hw/integratorcp.c

   1 /*
   2  * ARM Integrator CP System emulation.
   3  *
   4  * Copyright (c) 2005-2007 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licensed under the GPL
   8  */
   9
  10 #include "sysbus.h"
  11 #include "devices.h"
  12 #include "boards.h"
  13 #include "arm-misc.h"
  14 #include "net/net.h"
  15 #include "exec/address-spaces.h"
  16 #include "sysemu.h"
  17
  18 typedef struct {
  19     SysBusDevice busdev;
  20     MemoryRegion iomem;
  21     uint32_t memsz;
  22     MemoryRegion flash;
  23     uint32_t cm_osc;
  24     uint32_t cm_ctrl;
  25     uint32_t cm_lock;
  26     uint32_t cm_auxosc;
  27     uint32_t cm_sdram;
  28     uint32_t cm_init;
  29     uint32_t cm_flags;
  30     uint32_t cm_nvflags;
  31     uint32_t int_level;
  32     uint32_t irq_enabled;
  33     uint32_t fiq_enabled;
  34 } integratorcm_state;
  35
  36 static uint8_t integrator_spd[128] = {
  37    128, 8, 4, 11, 9, 1, 64, 0,  2, 0xa0, 0xa0, 0, 0, 8, 0, 1,
  38    0xe, 4, 0x1c, 1, 2, 0x20, 0xc0, 0, 0, 0, 0, 0x30, 0x28, 0x30, 0x28, 0x40
  39 };
  40
  41 static uint64_t integratorcm_read(void *opaque, hwaddr offset,
  42                                   unsigned size)
  43 {
  44     integratorcm_state *s = (integratorcm_state *)opaque;
  45     if (offset >= 0x100 && offset < 0x200) {
  46         /* CM_SPD */
  47         if (offset >= 0x180)
  48             return 0;
  49         return integrator_spd[offset >> 2];
  50     }
  51     switch (offset >> 2) {
  52     case 0: /* CM_ID */
  53         return 0x411a3001;
  54     case 1: /* CM_PROC */
  55         return 0;
  56     case 2: /* CM_OSC */
  57         return s->cm_osc;
  58     case 3: /* CM_CTRL */
  59         return s->cm_ctrl;
  60     case 4: /* CM_STAT */
  61         return 0x00100000;
  62     case 5: /* CM_LOCK */
  63         if (s->cm_lock == 0xa05f) {
  64             return 0x1a05f;
  65         } else {
  66             return s->cm_lock;
  67         }
  68     case 6: /* CM_LMBUSCNT */
  69         /* ??? High frequency timer.  */
  70         hw_error("integratorcm_read: CM_LMBUSCNT");
  71     case 7: /* CM_AUXOSC */
  72         return s->cm_auxosc;
  73     case 8: /* CM_SDRAM */
  74         return s->cm_sdram;
  75     case 9: /* CM_INIT */
  76         return s->cm_init;
  77     case 10: /* CM_REFCT */
  78         /* ??? High frequency timer.  */
  79         hw_error("integratorcm_read: CM_REFCT");
  80     case 12: /* CM_FLAGS */
  81         return s->cm_flags;
  82     case 14: /* CM_NVFLAGS */
  83         return s->cm_nvflags;
  84     case 16: /* CM_IRQ_STAT */
  85         return s->int_level & s->irq_enabled;
  86     case 17: /* CM_IRQ_RSTAT */
  87         return s->int_level;
  88     case 18: /* CM_IRQ_ENSET */
  89         return s->irq_enabled;
  90     case 20: /* CM_SOFT_INTSET */
  91         return s->int_level & 1;
  92     case 24: /* CM_FIQ_STAT */
  93         return s->int_level & s->fiq_enabled;
  94     case 25: /* CM_FIQ_RSTAT */
  95         return s->int_level;
  96     case 26: /* CM_FIQ_ENSET */
  97         return s->fiq_enabled;
  98     case 32: /* CM_VOLTAGE_CTL0 */
  99     case 33: /* CM_VOLTAGE_CTL1 */
 100     case 34: /* CM_VOLTAGE_CTL2 */
 101     case 35: /* CM_VOLTAGE_CTL3 */
 102         /* ??? Voltage control unimplemented.  */
 103         return 0;
 104     default:
 105         hw_error("integratorcm_read: Unimplemented offset 0x%x\n",
 106                  (int)offset);
 107         return 0;
 108     }
 109 }
 110
 111 static void integratorcm_do_remap(integratorcm_state *s)
 112 {
 113     /* Sync memory region state with CM_CTRL REMAP bit:
 114      * bit 0 => flash at address 0; bit 1 => RAM
 115      */
 116     memory_region_set_enabled(&s->flash, !(s->cm_ctrl & 4));
 117 }
 118
 119 static void integratorcm_set_ctrl(integratorcm_state *s, uint32_t value)
 120 {
 121     if (value & 8) {
 122         qemu_system_reset_request();
 123     }
 124     if ((s->cm_ctrl ^ value) & 1) {
 125         /* (value & 1) != 0 means the green "MISC LED" is lit.
 126          * We don't have any nice place to display LEDs. printf is a bad
 127          * idea because Linux uses the LED as a heartbeat and the output
 128          * will swamp anything else on the terminal.
 129          */
 130     }
 131     /* Note that the RESET bit [3] always reads as zero */
 132     s->cm_ctrl = (s->cm_ctrl & ~5) | (value & 5);
 133     integratorcm_do_remap(s);
 134 }
 135
 136 static void integratorcm_update(integratorcm_state *s)
 137 {
 138     /* ??? The CPU irq/fiq is raised when either the core module or base PIC
 139        are active.  */
 140     if (s->int_level & (s->irq_enabled | s->fiq_enabled))
 141         hw_error("Core module interrupt\n");
 142 }
 143
 144 static void integratorcm_write(void *opaque, hwaddr offset,
 145                                uint64_t value, unsigned size)
 146 {
 147     integratorcm_state *s = (integratorcm_state *)opaque;
 148     switch (offset >> 2) {
 149     case 2: /* CM_OSC */
 150         if (s->cm_lock == 0xa05f)
 151             s->cm_osc = value;
 152         break;
 153     case 3: /* CM_CTRL */
 154         integratorcm_set_ctrl(s, value);
 155         break;
 156     case 5: /* CM_LOCK */
 157         s->cm_lock = value & 0xffff;
 158         break;
 159     case 7: /* CM_AUXOSC */
 160         if (s->cm_lock == 0xa05f)
 161             s->cm_auxosc = value;
 162         break;
 163     case 8: /* CM_SDRAM */
 164         s->cm_sdram = value;
 165         break;
 166     case 9: /* CM_INIT */
 167         /* ??? This can change the memory bus frequency.  */
 168         s->cm_init = value;
 169         break;
 170     case 12: /* CM_FLAGSS */
 171         s->cm_flags |= value;
 172         break;
 173     case 13: /* CM_FLAGSC */
 174         s->cm_flags &= ~value;
 175         break;
 176     case 14: /* CM_NVFLAGSS */
 177         s->cm_nvflags |= value;
 178         break;
 179     case 15: /* CM_NVFLAGSS */
 180         s->cm_nvflags &= ~value;
 181         break;
 182     case 18: /* CM_IRQ_ENSET */
 183         s->irq_enabled |= value;
 184         integratorcm_update(s);
 185         break;
 186     case 19: /* CM_IRQ_ENCLR */
 187         s->irq_enabled &= ~value;
 188         integratorcm_update(s);
 189         break;
 190     case 20: /* CM_SOFT_INTSET */
 191         s->int_level |= (value & 1);
 192         integratorcm_update(s);
 193         break;
 194     case 21: /* CM_SOFT_INTCLR */
 195         s->int_level &= ~(value & 1);
 196         integratorcm_update(s);
 197         break;
 198     case 26: /* CM_FIQ_ENSET */
 199         s->fiq_enabled |= value;
 200         integratorcm_update(s);
 201         break;
 202     case 27: /* CM_FIQ_ENCLR */
 203         s->fiq_enabled &= ~value;
 204         integratorcm_update(s);
 205         break;
 206     case 32: /* CM_VOLTAGE_CTL0 */
 207     case 33: /* CM_VOLTAGE_CTL1 */
 208     case 34: /* CM_VOLTAGE_CTL2 */
 209     case 35: /* CM_VOLTAGE_CTL3 */
 210         /* ??? Voltage control unimplemented.  */
 211         break;
 212     default:
 213         hw_error("integratorcm_write: Unimplemented offset 0x%x\n",
 214                  (int)offset);
 215         break;
 216     }
 217 }
 218
 219 /* Integrator/CM control registers.  */
 220
 221 static const MemoryRegionOps integratorcm_ops = {
 222     .read = integratorcm_read,
 223     .write = integratorcm_write,
 224     .endianness = DEVICE_NATIVE_ENDIAN,
 225 };
 226
 227 static int integratorcm_init(SysBusDevice *dev)
 228 {
 229     integratorcm_state *s = FROM_SYSBUS(integratorcm_state, dev);
 230
 231     s->cm_osc = 0x01000048;
 232     /* ??? What should the high bits of this value be?  */
 233     s->cm_auxosc = 0x0007feff;
 234     s->cm_sdram = 0x00011122;
 235     if (s->memsz >= 256) {
 236         integrator_spd[31] = 64;
 237         s->cm_sdram |= 0x10;
 238     } else if (s->memsz >= 128) {
 239         integrator_spd[31] = 32;
 240         s->cm_sdram |= 0x0c;
 241     } else if (s->memsz >= 64) {
 242         integrator_spd[31] = 16;
 243         s->cm_sdram |= 0x08;
 244     } else if (s->memsz >= 32) {
 245         integrator_spd[31] = 4;
 246         s->cm_sdram |= 0x04;
 247     } else {
 248         integrator_spd[31] = 2;
 249     }
 250     memcpy(integrator_spd + 73, "QEMU-MEMORY", 11);
 251     s->cm_init = 0x00000112;
 252     memory_region_init_ram(&s->flash, "integrator.flash", 0x100000);
 253     vmstate_register_ram_global(&s->flash);
 254
 255     memory_region_init_io(&s->iomem, &integratorcm_ops, s,
 256                           "integratorcm", 0x00800000);
 257     sysbus_init_mmio(dev, &s->iomem);
 258
 259     integratorcm_do_remap(s);
 260     /* ??? Save/restore.  */
 261     return 0;
 262 }
 263
 264 /* Integrator/CP hardware emulation.  */
 265 /* Primary interrupt controller.  */
 266
 267 typedef struct icp_pic_state
 268 {
 269   SysBusDevice busdev;
 270   MemoryRegion iomem;
 271   uint32_t level;
 272   uint32_t irq_enabled;
 273   uint32_t fiq_enabled;
 274   qemu_irq parent_irq;
 275   qemu_irq parent_fiq;
 276 } icp_pic_state;
 277
 278 static void icp_pic_update(icp_pic_state *s)
 279 {
 280     uint32_t flags;
 281
 282     flags = (s->level & s->irq_enabled);
 283     qemu_set_irq(s->parent_irq, flags != 0);
 284     flags = (s->level & s->fiq_enabled);
 285     qemu_set_irq(s->parent_fiq, flags != 0);
 286 }
 287
 288 static void icp_pic_set_irq(void *opaque, int irq, int level)
 289 {
 290     icp_pic_state *s = (icp_pic_state *)opaque;
 291     if (level)
 292         s->level |= 1 << irq;
 293     else
 294         s->level &= ~(1 << irq);
 295     icp_pic_update(s);
 296 }
 297
 298 static uint64_t icp_pic_read(void *opaque, hwaddr offset,
 299                              unsigned size)
 300 {
 301     icp_pic_state *s = (icp_pic_state *)opaque;
 302
 303     switch (offset >> 2) {
 304     case 0: /* IRQ_STATUS */
 305         return s->level & s->irq_enabled;
 306     case 1: /* IRQ_RAWSTAT */
 307         return s->level;
 308     case 2: /* IRQ_ENABLESET */
 309         return s->irq_enabled;
 310     case 4: /* INT_SOFTSET */
 311         return s->level & 1;
 312     case 8: /* FRQ_STATUS */
 313         return s->level & s->fiq_enabled;
 314     case 9: /* FRQ_RAWSTAT */
 315         return s->level;
 316     case 10: /* FRQ_ENABLESET */
 317         return s->fiq_enabled;
 318     case 3: /* IRQ_ENABLECLR */
 319     case 5: /* INT_SOFTCLR */
 320     case 11: /* FRQ_ENABLECLR */
 321     default:
 322         printf ("icp_pic_read: Bad register offset 0x%x\n", (int)offset);
 323         return 0;
 324     }
 325 }
 326
 327 static void icp_pic_write(void *opaque, hwaddr offset,
 328                           uint64_t value, unsigned size)
 329 {
 330     icp_pic_state *s = (icp_pic_state *)opaque;
 331
 332     switch (offset >> 2) {
 333     case 2: /* IRQ_ENABLESET */
 334         s->irq_enabled |= value;
 335         break;
 336     case 3: /* IRQ_ENABLECLR */
 337         s->irq_enabled &= ~value;
 338         break;
 339     case 4: /* INT_SOFTSET */
 340         if (value & 1)
 341             icp_pic_set_irq(s, 0, 1);
 342         break;
 343     case 5: /* INT_SOFTCLR */
 344         if (value & 1)
 345             icp_pic_set_irq(s, 0, 0);
 346         break;
 347     case 10: /* FRQ_ENABLESET */
 348         s->fiq_enabled |= value;
 349         break;
 350     case 11: /* FRQ_ENABLECLR */
 351         s->fiq_enabled &= ~value;
 352         break;
 353     case 0: /* IRQ_STATUS */
 354     case 1: /* IRQ_RAWSTAT */
 355     case 8: /* FRQ_STATUS */
 356     case 9: /* FRQ_RAWSTAT */
 357     default:
 358         printf ("icp_pic_write: Bad register offset 0x%x\n", (int)offset);
 359         return;
 360     }
 361     icp_pic_update(s);
 362 }
 363
 364 static const MemoryRegionOps icp_pic_ops = {
 365     .read = icp_pic_read,
 366     .write = icp_pic_write,
 367     .endianness = DEVICE_NATIVE_ENDIAN,
 368 };
 369
 370 static int icp_pic_init(SysBusDevice *dev)
 371 {
 372     icp_pic_state *s = FROM_SYSBUS(icp_pic_state, dev);
 373
 374     qdev_init_gpio_in(&dev->qdev, icp_pic_set_irq, 32);
 375     sysbus_init_irq(dev, &s->parent_irq);
 376     sysbus_init_irq(dev, &s->parent_fiq);
 377     memory_region_init_io(&s->iomem, &icp_pic_ops, s, "icp-pic", 0x00800000);
 378     sysbus_init_mmio(dev, &s->iomem);
 379     return 0;
 380 }
 381
 382 /* CP control registers.  */
 383
 384 static uint64_t icp_control_read(void *opaque, hwaddr offset,
 385                                  unsigned size)
 386 {
 387     switch (offset >> 2) {
 388     case 0: /* CP_IDFIELD */
 389         return 0x41034003;
 390     case 1: /* CP_FLASHPROG */
 391         return 0;
 392     case 2: /* CP_INTREG */
 393         return 0;
 394     case 3: /* CP_DECODE */
 395         return 0x11;
 396     default:
 397         hw_error("icp_control_read: Bad offset %x\n", (int)offset);
 398         return 0;
 399     }
 400 }
 401
 402 static void icp_control_write(void *opaque, hwaddr offset,
 403                           uint64_t value, unsigned size)
 404 {
 405     switch (offset >> 2) {
 406     case 1: /* CP_FLASHPROG */
 407     case 2: /* CP_INTREG */
 408     case 3: /* CP_DECODE */
 409         /* Nothing interesting implemented yet.  */
 410         break;
 411     default:
 412         hw_error("icp_control_write: Bad offset %x\n", (int)offset);
 413     }
 414 }
 415
 416 static const MemoryRegionOps icp_control_ops = {
 417     .read = icp_control_read,
 418     .write = icp_control_write,
 419     .endianness = DEVICE_NATIVE_ENDIAN,
 420 };
 421
 422 static void icp_control_init(hwaddr base)
 423 {
 424     MemoryRegion *io;
 425
 426     io = (MemoryRegion *)g_malloc0(sizeof(MemoryRegion));
 427     memory_region_init_io(io, &icp_control_ops, NULL,
 428                           "control", 0x00800000);
 429     memory_region_add_subregion(get_system_memory(), base, io);
 430     /* ??? Save/restore.  */
 431 }
 432
 433
 434 /* Board init.  */
 435
 436 static struct arm_boot_info integrator_binfo = {
 437     .loader_start = 0x0,
 438     .board_id = 0x113,
 439 };
 440
 441 static void integratorcp_init(QEMUMachineInitArgs *args)
 442 {
 443     ram_addr_t ram_size = args->ram_size;
 444     const char *cpu_model = args->cpu_model;
 445     const char *kernel_filename = args->kernel_filename;
 446     const char *kernel_cmdline = args->kernel_cmdline;
 447     const char *initrd_filename = args->initrd_filename;
 448     ARMCPU *cpu;
 449     MemoryRegion *address_space_mem = get_system_memory();
 450     MemoryRegion *ram = g_new(MemoryRegion, 1);
 451     MemoryRegion *ram_alias = g_new(MemoryRegion, 1);
 452     qemu_irq pic[32];
 453     qemu_irq *cpu_pic;
 454     DeviceState *dev;
 455     int i;
 456
 457     if (!cpu_model) {
 458         cpu_model = "arm926";
 459     }
 460     cpu = cpu_arm_init(cpu_model);
 461     if (!cpu) {
 462         fprintf(stderr, "Unable to find CPU definition\n");
 463         exit(1);
 464     }
 465
 466     memory_region_init_ram(ram, "integrator.ram", ram_size);
 467     vmstate_register_ram_global(ram);
 468     /* ??? On a real system the first 1Mb is mapped as SSRAM or boot flash.  */
 469     /* ??? RAM should repeat to fill physical memory space.  */
 470     /* SDRAM at address zero*/
 471     memory_region_add_subregion(address_space_mem, 0, ram);
 472     /* And again at address 0x80000000 */
 473     memory_region_init_alias(ram_alias, "ram.alias", ram, 0, ram_size);
 474     memory_region_add_subregion(address_space_mem, 0x80000000, ram_alias);
 475
 476     dev = qdev_create(NULL, "integrator_core");
 477     qdev_prop_set_uint32(dev, "memsz", ram_size >> 20);
 478     qdev_init_nofail(dev);
 479     sysbus_mmio_map((SysBusDevice *)dev, 0, 0x10000000);
 480
 481     cpu_pic = arm_pic_init_cpu(cpu);
 482     dev = sysbus_create_varargs("integrator_pic", 0x14000000,
 483                                 cpu_pic[ARM_PIC_CPU_IRQ],
 484                                 cpu_pic[ARM_PIC_CPU_FIQ], NULL);
 485     for (i = 0; i < 32; i++) {
 486         pic[i] = qdev_get_gpio_in(dev, i);
 487     }
 488     sysbus_create_simple("integrator_pic", 0xca000000, pic[26]);
 489     sysbus_create_varargs("integrator_pit", 0x13000000,
 490                           pic[5], pic[6], pic[7], NULL);
 491     sysbus_create_simple("pl031", 0x15000000, pic[8]);
 492     sysbus_create_simple("pl011", 0x16000000, pic[1]);
 493     sysbus_create_simple("pl011", 0x17000000, pic[2]);
 494     icp_control_init(0xcb000000);
 495     sysbus_create_simple("pl050_keyboard", 0x18000000, pic[3]);
 496     sysbus_create_simple("pl050_mouse", 0x19000000, pic[4]);
 497     sysbus_create_varargs("pl181", 0x1c000000, pic[23], pic[24], NULL);
 498     if (nd_table[0].used)
 499         smc91c111_init(&nd_table[0], 0xc8000000, pic[27]);
 500
 501     sysbus_create_simple("pl110", 0xc0000000, pic[22]);
 502
 503     integrator_binfo.ram_size = ram_size;
 504     integrator_binfo.kernel_filename = kernel_filename;
 505     integrator_binfo.kernel_cmdline = kernel_cmdline;
 506     integrator_binfo.initrd_filename = initrd_filename;
 507     arm_load_kernel(cpu, &integrator_binfo);
 508 }
 509
 510 static QEMUMachine integratorcp_machine = {
 511     .name = "integratorcp",
 512     .desc = "ARM Integrator/CP (ARM926EJ-S)",
 513     .init = integratorcp_init,
 514     .is_default = 1,
 515 };
 516
 517 static void integratorcp_machine_init(void)
 518 {
 519     qemu_register_machine(&integratorcp_machine);
 520 }
 521
 522 machine_init(integratorcp_machine_init);
 523
 524 static Property core_properties[] = {
 525     DEFINE_PROP_UINT32("memsz", integratorcm_state, memsz, 0),
 526     DEFINE_PROP_END_OF_LIST(),
 527 };
 528
 529 static void core_class_init(ObjectClass *klass, void *data)
 530 {
 531     DeviceClass *dc = DEVICE_CLASS(klass);
 532     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 533
 534     k->init = integratorcm_init;
 535     dc->props = core_properties;
 536 }
 537
 538 static TypeInfo core_info = {
 539     .name          = "integrator_core",
 540     .parent        = TYPE_SYS_BUS_DEVICE,
 541     .instance_size = sizeof(integratorcm_state),
 542     .class_init    = core_class_init,
 543 };
 544
 545 static void icp_pic_class_init(ObjectClass *klass, void *data)
 546 {
 547     SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
 548
 549     sdc->init = icp_pic_init;
 550 }
 551
 552 static TypeInfo icp_pic_info = {
 553     .name          = "integrator_pic",
 554     .parent        = TYPE_SYS_BUS_DEVICE,
 555     .instance_size = sizeof(icp_pic_state),
 556     .class_init    = icp_pic_class_init,
 557 };
 558
 559 static void integratorcp_register_types(void)
 560 {
 561     type_register_static(&icp_pic_info);
 562     type_register_static(&core_info);
 563 }
 564
 565 type_init(integratorcp_register_types)