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 "rwhandler.h"
  35 #include "apb_pci.h"
  36 #include "sysemu.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     ReadWriteHandler pci_config_handler;
  73     uint32_t iommu[4];
  74     uint32_t pci_control[16];
  75     uint32_t pci_irq_map[8];
  76     uint32_t obio_irq_map[32];
  77     qemu_irq pci_irqs[32];
  78     uint32_t reset_control;
  79     unsigned int nr_resets;
  80 } APBState;
  81
  82 static void apb_config_writel (void *opaque, target_phys_addr_t addr,
  83                                uint32_t val)
  84 {
  85     APBState *s = opaque;
  86
  87     APB_DPRINTF("%s: addr " TARGET_FMT_lx " val %x\n", __func__, addr, val);
  88
  89     switch (addr & 0xffff) {
  90     case 0x30 ... 0x4f: /* DMA error registers */
  91         /* XXX: not implemented yet */
  92         break;
  93     case 0x200 ... 0x20b: /* IOMMU */
  94         s->iommu[(addr & 0xf) >> 2] = val;
  95         break;
  96     case 0x20c ... 0x3ff: /* IOMMU flush */
  97         break;
  98     case 0xc00 ... 0xc3f: /* PCI interrupt control */
  99         if (addr & 4) {
 100             s->pci_irq_map[(addr & 0x3f) >> 3] &= PBM_PCI_IMR_MASK;
 101             s->pci_irq_map[(addr & 0x3f) >> 3] |= val & ~PBM_PCI_IMR_MASK;
 102         }
 103         break;
 104     case 0x2000 ... 0x202f: /* PCI control */
 105         s->pci_control[(addr & 0x3f) >> 2] = val;
 106         break;
 107     case 0xf020 ... 0xf027: /* Reset control */
 108         if (addr & 4) {
 109             val &= RESET_MASK;
 110             s->reset_control &= ~(val & RESET_WCMASK);
 111             s->reset_control |= val & RESET_WMASK;
 112             if (val & SOFT_POR) {
 113                 s->nr_resets = 0;
 114                 qemu_system_reset_request();
 115             } else if (val & SOFT_XIR) {
 116                 qemu_system_reset_request();
 117             }
 118         }
 119         break;
 120     case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */
 121     case 0xa400 ... 0xa67f: /* IOMMU diagnostics */
 122     case 0xa800 ... 0xa80f: /* Interrupt diagnostics */
 123     case 0xf000 ... 0xf01f: /* FFB config, memory control */
 124         /* we don't care */
 125     default:
 126         break;
 127     }
 128 }
 129
 130 static uint32_t apb_config_readl (void *opaque,
 131                                   target_phys_addr_t addr)
 132 {
 133     APBState *s = opaque;
 134     uint32_t val;
 135
 136     switch (addr & 0xffff) {
 137     case 0x30 ... 0x4f: /* DMA error registers */
 138         val = 0;
 139         /* XXX: not implemented yet */
 140         break;
 141     case 0x200 ... 0x20b: /* IOMMU */
 142         val = s->iommu[(addr & 0xf) >> 2];
 143         break;
 144     case 0x20c ... 0x3ff: /* IOMMU flush */
 145         val = 0;
 146         break;
 147     case 0xc00 ... 0xc3f: /* PCI interrupt control */
 148         if (addr & 4) {
 149             val = s->pci_irq_map[(addr & 0x3f) >> 3];
 150         } else {
 151             val = 0;
 152         }
 153         break;
 154     case 0x2000 ... 0x202f: /* PCI control */
 155         val = s->pci_control[(addr & 0x3f) >> 2];
 156         break;
 157     case 0xf020 ... 0xf027: /* Reset control */
 158         if (addr & 4) {
 159             val = s->reset_control;
 160         } else {
 161             val = 0;
 162         }
 163         break;
 164     case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */
 165     case 0xa400 ... 0xa67f: /* IOMMU diagnostics */
 166     case 0xa800 ... 0xa80f: /* Interrupt diagnostics */
 167     case 0xf000 ... 0xf01f: /* FFB config, memory control */
 168         /* we don't care */
 169     default:
 170         val = 0;
 171         break;
 172     }
 173     APB_DPRINTF("%s: addr " TARGET_FMT_lx " -> %x\n", __func__, addr, val);
 174
 175     return val;
 176 }
 177
 178 static CPUWriteMemoryFunc * const apb_config_write[] = {
 179     &apb_config_writel,
 180     &apb_config_writel,
 181     &apb_config_writel,
 182 };
 183
 184 static CPUReadMemoryFunc * const apb_config_read[] = {
 185     &apb_config_readl,
 186     &apb_config_readl,
 187     &apb_config_readl,
 188 };
 189
 190 static void apb_pci_config_write(ReadWriteHandler *h, pcibus_t addr,
 191                                  uint32_t val, int size)
 192 {
 193     APBState *s = container_of(h, APBState, pci_config_handler);
 194
 195     val = qemu_bswap_len(val, size);
 196     APB_DPRINTF("%s: addr " TARGET_FMT_lx " val %x\n", __func__, addr, val);
 197     pci_data_write(s->bus, addr, val, size);
 198 }
 199
 200 static uint32_t apb_pci_config_read(ReadWriteHandler *h, pcibus_t addr,
 201                                     int size)
 202 {
 203     uint32_t ret;
 204     APBState *s = container_of(h, APBState, pci_config_handler);
 205
 206     ret = pci_data_read(s->bus, addr, size);
 207     ret = qemu_bswap_len(ret, size);
 208     APB_DPRINTF("%s: addr " TARGET_FMT_lx " -> %x\n", __func__, addr, ret);
 209     return ret;
 210 }
 211
 212 static void pci_apb_iowriteb (void *opaque, target_phys_addr_t addr,
 213                                   uint32_t val)
 214 {
 215     cpu_outb(addr & IOPORTS_MASK, val);
 216 }
 217
 218 static void pci_apb_iowritew (void *opaque, target_phys_addr_t addr,
 219                                   uint32_t val)
 220 {
 221     cpu_outw(addr & IOPORTS_MASK, bswap16(val));
 222 }
 223
 224 static void pci_apb_iowritel (void *opaque, target_phys_addr_t addr,
 225                                 uint32_t val)
 226 {
 227     cpu_outl(addr & IOPORTS_MASK, bswap32(val));
 228 }
 229
 230 static uint32_t pci_apb_ioreadb (void *opaque, target_phys_addr_t addr)
 231 {
 232     uint32_t val;
 233
 234     val = cpu_inb(addr & IOPORTS_MASK);
 235     return val;
 236 }
 237
 238 static uint32_t pci_apb_ioreadw (void *opaque, target_phys_addr_t addr)
 239 {
 240     uint32_t val;
 241
 242     val = bswap16(cpu_inw(addr & IOPORTS_MASK));
 243     return val;
 244 }
 245
 246 static uint32_t pci_apb_ioreadl (void *opaque, target_phys_addr_t addr)
 247 {
 248     uint32_t val;
 249
 250     val = bswap32(cpu_inl(addr & IOPORTS_MASK));
 251     return val;
 252 }
 253
 254 static CPUWriteMemoryFunc * const pci_apb_iowrite[] = {
 255     &pci_apb_iowriteb,
 256     &pci_apb_iowritew,
 257     &pci_apb_iowritel,
 258 };
 259
 260 static CPUReadMemoryFunc * const pci_apb_ioread[] = {
 261     &pci_apb_ioreadb,
 262     &pci_apb_ioreadw,
 263     &pci_apb_ioreadl,
 264 };
 265
 266 /* The APB host has an IRQ line for each IRQ line of each slot.  */
 267 static int pci_apb_map_irq(PCIDevice *pci_dev, int irq_num)
 268 {
 269     return ((pci_dev->devfn & 0x18) >> 1) + irq_num;
 270 }
 271
 272 static int pci_pbm_map_irq(PCIDevice *pci_dev, int irq_num)
 273 {
 274     int bus_offset;
 275     if (pci_dev->devfn & 1)
 276         bus_offset = 16;
 277     else
 278         bus_offset = 0;
 279     return bus_offset + irq_num;
 280 }
 281
 282 static void pci_apb_set_irq(void *opaque, int irq_num, int level)
 283 {
 284     APBState *s = opaque;
 285
 286     /* PCI IRQ map onto the first 32 INO.  */
 287     if (irq_num < 32) {
 288         if (s->pci_irq_map[irq_num >> 2] & PBM_PCI_IMR_ENABLED) {
 289             APB_DPRINTF("%s: set irq %d level %d\n", __func__, irq_num, level);
 290             qemu_set_irq(s->pci_irqs[irq_num], level);
 291         } else {
 292             APB_DPRINTF("%s: not enabled: lower irq %d\n", __func__, irq_num);
 293             qemu_irq_lower(s->pci_irqs[irq_num]);
 294         }
 295     }
 296 }
 297
 298 static int apb_pci_bridge_initfn(PCIDevice *dev)
 299 {
 300     int rc;
 301
 302     rc = pci_bridge_initfn(dev);
 303     if (rc < 0) {
 304         return rc;
 305     }
 306
 307     /*
 308      * command register:
 309      * According to PCI bridge spec, after reset
 310      *   bus master bit is off
 311      *   memory space enable bit is off
 312      * According to manual (805-1251.pdf).
 313      *   the reset value should be zero unless the boot pin is tied high
 314      *   (which is true) and thus it should be PCI_COMMAND_MEMORY.
 315      */
 316     pci_set_word(dev->config + PCI_COMMAND,
 317                  PCI_COMMAND_MEMORY);
 318     pci_set_word(dev->config + PCI_STATUS,
 319                  PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ |
 320                  PCI_STATUS_DEVSEL_MEDIUM);
 321     return 0;
 322 }
 323
 324 PCIBus *pci_apb_init(target_phys_addr_t special_base,
 325                      target_phys_addr_t mem_base,
 326                      qemu_irq *pic, PCIBus **bus2, PCIBus **bus3)
 327 {
 328     DeviceState *dev;
 329     SysBusDevice *s;
 330     APBState *d;
 331     unsigned int i;
 332     PCIDevice *pci_dev;
 333     PCIBridge *br;
 334
 335     /* Ultrasparc PBM main bus */
 336     dev = qdev_create(NULL, "pbm");
 337     qdev_init_nofail(dev);
 338     s = sysbus_from_qdev(dev);
 339     /* apb_config */
 340     sysbus_mmio_map(s, 0, special_base);
 341     /* PCI configuration space */
 342     sysbus_mmio_map(s, 1, special_base + 0x1000000ULL);
 343     /* pci_ioport */
 344     sysbus_mmio_map(s, 2, special_base + 0x2000000ULL);
 345     d = FROM_SYSBUS(APBState, s);
 346
 347     d->bus = pci_register_bus(&d->busdev.qdev, "pci",
 348                                          pci_apb_set_irq, pci_pbm_map_irq, d,
 349                                          0, 32);
 350     pci_bus_set_mem_base(d->bus, mem_base);
 351
 352     for (i = 0; i < 32; i++) {
 353         sysbus_connect_irq(s, i, pic[i]);
 354     }
 355
 356     pci_create_simple(d->bus, 0, "pbm");
 357
 358     /* APB secondary busses */
 359     pci_dev = pci_create_multifunction(d->bus, PCI_DEVFN(1, 0), true,
 360                                    "pbm-bridge");
 361     br = DO_UPCAST(PCIBridge, dev, pci_dev);
 362     pci_bridge_map_irq(br, "Advanced PCI Bus secondary bridge 1",
 363                        pci_apb_map_irq);
 364     qdev_init_nofail(&pci_dev->qdev);
 365     *bus2 = pci_bridge_get_sec_bus(br);
 366
 367     pci_dev = pci_create_multifunction(d->bus, PCI_DEVFN(1, 1), true,
 368                                    "pbm-bridge");
 369     br = DO_UPCAST(PCIBridge, dev, pci_dev);
 370     pci_bridge_map_irq(br, "Advanced PCI Bus secondary bridge 2",
 371                        pci_apb_map_irq);
 372     qdev_init_nofail(&pci_dev->qdev);
 373     *bus3 = pci_bridge_get_sec_bus(br);
 374
 375     return d->bus;
 376 }
 377
 378 static void pci_pbm_reset(DeviceState *d)
 379 {
 380     unsigned int i;
 381     APBState *s = container_of(d, APBState, busdev.qdev);
 382
 383     for (i = 0; i < 8; i++) {
 384         s->pci_irq_map[i] &= PBM_PCI_IMR_MASK;
 385     }
 386
 387     if (s->nr_resets++ == 0) {
 388         /* Power on reset */
 389         s->reset_control = POR;
 390     }
 391 }
 392
 393 static int pci_pbm_init_device(SysBusDevice *dev)
 394 {
 395     APBState *s;
 396     int pci_config, apb_config, pci_ioport;
 397     unsigned int i;
 398
 399     s = FROM_SYSBUS(APBState, dev);
 400     for (i = 0; i < 8; i++) {
 401         s->pci_irq_map[i] = (0x1f << 6) | (i << 2);
 402     }
 403     for (i = 0; i < 32; i++) {
 404         sysbus_init_irq(dev, &s->pci_irqs[i]);
 405     }
 406
 407     /* apb_config */
 408     apb_config = cpu_register_io_memory(apb_config_read,
 409                                         apb_config_write, s,
 410                                         DEVICE_NATIVE_ENDIAN);
 411     /* at region 0 */
 412     sysbus_init_mmio(dev, 0x10000ULL, apb_config);
 413
 414     /* PCI configuration space */
 415     s->pci_config_handler.read = apb_pci_config_read;
 416     s->pci_config_handler.write = apb_pci_config_write;
 417     pci_config = cpu_register_io_memory_simple(&s->pci_config_handler,
 418                                                DEVICE_NATIVE_ENDIAN);
 419     assert(pci_config >= 0);
 420     /* at region 1 */
 421     sysbus_init_mmio(dev, 0x1000000ULL, pci_config);
 422
 423     /* pci_ioport */
 424     pci_ioport = cpu_register_io_memory(pci_apb_ioread,
 425                                         pci_apb_iowrite, s,
 426                                         DEVICE_NATIVE_ENDIAN);
 427     /* at region 2 */
 428     sysbus_init_mmio(dev, 0x10000ULL, pci_ioport);
 429
 430     return 0;
 431 }
 432
 433 static int pbm_pci_host_init(PCIDevice *d)
 434 {
 435     pci_set_word(d->config + PCI_COMMAND,
 436                  PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 437     pci_set_word(d->config + PCI_STATUS,
 438                  PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ |
 439                  PCI_STATUS_DEVSEL_MEDIUM);
 440     return 0;
 441 }
 442
 443 static PCIDeviceInfo pbm_pci_host_info = {
 444     .qdev.name = "pbm",
 445     .qdev.size = sizeof(PCIDevice),
 446     .init      = pbm_pci_host_init,
 447     .vendor_id = PCI_VENDOR_ID_SUN,
 448     .device_id = PCI_DEVICE_ID_SUN_SABRE,
 449     .class_id  = PCI_CLASS_BRIDGE_HOST,
 450     .is_bridge = 1,
 451 };
 452
 453 static SysBusDeviceInfo pbm_host_info = {
 454     .qdev.name = "pbm",
 455     .qdev.size = sizeof(APBState),
 456     .qdev.reset = pci_pbm_reset,
 457     .init = pci_pbm_init_device,
 458 };
 459
 460 static PCIDeviceInfo pbm_pci_bridge_info = {
 461     .qdev.name = "pbm-bridge",
 462     .qdev.size = sizeof(PCIBridge),
 463     .qdev.vmsd = &vmstate_pci_device,
 464     .qdev.reset = pci_bridge_reset,
 465     .init = apb_pci_bridge_initfn,
 466     .exit = pci_bridge_exitfn,
 467     .vendor_id = PCI_VENDOR_ID_SUN,
 468     .device_id = PCI_DEVICE_ID_SUN_SIMBA,
 469     .revision = 0x11,
 470     .config_write = pci_bridge_write_config,
 471     .is_bridge = 1,
 472 };
 473
 474 static void pbm_register_devices(void)
 475 {
 476     sysbus_register_withprop(&pbm_host_info);
 477     pci_qdev_register(&pbm_pci_host_info);
 478     pci_qdev_register(&pbm_pci_bridge_info);
 479 }
 480
 481 device_init(pbm_register_devices)