hw/pci-host/raven.c

   1 /*
   2  * QEMU PREP PCI host
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  * Copyright (c) 2011-2013 Andreas Färber
   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 "qemu/osdep.h"
  27 #include "qemu-common.h"
  28 #include "qemu/datadir.h"
  29 #include "qemu/units.h"
  30 #include "qemu/log.h"
  31 #include "qapi/error.h"
  32 #include "hw/pci/pci.h"
  33 #include "hw/pci/pci_bus.h"
  34 #include "hw/pci/pci_host.h"
  35 #include "hw/qdev-properties.h"
  36 #include "migration/vmstate.h"
  37 #include "hw/intc/i8259.h"
  38 #include "hw/irq.h"
  39 #include "hw/loader.h"
  40 #include "hw/or-irq.h"
  41 #include "elf.h"
  42 #include "qom/object.h"
  43
  44 #define TYPE_RAVEN_PCI_DEVICE "raven"
  45 #define TYPE_RAVEN_PCI_HOST_BRIDGE "raven-pcihost"
  46
  47 OBJECT_DECLARE_SIMPLE_TYPE(RavenPCIState, RAVEN_PCI_DEVICE)
  48
  49 struct RavenPCIState {
  50     PCIDevice dev;
  51
  52     uint32_t elf_machine;
  53     char *bios_name;
  54     MemoryRegion bios;
  55 };
  56
  57 typedef struct PRePPCIState PREPPCIState;
  58 DECLARE_INSTANCE_CHECKER(PREPPCIState, RAVEN_PCI_HOST_BRIDGE,
  59                          TYPE_RAVEN_PCI_HOST_BRIDGE)
  60
  61 struct PRePPCIState {
  62     PCIHostState parent_obj;
  63
  64     qemu_or_irq *or_irq;
  65     qemu_irq pci_irqs[PCI_NUM_PINS];
  66     PCIBus pci_bus;
  67     AddressSpace pci_io_as;
  68     MemoryRegion pci_io;
  69     MemoryRegion pci_io_non_contiguous;
  70     MemoryRegion pci_memory;
  71     MemoryRegion pci_intack;
  72     MemoryRegion bm;
  73     MemoryRegion bm_ram_alias;
  74     MemoryRegion bm_pci_memory_alias;
  75     AddressSpace bm_as;
  76     RavenPCIState pci_dev;
  77
  78     int contiguous_map;
  79     bool is_legacy_prep;
  80 };
  81
  82 #define BIOS_SIZE (1 * MiB)
  83
  84 #define PCI_IO_BASE_ADDR    0x80000000  /* Physical address on main bus */
  85
  86 static inline uint32_t raven_pci_io_config(hwaddr addr)
  87 {
  88     int i;
  89
  90     for (i = 0; i < 11; i++) {
  91         if ((addr & (1 << (11 + i))) != 0) {
  92             break;
  93         }
  94     }
  95     return (addr & 0x7ff) |  (i << 11);
  96 }
  97
  98 static void raven_pci_io_write(void *opaque, hwaddr addr,
  99                                uint64_t val, unsigned int size)
 100 {
 101     PREPPCIState *s = opaque;
 102     PCIHostState *phb = PCI_HOST_BRIDGE(s);
 103     pci_data_write(phb->bus, raven_pci_io_config(addr), val, size);
 104 }
 105
 106 static uint64_t raven_pci_io_read(void *opaque, hwaddr addr,
 107                                   unsigned int size)
 108 {
 109     PREPPCIState *s = opaque;
 110     PCIHostState *phb = PCI_HOST_BRIDGE(s);
 111     return pci_data_read(phb->bus, raven_pci_io_config(addr), size);
 112 }
 113
 114 static const MemoryRegionOps raven_pci_io_ops = {
 115     .read = raven_pci_io_read,
 116     .write = raven_pci_io_write,
 117     .endianness = DEVICE_LITTLE_ENDIAN,
 118 };
 119
 120 static uint64_t raven_intack_read(void *opaque, hwaddr addr,
 121                                   unsigned int size)
 122 {
 123     return pic_read_irq(isa_pic);
 124 }
 125
 126 static void raven_intack_write(void *opaque, hwaddr addr,
 127                                         uint64_t data, unsigned size)
 128 {
 129     qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__);
 130 }
 131
 132 static const MemoryRegionOps raven_intack_ops = {
 133     .read = raven_intack_read,
 134     .write = raven_intack_write,
 135     .valid = {
 136         .max_access_size = 1,
 137     },
 138 };
 139
 140 static inline hwaddr raven_io_address(PREPPCIState *s,
 141                                       hwaddr addr)
 142 {
 143     if (s->contiguous_map == 0) {
 144         /* 64 KB contiguous space for IOs */
 145         addr &= 0xFFFF;
 146     } else {
 147         /* 8 MB non-contiguous space for IOs */
 148         addr = (addr & 0x1F) | ((addr & 0x007FFF000) >> 7);
 149     }
 150
 151     /* FIXME: handle endianness switch */
 152
 153     return addr;
 154 }
 155
 156 static uint64_t raven_io_read(void *opaque, hwaddr addr,
 157                               unsigned int size)
 158 {
 159     PREPPCIState *s = opaque;
 160     uint8_t buf[4];
 161
 162     addr = raven_io_address(s, addr);
 163     address_space_read(&s->pci_io_as, addr + PCI_IO_BASE_ADDR,
 164                        MEMTXATTRS_UNSPECIFIED, buf, size);
 165
 166     if (size == 1) {
 167         return buf[0];
 168     } else if (size == 2) {
 169         return lduw_le_p(buf);
 170     } else if (size == 4) {
 171         return ldl_le_p(buf);
 172     } else {
 173         g_assert_not_reached();
 174     }
 175 }
 176
 177 static void raven_io_write(void *opaque, hwaddr addr,
 178                            uint64_t val, unsigned int size)
 179 {
 180     PREPPCIState *s = opaque;
 181     uint8_t buf[4];
 182
 183     addr = raven_io_address(s, addr);
 184
 185     if (size == 1) {
 186         buf[0] = val;
 187     } else if (size == 2) {
 188         stw_le_p(buf, val);
 189     } else if (size == 4) {
 190         stl_le_p(buf, val);
 191     } else {
 192         g_assert_not_reached();
 193     }
 194
 195     address_space_write(&s->pci_io_as, addr + PCI_IO_BASE_ADDR,
 196                         MEMTXATTRS_UNSPECIFIED, buf, size);
 197 }
 198
 199 static const MemoryRegionOps raven_io_ops = {
 200     .read = raven_io_read,
 201     .write = raven_io_write,
 202     .endianness = DEVICE_LITTLE_ENDIAN,
 203     .impl.max_access_size = 4,
 204     .valid.unaligned = true,
 205 };
 206
 207 static int raven_map_irq(PCIDevice *pci_dev, int irq_num)
 208 {
 209     return (irq_num + (pci_dev->devfn >> 3)) & 1;
 210 }
 211
 212 static void raven_set_irq(void *opaque, int irq_num, int level)
 213 {
 214     PREPPCIState *s = opaque;
 215
 216     qemu_set_irq(s->pci_irqs[irq_num], level);
 217 }
 218
 219 static AddressSpace *raven_pcihost_set_iommu(PCIBus *bus, void *opaque,
 220                                              int devfn)
 221 {
 222     PREPPCIState *s = opaque;
 223
 224     return &s->bm_as;
 225 }
 226
 227 static void raven_change_gpio(void *opaque, int n, int level)
 228 {
 229     PREPPCIState *s = opaque;
 230
 231     s->contiguous_map = level;
 232 }
 233
 234 static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
 235 {
 236     SysBusDevice *dev = SYS_BUS_DEVICE(d);
 237     PCIHostState *h = PCI_HOST_BRIDGE(dev);
 238     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(dev);
 239     MemoryRegion *address_space_mem = get_system_memory();
 240     int i;
 241
 242     if (s->is_legacy_prep) {
 243         for (i = 0; i < PCI_NUM_PINS; i++) {
 244             sysbus_init_irq(dev, &s->pci_irqs[i]);
 245         }
 246     } else {
 247         /* According to PReP specification section 6.1.6 "System Interrupt
 248          * Assignments", all PCI interrupts are routed via IRQ 15 */
 249         s->or_irq = OR_IRQ(object_new(TYPE_OR_IRQ));
 250         object_property_set_int(OBJECT(s->or_irq), "num-lines", PCI_NUM_PINS,
 251                                 &error_fatal);
 252         qdev_realize(DEVICE(s->or_irq), NULL, &error_fatal);
 253         sysbus_init_irq(dev, &s->or_irq->out_irq);
 254
 255         for (i = 0; i < PCI_NUM_PINS; i++) {
 256             s->pci_irqs[i] = qdev_get_gpio_in(DEVICE(s->or_irq), i);
 257         }
 258     }
 259
 260     qdev_init_gpio_in(d, raven_change_gpio, 1);
 261
 262     pci_bus_irqs(&s->pci_bus, raven_set_irq, raven_map_irq, s, PCI_NUM_PINS);
 263
 264     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops, s,
 265                           "pci-conf-idx", 4);
 266     memory_region_add_subregion(&s->pci_io, 0xcf8, &h->conf_mem);
 267
 268     memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops, s,
 269                           "pci-conf-data", 4);
 270     memory_region_add_subregion(&s->pci_io, 0xcfc, &h->data_mem);
 271
 272     memory_region_init_io(&h->mmcfg, OBJECT(s), &raven_pci_io_ops, s,
 273                           "pciio", 0x00400000);
 274     memory_region_add_subregion(address_space_mem, 0x80800000, &h->mmcfg);
 275
 276     memory_region_init_io(&s->pci_intack, OBJECT(s), &raven_intack_ops, s,
 277                           "pci-intack", 1);
 278     memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->pci_intack);
 279
 280     /* TODO Remove once realize propagates to child devices. */
 281     qdev_realize(DEVICE(&s->pci_dev), BUS(&s->pci_bus), errp);
 282 }
 283
 284 static void raven_pcihost_initfn(Object *obj)
 285 {
 286     PCIHostState *h = PCI_HOST_BRIDGE(obj);
 287     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
 288     MemoryRegion *address_space_mem = get_system_memory();
 289     DeviceState *pci_dev;
 290
 291     memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
 292     memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, s,
 293                           "pci-io-non-contiguous", 0x00800000);
 294     memory_region_init(&s->pci_memory, obj, "pci-memory", 0x3f000000);
 295     address_space_init(&s->pci_io_as, &s->pci_io, "raven-io");
 296
 297     /* CPU address space */
 298     memory_region_add_subregion(address_space_mem, PCI_IO_BASE_ADDR,
 299                                 &s->pci_io);
 300     memory_region_add_subregion_overlap(address_space_mem, PCI_IO_BASE_ADDR,
 301                                         &s->pci_io_non_contiguous, 1);
 302     memory_region_add_subregion(address_space_mem, 0xc0000000, &s->pci_memory);
 303     pci_root_bus_new_inplace(&s->pci_bus, sizeof(s->pci_bus), DEVICE(obj), NULL,
 304                              &s->pci_memory, &s->pci_io, 0, TYPE_PCI_BUS);
 305
 306     /* Bus master address space */
 307     memory_region_init(&s->bm, obj, "bm-raven", 4 * GiB);
 308     memory_region_init_alias(&s->bm_pci_memory_alias, obj, "bm-pci-memory",
 309                              &s->pci_memory, 0,
 310                              memory_region_size(&s->pci_memory));
 311     memory_region_init_alias(&s->bm_ram_alias, obj, "bm-system",
 312                              get_system_memory(), 0, 0x80000000);
 313     memory_region_add_subregion(&s->bm, 0         , &s->bm_pci_memory_alias);
 314     memory_region_add_subregion(&s->bm, 0x80000000, &s->bm_ram_alias);
 315     address_space_init(&s->bm_as, &s->bm, "raven-bm");
 316     pci_setup_iommu(&s->pci_bus, raven_pcihost_set_iommu, s);
 317
 318     h->bus = &s->pci_bus;
 319
 320     object_initialize(&s->pci_dev, sizeof(s->pci_dev), TYPE_RAVEN_PCI_DEVICE);
 321     pci_dev = DEVICE(&s->pci_dev);
 322     object_property_set_int(OBJECT(&s->pci_dev), "addr", PCI_DEVFN(0, 0),
 323                             NULL);
 324     qdev_prop_set_bit(pci_dev, "multifunction", false);
 325 }
 326
 327 static void raven_realize(PCIDevice *d, Error **errp)
 328 {
 329     RavenPCIState *s = RAVEN_PCI_DEVICE(d);
 330     char *filename;
 331     int bios_size = -1;
 332
 333     d->config[0x0C] = 0x08; // cache_line_size
 334     d->config[0x0D] = 0x10; // latency_timer
 335     d->config[0x34] = 0x00; // capabilities_pointer
 336
 337     memory_region_init_rom_nomigrate(&s->bios, OBJECT(s), "bios", BIOS_SIZE,
 338                                      &error_fatal);
 339     memory_region_add_subregion(get_system_memory(), (uint32_t)(-BIOS_SIZE),
 340                                 &s->bios);
 341     if (s->bios_name) {
 342         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, s->bios_name);
 343         if (filename) {
 344             if (s->elf_machine != EM_NONE) {
 345                 bios_size = load_elf(filename, NULL, NULL, NULL, NULL,
 346                                      NULL, NULL, NULL, 1, s->elf_machine,
 347                                      0, 0);
 348             }
 349             if (bios_size < 0) {
 350                 bios_size = get_image_size(filename);
 351                 if (bios_size > 0 && bios_size <= BIOS_SIZE) {
 352                     hwaddr bios_addr;
 353                     bios_size = (bios_size + 0xfff) & ~0xfff;
 354                     bios_addr = (uint32_t)(-BIOS_SIZE);
 355                     bios_size = load_image_targphys(filename, bios_addr,
 356                                                     bios_size);
 357                 }
 358             }
 359         }
 360         g_free(filename);
 361         if (bios_size < 0 || bios_size > BIOS_SIZE) {
 362             memory_region_del_subregion(get_system_memory(), &s->bios);
 363             error_setg(errp, "Could not load bios image '%s'", s->bios_name);
 364             return;
 365         }
 366     }
 367
 368     vmstate_register_ram_global(&s->bios);
 369 }
 370
 371 static const VMStateDescription vmstate_raven = {
 372     .name = "raven",
 373     .version_id = 0,
 374     .minimum_version_id = 0,
 375     .fields = (VMStateField[]) {
 376         VMSTATE_PCI_DEVICE(dev, RavenPCIState),
 377         VMSTATE_END_OF_LIST()
 378     },
 379 };
 380
 381 static void raven_class_init(ObjectClass *klass, void *data)
 382 {
 383     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 384     DeviceClass *dc = DEVICE_CLASS(klass);
 385
 386     k->realize = raven_realize;
 387     k->vendor_id = PCI_VENDOR_ID_MOTOROLA;
 388     k->device_id = PCI_DEVICE_ID_MOTOROLA_RAVEN;
 389     k->revision = 0x00;
 390     k->class_id = PCI_CLASS_BRIDGE_HOST;
 391     dc->desc = "PReP Host Bridge - Motorola Raven";
 392     dc->vmsd = &vmstate_raven;
 393     /*
 394      * Reason: PCI-facing part of the host bridge, not usable without
 395      * the host-facing part, which can't be device_add'ed, yet.
 396      */
 397     dc->user_creatable = false;
 398 }
 399
 400 static const TypeInfo raven_info = {
 401     .name = TYPE_RAVEN_PCI_DEVICE,
 402     .parent = TYPE_PCI_DEVICE,
 403     .instance_size = sizeof(RavenPCIState),
 404     .class_init = raven_class_init,
 405     .interfaces = (InterfaceInfo[]) {
 406         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 407         { },
 408     },
 409 };
 410
 411 static Property raven_pcihost_properties[] = {
 412     DEFINE_PROP_UINT32("elf-machine", PREPPCIState, pci_dev.elf_machine,
 413                        EM_NONE),
 414     DEFINE_PROP_STRING("bios-name", PREPPCIState, pci_dev.bios_name),
 415     /* Temporary workaround until legacy prep machine is removed */
 416     DEFINE_PROP_BOOL("is-legacy-prep", PREPPCIState, is_legacy_prep,
 417                      false),
 418     DEFINE_PROP_END_OF_LIST()
 419 };
 420
 421 static void raven_pcihost_class_init(ObjectClass *klass, void *data)
 422 {
 423     DeviceClass *dc = DEVICE_CLASS(klass);
 424
 425     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 426     dc->realize = raven_pcihost_realizefn;
 427     device_class_set_props(dc, raven_pcihost_properties);
 428     dc->fw_name = "pci";
 429 }
 430
 431 static const TypeInfo raven_pcihost_info = {
 432     .name = TYPE_RAVEN_PCI_HOST_BRIDGE,
 433     .parent = TYPE_PCI_HOST_BRIDGE,
 434     .instance_size = sizeof(PREPPCIState),
 435     .instance_init = raven_pcihost_initfn,
 436     .class_init = raven_pcihost_class_init,
 437 };
 438
 439 static void raven_register_types(void)
 440 {
 441     type_register_static(&raven_pcihost_info);
 442     type_register_static(&raven_info);
 443 }
 444
 445 type_init(raven_register_types)