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