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