palacios/src/devices/ramdisk.c

   1 /*
   2  *
   3  *   Copyright (C) 2002  MandrakeSoft S.A.
   4  *
   5  *     MandrakeSoft S.A.
   6  *     43, rue d'Aboukir
   7  *     75002 Paris - France
   8  *     http://www.linux-mandrake.com/
   9  *     http://www.mandrakesoft.com/
  10  *
  11  *   This library is free software; you can redistribute it and/or
  12  *   modify it under the terms of the GNU Lesser General Public
  13  *   License as published by the Free Software Foundation; either
  14  *   version 2 of the License, or (at your option) any later version.
  15  *
  16  *   This library is distributed in the hope that it will be useful,
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  *   Lesser General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU Lesser General Public
  22  *  License along with this library; if not, write to the Free Software
  23  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  24  *
  25  * Major modifications made for the V3VEE project
  26  *
  27  * The V3VEE Project is a joint project between Northwestern University
  28  * and the University of New Mexico.  You can find out more at
  29  * http://www.v3vee.org
  30  *
  31  * Copyright (c) 2008, Zheng Cui <cuizheng@cs.unm.edu>
  32  * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
  33  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
  34  * All rights reserved for original changes
  35  *
  36  */
  37
  38
  39 #include <devices/ramdisk.h>
  40 #include <palacios/vmm.h>
  41 #include <devices/cdrom.h>
  42 #include <devices/ide.h>
  43
  44
  45 #ifndef DEBUG_RAMDISK
  46 #undef PrintDebug
  47 #define PrintDebug(_f, _a...)
  48 #endif
  49
  50
  51 /*
  52  * Data type definitions
  53  *
  54  */
  55 #define INDEX_PULSE_CYCLE 10
  56
  57
  58
  59
  60 #define INTR_REASON_BIT_ERR           0x01
  61 #define UNABLE_FIND_TAT_CHANNEL_ERR   0x02
  62 #define DRQ_ERR                       0x03
  63 #define READ_BUF_GT_512               0x04
  64
  65
  66
  67 #define PRI_DATA_PORT         0x1f0
  68 #define PRI_FEATURES_PORT     0x1f1
  69 #define PRI_SECT_CNT_PORT     0x1f2
  70 #define PRI_SECT_ADDR1_PORT   0x1f3
  71 #define PRI_SECT_ADDR2_PORT   0x1f4
  72 #define PRI_SECT_ADDR3_PORT   0x1f5
  73 #define PRI_DRV_SEL_PORT      0x1f6
  74 #define PRI_CMD_PORT          0x1f7
  75 #define PRI_CTRL_PORT         0x3f6
  76 #define PRI_ADDR_REG_PORT     0x3f7
  77
  78 #define SEC_DATA_PORT         0x170
  79 #define SEC_FEATURES_PORT     0x171
  80 #define SEC_SECT_CNT_PORT     0x172
  81 #define SEC_SECT_ADDR1_PORT   0x173
  82 #define SEC_SECT_ADDR2_PORT   0x174
  83 #define SEC_SECT_ADDR3_PORT   0x175
  84 #define SEC_DRV_SEL_PORT      0x176
  85 #define SEC_CMD_PORT          0x177
  86 #define SEC_CTRL_PORT         0x376
  87 #define SEC_ADDR_REG_PORT     0x377
  88
  89
  90
  91
  92
  93 #define PACKET_SIZE 12
  94
  95
  96 /*
  97  * Debug facilities
  98  */
  99
 100 #define ATA_DETECT                     0xf0 //0X3E8
 101 #define ATA_RESET                      0xf1 //0X3E9
 102 #define ATA_CMD_DATA_IN                0xf2 //0X3EA
 103 #define ATA_CMD_DATA_OUT               0xf3 //0X3EB
 104 #define ATA_CMD_PACKET                 0xf4 //0X3EC
 105 #define ATAPI_GET_SENSE                0xf5 //0X3ED
 106 #define ATAPI_IS_READY                 0xf6 //0X3EE
 107 #define ATAPI_IS_CDROM                 0xf7 //0X3EF
 108
 109 #define CDEMU_INIT                     0xf8 //0X2E8
 110 #define CDEMU_ISACTIVE                 0xf9 //0X2E9
 111 #define CDEMU_EMULATED_DRIVE           0xfa //0X2EA
 112 #define CDROM_BOOT                     0xfb //0X2EB
 113
 114
 115 #define HARD_DRIVE_POST                0xfc //0X2EC
 116
 117
 118 #define ATA_DEVICE_NO                  0xfd //0X2ED
 119 #define ATA_DEVICE_TYPE                0xfe //0X2ED
 120
 121 #define INT13_HARDDISK                 0xff //0x2ef
 122 #define INT13_CDROM                    0xe0 //0x2f8
 123 #define INT13_CDEMU                    0xe1 //0x2f9
 124 #define INT13_ELTORITO                 0xe2 //0x2fa
 125 #define INT13_DISKETTE_FUNCTION        0xe3 //0x2fb
 126
 127
 128
 129
 130 static const char cdrom_str[] = "CD-ROM";
 131 static const char harddisk_str[] = "HARDDISK";
 132 static const char none_str[] = "NONE";
 133
 134
 135 static inline const char * device_type_to_str(device_type_t type) {
 136   switch (type) {
 137   case IDE_DISK:
 138     return harddisk_str;
 139   case IDE_CDROM:
 140     return cdrom_str;
 141   case IDE_NONE:
 142     return none_str;
 143   default:
 144     return NULL;
 145   }
 146 }
 147
 148
 149 static inline void write_features(struct channel_t * channel, uchar_t value) {
 150   channel->drives[0].controller.features = value;
 151   channel->drives[1].controller.features = value;
 152 }
 153
 154
 155 static inline void write_sector_count(struct channel_t * channel, uchar_t value) {
 156   channel->drives[0].controller.sector_count = value;
 157   channel->drives[1].controller.sector_count = value;
 158 }
 159
 160 static inline void write_sector_number(struct channel_t * channel, uchar_t value) {
 161   channel->drives[0].controller.sector_no = value;
 162   channel->drives[1].controller.sector_no = value;
 163 }
 164
 165
 166 static inline void write_cylinder_low(struct channel_t * channel, uchar_t value) {
 167   channel->drives[0].controller.cylinder_no &= 0xff00;
 168   channel->drives[0].controller.cylinder_no |= value;
 169   channel->drives[1].controller.cylinder_no &= 0xff00;
 170   channel->drives[1].controller.cylinder_no |= value;
 171 }
 172
 173 static inline void write_cylinder_high(struct channel_t * channel, uchar_t value) {
 174   ushort_t val2 = value;
 175   val2 = val2 << 8;
 176   channel->drives[0].controller.cylinder_no &= 0x00ff;
 177   channel->drives[0].controller.cylinder_no |= (val2 & 0xff00);
 178
 179   channel->drives[1].controller.cylinder_no &= 0x00ff;
 180   channel->drives[1].controller.cylinder_no |= (val2 & 0xff00);
 181 }
 182
 183 static inline void write_head_no(struct channel_t * channel, uchar_t value) {
 184   channel->drives[0].controller.head_no = value;
 185   channel->drives[1].controller.head_no = value;
 186 }
 187
 188 static inline void write_lba_mode(struct channel_t * channel, uchar_t value) {
 189   channel->drives[0].controller.lba_mode = value;
 190   channel->drives[1].controller.lba_mode = value;
 191 }
 192
 193
 194 static inline uint_t get_channel_no(struct ramdisk_t * ramdisk, struct channel_t * channel) {
 195   return (((uchar_t *)channel - (uchar_t *)(ramdisk->channels)) / sizeof(struct channel_t));
 196 }
 197
 198 static inline uint_t get_drive_no(struct channel_t * channel, struct drive_t * drive) {
 199   return (((uchar_t *)drive - (uchar_t*)(channel->drives)) /  sizeof(struct drive_t));
 200 }
 201
 202 static inline struct drive_t * get_selected_drive(struct channel_t * channel) {
 203   return &(channel->drives[channel->drive_select]);
 204 }
 205
 206
 207 static inline int is_primary_port(struct ramdisk_t * ramdisk, ushort_t port) {
 208   switch(port)
 209     {
 210     case PRI_DATA_PORT:
 211     case PRI_FEATURES_PORT:
 212     case PRI_SECT_CNT_PORT:
 213     case PRI_SECT_ADDR1_PORT:
 214     case PRI_SECT_ADDR2_PORT:
 215     case PRI_SECT_ADDR3_PORT:
 216     case PRI_DRV_SEL_PORT:
 217     case PRI_CMD_PORT:
 218     case PRI_CTRL_PORT:
 219       return 1;
 220     default:
 221       return 0;
 222     }
 223 }
 224
 225
 226
 227 static inline int is_secondary_port(struct ramdisk_t * ramdisk, ushort_t port) {
 228   switch(port)
 229     {
 230     case SEC_DATA_PORT:
 231     case SEC_FEATURES_PORT:
 232     case SEC_SECT_CNT_PORT:
 233     case SEC_SECT_ADDR1_PORT:
 234     case SEC_SECT_ADDR2_PORT:
 235     case SEC_SECT_ADDR3_PORT:
 236     case SEC_DRV_SEL_PORT:
 237     case SEC_CMD_PORT:
 238     case SEC_CTRL_PORT:
 239       return 1;
 240     default:
 241       return 0;
 242     }
 243 }
 244
 245 static inline int num_drives_on_channel(struct channel_t * channel) {
 246   if ((channel->drives[0].device_type == IDE_NONE) &&
 247       (channel->drives[1].device_type == IDE_NONE)) {
 248     return 0;
 249   } else if ((channel->drives[0].device_type != IDE_NONE) &&
 250              (channel->drives[1].device_type != IDE_NONE)) {
 251     return 2;
 252   } else {
 253     return 1;
 254   }
 255 }
 256
 257
 258
 259 static inline uchar_t extract_bits(uchar_t * buf, uint_t buf_offset, uint_t bit_offset, uint_t num_bits) {
 260   uchar_t val = buf[buf_offset];
 261   val = val >> bit_offset;
 262   val &= ((1 << num_bits) -1);
 263   return val;
 264 }
 265
 266
 267 static inline uchar_t get_packet_field(struct channel_t * channel, uint_t packet_offset, uint_t bit_offset, uint_t num_bits) {
 268   struct drive_t * drive = get_selected_drive(channel);
 269   return extract_bits(drive->controller.buffer, packet_offset, bit_offset, num_bits);
 270 }
 271
 272
 273 static inline uchar_t get_packet_byte(struct channel_t * channel, uint_t offset) {
 274   struct drive_t * drive = get_selected_drive(channel);
 275   return drive->controller.buffer[offset];
 276 }
 277
 278 static inline uint16_t get_packet_word(struct channel_t * channel, uint_t offset) {
 279   struct drive_t * drive = get_selected_drive(channel);
 280   uint16_t val = drive->controller.buffer[offset];
 281   val = val << 8;
 282   val |= drive->controller.buffer[offset + 1];
 283   return val;
 284 }
 285
 286
 287 static inline uint16_t rd_read_16bit(const uint8_t* buf) {
 288   return (buf[0] << 8) | buf[1];
 289 }
 290
 291
 292
 293 static inline uint32_t rd_read_32bit(const uint8_t* buf) {
 294   return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
 295 }
 296
 297 ////////////////////////////////////////////////////////////////////////////
 298
 299
 300 /*
 301  * ATAPI routines
 302  */
 303
 304
 305 static void rd_init_mode_sense_single(struct vm_device * dev, struct channel_t * channel, const void * src, int size);
 306
 307 static void rd_command_aborted(struct vm_device * dev, struct channel_t * channel, unsigned value);
 308
 309
 310
 311
 312 static int handle_atapi_packet_command(struct vm_device * dev,
 313                                        struct channel_t * channel,
 314                                        ushort_t val);
 315
 316 static int rd_init_send_atapi_command(struct vm_device * dev,
 317                                       struct channel_t * channel,
 318                                       Bit8u command, int req_length,
 319                                       int alloc_length, bool lazy);
 320
 321 static void rd_ready_to_send_atapi(struct vm_device * dev,
 322                                    struct channel_t * channel);
 323
 324 static void rd_atapi_cmd_error(struct vm_device * dev,
 325                                struct channel_t * channel,
 326                                sense_t sense_key, asc_t asc);
 327
 328 static void rd_atapi_cmd_nop(struct vm_device * dev, struct channel_t * channel);
 329 static void rd_identify_ATAPI_drive(struct vm_device * dev, struct channel_t * channel);
 330
 331
 332
 333 /*
 334  * Interrupt handling
 335  */
 336 static void rd_raise_interrupt(struct vm_device * dev, struct channel_t * channel);
 337 static void rd_lower_irq(struct vm_device *dev, Bit32u irq);
 338
 339
 340
 341 /*
 342  * Helper routines
 343  */
 344
 345
 346
 347 #ifdef DEBUG_RAMDISK
 348 static void rd_print_state(struct ramdisk_t *ramdisk);
 349 static int check_bit_fields(struct controller_t * controller);
 350 #endif
 351 ////////////////////////////////////////////////////////////////////
 352
 353
 354
 355
 356
 357 int v3_ramdisk_register_cdrom(struct vm_device * dev, uint_t busID, uint_t driveID, struct cdrom_ops* cd, void * private_data) {
 358   struct ramdisk_t * ramdisk  = (struct ramdisk_t *)(dev->private_data);
 359   struct channel_t * channel = &(ramdisk->channels[busID]);
 360   struct drive_t * drive = &(channel->drives[driveID]);
 361   struct controller_t * controller = &(drive->controller);
 362
 363
 364
 365   if (drive->device_type != IDE_NONE) {
 366     PrintError("Device already registered at this location\n");
 367     return -1;
 368   }
 369
 370
 371   channel->irq =  15;
 372
 373   // Make model string
 374   strncpy((char*)(drive->model_no), "V3VEE Ramdisk", 40);
 375
 376   while (strlen((char *)(drive->model_no)) < 40) {
 377     strcat ((char*)(drive->model_no), " ");
 378   }
 379
 380   PrintDebug("CDROM on target %d/%d\n", busID, driveID);
 381
 382   drive->device_type = IDE_CDROM;
 383   drive->cdrom.locked = 0;
 384   drive->sense.sense_key = SENSE_NONE;
 385   drive->sense.asc = 0;
 386   drive->sense.ascq = 0;
 387
 388   drive->private_data = private_data;
 389
 390 #ifdef DEBUG_RAMDISK
 391   if (check_bit_fields(controller) == INTR_REASON_BIT_ERR) {
 392     PrintDebug("interrupt reason: bit field error\n");
 393     return INTR_REASON_BIT_ERR;
 394   }
 395 #endif
 396
 397   controller->sector_count = 0;
 398
 399   drive->cdrom.cd = cd;
 400
 401   PrintDebug("\t\tCD on ata%d-%d: '%s'\n",
 402              busID,
 403              driveID, "");
 404
 405   if(drive->cdrom.cd->insert_cdrom(drive->private_data)) {
 406     PrintDebug("\t\tMedia present in CD-ROM drive\n");
 407     drive->cdrom.ready = 1;
 408     drive->cdrom.capacity = drive->cdrom.cd->capacity(drive->private_data);
 409     PrintDebug("\t\tCDROM capacity is %d\n", drive->cdrom.capacity);
 410   } else {
 411     PrintDebug("\t\tCould not locate CD-ROM, continuing with media not present\n");
 412     drive->cdrom.ready = 0;
 413   }
 414
 415   return 0;
 416 }
 417
 418
 419 static Bit32u rd_init_hardware(struct ramdisk_t *ramdisk) {
 420   uint_t channel_num;
 421   uint_t device;
 422   struct channel_t *channels = (struct channel_t *)(&(ramdisk->channels));
 423
 424   PrintDebug("[rd_init_harddrive]\n");
 425
 426   for (channel_num = 0; channel_num < MAX_ATA_CHANNEL; channel_num++) {
 427     memset((char *)(channels + channel_num), 0, sizeof(struct channel_t));
 428   }
 429
 430   for (channel_num = 0; channel_num < MAX_ATA_CHANNEL; channel_num++){
 431     struct channel_t * channel = &(channels[channel_num]);
 432
 433     channel->ioaddr1 = 0x0;
 434     channel->ioaddr2 = 0x0;
 435     channel->irq = 0;
 436
 437     for (device = 0; device < 2; device++){
 438       struct drive_t * drive = &(channel->drives[device]);
 439       struct controller_t * controller = &(drive->controller);
 440
 441       controller->status.busy = 0;
 442       controller->status.drive_ready = 1;
 443       controller->status.write_fault = 0;
 444       controller->status.seek_complete = 1;
 445       controller->status.drq = 0;
 446       controller->status.corrected_data = 0;
 447       controller->status.index_pulse = 0;
 448       controller->status.index_pulse_count = 0;
 449       controller->status.err = 0;
 450
 451       controller->error_register = 0x01; // diagnostic code: no error
 452       controller->head_no = 0;
 453       controller->sector_count = 1;
 454       controller->sector_no = 1;
 455       controller->cylinder_no = 0;
 456       controller->current_command = 0x00;
 457       controller->buffer_index = 0;
 458
 459       controller->control.reset = 0;
 460       controller->control.disable_irq = 0;
 461       controller->reset_in_progress = 0;
 462
 463       controller->sectors_per_block = 0x80;
 464       controller->lba_mode = 0;
 465
 466
 467       controller->features = 0;
 468
 469       // If not present
 470       drive->device_type = IDE_NONE;
 471
 472       // Make model string
 473       strncpy((char*)(drive->model_no), "", 40);
 474       while(strlen((char *)(drive->model_no)) < 40) {
 475         strcat ((char*)(drive->model_no), " ");
 476       }
 477
 478     }//for device
 479   }//for channel
 480
 481 #ifdef DEBUG_RAMDISK
 482   rd_print_state(ramdisk);
 483 #endif
 484   return 0;
 485 }
 486
 487
 488 /*
 489   static void rd_reset_harddrive(struct ramdisk_t *ramdisk, unsigned type) {
 490   return;
 491   }
 492
 493 */
 494 static void rd_close_harddrive(struct ramdisk_t *ramdisk) {
 495   return;
 496 }
 497
 498
 499 ////////////////////////////////////////////////////////////////////
 500
 501
 502
 503 static int read_data_port(ushort_t port, void * dst, uint_t length, struct vm_device * dev) {
 504   struct ramdisk_t * ramdisk  = (struct ramdisk_t *)(dev->private_data);
 505   struct channel_t * channel = NULL;
 506   struct drive_t * drive = NULL;
 507   struct controller_t * controller = NULL;
 508
 509
 510
 511   if (is_primary_port(ramdisk, port)) {
 512     channel = &(ramdisk->channels[0]);
 513   } else if (is_secondary_port(ramdisk, port)) {
 514     channel = &(ramdisk->channels[1]);
 515   } else {
 516     PrintError("Invalid Port: %d\n", port);
 517     return -1;
 518   }
 519
 520   drive = get_selected_drive(channel);
 521   controller = &(drive->controller);
 522
 523
 524   PrintDebug("[read_data_handler] IO Read at 0x%x, on drive %d/%d (current_cmd = 0x%02x)\n",
 525              port,
 526              get_channel_no(ramdisk, channel),
 527              get_drive_no(channel, drive),
 528              controller->current_command);
 529
 530   switch (controller->current_command) {
 531   case 0xec:    // IDENTIFY DEVICE
 532   case 0xa1:
 533     {
 534
 535
 536       controller->status.busy = 0;
 537       controller->status.drive_ready = 1;
 538       controller->status.write_fault = 0;
 539       controller->status.seek_complete = 1;
 540       controller->status.corrected_data = 0;
 541       controller->status.err = 0;
 542
 543       /*
 544         value32 = controller->buffer[index];
 545         index++;
 546
 547         if (io_len >= 2) {
 548         value32 |= (controller->buffer[index] << 8);
 549         index++;
 550         }
 551
 552         if (io_len == 4) {
 553         value32 |= (controller->buffer[index] << 16);
 554         value32 |= (controller->buffer[index+1] << 24);
 555         index += 2;
 556         }
 557
 558         controller->buffer_index = index;
 559       */
 560       /* JRL */
 561       memcpy(dst, controller->buffer + controller->buffer_index, length);
 562       controller->buffer_index += length;
 563
 564       if (controller->buffer_index >= 512) {
 565         controller->status.drq = 0;
 566       }
 567
 568       return length;
 569     }
 570   case 0xa0: //send packet cmd
 571     {
 572       uint_t index = controller->buffer_index;
 573
 574
 575       PrintDebug("\t\tatapi.command(%02x), index(%d), cdrom.remaining_blocks(%d)\n",
 576                     drive->atapi.command,
 577                     index,
 578                     drive->cdrom.remaining_blocks);
 579
 580       // Load block if necessary
 581       if (index >= 2048) {
 582
 583         if (index > 2048) {
 584           PrintError("\t\tindex > 2048 : 0x%x\n", index);
 585           return -1;
 586         }
 587
 588         switch (drive->atapi.command) {
 589         case 0x28: // read (10)
 590         case 0xa8: // read (12)
 591           {
 592
 593             if (!(drive->cdrom.ready)) {
 594               PrintError("\t\tRead with CDROM not ready\n");
 595               return -1;
 596             }
 597
 598             drive->cdrom.cd->read_block(drive->private_data, controller->buffer,
 599                                         drive->cdrom.next_lba);
 600             drive->cdrom.next_lba++;
 601             drive->cdrom.remaining_blocks--;
 602
 603
 604             if (!(drive->cdrom.remaining_blocks)) {
 605               PrintDebug("\t\tLast READ block loaded {CDROM}\n");
 606             } else {
 607               PrintDebug("\t\tREAD block loaded (%d remaining) {CDROM}\n",
 608                          drive->cdrom.remaining_blocks);
 609             }
 610
 611             // one block transfered, start at beginning
 612             index = 0;
 613             break;
 614           }
 615         default: // no need to load a new block
 616           break;
 617         }
 618       }
 619
 620
 621       /*
 622         increment = 0;
 623         value32 = controller->buffer[index + increment];
 624         increment++;
 625
 626         if (io_len >= 2) {
 627         value32 |= (controller->buffer[index + increment] << 8);
 628         increment++;
 629         }
 630
 631         if (io_len == 4) {
 632         value32 |= (controller->buffer[index + increment] << 16);
 633         value32 |= (controller->buffer[index + increment + 1] << 24);
 634         increment += 2;
 635         }
 636
 637         controller->buffer_index = index + increment;
 638         controller->drq_index += increment;
 639
 640       */
 641       /* JRL: CHECK THAT there is enough data in the buffer to copy.... */
 642       {
 643         memcpy(dst, controller->buffer + index, length);
 644
 645         controller->buffer_index  = index + length;
 646         controller->drq_index += length;
 647       }
 648
 649       /* *** */
 650
 651       if (controller->drq_index >= (unsigned)drive->atapi.drq_bytes) {
 652         controller->status.drq = 0;
 653         controller->drq_index = 0;
 654
 655         drive->atapi.total_bytes_remaining -= drive->atapi.drq_bytes;
 656
 657         if (drive->atapi.total_bytes_remaining > 0) {
 658           // one or more blocks remaining (works only for single block commands)
 659
 660           PrintDebug("\t\tPACKET drq bytes read\n");
 661           controller->interrupt_reason.i_o = 1;
 662           controller->status.busy = 0;
 663           controller->status.drq = 1;
 664           controller->interrupt_reason.c_d = 0;
 665
 666           // set new byte count if last block
 667           if (drive->atapi.total_bytes_remaining < controller->byte_count) {
 668             controller->byte_count = drive->atapi.total_bytes_remaining;
 669           }
 670           drive->atapi.drq_bytes = controller->byte_count;
 671
 672           rd_raise_interrupt(dev, channel);
 673         } else {
 674           // all bytes read
 675           PrintDebug("\t\tPACKET all bytes read\n");
 676
 677           controller->interrupt_reason.i_o = 1;
 678           controller->interrupt_reason.c_d = 1;
 679           controller->status.drive_ready = 1;
 680           controller->interrupt_reason.rel = 0;
 681           controller->status.busy = 0;
 682           controller->status.drq = 0;
 683           controller->status.err = 0;
 684
 685           rd_raise_interrupt(dev, channel);
 686         }
 687       }
 688       return length;
 689       break;
 690     }
 691
 692   default:
 693     PrintDebug("\t\tread need support more command: %02x\n", controller->current_command);
 694     break;
 695   }
 696
 697   return -1;
 698 }
 699
 700
 701
 702
 703 static int write_data_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
 704   struct ramdisk_t * ramdisk  = (struct ramdisk_t *)(dev->private_data);
 705   struct channel_t * channel = NULL;
 706   struct drive_t * drive = NULL;
 707   struct controller_t * controller = NULL;
 708
 709   if (is_primary_port(ramdisk, port)) {
 710     channel = &(ramdisk->channels[0]);
 711   } else if (is_secondary_port(ramdisk, port)) {
 712     channel = &(ramdisk->channels[1]);
 713   } else {
 714     PrintError("Invalid Port: %d\n", port);
 715     return -1;
 716   }
 717
 718   drive = get_selected_drive(channel);
 719   controller = &(drive->controller);
 720
 721   PrintDebug("[write_data_handler] IO write at 0x%x, current_cmd = 0x%02x\n",
 722              port, controller->current_command);
 723
 724   switch (controller->current_command) {
 725   case 0x30: // WRITE SECTORS
 726     PrintError("\t\tneed to implement 0x30(write sector) to port 0x%x\n", port);
 727     return -1;
 728
 729   case 0xa0: // PACKET
 730
 731     if (handle_atapi_packet_command(dev, channel, *(ushort_t *)src) == -1) {
 732       return -1;
 733     }
 734
 735     return length;
 736
 737   default:
 738     PrintError("\t\tIO write(0x%x): current command is %02xh\n",
 739                port, controller->current_command);
 740
 741     return -1;
 742   }
 743 }
 744
 745
 746
 747
 748
 749
 750
 751 static int read_status_port(ushort_t port, void * dst, uint_t length, struct vm_device * dev) {
 752   struct ramdisk_t * ramdisk  = (struct ramdisk_t *)(dev->private_data);
 753   struct channel_t * channel = NULL;
 754   struct drive_t * drive = NULL;
 755   struct controller_t * controller = NULL;
 756
 757
 758   if (length != 1) {
 759     PrintError("Invalid Status port read length: %d (port=%d)\n", length, port);
 760     return -1;
 761   }
 762
 763   if (is_primary_port(ramdisk, port)) {
 764     channel = &(ramdisk->channels[0]);
 765   } else if (is_secondary_port(ramdisk, port)) {
 766     channel = &(ramdisk->channels[1]);
 767   } else {
 768     PrintError("Invalid Port: %d\n", port);
 769     return -1;
 770   }
 771
 772   drive = get_selected_drive(channel);
 773   controller = &(drive->controller);
 774
 775   PrintDebug("[read_status_handler] IO read at 0x%x, on drive %d/%d\n",
 776              port, get_channel_no(ramdisk, channel),
 777              channel->drive_select);
 778
 779
 780   if (num_drives_on_channel(channel) == 0) {
 781     // (mch) Just return zero for these registers
 782     memset(dst, 0, length);
 783
 784   } else {
 785     uchar_t val = (
 786                    (controller->status.busy << 7)            |
 787                    (controller->status.drive_ready << 6)     |
 788                    (controller->status.write_fault << 5)     |
 789                    (controller->status.seek_complete << 4)   |
 790                    (controller->status.drq << 3)             |
 791                    (controller->status.corrected_data << 2)  |
 792                    (controller->status.index_pulse << 1)     |
 793                    (controller->status.err) );
 794
 795     memcpy(dst, &val, length);
 796
 797     controller->status.index_pulse_count++;
 798     controller->status.index_pulse = 0;
 799
 800     if (controller->status.index_pulse_count >= INDEX_PULSE_CYCLE) {
 801       controller->status.index_pulse = 1;
 802       controller->status.index_pulse_count = 0;
 803     }
 804   }
 805
 806   if ((port == SEC_CMD_PORT) || (port == PRI_CMD_PORT)) {
 807     rd_lower_irq(dev, channel->irq);
 808   }
 809
 810   return length;
 811
 812 }
 813
 814
 815 static int write_cmd_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
 816   struct ramdisk_t * ramdisk  = (struct ramdisk_t *)(dev->private_data);
 817   struct channel_t * channel = NULL;
 818   struct drive_t * drive = NULL;
 819   struct controller_t * controller = NULL;
 820   uchar_t value = *(uchar_t *)src;
 821
 822   if (length != 1) {
 823     PrintError("Invalid Command port write length: %d (port=%d)\n", length, port);
 824     return -1;
 825   }
 826
 827   if (is_primary_port(ramdisk, port)) {
 828     channel = &(ramdisk->channels[0]);
 829   } else if (is_secondary_port(ramdisk, port)) {
 830     channel = &(ramdisk->channels[1]);
 831   } else {
 832     PrintError("Invalid Port: %d\n", port);
 833     return -1;
 834   }
 835
 836   drive = get_selected_drive(channel);
 837   controller = &(drive->controller);
 838
 839
 840   PrintDebug("[write_command_handler] IO write at 0x%x, on drive %d/%d (val = 0x%x)\n",
 841              port, get_channel_no(ramdisk, channel),
 842              channel->drive_select,
 843              value);
 844
 845   switch (value) {
 846   case 0xec: // IDENTIFY DEVICE
 847     {
 848       if (drive->device_type == IDE_NONE) {
 849         PrintError("\t\tError: disk ata%d-%d not present, aborting\n",
 850                    get_channel_no(ramdisk, channel),
 851                    get_drive_no(channel, drive));
 852         rd_command_aborted(dev, channel, value);
 853         break;
 854       } else if (drive->device_type == IDE_CDROM) {
 855         controller->head_no        = 0;
 856         controller->sector_count   = 1;
 857         controller->sector_no      = 1;
 858         controller->cylinder_no    = 0xeb14;
 859         rd_command_aborted(dev, channel, 0xec);
 860       } else {
 861         PrintError("\t\tError: Want to identify HDD!!\n");
 862         /*
 863           SELECTED_CONTROLLER(channel).current_command = value;
 864           SELECTED_CONTROLLER(channel).error_register = 0;
 865
 866           // See ATA/ATAPI-4, 8.12
 867           SELECTED_CONTROLLER(channel).status.busy  = 0;
 868           SELECTED_CONTROLLER(channel).status.drive_ready = 1;
 869           SELECTED_CONTROLLER(channel).status.write_fault = 0;
 870           SELECTED_CONTROLLER(channel).status.drq   = 1;
 871           SELECTED_CONTROLLER(channel).status.err   = 0;
 872
 873           SELECTED_CONTROLLER(channel).status.seek_complete = 1;
 874           SELECTED_CONTROLLER(channel).status.corrected_data = 0;
 875
 876           SELECTED_CONTROLLER(channel).buffer_index = 0;
 877           raise_interrupt(channel);
 878           identify_drive(channel);
 879         */
 880       }
 881
 882     break;
 883     }
 884     // ATAPI commands
 885   case 0xa1: // IDENTIFY PACKET DEVICE
 886     {
 887       if (drive->device_type == IDE_CDROM) {
 888         controller->current_command = value;
 889         controller->error_register = 0;
 890
 891         controller->status.busy = 0;
 892         controller->status.drive_ready = 1;
 893         controller->status.write_fault = 0;
 894         controller->status.drq   = 1;
 895         controller->status.err   = 0;
 896
 897         controller->status.seek_complete = 1;
 898         controller->status.corrected_data = 0;
 899
 900         controller->buffer_index = 0;
 901         rd_raise_interrupt(dev, channel);
 902         rd_identify_ATAPI_drive(dev, channel);
 903       } else {
 904         rd_command_aborted(dev, channel, 0xa1);
 905       }
 906       break;
 907     }
 908   case 0xa0: // SEND PACKET (atapi)
 909     {
 910       if (drive->device_type == IDE_CDROM) {
 911         // PACKET
 912
 913         if (controller->features & (1 << 0)) {
 914           PrintError("\t\tPACKET-DMA not supported");
 915           return -1;
 916         }
 917
 918         if (controller->features & (1 << 1)) {
 919           PrintError("\t\tPACKET-overlapped not supported");
 920           return -1;
 921         }
 922
 923         // We're already ready!
 924         controller->sector_count = 1;
 925         controller->status.busy = 0;
 926         controller->status.write_fault = 0;
 927
 928         // serv bit??
 929         controller->status.drq = 1;
 930         controller->status.err = 0;
 931
 932         // NOTE: no interrupt here
 933         controller->current_command = value;
 934         controller->buffer_index = 0;
 935       } else {
 936         rd_command_aborted (dev, channel, 0xa0);
 937       }
 938       break;
 939     }
 940   default:
 941     PrintError("\t\tneed translate command %2x\n", value);
 942     //return -1;
 943     /* JRL THIS NEEDS TO CHANGE */
 944     return length;
 945
 946   }
 947   return length;
 948 }
 949
 950
 951 static int write_ctrl_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
 952   struct ramdisk_t * ramdisk  = (struct ramdisk_t *)(dev->private_data);
 953   struct channel_t * channel = NULL;
 954   struct drive_t * master_drive = NULL;
 955   struct drive_t * slave_drive = NULL;
 956   struct controller_t * controller = NULL;
 957   uchar_t value = *(uchar_t *)src;
 958   rd_bool prev_control_reset;
 959
 960   if (length != 1) {
 961     PrintError("Invalid Status port read length: %d (port=%d)\n", length, port);
 962     return -1;
 963   }
 964
 965   if (is_primary_port(ramdisk, port)) {
 966     channel = &(ramdisk->channels[0]);
 967   } else if (is_secondary_port(ramdisk, port)) {
 968     channel = &(ramdisk->channels[1]);
 969   } else {
 970     PrintError("Invalid Port: %d\n", port);
 971     return -1;
 972   }
 973
 974   master_drive = &(channel->drives[0]);
 975   slave_drive = &(channel->drives[1]);
 976
 977   controller = &(get_selected_drive(channel)->controller);
 978
 979
 980   PrintDebug("[write_control_handler] IO write at 0x%x, on drive %d/%d (val = 0x%x)\n",
 981              port, get_channel_no(ramdisk, channel),
 982              channel->drive_select,
 983              value);
 984
 985   // (mch) Even if device 1 was selected, a write to this register
 986   // goes to device 0 (if device 1 is absent)
 987
 988   prev_control_reset = controller->control.reset;
 989
 990   master_drive->controller.control.reset         = value & 0x04;
 991   slave_drive->controller.control.reset         = value & 0x04;
 992
 993   // CGS: was: SELECTED_CONTROLLER(channel).control.disable_irq    = value & 0x02;
 994   master_drive->controller.control.disable_irq = value & 0x02;
 995   slave_drive->controller.control.disable_irq = value & 0x02;
 996
 997   PrintDebug("\t\tadpater control reg: reset controller = %d\n",
 998                 (unsigned) (controller->control.reset) ? 1 : 0);
 999   PrintDebug("\t\tadpater control reg: disable_irq(X) = %d\n",
1000                 (unsigned) (controller->control.disable_irq) ? 1 : 0);
1001
1002   if ((!prev_control_reset) && (controller->control.reset)) {
1003     uint_t id = 0;
1004
1005     // transition from 0 to 1 causes all drives to reset
1006     PrintDebug("\t\thard drive: RESET\n");
1007
1008     // (mch) Set BSY, drive not ready
1009     for (id = 0; id < 2; id++) {
1010       struct controller_t * ctrl = NULL;
1011
1012       if (id == 0) {
1013         ctrl = &(master_drive->controller);
1014       } else if (id == 1) {
1015         ctrl = &(slave_drive->controller);
1016       }
1017
1018       ctrl->status.busy           = 1;
1019       ctrl->status.drive_ready    = 0;
1020       ctrl->reset_in_progress     = 1;
1021
1022       ctrl->status.write_fault    = 0;
1023       ctrl->status.seek_complete  = 1;
1024       ctrl->status.drq            = 0;
1025       ctrl->status.corrected_data = 0;
1026       ctrl->status.err            = 0;
1027
1028       ctrl->error_register = 0x01; // diagnostic code: no error
1029
1030       ctrl->current_command = 0x00;
1031       ctrl->buffer_index = 0;
1032
1033       ctrl->sectors_per_block = 0x80;
1034       ctrl->lba_mode          = 0;
1035
1036       ctrl->control.disable_irq = 0;
1037     }
1038
1039     rd_lower_irq(dev, channel->irq);
1040
1041   } else if ((controller->reset_in_progress) &&
1042              (!controller->control.reset)) {
1043     uint_t id;
1044     // Clear BSY and DRDY
1045     PrintDebug("\t\tReset complete {%s}\n", device_type_to_str(get_selected_drive(channel)->device_type));
1046
1047     for (id = 0; id < 2; id++) {
1048       struct controller_t * ctrl = NULL;
1049       struct drive_t * drv = NULL;
1050
1051       if (id == 0) {
1052         ctrl = &(master_drive->controller);
1053         drv = master_drive;
1054       } else if (id == 1) {
1055         ctrl = &(slave_drive->controller);
1056         drv = slave_drive;
1057       }
1058
1059       ctrl->status.busy           = 0;
1060       ctrl->status.drive_ready    = 1;
1061       ctrl->reset_in_progress     = 0;
1062
1063       // Device signature
1064       if (drv->device_type == IDE_DISK) {
1065         PrintDebug("\t\tdrive %d/%d is harddrive\n", get_channel_no(ramdisk, channel), id);
1066         ctrl->head_no        = 0;
1067         ctrl->sector_count   = 1;
1068         ctrl->sector_no      = 1;
1069         ctrl->cylinder_no    = 0;
1070       } else {
1071         ctrl->head_no        = 0;
1072         ctrl->sector_count   = 1;
1073         ctrl->sector_no      = 1;
1074         ctrl->cylinder_no    = 0xeb14;
1075       }
1076     }
1077   }
1078
1079   PrintDebug("\t\ts[0].controller.control.disable_irq = %02x\n",
1080              master_drive->controller.control.disable_irq);
1081   PrintDebug("\t\ts[1].controller.control.disable_irq = %02x\n",
1082              slave_drive->controller.control.disable_irq);
1083   return length;
1084 }
1085
1086
1087 static int read_general_port(ushort_t port, void * dst, uint_t length, struct vm_device * dev) {
1088   struct ramdisk_t * ramdisk  = (struct ramdisk_t *)(dev->private_data);
1089   struct channel_t * channel = NULL;
1090   struct drive_t * drive = NULL;
1091   struct controller_t * controller = NULL;
1092
1093
1094   if (length != 1) {
1095     PrintError("Invalid Status port read length: %d (port=%d)\n", length, port);
1096     return -1;
1097   }
1098
1099   if (is_primary_port(ramdisk, port)) {
1100     channel = &(ramdisk->channels[0]);
1101   } else if (is_secondary_port(ramdisk, port)) {
1102     channel = &(ramdisk->channels[1]);
1103   } else {
1104     PrintError("Invalid Port: %d\n", port);
1105     return -1;
1106   }
1107
1108   drive = get_selected_drive(channel);
1109   controller = &(drive->controller);
1110
1111
1112   PrintDebug("[read_general_handler] IO read addr at %x, on drive %d/%d, curcmd = %02x\n",
1113              port, get_channel_no(ramdisk, channel),
1114              channel->drive_select,
1115              controller->current_command);
1116
1117
1118   switch (port) {
1119   case PRI_FEATURES_PORT:
1120   case SEC_FEATURES_PORT: // hard disk error register 0x1f1
1121     {
1122       uchar_t val = (drive->device_type == IDE_NONE) ? 0 : controller->error_register;
1123
1124       controller->status.err = 0;
1125
1126       *(uchar_t *)dst = val;
1127       return length;
1128
1129       break;
1130     }
1131
1132   case PRI_SECT_CNT_PORT:
1133   case SEC_SECT_CNT_PORT:  // hard disk sector count / interrupt reason 0x1f2
1134     {
1135       uchar_t val = (drive->device_type == IDE_NONE) ? 0 : controller->sector_count;
1136
1137       *(uchar_t *)dst = val;
1138       return length;
1139
1140       break;
1141     }
1142   case PRI_SECT_ADDR1_PORT:
1143   case SEC_SECT_ADDR1_PORT: // sector number 0x1f3
1144     {
1145       uchar_t val = (drive->device_type == IDE_NONE) ? 0 : controller->sector_no;
1146
1147       *(uchar_t *)dst = val;
1148       return length;
1149
1150       break;
1151     }
1152
1153   case PRI_SECT_ADDR2_PORT:
1154   case SEC_SECT_ADDR2_PORT:  // cylinder low 0x1f4
1155     {
1156       // -- WARNING : On real hardware the controller registers are shared between drives.
1157       // So we must respond even if the select device is not present. Some OS uses this fact
1158       // to detect the disks.... minix2 for example
1159       uchar_t val = (num_drives_on_channel(channel) == 0) ? 0 : (controller->cylinder_no & 0x00ff);
1160
1161       *(uchar_t *)dst = val;
1162       return length;
1163
1164       break;
1165   }
1166
1167   case PRI_SECT_ADDR3_PORT:
1168   case SEC_SECT_ADDR3_PORT: // cylinder high 0x1f5
1169     {
1170       // -- WARNING : On real hardware the controller registers are shared between drives.
1171       // So we must respond even if the select device is not present. Some OS uses this fact
1172       // to detect the disks.... minix2 for example
1173       uchar_t val = (num_drives_on_channel(channel) == 0) ? 0 : (controller->cylinder_no >> 8);
1174
1175       *(uchar_t *)dst = val;
1176       return length;
1177
1178       break;
1179     }
1180   case PRI_DRV_SEL_PORT:
1181   case SEC_DRV_SEL_PORT:  // hard disk drive and head register 0x1f6
1182     {
1183       // b7 Extended data field for ECC
1184       // b6/b5: Used to be sector size.  00=256,01=512,10=1024,11=128
1185       //   Since 512 was always used, bit 6 was taken to mean LBA mode:
1186       //     b6 1=LBA mode, 0=CHS mode
1187       //     b5 1
1188       // b4: DRV
1189       // b3..0 HD3..HD0
1190       uchar_t val = ((1 << 7)                          |
1191                      ((controller->lba_mode > 0) << 6) |
1192                      (1 << 5)                          |            // 01b = 512 sector size
1193                      (channel->drive_select << 4)      |
1194                      (controller->head_no << 0));
1195
1196       *(uchar_t *)dst = val;
1197       return length;
1198
1199       break;
1200     }
1201  case PRI_ADDR_REG_PORT:
1202  case SEC_ADDR_REG_PORT: // Hard Disk Address Register 0x3f7
1203    {
1204      // Obsolete and unsupported register.  Not driven by hard
1205      // disk controller.  Report all 1's.  If floppy controller
1206      // is handling this address, it will call this function
1207      // set/clear D7 (the only bit it handles), then return
1208      // the combined value
1209      *(uchar_t *)dst = 0xff;
1210      return length;
1211     }
1212
1213   default:
1214     PrintError("Invalid Port: %d\n", port);
1215     return -1;
1216   }
1217 }
1218
1219
1220
1221
1222 static int write_general_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
1223   struct ramdisk_t * ramdisk  = (struct ramdisk_t *)(dev->private_data);
1224   struct channel_t * channel = NULL;
1225   struct drive_t * drive = NULL;
1226   struct controller_t * controller = NULL;
1227   uchar_t value = *(uchar_t *)src;
1228
1229   if (length != 1) {
1230     PrintError("Invalid Status port read length: %d (port=%d)\n", length, port);
1231     return -1;
1232   }
1233
1234   if (is_primary_port(ramdisk, port)) {
1235     channel = &(ramdisk->channels[0]);
1236   } else if (is_secondary_port(ramdisk, port)) {
1237     channel = &(ramdisk->channels[1]);
1238   } else {
1239     PrintError("Invalid Port: %d\n", port);
1240     return -1;
1241   }
1242
1243   drive = get_selected_drive(channel);
1244   controller = &(drive->controller);
1245
1246
1247   PrintDebug("[write_general_handler] IO write to port %x (val=0x%02x), channel = %d\n",
1248              port,  value, get_channel_no(ramdisk, channel));
1249
1250   switch (port) {
1251
1252   case PRI_FEATURES_PORT:
1253   case SEC_FEATURES_PORT: // hard disk write precompensation 0x1f1
1254     {
1255       write_features(channel, value);
1256       break;
1257     }
1258   case PRI_SECT_CNT_PORT:
1259   case SEC_SECT_CNT_PORT: // hard disk sector count 0x1f2
1260     {
1261       write_sector_count(channel, value);
1262       break;
1263     }
1264   case PRI_SECT_ADDR1_PORT:
1265   case SEC_SECT_ADDR1_PORT: // hard disk sector number 0x1f3
1266     {
1267       write_sector_number(channel, value);
1268       break;
1269     }
1270   case PRI_SECT_ADDR2_PORT:
1271   case SEC_SECT_ADDR2_PORT: // hard disk cylinder low 0x1f4
1272     {
1273       write_cylinder_low(channel, value);
1274       break;
1275     }
1276   case PRI_SECT_ADDR3_PORT:
1277   case SEC_SECT_ADDR3_PORT: // hard disk cylinder high 0x1f5
1278     {
1279       write_cylinder_high(channel, value);
1280       break;
1281     }
1282   case PRI_DRV_SEL_PORT:
1283   case SEC_DRV_SEL_PORT: // hard disk drive and head register 0x1f6
1284     {
1285       // b7 Extended data field for ECC
1286       // b6/b5: Used to be sector size.  00=256,01=512,10=1024,11=128
1287       //   Since 512 was always used, bit 6 was taken to mean LBA mode:
1288       //     b6 1=LBA mode, 0=CHS mode
1289       //     b5 1
1290       // b4: DRV
1291       // b3..0 HD3..HD0
1292
1293       // 1x1xxxxx
1294
1295       PrintDebug("\tDrive Select value=%x\n", value);
1296
1297       if ((value & 0xa0) != 0xa0) {
1298         PrintDebug("\t\tIO write 0x%x (%02x): not 1x1xxxxxb\n", port, (unsigned) value);
1299       }
1300
1301       write_head_no(channel, value & 0xf);
1302       if ((controller->lba_mode == 0) && (((value >> 6) & 1) == 1)) {
1303         PrintDebug("\t\tenabling LBA mode\n");
1304       }
1305
1306       write_lba_mode(channel, (value >> 6) & 1);
1307
1308
1309
1310       if (drive->cdrom.cd) {
1311         PrintDebug("\t\tSetting LBA on CDROM: %d\n", (value >> 6) & 1);
1312         drive->cdrom.cd->set_LBA(drive->private_data, (value >> 6) & 1);
1313       }
1314
1315
1316       channel->drive_select = (value >> 4) & 0x01;
1317       drive = get_selected_drive(channel);
1318
1319       if (drive->device_type == IDE_NONE) {
1320         PrintDebug("\t\tError: device set to %d which does not exist! channel = 0x%x\n",
1321                    channel->drive_select, get_channel_no(ramdisk, channel));
1322
1323         controller->error_register = 0x04; // aborted
1324         controller->status.err = 1;
1325       }
1326
1327       break;
1328     }
1329   default:
1330     PrintError("\t\thard drive: io write to unhandled port 0x%x  (value = %c)\n", port, value);
1331     //return -1;
1332   }
1333
1334   return length;
1335 }
1336
1337
1338
1339
1340
1341 static void rd_raise_interrupt(struct vm_device * dev, struct channel_t * channel) {
1342   Bit32u irq;
1343   //  struct ramdisk_t * ramdisk = (struct ramdisk_t *)(dev->private_data);
1344   struct drive_t * drive = get_selected_drive(channel);
1345   struct controller_t * controller = &(drive->controller);
1346
1347   PrintDebug("[raise_interrupt] disable_irq = %02x\n", controller->control.disable_irq);
1348
1349   if (!(controller->control.disable_irq)) {
1350     irq = channel->irq;
1351
1352     PrintDebug("\t\tRaising interrupt %d {%s}\n\n", irq, device_type_to_str(drive->device_type));
1353
1354     dev->vm->vm_ops.raise_irq(dev->vm, irq);
1355   } else {
1356     PrintDebug("\t\tirq is disabled\n");
1357   }
1358
1359   return;
1360 }
1361
1362 static void rd_lower_irq(struct vm_device *dev, Bit32u irq)  // __attribute__(regparm(1))
1363 {
1364   PrintDebug("[lower_irq] irq = %d\n", irq);
1365   dev->vm->vm_ops.lower_irq(dev->vm, irq);
1366 }
1367
1368
1369
1370
1371
1372
1373
1374 //////////////////////////////////////////////////////////////////////////
1375
1376 /*
1377  * ATAPI subroutines
1378  */
1379
1380
1381
1382 int handle_atapi_packet_command(struct vm_device * dev, struct channel_t * channel, ushort_t value) {
1383   struct ramdisk_t * ramdisk  = (struct ramdisk_t *)(dev->private_data);
1384   struct drive_t * drive = get_selected_drive(channel);
1385   struct controller_t * controller = &(drive->controller);
1386
1387   if (controller->buffer_index >= PACKET_SIZE) {
1388     PrintError("ATAPI packet exceeded maximum length: buffer_index (%d) >= PACKET_SIZE\n",
1389                controller->buffer_index);
1390     return -1;
1391   }
1392
1393   controller->buffer[controller->buffer_index] = value;
1394   controller->buffer[controller->buffer_index + 1] = (value >> 8);
1395   controller->buffer_index += 2;
1396
1397
1398   /* if packet completely writtten */
1399   if (controller->buffer_index >= PACKET_SIZE) {
1400     // complete command received
1401     Bit8u atapi_command = controller->buffer[0];
1402
1403     PrintDebug("\t\tcdrom: ATAPI command 0x%x started\n", atapi_command);
1404
1405     switch (atapi_command) {
1406     case 0x00: // test unit ready
1407       {
1408         if (drive->cdrom.ready) {
1409           rd_atapi_cmd_nop(dev, channel);
1410         } else {
1411           rd_atapi_cmd_error(dev, channel, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1412         }
1413
1414         rd_raise_interrupt(dev, channel);
1415
1416         break;
1417       }
1418     case 0x03:  // request sense
1419       {
1420         int alloc_length = controller->buffer[4];
1421
1422         if (rd_init_send_atapi_command(dev, channel, atapi_command, 18, alloc_length, false) == -1) {
1423           return -1;
1424         }
1425
1426         // sense data
1427         controller->buffer[0] = 0x70 | (1 << 7);
1428         controller->buffer[1] = 0;
1429         controller->buffer[2] = drive->sense.sense_key;
1430         controller->buffer[3] = drive->sense.information.arr[0];
1431         controller->buffer[4] = drive->sense.information.arr[1];
1432         controller->buffer[5] = drive->sense.information.arr[2];
1433         controller->buffer[6] = drive->sense.information.arr[3];
1434         controller->buffer[7] = 17 - 7;
1435         controller->buffer[8] = drive->sense.specific_inf.arr[0];
1436         controller->buffer[9] = drive->sense.specific_inf.arr[1];
1437         controller->buffer[10] = drive->sense.specific_inf.arr[2];
1438         controller->buffer[11] = drive->sense.specific_inf.arr[3];
1439         controller->buffer[12] = drive->sense.asc;
1440         controller->buffer[13] = drive->sense.ascq;
1441         controller->buffer[14] = drive->sense.fruc;
1442         controller->buffer[15] = drive->sense.key_spec.arr[0];
1443         controller->buffer[16] = drive->sense.key_spec.arr[1];
1444         controller->buffer[17] = drive->sense.key_spec.arr[2];
1445
1446         rd_ready_to_send_atapi(dev, channel);
1447         break;
1448       }
1449     case 0x1b:  // start stop unit
1450       {
1451         //bx_bool Immed = (controller->buffer[1] >> 0) & 1;
1452         rd_bool LoEj = (controller->buffer[4] >> 1) & 1;
1453         rd_bool Start = (controller->buffer[4] >> 0) & 1;
1454
1455         // stop the disc
1456         if ((!LoEj) && (!Start)) {
1457           PrintError("FIXME: Stop disc not implemented\n");
1458
1459           rd_atapi_cmd_nop(dev, channel);
1460           rd_raise_interrupt(dev, channel);
1461         } else if (!LoEj && Start) { // start (spin up) the disc
1462
1463           drive->cdrom.cd->start_cdrom(drive->private_data);
1464
1465           PrintError("FIXME: ATAPI start disc not reading TOC\n");
1466           rd_atapi_cmd_nop(dev, channel);
1467           rd_raise_interrupt(dev, channel);
1468         } else if (LoEj && !Start) { // Eject the disc
1469           rd_atapi_cmd_nop(dev, channel);
1470
1471           if (drive->cdrom.ready) {
1472
1473             drive->cdrom.cd->eject_cdrom(drive->private_data);
1474
1475             drive->cdrom.ready = 0;
1476             //bx_options.atadevice[channel][SLAVE_SELECTED(channel)].Ostatus->set(EJECTED);
1477             //bx_gui->update_drive_status_buttons();
1478           }
1479           rd_raise_interrupt(dev, channel);
1480         } else { // Load the disc
1481           // My guess is that this command only closes the tray, that's a no-op for us
1482           rd_atapi_cmd_nop(dev, channel);
1483           rd_raise_interrupt(dev, channel);
1484         }
1485         break;
1486       }
1487     case 0xbd: // mechanism status
1488       {
1489         uint16_t alloc_length = rd_read_16bit(controller->buffer + 8);
1490
1491         if (alloc_length == 0) {
1492           PrintError("Zero allocation length to MECHANISM STATUS not impl.\n");
1493           return -1;
1494         }
1495
1496         if (rd_init_send_atapi_command(dev, channel, atapi_command, 8, alloc_length, false) == -1) {
1497           return -1;
1498         }
1499
1500         controller->buffer[0] = 0; // reserved for non changers
1501         controller->buffer[1] = 0; // reserved for non changers
1502
1503         controller->buffer[2] = 0; // Current LBA (TODO!)
1504         controller->buffer[3] = 0; // Current LBA (TODO!)
1505         controller->buffer[4] = 0; // Current LBA (TODO!)
1506
1507         controller->buffer[5] = 1; // one slot
1508
1509         controller->buffer[6] = 0; // slot table length
1510         controller->buffer[7] = 0; // slot table length
1511
1512         rd_ready_to_send_atapi(dev, channel);
1513         break;
1514       }
1515     case 0x5a:  // mode sense
1516       {
1517         uint16_t alloc_length = rd_read_16bit(controller->buffer + 7);
1518
1519         Bit8u PC = controller->buffer[2] >> 6;
1520         Bit8u PageCode = controller->buffer[2] & 0x3f;
1521
1522         switch (PC) {
1523         case 0x0: // current values
1524           {
1525             switch (PageCode) {
1526             case 0x01: // error recovery
1527               {
1528
1529                 if (rd_init_send_atapi_command(dev, channel, atapi_command, sizeof(struct error_recovery_t) + 8, alloc_length, false) == -1) {
1530                   return -1;
1531                 }
1532
1533                 rd_init_mode_sense_single(dev, channel, &(drive->cdrom.current.error_recovery),
1534                                           sizeof(struct error_recovery_t));
1535                 rd_ready_to_send_atapi(dev, channel);
1536                 break;
1537               }
1538             case 0x2a: // CD-ROM capabilities & mech. status
1539               {
1540
1541                 if (rd_init_send_atapi_command(dev, channel, atapi_command, 28, alloc_length, false) == -1) {
1542                   return -1;
1543                 }
1544
1545                 rd_init_mode_sense_single(dev, channel, &(controller->buffer[8]), 28);
1546
1547                 controller->buffer[8] = 0x2a;
1548                 controller->buffer[9] = 0x12;
1549                 controller->buffer[10] = 0x00;
1550                 controller->buffer[11] = 0x00;
1551                 // Multisession, Mode 2 Form 2, Mode 2 Form 1
1552                 controller->buffer[12] = 0x70;
1553                 controller->buffer[13] = (3 << 5);
1554                 controller->buffer[14] = (unsigned char) (1 |
1555                                                           (drive->cdrom.locked ? (1 << 1) : 0) |
1556                                                           (1 << 3) |
1557                                                           (1 << 5));
1558                 controller->buffer[15] = 0x00;
1559                 controller->buffer[16] = (706 >> 8) & 0xff;
1560                 controller->buffer[17] = 706 & 0xff;
1561                 controller->buffer[18] = 0;
1562                 controller->buffer[19] = 2;
1563                 controller->buffer[20] = (512 >> 8) & 0xff;
1564                 controller->buffer[21] = 512 & 0xff;
1565                 controller->buffer[22] = (706 >> 8) & 0xff;
1566                 controller->buffer[23] = 706 & 0xff;
1567                 controller->buffer[24] = 0;
1568                 controller->buffer[25] = 0;
1569                 controller->buffer[26] = 0;
1570                 controller->buffer[27] = 0;
1571                 rd_ready_to_send_atapi(dev, channel);
1572                 break;
1573               }
1574             case 0x0d: // CD-ROM
1575             case 0x0e: // CD-ROM audio control
1576             case 0x3f: // all
1577               {
1578                 PrintError("Ramdisk: cdrom: MODE SENSE (curr), code=%x not implemented yet\n",
1579                          PageCode);
1580                 rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST,
1581                                    ASC_INV_FIELD_IN_CMD_PACKET);
1582                 rd_raise_interrupt(dev, channel);
1583                 break;
1584               }
1585             default:
1586               {
1587                 // not implemeted by this device
1588                 PrintDebug("\t\tcdrom: MODE SENSE PC=%x, PageCode=%x, not implemented by device\n",
1589                               PC, PageCode);
1590                 rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST,
1591                                    ASC_INV_FIELD_IN_CMD_PACKET);
1592                 rd_raise_interrupt(dev, channel);
1593                 break;
1594               }
1595             }
1596             break;
1597           }
1598         case 0x1: // changeable values
1599           {
1600             switch (PageCode) {
1601             case 0x01: // error recovery
1602             case 0x0d: // CD-ROM
1603             case 0x0e: // CD-ROM audio control
1604             case 0x2a: // CD-ROM capabilities & mech. status
1605             case 0x3f: // all
1606               {
1607                 PrintError("cdrom: MODE SENSE (chg), code=%x not implemented yet\n",
1608                            PageCode);
1609                 rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST,
1610                                    ASC_INV_FIELD_IN_CMD_PACKET);
1611                 rd_raise_interrupt(dev, channel);
1612                 break;
1613               }
1614             default:
1615               {
1616                 // not implemeted by this device
1617                 PrintDebug("\t\tcdrom: MODE SENSE PC=%x, PageCode=%x, not implemented by device\n",
1618                            PC, PageCode);
1619                 rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST,
1620                                    ASC_INV_FIELD_IN_CMD_PACKET);
1621                 rd_raise_interrupt(dev, channel);
1622                 break;
1623               }
1624             }
1625             break;
1626           }
1627         case 0x2: // default values
1628           {
1629             switch (PageCode) {
1630             case 0x01: // error recovery
1631             case 0x0d: // CD-ROM
1632             case 0x0e: // CD-ROM audio control
1633             case 0x2a: // CD-ROM capabilities & mech. status
1634             case 0x3f: // all
1635               PrintError("cdrom: MODE SENSE (dflt), code=%x\n",
1636                        PageCode);
1637               return -1;
1638
1639             default:
1640               {
1641                 // not implemeted by this device
1642                 PrintDebug("\t\tcdrom: MODE SENSE PC=%x, PageCode=%x, not implemented by device\n",
1643                               PC, PageCode);
1644                 rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST,
1645                                    ASC_INV_FIELD_IN_CMD_PACKET);
1646                 rd_raise_interrupt(dev, channel);
1647                 break;
1648               }
1649             }
1650             break;
1651           }
1652         case 0x3: // saved values not implemented
1653           {
1654             rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST, ASC_SAVING_PARAMETERS_NOT_SUPPORTED);
1655             rd_raise_interrupt(dev, channel);
1656             break;
1657           }
1658         default:
1659           {
1660             PrintError("Should not get here!\n");
1661             return -1;
1662             break;
1663           }
1664         }
1665         break;
1666       }
1667     case 0x12: // inquiry
1668       {
1669         uint8_t alloc_length = controller->buffer[4];
1670
1671         if (rd_init_send_atapi_command(dev, channel, atapi_command, 36, alloc_length, false) == -1) {
1672           return -1;
1673         }
1674
1675         controller->buffer[0] = 0x05; // CD-ROM
1676         controller->buffer[1] = 0x80; // Removable
1677         controller->buffer[2] = 0x00; // ISO, ECMA, ANSI version
1678         controller->buffer[3] = 0x21; // ATAPI-2, as specified
1679         controller->buffer[4] = 31; // additional length (total 36)
1680         controller->buffer[5] = 0x00; // reserved
1681         controller->buffer[6] = 0x00; // reserved
1682         controller->buffer[7] = 0x00; // reserved
1683
1684         // Vendor ID
1685         const char* vendor_id = "VTAB    ";
1686         int i;
1687         for (i = 0; i < 8; i++) {
1688           controller->buffer[8+i] = vendor_id[i];
1689         }
1690
1691         // Product ID
1692         const char* product_id = "Turbo CD-ROM    ";
1693         for (i = 0; i < 16; i++) {
1694           controller->buffer[16+i] = product_id[i];
1695         }
1696
1697         // Product Revision level
1698         const char* rev_level = "1.0 ";
1699         for (i = 0; i < 4; i++) {
1700           controller->buffer[32 + i] = rev_level[i];
1701         }
1702
1703         rd_ready_to_send_atapi(dev, channel);
1704         break;
1705       }
1706     case 0x25:  // read cd-rom capacity
1707       {
1708         // no allocation length???
1709         if (rd_init_send_atapi_command(dev, channel, atapi_command, 8, 8, false) == -1) {
1710           return -1;
1711         }
1712
1713         if (drive->cdrom.ready) {
1714           uint32_t capacity = drive->cdrom.capacity;
1715
1716           PrintDebug("\t\tCapacity is %d sectors (%d bytes)\n", capacity, capacity * 2048);
1717
1718           controller->buffer[0] = (capacity >> 24) & 0xff;
1719           controller->buffer[1] = (capacity >> 16) & 0xff;
1720           controller->buffer[2] = (capacity >> 8) & 0xff;
1721           controller->buffer[3] = (capacity >> 0) & 0xff;
1722           controller->buffer[4] = (2048 >> 24) & 0xff;
1723           controller->buffer[5] = (2048 >> 16) & 0xff;
1724           controller->buffer[6] = (2048 >> 8) & 0xff;
1725           controller->buffer[7] = (2048 >> 0) & 0xff;
1726
1727           rd_ready_to_send_atapi(dev, channel);
1728         } else {
1729           rd_atapi_cmd_error(dev, channel, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1730           rd_raise_interrupt(dev, channel);
1731         }
1732         break;
1733       }
1734
1735
1736     case 0xbe:  // read cd
1737       {
1738         if (drive->cdrom.ready) {
1739           PrintError("Read CD with CD present not implemented\n");
1740           rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET);
1741           rd_raise_interrupt(dev, channel);
1742         } else {
1743           rd_atapi_cmd_error(dev, channel, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1744           rd_raise_interrupt(dev, channel);
1745         }
1746         break;
1747       }
1748     case 0x43: // read toc
1749       {
1750         if (drive->cdrom.ready) {
1751           int toc_length;
1752           bool msf = (controller->buffer[1] >> 1) & 1;
1753           uint8_t starting_track = controller->buffer[6];
1754
1755           uint16_t alloc_length = rd_read_16bit(controller->buffer + 7);
1756
1757           uint8_t format = (controller->buffer[9] >> 6);
1758           int i;
1759           switch (format) {
1760           case 0:
1761
1762             if (!(drive->cdrom.cd->read_toc(drive->private_data, controller->buffer,
1763                                             &toc_length, msf, starting_track))) {
1764               PrintDebug("CDROM: Reading Table of Contents Failed\n");
1765               rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST,
1766                                  ASC_INV_FIELD_IN_CMD_PACKET);
1767               rd_raise_interrupt(dev, channel);
1768             } else {
1769               if (rd_init_send_atapi_command(dev, channel, atapi_command, toc_length, alloc_length, false) == -1) {
1770                 return -1;
1771               }
1772               rd_ready_to_send_atapi(dev, channel);
1773             }
1774             break;
1775
1776           case 1:
1777             // multi session stuff. we ignore this and emulate a single session only
1778             if (rd_init_send_atapi_command(dev, channel, atapi_command, 12, alloc_length, false) == -1) {
1779               return -1;
1780             }
1781
1782             controller->buffer[0] = 0;
1783             controller->buffer[1] = 0x0a;
1784             controller->buffer[2] = 1;
1785             controller->buffer[3] = 1;
1786
1787             for (i = 0; i < 8; i++) {
1788               controller->buffer[4 + i] = 0;
1789             }
1790
1791             rd_ready_to_send_atapi(dev, channel);
1792             break;
1793
1794           case 2:
1795           default:
1796             PrintError("(READ TOC) Format %d not supported\n", format);
1797             return -1;
1798           }
1799         } else {
1800           rd_atapi_cmd_error(dev, channel, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1801           rd_raise_interrupt(dev, channel);
1802         }
1803         break;
1804       }
1805     case 0x28: // read (10)
1806     case 0xa8: // read (12)
1807       {
1808
1809         uint32_t transfer_length;
1810         if (atapi_command == 0x28) {
1811           transfer_length = rd_read_16bit(controller->buffer + 7);
1812         } else {
1813           transfer_length = rd_read_32bit(controller->buffer + 6);
1814         }
1815
1816         uint32_t lba = rd_read_32bit(controller->buffer + 2);
1817
1818         if (!(drive->cdrom.ready)) {
1819           PrintError("CDROM Error: Not Ready (ATA%d/%d)\n",
1820                      get_channel_no(ramdisk, channel), get_drive_no(channel, drive));
1821           rd_atapi_cmd_error(dev, channel, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1822           rd_raise_interrupt(dev, channel);
1823           break;
1824         }
1825
1826         if (transfer_length == 0) {
1827           rd_atapi_cmd_nop(dev, channel);
1828           rd_raise_interrupt(dev, channel);
1829           PrintError("READ(%d) with transfer length 0, ok\n",
1830                      (atapi_command == 0x28) ? 10 : 12);
1831           break;
1832         }
1833
1834         if (lba + transfer_length > drive->cdrom.capacity) {
1835           PrintError("CDROM Error: Capacity exceeded [capacity=%d] (ATA%d/%d)\n",
1836                      drive->cdrom.capacity,
1837                      get_channel_no(ramdisk, channel), get_drive_no(channel, drive));
1838           rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR);
1839           rd_raise_interrupt(dev, channel);
1840           break;
1841         }
1842
1843         PrintDebug("\t\tcdrom: READ (%d) LBA=%d LEN=%d\n",
1844                    (atapi_command == 0x28) ? 10 : 12,
1845                    lba, transfer_length);
1846
1847         // handle command
1848         if (rd_init_send_atapi_command(dev, channel, atapi_command, transfer_length * 2048,
1849                                        transfer_length * 2048, true) == -1) {
1850           PrintError("CDROM Error: Atapi command send error\n");
1851           return -1;
1852         }
1853
1854         drive->cdrom.remaining_blocks = transfer_length;
1855         drive->cdrom.next_lba = lba;
1856         rd_ready_to_send_atapi(dev, channel);
1857         break;
1858       }
1859     case 0x2b:  // seek
1860       {
1861         uint32_t lba = rd_read_32bit(controller->buffer + 2);
1862
1863         if (!(drive->cdrom.ready)) {
1864           rd_atapi_cmd_error(dev, channel, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1865           rd_raise_interrupt(dev, channel);
1866           break;
1867         }
1868
1869         if (lba > drive->cdrom.capacity) {
1870           rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR);
1871           rd_raise_interrupt(dev, channel);
1872           break;
1873         }
1874
1875         PrintDebug("\t\tcdrom: SEEK (ignored)\n");
1876
1877         rd_atapi_cmd_nop(dev, channel);
1878         rd_raise_interrupt(dev, channel);
1879
1880         break;
1881       }
1882     case 0x1e:  // prevent/allow medium removal
1883       {
1884
1885         if (drive->cdrom.ready) {
1886           drive->cdrom.locked = controller->buffer[4] & 1;
1887           rd_atapi_cmd_nop(dev, channel);
1888         } else {
1889           rd_atapi_cmd_error(dev, channel, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1890         }
1891
1892         rd_raise_interrupt(dev, channel);
1893
1894         break;
1895       }
1896     case 0x42:  // read sub-channel
1897       {
1898         //bool msf = get_packet_field(channel,1, 1, 1);
1899         bool sub_q = get_packet_field(channel,2, 6, 1);
1900         //uint8_t data_format = get_packet_byte(channel,3);
1901         //uint8_t track_number = get_packet_byte(channel,6);
1902         uint16_t alloc_length = get_packet_word(channel,7);
1903
1904
1905         /*
1906           UNUSED(msf);
1907           UNUSED(data_format);
1908           UNUSED(track_number);
1909         */
1910         if (!(drive->cdrom.ready)) {
1911           rd_atapi_cmd_error(dev, channel, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1912           rd_raise_interrupt(dev, channel);
1913         } else {
1914           controller->buffer[0] = 0;
1915           controller->buffer[1] = 0; // audio not supported
1916           controller->buffer[2] = 0;
1917           controller->buffer[3] = 0;
1918
1919           int ret_len = 4; // header size
1920
1921           if (sub_q) { // !sub_q == header only
1922             PrintError("Read sub-channel with SubQ not implemented\n");
1923             rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST,
1924                                ASC_INV_FIELD_IN_CMD_PACKET);
1925             rd_raise_interrupt(dev, channel);
1926           }
1927
1928           if (rd_init_send_atapi_command(dev, channel, atapi_command, ret_len, alloc_length, false) == -1) {
1929             return -1;
1930           }
1931           rd_ready_to_send_atapi(dev, channel);
1932         }
1933         break;
1934       }
1935     case 0x51:  // read disc info
1936       {
1937         // no-op to keep the Linux CD-ROM driver happy
1938         rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET);
1939         rd_raise_interrupt(dev, channel);
1940         break;
1941       }
1942     case 0x55: // mode select
1943     case 0xa6: // load/unload cd
1944     case 0x4b: // pause/resume
1945     case 0x45: // play audio
1946     case 0x47: // play audio msf
1947     case 0xbc: // play cd
1948     case 0xb9: // read cd msf
1949     case 0x44: // read header
1950     case 0xba: // scan
1951     case 0xbb: // set cd speed
1952     case 0x4e: // stop play/scan
1953     case 0x46: // ???
1954     case 0x4a: // ???
1955       PrintError("ATAPI command 0x%x not implemented yet\n",
1956                atapi_command);
1957       rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET);
1958       rd_raise_interrupt(dev, channel);
1959       break;
1960     default:
1961       PrintError("Unknown ATAPI command 0x%x (%d)\n",
1962                  atapi_command, atapi_command);
1963       // We'd better signal the error if the user chose to continue
1964       rd_atapi_cmd_error(dev, channel, SENSE_ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET);
1965       rd_raise_interrupt(dev, channel);
1966       break;
1967     }
1968   }
1969   return 0;
1970 }
1971
1972
1973
1974
1975 int rd_init_send_atapi_command(struct vm_device * dev, struct channel_t * channel, Bit8u command, int req_length, int alloc_length, bool lazy)
1976 {
1977   struct drive_t * drive = &(channel->drives[channel->drive_select]);
1978   struct controller_t * controller = &(drive->controller);
1979
1980   // controller->byte_count is a union of controller->cylinder_no;
1981   // lazy is used to force a data read in the buffer at the next read.
1982
1983   PrintDebug("[rd_init_send_atapi_cmd]\n");
1984
1985   if (controller->byte_count == 0xffff) {
1986     controller->byte_count = 0xfffe;
1987   }
1988
1989   if ((controller->byte_count & 1) &&
1990       !(alloc_length <= controller->byte_count)) {
1991
1992     PrintDebug("\t\tOdd byte count (0x%04x) to ATAPI command 0x%02x, using 0x%x\n",
1993                   controller->byte_count,
1994                   command,
1995                   controller->byte_count - 1);
1996
1997     controller->byte_count -= 1;
1998   }
1999
2000   if (controller->byte_count == 0) {
2001     PrintError("\t\tATAPI command with zero byte count\n");
2002     return -1;
2003   }
2004
2005   if (alloc_length < 0) {
2006     PrintError("\t\tAllocation length < 0\n");
2007     return -1;
2008   }
2009
2010   if (alloc_length == 0) {
2011     alloc_length = controller->byte_count;
2012   }
2013
2014   controller->interrupt_reason.i_o = 1;
2015   controller->interrupt_reason.c_d = 0;
2016   controller->status.busy = 0;
2017   controller->status.drq = 1;
2018   controller->status.err = 0;
2019
2020   // no bytes transfered yet
2021   if (lazy) {
2022     controller->buffer_index = 2048;
2023   } else {
2024     controller->buffer_index = 0;
2025   }
2026
2027   controller->drq_index = 0;
2028
2029   if (controller->byte_count > req_length) {
2030     controller->byte_count = req_length;
2031   }
2032
2033   if (controller->byte_count > alloc_length) {
2034     controller->byte_count = alloc_length;
2035   }
2036
2037   drive->atapi.command = command;
2038   drive->atapi.drq_bytes = controller->byte_count;
2039   drive->atapi.total_bytes_remaining = (req_length < alloc_length) ? req_length : alloc_length;
2040
2041   // if (lazy) {
2042   // // bias drq_bytes and total_bytes_remaining
2043   // SELECTED_DRIVE(channel).atapi.drq_bytes += 2048;
2044   // SELECTED_DRIVE(channel).atapi.total_bytes_remaining += 2048;
2045   // }
2046
2047   return 0;
2048 }
2049
2050
2051
2052  void rd_ready_to_send_atapi(struct vm_device * dev, struct channel_t * channel) {
2053   PrintDebug("[rd_ready_to_send_atapi]\n");
2054
2055   rd_raise_interrupt(dev, channel);
2056 }
2057
2058
2059
2060
2061
2062 void rd_atapi_cmd_error(struct vm_device * dev, struct channel_t * channel, sense_t sense_key, asc_t asc)
2063 {
2064   struct drive_t * drive = &(channel->drives[channel->drive_select]);
2065   struct controller_t * controller = &(drive->controller);
2066
2067 #ifdef DEBUG_RAMDISK
2068   {
2069     struct ramdisk_t *ramdisk = (struct ramdisk_t *)(dev->private_data);
2070     PrintDebug("[rd_atapi_cmd_error]\n");
2071     PrintDebug("Error: atapi_cmd_error channel=%02x key=%02x asc=%02x\n",
2072                get_channel_no(ramdisk, channel), sense_key, asc);
2073   }
2074 #endif
2075
2076   controller->error_register = sense_key << 4;
2077   controller->interrupt_reason.i_o = 1;
2078   controller->interrupt_reason.c_d = 1;
2079   controller->interrupt_reason.rel = 0;
2080   controller->status.busy = 0;
2081   controller->status.drive_ready = 1;
2082   controller->status.write_fault = 0;
2083   controller->status.drq = 0;
2084   controller->status.err = 1;
2085
2086   drive->sense.sense_key = sense_key;
2087   drive->sense.asc = asc;
2088   drive->sense.ascq = 0;
2089 }
2090
2091
2092
2093 void rd_atapi_cmd_nop(struct vm_device * dev, struct channel_t * channel)
2094 {
2095   struct drive_t * drive = &(channel->drives[channel->drive_select]);
2096   struct controller_t * controller = &(drive->controller);
2097
2098   PrintDebug("[rd_atapi_cmd_nop]\n");
2099   controller->interrupt_reason.i_o = 1;
2100   controller->interrupt_reason.c_d = 1;
2101   controller->interrupt_reason.rel = 0;
2102   controller->status.busy = 0;
2103   controller->status.drive_ready = 1;
2104   controller->status.drq = 0;
2105   controller->status.err = 0;
2106 }
2107
2108
2109
2110
2111 void rd_identify_ATAPI_drive(struct vm_device * dev, struct channel_t * channel)
2112 {
2113   struct drive_t * drive = &(channel->drives[channel->drive_select]);
2114   struct controller_t * controller = &(drive->controller);
2115
2116
2117   uint_t i;
2118   const char* serial_number = " VT00001\0\0\0\0\0\0\0\0\0\0\0\0";
2119   const char* firmware = "ALPHA1  ";
2120
2121   drive->id_drive[0] = (2 << 14) | (5 << 8) | (1 << 7) | (2 << 5) | (0 << 0); // Removable CDROM, 50us response, 12 byte packets
2122
2123   for (i = 1; i <= 9; i++) {
2124     drive->id_drive[i] = 0;
2125   }
2126
2127   for (i = 0; i < 10; i++) {
2128     drive->id_drive[10 + i] = ((serial_number[i * 2] << 8) |
2129                                (serial_number[(i * 2) + 1]));
2130   }
2131
2132   for (i = 20; i <= 22; i++) {
2133     drive->id_drive[i] = 0;
2134   }
2135
2136   for (i = 0; i < strlen(firmware)/2; i++) {
2137     drive->id_drive[23 + i] = ((firmware[i * 2] << 8) |
2138                                (firmware[(i * 2) + 1]));
2139   }
2140   V3_ASSERT((23 + i) == 27);
2141
2142   for (i = 0; i < strlen((char *)(drive->model_no)) / 2; i++) {
2143     drive->id_drive[27 + i] = ((drive->model_no[i * 2] << 8) |
2144                                (drive->model_no[(i * 2) + 1]));
2145   }
2146   V3_ASSERT((27 + i) == 47);
2147
2148   drive->id_drive[47] = 0;
2149   drive->id_drive[48] = 1; // 32 bits access
2150
2151   drive->id_drive[49] = (1 << 9); // LBA supported
2152
2153   drive->id_drive[50] = 0;
2154   drive->id_drive[51] = 0;
2155   drive->id_drive[52] = 0;
2156
2157   drive->id_drive[53] = 3; // words 64-70, 54-58 valid
2158
2159   for (i = 54; i <= 62; i++) {
2160     drive->id_drive[i] = 0;
2161   }
2162
2163   // copied from CFA540A
2164   drive->id_drive[63] = 0x0103; // variable (DMA stuff)
2165   drive->id_drive[64] = 0x0001; // PIO
2166   drive->id_drive[65] = 0x00b4;
2167   drive->id_drive[66] = 0x00b4;
2168   drive->id_drive[67] = 0x012c;
2169   drive->id_drive[68] = 0x00b4;
2170
2171   drive->id_drive[69] = 0;
2172   drive->id_drive[70] = 0;
2173   drive->id_drive[71] = 30; // faked
2174   drive->id_drive[72] = 30; // faked
2175   drive->id_drive[73] = 0;
2176   drive->id_drive[74] = 0;
2177
2178   drive->id_drive[75] = 0;
2179
2180   for (i = 76; i <= 79; i++) {
2181     drive->id_drive[i] = 0;
2182   }
2183
2184   drive->id_drive[80] = 0x1e; // supports up to ATA/ATAPI-4
2185   drive->id_drive[81] = 0;
2186   drive->id_drive[82] = 0;
2187   drive->id_drive[83] = 0;
2188   drive->id_drive[84] = 0;
2189   drive->id_drive[85] = 0;
2190   drive->id_drive[86] = 0;
2191   drive->id_drive[87] = 0;
2192   drive->id_drive[88] = 0;
2193
2194   for (i = 89; i <= 126; i++) {
2195     drive->id_drive[i] = 0;
2196   }
2197
2198   drive->id_drive[127] = 0;
2199   drive->id_drive[128] = 0;
2200
2201   for (i = 129; i <= 159; i++) {
2202     drive->id_drive[i] = 0;
2203   }
2204
2205   for (i = 160; i <= 255; i++) {
2206     drive->id_drive[i] = 0;
2207   }
2208
2209   // now convert the id_drive array (native 256 word format) to
2210   // the controller buffer (512 bytes)
2211   Bit16u temp16;
2212   for (i = 0; i <= 255; i++) {
2213     temp16 = drive->id_drive[i];
2214     controller->buffer[i * 2] = temp16 & 0x00ff;
2215     controller->buffer[i * 2 + 1] = temp16 >> 8;
2216   }
2217
2218   return;
2219 }
2220
2221
2222
2223
2224
2225
2226
2227 static
2228 void rd_init_mode_sense_single(struct vm_device * dev,
2229                                struct channel_t * channel, const void* src, int size)
2230 {
2231   struct drive_t * drive = &(channel->drives[channel->drive_select]);
2232   struct controller_t * controller = &(drive->controller);
2233
2234   PrintDebug("[rd_init_mode_sense_single]\n");
2235
2236   // Header
2237   controller->buffer[0] = (size + 6) >> 8;
2238   controller->buffer[1] = (size + 6) & 0xff;
2239   controller->buffer[2] = 0x70; // no media present
2240   controller->buffer[3] = 0; // reserved
2241   controller->buffer[4] = 0; // reserved
2242   controller->buffer[5] = 0; // reserved
2243   controller->buffer[6] = 0; // reserved
2244   controller->buffer[7] = 0; // reserved
2245
2246   // Data
2247   memcpy(controller->buffer + 8, src, size);
2248 }
2249
2250
2251
2252 static void rd_command_aborted(struct vm_device * dev,
2253                                struct channel_t * channel, unsigned value) {
2254   struct drive_t * drive = &(channel->drives[channel->drive_select]);
2255   struct controller_t * controller = &(drive->controller);
2256
2257   PrintDebug("[rd_command_aborted]\n");
2258   PrintDebug("\t\taborting on command 0x%02x {%s}\n", value, device_type_to_str(drive->device_type));
2259
2260   controller->current_command = 0;
2261   controller->status.busy = 0;
2262   controller->status.drive_ready = 1;
2263   controller->status.err = 1;
2264   controller->error_register = 0x04; // command ABORTED
2265   controller->status.drq = 0;
2266   controller->status.seek_complete = 0;
2267   controller->status.corrected_data = 0;
2268   controller->buffer_index = 0;
2269
2270   rd_raise_interrupt(dev, channel);
2271 }
2272
2273
2274 static int ramdisk_init_device(struct vm_device *dev) {
2275   struct ramdisk_t *ramdisk= (struct ramdisk_t *)dev->private_data;
2276
2277   PrintDebug("Initializing Ramdisk\n");
2278
2279
2280   rd_init_hardware(ramdisk);
2281
2282
2283   dev_hook_io(dev, PRI_CTRL_PORT,
2284               &read_status_port, &write_ctrl_port);
2285
2286   dev_hook_io(dev, PRI_DATA_PORT,
2287               &read_data_port, &write_data_port);
2288   dev_hook_io(dev, PRI_FEATURES_PORT,
2289               &read_general_port, &write_general_port);
2290   dev_hook_io(dev, PRI_SECT_CNT_PORT,
2291               &read_general_port, &write_general_port);
2292   dev_hook_io(dev, PRI_SECT_ADDR1_PORT,
2293               &read_general_port, &write_general_port);
2294   dev_hook_io(dev, PRI_SECT_ADDR2_PORT,
2295               &read_general_port, &write_general_port);
2296   dev_hook_io(dev, PRI_SECT_ADDR3_PORT,
2297               &read_general_port, &write_general_port);
2298   dev_hook_io(dev, PRI_DRV_SEL_PORT,
2299               &read_general_port, &write_general_port);
2300   dev_hook_io(dev, PRI_CMD_PORT,
2301               &read_status_port, &write_cmd_port);
2302
2303
2304   dev_hook_io(dev, SEC_CTRL_PORT,
2305               &read_status_port, &write_ctrl_port);
2306
2307   dev_hook_io(dev, SEC_DATA_PORT,
2308               &read_data_port, &write_data_port);
2309   dev_hook_io(dev, SEC_FEATURES_PORT,
2310               &read_general_port, &write_general_port);
2311   dev_hook_io(dev, SEC_SECT_CNT_PORT,
2312               &read_general_port, &write_general_port);
2313   dev_hook_io(dev, SEC_SECT_ADDR1_PORT,
2314               &read_general_port, &write_general_port);
2315   dev_hook_io(dev, SEC_SECT_ADDR2_PORT,
2316               &read_general_port, &write_general_port);
2317   dev_hook_io(dev, SEC_SECT_ADDR3_PORT,
2318               &read_general_port, &write_general_port);
2319   dev_hook_io(dev, SEC_DRV_SEL_PORT,
2320               &read_general_port, &write_general_port);
2321   dev_hook_io(dev, SEC_CMD_PORT,
2322               &read_status_port, &write_cmd_port);
2323
2324
2325
2326   dev_hook_io(dev, SEC_ADDR_REG_PORT,
2327               &read_general_port, &write_general_port);
2328
2329   dev_hook_io(dev, PRI_ADDR_REG_PORT,
2330               &read_general_port, &write_general_port);
2331
2332
2333
2334   return 0;
2335
2336 }
2337
2338
2339 static int ramdisk_deinit_device(struct vm_device *dev) {
2340   struct ramdisk_t *ramdisk = (struct ramdisk_t *)(dev->private_data);
2341   rd_close_harddrive(ramdisk);
2342   return 0;
2343 }
2344
2345 static struct vm_device_ops dev_ops = {
2346   .init = ramdisk_init_device,
2347   .deinit = ramdisk_deinit_device,
2348   .reset = NULL,
2349   .start = NULL,
2350   .stop = NULL,
2351 };
2352
2353
2354
2355
2356 struct vm_device *create_ramdisk()
2357 {
2358
2359   struct ramdisk_t *ramdisk;
2360   ramdisk = (struct ramdisk_t *)V3_Malloc(sizeof(struct ramdisk_t));
2361   V3_ASSERT(ramdisk != NULL);
2362
2363   PrintDebug("[create_ramdisk]\n");
2364
2365   struct vm_device *device = create_device("RAMDISK", &dev_ops, ramdisk);
2366
2367   return device;
2368 }
2369
2370
2371
2372
2373 #ifdef DEBUG_RAMDISK
2374
2375 static void rd_print_state(struct ramdisk_t * ramdisk) {
2376   uchar_t channel;
2377   uchar_t device;
2378   struct channel_t * channels = (struct channel_t *)(&(ramdisk->channels));
2379
2380   /*
2381   for (channel = 0; channel < MAX_ATA_CHANNEL; channel++) {
2382     memset((char *)(channels + channel), 0, sizeof(struct channel_t));
2383   }
2384   */
2385   PrintDebug("sizeof(*channels) = %d\n", sizeof(*channels));
2386   PrintDebug("sizeof(channles->drives[0].controller) = %d\n", sizeof((channels->drives[0].controller)));
2387   PrintDebug("sizeof(channles->drives[0].cdrom) = %d\n", sizeof((channels->drives[0].cdrom)));
2388   PrintDebug("sizeof(channles->drives[0].sense) = %d\n", sizeof((channels->drives[0].sense)));
2389   PrintDebug("sizeof(channles->drives[0].atapi) = %d\n", sizeof((channels->drives[0].atapi)));
2390
2391
2392   PrintDebug("sizeof(channles->drives[0].controller.status) = %d\n",
2393                 sizeof((channels->drives[0].controller.status)));
2394   PrintDebug("sizeof(channles->drives[0].controller.sector_count) = %d\n",
2395                 sizeof((channels->drives[0].controller.sector_count)));
2396   PrintDebug("sizeof(channles->drives[0].controller.interrupt_reason) = %d\n",
2397                 sizeof((channels->drives[0].controller.interrupt_reason)));
2398
2399   PrintDebug("sizeof(channles->drives[0].controller.cylinder_no) = %d\n",
2400                 sizeof((channels->drives[0].controller.cylinder_no)));
2401   PrintDebug("sizeof(channles->drives[0].controller.byte_count) = %d\n",
2402                 sizeof((channels->drives[0].controller.byte_count)));
2403
2404
2405   PrintDebug("sizeof(channles->drives[0].controller.control) = %d\n",
2406                 sizeof((channels->drives[0].controller.control)));
2407
2408
2409   for (channel = 0; channel < MAX_ATA_CHANNEL; channel++){
2410
2411     for (device = 0; device < 2; device++){
2412
2413       // Initialize controller state, even if device is not present
2414       PrintDebug("channels[%d].drives[%d].controller.status.busy = %d\n",
2415                     channel, device,
2416                     channels[channel].drives[device].controller.status.busy);
2417       PrintDebug("channels[%d].drives[%d].controller.status.drive_ready = %d\n",
2418                     channel, device,
2419                     channels[channel].drives[device].controller.status.drive_ready);
2420       PrintDebug("channels[%d].drives[%d].controller.status.write_fault = %d\n",
2421                     channel, device,
2422                     channels[channel].drives[device].controller.status.write_fault);
2423       PrintDebug("channels[%d].drives[%d].controller.status.seek_complete = %d\n",
2424                     channel, device,
2425                     channels[channel].drives[device].controller.status.seek_complete);
2426       PrintDebug("channels[%d].drives[%d].controller.status.drq = %d\n",
2427                     channel, device,
2428                     channels[channel].drives[device].controller.status.drq);
2429       PrintDebug("channels[%d].drives[%d].controller.status.corrected_data = %d\n",
2430                     channel, device,
2431                     channels[channel].drives[device].controller.status.corrected_data);
2432       PrintDebug("channels[%d].drives[%d].controller.status.index_pulse = %d\n",
2433                     channel, device,
2434                     channels[channel].drives[device].controller.status.index_pulse);
2435       PrintDebug("channels[%d].drives[%d].controller.status.index_pulse_count = %d\n",
2436                     channel, device,
2437                     channels[channel].drives[device].controller.status.index_pulse_count);
2438       PrintDebug("channels[%d].drives[%d].controller.status.err = %d\n",
2439                     channel, device,
2440                     channels[channel].drives[device].controller.status.err);
2441
2442
2443       PrintDebug("channels[%d].drives[%d].controller.error_register = %d\n",
2444                     channel, device,
2445                     channels[channel].drives[device].controller.error_register);
2446       PrintDebug("channels[%d].drives[%d].controller.head_no = %d\n",
2447                     channel, device,
2448                     channels[channel].drives[device].controller.head_no);
2449       PrintDebug("channels[%d].drives[%d].controller.sector_count = %d\n",
2450                     channel, device,
2451                     channels[channel].drives[device].controller.sector_count);
2452       PrintDebug("channels[%d].drives[%d].controller.sector_no = %d\n",
2453                     channel, device,
2454                     channels[channel].drives[device].controller.sector_no);
2455       PrintDebug("channels[%d].drives[%d].controller.cylinder_no = %d\n",
2456                     channel, device,
2457                     channels[channel].drives[device].controller.cylinder_no);
2458       PrintDebug("channels[%d].drives[%d].controller.current_command = %02x\n",
2459                     channel, device,
2460                     channels[channel].drives[device].controller.current_command);
2461       PrintDebug("channels[%d].drives[%d].controller.buffer_index = %d\n",
2462                     channel, device,
2463                     channels[channel].drives[device].controller.buffer_index);
2464
2465
2466       PrintDebug("channels[%d].drives[%d].controller.control.reset = %d\n",
2467                     channel, device,
2468                     channels[channel].drives[device].controller.control.reset);
2469       PrintDebug("channels[%d].drives[%d].controller.control.disable_irq = %d\n",
2470                     channel, device,
2471                     channels[channel].drives[device].controller.control.disable_irq);
2472
2473
2474       PrintDebug("channels[%d].drives[%d].controller.reset_in_progress = %d\n",
2475                     channel, device,
2476                     channels[channel].drives[device].controller.reset_in_progress);
2477       PrintDebug("channels[%d].drives[%d].controller.sectors_per_block = %02x\n",
2478                     channel, device,
2479                     channels[channel].drives[device].controller.sectors_per_block);
2480       PrintDebug("channels[%d].drives[%d].controller.lba_mode = %d\n",
2481                     channel, device,
2482                     channels[channel].drives[device].controller.lba_mode);
2483       PrintDebug("channels[%d].drives[%d].controller.features = %d\n",
2484                     channel, device,
2485                     channels[channel].drives[device].controller.features);
2486
2487
2488       PrintDebug("channels[%d].drives[%d].model_no = %s\n",
2489                     channel, device,
2490                     channels[channel].drives[device].model_no);
2491       PrintDebug("channels[%d].drives[%d].device_type = %d\n",
2492                     channel, device,
2493                     channels[channel].drives[device].device_type);
2494       PrintDebug("channels[%d].drives[%d].cdrom.locked = %d\n",
2495                     channel, device,
2496                     channels[channel].drives[device].cdrom.locked);
2497       PrintDebug("channels[%d].drives[%d].sense.sense_key = %d\n",
2498                     channel, device,
2499                     channels[channel].drives[device].sense.sense_key);
2500       PrintDebug("channels[%d].drives[%d].sense.asc = %d\n",
2501                     channel, device,
2502                     channels[channel].drives[device].sense.asc);
2503       PrintDebug("channels[%d].drives[%d].sense.ascq = %d\n",
2504                     channel, device,
2505                     channels[channel].drives[device].sense.ascq);
2506
2507
2508
2509       PrintDebug("channels[%d].drives[%d].controller.interrupt_reason.c_d = %02x\n",
2510                     channel, device,
2511                     channels[channel].drives[device].controller.interrupt_reason.c_d);
2512
2513       PrintDebug("channels[%d].drives[%d].controller.interrupt_reason.i_o = %02x\n",
2514                     channel, device,
2515                     channels[channel].drives[device].controller.interrupt_reason.i_o);
2516
2517       PrintDebug("channels[%d].drives[%d].controller.interrupt_reason.rel = %02x\n",
2518                     channel, device,
2519                     channels[channel].drives[device].controller.interrupt_reason.rel);
2520
2521       PrintDebug("channels[%d].drives[%d].controller.interrupt_reason.tag = %02x\n",
2522                     channel, device,
2523                     channels[channel].drives[device].controller.interrupt_reason.tag);
2524
2525       PrintDebug("channels[%d].drives[%d].cdrom.ready = %d\n",
2526                     channel, device,
2527                     channels[channel].drives[device].cdrom.ready);
2528
2529     }  //for device
2530   }  //for channel
2531
2532   return;
2533 }
2534
2535 #if 0
2536 static void trace_info(ushort_t port, void *src, uint_t length) {
2537
2538   switch(port){
2539
2540   case 0x3e8:
2541     if (length == 1 && *((uchar_t*) src) == ATA_DETECT)
2542       PrintDebug("ata_detect()\n");
2543     break;
2544
2545   case 0x3e9:
2546     if (length == 1 && *((uchar_t*) src) == ATA_RESET)
2547       PrintDebug("ata_reset()\n");
2548     break;
2549
2550   case 0x3ea:
2551     if (length == 1 && *((uchar_t*) src) == ATA_CMD_DATA_IN)
2552       PrintDebug("ata_cmd_data_in()\n");
2553     break;
2554
2555   case 0x3eb:
2556     if (length == 1 && *((uchar_t*) src) == ATA_CMD_DATA_OUT)
2557       PrintDebug("ata_cmd_data_out()\n");
2558     break;
2559
2560   case 0x3ec:
2561     if (length == 1 && *((uchar_t*) src) == ATA_CMD_PACKET)
2562       PrintDebug("ata_cmd_packet()\n");
2563     break;
2564
2565   case 0x3ed:
2566     if (length == 1 && *((uchar_t*) src) == ATAPI_GET_SENSE)
2567       PrintDebug("atapi_get_sense()\n");
2568     break;
2569
2570   case 0x3ee:
2571     if (length == 1 && *((uchar_t*) src) == ATAPI_IS_READY)
2572       PrintDebug("atapi_is_ready()\n");
2573     break;
2574
2575   case 0x3ef:
2576     if (length == 1 && *((uchar_t*) src) == ATAPI_IS_CDROM)
2577       PrintDebug("atapi_is_cdrom()\n");
2578     break;
2579
2580
2581   case 0x2e8:
2582     if (length == 1 && *((uchar_t*) src) == CDEMU_INIT)
2583       PrintDebug("cdemu_init()\n");
2584     break;
2585
2586   case 0x2e9:
2587     if (length == 1 && *((uchar_t*) src) == CDEMU_ISACTIVE)
2588       PrintDebug("cdemu_isactive()\n");
2589     break;
2590
2591   case 0x2ea:
2592     if (length == 1 && *((uchar_t*) src) == CDEMU_EMULATED_DRIVE)
2593       PrintDebug("cdemu_emulated_drive()\n");
2594     break;
2595
2596   case 0x2eb:
2597     if (length == 1 && *((uchar_t*) src) == CDROM_BOOT)
2598       PrintDebug("cdrom_boot()\n");
2599     break;
2600
2601   case 0x2ec:
2602     if (length == 1 && *((uchar_t*) src) == HARD_DRIVE_POST)
2603       PrintDebug("ata_hard_drive_post()\n");
2604     break;
2605
2606   case 0x2ed:
2607     if (length == 1)
2608       PrintDebug("ata_device_no(%d)\n", *((uchar_t*) src));
2609     break;
2610
2611   case 0x2ee:
2612     if (length == 1)
2613       PrintDebug("ata_device_type(%d)\n", *((uchar_t*) src));
2614     break;
2615
2616   case 0x2ef:
2617     if (length == 1 && *((uchar_t*) src) == INT13_HARDDISK)
2618       PrintDebug("int13_harddrive()\n");
2619     break;
2620
2621   case 0x2f8:
2622     if (length == 1 && *((uchar_t*) src) == INT13_CDROM)
2623       PrintDebug("int13_cdrom()\n");
2624     break;
2625
2626   case 0x2f9:
2627     if (length == 1 && *((uchar_t*) src) == INT13_CDEMU)
2628       PrintDebug("int13_cdemu()\n");
2629     break;
2630
2631   case 0x2fa:
2632     if (length == 1 && *((uchar_t*) src) == INT13_ELTORITO)
2633       PrintDebug("int13_eltorito()\n");
2634     break;
2635
2636   case 0x2fb:
2637     if (length == 1 && *((uchar_t*) src) == INT13_DISKETTE_FUNCTION)
2638       PrintDebug("int13_diskette_function()\n");
2639     break;
2640
2641
2642   default:
2643     break;
2644   }
2645 }
2646
2647 #endif
2648
2649 static int check_bit_fields(struct controller_t * controller) {
2650   //Check bit fields
2651   controller->sector_count = 0;
2652   controller->interrupt_reason.c_d = 1;
2653   if (controller->sector_count != 0x01) {
2654     return INTR_REASON_BIT_ERR;
2655   }
2656
2657   controller->sector_count = 0;
2658   controller->interrupt_reason.i_o = 1;
2659   if (controller->sector_count != 0x02) {
2660     return INTR_REASON_BIT_ERR;
2661   }
2662
2663   controller->sector_count = 0;
2664   controller->interrupt_reason.rel = 1;
2665   if (controller->sector_count != 0x04) {
2666     return INTR_REASON_BIT_ERR;
2667   }
2668
2669   controller->sector_count = 0;
2670   controller->interrupt_reason.tag = 3;
2671   if (controller->sector_count != 0x18) {
2672     return INTR_REASON_BIT_ERR;
2673   }
2674
2675   return 0;
2676 }
2677 #endif