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_init(&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) 446