hw/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 #include "sysbus.h"
  25 #include "sh.h"
  26 #include "pci.h"
  27 #include "pci_host.h"
  28 #include "bswap.h"
  29 #include "exec-memory.h"
  30
  31 typedef struct SHPCIState {
  32     SysBusDevice busdev;
  33     PCIBus *bus;
  34     PCIDevice *dev;
  35     qemu_irq irq[4];
  36     MemoryRegion memconfig_p4;
  37     MemoryRegion memconfig_a7;
  38     MemoryRegion isa;
  39     uint32_t par;
  40     uint32_t mbr;
  41     uint32_t iobr;
  42 } SHPCIState;
  43
  44 static void sh_pci_reg_write (void *p, target_phys_addr_t addr, uint64_t val,
  45                               unsigned size)
  46 {
  47     SHPCIState *pcic = p;
  48     switch(addr) {
  49     case 0 ... 0xfc:
  50         cpu_to_le32w((uint32_t*)(pcic->dev->config + addr), val);
  51         break;
  52     case 0x1c0:
  53         pcic->par = val;
  54         break;
  55     case 0x1c4:
  56         pcic->mbr = val & 0xff000001;
  57         break;
  58     case 0x1c8:
  59         if ((val & 0xfffc0000) != (pcic->iobr & 0xfffc0000)) {
  60             memory_region_del_subregion(get_system_memory(), &pcic->isa);
  61             pcic->iobr = val & 0xfffc0001;
  62             memory_region_add_subregion(get_system_memory(),
  63                                         pcic->iobr & 0xfffc0000, &pcic->isa);
  64         }
  65         break;
  66     case 0x220:
  67         pci_data_write(pcic->bus, pcic->par, val, 4);
  68         break;
  69     }
  70 }
  71
  72 static uint64_t sh_pci_reg_read (void *p, target_phys_addr_t addr,
  73                                  unsigned size)
  74 {
  75     SHPCIState *pcic = p;
  76     switch(addr) {
  77     case 0 ... 0xfc:
  78         return le32_to_cpup((uint32_t*)(pcic->dev->config + addr));
  79     case 0x1c0:
  80         return pcic->par;
  81     case 0x1c4:
  82         return pcic->mbr;
  83     case 0x1c8:
  84         return pcic->iobr;
  85     case 0x220:
  86         return pci_data_read(pcic->bus, pcic->par, 4);
  87     }
  88     return 0;
  89 }
  90
  91 static const MemoryRegionOps sh_pci_reg_ops = {
  92     .read = sh_pci_reg_read,
  93     .write = sh_pci_reg_write,
  94     .endianness = DEVICE_NATIVE_ENDIAN,
  95     .valid = {
  96         .min_access_size = 4,
  97         .max_access_size = 4,
  98     },
  99 };
 100
 101 static int sh_pci_map_irq(PCIDevice *d, int irq_num)
 102 {
 103     return (d->devfn >> 3);
 104 }
 105
 106 static void sh_pci_set_irq(void *opaque, int irq_num, int level)
 107 {
 108     qemu_irq *pic = opaque;
 109
 110     qemu_set_irq(pic[irq_num], level);
 111 }
 112
 113 static void sh_pci_map(SysBusDevice *dev, target_phys_addr_t base)
 114 {
 115     SHPCIState *s = FROM_SYSBUS(SHPCIState, dev);
 116
 117     memory_region_add_subregion(get_system_memory(),
 118                                 P4ADDR(base),
 119                                 &s->memconfig_p4);
 120     memory_region_add_subregion(get_system_memory(),
 121                                 A7ADDR(base),
 122                                 &s->memconfig_a7);
 123     s->iobr = 0xfe240000;
 124     memory_region_add_subregion(get_system_memory(), s->iobr, &s->isa);
 125 }
 126
 127 static void sh_pci_unmap(SysBusDevice *dev, target_phys_addr_t base)
 128 {
 129     SHPCIState *s = FROM_SYSBUS(SHPCIState, dev);
 130
 131     memory_region_del_subregion(get_system_memory(), &s->memconfig_p4);
 132     memory_region_del_subregion(get_system_memory(), &s->memconfig_a7);
 133     memory_region_del_subregion(get_system_memory(), &s->isa);
 134 }
 135
 136 static int sh_pci_init_device(SysBusDevice *dev)
 137 {
 138     SHPCIState *s;
 139     int i;
 140
 141     s = FROM_SYSBUS(SHPCIState, dev);
 142     for (i = 0; i < 4; i++) {
 143         sysbus_init_irq(dev, &s->irq[i]);
 144     }
 145     s->bus = pci_register_bus(&s->busdev.qdev, "pci",
 146                               sh_pci_set_irq, sh_pci_map_irq,
 147                               s->irq,
 148                               get_system_memory(),
 149                               get_system_io(),
 150                               PCI_DEVFN(0, 0), 4);
 151     memory_region_init_io(&s->memconfig_p4, &sh_pci_reg_ops, s,
 152                           "sh_pci", 0x224);
 153     memory_region_init_alias(&s->memconfig_a7, "sh_pci.2", &s->memconfig_a7,
 154                              0, 0x224);
 155     isa_mmio_setup(&s->isa, 0x40000);
 156     sysbus_init_mmio_cb2(dev, sh_pci_map, sh_pci_unmap);
 157     sysbus_init_mmio_region(dev, &s->memconfig_a7);
 158     sysbus_init_mmio_region(dev, &s->isa);
 159     s->dev = pci_create_simple(s->bus, PCI_DEVFN(0, 0), "sh_pci_host");
 160     return 0;
 161 }
 162
 163 static int sh_pci_host_init(PCIDevice *d)
 164 {
 165     pci_set_word(d->config + PCI_COMMAND, PCI_COMMAND_WAIT);
 166     pci_set_word(d->config + PCI_STATUS, PCI_STATUS_CAP_LIST |
 167                  PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM);
 168     return 0;
 169 }
 170
 171 static PCIDeviceInfo sh_pci_host_info = {
 172     .qdev.name = "sh_pci_host",
 173     .qdev.size = sizeof(PCIDevice),
 174     .init      = sh_pci_host_init,
 175     .vendor_id = PCI_VENDOR_ID_HITACHI,
 176     .device_id = PCI_DEVICE_ID_HITACHI_SH7751R,
 177 };
 178
 179 static void sh_pci_register_devices(void)
 180 {
 181     sysbus_register_dev("sh_pci", sizeof(SHPCIState),
 182                         sh_pci_init_device);
 183     pci_qdev_register(&sh_pci_host_info);
 184 }
 185
 186 device_init(sh_pci_register_devices)