hw/apb_pci.c

   1 /*
   2  * QEMU Ultrasparc APB PCI host
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   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 /* XXX This file and most of its contents are somewhat misnamed.  The
  26    Ultrasparc PCI host is called the PCI Bus Module (PBM).  The APB is
  27    the secondary PCI bridge.  */
  28
  29 #include "sysbus.h"
  30 #include "pci.h"
  31 #include "pci_host.h"
  32 #include "pci_bridge.h"
  33 #include "pci_internals.h"
  34 #include "apb_pci.h"
  35 #include "sysemu.h"
  36 #include "exec-memory.h"
  37
  38 /* debug APB */
  39 //#define DEBUG_APB
  40
  41 #ifdef DEBUG_APB
  42 #define APB_DPRINTF(fmt, ...) \
  43 do { printf("APB: " fmt , ## __VA_ARGS__); } while (0)
  44 #else
  45 #define APB_DPRINTF(fmt, ...)
  46 #endif
  47
  48 /*
  49  * Chipset docs:
  50  * PBM: "UltraSPARC IIi User's Manual",
  51  * http://www.sun.com/processors/manuals/805-0087.pdf
  52  *
  53  * APB: "Advanced PCI Bridge (APB) User's Manual",
  54  * http://www.sun.com/processors/manuals/805-1251.pdf
  55  */
  56
  57 #define PBM_PCI_IMR_MASK    0x7fffffff
  58 #define PBM_PCI_IMR_ENABLED 0x80000000
  59
  60 #define POR          (1 << 31)
  61 #define SOFT_POR     (1 << 30)
  62 #define SOFT_XIR     (1 << 29)
  63 #define BTN_POR      (1 << 28)
  64 #define BTN_XIR      (1 << 27)
  65 #define RESET_MASK   0xf8000000
  66 #define RESET_WCMASK 0x98000000
  67 #define RESET_WMASK  0x60000000
  68
  69 typedef struct APBState {
  70     SysBusDevice busdev;
  71     PCIBus      *bus;
  72     MemoryRegion apb_config;
  73     MemoryRegion pci_config;
  74     MemoryRegion pci_mmio;
  75     MemoryRegion pci_ioport;
  76     uint32_t iommu[4];
  77     uint32_t pci_control[16];
  78     uint32_t pci_irq_map[8];
  79     uint32_t obio_irq_map[32];
  80     qemu_irq pci_irqs[32];
  81     uint32_t reset_control;
  82     unsigned int nr_resets;
  83 } APBState;
  84
  85 static void apb_config_writel (void *opaque, target_phys_addr_t addr,
  86                                uint64_t val, unsigned size)
  87 {
  88     APBState *s = opaque;
  89
  90     APB_DPRINTF("%s: addr " TARGET_FMT_lx " val %x\n", __func__, addr, val);
  91
  92     switch (addr & 0xffff) {
  93     case 0x30 ... 0x4f: /* DMA error registers */
  94         /* XXX: not implemented yet */
  95         break;
  96     case 0x200 ... 0x20b: /* IOMMU */
  97         s->iommu[(addr & 0xf) >> 2] = val;
  98         break;
  99     case 0x20c ... 0x3ff: /* IOMMU flush */
 100         break;
 101     case 0xc00 ... 0xc3f: /* PCI interrupt control */
 102         if (addr & 4) {
 103             s->pci_irq_map[(addr & 0x3f) >> 3] &= PBM_PCI_IMR_MASK;
 104             s->pci_irq_map[(addr & 0x3f) >> 3] |= val & ~PBM_PCI_IMR_MASK;
 105         }
 106         break;
 107     case 0x2000 ... 0x202f: /* PCI control */
 108         s->pci_control[(addr & 0x3f) >> 2] = val;
 109         break;
 110     case 0xf020 ... 0xf027: /* Reset control */
 111         if (addr & 4) {
 112             val &= RESET_MASK;
 113             s->reset_control &= ~(val & RESET_WCMASK);
 114             s->reset_control |= val & RESET_WMASK;
 115             if (val & SOFT_POR) {
 116                 s->nr_resets = 0;
 117                 qemu_system_reset_request();
 118             } else if (val & SOFT_XIR) {
 119                 qemu_system_reset_request();
 120             }
 121         }
 122         break;
 123     case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */
 124     case 0xa400 ... 0xa67f: /* IOMMU diagnostics */
 125     case 0xa800 ... 0xa80f: /* Interrupt diagnostics */
 126     case 0xf000 ... 0xf01f: /* FFB config, memory control */
 127         /* we don't care */
 128     default:
 129         break;
 130     }
 131 }
 132
 133 static uint64_t apb_config_readl (void *opaque,
 134                                   target_phys_addr_t addr, unsigned size)
 135 {
 136     APBState *s = opaque;
 137     uint32_t val;
 138
 139     switch (addr & 0xffff) {
 140     case 0x30 ... 0x4f: /* DMA error registers */
 141         val = 0;
 142         /* XXX: not implemented yet */
 143         break;
 144     case 0x200 ... 0x20b: /* IOMMU */
 145         val = s->iommu[(addr & 0xf) >> 2];
 146         break;
 147     case 0x20c ... 0x3ff: /* IOMMU flush */
 148         val = 0;
 149         break;
 150     case 0xc00 ... 0xc3f: /* PCI interrupt control */
 151         if (addr & 4) {
 152             val = s->pci_irq_map[(addr & 0x3f) >> 3];
 153         } else {
 154             val = 0;
 155         }
 156         break;
 157     case 0x2000 ... 0x202f: /* PCI control */
 158         val = s->pci_control[(addr & 0x3f) >> 2];
 159         break;
 160     case 0xf020 ... 0xf027: /* Reset control */
 161         if (addr & 4) {
 162             val = s->reset_control;
 163         } else {
 164             val = 0;
 165         }
 166         break;
 167     case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */
 168     case 0xa400 ... 0xa67f: /* IOMMU diagnostics */
 169     case 0xa800 ... 0xa80f: /* Interrupt diagnostics */
 170     case 0xf000 ... 0xf01f: /* FFB config, memory control */
 171         /* we don't care */
 172     default:
 173         val = 0;
 174         break;
 175     }
 176     APB_DPRINTF("%s: addr " TARGET_FMT_lx " -> %x\n", __func__, addr, val);
 177
 178     return val;
 179 }
 180
 181 static const MemoryRegionOps apb_config_ops = {
 182     .read = apb_config_readl,
 183     .write = apb_config_writel,
 184     .endianness = DEVICE_NATIVE_ENDIAN,
 185 };
 186
 187 static void apb_pci_config_write(void *opaque, target_phys_addr_t addr,
 188                                  uint64_t val, unsigned size)
 189 {
 190     APBState *s = opaque;
 191
 192     val = qemu_bswap_len(val, size);
 193     APB_DPRINTF("%s: addr " TARGET_FMT_lx " val %x\n", __func__, addr, val);
 194     pci_data_write(s->bus, addr, val, size);
 195 }
 196
 197 static uint64_t apb_pci_config_read(void *opaque, target_phys_addr_t addr,
 198                                     unsigned size)
 199 {
 200     uint32_t ret;
 201     APBState *s = opaque;
 202
 203     ret = pci_data_read(s->bus, addr, size);
 204     ret = qemu_bswap_len(ret, size);
 205     APB_DPRINTF("%s: addr " TARGET_FMT_lx " -> %x\n", __func__, addr, ret);
 206     return ret;
 207 }
 208
 209 static void pci_apb_iowriteb (void *opaque, target_phys_addr_t addr,
 210                                   uint32_t val)
 211 {
 212     cpu_outb(addr & IOPORTS_MASK, val);
 213 }
 214
 215 static void pci_apb_iowritew (void *opaque, target_phys_addr_t addr,
 216                                   uint32_t val)
 217 {
 218     cpu_outw(addr & IOPORTS_MASK, bswap16(val));
 219 }
 220
 221 static void pci_apb_iowritel (void *opaque, target_phys_addr_t addr,
 222                                 uint32_t val)
 223 {
 224     cpu_outl(addr & IOPORTS_MASK, bswap32(val));
 225 }
 226
 227 static uint32_t pci_apb_ioreadb (void *opaque, target_phys_addr_t addr)
 228 {
 229     uint32_t val;
 230
 231     val = cpu_inb(addr & IOPORTS_MASK);
 232     return val;
 233 }
 234
 235 static uint32_t pci_apb_ioreadw (void *opaque, target_phys_addr_t addr)
 236 {
 237     uint32_t val;
 238
 239     val = bswap16(cpu_inw(addr & IOPORTS_MASK));
 240     return val;
 241 }
 242
 243 static uint32_t pci_apb_ioreadl (void *opaque, target_phys_addr_t addr)
 244 {
 245     uint32_t val;
 246
 247     val = bswap32(cpu_inl(addr & IOPORTS_MASK));
 248     return val;
 249 }
 250
 251 static const MemoryRegionOps pci_ioport_ops = {
 252     .old_mmio = {
 253         .read = { pci_apb_ioreadb, pci_apb_ioreadw, pci_apb_ioreadl },
 254         .write = { pci_apb_iowriteb, pci_apb_iowritew, pci_apb_iowritel, },
 255     },
 256     .endianness = DEVICE_NATIVE_ENDIAN,
 257 };
 258
 259 /* The APB host has an IRQ line for each IRQ line of each slot.  */
 260 static int pci_apb_map_irq(PCIDevice *pci_dev, int irq_num)
 261 {
 262     return ((pci_dev->devfn & 0x18) >> 1) + irq_num;
 263 }
 264
 265 static int pci_pbm_map_irq(PCIDevice *pci_dev, int irq_num)
 266 {
 267     int bus_offset;
 268     if (pci_dev->devfn & 1)
 269         bus_offset = 16;
 270     else
 271         bus_offset = 0;
 272     return bus_offset + irq_num;
 273 }
 274
 275 static void pci_apb_set_irq(void *opaque, int irq_num, int level)
 276 {
 277     APBState *s = opaque;
 278
 279     /* PCI IRQ map onto the first 32 INO.  */
 280     if (irq_num < 32) {
 281         if (s->pci_irq_map[irq_num >> 2] & PBM_PCI_IMR_ENABLED) {
 282             APB_DPRINTF("%s: set irq %d level %d\n", __func__, irq_num, level);
 283             qemu_set_irq(s->pci_irqs[irq_num], level);
 284         } else {
 285             APB_DPRINTF("%s: not enabled: lower irq %d\n", __func__, irq_num);
 286             qemu_irq_lower(s->pci_irqs[irq_num]);
 287         }
 288     }
 289 }
 290
 291 static int apb_pci_bridge_initfn(PCIDevice *dev)
 292 {
 293     int rc;
 294
 295     rc = pci_bridge_initfn(dev);
 296     if (rc < 0) {
 297         return rc;
 298     }
 299
 300     /*
 301      * command register:
 302      * According to PCI bridge spec, after reset
 303      *   bus master bit is off
 304      *   memory space enable bit is off
 305      * According to manual (805-1251.pdf).
 306      *   the reset value should be zero unless the boot pin is tied high
 307      *   (which is true) and thus it should be PCI_COMMAND_MEMORY.
 308      */
 309     pci_set_word(dev->config + PCI_COMMAND,
 310                  PCI_COMMAND_MEMORY);
 311     pci_set_word(dev->config + PCI_STATUS,
 312                  PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ |
 313                  PCI_STATUS_DEVSEL_MEDIUM);
 314     return 0;
 315 }
 316
 317 PCIBus *pci_apb_init(target_phys_addr_t special_base,
 318                      target_phys_addr_t mem_base,
 319                      qemu_irq *pic, PCIBus **bus2, PCIBus **bus3)
 320 {
 321     DeviceState *dev;
 322     SysBusDevice *s;
 323     APBState *d;
 324     unsigned int i;
 325     PCIDevice *pci_dev;
 326     PCIBridge *br;
 327
 328     /* Ultrasparc PBM main bus */
 329     dev = qdev_create(NULL, "pbm");
 330     qdev_init_nofail(dev);
 331     s = sysbus_from_qdev(dev);
 332     /* apb_config */
 333     sysbus_mmio_map(s, 0, special_base);
 334     /* PCI configuration space */
 335     sysbus_mmio_map(s, 1, special_base + 0x1000000ULL);
 336     /* pci_ioport */
 337     sysbus_mmio_map(s, 2, special_base + 0x2000000ULL);
 338     d = FROM_SYSBUS(APBState, s);
 339
 340     memory_region_init(&d->pci_mmio, "pci-mmio", 0x100000000ULL);
 341     memory_region_add_subregion(get_system_memory(), mem_base, &d->pci_mmio);
 342
 343     d->bus = pci_register_bus(&d->busdev.qdev, "pci",
 344                               pci_apb_set_irq, pci_pbm_map_irq, d,
 345                               &d->pci_mmio,
 346                               get_system_io(),
 347                               0, 32);
 348
 349     for (i = 0; i < 32; i++) {
 350         sysbus_connect_irq(s, i, pic[i]);
 351     }
 352
 353     pci_create_simple(d->bus, 0, "pbm-pci");
 354
 355     /* APB secondary busses */
 356     pci_dev = pci_create_multifunction(d->bus, PCI_DEVFN(1, 0), true,
 357                                    "pbm-bridge");
 358     br = DO_UPCAST(PCIBridge, dev, pci_dev);
 359     pci_bridge_map_irq(br, "Advanced PCI Bus secondary bridge 1",
 360                        pci_apb_map_irq);
 361     qdev_init_nofail(&pci_dev->qdev);
 362     *bus2 = pci_bridge_get_sec_bus(br);
 363
 364     pci_dev = pci_create_multifunction(d->bus, PCI_DEVFN(1, 1), true,
 365                                    "pbm-bridge");
 366     br = DO_UPCAST(PCIBridge, dev, pci_dev);
 367     pci_bridge_map_irq(br, "Advanced PCI Bus secondary bridge 2",
 368                        pci_apb_map_irq);
 369     qdev_init_nofail(&pci_dev->qdev);
 370     *bus3 = pci_bridge_get_sec_bus(br);
 371
 372     return d->bus;
 373 }
 374
 375 static void pci_pbm_reset(DeviceState *d)
 376 {
 377     unsigned int i;
 378     APBState *s = container_of(d, APBState, busdev.qdev);
 379
 380     for (i = 0; i < 8; i++) {
 381         s->pci_irq_map[i] &= PBM_PCI_IMR_MASK;
 382     }
 383
 384     if (s->nr_resets++ == 0) {
 385         /* Power on reset */
 386         s->reset_control = POR;
 387     }
 388 }
 389
 390 static const MemoryRegionOps pci_config_ops = {
 391     .read = apb_pci_config_read,
 392     .write = apb_pci_config_write,
 393     .endianness = DEVICE_NATIVE_ENDIAN,
 394 };
 395
 396 static int pci_pbm_init_device(SysBusDevice *dev)
 397 {
 398     APBState *s;
 399     unsigned int i;
 400
 401     s = FROM_SYSBUS(APBState, dev);
 402     for (i = 0; i < 8; i++) {
 403         s->pci_irq_map[i] = (0x1f << 6) | (i << 2);
 404     }
 405     for (i = 0; i < 32; i++) {
 406         sysbus_init_irq(dev, &s->pci_irqs[i]);
 407     }
 408
 409     /* apb_config */
 410     memory_region_init_io(&s->apb_config, &apb_config_ops, s, "apb-config",
 411                           0x10000);
 412     /* at region 0 */
 413     sysbus_init_mmio(dev, &s->apb_config);
 414
 415     memory_region_init_io(&s->pci_config, &pci_config_ops, s, "apb-pci-config",
 416                           0x1000000);
 417     /* at region 1 */
 418     sysbus_init_mmio(dev, &s->pci_config);
 419
 420     /* pci_ioport */
 421     memory_region_init_io(&s->pci_ioport, &pci_ioport_ops, s,
 422                           "apb-pci-ioport", 0x10000);
 423     /* at region 2 */
 424     sysbus_init_mmio(dev, &s->pci_ioport);
 425
 426     return 0;
 427 }
 428
 429 static int pbm_pci_host_init(PCIDevice *d)
 430 {
 431     pci_set_word(d->config + PCI_COMMAND,
 432                  PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 433     pci_set_word(d->config + PCI_STATUS,
 434                  PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ |
 435                  PCI_STATUS_DEVSEL_MEDIUM);
 436     return 0;
 437 }
 438
 439 static void pbm_pci_host_class_init(ObjectClass *klass, void *data)
 440 {
 441     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 442
 443     k->init = pbm_pci_host_init;
 444     k->vendor_id = PCI_VENDOR_ID_SUN;
 445     k->device_id = PCI_DEVICE_ID_SUN_SABRE;
 446     k->class_id = PCI_CLASS_BRIDGE_HOST;
 447     k->is_bridge = 1;
 448 }
 449
 450 static DeviceInfo pbm_pci_host_info = {
 451     .name = "pbm-pci",
 452     .size = sizeof(PCIDevice),
 453     .class_init = pbm_pci_host_class_init,
 454 };
 455
 456 static void pbm_host_class_init(ObjectClass *klass, void *data)
 457 {
 458     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 459
 460     k->init = pci_pbm_init_device;
 461 }
 462
 463 static DeviceInfo pbm_host_info = {
 464     .name = "pbm",
 465     .size = sizeof(APBState),
 466     .reset = pci_pbm_reset,
 467     .class_init = pbm_host_class_init,
 468 };
 469
 470 static void pbm_pci_bridge_class_init(ObjectClass *klass, void *data)
 471 {
 472     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 473
 474     k->init = apb_pci_bridge_initfn;
 475     k->exit = pci_bridge_exitfn;
 476     k->vendor_id = PCI_VENDOR_ID_SUN;
 477     k->device_id = PCI_DEVICE_ID_SUN_SIMBA;
 478     k->revision = 0x11;
 479     k->config_write = pci_bridge_write_config;
 480     k->is_bridge = 1;
 481 }
 482
 483 static DeviceInfo pbm_pci_bridge_info = {
 484     .name = "pbm-bridge",
 485     .size = sizeof(PCIBridge),
 486     .vmsd = &vmstate_pci_device,
 487     .reset = pci_bridge_reset,
 488     .class_init = pbm_pci_bridge_class_init,
 489 };
 490
 491 static void pbm_register_devices(void)
 492 {
 493     sysbus_register_withprop(&pbm_host_info);
 494     pci_qdev_register(&pbm_pci_host_info);
 495     pci_qdev_register(&pbm_pci_bridge_info);
 496 }
 497
 498 device_init(pbm_register_devices)