palacios/src/devices/ide.c

   1 /*
   2  * This file is part of the Palacios Virtual Machine Monitor developed
   3  * by the V3VEE Project with funding from the United States National
   4  * Science Foundation and the Department of Energy.
   5  *
   6  * The V3VEE Project is a joint project between Northwestern University
   7  * and the University of New Mexico.  You can find out more at
   8  * http://www.v3vee.org
   9  *
  10  * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
  11  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
  12  * All rights reserved.
  13  *
  14  * Author: Jack Lange <jarusl@cs.northwestern.edu>
  15  *
  16  * This is free software.  You are permitted to use,
  17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  18  */
  19
  20 #include <palacios/vmm.h>
  21 #include <devices/ide.h>
  22 #include "ide-types.h"
  23 #include "atapi-types.h"
  24
  25 #define PRI_DEFAULT_IRQ 14
  26 #define SEC_DEFAULT_IRQ 15
  27
  28
  29 #define PRI_DATA_PORT         0x1f0
  30 #define PRI_FEATURES_PORT     0x1f1
  31 #define PRI_SECT_CNT_PORT     0x1f2
  32 #define PRI_SECT_NUM_PORT     0x1f3
  33 #define PRI_CYL_LOW_PORT      0x1f4
  34 #define PRI_CYL_HIGH_PORT     0x1f5
  35 #define PRI_DRV_SEL_PORT      0x1f6
  36 #define PRI_CMD_PORT          0x1f7
  37 #define PRI_CTRL_PORT         0x3f6
  38 #define PRI_ADDR_REG_PORT     0x3f7
  39
  40 #define SEC_DATA_PORT         0x170
  41 #define SEC_FEATURES_PORT     0x171
  42 #define SEC_SECT_CNT_PORT     0x172
  43 #define SEC_SECT_NUM_PORT     0x173
  44 #define SEC_CYL_LOW_PORT      0x174
  45 #define SEC_CYL_HIGH_PORT     0x175
  46 #define SEC_DRV_SEL_PORT      0x176
  47 #define SEC_CMD_PORT          0x177
  48 #define SEC_CTRL_PORT         0x376
  49 #define SEC_ADDR_REG_PORT     0x377
  50
  51
  52 #define DATA_BUFFER_SIZE 2048
  53
  54 static const char * ide_dev_type_strs[] = {"HARDDISK", "CDROM", "NONE"};
  55
  56
  57 static inline const char * device_type_to_str(v3_ide_dev_type_t type) {
  58     if (type > 2) {
  59         return NULL;
  60     }
  61
  62     return ide_dev_type_strs[type];
  63 }
  64
  65
  66
  67 struct ide_cd_state {
  68     struct atapi_sense_data sense;
  69     uint_t current_lba;
  70 };
  71
  72 struct ide_hd_state {
  73
  74 };
  75
  76 struct ide_drive {
  77     // Command Registers
  78
  79     v3_ide_dev_type_t drive_type;
  80
  81     union {
  82         struct v3_ide_cd_ops * cd_ops;
  83         struct v3_ide_hd_ops * hd_ops;
  84     };
  85
  86
  87     union {
  88         struct ide_cd_state cd_state;
  89         struct ide_hd_state hd_state;
  90     };
  91
  92     char model[41];
  93
  94     // Where we are in the data transfer
  95     uint_t transfer_index;
  96
  97     // the length of a transfer
  98     // calculated for easy access
  99     uint_t transfer_length;
 100
 101     // We have a local data buffer that we use for IO port accesses
 102     uint8_t data_buf[DATA_BUFFER_SIZE];
 103
 104     void * private_data;
 105
 106     uint8_t sector_count;             // 0x1f2,0x172
 107     uint8_t sector_num;               // 0x1f3,0x173
 108     union {
 109         uint16_t cylinder;
 110         struct {
 111             uint8_t cylinder_low;       // 0x1f4,0x174
 112             uint8_t cylinder_high;      // 0x1f5,0x175
 113         } __attribute__((packed));
 114     } __attribute__((packed));
 115
 116
 117 };
 118
 119
 120
 121 struct ide_channel {
 122     struct ide_drive drives[2];
 123
 124     // Command Registers
 125     struct ide_error_reg error_reg;     // [read] 0x1f1,0x171
 126
 127     struct ide_features_reg features;
 128
 129     struct ide_drive_head_reg drive_head; // 0x1f6,0x176
 130
 131     struct ide_status_reg status;       // [read] 0x1f7,0x177
 132     uint8_t cmd_reg;                // [write] 0x1f7,0x177
 133
 134     int irq; // this is temporary until we add PCI support
 135
 136     // Control Registers
 137     struct ide_ctrl_reg ctrl_reg; // [write] 0x3f6,0x376
 138 };
 139
 140
 141
 142 struct ide_internal {
 143     struct ide_channel channels[2];
 144 };
 145
 146
 147
 148 static inline uint32_t be_to_le_16(const uint16_t val) {
 149     uint8_t * buf = (uint8_t *)&val;
 150     return (buf[0] << 8) | (buf[1]) ;
 151 }
 152
 153
 154 static inline uint32_t be_to_le_32(const uint32_t val) {
 155     uint8_t * buf = (uint8_t *)&val;
 156     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
 157 }
 158
 159
 160 static inline int get_channel_index(ushort_t port) {
 161     if (((port & 0xfff8) == 0x1f0) ||
 162         ((port & 0xfffe) == 0x3f6)) {
 163         return 0;
 164     } else if (((port & 0xfff8) == 0x170) ||
 165                ((port & 0xfffe) == 0x376)) {
 166         return 1;
 167     }
 168
 169     return -1;
 170 }
 171
 172 static inline struct ide_channel * get_selected_channel(struct ide_internal * ide, ushort_t port) {
 173     int channel_idx = get_channel_index(port);
 174     return &(ide->channels[channel_idx]);
 175 }
 176
 177 static inline struct ide_drive * get_selected_drive(struct ide_channel * channel) {
 178     return &(channel->drives[channel->drive_head.drive_sel]);
 179 }
 180
 181
 182 static inline int is_lba_enabled(struct ide_channel * channel) {
 183     return channel->drive_head.lba_mode;
 184 }
 185
 186
 187 static void ide_raise_irq(struct vm_device * dev, struct ide_channel * channel) {
 188     if (channel->ctrl_reg.irq_disable == 0) {
 189         v3_raise_irq(dev->vm, channel->irq);
 190     }
 191 }
 192
 193
 194 static void drive_reset(struct ide_drive * drive) {
 195     drive->sector_count = 0x01;
 196     drive->sector_num = 0x01;
 197
 198     if (drive->drive_type == IDE_CDROM) {
 199         drive->cylinder = 0xeb14;
 200     } else {
 201         drive->cylinder = 0x0000;
 202     }
 203
 204
 205     memset(drive->data_buf, 0, sizeof(drive->data_buf));
 206     drive->transfer_length = 0;
 207     drive->transfer_index = 0;
 208
 209     // Send the reset signal to the connected device callbacks
 210     //     channel->drives[0].reset();
 211     //    channel->drives[1].reset();
 212 }
 213
 214 static void channel_reset(struct ide_channel * channel) {
 215
 216     // set busy and seek complete flags
 217     channel->status.val = 0x90;
 218
 219     // Clear errors
 220     channel->error_reg.val = 0x01;
 221
 222     // clear commands
 223     channel->cmd_reg = 0x00;
 224
 225     channel->ctrl_reg.irq_disable = 0;
 226 }
 227
 228 static void channel_reset_complete(struct ide_channel * channel) {
 229     channel->status.busy = 0;
 230     channel->status.ready = 1;
 231
 232     channel->drive_head.head_num = 0;
 233
 234     drive_reset(&(channel->drives[0]));
 235     drive_reset(&(channel->drives[1]));
 236 }
 237
 238
 239 static void ide_abort_command(struct vm_device * dev, struct ide_channel * channel) {
 240     channel->status.val = 0x41; // Error + ready
 241     channel->error_reg.val = 0x04; // No idea...
 242
 243     ide_raise_irq(dev, channel);
 244 }
 245
 246
 247
 248
 249 // Include the ATAPI interface handlers
 250 #include "atapi.h"
 251
 252
 253
 254
 255 static int write_cmd_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
 256     struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
 257     struct ide_channel * channel = get_selected_channel(ide, port);
 258     struct ide_drive * drive = get_selected_drive(channel);
 259
 260     if (length != 1) {
 261         PrintError("Invalid Write Length on IDE command Port %x\n", port);
 262         return -1;
 263     }
 264
 265     PrintDebug("IDE: Writing Command Port %x (val=%x)\n", port, *(uint8_t *)src);
 266
 267     channel->cmd_reg = *(uint8_t *)src;
 268
 269     switch (channel->cmd_reg) {
 270
 271         case 0xa0: // ATAPI Command Packet
 272             if (drive->drive_type != IDE_CDROM) {
 273                 ide_abort_command(dev, channel);
 274             }
 275
 276             drive->sector_count = 1;
 277
 278             channel->status.busy = 0;
 279             channel->status.write_fault = 0;
 280             channel->status.data_req = 1;
 281             channel->status.error = 0;
 282
 283             // reset the data buffer...
 284             drive->transfer_length = ATAPI_PACKET_SIZE;
 285             drive->transfer_index = 0;
 286
 287             break;
 288         case 0xa1: // ATAPI Identify Device Packet
 289             atapi_identify_device(drive);
 290
 291             channel->error_reg.val = 0;
 292             channel->status.val = 0x58; // ready, data_req, seek_complete
 293
 294             ide_raise_irq(dev, channel);
 295             break;
 296         case 0xec: // Identify Device
 297             if (drive->drive_type != IDE_DISK) {
 298                 drive_reset(drive);
 299
 300                 // JRL: Should we abort here?
 301                 ide_abort_command(dev, channel);
 302             } else {
 303                 PrintError("IDE Disks currently not implemented\n");
 304                 return -1;
 305             }
 306             break;
 307         default:
 308             PrintError("Unimplemented IDE command (%x)\n", channel->cmd_reg);
 309             return -1;
 310     }
 311
 312     return length;
 313 }
 314
 315
 316 static int write_data_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
 317     struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
 318     struct ide_channel * channel = get_selected_channel(ide, port);
 319     struct ide_drive * drive = get_selected_drive(channel);
 320
 321     PrintDebug("IDE: Writing Data Port %x (val=%x, len=%d)\n", port, *(uint32_t *)src, length);
 322
 323     memcpy(drive->data_buf + drive->transfer_index, src, length);
 324     drive->transfer_index += length;
 325
 326     // Transfer is complete, dispatch the command
 327     if (drive->transfer_index >= drive->transfer_length) {
 328         switch (channel->cmd_reg) {
 329             case 0x30: // Write Sectors
 330                 PrintError("Writing Data not yet implemented\n");
 331                 return -1;
 332
 333             case 0xa0: // ATAPI packet command
 334                 if (atapi_handle_packet(dev, channel) == -1) {
 335                     PrintError("Error handling ATAPI packet\n");
 336                     return -1;
 337                 }
 338                 break;
 339             default:
 340                 PrintError("Unhandld IDE Command %x\n", channel->cmd_reg);
 341                 return -1;
 342         }
 343     }
 344
 345     return length;
 346 }
 347
 348
 349 static int read_data_port(ushort_t port, void * dst, uint_t length, struct vm_device * dev) {
 350     struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
 351     struct ide_channel * channel = get_selected_channel(ide, port);
 352     struct ide_drive * drive = get_selected_drive(channel);
 353     int data_offset = drive->transfer_index % DATA_BUFFER_SIZE;
 354
 355     PrintDebug("IDE: Reading Data Port %x\n", port);
 356
 357     if (data_offset == DATA_BUFFER_SIZE) {
 358         // check for more data to transfer, if there isn't any then that's a problem...
 359         /*
 360          *  if (ide_update_buffer(drive) == -1) {
 361          *  return -1;
 362          *  }
 363          */
 364         return -1;
 365     }
 366
 367
 368     // check for overruns...
 369     // We will return the data padded with 0's
 370     if (drive->transfer_index + length > drive->transfer_length) {
 371         length = drive->transfer_length - drive->transfer_index;
 372         memset(dst, 0, length);
 373     }
 374
 375     memcpy(dst, drive->data_buf + data_offset, length);
 376
 377     drive->transfer_index += length;
 378
 379
 380     if (drive->transfer_index >= drive->transfer_length) {
 381         channel->status.data_req = 0;
 382     }
 383
 384     return length;
 385 }
 386
 387 static int write_port_std(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
 388     struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
 389     struct ide_channel * channel = get_selected_channel(ide, port);
 390     struct ide_drive * drive = get_selected_drive(channel);
 391
 392     if (length != 1) {
 393         PrintError("Invalid Write length on IDE port %x\n", port);
 394         return -1;
 395     }
 396
 397     PrintDebug("IDE: Writing Standard Port %x (val=%x)\n", port, *(uint8_t *)src);
 398
 399
 400     switch (port) {
 401         // reset and interrupt enable
 402         case PRI_CTRL_PORT:
 403         case SEC_CTRL_PORT: {
 404             struct ide_ctrl_reg * tmp_ctrl = (struct ide_ctrl_reg *)src;
 405
 406             // only reset channel on a 0->1 reset bit transition
 407             if ((!channel->ctrl_reg.soft_reset) && (tmp_ctrl->soft_reset)) {
 408                 channel_reset(channel);
 409             } else if ((channel->ctrl_reg.soft_reset) && (!tmp_ctrl->soft_reset)) {
 410                 channel_reset_complete(channel);
 411             }
 412
 413             channel->ctrl_reg.val = tmp_ctrl->val;
 414             break;
 415         }
 416         case PRI_FEATURES_PORT:
 417         case SEC_FEATURES_PORT:
 418             channel->features.val = *(uint8_t *)src;
 419             break;
 420
 421         case PRI_SECT_CNT_PORT:
 422         case SEC_SECT_CNT_PORT:
 423             drive->sector_count = *(uint8_t *)src;
 424             break;
 425
 426         case PRI_SECT_NUM_PORT:
 427         case SEC_SECT_NUM_PORT:
 428             drive->sector_num = *(uint8_t *)src;
 429
 430         case PRI_CYL_LOW_PORT:
 431         case SEC_CYL_LOW_PORT:
 432             drive->cylinder_low = *(uint8_t *)src;
 433             break;
 434
 435         case PRI_CYL_HIGH_PORT:
 436         case SEC_CYL_HIGH_PORT:
 437             drive->cylinder_high = *(uint8_t *)src;
 438             break;
 439
 440         case PRI_DRV_SEL_PORT:
 441         case SEC_DRV_SEL_PORT: {
 442             channel->drive_head.val = *(uint8_t *)src;
 443
 444             // make sure the reserved bits are ok..
 445             // JRL TODO: check with new ramdisk to make sure this is right...
 446             channel->drive_head.val |= 0xa0;
 447
 448             drive = get_selected_drive(channel);
 449
 450             // Selecting a non-present device is a no-no
 451             if (drive->drive_type == IDE_NONE) {
 452                 PrintDebug("Attempting to select a non-present drive\n");
 453                 channel->error_reg.abort = 1;
 454                 channel->status.error = 1;
 455             }
 456
 457             break;
 458         }
 459         default:
 460             PrintError("IDE: Write to unknown Port %x\n", port);
 461             return -1;
 462     }
 463     return length;
 464 }
 465
 466
 467 static int read_port_std(ushort_t port, void * dst, uint_t length, struct vm_device * dev) {
 468     struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
 469     struct ide_channel * channel = get_selected_channel(ide, port);
 470     struct ide_drive * drive = get_selected_drive(channel);
 471
 472     if (length != 1) {
 473         PrintError("Invalid Read length on IDE port %x\n", port);
 474         return -1;
 475     }
 476
 477     PrintDebug("IDE: Reading Standard Port %x\n", port);
 478
 479
 480     if ((port == PRI_ADDR_REG_PORT) ||
 481         (port == SEC_ADDR_REG_PORT)) {
 482         // unused, return 0xff
 483         *(uint8_t *)dst = 0xff;
 484         return length;
 485     }
 486
 487
 488     // if no drive is present just return 0 + reserved bits
 489     if (drive->drive_type == IDE_NONE) {
 490         if ((port == PRI_DRV_SEL_PORT) ||
 491             (port == SEC_DRV_SEL_PORT)) {
 492             *(uint8_t *)dst = 0xa0;
 493         } else {
 494             *(uint8_t *)dst = 0;
 495         }
 496
 497         return length;
 498     }
 499
 500     switch (port) {
 501
 502         // This is really the error register.
 503         case PRI_FEATURES_PORT:
 504         case SEC_FEATURES_PORT:
 505             *(uint8_t *)dst = channel->error_reg.val;
 506             break;
 507
 508         case PRI_SECT_CNT_PORT:
 509         case SEC_SECT_CNT_PORT:
 510             *(uint8_t *)dst = drive->sector_count;
 511             break;
 512
 513         case PRI_SECT_NUM_PORT:
 514         case SEC_SECT_NUM_PORT:
 515             *(uint8_t *)dst = drive->sector_num;
 516             break;
 517
 518         case PRI_CYL_LOW_PORT:
 519         case SEC_CYL_LOW_PORT:
 520             *(uint8_t *)dst = drive->cylinder_low;
 521             break;
 522
 523
 524         case PRI_CYL_HIGH_PORT:
 525         case SEC_CYL_HIGH_PORT:
 526             *(uint8_t *)dst = drive->cylinder_high;
 527             break;
 528
 529         case PRI_DRV_SEL_PORT:
 530         case SEC_DRV_SEL_PORT:  // hard disk drive and head register 0x1f6
 531             *(uint8_t *)dst = channel->drive_head.val;
 532             break;
 533
 534         case PRI_CTRL_PORT:
 535         case SEC_CTRL_PORT:
 536         case PRI_CMD_PORT:
 537         case SEC_CMD_PORT:
 538             // Something about lowering interrupts here....
 539             *(uint8_t *)dst = channel->status.val;
 540             break;
 541
 542         default:
 543             PrintError("Invalid Port: %x\n", port);
 544             return -1;
 545     }
 546
 547     PrintDebug("\tVal=%x\n", *(uint8_t *)dst);
 548
 549     return length;
 550 }
 551
 552
 553
 554 static void init_drive(struct ide_drive * drive) {
 555
 556     drive->sector_count = 0x01;
 557     drive->sector_num = 0x01;
 558     drive->cylinder = 0x0000;
 559
 560     drive->drive_type = IDE_NONE;
 561
 562     memset(drive->model, 0, sizeof(drive->model));
 563
 564     drive->transfer_index = 0;
 565     drive->transfer_length = 0;
 566     memset(drive->data_buf, 0, sizeof(drive->data_buf));
 567
 568     drive->private_data = NULL;
 569     drive->cd_ops = NULL;
 570 }
 571
 572 static void init_channel(struct ide_channel * channel) {
 573     int i = 0;
 574
 575     channel->error_reg.val = 0x01;
 576     channel->drive_head.val = 0x00;
 577     channel->status.val = 0x00;
 578     channel->cmd_reg = 0x00;
 579     channel->ctrl_reg.val = 0x08;
 580
 581
 582     for (i = 0; i < 2; i++) {
 583         init_drive(&(channel->drives[i]));
 584     }
 585
 586 }
 587
 588 static void init_ide_state(struct ide_internal * ide) {
 589     int i;
 590
 591     for (i = 0; i < 2; i++) {
 592         init_channel(&(ide->channels[i]));
 593
 594         // JRL: this is a terrible hack...
 595         ide->channels[i].irq = PRI_DEFAULT_IRQ + i;
 596     }
 597 }
 598
 599
 600
 601 static int init_ide(struct vm_device * dev) {
 602     struct ide_internal * ide = (struct ide_internal *)(dev->private_data);
 603
 604     PrintDebug("IDE: Initializing IDE\n");
 605
 606     init_ide_state(ide);
 607
 608
 609     v3_dev_hook_io(dev, PRI_CTRL_PORT,
 610                    &read_port_std, &write_port_std);
 611
 612     v3_dev_hook_io(dev, PRI_DATA_PORT,
 613                    &read_data_port, &write_data_port);
 614     v3_dev_hook_io(dev, PRI_FEATURES_PORT,
 615                    &read_port_std, &write_port_std);
 616     v3_dev_hook_io(dev, PRI_SECT_CNT_PORT,
 617                    &read_port_std, &write_port_std);
 618     v3_dev_hook_io(dev, PRI_SECT_NUM_PORT,
 619                    &read_port_std, &write_port_std);
 620     v3_dev_hook_io(dev, PRI_CYL_LOW_PORT,
 621                    &read_port_std, &write_port_std);
 622     v3_dev_hook_io(dev, PRI_CYL_HIGH_PORT,
 623                    &read_port_std, &write_port_std);
 624     v3_dev_hook_io(dev, PRI_DRV_SEL_PORT,
 625                    &read_port_std, &write_port_std);
 626     v3_dev_hook_io(dev, PRI_CMD_PORT,
 627                    &read_port_std, &write_cmd_port);
 628
 629
 630     v3_dev_hook_io(dev, SEC_CTRL_PORT,
 631                    &read_port_std, &write_port_std);
 632
 633     v3_dev_hook_io(dev, SEC_DATA_PORT,
 634                    &read_data_port, &write_data_port);
 635     v3_dev_hook_io(dev, SEC_FEATURES_PORT,
 636                    &read_port_std, &write_port_std);
 637     v3_dev_hook_io(dev, SEC_SECT_CNT_PORT,
 638                    &read_port_std, &write_port_std);
 639     v3_dev_hook_io(dev, SEC_SECT_NUM_PORT,
 640                    &read_port_std, &write_port_std);
 641     v3_dev_hook_io(dev, SEC_CYL_LOW_PORT,
 642                    &read_port_std, &write_port_std);
 643     v3_dev_hook_io(dev, SEC_CYL_HIGH_PORT,
 644                    &read_port_std, &write_port_std);
 645     v3_dev_hook_io(dev, SEC_DRV_SEL_PORT,
 646                    &read_port_std, &write_port_std);
 647     v3_dev_hook_io(dev, SEC_CMD_PORT,
 648                    &read_port_std, &write_cmd_port);
 649
 650
 651
 652     v3_dev_hook_io(dev, SEC_ADDR_REG_PORT,
 653                    &read_port_std, &write_port_std);
 654
 655     v3_dev_hook_io(dev, PRI_ADDR_REG_PORT,
 656                    &read_port_std, &write_port_std);
 657
 658     return 0;
 659 }
 660
 661
 662 static int deinit_ide(struct vm_device * dev) {
 663     // unhook io ports....
 664     // deregister from PCI?
 665     return 0;
 666 }
 667
 668
 669 static struct vm_device_ops dev_ops = {
 670     .init = init_ide,
 671     .deinit = deinit_ide,
 672     .reset = NULL,
 673     .start = NULL,
 674     .stop = NULL,
 675 };
 676
 677
 678 struct vm_device *  v3_create_ide() {
 679     struct ide_internal * ide  = (struct ide_internal *)V3_Malloc(sizeof(struct ide_internal));
 680     struct vm_device * device = v3_create_device("IDE", &dev_ops, ide);
 681
 682     //    ide->pci = pci;
 683
 684     PrintDebug("IDE: Creating IDE bus x 2\n");
 685
 686     return device;
 687 }
 688
 689
 690
 691
 692
 693 int v3_ide_register_cdrom(struct vm_device * ide_dev,
 694                           uint_t bus_num,
 695                           uint_t drive_num,
 696                           char * dev_name,
 697                           struct v3_ide_cd_ops * ops,
 698                           void * private_data) {
 699
 700     struct ide_internal * ide  = (struct ide_internal *)(ide_dev->private_data);
 701     struct ide_channel * channel = NULL;
 702     struct ide_drive * drive = NULL;
 703
 704     V3_ASSERT((bus_num >= 0) && (bus_num < 2));
 705     V3_ASSERT((drive_num >= 0) && (drive_num < 2));
 706
 707     channel = &(ide->channels[bus_num]);
 708     drive = &(channel->drives[drive_num]);
 709
 710     if (drive->drive_type != IDE_NONE) {
 711         PrintError("Device slot (bus=%d, drive=%d) already occupied\n", bus_num, drive_num);
 712         return -1;
 713     }
 714
 715     strncpy(drive->model, dev_name, sizeof(drive->model) - 1);
 716
 717     while (strlen((char *)(drive->model)) < 40) {
 718         strcat((char*)(drive->model), " ");
 719     }
 720
 721
 722     drive->drive_type = IDE_CDROM;
 723
 724     drive->cd_ops = ops;
 725
 726     drive->private_data = private_data;
 727
 728     return 0;
 729 }
 730
 731
 732 int v3_ide_register_harddisk(struct vm_device * ide_dev,
 733                              uint_t bus_num,
 734                              uint_t drive_num,
 735                              char * dev_name,
 736                              struct v3_ide_hd_ops * ops,
 737                              void * private_data) {
 738
 739     struct ide_internal * ide  = (struct ide_internal *)(ide_dev->private_data);
 740     struct ide_channel * channel = NULL;
 741     struct ide_drive * drive = NULL;
 742
 743     V3_ASSERT((bus_num >= 0) && (bus_num < 2));
 744     V3_ASSERT((drive_num >= 0) && (drive_num < 2));
 745
 746     channel = &(ide->channels[bus_num]);
 747     drive = &(channel->drives[drive_num]);
 748
 749     if (drive->drive_type != IDE_NONE) {
 750         PrintError("Device slot (bus=%d, drive=%d) already occupied\n", bus_num, drive_num);
 751         return -1;
 752     }
 753
 754     strncpy(drive->model, dev_name, sizeof(drive->model) - 1);
 755
 756     drive->drive_type = IDE_DISK;
 757
 758     drive->hd_ops = ops;
 759
 760     drive->private_data = private_data;
 761
 762     return 0;
 763 }