hw/m48t59.c

   1 /*
   2  * QEMU M48T59 and M48T08 NVRAM emulation for PPC PREP and Sparc platforms
   3  *
   4  * Copyright (c) 2003-2005, 2007 Jocelyn Mayer
   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 #include "hw.h"
  25 #include "nvram.h"
  26 #include "qemu-timer.h"
  27 #include "sysemu.h"
  28 #include "sysbus.h"
  29 #include "isa.h"
  30
  31 //#define DEBUG_NVRAM
  32
  33 #if defined(DEBUG_NVRAM)
  34 #define NVRAM_PRINTF(fmt, ...) do { printf(fmt , ## __VA_ARGS__); } while (0)
  35 #else
  36 #define NVRAM_PRINTF(fmt, ...) do { } while (0)
  37 #endif
  38
  39 /*
  40  * The M48T02, M48T08 and M48T59 chips are very similar. The newer '59 has
  41  * alarm and a watchdog timer and related control registers. In the
  42  * PPC platform there is also a nvram lock function.
  43  */
  44 struct m48t59_t {
  45     /* Model parameters */
  46     uint32_t type; // 2 = m48t02, 8 = m48t08, 59 = m48t59
  47     /* Hardware parameters */
  48     qemu_irq IRQ;
  49     uint32_t io_base;
  50     uint32_t size;
  51     /* RTC management */
  52     time_t   time_offset;
  53     time_t   stop_time;
  54     /* Alarm & watchdog */
  55     struct tm alarm;
  56     struct QEMUTimer *alrm_timer;
  57     struct QEMUTimer *wd_timer;
  58     /* NVRAM storage */
  59     uint8_t  lock;
  60     uint16_t addr;
  61     uint8_t *buffer;
  62 };
  63
  64 typedef struct M48t59ISAState {
  65     ISADevice busdev;
  66     m48t59_t state;
  67 } M48t59ISAState;
  68
  69 typedef struct M48t59SysBusState {
  70     SysBusDevice busdev;
  71     m48t59_t state;
  72 } M48t59SysBusState;
  73
  74 /* Fake timer functions */
  75 /* Generic helpers for BCD */
  76 static inline uint8_t toBCD (uint8_t value)
  77 {
  78     return (((value / 10) % 10) << 4) | (value % 10);
  79 }
  80
  81 static inline uint8_t fromBCD (uint8_t BCD)
  82 {
  83     return ((BCD >> 4) * 10) + (BCD & 0x0F);
  84 }
  85
  86 /* Alarm management */
  87 static void alarm_cb (void *opaque)
  88 {
  89     struct tm tm;
  90     uint64_t next_time;
  91     m48t59_t *NVRAM = opaque;
  92
  93     qemu_set_irq(NVRAM->IRQ, 1);
  94     if ((NVRAM->buffer[0x1FF5] & 0x80) == 0 &&
  95         (NVRAM->buffer[0x1FF4] & 0x80) == 0 &&
  96         (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
  97         (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
  98         /* Repeat once a month */
  99         qemu_get_timedate(&tm, NVRAM->time_offset);
 100         tm.tm_mon++;
 101         if (tm.tm_mon == 13) {
 102             tm.tm_mon = 1;
 103             tm.tm_year++;
 104         }
 105         next_time = qemu_timedate_diff(&tm) - NVRAM->time_offset;
 106     } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
 107                (NVRAM->buffer[0x1FF4] & 0x80) == 0 &&
 108                (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
 109                (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
 110         /* Repeat once a day */
 111         next_time = 24 * 60 * 60;
 112     } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
 113                (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&
 114                (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
 115                (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
 116         /* Repeat once an hour */
 117         next_time = 60 * 60;
 118     } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
 119                (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&
 120                (NVRAM->buffer[0x1FF3] & 0x80) != 0 &&
 121                (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
 122         /* Repeat once a minute */
 123         next_time = 60;
 124     } else {
 125         /* Repeat once a second */
 126         next_time = 1;
 127     }
 128     qemu_mod_timer(NVRAM->alrm_timer, qemu_get_clock(vm_clock) +
 129                     next_time * 1000);
 130     qemu_set_irq(NVRAM->IRQ, 0);
 131 }
 132
 133 static void set_alarm (m48t59_t *NVRAM)
 134 {
 135     int diff;
 136     if (NVRAM->alrm_timer != NULL) {
 137         qemu_del_timer(NVRAM->alrm_timer);
 138         diff = qemu_timedate_diff(&NVRAM->alarm) - NVRAM->time_offset;
 139         if (diff > 0)
 140             qemu_mod_timer(NVRAM->alrm_timer, diff * 1000);
 141     }
 142 }
 143
 144 /* RTC management helpers */
 145 static inline void get_time (m48t59_t *NVRAM, struct tm *tm)
 146 {
 147     qemu_get_timedate(tm, NVRAM->time_offset);
 148 }
 149
 150 static void set_time (m48t59_t *NVRAM, struct tm *tm)
 151 {
 152     NVRAM->time_offset = qemu_timedate_diff(tm);
 153     set_alarm(NVRAM);
 154 }
 155
 156 /* Watchdog management */
 157 static void watchdog_cb (void *opaque)
 158 {
 159     m48t59_t *NVRAM = opaque;
 160
 161     NVRAM->buffer[0x1FF0] |= 0x80;
 162     if (NVRAM->buffer[0x1FF7] & 0x80) {
 163         NVRAM->buffer[0x1FF7] = 0x00;
 164         NVRAM->buffer[0x1FFC] &= ~0x40;
 165         /* May it be a hw CPU Reset instead ? */
 166         qemu_system_reset_request();
 167     } else {
 168         qemu_set_irq(NVRAM->IRQ, 1);
 169         qemu_set_irq(NVRAM->IRQ, 0);
 170     }
 171 }
 172
 173 static void set_up_watchdog (m48t59_t *NVRAM, uint8_t value)
 174 {
 175     uint64_t interval; /* in 1/16 seconds */
 176
 177     NVRAM->buffer[0x1FF0] &= ~0x80;
 178     if (NVRAM->wd_timer != NULL) {
 179         qemu_del_timer(NVRAM->wd_timer);
 180         if (value != 0) {
 181             interval = (1 << (2 * (value & 0x03))) * ((value >> 2) & 0x1F);
 182             qemu_mod_timer(NVRAM->wd_timer, ((uint64_t)time(NULL) * 1000) +
 183                            ((interval * 1000) >> 4));
 184         }
 185     }
 186 }
 187
 188 /* Direct access to NVRAM */
 189 void m48t59_write (void *opaque, uint32_t addr, uint32_t val)
 190 {
 191     m48t59_t *NVRAM = opaque;
 192     struct tm tm;
 193     int tmp;
 194
 195     if (addr > 0x1FF8 && addr < 0x2000)
 196         NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);
 197
 198     /* check for NVRAM access */
 199     if ((NVRAM->type == 2 && addr < 0x7f8) ||
 200         (NVRAM->type == 8 && addr < 0x1ff8) ||
 201         (NVRAM->type == 59 && addr < 0x1ff0))
 202         goto do_write;
 203
 204     /* TOD access */
 205     switch (addr) {
 206     case 0x1FF0:
 207         /* flags register : read-only */
 208         break;
 209     case 0x1FF1:
 210         /* unused */
 211         break;
 212     case 0x1FF2:
 213         /* alarm seconds */
 214         tmp = fromBCD(val & 0x7F);
 215         if (tmp >= 0 && tmp <= 59) {
 216             NVRAM->alarm.tm_sec = tmp;
 217             NVRAM->buffer[0x1FF2] = val;
 218             set_alarm(NVRAM);
 219         }
 220         break;
 221     case 0x1FF3:
 222         /* alarm minutes */
 223         tmp = fromBCD(val & 0x7F);
 224         if (tmp >= 0 && tmp <= 59) {
 225             NVRAM->alarm.tm_min = tmp;
 226             NVRAM->buffer[0x1FF3] = val;
 227             set_alarm(NVRAM);
 228         }
 229         break;
 230     case 0x1FF4:
 231         /* alarm hours */
 232         tmp = fromBCD(val & 0x3F);
 233         if (tmp >= 0 && tmp <= 23) {
 234             NVRAM->alarm.tm_hour = tmp;
 235             NVRAM->buffer[0x1FF4] = val;
 236             set_alarm(NVRAM);
 237         }
 238         break;
 239     case 0x1FF5:
 240         /* alarm date */
 241         tmp = fromBCD(val & 0x1F);
 242         if (tmp != 0) {
 243             NVRAM->alarm.tm_mday = tmp;
 244             NVRAM->buffer[0x1FF5] = val;
 245             set_alarm(NVRAM);
 246         }
 247         break;
 248     case 0x1FF6:
 249         /* interrupts */
 250         NVRAM->buffer[0x1FF6] = val;
 251         break;
 252     case 0x1FF7:
 253         /* watchdog */
 254         NVRAM->buffer[0x1FF7] = val;
 255         set_up_watchdog(NVRAM, val);
 256         break;
 257     case 0x1FF8:
 258     case 0x07F8:
 259         /* control */
 260        NVRAM->buffer[addr] = (val & ~0xA0) | 0x90;
 261         break;
 262     case 0x1FF9:
 263     case 0x07F9:
 264         /* seconds (BCD) */
 265         tmp = fromBCD(val & 0x7F);
 266         if (tmp >= 0 && tmp <= 59) {
 267             get_time(NVRAM, &tm);
 268             tm.tm_sec = tmp;
 269             set_time(NVRAM, &tm);
 270         }
 271         if ((val & 0x80) ^ (NVRAM->buffer[addr] & 0x80)) {
 272             if (val & 0x80) {
 273                 NVRAM->stop_time = time(NULL);
 274             } else {
 275                 NVRAM->time_offset += NVRAM->stop_time - time(NULL);
 276                 NVRAM->stop_time = 0;
 277             }
 278         }
 279         NVRAM->buffer[addr] = val & 0x80;
 280         break;
 281     case 0x1FFA:
 282     case 0x07FA:
 283         /* minutes (BCD) */
 284         tmp = fromBCD(val & 0x7F);
 285         if (tmp >= 0 && tmp <= 59) {
 286             get_time(NVRAM, &tm);
 287             tm.tm_min = tmp;
 288             set_time(NVRAM, &tm);
 289         }
 290         break;
 291     case 0x1FFB:
 292     case 0x07FB:
 293         /* hours (BCD) */
 294         tmp = fromBCD(val & 0x3F);
 295         if (tmp >= 0 && tmp <= 23) {
 296             get_time(NVRAM, &tm);
 297             tm.tm_hour = tmp;
 298             set_time(NVRAM, &tm);
 299         }
 300         break;
 301     case 0x1FFC:
 302     case 0x07FC:
 303         /* day of the week / century */
 304         tmp = fromBCD(val & 0x07);
 305         get_time(NVRAM, &tm);
 306         tm.tm_wday = tmp;
 307         set_time(NVRAM, &tm);
 308         NVRAM->buffer[addr] = val & 0x40;
 309         break;
 310     case 0x1FFD:
 311     case 0x07FD:
 312         /* date */
 313         tmp = fromBCD(val & 0x1F);
 314         if (tmp != 0) {
 315             get_time(NVRAM, &tm);
 316             tm.tm_mday = tmp;
 317             set_time(NVRAM, &tm);
 318         }
 319         break;
 320     case 0x1FFE:
 321     case 0x07FE:
 322         /* month */
 323         tmp = fromBCD(val & 0x1F);
 324         if (tmp >= 1 && tmp <= 12) {
 325             get_time(NVRAM, &tm);
 326             tm.tm_mon = tmp - 1;
 327             set_time(NVRAM, &tm);
 328         }
 329         break;
 330     case 0x1FFF:
 331     case 0x07FF:
 332         /* year */
 333         tmp = fromBCD(val);
 334         if (tmp >= 0 && tmp <= 99) {
 335             get_time(NVRAM, &tm);
 336             if (NVRAM->type == 8)
 337                 tm.tm_year = fromBCD(val) + 68; // Base year is 1968
 338             else
 339                 tm.tm_year = fromBCD(val);
 340             set_time(NVRAM, &tm);
 341         }
 342         break;
 343     default:
 344         /* Check lock registers state */
 345         if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))
 346             break;
 347         if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))
 348             break;
 349     do_write:
 350         if (addr < NVRAM->size) {
 351             NVRAM->buffer[addr] = val & 0xFF;
 352         }
 353         break;
 354     }
 355 }
 356
 357 uint32_t m48t59_read (void *opaque, uint32_t addr)
 358 {
 359     m48t59_t *NVRAM = opaque;
 360     struct tm tm;
 361     uint32_t retval = 0xFF;
 362
 363     /* check for NVRAM access */
 364     if ((NVRAM->type == 2 && addr < 0x078f) ||
 365         (NVRAM->type == 8 && addr < 0x1ff8) ||
 366         (NVRAM->type == 59 && addr < 0x1ff0))
 367         goto do_read;
 368
 369     /* TOD access */
 370     switch (addr) {
 371     case 0x1FF0:
 372         /* flags register */
 373         goto do_read;
 374     case 0x1FF1:
 375         /* unused */
 376         retval = 0;
 377         break;
 378     case 0x1FF2:
 379         /* alarm seconds */
 380         goto do_read;
 381     case 0x1FF3:
 382         /* alarm minutes */
 383         goto do_read;
 384     case 0x1FF4:
 385         /* alarm hours */
 386         goto do_read;
 387     case 0x1FF5:
 388         /* alarm date */
 389         goto do_read;
 390     case 0x1FF6:
 391         /* interrupts */
 392         goto do_read;
 393     case 0x1FF7:
 394         /* A read resets the watchdog */
 395         set_up_watchdog(NVRAM, NVRAM->buffer[0x1FF7]);
 396         goto do_read;
 397     case 0x1FF8:
 398     case 0x07F8:
 399         /* control */
 400         goto do_read;
 401     case 0x1FF9:
 402     case 0x07F9:
 403         /* seconds (BCD) */
 404         get_time(NVRAM, &tm);
 405         retval = (NVRAM->buffer[addr] & 0x80) | toBCD(tm.tm_sec);
 406         break;
 407     case 0x1FFA:
 408     case 0x07FA:
 409         /* minutes (BCD) */
 410         get_time(NVRAM, &tm);
 411         retval = toBCD(tm.tm_min);
 412         break;
 413     case 0x1FFB:
 414     case 0x07FB:
 415         /* hours (BCD) */
 416         get_time(NVRAM, &tm);
 417         retval = toBCD(tm.tm_hour);
 418         break;
 419     case 0x1FFC:
 420     case 0x07FC:
 421         /* day of the week / century */
 422         get_time(NVRAM, &tm);
 423         retval = NVRAM->buffer[addr] | tm.tm_wday;
 424         break;
 425     case 0x1FFD:
 426     case 0x07FD:
 427         /* date */
 428         get_time(NVRAM, &tm);
 429         retval = toBCD(tm.tm_mday);
 430         break;
 431     case 0x1FFE:
 432     case 0x07FE:
 433         /* month */
 434         get_time(NVRAM, &tm);
 435         retval = toBCD(tm.tm_mon + 1);
 436         break;
 437     case 0x1FFF:
 438     case 0x07FF:
 439         /* year */
 440         get_time(NVRAM, &tm);
 441         if (NVRAM->type == 8)
 442             retval = toBCD(tm.tm_year - 68); // Base year is 1968
 443         else
 444             retval = toBCD(tm.tm_year);
 445         break;
 446     default:
 447         /* Check lock registers state */
 448         if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))
 449             break;
 450         if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))
 451             break;
 452     do_read:
 453         if (addr < NVRAM->size) {
 454             retval = NVRAM->buffer[addr];
 455         }
 456         break;
 457     }
 458     if (addr > 0x1FF9 && addr < 0x2000)
 459        NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);
 460
 461     return retval;
 462 }
 463
 464 void m48t59_set_addr (void *opaque, uint32_t addr)
 465 {
 466     m48t59_t *NVRAM = opaque;
 467
 468     NVRAM->addr = addr;
 469 }
 470
 471 void m48t59_toggle_lock (void *opaque, int lock)
 472 {
 473     m48t59_t *NVRAM = opaque;
 474
 475     NVRAM->lock ^= 1 << lock;
 476 }
 477
 478 /* IO access to NVRAM */
 479 static void NVRAM_writeb (void *opaque, uint32_t addr, uint32_t val)
 480 {
 481     m48t59_t *NVRAM = opaque;
 482
 483     addr -= NVRAM->io_base;
 484     NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);
 485     switch (addr) {
 486     case 0:
 487         NVRAM->addr &= ~0x00FF;
 488         NVRAM->addr |= val;
 489         break;
 490     case 1:
 491         NVRAM->addr &= ~0xFF00;
 492         NVRAM->addr |= val << 8;
 493         break;
 494     case 3:
 495         m48t59_write(NVRAM, val, NVRAM->addr);
 496         NVRAM->addr = 0x0000;
 497         break;
 498     default:
 499         break;
 500     }
 501 }
 502
 503 static uint32_t NVRAM_readb (void *opaque, uint32_t addr)
 504 {
 505     m48t59_t *NVRAM = opaque;
 506     uint32_t retval;
 507
 508     addr -= NVRAM->io_base;
 509     switch (addr) {
 510     case 3:
 511         retval = m48t59_read(NVRAM, NVRAM->addr);
 512         break;
 513     default:
 514         retval = -1;
 515         break;
 516     }
 517     NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);
 518
 519     return retval;
 520 }
 521
 522 static void nvram_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)
 523 {
 524     m48t59_t *NVRAM = opaque;
 525
 526     m48t59_write(NVRAM, addr, value & 0xff);
 527 }
 528
 529 static void nvram_writew (void *opaque, target_phys_addr_t addr, uint32_t value)
 530 {
 531     m48t59_t *NVRAM = opaque;
 532
 533     m48t59_write(NVRAM, addr, (value >> 8) & 0xff);
 534     m48t59_write(NVRAM, addr + 1, value & 0xff);
 535 }
 536
 537 static void nvram_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
 538 {
 539     m48t59_t *NVRAM = opaque;
 540
 541     m48t59_write(NVRAM, addr, (value >> 24) & 0xff);
 542     m48t59_write(NVRAM, addr + 1, (value >> 16) & 0xff);
 543     m48t59_write(NVRAM, addr + 2, (value >> 8) & 0xff);
 544     m48t59_write(NVRAM, addr + 3, value & 0xff);
 545 }
 546
 547 static uint32_t nvram_readb (void *opaque, target_phys_addr_t addr)
 548 {
 549     m48t59_t *NVRAM = opaque;
 550     uint32_t retval;
 551
 552     retval = m48t59_read(NVRAM, addr);
 553     return retval;
 554 }
 555
 556 static uint32_t nvram_readw (void *opaque, target_phys_addr_t addr)
 557 {
 558     m48t59_t *NVRAM = opaque;
 559     uint32_t retval;
 560
 561     retval = m48t59_read(NVRAM, addr) << 8;
 562     retval |= m48t59_read(NVRAM, addr + 1);
 563     return retval;
 564 }
 565
 566 static uint32_t nvram_readl (void *opaque, target_phys_addr_t addr)
 567 {
 568     m48t59_t *NVRAM = opaque;
 569     uint32_t retval;
 570
 571     retval = m48t59_read(NVRAM, addr) << 24;
 572     retval |= m48t59_read(NVRAM, addr + 1) << 16;
 573     retval |= m48t59_read(NVRAM, addr + 2) << 8;
 574     retval |= m48t59_read(NVRAM, addr + 3);
 575     return retval;
 576 }
 577
 578 static CPUWriteMemoryFunc * const nvram_write[] = {
 579     &nvram_writeb,
 580     &nvram_writew,
 581     &nvram_writel,
 582 };
 583
 584 static CPUReadMemoryFunc * const nvram_read[] = {
 585     &nvram_readb,
 586     &nvram_readw,
 587     &nvram_readl,
 588 };
 589
 590 static void m48t59_save(QEMUFile *f, void *opaque)
 591 {
 592     m48t59_t *s = opaque;
 593
 594     qemu_put_8s(f, &s->lock);
 595     qemu_put_be16s(f, &s->addr);
 596     qemu_put_buffer(f, s->buffer, s->size);
 597 }
 598
 599 static int m48t59_load(QEMUFile *f, void *opaque, int version_id)
 600 {
 601     m48t59_t *s = opaque;
 602
 603     if (version_id != 1)
 604         return -EINVAL;
 605
 606     qemu_get_8s(f, &s->lock);
 607     qemu_get_be16s(f, &s->addr);
 608     qemu_get_buffer(f, s->buffer, s->size);
 609
 610     return 0;
 611 }
 612
 613 static void m48t59_reset(void *opaque)
 614 {
 615     m48t59_t *NVRAM = opaque;
 616
 617     NVRAM->addr = 0;
 618     NVRAM->lock = 0;
 619     if (NVRAM->alrm_timer != NULL)
 620         qemu_del_timer(NVRAM->alrm_timer);
 621
 622     if (NVRAM->wd_timer != NULL)
 623         qemu_del_timer(NVRAM->wd_timer);
 624 }
 625
 626 /* Initialisation routine */
 627 m48t59_t *m48t59_init (qemu_irq IRQ, target_phys_addr_t mem_base,
 628                        uint32_t io_base, uint16_t size,
 629                        int type)
 630 {
 631     DeviceState *dev;
 632     SysBusDevice *s;
 633     M48t59SysBusState *d;
 634
 635     dev = qdev_create(NULL, "m48t59");
 636     qdev_prop_set_uint32(dev, "type", type);
 637     qdev_prop_set_uint32(dev, "size", size);
 638     qdev_prop_set_uint32(dev, "io_base", io_base);
 639     qdev_init(dev);
 640     s = sysbus_from_qdev(dev);
 641     sysbus_connect_irq(s, 0, IRQ);
 642     if (io_base != 0) {
 643         register_ioport_read(io_base, 0x04, 1, NVRAM_readb, s);
 644         register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, s);
 645     }
 646     if (mem_base != 0) {
 647         sysbus_mmio_map(s, 0, mem_base);
 648     }
 649
 650     d = FROM_SYSBUS(M48t59SysBusState, s);
 651
 652     return &d->state;
 653 }
 654
 655 m48t59_t *m48t59_init_isa(uint32_t io_base, uint16_t size, int type)
 656 {
 657     M48t59ISAState *d;
 658     ISADevice *dev;
 659     m48t59_t *s;
 660
 661     dev = isa_create("m48t59_isa");
 662     qdev_prop_set_uint32(&dev->qdev, "type", type);
 663     qdev_prop_set_uint32(&dev->qdev, "size", size);
 664     qdev_prop_set_uint32(&dev->qdev, "io_base", io_base);
 665     qdev_init(&dev->qdev);
 666     d = DO_UPCAST(M48t59ISAState, busdev, dev);
 667     s = &d->state;
 668
 669     if (io_base != 0) {
 670         register_ioport_read(io_base, 0x04, 1, NVRAM_readb, s);
 671         register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, s);
 672     }
 673
 674     return s;
 675 }
 676
 677 static void m48t59_init_common(m48t59_t *s)
 678 {
 679     s->buffer = qemu_mallocz(s->size);
 680     if (s->type == 59) {
 681         s->alrm_timer = qemu_new_timer(vm_clock, &alarm_cb, s);
 682         s->wd_timer = qemu_new_timer(vm_clock, &watchdog_cb, s);
 683     }
 684     qemu_get_timedate(&s->alarm, 0);
 685
 686     qemu_register_reset(m48t59_reset, s);
 687     register_savevm("m48t59", -1, 1, m48t59_save, m48t59_load, s);
 688 }
 689
 690 static int m48t59_init_isa1(ISADevice *dev)
 691 {
 692     M48t59ISAState *d = DO_UPCAST(M48t59ISAState, busdev, dev);
 693     m48t59_t *s = &d->state;
 694
 695     isa_init_irq(dev, &s->IRQ, 8);
 696     m48t59_init_common(s);
 697
 698     return 0;
 699 }
 700
 701 static int m48t59_init1(SysBusDevice *dev)
 702 {
 703     M48t59SysBusState *d = FROM_SYSBUS(M48t59SysBusState, dev);
 704     m48t59_t *s = &d->state;
 705     int mem_index;
 706
 707     sysbus_init_irq(dev, &s->IRQ);
 708
 709     mem_index = cpu_register_io_memory(nvram_read, nvram_write, s);
 710     sysbus_init_mmio(dev, s->size, mem_index);
 711     m48t59_init_common(s);
 712
 713     return 0;
 714 }
 715
 716 static ISADeviceInfo m48t59_isa_info = {
 717     .init = m48t59_init_isa1,
 718     .qdev.name = "m48t59_isa",
 719     .qdev.size = sizeof(M48t59ISAState),
 720     .qdev.no_user = 1,
 721     .qdev.props = (Property[]) {
 722         DEFINE_PROP_UINT32("size",    M48t59ISAState, state.size,    -1),
 723         DEFINE_PROP_UINT32("type",    M48t59ISAState, state.type,    -1),
 724         DEFINE_PROP_HEX32( "io_base", M48t59ISAState, state.io_base,  0),
 725         DEFINE_PROP_END_OF_LIST(),
 726     }
 727 };
 728
 729 static SysBusDeviceInfo m48t59_info = {
 730     .init = m48t59_init1,
 731     .qdev.name  = "m48t59",
 732     .qdev.size = sizeof(M48t59SysBusState),
 733     .qdev.props = (Property[]) {
 734         DEFINE_PROP_UINT32("size",    M48t59SysBusState, state.size,    -1),
 735         DEFINE_PROP_UINT32("type",    M48t59SysBusState, state.type,    -1),
 736         DEFINE_PROP_HEX32( "io_base", M48t59SysBusState, state.io_base,  0),
 737         DEFINE_PROP_END_OF_LIST(),
 738     }
 739 };
 740
 741 static void m48t59_register_devices(void)
 742 {
 743     sysbus_register_withprop(&m48t59_info);
 744     isa_qdev_register(&m48t59_isa_info);
 745 }
 746
 747 device_init(m48t59_register_devices)