hw/cuda.c

   1 /*
   2  * QEMU PowerMac CUDA device support
   3  *
   4  * Copyright (c) 2004-2007 Fabrice Bellard
   5  * Copyright (c) 2007 Jocelyn Mayer
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25 #include "hw.h"
  26 #include "ppc_mac.h"
  27 #include "qemu-timer.h"
  28 #include "sysemu.h"
  29
  30 /* XXX: implement all timer modes */
  31
  32 /* debug CUDA */
  33 //#define DEBUG_CUDA
  34
  35 /* debug CUDA packets */
  36 //#define DEBUG_CUDA_PACKET
  37
  38 #ifdef DEBUG_CUDA
  39 #define CUDA_DPRINTF(fmt, ...)                                  \
  40     do { printf("CUDA: " fmt , ## __VA_ARGS__); } while (0)
  41 #else
  42 #define CUDA_DPRINTF(fmt, ...)
  43 #endif
  44
  45 /* Bits in B data register: all active low */
  46 #define TREQ            0x08            /* Transfer request (input) */
  47 #define TACK            0x10            /* Transfer acknowledge (output) */
  48 #define TIP             0x20            /* Transfer in progress (output) */
  49
  50 /* Bits in ACR */
  51 #define SR_CTRL         0x1c            /* Shift register control bits */
  52 #define SR_EXT          0x0c            /* Shift on external clock */
  53 #define SR_OUT          0x10            /* Shift out if 1 */
  54
  55 /* Bits in IFR and IER */
  56 #define IER_SET         0x80            /* set bits in IER */
  57 #define IER_CLR         0               /* clear bits in IER */
  58 #define SR_INT          0x04            /* Shift register full/empty */
  59 #define T1_INT          0x40            /* Timer 1 interrupt */
  60 #define T2_INT          0x20            /* Timer 2 interrupt */
  61
  62 /* Bits in ACR */
  63 #define T1MODE          0xc0            /* Timer 1 mode */
  64 #define T1MODE_CONT     0x40            /*  continuous interrupts */
  65
  66 /* commands (1st byte) */
  67 #define ADB_PACKET      0
  68 #define CUDA_PACKET     1
  69 #define ERROR_PACKET    2
  70 #define TIMER_PACKET    3
  71 #define POWER_PACKET    4
  72 #define MACIIC_PACKET   5
  73 #define PMU_PACKET      6
  74
  75
  76 /* CUDA commands (2nd byte) */
  77 #define CUDA_WARM_START                 0x0
  78 #define CUDA_AUTOPOLL                   0x1
  79 #define CUDA_GET_6805_ADDR              0x2
  80 #define CUDA_GET_TIME                   0x3
  81 #define CUDA_GET_PRAM                   0x7
  82 #define CUDA_SET_6805_ADDR              0x8
  83 #define CUDA_SET_TIME                   0x9
  84 #define CUDA_POWERDOWN                  0xa
  85 #define CUDA_POWERUP_TIME               0xb
  86 #define CUDA_SET_PRAM                   0xc
  87 #define CUDA_MS_RESET                   0xd
  88 #define CUDA_SEND_DFAC                  0xe
  89 #define CUDA_BATTERY_SWAP_SENSE         0x10
  90 #define CUDA_RESET_SYSTEM               0x11
  91 #define CUDA_SET_IPL                    0x12
  92 #define CUDA_FILE_SERVER_FLAG           0x13
  93 #define CUDA_SET_AUTO_RATE              0x14
  94 #define CUDA_GET_AUTO_RATE              0x16
  95 #define CUDA_SET_DEVICE_LIST            0x19
  96 #define CUDA_GET_DEVICE_LIST            0x1a
  97 #define CUDA_SET_ONE_SECOND_MODE        0x1b
  98 #define CUDA_SET_POWER_MESSAGES         0x21
  99 #define CUDA_GET_SET_IIC                0x22
 100 #define CUDA_WAKEUP                     0x23
 101 #define CUDA_TIMER_TICKLE               0x24
 102 #define CUDA_COMBINED_FORMAT_IIC        0x25
 103
 104 #define CUDA_TIMER_FREQ (4700000 / 6)
 105 #define CUDA_ADB_POLL_FREQ 50
 106
 107 /* CUDA returns time_t's offset from Jan 1, 1904, not 1970 */
 108 #define RTC_OFFSET                      2082844800
 109
 110 typedef struct CUDATimer {
 111     int index;
 112     uint16_t latch;
 113     uint16_t counter_value; /* counter value at load time */
 114     int64_t load_time;
 115     int64_t next_irq_time;
 116     QEMUTimer *timer;
 117 } CUDATimer;
 118
 119 typedef struct CUDAState {
 120     /* cuda registers */
 121     uint8_t b;      /* B-side data */
 122     uint8_t a;      /* A-side data */
 123     uint8_t dirb;   /* B-side direction (1=output) */
 124     uint8_t dira;   /* A-side direction (1=output) */
 125     uint8_t sr;     /* Shift register */
 126     uint8_t acr;    /* Auxiliary control register */
 127     uint8_t pcr;    /* Peripheral control register */
 128     uint8_t ifr;    /* Interrupt flag register */
 129     uint8_t ier;    /* Interrupt enable register */
 130     uint8_t anh;    /* A-side data, no handshake */
 131
 132     CUDATimer timers[2];
 133
 134     uint32_t tick_offset;
 135
 136     uint8_t last_b; /* last value of B register */
 137     uint8_t last_acr; /* last value of B register */
 138
 139     int data_in_size;
 140     int data_in_index;
 141     int data_out_index;
 142
 143     qemu_irq irq;
 144     uint8_t autopoll;
 145     uint8_t data_in[128];
 146     uint8_t data_out[16];
 147     QEMUTimer *adb_poll_timer;
 148 } CUDAState;
 149
 150 static CUDAState cuda_state;
 151 ADBBusState adb_bus;
 152
 153 static void cuda_update(CUDAState *s);
 154 static void cuda_receive_packet_from_host(CUDAState *s,
 155                                           const uint8_t *data, int len);
 156 static void cuda_timer_update(CUDAState *s, CUDATimer *ti,
 157                               int64_t current_time);
 158
 159 static void cuda_update_irq(CUDAState *s)
 160 {
 161     if (s->ifr & s->ier & (SR_INT | T1_INT)) {
 162         qemu_irq_raise(s->irq);
 163     } else {
 164         qemu_irq_lower(s->irq);
 165     }
 166 }
 167
 168 static unsigned int get_counter(CUDATimer *s)
 169 {
 170     int64_t d;
 171     unsigned int counter;
 172
 173     d = muldiv64(qemu_get_clock(vm_clock) - s->load_time,
 174                  CUDA_TIMER_FREQ, ticks_per_sec);
 175     if (s->index == 0) {
 176         /* the timer goes down from latch to -1 (period of latch + 2) */
 177         if (d <= (s->counter_value + 1)) {
 178             counter = (s->counter_value - d) & 0xffff;
 179         } else {
 180             counter = (d - (s->counter_value + 1)) % (s->latch + 2);
 181             counter = (s->latch - counter) & 0xffff;
 182         }
 183     } else {
 184         counter = (s->counter_value - d) & 0xffff;
 185     }
 186     return counter;
 187 }
 188
 189 static void set_counter(CUDAState *s, CUDATimer *ti, unsigned int val)
 190 {
 191     CUDA_DPRINTF("T%d.counter=%d\n", 1 + (ti->timer == NULL), val);
 192     ti->load_time = qemu_get_clock(vm_clock);
 193     ti->counter_value = val;
 194     cuda_timer_update(s, ti, ti->load_time);
 195 }
 196
 197 static int64_t get_next_irq_time(CUDATimer *s, int64_t current_time)
 198 {
 199     int64_t d, next_time;
 200     unsigned int counter;
 201
 202     /* current counter value */
 203     d = muldiv64(current_time - s->load_time,
 204                  CUDA_TIMER_FREQ, ticks_per_sec);
 205     /* the timer goes down from latch to -1 (period of latch + 2) */
 206     if (d <= (s->counter_value + 1)) {
 207         counter = (s->counter_value - d) & 0xffff;
 208     } else {
 209         counter = (d - (s->counter_value + 1)) % (s->latch + 2);
 210         counter = (s->latch - counter) & 0xffff;
 211     }
 212
 213     /* Note: we consider the irq is raised on 0 */
 214     if (counter == 0xffff) {
 215         next_time = d + s->latch + 1;
 216     } else if (counter == 0) {
 217         next_time = d + s->latch + 2;
 218     } else {
 219         next_time = d + counter;
 220     }
 221     CUDA_DPRINTF("latch=%d counter=%" PRId64 " delta_next=%" PRId64 "\n",
 222                  s->latch, d, next_time - d);
 223     next_time = muldiv64(next_time, ticks_per_sec, CUDA_TIMER_FREQ) +
 224         s->load_time;
 225     if (next_time <= current_time)
 226         next_time = current_time + 1;
 227     return next_time;
 228 }
 229
 230 static void cuda_timer_update(CUDAState *s, CUDATimer *ti,
 231                               int64_t current_time)
 232 {
 233     if (!ti->timer)
 234         return;
 235     if ((s->acr & T1MODE) != T1MODE_CONT) {
 236         qemu_del_timer(ti->timer);
 237     } else {
 238         ti->next_irq_time = get_next_irq_time(ti, current_time);
 239         qemu_mod_timer(ti->timer, ti->next_irq_time);
 240     }
 241 }
 242
 243 static void cuda_timer1(void *opaque)
 244 {
 245     CUDAState *s = opaque;
 246     CUDATimer *ti = &s->timers[0];
 247
 248     cuda_timer_update(s, ti, ti->next_irq_time);
 249     s->ifr |= T1_INT;
 250     cuda_update_irq(s);
 251 }
 252
 253 static uint32_t cuda_readb(void *opaque, target_phys_addr_t addr)
 254 {
 255     CUDAState *s = opaque;
 256     uint32_t val;
 257
 258     addr = (addr >> 9) & 0xf;
 259     switch(addr) {
 260     case 0:
 261         val = s->b;
 262         break;
 263     case 1:
 264         val = s->a;
 265         break;
 266     case 2:
 267         val = s->dirb;
 268         break;
 269     case 3:
 270         val = s->dira;
 271         break;
 272     case 4:
 273         val = get_counter(&s->timers[0]) & 0xff;
 274         s->ifr &= ~T1_INT;
 275         cuda_update_irq(s);
 276         break;
 277     case 5:
 278         val = get_counter(&s->timers[0]) >> 8;
 279         cuda_update_irq(s);
 280         break;
 281     case 6:
 282         val = s->timers[0].latch & 0xff;
 283         break;
 284     case 7:
 285         /* XXX: check this */
 286         val = (s->timers[0].latch >> 8) & 0xff;
 287         break;
 288     case 8:
 289         val = get_counter(&s->timers[1]) & 0xff;
 290         s->ifr &= ~T2_INT;
 291         break;
 292     case 9:
 293         val = get_counter(&s->timers[1]) >> 8;
 294         break;
 295     case 10:
 296         val = s->sr;
 297         s->ifr &= ~SR_INT;
 298         cuda_update_irq(s);
 299         break;
 300     case 11:
 301         val = s->acr;
 302         break;
 303     case 12:
 304         val = s->pcr;
 305         break;
 306     case 13:
 307         val = s->ifr;
 308         if (s->ifr & s->ier)
 309             val |= 0x80;
 310         break;
 311     case 14:
 312         val = s->ier | 0x80;
 313         break;
 314     default:
 315     case 15:
 316         val = s->anh;
 317         break;
 318     }
 319     if (addr != 13 || val != 0)
 320         CUDA_DPRINTF("read: reg=0x%x val=%02x\n", (int)addr, val);
 321     return val;
 322 }
 323
 324 static void cuda_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
 325 {
 326     CUDAState *s = opaque;
 327
 328     addr = (addr >> 9) & 0xf;
 329     CUDA_DPRINTF("write: reg=0x%x val=%02x\n", (int)addr, val);
 330
 331     switch(addr) {
 332     case 0:
 333         s->b = val;
 334         cuda_update(s);
 335         break;
 336     case 1:
 337         s->a = val;
 338         break;
 339     case 2:
 340         s->dirb = val;
 341         break;
 342     case 3:
 343         s->dira = val;
 344         break;
 345     case 4:
 346         s->timers[0].latch = (s->timers[0].latch & 0xff00) | val;
 347         cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
 348         break;
 349     case 5:
 350         s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8);
 351         s->ifr &= ~T1_INT;
 352         set_counter(s, &s->timers[0], s->timers[0].latch);
 353         break;
 354     case 6:
 355         s->timers[0].latch = (s->timers[0].latch & 0xff00) | val;
 356         cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
 357         break;
 358     case 7:
 359         s->timers[0].latch = (s->timers[0].latch & 0xff) | (val << 8);
 360         s->ifr &= ~T1_INT;
 361         cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
 362         break;
 363     case 8:
 364         s->timers[1].latch = val;
 365         set_counter(s, &s->timers[1], val);
 366         break;
 367     case 9:
 368         set_counter(s, &s->timers[1], (val << 8) | s->timers[1].latch);
 369         break;
 370     case 10:
 371         s->sr = val;
 372         break;
 373     case 11:
 374         s->acr = val;
 375         cuda_timer_update(s, &s->timers[0], qemu_get_clock(vm_clock));
 376         cuda_update(s);
 377         break;
 378     case 12:
 379         s->pcr = val;
 380         break;
 381     case 13:
 382         /* reset bits */
 383         s->ifr &= ~val;
 384         cuda_update_irq(s);
 385         break;
 386     case 14:
 387         if (val & IER_SET) {
 388             /* set bits */
 389             s->ier |= val & 0x7f;
 390         } else {
 391             /* reset bits */
 392             s->ier &= ~val;
 393         }
 394         cuda_update_irq(s);
 395         break;
 396     default:
 397     case 15:
 398         s->anh = val;
 399         break;
 400     }
 401 }
 402
 403 /* NOTE: TIP and TREQ are negated */
 404 static void cuda_update(CUDAState *s)
 405 {
 406     int packet_received, len;
 407
 408     packet_received = 0;
 409     if (!(s->b & TIP)) {
 410         /* transfer requested from host */
 411
 412         if (s->acr & SR_OUT) {
 413             /* data output */
 414             if ((s->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) {
 415                 if (s->data_out_index < sizeof(s->data_out)) {
 416                     CUDA_DPRINTF("send: %02x\n", s->sr);
 417                     s->data_out[s->data_out_index++] = s->sr;
 418                     s->ifr |= SR_INT;
 419                     cuda_update_irq(s);
 420                 }
 421             }
 422         } else {
 423             if (s->data_in_index < s->data_in_size) {
 424                 /* data input */
 425                 if ((s->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) {
 426                     s->sr = s->data_in[s->data_in_index++];
 427                     CUDA_DPRINTF("recv: %02x\n", s->sr);
 428                     /* indicate end of transfer */
 429                     if (s->data_in_index >= s->data_in_size) {
 430                         s->b = (s->b | TREQ);
 431                     }
 432                     s->ifr |= SR_INT;
 433                     cuda_update_irq(s);
 434                 }
 435             }
 436         }
 437     } else {
 438         /* no transfer requested: handle sync case */
 439         if ((s->last_b & TIP) && (s->b & TACK) != (s->last_b & TACK)) {
 440             /* update TREQ state each time TACK change state */
 441             if (s->b & TACK)
 442                 s->b = (s->b | TREQ);
 443             else
 444                 s->b = (s->b & ~TREQ);
 445             s->ifr |= SR_INT;
 446             cuda_update_irq(s);
 447         } else {
 448             if (!(s->last_b & TIP)) {
 449                 /* handle end of host to cuda transfer */
 450                 packet_received = (s->data_out_index > 0);
 451                 /* always an IRQ at the end of transfer */
 452                 s->ifr |= SR_INT;
 453                 cuda_update_irq(s);
 454             }
 455             /* signal if there is data to read */
 456             if (s->data_in_index < s->data_in_size) {
 457                 s->b = (s->b & ~TREQ);
 458             }
 459         }
 460     }
 461
 462     s->last_acr = s->acr;
 463     s->last_b = s->b;
 464
 465     /* NOTE: cuda_receive_packet_from_host() can call cuda_update()
 466        recursively */
 467     if (packet_received) {
 468         len = s->data_out_index;
 469         s->data_out_index = 0;
 470         cuda_receive_packet_from_host(s, s->data_out, len);
 471     }
 472 }
 473
 474 static void cuda_send_packet_to_host(CUDAState *s,
 475                                      const uint8_t *data, int len)
 476 {
 477 #ifdef DEBUG_CUDA_PACKET
 478     {
 479         int i;
 480         printf("cuda_send_packet_to_host:\n");
 481         for(i = 0; i < len; i++)
 482             printf(" %02x", data[i]);
 483         printf("\n");
 484     }
 485 #endif
 486     memcpy(s->data_in, data, len);
 487     s->data_in_size = len;
 488     s->data_in_index = 0;
 489     cuda_update(s);
 490     s->ifr |= SR_INT;
 491     cuda_update_irq(s);
 492 }
 493
 494 static void cuda_adb_poll(void *opaque)
 495 {
 496     CUDAState *s = opaque;
 497     uint8_t obuf[ADB_MAX_OUT_LEN + 2];
 498     int olen;
 499
 500     olen = adb_poll(&adb_bus, obuf + 2);
 501     if (olen > 0) {
 502         obuf[0] = ADB_PACKET;
 503         obuf[1] = 0x40; /* polled data */
 504         cuda_send_packet_to_host(s, obuf, olen + 2);
 505     }
 506     qemu_mod_timer(s->adb_poll_timer,
 507                    qemu_get_clock(vm_clock) +
 508                    (ticks_per_sec / CUDA_ADB_POLL_FREQ));
 509 }
 510
 511 static void cuda_receive_packet(CUDAState *s,
 512                                 const uint8_t *data, int len)
 513 {
 514     uint8_t obuf[16];
 515     int autopoll;
 516     uint32_t ti;
 517
 518     switch(data[0]) {
 519     case CUDA_AUTOPOLL:
 520         autopoll = (data[1] != 0);
 521         if (autopoll != s->autopoll) {
 522             s->autopoll = autopoll;
 523             if (autopoll) {
 524                 qemu_mod_timer(s->adb_poll_timer,
 525                                qemu_get_clock(vm_clock) +
 526                                (ticks_per_sec / CUDA_ADB_POLL_FREQ));
 527             } else {
 528                 qemu_del_timer(s->adb_poll_timer);
 529             }
 530         }
 531         obuf[0] = CUDA_PACKET;
 532         obuf[1] = data[1];
 533         cuda_send_packet_to_host(s, obuf, 2);
 534         break;
 535     case CUDA_SET_TIME:
 536         ti = (((uint32_t)data[1]) << 24) + (((uint32_t)data[2]) << 16) + (((uint32_t)data[3]) << 8) + data[4];
 537         s->tick_offset = ti - (qemu_get_clock(vm_clock) / ticks_per_sec);
 538         obuf[0] = CUDA_PACKET;
 539         obuf[1] = 0;
 540         obuf[2] = 0;
 541         cuda_send_packet_to_host(s, obuf, 3);
 542         break;
 543     case CUDA_GET_TIME:
 544         ti = s->tick_offset + (qemu_get_clock(vm_clock) / ticks_per_sec);
 545         obuf[0] = CUDA_PACKET;
 546         obuf[1] = 0;
 547         obuf[2] = 0;
 548         obuf[3] = ti >> 24;
 549         obuf[4] = ti >> 16;
 550         obuf[5] = ti >> 8;
 551         obuf[6] = ti;
 552         cuda_send_packet_to_host(s, obuf, 7);
 553         break;
 554     case CUDA_FILE_SERVER_FLAG:
 555     case CUDA_SET_DEVICE_LIST:
 556     case CUDA_SET_AUTO_RATE:
 557     case CUDA_SET_POWER_MESSAGES:
 558         obuf[0] = CUDA_PACKET;
 559         obuf[1] = 0;
 560         cuda_send_packet_to_host(s, obuf, 2);
 561         break;
 562     case CUDA_POWERDOWN:
 563         obuf[0] = CUDA_PACKET;
 564         obuf[1] = 0;
 565         cuda_send_packet_to_host(s, obuf, 2);
 566         qemu_system_shutdown_request();
 567         break;
 568     case CUDA_RESET_SYSTEM:
 569         obuf[0] = CUDA_PACKET;
 570         obuf[1] = 0;
 571         cuda_send_packet_to_host(s, obuf, 2);
 572         qemu_system_reset_request();
 573         break;
 574     default:
 575         break;
 576     }
 577 }
 578
 579 static void cuda_receive_packet_from_host(CUDAState *s,
 580                                           const uint8_t *data, int len)
 581 {
 582 #ifdef DEBUG_CUDA_PACKET
 583     {
 584         int i;
 585         printf("cuda_receive_packet_from_host:\n");
 586         for(i = 0; i < len; i++)
 587             printf(" %02x", data[i]);
 588         printf("\n");
 589     }
 590 #endif
 591     switch(data[0]) {
 592     case ADB_PACKET:
 593         {
 594             uint8_t obuf[ADB_MAX_OUT_LEN + 2];
 595             int olen;
 596             olen = adb_request(&adb_bus, obuf + 2, data + 1, len - 1);
 597             if (olen > 0) {
 598                 obuf[0] = ADB_PACKET;
 599                 obuf[1] = 0x00;
 600             } else {
 601                 /* error */
 602                 obuf[0] = ADB_PACKET;
 603                 obuf[1] = -olen;
 604                 olen = 0;
 605             }
 606             cuda_send_packet_to_host(s, obuf, olen + 2);
 607         }
 608         break;
 609     case CUDA_PACKET:
 610         cuda_receive_packet(s, data + 1, len - 1);
 611         break;
 612     }
 613 }
 614
 615 static void cuda_writew (void *opaque, target_phys_addr_t addr, uint32_t value)
 616 {
 617 }
 618
 619 static void cuda_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
 620 {
 621 }
 622
 623 static uint32_t cuda_readw (void *opaque, target_phys_addr_t addr)
 624 {
 625     return 0;
 626 }
 627
 628 static uint32_t cuda_readl (void *opaque, target_phys_addr_t addr)
 629 {
 630     return 0;
 631 }
 632
 633 static CPUWriteMemoryFunc *cuda_write[] = {
 634     &cuda_writeb,
 635     &cuda_writew,
 636     &cuda_writel,
 637 };
 638
 639 static CPUReadMemoryFunc *cuda_read[] = {
 640     &cuda_readb,
 641     &cuda_readw,
 642     &cuda_readl,
 643 };
 644
 645 static void cuda_save_timer(QEMUFile *f, CUDATimer *s)
 646 {
 647     qemu_put_be16s(f, &s->latch);
 648     qemu_put_be16s(f, &s->counter_value);
 649     qemu_put_sbe64s(f, &s->load_time);
 650     qemu_put_sbe64s(f, &s->next_irq_time);
 651     if (s->timer)
 652         qemu_put_timer(f, s->timer);
 653 }
 654
 655 static void cuda_save(QEMUFile *f, void *opaque)
 656 {
 657     CUDAState *s = (CUDAState *)opaque;
 658
 659     qemu_put_ubyte(f, s->b);
 660     qemu_put_ubyte(f, s->a);
 661     qemu_put_ubyte(f, s->dirb);
 662     qemu_put_ubyte(f, s->dira);
 663     qemu_put_ubyte(f, s->sr);
 664     qemu_put_ubyte(f, s->acr);
 665     qemu_put_ubyte(f, s->pcr);
 666     qemu_put_ubyte(f, s->ifr);
 667     qemu_put_ubyte(f, s->ier);
 668     qemu_put_ubyte(f, s->anh);
 669     qemu_put_sbe32s(f, &s->data_in_size);
 670     qemu_put_sbe32s(f, &s->data_in_index);
 671     qemu_put_sbe32s(f, &s->data_out_index);
 672     qemu_put_ubyte(f, s->autopoll);
 673     qemu_put_buffer(f, s->data_in, sizeof(s->data_in));
 674     qemu_put_buffer(f, s->data_out, sizeof(s->data_out));
 675     qemu_put_be32s(f, &s->tick_offset);
 676     cuda_save_timer(f, &s->timers[0]);
 677     cuda_save_timer(f, &s->timers[1]);
 678 }
 679
 680 static void cuda_load_timer(QEMUFile *f, CUDATimer *s)
 681 {
 682     qemu_get_be16s(f, &s->latch);
 683     qemu_get_be16s(f, &s->counter_value);
 684     qemu_get_sbe64s(f, &s->load_time);
 685     qemu_get_sbe64s(f, &s->next_irq_time);
 686     if (s->timer)
 687         qemu_get_timer(f, s->timer);
 688 }
 689
 690 static int cuda_load(QEMUFile *f, void *opaque, int version_id)
 691 {
 692     CUDAState *s = (CUDAState *)opaque;
 693
 694     if (version_id != 1)
 695         return -EINVAL;
 696
 697     s->b = qemu_get_ubyte(f);
 698     s->a = qemu_get_ubyte(f);
 699     s->dirb = qemu_get_ubyte(f);
 700     s->dira = qemu_get_ubyte(f);
 701     s->sr = qemu_get_ubyte(f);
 702     s->acr = qemu_get_ubyte(f);
 703     s->pcr = qemu_get_ubyte(f);
 704     s->ifr = qemu_get_ubyte(f);
 705     s->ier = qemu_get_ubyte(f);
 706     s->anh = qemu_get_ubyte(f);
 707     qemu_get_sbe32s(f, &s->data_in_size);
 708     qemu_get_sbe32s(f, &s->data_in_index);
 709     qemu_get_sbe32s(f, &s->data_out_index);
 710     s->autopoll = qemu_get_ubyte(f);
 711     qemu_get_buffer(f, s->data_in, sizeof(s->data_in));
 712     qemu_get_buffer(f, s->data_out, sizeof(s->data_out));
 713     qemu_get_be32s(f, &s->tick_offset);
 714     cuda_load_timer(f, &s->timers[0]);
 715     cuda_load_timer(f, &s->timers[1]);
 716
 717     return 0;
 718 }
 719
 720 static void cuda_reset(void *opaque)
 721 {
 722     CUDAState *s = opaque;
 723
 724     s->b = 0;
 725     s->a = 0;
 726     s->dirb = 0;
 727     s->dira = 0;
 728     s->sr = 0;
 729     s->acr = 0;
 730     s->pcr = 0;
 731     s->ifr = 0;
 732     s->ier = 0;
 733     //    s->ier = T1_INT | SR_INT;
 734     s->anh = 0;
 735     s->data_in_size = 0;
 736     s->data_in_index = 0;
 737     s->data_out_index = 0;
 738     s->autopoll = 0;
 739
 740     s->timers[0].latch = 0xffff;
 741     set_counter(s, &s->timers[0], 0xffff);
 742
 743     s->timers[1].latch = 0;
 744     set_counter(s, &s->timers[1], 0xffff);
 745 }
 746
 747 void cuda_init (int *cuda_mem_index, qemu_irq irq)
 748 {
 749     struct tm tm;
 750     CUDAState *s = &cuda_state;
 751
 752     s->irq = irq;
 753
 754     s->timers[0].index = 0;
 755     s->timers[0].timer = qemu_new_timer(vm_clock, cuda_timer1, s);
 756
 757     s->timers[1].index = 1;
 758
 759     qemu_get_timedate(&tm, 0);
 760     s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
 761
 762     s->adb_poll_timer = qemu_new_timer(vm_clock, cuda_adb_poll, s);
 763     *cuda_mem_index = cpu_register_io_memory(0, cuda_read, cuda_write, s);
 764     register_savevm("cuda", -1, 1, cuda_save, cuda_load, s);
 765     qemu_register_reset(cuda_reset, s);
 766     cuda_reset(s);
 767 }