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