hw/rc4030.c

   1 /*
   2  * QEMU JAZZ RC4030 chipset
   3  *
   4  * Copyright (c) 2007-2008 Hervé Poussineau
   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 #include "hw.h"
  26 #include "qemu-timer.h"
  27
  28 //#define DEBUG_RC4030
  29
  30 #ifdef DEBUG_RC4030
  31 static const char* irq_names[] = { "parallel", "floppy", "sound", "video",
  32             "network", "scsi", "keyboard", "mouse", "serial0", "serial1" };
  33 #endif
  34
  35 typedef struct rc4030State
  36 {
  37     uint32_t config; /* 0x0000: RC4030 config register */
  38     uint32_t invalid_address_register; /* 0x0010: Invalid Address register */
  39
  40     /* DMA */
  41     uint32_t dma_regs[8][4];
  42     uint32_t dma_tl_base; /* 0x0018: DMA transl. table base */
  43     uint32_t dma_tl_limit; /* 0x0020: DMA transl. table limit */
  44
  45     /* cache */
  46     uint32_t remote_failed_address; /* 0x0038: Remote Failed Address */
  47     uint32_t memory_failed_address; /* 0x0040: Memory Failed Address */
  48     uint32_t cache_ptag; /* 0x0048: I/O Cache Physical Tag */
  49     uint32_t cache_ltag; /* 0x0050: I/O Cache Logical Tag */
  50     uint32_t cache_bmask; /* 0x0058: I/O Cache Byte Mask */
  51     uint32_t cache_bwin; /* 0x0060: I/O Cache Buffer Window */
  52
  53     uint32_t offset208;
  54     uint32_t offset210;
  55     uint32_t nvram_protect; /* 0x0220: NV ram protect register */
  56     uint32_t offset238;
  57     uint32_t rem_speed[15];
  58     uint32_t imr_jazz; /* Local bus int enable mask */
  59     uint32_t isr_jazz; /* Local bus int source */
  60
  61     /* timer */
  62     QEMUTimer *periodic_timer;
  63     uint32_t itr; /* Interval timer reload */
  64
  65     uint32_t dummy32;
  66     qemu_irq timer_irq;
  67     qemu_irq jazz_bus_irq;
  68 } rc4030State;
  69
  70 static void set_next_tick(rc4030State *s)
  71 {
  72     qemu_irq_lower(s->timer_irq);
  73     uint32_t hz;
  74
  75     hz = 1000 / (s->itr + 1);
  76
  77     qemu_mod_timer(s->periodic_timer, qemu_get_clock(vm_clock) + ticks_per_sec / hz);
  78 }
  79
  80 /* called for accesses to rc4030 */
  81 static uint32_t rc4030_readl(void *opaque, target_phys_addr_t addr)
  82 {
  83     rc4030State *s = opaque;
  84     uint32_t val;
  85
  86     addr &= 0x3fff;
  87     switch (addr & ~0x3) {
  88     /* Global config register */
  89     case 0x0000:
  90         val = s->config;
  91         break;
  92     /* Invalid Address register */
  93     case 0x0010:
  94         val = s->invalid_address_register;
  95         break;
  96     /* DMA transl. table base */
  97     case 0x0018:
  98         val = s->dma_tl_base;
  99         break;
 100     /* DMA transl. table limit */
 101     case 0x0020:
 102         val = s->dma_tl_limit;
 103         break;
 104     /* Remote Failed Address */
 105     case 0x0038:
 106         val = s->remote_failed_address;
 107         break;
 108     /* Memory Failed Address */
 109     case 0x0040:
 110         val = s->memory_failed_address;
 111         break;
 112     /* I/O Cache Byte Mask */
 113     case 0x0058:
 114         val = s->cache_bmask;
 115         /* HACK */
 116         if (s->cache_bmask == (uint32_t)-1)
 117             s->cache_bmask = 0;
 118         break;
 119     /* Remote Speed Registers */
 120     case 0x0070:
 121     case 0x0078:
 122     case 0x0080:
 123     case 0x0088:
 124     case 0x0090:
 125     case 0x0098:
 126     case 0x00a0:
 127     case 0x00a8:
 128     case 0x00b0:
 129     case 0x00b8:
 130     case 0x00c0:
 131     case 0x00c8:
 132     case 0x00d0:
 133     case 0x00d8:
 134     case 0x00e0:
 135         val = s->rem_speed[(addr - 0x0070) >> 3];
 136         break;
 137     /* DMA channel base address */
 138     case 0x0100:
 139     case 0x0108:
 140     case 0x0110:
 141     case 0x0118:
 142     case 0x0120:
 143     case 0x0128:
 144     case 0x0130:
 145     case 0x0138:
 146     case 0x0140:
 147     case 0x0148:
 148     case 0x0150:
 149     case 0x0158:
 150     case 0x0160:
 151     case 0x0168:
 152     case 0x0170:
 153     case 0x0178:
 154     case 0x0180:
 155     case 0x0188:
 156     case 0x0190:
 157     case 0x0198:
 158     case 0x01a0:
 159     case 0x01a8:
 160     case 0x01b0:
 161     case 0x01b8:
 162     case 0x01c0:
 163     case 0x01c8:
 164     case 0x01d0:
 165     case 0x01d8:
 166     case 0x01e0:
 167     case 0x1e8:
 168     case 0x01f0:
 169     case 0x01f8:
 170         {
 171             int entry = (addr - 0x0100) >> 5;
 172             int idx = (addr & 0x1f) >> 3;
 173             val = s->dma_regs[entry][idx];
 174         }
 175         break;
 176     /* Offset 0x0208 */
 177     case 0x0208:
 178         val = s->offset208;
 179         break;
 180     /* Offset 0x0210 */
 181     case 0x0210:
 182         val = s->offset210;
 183         break;
 184     /* NV ram protect register */
 185     case 0x0220:
 186         val = s->nvram_protect;
 187         break;
 188     /* Interval timer count */
 189     case 0x0230:
 190         val = s->dummy32;
 191         qemu_irq_lower(s->timer_irq);
 192         break;
 193     /* Offset 0x0238 */
 194     case 0x0238:
 195         val = s->offset238;
 196         break;
 197     default:
 198 #ifdef DEBUG_RC4030
 199         printf("rc4030: invalid read [" TARGET_FMT_lx "]\n", addr);
 200 #endif
 201         val = 0;
 202         break;
 203     }
 204
 205 #ifdef DEBUG_RC4030
 206     if ((addr & ~3) != 0x230)
 207         printf("rc4030: read 0x%02x at " TARGET_FMT_lx "\n", val, addr);
 208 #endif
 209
 210     return val;
 211 }
 212
 213 static uint32_t rc4030_readw(void *opaque, target_phys_addr_t addr)
 214 {
 215     uint32_t v = rc4030_readl(opaque, addr & ~0x3);
 216     if (addr & 0x2)
 217         return v >> 16;
 218     else
 219         return v & 0xffff;
 220 }
 221
 222 static uint32_t rc4030_readb(void *opaque, target_phys_addr_t addr)
 223 {
 224     uint32_t v = rc4030_readl(opaque, addr & ~0x3);
 225     return (v >> (8 * (addr & 0x3))) & 0xff;
 226 }
 227
 228 static void rc4030_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 229 {
 230     rc4030State *s = opaque;
 231     addr &= 0x3fff;
 232
 233 #ifdef DEBUG_RC4030
 234     printf("rc4030: write 0x%02x at " TARGET_FMT_lx "\n", val, addr);
 235 #endif
 236
 237     switch (addr & ~0x3) {
 238     /* Global config register */
 239     case 0x0000:
 240         s->config = val;
 241         break;
 242     /* DMA transl. table base */
 243     case 0x0018:
 244         s->dma_tl_base = val;
 245         break;
 246     /* DMA transl. table limit */
 247     case 0x0020:
 248         s->dma_tl_limit = val;
 249         break;
 250     /* I/O Cache Physical Tag */
 251     case 0x0048:
 252         s->cache_ptag = val;
 253         break;
 254     /* I/O Cache Logical Tag */
 255     case 0x0050:
 256         s->cache_ltag = val;
 257         break;
 258     /* I/O Cache Byte Mask */
 259     case 0x0058:
 260         s->cache_bmask |= val; /* HACK */
 261         break;
 262     /* I/O Cache Buffer Window */
 263     case 0x0060:
 264         s->cache_bwin = val;
 265         /* HACK */
 266         if (s->cache_ltag == 0x80000001 && s->cache_bmask == 0xf0f0f0f) {
 267             target_phys_addr_t dests[] = { 4, 0, 8, 0x10 };
 268             static int current = 0;
 269             target_phys_addr_t dest = 0 + dests[current];
 270             uint8_t buf;
 271             current = (current + 1) % (sizeof(dests)/sizeof(dests[0]));
 272             buf = s->cache_bwin - 1;
 273             cpu_physical_memory_rw(dest, &buf, 1, 1);
 274         }
 275         break;
 276     /* Remote Speed Registers */
 277     case 0x0070:
 278     case 0x0078:
 279     case 0x0080:
 280     case 0x0088:
 281     case 0x0090:
 282     case 0x0098:
 283     case 0x00a0:
 284     case 0x00a8:
 285     case 0x00b0:
 286     case 0x00b8:
 287     case 0x00c0:
 288     case 0x00c8:
 289     case 0x00d0:
 290     case 0x00d8:
 291     case 0x00e0:
 292         s->rem_speed[(addr - 0x0070) >> 3] = val;
 293         break;
 294     /* DMA channel base address */
 295     case 0x0100:
 296     case 0x0108:
 297     case 0x0110:
 298     case 0x0118:
 299     case 0x0120:
 300     case 0x0128:
 301     case 0x0130:
 302     case 0x0138:
 303     case 0x0140:
 304     case 0x0148:
 305     case 0x0150:
 306     case 0x0158:
 307     case 0x0160:
 308     case 0x0168:
 309     case 0x0170:
 310     case 0x0178:
 311     case 0x0180:
 312     case 0x0188:
 313     case 0x0190:
 314     case 0x0198:
 315     case 0x01a0:
 316     case 0x01a8:
 317     case 0x01b0:
 318     case 0x01b8:
 319     case 0x01c0:
 320     case 0x01c8:
 321     case 0x01d0:
 322     case 0x01d8:
 323     case 0x01e0:
 324     case 0x1e8:
 325     case 0x01f0:
 326     case 0x01f8:
 327         {
 328             int entry = (addr - 0x0100) >> 5;
 329             int idx = (addr & 0x1f) >> 3;
 330             s->dma_regs[entry][idx] = val;
 331         }
 332         break;
 333     /* Offset 0x0210 */
 334     case 0x0210:
 335         s->offset210 = val;
 336         break;
 337     /* Interval timer reload */
 338     case 0x0228:
 339         s->itr = val;
 340         qemu_irq_lower(s->timer_irq);
 341         set_next_tick(s);
 342         break;
 343     default:
 344 #ifdef DEBUG_RC4030
 345         printf("rc4030: invalid write of 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
 346 #endif
 347         break;
 348     }
 349 }
 350
 351 static void rc4030_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
 352 {
 353     uint32_t old_val = rc4030_readl(opaque, addr & ~0x3);
 354
 355     if (addr & 0x2)
 356         val = (val << 16) | (old_val & 0x0000ffff);
 357     else
 358         val = val | (old_val & 0xffff0000);
 359     rc4030_writel(opaque, addr & ~0x3, val);
 360 }
 361
 362 static void rc4030_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
 363 {
 364     uint32_t old_val = rc4030_readl(opaque, addr & ~0x3);
 365
 366     switch (addr & 3) {
 367     case 0:
 368         val = val | (old_val & 0xffffff00);
 369         break;
 370     case 1:
 371         val = (val << 8) | (old_val & 0xffff00ff);
 372         break;
 373     case 2:
 374         val = (val << 16) | (old_val & 0xff00ffff);
 375         break;
 376     case 3:
 377         val = (val << 24) | (old_val & 0x00ffffff);
 378         break;
 379     }
 380     rc4030_writel(opaque, addr & ~0x3, val);
 381 }
 382
 383 static CPUReadMemoryFunc *rc4030_read[3] = {
 384     rc4030_readb,
 385     rc4030_readw,
 386     rc4030_readl,
 387 };
 388
 389 static CPUWriteMemoryFunc *rc4030_write[3] = {
 390     rc4030_writeb,
 391     rc4030_writew,
 392     rc4030_writel,
 393 };
 394
 395 static void update_jazz_irq(rc4030State *s)
 396 {
 397     uint16_t pending;
 398
 399     pending = s->isr_jazz & s->imr_jazz;
 400
 401 #ifdef DEBUG_RC4030
 402     if (s->isr_jazz != 0) {
 403         uint32_t irq = 0;
 404         printf("jazz pending:");
 405         for (irq = 0; irq < sizeof(irq_names)/sizeof(irq_names[0]); irq++) {
 406             if (s->isr_jazz & (1 << irq)) {
 407                 printf(" %s", irq_names[irq]);
 408                 if (!(s->imr_jazz & (1 << irq))) {
 409                     printf("(ignored)");
 410                 }
 411             }
 412         }
 413         printf("\n");
 414     }
 415 #endif
 416
 417     if (pending != 0)
 418         qemu_irq_raise(s->jazz_bus_irq);
 419     else
 420         qemu_irq_lower(s->jazz_bus_irq);
 421 }
 422
 423 static void rc4030_irq_jazz_request(void *opaque, int irq, int level)
 424 {
 425     rc4030State *s = opaque;
 426
 427     if (level) {
 428         s->isr_jazz |= 1 << irq;
 429     } else {
 430         s->isr_jazz &= ~(1 << irq);
 431     }
 432
 433     update_jazz_irq(s);
 434 }
 435
 436 static void rc4030_periodic_timer(void *opaque)
 437 {
 438     rc4030State *s = opaque;
 439
 440     set_next_tick(s);
 441     qemu_irq_raise(s->timer_irq);
 442 }
 443
 444 static uint32_t int_readb(void *opaque, target_phys_addr_t addr)
 445 {
 446     rc4030State *s = opaque;
 447     uint32_t val;
 448     uint32_t irq;
 449     addr &= 0xfff;
 450
 451     switch (addr) {
 452     case 0x00: {
 453         /* Local bus int source */
 454         uint32_t pending = s->isr_jazz & s->imr_jazz;
 455         val = 0;
 456         irq = 0;
 457         while (pending) {
 458             if (pending & 1) {
 459                 //printf("returning irq %s\n", irq_names[irq]);
 460                 val = (irq + 1) << 2;
 461                 break;
 462             }
 463             irq++;
 464             pending >>= 1;
 465         }
 466         break;
 467     }
 468     default:
 469 #ifdef DEBUG_RC4030
 470             printf("rc4030: (interrupt controller) invalid read [" TARGET_FMT_lx "]\n", addr);
 471 #endif
 472             val = 0;
 473     }
 474
 475 #ifdef DEBUG_RC4030
 476     printf("rc4030: (interrupt controller) read 0x%02x at " TARGET_FMT_lx "\n", val, addr);
 477 #endif
 478
 479     return val;
 480 }
 481
 482 static uint32_t int_readw(void *opaque, target_phys_addr_t addr)
 483 {
 484     uint32_t v;
 485     v = int_readb(opaque, addr);
 486     v |= int_readb(opaque, addr + 1) << 8;
 487     return v;
 488 }
 489
 490 static uint32_t int_readl(void *opaque, target_phys_addr_t addr)
 491 {
 492     uint32_t v;
 493     v = int_readb(opaque, addr);
 494     v |= int_readb(opaque, addr + 1) << 8;
 495     v |= int_readb(opaque, addr + 2) << 16;
 496     v |= int_readb(opaque, addr + 3) << 24;
 497     return v;
 498 }
 499
 500 static void int_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
 501 {
 502     rc4030State *s = opaque;
 503     addr &= 0xfff;
 504
 505 #ifdef DEBUG_RC4030
 506     printf("rc4030: (interrupt controller) write 0x%02x at " TARGET_FMT_lx "\n", val, addr);
 507 #endif
 508
 509     switch (addr) {
 510     /* Local bus int enable mask */
 511     case 0x02:
 512         s->imr_jazz = (s->imr_jazz & 0xff00) | (val << 0); update_jazz_irq(s);
 513         break;
 514     case 0x03:
 515         s->imr_jazz = (s->imr_jazz & 0x00ff) | (val << 8); update_jazz_irq(s);
 516         break;
 517     default:
 518 #ifdef DEBUG_RC4030
 519         printf("rc4030: (interrupt controller) invalid write of 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
 520 #endif
 521         break;
 522     }
 523 }
 524
 525 static void int_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
 526 {
 527     int_writeb(opaque, addr, val & 0xff);
 528     int_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 529 }
 530
 531 static void int_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 532 {
 533     int_writeb(opaque, addr, val & 0xff);
 534     int_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 535     int_writeb(opaque, addr + 2, (val >> 16) & 0xff);
 536     int_writeb(opaque, addr + 3, (val >> 24) & 0xff);
 537 }
 538
 539 static CPUReadMemoryFunc *int_read[3] = {
 540     int_readb,
 541     int_readw,
 542     int_readl,
 543 };
 544
 545 static CPUWriteMemoryFunc *int_write[3] = {
 546     int_writeb,
 547     int_writew,
 548     int_writel,
 549 };
 550
 551 #define G364_512KB_RAM (0x0)
 552 #define G364_2MB_RAM   (0x1)
 553 #define G364_8MB_RAM   (0x2)
 554 #define G364_32MB_RAM  (0x3)
 555
 556 static void rc4030_reset(void *opaque)
 557 {
 558     rc4030State *s = opaque;
 559     int i;
 560
 561     s->config = (G364_2MB_RAM << 8) | 0x04;
 562     s->invalid_address_register = 0;
 563
 564     memset(s->dma_regs, 0, sizeof(s->dma_regs));
 565     s->dma_tl_base = s->dma_tl_limit = 0;
 566
 567     s->remote_failed_address = s->memory_failed_address = 0;
 568     s->cache_ptag = s->cache_ltag = 0;
 569     s->cache_bmask = s->cache_bwin = 0;
 570
 571     s->offset208 = 0;
 572     s->offset210 = 0x18186;
 573     s->nvram_protect = 7;
 574     s->offset238 = 7;
 575     for (i = 0; i < 15; i++)
 576         s->rem_speed[i] = 7;
 577     s->imr_jazz = s->isr_jazz = 0;
 578
 579     s->itr = 0;
 580     s->dummy32 = 0;
 581
 582     qemu_irq_lower(s->timer_irq);
 583     qemu_irq_lower(s->jazz_bus_irq);
 584 }
 585
 586 qemu_irq *rc4030_init(qemu_irq timer, qemu_irq jazz_bus)
 587 {
 588     rc4030State *s;
 589     int s_chipset, s_int;
 590
 591     s = qemu_mallocz(sizeof(rc4030State));
 592     if (!s)
 593         return NULL;
 594
 595     s->periodic_timer = qemu_new_timer(vm_clock, rc4030_periodic_timer, s);
 596     s->timer_irq = timer;
 597     s->jazz_bus_irq = jazz_bus;
 598
 599     qemu_register_reset(rc4030_reset, s);
 600     rc4030_reset(s);
 601
 602     s_chipset = cpu_register_io_memory(0, rc4030_read, rc4030_write, s);
 603     cpu_register_physical_memory(0x80000000, 0x300, s_chipset);
 604     s_int = cpu_register_io_memory(0, int_read, int_write, s);
 605     cpu_register_physical_memory(0xf0000000, 0x00001000, s_int);
 606
 607     return qemu_allocate_irqs(rc4030_irq_jazz_request, s, 16);
 608 }