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 licenced under the GPL
   8  */
   9
  10 #include "hw.h"
  11 #include "primecell.h"
  12 #include "devices.h"
  13 #include "sysemu.h"
  14 #include "boards.h"
  15 #include "arm-misc.h"
  16 #include "net.h"
  17
  18 typedef struct {
  19     uint32_t flash_offset;
  20     uint32_t cm_osc;
  21     uint32_t cm_ctrl;
  22     uint32_t cm_lock;
  23     uint32_t cm_auxosc;
  24     uint32_t cm_sdram;
  25     uint32_t cm_init;
  26     uint32_t cm_flags;
  27     uint32_t cm_nvflags;
  28     uint32_t int_level;
  29     uint32_t irq_enabled;
  30     uint32_t fiq_enabled;
  31 } integratorcm_state;
  32
  33 static uint8_t integrator_spd[128] = {
  34    128, 8, 4, 11, 9, 1, 64, 0,  2, 0xa0, 0xa0, 0, 0, 8, 0, 1,
  35    0xe, 4, 0x1c, 1, 2, 0x20, 0xc0, 0, 0, 0, 0, 0x30, 0x28, 0x30, 0x28, 0x40
  36 };
  37
  38 static uint32_t integratorcm_read(void *opaque, target_phys_addr_t offset)
  39 {
  40     integratorcm_state *s = (integratorcm_state *)opaque;
  41     if (offset >= 0x100 && offset < 0x200) {
  42         /* CM_SPD */
  43         if (offset >= 0x180)
  44             return 0;
  45         return integrator_spd[offset >> 2];
  46     }
  47     switch (offset >> 2) {
  48     case 0: /* CM_ID */
  49         return 0x411a3001;
  50     case 1: /* CM_PROC */
  51         return 0;
  52     case 2: /* CM_OSC */
  53         return s->cm_osc;
  54     case 3: /* CM_CTRL */
  55         return s->cm_ctrl;
  56     case 4: /* CM_STAT */
  57         return 0x00100000;
  58     case 5: /* CM_LOCK */
  59         if (s->cm_lock == 0xa05f) {
  60             return 0x1a05f;
  61         } else {
  62             return s->cm_lock;
  63         }
  64     case 6: /* CM_LMBUSCNT */
  65         /* ??? High frequency timer.  */
  66         cpu_abort(cpu_single_env, "integratorcm_read: CM_LMBUSCNT");
  67     case 7: /* CM_AUXOSC */
  68         return s->cm_auxosc;
  69     case 8: /* CM_SDRAM */
  70         return s->cm_sdram;
  71     case 9: /* CM_INIT */
  72         return s->cm_init;
  73     case 10: /* CM_REFCT */
  74         /* ??? High frequency timer.  */
  75         cpu_abort(cpu_single_env, "integratorcm_read: CM_REFCT");
  76     case 12: /* CM_FLAGS */
  77         return s->cm_flags;
  78     case 14: /* CM_NVFLAGS */
  79         return s->cm_nvflags;
  80     case 16: /* CM_IRQ_STAT */
  81         return s->int_level & s->irq_enabled;
  82     case 17: /* CM_IRQ_RSTAT */
  83         return s->int_level;
  84     case 18: /* CM_IRQ_ENSET */
  85         return s->irq_enabled;
  86     case 20: /* CM_SOFT_INTSET */
  87         return s->int_level & 1;
  88     case 24: /* CM_FIQ_STAT */
  89         return s->int_level & s->fiq_enabled;
  90     case 25: /* CM_FIQ_RSTAT */
  91         return s->int_level;
  92     case 26: /* CM_FIQ_ENSET */
  93         return s->fiq_enabled;
  94     case 32: /* CM_VOLTAGE_CTL0 */
  95     case 33: /* CM_VOLTAGE_CTL1 */
  96     case 34: /* CM_VOLTAGE_CTL2 */
  97     case 35: /* CM_VOLTAGE_CTL3 */
  98         /* ??? Voltage control unimplemented.  */
  99         return 0;
 100     default:
 101         cpu_abort (cpu_single_env,
 102             "integratorcm_read: Unimplemented offset 0x%x\n", (int)offset);
 103         return 0;
 104     }
 105 }
 106
 107 static void integratorcm_do_remap(integratorcm_state *s, int flash)
 108 {
 109     if (flash) {
 110         cpu_register_physical_memory(0, 0x100000, IO_MEM_RAM);
 111     } else {
 112         cpu_register_physical_memory(0, 0x100000, s->flash_offset | IO_MEM_RAM);
 113     }
 114     //??? tlb_flush (cpu_single_env, 1);
 115 }
 116
 117 static void integratorcm_set_ctrl(integratorcm_state *s, uint32_t value)
 118 {
 119     if (value & 8) {
 120         cpu_abort(cpu_single_env, "Board reset\n");
 121     }
 122     if ((s->cm_init ^ value) & 4) {
 123         integratorcm_do_remap(s, (value & 4) == 0);
 124     }
 125     if ((s->cm_init ^ value) & 1) {
 126         printf("Green LED %s\n", (value & 1) ? "on" : "off");
 127     }
 128     s->cm_init = (s->cm_init & ~ 5) | (value ^ 5);
 129 }
 130
 131 static void integratorcm_update(integratorcm_state *s)
 132 {
 133     /* ??? The CPU irq/fiq is raised when either the core module or base PIC
 134        are active.  */
 135     if (s->int_level & (s->irq_enabled | s->fiq_enabled))
 136         cpu_abort(cpu_single_env, "Core module interrupt\n");
 137 }
 138
 139 static void integratorcm_write(void *opaque, target_phys_addr_t offset,
 140                                uint32_t value)
 141 {
 142     integratorcm_state *s = (integratorcm_state *)opaque;
 143     switch (offset >> 2) {
 144     case 2: /* CM_OSC */
 145         if (s->cm_lock == 0xa05f)
 146             s->cm_osc = value;
 147         break;
 148     case 3: /* CM_CTRL */
 149         integratorcm_set_ctrl(s, value);
 150         break;
 151     case 5: /* CM_LOCK */
 152         s->cm_lock = value & 0xffff;
 153         break;
 154     case 7: /* CM_AUXOSC */
 155         if (s->cm_lock == 0xa05f)
 156             s->cm_auxosc = value;
 157         break;
 158     case 8: /* CM_SDRAM */
 159         s->cm_sdram = value;
 160         break;
 161     case 9: /* CM_INIT */
 162         /* ??? This can change the memory bus frequency.  */
 163         s->cm_init = value;
 164         break;
 165     case 12: /* CM_FLAGSS */
 166         s->cm_flags |= value;
 167         break;
 168     case 13: /* CM_FLAGSC */
 169         s->cm_flags &= ~value;
 170         break;
 171     case 14: /* CM_NVFLAGSS */
 172         s->cm_nvflags |= value;
 173         break;
 174     case 15: /* CM_NVFLAGSS */
 175         s->cm_nvflags &= ~value;
 176         break;
 177     case 18: /* CM_IRQ_ENSET */
 178         s->irq_enabled |= value;
 179         integratorcm_update(s);
 180         break;
 181     case 19: /* CM_IRQ_ENCLR */
 182         s->irq_enabled &= ~value;
 183         integratorcm_update(s);
 184         break;
 185     case 20: /* CM_SOFT_INTSET */
 186         s->int_level |= (value & 1);
 187         integratorcm_update(s);
 188         break;
 189     case 21: /* CM_SOFT_INTCLR */
 190         s->int_level &= ~(value & 1);
 191         integratorcm_update(s);
 192         break;
 193     case 26: /* CM_FIQ_ENSET */
 194         s->fiq_enabled |= value;
 195         integratorcm_update(s);
 196         break;
 197     case 27: /* CM_FIQ_ENCLR */
 198         s->fiq_enabled &= ~value;
 199         integratorcm_update(s);
 200         break;
 201     case 32: /* CM_VOLTAGE_CTL0 */
 202     case 33: /* CM_VOLTAGE_CTL1 */
 203     case 34: /* CM_VOLTAGE_CTL2 */
 204     case 35: /* CM_VOLTAGE_CTL3 */
 205         /* ??? Voltage control unimplemented.  */
 206         break;
 207     default:
 208         cpu_abort (cpu_single_env,
 209             "integratorcm_write: Unimplemented offset 0x%x\n", (int)offset);
 210         break;
 211     }
 212 }
 213
 214 /* Integrator/CM control registers.  */
 215
 216 static CPUReadMemoryFunc *integratorcm_readfn[] = {
 217    integratorcm_read,
 218    integratorcm_read,
 219    integratorcm_read
 220 };
 221
 222 static CPUWriteMemoryFunc *integratorcm_writefn[] = {
 223    integratorcm_write,
 224    integratorcm_write,
 225    integratorcm_write
 226 };
 227
 228 static void integratorcm_init(int memsz)
 229 {
 230     int iomemtype;
 231     integratorcm_state *s;
 232
 233     s = (integratorcm_state *)qemu_mallocz(sizeof(integratorcm_state));
 234     s->cm_osc = 0x01000048;
 235     /* ??? What should the high bits of this value be?  */
 236     s->cm_auxosc = 0x0007feff;
 237     s->cm_sdram = 0x00011122;
 238     if (memsz >= 256) {
 239         integrator_spd[31] = 64;
 240         s->cm_sdram |= 0x10;
 241     } else if (memsz >= 128) {
 242         integrator_spd[31] = 32;
 243         s->cm_sdram |= 0x0c;
 244     } else if (memsz >= 64) {
 245         integrator_spd[31] = 16;
 246         s->cm_sdram |= 0x08;
 247     } else if (memsz >= 32) {
 248         integrator_spd[31] = 4;
 249         s->cm_sdram |= 0x04;
 250     } else {
 251         integrator_spd[31] = 2;
 252     }
 253     memcpy(integrator_spd + 73, "QEMU-MEMORY", 11);
 254     s->cm_init = 0x00000112;
 255     s->flash_offset = qemu_ram_alloc(0x100000);
 256
 257     iomemtype = cpu_register_io_memory(0, integratorcm_readfn,
 258                                        integratorcm_writefn, s);
 259     cpu_register_physical_memory(0x10000000, 0x00800000, iomemtype);
 260     integratorcm_do_remap(s, 1);
 261     /* ??? Save/restore.  */
 262 }
 263
 264 /* Integrator/CP hardware emulation.  */
 265 /* Primary interrupt controller.  */
 266
 267 typedef struct icp_pic_state
 268 {
 269   uint32_t level;
 270   uint32_t irq_enabled;
 271   uint32_t fiq_enabled;
 272   qemu_irq parent_irq;
 273   qemu_irq parent_fiq;
 274 } icp_pic_state;
 275
 276 static void icp_pic_update(icp_pic_state *s)
 277 {
 278     uint32_t flags;
 279
 280     flags = (s->level & s->irq_enabled);
 281     qemu_set_irq(s->parent_irq, flags != 0);
 282     flags = (s->level & s->fiq_enabled);
 283     qemu_set_irq(s->parent_fiq, flags != 0);
 284 }
 285
 286 static void icp_pic_set_irq(void *opaque, int irq, int level)
 287 {
 288     icp_pic_state *s = (icp_pic_state *)opaque;
 289     if (level)
 290         s->level |= 1 << irq;
 291     else
 292         s->level &= ~(1 << irq);
 293     icp_pic_update(s);
 294 }
 295
 296 static uint32_t icp_pic_read(void *opaque, target_phys_addr_t offset)
 297 {
 298     icp_pic_state *s = (icp_pic_state *)opaque;
 299
 300     switch (offset >> 2) {
 301     case 0: /* IRQ_STATUS */
 302         return s->level & s->irq_enabled;
 303     case 1: /* IRQ_RAWSTAT */
 304         return s->level;
 305     case 2: /* IRQ_ENABLESET */
 306         return s->irq_enabled;
 307     case 4: /* INT_SOFTSET */
 308         return s->level & 1;
 309     case 8: /* FRQ_STATUS */
 310         return s->level & s->fiq_enabled;
 311     case 9: /* FRQ_RAWSTAT */
 312         return s->level;
 313     case 10: /* FRQ_ENABLESET */
 314         return s->fiq_enabled;
 315     case 3: /* IRQ_ENABLECLR */
 316     case 5: /* INT_SOFTCLR */
 317     case 11: /* FRQ_ENABLECLR */
 318     default:
 319         printf ("icp_pic_read: Bad register offset 0x%x\n", (int)offset);
 320         return 0;
 321     }
 322 }
 323
 324 static void icp_pic_write(void *opaque, target_phys_addr_t offset,
 325                           uint32_t value)
 326 {
 327     icp_pic_state *s = (icp_pic_state *)opaque;
 328
 329     switch (offset >> 2) {
 330     case 2: /* IRQ_ENABLESET */
 331         s->irq_enabled |= value;
 332         break;
 333     case 3: /* IRQ_ENABLECLR */
 334         s->irq_enabled &= ~value;
 335         break;
 336     case 4: /* INT_SOFTSET */
 337         if (value & 1)
 338             icp_pic_set_irq(s, 0, 1);
 339         break;
 340     case 5: /* INT_SOFTCLR */
 341         if (value & 1)
 342             icp_pic_set_irq(s, 0, 0);
 343         break;
 344     case 10: /* FRQ_ENABLESET */
 345         s->fiq_enabled |= value;
 346         break;
 347     case 11: /* FRQ_ENABLECLR */
 348         s->fiq_enabled &= ~value;
 349         break;
 350     case 0: /* IRQ_STATUS */
 351     case 1: /* IRQ_RAWSTAT */
 352     case 8: /* FRQ_STATUS */
 353     case 9: /* FRQ_RAWSTAT */
 354     default:
 355         printf ("icp_pic_write: Bad register offset 0x%x\n", (int)offset);
 356         return;
 357     }
 358     icp_pic_update(s);
 359 }
 360
 361 static CPUReadMemoryFunc *icp_pic_readfn[] = {
 362    icp_pic_read,
 363    icp_pic_read,
 364    icp_pic_read
 365 };
 366
 367 static CPUWriteMemoryFunc *icp_pic_writefn[] = {
 368    icp_pic_write,
 369    icp_pic_write,
 370    icp_pic_write
 371 };
 372
 373 static qemu_irq *icp_pic_init(uint32_t base,
 374                               qemu_irq parent_irq, qemu_irq parent_fiq)
 375 {
 376     icp_pic_state *s;
 377     int iomemtype;
 378     qemu_irq *qi;
 379
 380     s = (icp_pic_state *)qemu_mallocz(sizeof(icp_pic_state));
 381     qi = qemu_allocate_irqs(icp_pic_set_irq, s, 32);
 382     s->parent_irq = parent_irq;
 383     s->parent_fiq = parent_fiq;
 384     iomemtype = cpu_register_io_memory(0, icp_pic_readfn,
 385                                        icp_pic_writefn, s);
 386     cpu_register_physical_memory(base, 0x00800000, iomemtype);
 387     /* ??? Save/restore.  */
 388     return qi;
 389 }
 390
 391 /* CP control registers.  */
 392 static uint32_t icp_control_read(void *opaque, target_phys_addr_t offset)
 393 {
 394     switch (offset >> 2) {
 395     case 0: /* CP_IDFIELD */
 396         return 0x41034003;
 397     case 1: /* CP_FLASHPROG */
 398         return 0;
 399     case 2: /* CP_INTREG */
 400         return 0;
 401     case 3: /* CP_DECODE */
 402         return 0x11;
 403     default:
 404         cpu_abort (cpu_single_env, "icp_control_read: Bad offset %x\n",
 405                    (int)offset);
 406         return 0;
 407     }
 408 }
 409
 410 static void icp_control_write(void *opaque, target_phys_addr_t offset,
 411                           uint32_t value)
 412 {
 413     switch (offset >> 2) {
 414     case 1: /* CP_FLASHPROG */
 415     case 2: /* CP_INTREG */
 416     case 3: /* CP_DECODE */
 417         /* Nothing interesting implemented yet.  */
 418         break;
 419     default:
 420         cpu_abort (cpu_single_env, "icp_control_write: Bad offset %x\n",
 421                    (int)offset);
 422     }
 423 }
 424 static CPUReadMemoryFunc *icp_control_readfn[] = {
 425    icp_control_read,
 426    icp_control_read,
 427    icp_control_read
 428 };
 429
 430 static CPUWriteMemoryFunc *icp_control_writefn[] = {
 431    icp_control_write,
 432    icp_control_write,
 433    icp_control_write
 434 };
 435
 436 static void icp_control_init(uint32_t base)
 437 {
 438     int iomemtype;
 439
 440     iomemtype = cpu_register_io_memory(0, icp_control_readfn,
 441                                        icp_control_writefn, NULL);
 442     cpu_register_physical_memory(base, 0x00800000, iomemtype);
 443     /* ??? Save/restore.  */
 444 }
 445
 446
 447 /* Board init.  */
 448
 449 static struct arm_boot_info integrator_binfo = {
 450     .loader_start = 0x0,
 451     .board_id = 0x113,
 452 };
 453
 454 static void integratorcp_init(ram_addr_t ram_size, int vga_ram_size,
 455                      const char *boot_device,
 456                      const char *kernel_filename, const char *kernel_cmdline,
 457                      const char *initrd_filename, const char *cpu_model)
 458 {
 459     CPUState *env;
 460     uint32_t ram_offset;
 461     qemu_irq *pic;
 462     qemu_irq *cpu_pic;
 463     int sd;
 464
 465     if (!cpu_model)
 466         cpu_model = "arm926";
 467     env = cpu_init(cpu_model);
 468     if (!env) {
 469         fprintf(stderr, "Unable to find CPU definition\n");
 470         exit(1);
 471     }
 472     ram_offset = qemu_ram_alloc(ram_size);
 473     /* ??? On a real system the first 1Mb is mapped as SSRAM or boot flash.  */
 474     /* ??? RAM should repeat to fill physical memory space.  */
 475     /* SDRAM at address zero*/
 476     cpu_register_physical_memory(0, ram_size, ram_offset | IO_MEM_RAM);
 477     /* And again at address 0x80000000 */
 478     cpu_register_physical_memory(0x80000000, ram_size, ram_offset | IO_MEM_RAM);
 479
 480     integratorcm_init(ram_size >> 20);
 481     cpu_pic = arm_pic_init_cpu(env);
 482     pic = icp_pic_init(0x14000000, cpu_pic[ARM_PIC_CPU_IRQ],
 483                        cpu_pic[ARM_PIC_CPU_FIQ]);
 484     icp_pic_init(0xca000000, pic[26], NULL);
 485     icp_pit_init(0x13000000, pic, 5);
 486     pl031_init(0x15000000, pic[8]);
 487     pl011_init(0x16000000, pic[1], serial_hds[0], PL011_ARM);
 488     pl011_init(0x17000000, pic[2], serial_hds[1], PL011_ARM);
 489     icp_control_init(0xcb000000);
 490     pl050_init(0x18000000, pic[3], 0);
 491     pl050_init(0x19000000, pic[4], 1);
 492     sd = drive_get_index(IF_SD, 0, 0);
 493     if (sd == -1) {
 494         fprintf(stderr, "qemu: missing SecureDigital card\n");
 495         exit(1);
 496     }
 497     pl181_init(0x1c000000, drives_table[sd].bdrv, pic[23], pic[24]);
 498     if (nd_table[0].vlan)
 499         smc91c111_init(&nd_table[0], 0xc8000000, pic[27]);
 500     pl110_init(0xc0000000, pic[22], 0);
 501
 502     integrator_binfo.ram_size = ram_size;
 503     integrator_binfo.kernel_filename = kernel_filename;
 504     integrator_binfo.kernel_cmdline = kernel_cmdline;
 505     integrator_binfo.initrd_filename = initrd_filename;
 506     arm_load_kernel(env, &integrator_binfo);
 507 }
 508
 509 QEMUMachine integratorcp_machine = {
 510     .name = "integratorcp",
 511     .desc = "ARM Integrator/CP (ARM926EJ-S)",
 512     .init = integratorcp_init,
 513     .ram_require = 0x100000,
 514 };