP_LIST |
 159                  PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM);
 160 }
 161
 162 static void sh_pci_host_class_init(ObjectClass *klass, void *data)
 163 {
 164     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 165     DeviceClass *dc = DEVICE_CLASS(klass);
 166
 167     k->realize = sh_pci_host_realize;
 168     k->vendor_id = PCI_VENDOR_ID_HITACHI;
 169     k->device_id = PCI_DEVICE_ID_HITACHI_SH7751R;
 170     /*
 171      * PCI-facing part of the host bridge, not usable without the
 172      * host-facing part, which can't be device_add'ed, yet.
 173      */
 174     dc->user_creatable = false;
 175 }
 176
 177 static const TypeInfo sh_pci_host_info = {
 178     .name          = "sh_pci_host",
 179     .parent        = TYPE_PCI_DEVICE,
 180     .instance_size = sizeof(PCIDevice),
 181     .class_init    = sh_pci_host_class_init,
 182     .interfaces = (InterfaceInfo[]) {
 183         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 184         { },
 185     },
 186 };
 187
 188 static void sh_pci_device_class_init(ObjectClass *klass, void *data)
 189 {
 190     DeviceClass *dc = DEVICE_CLASS(klass);
 191
 192     dc->realize = sh_pci_device_realize;
 193 }
 194
 195 static const TypeInfo sh_pci_device_info = {
 196     .name          = TYPE_SH_PCI_HOST_BRIDGE,
 197     .parent        = TYPE_PCI_HOST_BRIDGE,
 198     .instance_size = sizeof(SHPCIState),
 199     .class_init    = sh_pci_device_class_init,
 200 };
 201
 202 static void sh_pci_register_types(void)
 203 {
 204     type_register_static(&sh_pci_device_info);
 205     type_register_static(&sh_pci_host_info);
 206 }
 207
 208 type_init(sh_pci_register_types)