hw/slavio_serial.c

   1 /*
   2  * QEMU Sparc SLAVIO serial port emulation
   3  *
   4  * Copyright (c) 2003-2005 Fabrice Bellard
   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 "vl.h"
  25 /* debug serial */
  26 //#define DEBUG_SERIAL
  27
  28 /* debug keyboard */
  29 //#define DEBUG_KBD
  30
  31 /* debug mouse */
  32 //#define DEBUG_MOUSE
  33
  34 /*
  35  * This is the serial port, mouse and keyboard part of chip STP2001
  36  * (Slave I/O), also produced as NCR89C105. See
  37  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
  38  *
  39  * The serial ports implement full AMD AM8530 or Zilog Z8530 chips,
  40  * mouse and keyboard ports don't implement all functions and they are
  41  * only asynchronous. There is no DMA.
  42  *
  43  */
  44
  45 /*
  46  * Modifications:
  47  *  2006-Aug-10  Igor Kovalenko :   Renamed KBDQueue to SERIOQueue, implemented
  48  *                                  serial mouse queue.
  49  *                                  Implemented serial mouse protocol.
  50  */
  51
  52 #ifdef DEBUG_SERIAL
  53 #define SER_DPRINTF(fmt, args...) \
  54 do { printf("SER: " fmt , ##args); } while (0)
  55 #define pic_set_irq(irq, level) \
  56 do { printf("SER: set_irq(%d): %d\n", (irq), (level)); pic_set_irq((irq),(level));} while (0)
  57 #else
  58 #define SER_DPRINTF(fmt, args...)
  59 #endif
  60 #ifdef DEBUG_KBD
  61 #define KBD_DPRINTF(fmt, args...) \
  62 do { printf("KBD: " fmt , ##args); } while (0)
  63 #else
  64 #define KBD_DPRINTF(fmt, args...)
  65 #endif
  66 #ifdef DEBUG_MOUSE
  67 #define MS_DPRINTF(fmt, args...) \
  68 do { printf("MSC: " fmt , ##args); } while (0)
  69 #else
  70 #define MS_DPRINTF(fmt, args...)
  71 #endif
  72
  73 typedef enum {
  74     chn_a, chn_b,
  75 } chn_id_t;
  76
  77 #define CHN_C(s) ((s)->chn == chn_b? 'b' : 'a')
  78
  79 typedef enum {
  80     ser, kbd, mouse,
  81 } chn_type_t;
  82
  83 #define SERIO_QUEUE_SIZE 256
  84
  85 typedef struct {
  86     uint8_t data[SERIO_QUEUE_SIZE];
  87     int rptr, wptr, count;
  88 } SERIOQueue;
  89
  90 typedef struct ChannelState {
  91     int irq;
  92     int reg;
  93     int rxint, txint, rxint_under_svc, txint_under_svc;
  94     chn_id_t chn; // this channel, A (base+4) or B (base+0)
  95     chn_type_t type;
  96     struct ChannelState *otherchn;
  97     uint8_t rx, tx, wregs[16], rregs[16];
  98     SERIOQueue queue;
  99     CharDriverState *chr;
 100 } ChannelState;
 101
 102 struct SerialState {
 103     struct ChannelState chn[2];
 104 };
 105
 106 #define SERIAL_MAXADDR 7
 107
 108 static void handle_kbd_command(ChannelState *s, int val);
 109 static int serial_can_receive(void *opaque);
 110 static void serial_receive_byte(ChannelState *s, int ch);
 111 static inline void set_txint(ChannelState *s);
 112
 113 static void put_queue(void *opaque, int b)
 114 {
 115     ChannelState *s = opaque;
 116     SERIOQueue *q = &s->queue;
 117
 118     SER_DPRINTF("channel %c put: 0x%02x\n", CHN_C(s), b);
 119     if (q->count >= SERIO_QUEUE_SIZE)
 120         return;
 121     q->data[q->wptr] = b;
 122     if (++q->wptr == SERIO_QUEUE_SIZE)
 123         q->wptr = 0;
 124     q->count++;
 125     serial_receive_byte(s, 0);
 126 }
 127
 128 static uint32_t get_queue(void *opaque)
 129 {
 130     ChannelState *s = opaque;
 131     SERIOQueue *q = &s->queue;
 132     int val;
 133
 134     if (q->count == 0) {
 135         return 0;
 136     } else {
 137         val = q->data[q->rptr];
 138         if (++q->rptr == SERIO_QUEUE_SIZE)
 139             q->rptr = 0;
 140         q->count--;
 141     }
 142     KBD_DPRINTF("channel %c get 0x%02x\n", CHN_C(s), val);
 143     if (q->count > 0)
 144         serial_receive_byte(s, 0);
 145     return val;
 146 }
 147
 148 static int slavio_serial_update_irq_chn(ChannelState *s)
 149 {
 150     if ((s->wregs[1] & 1) && // interrupts enabled
 151         (((s->wregs[1] & 2) && s->txint == 1) || // tx ints enabled, pending
 152          ((((s->wregs[1] & 0x18) == 8) || ((s->wregs[1] & 0x18) == 0x10)) &&
 153           s->rxint == 1) || // rx ints enabled, pending
 154          ((s->wregs[15] & 0x80) && (s->rregs[0] & 0x80)))) { // break int e&p
 155         return 1;
 156     }
 157     return 0;
 158 }
 159
 160 static void slavio_serial_update_irq(ChannelState *s)
 161 {
 162     int irq;
 163
 164     irq = slavio_serial_update_irq_chn(s);
 165     irq |= slavio_serial_update_irq_chn(s->otherchn);
 166
 167     pic_set_irq(s->irq, irq);
 168 }
 169
 170 static void slavio_serial_reset_chn(ChannelState *s)
 171 {
 172     int i;
 173
 174     s->reg = 0;
 175     for (i = 0; i < SERIAL_MAXADDR; i++) {
 176         s->rregs[i] = 0;
 177         s->wregs[i] = 0;
 178     }
 179     s->wregs[4] = 4;
 180     s->wregs[9] = 0xc0;
 181     s->wregs[11] = 8;
 182     s->wregs[14] = 0x30;
 183     s->wregs[15] = 0xf8;
 184     s->rregs[0] = 0x44;
 185     s->rregs[1] = 6;
 186
 187     s->rx = s->tx = 0;
 188     s->rxint = s->txint = 0;
 189     s->rxint_under_svc = s->txint_under_svc = 0;
 190 }
 191
 192 static void slavio_serial_reset(void *opaque)
 193 {
 194     SerialState *s = opaque;
 195     slavio_serial_reset_chn(&s->chn[0]);
 196     slavio_serial_reset_chn(&s->chn[1]);
 197 }
 198
 199 static inline void clr_rxint(ChannelState *s)
 200 {
 201     s->rxint = 0;
 202     s->rxint_under_svc = 0;
 203     if (s->chn == chn_a)
 204         s->rregs[3] &= ~0x20;
 205     else
 206         s->otherchn->rregs[3] &= ~4;
 207     if (s->txint)
 208         set_txint(s);
 209     else
 210         s->rregs[2] = 6;
 211     slavio_serial_update_irq(s);
 212 }
 213
 214 static inline void set_rxint(ChannelState *s)
 215 {
 216     s->rxint = 1;
 217     if (!s->txint_under_svc) {
 218         s->rxint_under_svc = 1;
 219         if (s->chn == chn_a)
 220             s->rregs[3] |= 0x20;
 221         else
 222             s->otherchn->rregs[3] |= 4;
 223         s->rregs[2] = 4;
 224         slavio_serial_update_irq(s);
 225     }
 226 }
 227
 228 static inline void clr_txint(ChannelState *s)
 229 {
 230     s->txint = 0;
 231     s->txint_under_svc = 0;
 232     if (s->chn == chn_a)
 233         s->rregs[3] &= ~0x10;
 234     else
 235         s->otherchn->rregs[3] &= ~2;
 236     if (s->rxint)
 237         set_rxint(s);
 238     else
 239         s->rregs[2] = 6;
 240     slavio_serial_update_irq(s);
 241 }
 242
 243 static inline void set_txint(ChannelState *s)
 244 {
 245     s->txint = 1;
 246     if (!s->rxint_under_svc) {
 247         s->txint_under_svc = 1;
 248         if (s->chn == chn_a)
 249             s->rregs[3] |= 0x10;
 250         else
 251             s->otherchn->rregs[3] |= 2;
 252         s->rregs[2] = 0;
 253         slavio_serial_update_irq(s);
 254     }
 255 }
 256
 257 static void slavio_serial_update_parameters(ChannelState *s)
 258 {
 259     int speed, parity, data_bits, stop_bits;
 260     QEMUSerialSetParams ssp;
 261
 262     if (!s->chr || s->type != ser)
 263         return;
 264
 265     if (s->wregs[4] & 1) {
 266         if (s->wregs[4] & 2)
 267             parity = 'E';
 268         else
 269             parity = 'O';
 270     } else {
 271         parity = 'N';
 272     }
 273     if ((s->wregs[4] & 0x0c) == 0x0c)
 274         stop_bits = 2;
 275     else
 276         stop_bits = 1;
 277     switch (s->wregs[5] & 0x60) {
 278     case 0x00:
 279         data_bits = 5;
 280         break;
 281     case 0x20:
 282         data_bits = 7;
 283         break;
 284     case 0x40:
 285         data_bits = 6;
 286         break;
 287     default:
 288     case 0x60:
 289         data_bits = 8;
 290         break;
 291     }
 292     speed = 2457600 / ((s->wregs[12] | (s->wregs[13] << 8)) + 2);
 293     switch (s->wregs[4] & 0xc0) {
 294     case 0x00:
 295         break;
 296     case 0x40:
 297         speed /= 16;
 298         break;
 299     case 0x80:
 300         speed /= 32;
 301         break;
 302     default:
 303     case 0xc0:
 304         speed /= 64;
 305         break;
 306     }
 307     ssp.speed = speed;
 308     ssp.parity = parity;
 309     ssp.data_bits = data_bits;
 310     ssp.stop_bits = stop_bits;
 311     SER_DPRINTF("channel %c: speed=%d parity=%c data=%d stop=%d\n", CHN_C(s),
 312                 speed, parity, data_bits, stop_bits);
 313     qemu_chr_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
 314 }
 315
 316 static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
 317 {
 318     SerialState *ser = opaque;
 319     ChannelState *s;
 320     uint32_t saddr;
 321     int newreg, channel;
 322
 323     val &= 0xff;
 324     saddr = (addr & 3) >> 1;
 325     channel = (addr & SERIAL_MAXADDR) >> 2;
 326     s = &ser->chn[channel];
 327     switch (saddr) {
 328     case 0:
 329         SER_DPRINTF("Write channel %c, reg[%d] = %2.2x\n", CHN_C(s), s->reg, val & 0xff);
 330         newreg = 0;
 331         switch (s->reg) {
 332         case 0:
 333             newreg = val & 7;
 334             val &= 0x38;
 335             switch (val) {
 336             case 8:
 337                 newreg |= 0x8;
 338                 break;
 339             case 0x28:
 340                 clr_txint(s);
 341                 break;
 342             case 0x38:
 343                 if (s->rxint_under_svc)
 344                     clr_rxint(s);
 345                 else if (s->txint_under_svc)
 346                     clr_txint(s);
 347                 break;
 348             default:
 349                 break;
 350             }
 351             break;
 352         case 1 ... 3:
 353         case 6 ... 8:
 354         case 10 ... 11:
 355         case 14 ... 15:
 356             s->wregs[s->reg] = val;
 357             break;
 358         case 4:
 359         case 5:
 360         case 12:
 361         case 13:
 362             s->wregs[s->reg] = val;
 363             slavio_serial_update_parameters(s);
 364             break;
 365         case 9:
 366             switch (val & 0xc0) {
 367             case 0:
 368             default:
 369                 break;
 370             case 0x40:
 371                 slavio_serial_reset_chn(&ser->chn[1]);
 372                 return;
 373             case 0x80:
 374                 slavio_serial_reset_chn(&ser->chn[0]);
 375                 return;
 376             case 0xc0:
 377                 slavio_serial_reset(ser);
 378                 return;
 379             }
 380             break;
 381         default:
 382             break;
 383         }
 384         if (s->reg == 0)
 385             s->reg = newreg;
 386         else
 387             s->reg = 0;
 388         break;
 389     case 1:
 390         SER_DPRINTF("Write channel %c, ch %d\n", CHN_C(s), val);
 391         if (s->wregs[5] & 8) { // tx enabled
 392             s->tx = val;
 393             if (s->chr)
 394                 qemu_chr_write(s->chr, &s->tx, 1);
 395             else if (s->type == kbd) {
 396                 handle_kbd_command(s, val);
 397             }
 398             s->rregs[0] |= 4; // Tx buffer empty
 399             s->rregs[1] |= 1; // All sent
 400             set_txint(s);
 401         }
 402         break;
 403     default:
 404         break;
 405     }
 406 }
 407
 408 static uint32_t slavio_serial_mem_readb(void *opaque, target_phys_addr_t addr)
 409 {
 410     SerialState *ser = opaque;
 411     ChannelState *s;
 412     uint32_t saddr;
 413     uint32_t ret;
 414     int channel;
 415
 416     saddr = (addr & 3) >> 1;
 417     channel = (addr & SERIAL_MAXADDR) >> 2;
 418     s = &ser->chn[channel];
 419     switch (saddr) {
 420     case 0:
 421         SER_DPRINTF("Read channel %c, reg[%d] = %2.2x\n", CHN_C(s), s->reg, s->rregs[s->reg]);
 422         ret = s->rregs[s->reg];
 423         s->reg = 0;
 424         return ret;
 425     case 1:
 426         s->rregs[0] &= ~1;
 427         clr_rxint(s);
 428         if (s->type == kbd || s->type == mouse)
 429             ret = get_queue(s);
 430         else
 431             ret = s->rx;
 432         SER_DPRINTF("Read channel %c, ch %d\n", CHN_C(s), ret);
 433         return ret;
 434     default:
 435         break;
 436     }
 437     return 0;
 438 }
 439
 440 static int serial_can_receive(void *opaque)
 441 {
 442     ChannelState *s = opaque;
 443     int ret;
 444
 445     if (((s->wregs[3] & 1) == 0) // Rx not enabled
 446         || ((s->rregs[0] & 1) == 1)) // char already available
 447         ret = 0;
 448     else
 449         ret = 1;
 450     //SER_DPRINTF("channel %c can receive %d\n", CHN_C(s), ret);
 451     return ret;
 452 }
 453
 454 static void serial_receive_byte(ChannelState *s, int ch)
 455 {
 456     SER_DPRINTF("channel %c put ch %d\n", CHN_C(s), ch);
 457     s->rregs[0] |= 1;
 458     s->rx = ch;
 459     set_rxint(s);
 460 }
 461
 462 static void serial_receive_break(ChannelState *s)
 463 {
 464     s->rregs[0] |= 0x80;
 465     slavio_serial_update_irq(s);
 466 }
 467
 468 static void serial_receive1(void *opaque, const uint8_t *buf, int size)
 469 {
 470     ChannelState *s = opaque;
 471     serial_receive_byte(s, buf[0]);
 472 }
 473
 474 static void serial_event(void *opaque, int event)
 475 {
 476     ChannelState *s = opaque;
 477     if (event == CHR_EVENT_BREAK)
 478         serial_receive_break(s);
 479 }
 480
 481 static CPUReadMemoryFunc *slavio_serial_mem_read[3] = {
 482     slavio_serial_mem_readb,
 483     slavio_serial_mem_readb,
 484     slavio_serial_mem_readb,
 485 };
 486
 487 static CPUWriteMemoryFunc *slavio_serial_mem_write[3] = {
 488     slavio_serial_mem_writeb,
 489     slavio_serial_mem_writeb,
 490     slavio_serial_mem_writeb,
 491 };
 492
 493 static void slavio_serial_save_chn(QEMUFile *f, ChannelState *s)
 494 {
 495     qemu_put_be32s(f, &s->irq);
 496     qemu_put_be32s(f, &s->reg);
 497     qemu_put_be32s(f, &s->rxint);
 498     qemu_put_be32s(f, &s->txint);
 499     qemu_put_be32s(f, &s->rxint_under_svc);
 500     qemu_put_be32s(f, &s->txint_under_svc);
 501     qemu_put_8s(f, &s->rx);
 502     qemu_put_8s(f, &s->tx);
 503     qemu_put_buffer(f, s->wregs, 16);
 504     qemu_put_buffer(f, s->rregs, 16);
 505 }
 506
 507 static void slavio_serial_save(QEMUFile *f, void *opaque)
 508 {
 509     SerialState *s = opaque;
 510
 511     slavio_serial_save_chn(f, &s->chn[0]);
 512     slavio_serial_save_chn(f, &s->chn[1]);
 513 }
 514
 515 static int slavio_serial_load_chn(QEMUFile *f, ChannelState *s, int version_id)
 516 {
 517     if (version_id > 2)
 518         return -EINVAL;
 519
 520     qemu_get_be32s(f, &s->irq);
 521     qemu_get_be32s(f, &s->reg);
 522     qemu_get_be32s(f, &s->rxint);
 523     qemu_get_be32s(f, &s->txint);
 524     if (version_id >= 2) {
 525         qemu_get_be32s(f, &s->rxint_under_svc);
 526         qemu_get_be32s(f, &s->txint_under_svc);
 527     }
 528     qemu_get_8s(f, &s->rx);
 529     qemu_get_8s(f, &s->tx);
 530     qemu_get_buffer(f, s->wregs, 16);
 531     qemu_get_buffer(f, s->rregs, 16);
 532     return 0;
 533 }
 534
 535 static int slavio_serial_load(QEMUFile *f, void *opaque, int version_id)
 536 {
 537     SerialState *s = opaque;
 538     int ret;
 539
 540     ret = slavio_serial_load_chn(f, &s->chn[0], version_id);
 541     if (ret != 0)
 542         return ret;
 543     ret = slavio_serial_load_chn(f, &s->chn[1], version_id);
 544     return ret;
 545
 546 }
 547
 548 SerialState *slavio_serial_init(int base, int irq, CharDriverState *chr1, CharDriverState *chr2)
 549 {
 550     int slavio_serial_io_memory, i;
 551     SerialState *s;
 552
 553     s = qemu_mallocz(sizeof(SerialState));
 554     if (!s)
 555         return NULL;
 556
 557     slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read, slavio_serial_mem_write, s);
 558     cpu_register_physical_memory(base, SERIAL_MAXADDR, slavio_serial_io_memory);
 559
 560     s->chn[0].chr = chr1;
 561     s->chn[1].chr = chr2;
 562
 563     for (i = 0; i < 2; i++) {
 564         s->chn[i].irq = irq;
 565         s->chn[i].chn = 1 - i;
 566         s->chn[i].type = ser;
 567         if (s->chn[i].chr) {
 568             qemu_chr_add_read_handler(s->chn[i].chr, serial_can_receive, serial_receive1, &s->chn[i]);
 569             qemu_chr_add_event_handler(s->chn[i].chr, serial_event);
 570         }
 571     }
 572     s->chn[0].otherchn = &s->chn[1];
 573     s->chn[1].otherchn = &s->chn[0];
 574     register_savevm("slavio_serial", base, 2, slavio_serial_save, slavio_serial_load, s);
 575     qemu_register_reset(slavio_serial_reset, s);
 576     slavio_serial_reset(s);
 577     return s;
 578 }
 579
 580 static const uint8_t keycodes[128] = {
 581     127, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43, 53,
 582     54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 89, 76, 77, 78,
 583     79, 80, 81, 82, 83, 84, 85, 86, 87, 42, 99, 88, 100, 101, 102, 103,
 584     104, 105, 106, 107, 108, 109, 110, 47, 19, 121, 119, 5, 6, 8, 10, 12,
 585     14, 16, 17, 18, 7, 98, 23, 68, 69, 70, 71, 91, 92, 93, 125, 112,
 586     113, 114, 94, 50, 0, 0, 124, 9, 11, 0, 0, 0, 0, 0, 0, 0,
 587     90, 0, 46, 22, 13, 111, 52, 20, 96, 24, 28, 74, 27, 123, 44, 66,
 588     0, 45, 2, 4, 48, 0, 0, 21, 0, 0, 0, 0, 0, 120, 122, 67,
 589 };
 590
 591 static void sunkbd_event(void *opaque, int ch)
 592 {
 593     ChannelState *s = opaque;
 594     int release = ch & 0x80;
 595
 596     ch = keycodes[ch & 0x7f];
 597     KBD_DPRINTF("Keycode %d (%s)\n", ch, release? "release" : "press");
 598     put_queue(s, ch | release);
 599 }
 600
 601 static void handle_kbd_command(ChannelState *s, int val)
 602 {
 603     KBD_DPRINTF("Command %d\n", val);
 604     switch (val) {
 605     case 1: // Reset, return type code
 606         put_queue(s, 0xff);
 607         put_queue(s, 5); // Type 5
 608         break;
 609     case 7: // Query layout
 610         put_queue(s, 0xfe);
 611         put_queue(s, 0x20); // XXX, layout?
 612         break;
 613     default:
 614         break;
 615     }
 616 }
 617
 618 static void sunmouse_event(void *opaque,
 619                                int dx, int dy, int dz, int buttons_state)
 620 {
 621     ChannelState *s = opaque;
 622     int ch;
 623
 624     /* XXX: SDL sometimes generates nul events: we delete them */
 625     if (dx == 0 && dy == 0 && dz == 0 && buttons_state == 0)
 626         return;
 627     MS_DPRINTF("dx=%d dy=%d buttons=%01x\n", dx, dy, buttons_state);
 628
 629     ch = 0x80 | 0x7; /* protocol start byte, no buttons pressed */
 630
 631     if (buttons_state & MOUSE_EVENT_LBUTTON)
 632         ch ^= 0x4;
 633     if (buttons_state & MOUSE_EVENT_MBUTTON)
 634         ch ^= 0x2;
 635     if (buttons_state & MOUSE_EVENT_RBUTTON)
 636         ch ^= 0x1;
 637
 638     put_queue(s, ch);
 639
 640     ch = dx;
 641
 642     if (ch > 127)
 643         ch=127;
 644     else if (ch < -127)
 645         ch=-127;
 646
 647     put_queue(s, ch & 0xff);
 648
 649     ch = -dy;
 650
 651     if (ch > 127)
 652         ch=127;
 653     else if (ch < -127)
 654         ch=-127;
 655
 656     put_queue(s, ch & 0xff);
 657
 658     // MSC protocol specify two extra motion bytes
 659
 660     put_queue(s, 0);
 661     put_queue(s, 0);
 662 }
 663
 664 void slavio_serial_ms_kbd_init(int base, int irq)
 665 {
 666     int slavio_serial_io_memory, i;
 667     SerialState *s;
 668
 669     s = qemu_mallocz(sizeof(SerialState));
 670     if (!s)
 671         return;
 672     for (i = 0; i < 2; i++) {
 673         s->chn[i].irq = irq;
 674         s->chn[i].chn = 1 - i;
 675         s->chn[i].chr = NULL;
 676     }
 677     s->chn[0].otherchn = &s->chn[1];
 678     s->chn[1].otherchn = &s->chn[0];
 679     s->chn[0].type = mouse;
 680     s->chn[1].type = kbd;
 681
 682     slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read, slavio_serial_mem_write, s);
 683     cpu_register_physical_memory(base, SERIAL_MAXADDR, slavio_serial_io_memory);
 684
 685     qemu_add_mouse_event_handler(sunmouse_event, &s->chn[0], 0);
 686     qemu_add_kbd_event_handler(sunkbd_event, &s->chn[1]);
 687     qemu_register_reset(slavio_serial_reset, s);
 688     slavio_serial_reset(s);
 689 }