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 <palacios/vmm_dev_mgr.h>
  22 #include <palacios/vm_guest_mem.h>
  23 #include <devices/ide.h>
  24 #include <devices/pci.h>
  25 #include <devices/southbridge.h>
  26 #include "ide-types.h"
  27 #include "atapi-types.h"
  28
  29 #ifndef CONFIG_DEBUG_IDE
  30 #undef PrintDebug
  31 #define PrintDebug(fmt, args...)
  32 #endif
  33
  34 #define PRI_DEFAULT_IRQ 14
  35 #define SEC_DEFAULT_IRQ 15
  36
  37
  38 #define PRI_DATA_PORT         0x1f0
  39 #define PRI_FEATURES_PORT     0x1f1
  40 #define PRI_SECT_CNT_PORT     0x1f2
  41 #define PRI_SECT_NUM_PORT     0x1f3
  42 #define PRI_CYL_LOW_PORT      0x1f4
  43 #define PRI_CYL_HIGH_PORT     0x1f5
  44 #define PRI_DRV_SEL_PORT      0x1f6
  45 #define PRI_CMD_PORT          0x1f7
  46 #define PRI_CTRL_PORT         0x3f6
  47 #define PRI_ADDR_REG_PORT     0x3f7
  48
  49 #define SEC_DATA_PORT         0x170
  50 #define SEC_FEATURES_PORT     0x171
  51 #define SEC_SECT_CNT_PORT     0x172
  52 #define SEC_SECT_NUM_PORT     0x173
  53 #define SEC_CYL_LOW_PORT      0x174
  54 #define SEC_CYL_HIGH_PORT     0x175
  55 #define SEC_DRV_SEL_PORT      0x176
  56 #define SEC_CMD_PORT          0x177
  57 #define SEC_CTRL_PORT         0x376
  58 #define SEC_ADDR_REG_PORT     0x377
  59
  60
  61 #define PRI_DEFAULT_DMA_PORT 0xc000
  62 #define SEC_DEFAULT_DMA_PORT 0xc008
  63
  64 #define DATA_BUFFER_SIZE 2048
  65
  66 #define ATAPI_BLOCK_SIZE 2048
  67 #define HD_SECTOR_SIZE 512
  68
  69
  70 static const char * ide_pri_port_strs[] = {"PRI_DATA", "PRI_FEATURES", "PRI_SECT_CNT", "PRI_SECT_NUM",
  71                                           "PRI_CYL_LOW", "PRI_CYL_HIGH", "PRI_DRV_SEL", "PRI_CMD",
  72                                            "PRI_CTRL", "PRI_ADDR_REG"};
  73
  74
  75 static const char * ide_sec_port_strs[] = {"SEC_DATA", "SEC_FEATURES", "SEC_SECT_CNT", "SEC_SECT_NUM",
  76                                           "SEC_CYL_LOW", "SEC_CYL_HIGH", "SEC_DRV_SEL", "SEC_CMD",
  77                                            "SEC_CTRL", "SEC_ADDR_REG"};
  78
  79 static const char * ide_dma_port_strs[] = {"DMA_CMD", NULL, "DMA_STATUS", NULL,
  80                                            "DMA_PRD0", "DMA_PRD1", "DMA_PRD2", "DMA_PRD3"};
  81
  82
  83 typedef enum {BLOCK_NONE, BLOCK_DISK, BLOCK_CDROM} v3_block_type_t;
  84
  85 static inline const char * io_port_to_str(uint16_t port) {
  86     if ((port >= PRI_DATA_PORT) && (port <= PRI_CMD_PORT)) {
  87         return ide_pri_port_strs[port - PRI_DATA_PORT];
  88     } else if ((port >= SEC_DATA_PORT) && (port <= SEC_CMD_PORT)) {
  89         return ide_sec_port_strs[port - SEC_DATA_PORT];
  90     } else if ((port == PRI_CTRL_PORT) || (port == PRI_ADDR_REG_PORT)) {
  91         return ide_pri_port_strs[port - PRI_CTRL_PORT + 8];
  92     } else if ((port == SEC_CTRL_PORT) || (port == SEC_ADDR_REG_PORT)) {
  93         return ide_sec_port_strs[port - SEC_CTRL_PORT + 8];
  94     }
  95     return NULL;
  96 }
  97
  98
  99 static inline const char * dma_port_to_str(uint16_t port) {
 100     return ide_dma_port_strs[port & 0x7];
 101 }
 102
 103
 104
 105 struct ide_cd_state {
 106     struct atapi_sense_data sense;
 107
 108     uint8_t atapi_cmd;
 109     struct atapi_error_recovery err_recovery;
 110 };
 111
 112 struct ide_hd_state {
 113     int accessed;
 114
 115     /* this is the multiple sector transfer size as configured for read/write multiple sectors*/
 116     uint_t mult_sector_num;
 117
 118     /* This is the current op sector size:
 119      * for multiple sector ops this equals mult_sector_num
 120      * for standard ops this equals 1
 121      */
 122     uint_t cur_sector_num;
 123 };
 124
 125 struct ide_drive {
 126     // Command Registers
 127
 128     v3_block_type_t drive_type;
 129
 130     struct v3_dev_blk_ops * ops;
 131
 132     union {
 133         struct ide_cd_state cd_state;
 134         struct ide_hd_state hd_state;
 135     };
 136
 137     char model[41];
 138
 139     // Where we are in the data transfer
 140     uint_t transfer_index;
 141
 142     // the length of a transfer
 143     // calculated for easy access
 144     uint_t transfer_length;
 145
 146     uint64_t current_lba;
 147
 148     // We have a local data buffer that we use for IO port accesses
 149     uint8_t data_buf[DATA_BUFFER_SIZE];
 150
 151
 152     uint32_t num_cylinders;
 153     uint32_t num_heads;
 154     uint32_t num_sectors;
 155
 156     void * private_data;
 157
 158     union {
 159         uint8_t sector_count;             // 0x1f2,0x172
 160         struct atapi_irq_flags irq_flags;
 161     } __attribute__((packed));
 162
 163     union {
 164         uint8_t sector_num;               // 0x1f3,0x173
 165         uint8_t lba0;
 166     } __attribute__((packed));
 167
 168     union {
 169         uint16_t cylinder;
 170         uint16_t lba12;
 171
 172         struct {
 173             uint8_t cylinder_low;       // 0x1f4,0x174
 174             uint8_t cylinder_high;      // 0x1f5,0x175
 175         } __attribute__((packed));
 176
 177         struct {
 178             uint8_t lba1;
 179             uint8_t lba2;
 180         } __attribute__((packed));
 181
 182
 183         // The transfer length requested by the CPU
 184         uint16_t req_len;
 185     } __attribute__((packed));
 186
 187 };
 188
 189
 190
 191 struct ide_channel {
 192     struct ide_drive drives[2];
 193
 194     // Command Registers
 195     struct ide_error_reg error_reg;     // [read] 0x1f1,0x171
 196
 197     struct ide_features_reg features;
 198
 199     struct ide_drive_head_reg drive_head; // 0x1f6,0x176
 200
 201     struct ide_status_reg status;       // [read] 0x1f7,0x177
 202     uint8_t cmd_reg;                // [write] 0x1f7,0x177
 203
 204     int irq; // this is temporary until we add PCI support
 205
 206     // Control Registers
 207     struct ide_ctrl_reg ctrl_reg; // [write] 0x3f6,0x376
 208
 209     struct ide_dma_cmd_reg dma_cmd;
 210     struct ide_dma_status_reg dma_status;
 211     uint32_t dma_prd_addr;
 212     uint_t dma_tbl_index;
 213 };
 214
 215
 216
 217 struct ide_internal {
 218     struct ide_channel channels[2];
 219
 220     struct v3_southbridge * southbridge;
 221     struct vm_device * pci_bus;
 222
 223     struct pci_device * ide_pci;
 224
 225     struct v3_vm_info * vm;
 226 };
 227
 228
 229
 230
 231
 232 /* Utility functions */
 233
 234 static inline uint16_t be_to_le_16(const uint16_t val) {
 235     uint8_t * buf = (uint8_t *)&val;
 236     return (buf[0] << 8) | (buf[1]) ;
 237 }
 238
 239 static inline uint16_t le_to_be_16(const uint16_t val) {
 240     return be_to_le_16(val);
 241 }
 242
 243
 244 static inline uint32_t be_to_le_32(const uint32_t val) {
 245     uint8_t * buf = (uint8_t *)&val;
 246     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
 247 }
 248
 249 static inline uint32_t le_to_be_32(const uint32_t val) {
 250     return be_to_le_32(val);
 251 }
 252
 253
 254 static inline int get_channel_index(ushort_t port) {
 255     if (((port & 0xfff8) == 0x1f0) ||
 256         ((port & 0xfffe) == 0x3f6) ||
 257         ((port & 0xfff8) == 0xc000)) {
 258         return 0;
 259     } else if (((port & 0xfff8) == 0x170) ||
 260                ((port & 0xfffe) == 0x376) ||
 261                ((port & 0xfff8) == 0xc008)) {
 262         return 1;
 263     }
 264
 265     return -1;
 266 }
 267
 268 static inline struct ide_channel * get_selected_channel(struct ide_internal * ide, ushort_t port) {
 269     int channel_idx = get_channel_index(port);
 270     return &(ide->channels[channel_idx]);
 271 }
 272
 273 static inline struct ide_drive * get_selected_drive(struct ide_channel * channel) {
 274     return &(channel->drives[channel->drive_head.drive_sel]);
 275 }
 276
 277
 278 static inline int is_lba_enabled(struct ide_channel * channel) {
 279     return channel->drive_head.lba_mode;
 280 }
 281
 282
 283 /* Drive Commands */
 284 static void ide_raise_irq(struct ide_internal * ide, struct ide_channel * channel) {
 285     if (channel->ctrl_reg.irq_disable == 0) {
 286         //        PrintError("Raising IDE Interrupt %d\n", channel->irq);
 287         channel->dma_status.int_gen = 1;
 288         v3_raise_irq(ide->vm, channel->irq);
 289     }
 290 }
 291
 292
 293 static void drive_reset(struct ide_drive * drive) {
 294     drive->sector_count = 0x01;
 295     drive->sector_num = 0x01;
 296
 297     PrintDebug("Resetting drive %s\n", drive->model);
 298
 299     if (drive->drive_type == BLOCK_CDROM) {
 300         drive->cylinder = 0xeb14;
 301     } else {
 302         drive->cylinder = 0x0000;
 303         //drive->hd_state.accessed = 0;
 304     }
 305
 306
 307     memset(drive->data_buf, 0, sizeof(drive->data_buf));
 308     drive->transfer_index = 0;
 309
 310     // Send the reset signal to the connected device callbacks
 311     //     channel->drives[0].reset();
 312     //    channel->drives[1].reset();
 313 }
 314
 315 static void channel_reset(struct ide_channel * channel) {
 316
 317     // set busy and seek complete flags
 318     channel->status.val = 0x90;
 319
 320     // Clear errors
 321     channel->error_reg.val = 0x01;
 322
 323     // clear commands
 324     channel->cmd_reg = 0x00;
 325
 326     channel->ctrl_reg.irq_disable = 0;
 327 }
 328
 329 static void channel_reset_complete(struct ide_channel * channel) {
 330     channel->status.busy = 0;
 331     channel->status.ready = 1;
 332
 333     channel->drive_head.head_num = 0;
 334
 335     drive_reset(&(channel->drives[0]));
 336     drive_reset(&(channel->drives[1]));
 337 }
 338
 339
 340 static void ide_abort_command(struct ide_internal * ide, struct ide_channel * channel) {
 341     channel->status.val = 0x41; // Error + ready
 342     channel->error_reg.val = 0x04; // No idea...
 343
 344     ide_raise_irq(ide, channel);
 345 }
 346
 347
 348 static int dma_read(struct guest_info * core, struct ide_internal * ide, struct ide_channel * channel);
 349 static int dma_write(struct guest_info * core, struct ide_internal * ide, struct ide_channel * channel);
 350
 351
 352 /* ATAPI functions */
 353 #include "atapi.h"
 354
 355 /* ATA functions */
 356 #include "ata.h"
 357
 358
 359 #ifdef CONFIG_DEBUG_IDE
 360 static void print_prd_table(struct ide_internal * ide, struct ide_channel * channel) {
 361     struct ide_dma_prd prd_entry;
 362     int index = 0;
 363
 364     PrintDebug("Dumping PRD table\n");
 365
 366     while (1) {
 367         uint32_t prd_entry_addr = channel->dma_prd_addr + (sizeof(struct ide_dma_prd) * index);
 368         int ret;
 369
 370         ret = v3_read_gpa_memory(&(ide->vm->cores[0]), prd_entry_addr, sizeof(struct ide_dma_prd), (void *)&prd_entry);
 371
 372         if (ret != sizeof(struct ide_dma_prd)) {
 373             PrintError("Could not read PRD\n");
 374             return;
 375         }
 376
 377         PrintDebug("\tPRD Addr: %x, PRD Len: %d, EOT: %d\n",
 378                    prd_entry.base_addr, prd_entry.size, prd_entry.end_of_table);
 379
 380         if (prd_entry.end_of_table) {
 381             break;
 382         }
 383
 384         index++;
 385     }
 386
 387     return;
 388 }
 389 #endif
 390
 391 /* IO Operations */
 392 static int dma_read(struct guest_info * core, struct ide_internal * ide, struct ide_channel * channel) {
 393     struct ide_drive * drive = get_selected_drive(channel);
 394     // This is at top level scope to do the EOT test at the end
 395     struct ide_dma_prd prd_entry = {};
 396     uint_t bytes_left = drive->transfer_length;
 397
 398     // Read in the data buffer....
 399     // Read a sector/block at a time until the prd entry is full.
 400
 401 #ifdef CONFIG_DEBUG_IDE
 402     print_prd_table(ide, channel);
 403 #endif
 404
 405     PrintDebug("DMA read for %d bytes\n", bytes_left);
 406
 407     // Loop through the disk data
 408     while (bytes_left > 0) {
 409         uint32_t prd_entry_addr = channel->dma_prd_addr + (sizeof(struct ide_dma_prd) * channel->dma_tbl_index);
 410         uint_t prd_bytes_left = 0;
 411         uint_t prd_offset = 0;
 412         int ret;
 413
 414         PrintDebug("PRD table address = %x\n", channel->dma_prd_addr);
 415
 416         ret = v3_read_gpa_memory(core, prd_entry_addr, sizeof(struct ide_dma_prd), (void *)&prd_entry);
 417
 418         if (ret != sizeof(struct ide_dma_prd)) {
 419             PrintError("Could not read PRD\n");
 420             return -1;
 421         }
 422
 423         PrintDebug("PRD Addr: %x, PRD Len: %d, EOT: %d\n",
 424                    prd_entry.base_addr, prd_entry.size, prd_entry.end_of_table);
 425
 426         // loop through the PRD data....
 427
 428         prd_bytes_left = prd_entry.size;
 429
 430
 431         while (prd_bytes_left > 0) {
 432             uint_t bytes_to_write = 0;
 433
 434             if (drive->drive_type == BLOCK_DISK) {
 435                 bytes_to_write = (prd_bytes_left > HD_SECTOR_SIZE) ? HD_SECTOR_SIZE : prd_bytes_left;
 436
 437
 438                 if (ata_read(ide, channel, drive->data_buf, 1) == -1) {
 439                     PrintError("Failed to read next disk sector\n");
 440                     return -1;
 441                 }
 442             } else if (drive->drive_type == BLOCK_CDROM) {
 443                 if (atapi_cmd_is_data_op(drive->cd_state.atapi_cmd)) {
 444                     bytes_to_write = (prd_bytes_left > ATAPI_BLOCK_SIZE) ? ATAPI_BLOCK_SIZE : prd_bytes_left;
 445
 446                     if (atapi_read_chunk(ide, channel) == -1) {
 447                         PrintError("Failed to read next disk sector\n");
 448                         return -1;
 449                     }
 450                 } else {
 451                     PrintDebug("DMA of command packet\n");
 452                     PrintError("How does this work???\n");
 453                     return -1;
 454                     bytes_to_write = (prd_bytes_left > bytes_left) ? bytes_left : prd_bytes_left;
 455                     prd_bytes_left = bytes_to_write;
 456                 }
 457             }
 458
 459             PrintDebug("Writing DMA data to guest Memory ptr=%p, len=%d\n",
 460                        (void *)(addr_t)(prd_entry.base_addr + prd_offset), bytes_to_write);
 461
 462             drive->current_lba++;
 463
 464             ret = v3_write_gpa_memory(core, prd_entry.base_addr + prd_offset, bytes_to_write, drive->data_buf);
 465
 466             if (ret != bytes_to_write) {
 467                 PrintError("Failed to copy data into guest memory... (ret=%d)\n", ret);
 468                 return -1;
 469             }
 470
 471             PrintDebug("\t DMA ret=%d, (prd_bytes_left=%d) (bytes_left=%d)\n", ret, prd_bytes_left, bytes_left);
 472
 473             drive->transfer_index += ret;
 474             prd_bytes_left -= ret;
 475             prd_offset += ret;
 476             bytes_left -= ret;
 477         }
 478
 479         channel->dma_tbl_index++;
 480
 481         if (drive->drive_type == BLOCK_DISK) {
 482             if (drive->transfer_index % HD_SECTOR_SIZE) {
 483                 PrintError("We currently don't handle sectors that span PRD descriptors\n");
 484                 return -1;
 485             }
 486         } else if (drive->drive_type == BLOCK_CDROM) {
 487             if (atapi_cmd_is_data_op(drive->cd_state.atapi_cmd)) {
 488                 if (drive->transfer_index % ATAPI_BLOCK_SIZE) {
 489                     PrintError("We currently don't handle ATAPI BLOCKS that span PRD descriptors\n");
 490                     PrintError("transfer_index=%d, transfer_length=%d\n",
 491                                drive->transfer_index, drive->transfer_length);
 492                     return -1;
 493                 }
 494             }
 495         }
 496
 497
 498         if ((prd_entry.end_of_table == 1) && (bytes_left > 0)) {
 499             PrintError("DMA table not large enough for data transfer...\n");
 500             return -1;
 501         }
 502     }
 503
 504     /*
 505       drive->irq_flags.io_dir = 1;
 506       drive->irq_flags.c_d = 1;
 507       drive->irq_flags.rel = 0;
 508     */
 509
 510
 511     // Update to the next PRD entry
 512
 513     // set DMA status
 514
 515     if (prd_entry.end_of_table) {
 516         channel->status.busy = 0;
 517         channel->status.ready = 1;
 518         channel->status.data_req = 0;
 519         channel->status.error = 0;
 520         channel->status.seek_complete = 1;
 521
 522         channel->dma_status.active = 0;
 523         channel->dma_status.err = 0;
 524     }
 525
 526     ide_raise_irq(ide, channel);
 527
 528     return 0;
 529 }
 530
 531
 532 static int dma_write(struct guest_info * core, struct ide_internal * ide, struct ide_channel * channel) {
 533     struct ide_drive * drive = get_selected_drive(channel);
 534     // This is at top level scope to do the EOT test at the end
 535     struct ide_dma_prd prd_entry = {};
 536     uint_t bytes_left = drive->transfer_length;
 537
 538
 539     PrintDebug("DMA write from %d bytes\n", bytes_left);
 540
 541     // Loop through disk data
 542     while (bytes_left > 0) {
 543         uint32_t prd_entry_addr = channel->dma_prd_addr + (sizeof(struct ide_dma_prd) * channel->dma_tbl_index);
 544         uint_t prd_bytes_left = 0;
 545         uint_t prd_offset = 0;
 546         int ret;
 547
 548         PrintDebug("PRD Table address = %x\n", channel->dma_prd_addr);
 549
 550         ret = v3_read_gpa_memory(core, prd_entry_addr, sizeof(struct ide_dma_prd), (void *)&prd_entry);
 551
 552         if (ret != sizeof(struct ide_dma_prd)) {
 553             PrintError("Could not read PRD\n");
 554             return -1;
 555         }
 556
 557         PrintDebug("PRD Addr: %x, PRD Len: %d, EOT: %d\n",
 558                    prd_entry.base_addr, prd_entry.size, prd_entry.end_of_table);
 559
 560         prd_bytes_left = prd_entry.size;
 561
 562         while (prd_bytes_left > 0) {
 563             uint_t bytes_to_write = 0;
 564
 565
 566             bytes_to_write = (prd_bytes_left > HD_SECTOR_SIZE) ? HD_SECTOR_SIZE : prd_bytes_left;
 567
 568
 569             ret = v3_read_gpa_memory(core, prd_entry.base_addr + prd_offset, bytes_to_write, drive->data_buf);
 570
 571             if (ret != bytes_to_write) {
 572                 PrintError("Faild to copy data from guest memory... (ret=%d)\n", ret);
 573                 return -1;
 574             }
 575
 576             PrintDebug("\t DMA ret=%d (prd_bytes_left=%d) (bytes_left=%d)\n", ret, prd_bytes_left, bytes_left);
 577
 578
 579             if (ata_write(ide, channel, drive->data_buf, 1) == -1) {
 580                 PrintError("Failed to write data to disk\n");
 581                 return -1;
 582             }
 583
 584             drive->current_lba++;
 585
 586             drive->transfer_index += ret;
 587             prd_bytes_left -= ret;
 588             prd_offset += ret;
 589             bytes_left -= ret;
 590         }
 591
 592         channel->dma_tbl_index++;
 593
 594         if (drive->transfer_index % HD_SECTOR_SIZE) {
 595             PrintError("We currently don't handle sectors that span PRD descriptors\n");
 596             return -1;
 597         }
 598
 599         if ((prd_entry.end_of_table == 1) && (bytes_left > 0)) {
 600             PrintError("DMA table not large enough for data transfer...\n");
 601             return -1;
 602         }
 603     }
 604
 605     if (prd_entry.end_of_table) {
 606         channel->status.busy = 0;
 607         channel->status.ready = 1;
 608         channel->status.data_req = 0;
 609         channel->status.error = 0;
 610         channel->status.seek_complete = 1;
 611
 612         channel->dma_status.active = 0;
 613         channel->dma_status.err = 0;
 614     }
 615
 616     ide_raise_irq(ide, channel);
 617
 618     return 0;
 619 }
 620
 621
 622
 623 #define DMA_CMD_PORT      0x00
 624 #define DMA_STATUS_PORT   0x02
 625 #define DMA_PRD_PORT0     0x04
 626 #define DMA_PRD_PORT1     0x05
 627 #define DMA_PRD_PORT2     0x06
 628 #define DMA_PRD_PORT3     0x07
 629
 630 #define DMA_CHANNEL_FLAG  0x08
 631
 632 static int write_dma_port(struct guest_info * core, ushort_t port, void * src, uint_t length, void * private_data) {
 633     struct ide_internal * ide = (struct ide_internal *)private_data;
 634     uint16_t port_offset = port & (DMA_CHANNEL_FLAG - 1);
 635     uint_t channel_flag = (port & DMA_CHANNEL_FLAG) >> 3;
 636     struct ide_channel * channel = &(ide->channels[channel_flag]);
 637
 638     PrintDebug("IDE: Writing DMA Port %x (%s) (val=%x) (len=%d) (channel=%d)\n",
 639                port, dma_port_to_str(port_offset), *(uint32_t *)src, length, channel_flag);
 640
 641     switch (port_offset) {
 642         case DMA_CMD_PORT:
 643             channel->dma_cmd.val = *(uint8_t *)src;
 644
 645             if (channel->dma_cmd.start == 0) {
 646                 channel->dma_tbl_index = 0;
 647             } else {
 648                 channel->dma_status.active = 1;
 649
 650                 if (channel->dma_cmd.read == 1) {
 651                     // DMA Read
 652                     if (dma_read(core, ide, channel) == -1) {
 653                         PrintError("Failed DMA Read\n");
 654                         return -1;
 655                     }
 656                 } else {
 657                     // DMA write
 658                     if (dma_write(core, ide, channel) == -1) {
 659                         PrintError("Failed DMA Write\n");
 660                         return -1;
 661                     }
 662                 }
 663
 664                 channel->dma_cmd.val &= 0x09;
 665             }
 666
 667             break;
 668
 669         case DMA_STATUS_PORT: {
 670             uint8_t val = *(uint8_t *)src;
 671
 672             if (length != 1) {
 673                 PrintError("Invalid read length for DMA status port\n");
 674                 return -1;
 675             }
 676
 677             // weirdness
 678             channel->dma_status.val = ((val & 0x60) |
 679                                        (channel->dma_status.val & 0x01) |
 680                                        (channel->dma_status.val & ~val & 0x06));
 681
 682             break;
 683         }
 684         case DMA_PRD_PORT0:
 685         case DMA_PRD_PORT1:
 686         case DMA_PRD_PORT2:
 687         case DMA_PRD_PORT3: {
 688             uint_t addr_index = port_offset & 0x3;
 689             uint8_t * addr_buf = (uint8_t *)&(channel->dma_prd_addr);
 690             int i = 0;
 691
 692             if (addr_index + length > 4) {
 693                 PrintError("DMA Port space overrun port=%x len=%d\n", port_offset, length);
 694                 return -1;
 695             }
 696
 697             for (i = 0; i < length; i++) {
 698                 addr_buf[addr_index + i] = *((uint8_t *)src + i);
 699             }
 700
 701             PrintDebug("Writing PRD Port %x (val=%x)\n", port_offset, channel->dma_prd_addr);
 702
 703             break;
 704         }
 705         default:
 706             PrintError("IDE: Invalid DMA Port (%s)\n", dma_port_to_str(port_offset));
 707             return -1;
 708     }
 709
 710     return length;
 711 }
 712
 713
 714 static int read_dma_port(struct guest_info * core, ushort_t port, void * dst, uint_t length, void * private_data) {
 715     struct ide_internal * ide = (struct ide_internal *)private_data;
 716     uint16_t port_offset = port & (DMA_CHANNEL_FLAG - 1);
 717     uint_t channel_flag = (port & DMA_CHANNEL_FLAG) >> 3;
 718     struct ide_channel * channel = &(ide->channels[channel_flag]);
 719
 720     PrintDebug("Reading DMA port %d (%x) (channel=%d)\n", port, port, channel_flag);
 721
 722     switch (port_offset) {
 723         case DMA_CMD_PORT:
 724             *(uint8_t *)dst = channel->dma_cmd.val;
 725             break;
 726
 727         case DMA_STATUS_PORT:
 728             if (length != 1) {
 729                 PrintError("Invalid read length for DMA status port\n");
 730                 return -1;
 731             }
 732
 733             *(uint8_t *)dst = channel->dma_status.val;
 734             break;
 735
 736         case DMA_PRD_PORT0:
 737         case DMA_PRD_PORT1:
 738         case DMA_PRD_PORT2:
 739         case DMA_PRD_PORT3: {
 740             uint_t addr_index = port_offset & 0x3;
 741             uint8_t * addr_buf = (uint8_t *)&(channel->dma_prd_addr);
 742             int i = 0;
 743
 744             if (addr_index + length > 4) {
 745                 PrintError("DMA Port space overrun port=%x len=%d\n", port_offset, length);
 746                 return -1;
 747             }
 748
 749             for (i = 0; i < length; i++) {
 750                 *((uint8_t *)dst + i) = addr_buf[addr_index + i];
 751             }
 752
 753             break;
 754         }
 755         default:
 756             PrintError("IDE: Invalid DMA Port (%s)\n", dma_port_to_str(port_offset));
 757             return -1;
 758     }
 759
 760     PrintDebug("\tval=%x (len=%d)\n", *(uint32_t *)dst, length);
 761
 762     return length;
 763 }
 764
 765
 766
 767 static int write_cmd_port(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) {
 768     struct ide_internal * ide = priv_data;
 769     struct ide_channel * channel = get_selected_channel(ide, port);
 770     struct ide_drive * drive = get_selected_drive(channel);
 771
 772     if (length != 1) {
 773         PrintError("Invalid Write Length on IDE command Port %x\n", port);
 774         return -1;
 775     }
 776
 777     PrintDebug("IDE: Writing Command Port %x (%s) (val=%x)\n", port, io_port_to_str(port), *(uint8_t *)src);
 778
 779     channel->cmd_reg = *(uint8_t *)src;
 780
 781     switch (channel->cmd_reg) {
 782
 783         case 0xa1: // ATAPI Identify Device Packet
 784             if (drive->drive_type != BLOCK_CDROM) {
 785                 drive_reset(drive);
 786
 787                 // JRL: Should we abort here?
 788                 ide_abort_command(ide, channel);
 789             } else {
 790
 791                 atapi_identify_device(drive);
 792
 793                 channel->error_reg.val = 0;
 794                 channel->status.val = 0x58; // ready, data_req, seek_complete
 795
 796                 ide_raise_irq(ide, channel);
 797             }
 798             break;
 799         case 0xec: // Identify Device
 800             if (drive->drive_type != BLOCK_DISK) {
 801                 drive_reset(drive);
 802
 803                 // JRL: Should we abort here?
 804                 ide_abort_command(ide, channel);
 805             } else {
 806                 ata_identify_device(drive);
 807
 808                 channel->error_reg.val = 0;
 809                 channel->status.val = 0x58;
 810
 811                 ide_raise_irq(ide, channel);
 812             }
 813             break;
 814
 815         case 0xa0: // ATAPI Command Packet
 816             if (drive->drive_type != BLOCK_CDROM) {
 817                 ide_abort_command(ide, channel);
 818             }
 819
 820             drive->sector_count = 1;
 821
 822             channel->status.busy = 0;
 823             channel->status.write_fault = 0;
 824             channel->status.data_req = 1;
 825             channel->status.error = 0;
 826
 827             // reset the data buffer...
 828             drive->transfer_length = ATAPI_PACKET_SIZE;
 829             drive->transfer_index = 0;
 830
 831             break;
 832
 833         case 0x20: // Read Sectors with Retry
 834         case 0x21: // Read Sectors without Retry
 835             drive->hd_state.cur_sector_num = 1;
 836
 837             if (ata_read_sectors(ide, channel) == -1) {
 838                 PrintError("Error reading sectors\n");
 839                 return -1;
 840             }
 841             break;
 842
 843         case 0x24: // Read Sectors Extended
 844             drive->hd_state.cur_sector_num = 1;
 845
 846             if (ata_read_sectors_ext(ide, channel) == -1) {
 847                 PrintError("Error reading extended sectors\n");
 848                 return -1;
 849             }
 850             break;
 851
 852         case 0xc8: // Read DMA with retry
 853         case 0xc9: { // Read DMA
 854             uint32_t sect_cnt = (drive->sector_count == 0) ? 256 : drive->sector_count;
 855
 856             if (ata_get_lba(ide, channel, &(drive->current_lba)) == -1) {
 857                 ide_abort_command(ide, channel);
 858                 return 0;
 859             }
 860
 861             drive->hd_state.cur_sector_num = 1;
 862
 863             drive->transfer_length = sect_cnt * HD_SECTOR_SIZE;
 864             drive->transfer_index = 0;
 865
 866             if (channel->dma_status.active == 1) {
 867                 // DMA Read
 868                 if (dma_read(core, ide, channel) == -1) {
 869                     PrintError("Failed DMA Read\n");
 870                     return -1;
 871                 }
 872             }
 873             break;
 874         }
 875
 876         case 0xca: { // Write DMA
 877             uint32_t sect_cnt = (drive->sector_count == 0) ? 256 : drive->sector_count;
 878
 879             if (ata_get_lba(ide, channel, &(drive->current_lba)) == -1) {
 880                 ide_abort_command(ide, channel);
 881                 return 0;
 882             }
 883
 884             drive->hd_state.cur_sector_num = 1;
 885
 886             drive->transfer_length = sect_cnt * HD_SECTOR_SIZE;
 887             drive->transfer_index = 0;
 888
 889             if (channel->dma_status.active == 1) {
 890                 // DMA Write
 891                 if (dma_write(core, ide, channel) == -1) {
 892                     PrintError("Failed DMA Write\n");
 893                     return -1;
 894                 }
 895             }
 896             break;
 897         }
 898         case 0xe0: // Standby Now 1
 899         case 0xe1: // Set Idle Immediate
 900         case 0xe2: // Standby
 901         case 0xe3: // Set Idle 1
 902         case 0xe6: // Sleep Now 1
 903         case 0x94: // Standby Now 2
 904         case 0x95: // Idle Immediate (CFA)
 905         case 0x96: // Standby 2
 906         case 0x97: // Set idle 2
 907         case 0x99: // Sleep Now 2
 908             channel->status.val = 0;
 909             channel->status.ready = 1;
 910             ide_raise_irq(ide, channel);
 911             break;
 912
 913         case 0xef: // Set Features
 914             // Prior to this the features register has been written to.
 915             // This command tells the drive to check if the new value is supported (the value is drive specific)
 916             // Common is that bit0=DMA enable
 917             // If valid the drive raises an interrupt, if not it aborts.
 918
 919             // Do some checking here...
 920
 921             channel->status.busy = 0;
 922             channel->status.write_fault = 0;
 923             channel->status.error = 0;
 924             channel->status.ready = 1;
 925             channel->status.seek_complete = 1;
 926
 927             ide_raise_irq(ide, channel);
 928             break;
 929
 930         case 0x91:  // Initialize Drive Parameters
 931         case 0x10:  // recalibrate?
 932             channel->status.error = 0;
 933             channel->status.ready = 1;
 934             channel->status.seek_complete = 1;
 935             ide_raise_irq(ide, channel);
 936             break;
 937         case 0xc6: { // Set multiple mode (IDE Block mode)
 938             // This makes the drive transfer multiple sectors before generating an interrupt
 939             uint32_t tmp_sect_num = drive->sector_num; // GCC SUCKS
 940
 941             if (tmp_sect_num > MAX_MULT_SECTORS) {
 942                 ide_abort_command(ide, channel);
 943                 break;
 944             }
 945
 946             if (drive->sector_count == 0) {
 947                 drive->hd_state.mult_sector_num= 1;
 948             } else {
 949                 drive->hd_state.mult_sector_num = drive->sector_count;
 950             }
 951
 952             channel->status.ready = 1;
 953             channel->status.error = 0;
 954
 955             ide_raise_irq(ide, channel);
 956
 957             break;
 958         }
 959         case 0xc4:  // read multiple sectors
 960             drive->hd_state.cur_sector_num = drive->hd_state.mult_sector_num;
 961         default:
 962             PrintError("Unimplemented IDE command (%x)\n", channel->cmd_reg);
 963             return -1;
 964     }
 965
 966     return length;
 967 }
 968
 969
 970 static int write_data_port(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) {
 971     struct ide_internal * ide = priv_data;
 972     struct ide_channel * channel = get_selected_channel(ide, port);
 973     struct ide_drive * drive = get_selected_drive(channel);
 974
 975     //    PrintDebug("IDE: Writing Data Port %x (val=%x, len=%d)\n",
 976     //         port, *(uint32_t *)src, length);
 977
 978     memcpy(drive->data_buf + drive->transfer_index, src, length);
 979     drive->transfer_index += length;
 980
 981     // Transfer is complete, dispatch the command
 982     if (drive->transfer_index >= drive->transfer_length) {
 983         switch (channel->cmd_reg) {
 984             case 0x30: // Write Sectors
 985                 PrintError("Writing Data not yet implemented\n");
 986                 return -1;
 987
 988             case 0xa0: // ATAPI packet command
 989                 if (atapi_handle_packet(core, ide, channel) == -1) {
 990                     PrintError("Error handling ATAPI packet\n");
 991                     return -1;
 992                 }
 993                 break;
 994             default:
 995                 PrintError("Unhandld IDE Command %x\n", channel->cmd_reg);
 996                 return -1;
 997         }
 998     }
 999
1000     return length;
1001 }
1002
1003
1004 static int read_hd_data(uint8_t * dst, uint_t length, struct ide_internal * ide, struct ide_channel * channel) {
1005     struct ide_drive * drive = get_selected_drive(channel);
1006     int data_offset = drive->transfer_index % HD_SECTOR_SIZE;
1007
1008
1009
1010     if (drive->transfer_index >= drive->transfer_length) {
1011         PrintError("Buffer overrun... (xfer_len=%d) (cur_idx=%x) (post_idx=%d)\n",
1012                    drive->transfer_length, drive->transfer_index,
1013                    drive->transfer_index + length);
1014         return -1;
1015     }
1016
1017
1018     if ((data_offset == 0) && (drive->transfer_index > 0)) {
1019         drive->current_lba++;
1020
1021         if (ata_read(ide, channel, drive->data_buf, 1) == -1) {
1022             PrintError("Could not read next disk sector\n");
1023             return -1;
1024         }
1025     }
1026
1027     /*
1028       PrintDebug("Reading HD Data (Val=%x), (len=%d) (offset=%d)\n",
1029       *(uint32_t *)(drive->data_buf + data_offset),
1030       length, data_offset);
1031     */
1032     memcpy(dst, drive->data_buf + data_offset, length);
1033
1034     drive->transfer_index += length;
1035
1036
1037     /* This is the trigger for interrupt injection.
1038      * For read single sector commands we interrupt after every sector
1039      * For multi sector reads we interrupt only at end of the cluster size (mult_sector_num)
1040      * cur_sector_num is configured depending on the operation we are currently running
1041      * We also trigger an interrupt if this is the last byte to transfer, regardless of sector count
1042      */
1043     if (((drive->transfer_index % (HD_SECTOR_SIZE * drive->hd_state.cur_sector_num)) == 0) ||
1044         (drive->transfer_index == drive->transfer_length)) {
1045         if (drive->transfer_index < drive->transfer_length) {
1046             // An increment is complete, but there is still more data to be transferred...
1047             PrintDebug("Integral Complete, still transferring more sectors\n");
1048             channel->status.data_req = 1;
1049
1050             drive->irq_flags.c_d = 0;
1051         } else {
1052             PrintDebug("Final Sector Transferred\n");
1053             // This was the final read of the request
1054             channel->status.data_req = 0;
1055
1056
1057             drive->irq_flags.c_d = 1;
1058             drive->irq_flags.rel = 0;
1059         }
1060
1061         channel->status.ready = 1;
1062         drive->irq_flags.io_dir = 1;
1063         channel->status.busy = 0;
1064
1065         ide_raise_irq(ide, channel);
1066     }
1067
1068
1069     return length;
1070 }
1071
1072
1073
1074 static int read_cd_data(uint8_t * dst, uint_t length, struct ide_internal * ide, struct ide_channel * channel) {
1075     struct ide_drive * drive = get_selected_drive(channel);
1076     int data_offset = drive->transfer_index % ATAPI_BLOCK_SIZE;
1077     int req_offset = drive->transfer_index % drive->req_len;
1078
1079     if (drive->cd_state.atapi_cmd != 0x28) {
1080         PrintDebug("IDE: Reading CD Data (len=%d) (req_len=%d)\n", length, drive->req_len);
1081     }
1082
1083     if (drive->transfer_index >= drive->transfer_length) {
1084         PrintError("Buffer Overrun... (xfer_len=%d) (cur_idx=%d) (post_idx=%d)\n",
1085                    drive->transfer_length, drive->transfer_index,
1086                    drive->transfer_index + length);
1087         return -1;
1088     }
1089
1090
1091     if ((data_offset == 0) && (drive->transfer_index > 0)) {
1092         if (atapi_update_data_buf(ide, channel) == -1) {
1093             PrintError("Could not update CDROM data buffer\n");
1094             return -1;
1095         }
1096     }
1097
1098     memcpy(dst, drive->data_buf + data_offset, length);
1099
1100     drive->transfer_index += length;
1101
1102
1103     // Should the req_offset be recalculated here?????
1104     if ((req_offset == 0) && (drive->transfer_index > 0)) {
1105         if (drive->transfer_index < drive->transfer_length) {
1106             // An increment is complete, but there is still more data to be transferred...
1107
1108             channel->status.data_req = 1;
1109
1110             drive->irq_flags.c_d = 0;
1111
1112             // Update the request length in the cylinder regs
1113             if (atapi_update_req_len(ide, channel, drive->transfer_length - drive->transfer_index) == -1) {
1114                 PrintError("Could not update request length after completed increment\n");
1115                 return -1;
1116             }
1117         } else {
1118             // This was the final read of the request
1119             channel->status.data_req = 0;
1120             channel->status.ready = 1;
1121
1122             drive->irq_flags.c_d = 1;
1123             drive->irq_flags.rel = 0;
1124         }
1125
1126         drive->irq_flags.io_dir = 1;
1127         channel->status.busy = 0;
1128
1129         ide_raise_irq(ide, channel);
1130     }
1131
1132     return length;
1133 }
1134
1135
1136 static int read_drive_id( uint8_t * dst, uint_t length, struct ide_internal * ide, struct ide_channel * channel) {
1137     struct ide_drive * drive = get_selected_drive(channel);
1138
1139     channel->status.busy = 0;
1140     channel->status.ready = 1;
1141     channel->status.write_fault = 0;
1142     channel->status.seek_complete = 1;
1143     channel->status.corrected = 0;
1144     channel->status.error = 0;
1145
1146
1147     memcpy(dst, drive->data_buf + drive->transfer_index, length);
1148     drive->transfer_index += length;
1149
1150     if (drive->transfer_index >= drive->transfer_length) {
1151         channel->status.data_req = 0;
1152     }
1153
1154     return length;
1155 }
1156
1157
1158 static int ide_read_data_port(struct guest_info * core, ushort_t port, void * dst, uint_t length, void * priv_data) {
1159     struct ide_internal * ide = priv_data;
1160     struct ide_channel * channel = get_selected_channel(ide, port);
1161     struct ide_drive * drive = get_selected_drive(channel);
1162
1163        PrintDebug("IDE: Reading Data Port %x (len=%d)\n", port, length);
1164
1165     if ((channel->cmd_reg == 0xec) ||
1166         (channel->cmd_reg == 0xa1)) {
1167         return read_drive_id((uint8_t *)dst, length, ide, channel);
1168     }
1169
1170     if (drive->drive_type == BLOCK_CDROM) {
1171         if (read_cd_data((uint8_t *)dst, length, ide, channel) == -1) {
1172             PrintError("IDE: Could not read CD Data\n");
1173             return -1;
1174         }
1175     } else if (drive->drive_type == BLOCK_DISK) {
1176         if (read_hd_data((uint8_t *)dst, length, ide, channel) == -1) {
1177             PrintError("IDE: Could not read HD Data\n");
1178             return -1;
1179         }
1180     } else {
1181         memset((uint8_t *)dst, 0, length);
1182     }
1183
1184     return length;
1185 }
1186
1187 static int write_port_std(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) {
1188     struct ide_internal * ide = priv_data;
1189     struct ide_channel * channel = get_selected_channel(ide, port);
1190     struct ide_drive * drive = get_selected_drive(channel);
1191
1192     if (length != 1) {
1193         PrintError("Invalid Write length on IDE port %x\n", port);
1194         return -1;
1195     }
1196
1197     PrintDebug("IDE: Writing Standard Port %x (%s) (val=%x)\n", port, io_port_to_str(port), *(uint8_t *)src);
1198
1199     switch (port) {
1200         // reset and interrupt enable
1201         case PRI_CTRL_PORT:
1202         case SEC_CTRL_PORT: {
1203             struct ide_ctrl_reg * tmp_ctrl = (struct ide_ctrl_reg *)src;
1204
1205             // only reset channel on a 0->1 reset bit transition
1206             if ((!channel->ctrl_reg.soft_reset) && (tmp_ctrl->soft_reset)) {
1207                 channel_reset(channel);
1208             } else if ((channel->ctrl_reg.soft_reset) && (!tmp_ctrl->soft_reset)) {
1209                 channel_reset_complete(channel);
1210             }
1211
1212             channel->ctrl_reg.val = tmp_ctrl->val;
1213             break;
1214         }
1215         case PRI_FEATURES_PORT:
1216         case SEC_FEATURES_PORT:
1217             channel->features.val = *(uint8_t *)src;
1218             break;
1219
1220         case PRI_SECT_CNT_PORT:
1221         case SEC_SECT_CNT_PORT:
1222             channel->drives[0].sector_count = *(uint8_t *)src;
1223             channel->drives[1].sector_count = *(uint8_t *)src;
1224             break;
1225
1226         case PRI_SECT_NUM_PORT:
1227         case SEC_SECT_NUM_PORT:
1228             channel->drives[0].sector_num = *(uint8_t *)src;
1229             channel->drives[1].sector_num = *(uint8_t *)src;
1230             break;
1231         case PRI_CYL_LOW_PORT:
1232         case SEC_CYL_LOW_PORT:
1233             channel->drives[0].cylinder_low = *(uint8_t *)src;
1234             channel->drives[1].cylinder_low = *(uint8_t *)src;
1235             break;
1236
1237         case PRI_CYL_HIGH_PORT:
1238         case SEC_CYL_HIGH_PORT:
1239             channel->drives[0].cylinder_high = *(uint8_t *)src;
1240             channel->drives[1].cylinder_high = *(uint8_t *)src;
1241             break;
1242
1243         case PRI_DRV_SEL_PORT:
1244         case SEC_DRV_SEL_PORT: {
1245             channel->drive_head.val = *(uint8_t *)src;
1246
1247             // make sure the reserved bits are ok..
1248             // JRL TODO: check with new ramdisk to make sure this is right...
1249             channel->drive_head.val |= 0xa0;
1250
1251             drive = get_selected_drive(channel);
1252
1253             // Selecting a non-present device is a no-no
1254             if (drive->drive_type == BLOCK_NONE) {
1255                 PrintDebug("Attempting to select a non-present drive\n");
1256                 channel->error_reg.abort = 1;
1257                 channel->status.error = 1;
1258             }
1259
1260             break;
1261         }
1262         default:
1263             PrintError("IDE: Write to unknown Port %x\n", port);
1264             return -1;
1265     }
1266     return length;
1267 }
1268
1269
1270 static int read_port_std(struct guest_info * core, ushort_t port, void * dst, uint_t length, void * priv_data) {
1271     struct ide_internal * ide = priv_data;
1272     struct ide_channel * channel = get_selected_channel(ide, port);
1273     struct ide_drive * drive = get_selected_drive(channel);
1274
1275     if (length != 1) {
1276         PrintError("Invalid Read length on IDE port %x\n", port);
1277         return -1;
1278     }
1279
1280     PrintDebug("IDE: Reading Standard Port %x (%s)\n", port, io_port_to_str(port));
1281
1282     if ((port == PRI_ADDR_REG_PORT) ||
1283         (port == SEC_ADDR_REG_PORT)) {
1284         // unused, return 0xff
1285         *(uint8_t *)dst = 0xff;
1286         return length;
1287     }
1288
1289
1290     // if no drive is present just return 0 + reserved bits
1291     if (drive->drive_type == BLOCK_NONE) {
1292         if ((port == PRI_DRV_SEL_PORT) ||
1293             (port == SEC_DRV_SEL_PORT)) {
1294             *(uint8_t *)dst = 0xa0;
1295         } else {
1296             *(uint8_t *)dst = 0;
1297         }
1298
1299         return length;
1300     }
1301
1302     switch (port) {
1303
1304         // This is really the error register.
1305         case PRI_FEATURES_PORT:
1306         case SEC_FEATURES_PORT:
1307             *(uint8_t *)dst = channel->error_reg.val;
1308             break;
1309
1310         case PRI_SECT_CNT_PORT:
1311         case SEC_SECT_CNT_PORT:
1312             *(uint8_t *)dst = drive->sector_count;
1313             break;
1314
1315         case PRI_SECT_NUM_PORT:
1316         case SEC_SECT_NUM_PORT:
1317             *(uint8_t *)dst = drive->sector_num;
1318             break;
1319
1320         case PRI_CYL_LOW_PORT:
1321         case SEC_CYL_LOW_PORT:
1322             *(uint8_t *)dst = drive->cylinder_low;
1323             break;
1324
1325
1326         case PRI_CYL_HIGH_PORT:
1327         case SEC_CYL_HIGH_PORT:
1328             *(uint8_t *)dst = drive->cylinder_high;
1329             break;
1330
1331         case PRI_DRV_SEL_PORT:
1332         case SEC_DRV_SEL_PORT:  // hard disk drive and head register 0x1f6
1333             *(uint8_t *)dst = channel->drive_head.val;
1334             break;
1335
1336         case PRI_CTRL_PORT:
1337         case SEC_CTRL_PORT:
1338         case PRI_CMD_PORT:
1339         case SEC_CMD_PORT:
1340             // Something about lowering interrupts here....
1341             *(uint8_t *)dst = channel->status.val;
1342             break;
1343
1344         default:
1345             PrintError("Invalid Port: %x\n", port);
1346             return -1;
1347     }
1348
1349     PrintDebug("\tVal=%x\n", *(uint8_t *)dst);
1350
1351     return length;
1352 }
1353
1354
1355
1356 static void init_drive(struct ide_drive * drive) {
1357
1358     drive->sector_count = 0x01;
1359     drive->sector_num = 0x01;
1360     drive->cylinder = 0x0000;
1361
1362     drive->drive_type = BLOCK_NONE;
1363
1364     memset(drive->model, 0, sizeof(drive->model));
1365
1366     drive->transfer_index = 0;
1367     drive->transfer_length = 0;
1368     memset(drive->data_buf, 0, sizeof(drive->data_buf));
1369
1370     drive->num_cylinders = 0;
1371     drive->num_heads = 0;
1372     drive->num_sectors = 0;
1373
1374
1375     drive->private_data = NULL;
1376     drive->ops = NULL;
1377 }
1378
1379 static void init_channel(struct ide_channel * channel) {
1380     int i = 0;
1381
1382     channel->error_reg.val = 0x01;
1383     channel->drive_head.val = 0x00;
1384     channel->status.val = 0x00;
1385     channel->cmd_reg = 0x00;
1386     channel->ctrl_reg.val = 0x08;
1387
1388
1389     channel->dma_cmd.val = 0;
1390     channel->dma_status.val = 0;
1391     channel->dma_prd_addr = 0;
1392     channel->dma_tbl_index = 0;
1393
1394     for (i = 0; i < 2; i++) {
1395         init_drive(&(channel->drives[i]));
1396     }
1397
1398 }
1399
1400
1401 static int pci_config_update(uint_t reg_num, void * src, uint_t length, void * private_data) {
1402     PrintDebug("PCI Config Update\n");
1403     /*
1404     struct ide_internal * ide = (struct ide_internal *)(private_data);
1405
1406     PrintDebug("\t\tInterupt register (Dev=%s), irq=%d\n", ide->ide_pci->name, ide->ide_pci->config_header.intr_line);
1407     */
1408
1409     return 0;
1410 }
1411
1412 static int init_ide_state(struct ide_internal * ide) {
1413     int i;
1414
1415     /*
1416      * Check if the PIIX 3 actually represents both IDE channels in a single PCI entry
1417      */
1418
1419     for (i = 0; i < 1; i++) {
1420         init_channel(&(ide->channels[i]));
1421
1422         // JRL: this is a terrible hack...
1423         ide->channels[i].irq = PRI_DEFAULT_IRQ + i;
1424     }
1425
1426
1427     return 0;
1428 }
1429
1430
1431
1432
1433 static int ide_free(struct vm_device * dev) {
1434     // unhook io ports....
1435
1436
1437     // deregister from PCI?
1438
1439
1440
1441     return 0;
1442 }
1443
1444
1445 static struct v3_device_ops dev_ops = {
1446     .free = ide_free,
1447
1448 };
1449
1450
1451
1452
1453 static int connect_fn(struct v3_vm_info * vm,
1454                       void * frontend_data,
1455                       struct v3_dev_blk_ops * ops,
1456                       v3_cfg_tree_t * cfg,
1457                       void * private_data) {
1458     struct ide_internal * ide  = (struct ide_internal *)(frontend_data);
1459     struct ide_channel * channel = NULL;
1460     struct ide_drive * drive = NULL;
1461
1462     char * bus_str = v3_cfg_val(cfg, "bus_num");
1463     char * drive_str = v3_cfg_val(cfg, "drive_num");
1464     char * type_str = v3_cfg_val(cfg, "type");
1465     char * model_str = v3_cfg_val(cfg, "model");
1466     uint_t bus_num = 0;
1467     uint_t drive_num = 0;
1468
1469
1470     if ((!type_str) || (!drive_str) || (!bus_str)) {
1471         PrintError("Incomplete IDE Configuration\n");
1472         return -1;
1473     }
1474
1475     bus_num = atoi(bus_str);
1476     drive_num = atoi(drive_str);
1477
1478     channel = &(ide->channels[bus_num]);
1479     drive = &(channel->drives[drive_num]);
1480
1481     if (drive->drive_type != BLOCK_NONE) {
1482         PrintError("Device slot (bus=%d, drive=%d) already occupied\n", bus_num, drive_num);
1483         return -1;
1484     }
1485
1486     strncpy(drive->model, model_str, sizeof(drive->model) - 1);
1487
1488     if (strcasecmp(type_str, "cdrom") == 0) {
1489         drive->drive_type = BLOCK_CDROM;
1490
1491         while (strlen((char *)(drive->model)) < 40) {
1492             strcat((char*)(drive->model), " ");
1493         }
1494
1495     } else if (strcasecmp(type_str, "hd") == 0) {
1496         drive->drive_type = BLOCK_DISK;
1497
1498         drive->hd_state.accessed = 0;
1499         drive->hd_state.mult_sector_num = 1;
1500
1501         drive->num_sectors = 63;
1502         drive->num_heads = 16;
1503         drive->num_cylinders = (ops->get_capacity(private_data) / HD_SECTOR_SIZE) / (drive->num_sectors * drive->num_heads);
1504     } else {
1505         PrintError("invalid IDE drive type\n");
1506         return -1;
1507     }
1508
1509     drive->ops = ops;
1510
1511     if (ide->ide_pci) {
1512         // Hardcode this for now, but its not a good idea....
1513         ide->ide_pci->config_space[0x41 + (bus_num * 2)] = 0x80;
1514     }
1515
1516     drive->private_data = private_data;
1517
1518     return 0;
1519 }
1520
1521
1522
1523
1524 static int ide_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
1525     struct ide_internal * ide  = NULL;
1526     char * dev_id = v3_cfg_val(cfg, "ID");
1527
1528     PrintDebug("IDE: Initializing IDE\n");
1529
1530     ide = (struct ide_internal *)V3_Malloc(sizeof(struct ide_internal));
1531
1532     if (ide == NULL) {
1533         PrintError("Error allocating IDE state\n");
1534         return -1;
1535     }
1536
1537     memset(ide, 0, sizeof(struct ide_internal));
1538
1539     ide->vm = vm;
1540
1541     ide->pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
1542
1543     if (ide->pci_bus != NULL) {
1544         struct vm_device * southbridge = v3_find_dev(vm, v3_cfg_val(cfg, "controller"));
1545
1546         if (!southbridge) {
1547             PrintError("Could not find southbridge\n");
1548             V3_Free(ide);
1549             return -1;
1550         }
1551
1552         ide->southbridge = (struct v3_southbridge *)(southbridge->private_data);
1553     }
1554
1555     PrintDebug("IDE: Creating IDE bus x 2\n");
1556
1557     struct vm_device * dev = v3_allocate_device(dev_id, &dev_ops, ide);
1558
1559     if (v3_attach_device(vm, dev) == -1) {
1560         PrintError("Could not attach device %s\n", dev_id);
1561         v3_free_device(dev);
1562         V3_Free(ide);
1563         return -1;
1564     }
1565
1566     if (init_ide_state(ide) == -1) {
1567         PrintError("Failed to initialize IDE state\n");
1568         v3_detach_device(dev);
1569         return -1;
1570     }
1571
1572     PrintDebug("Connecting to IDE IO ports\n");
1573
1574     v3_dev_hook_io(dev, PRI_DATA_PORT,
1575                    &ide_read_data_port, &write_data_port);
1576     v3_dev_hook_io(dev, PRI_FEATURES_PORT,
1577                    &read_port_std, &write_port_std);
1578     v3_dev_hook_io(dev, PRI_SECT_CNT_PORT,
1579                    &read_port_std, &write_port_std);
1580     v3_dev_hook_io(dev, PRI_SECT_NUM_PORT,
1581                    &read_port_std, &write_port_std);
1582     v3_dev_hook_io(dev, PRI_CYL_LOW_PORT,
1583                    &read_port_std, &write_port_std);
1584     v3_dev_hook_io(dev, PRI_CYL_HIGH_PORT,
1585                    &read_port_std, &write_port_std);
1586     v3_dev_hook_io(dev, PRI_DRV_SEL_PORT,
1587                    &read_port_std, &write_port_std);
1588     v3_dev_hook_io(dev, PRI_CMD_PORT,
1589                    &read_port_std, &write_cmd_port);
1590
1591     v3_dev_hook_io(dev, SEC_DATA_PORT,
1592                    &ide_read_data_port, &write_data_port);
1593     v3_dev_hook_io(dev, SEC_FEATURES_PORT,
1594                    &read_port_std, &write_port_std);
1595     v3_dev_hook_io(dev, SEC_SECT_CNT_PORT,
1596                    &read_port_std, &write_port_std);
1597     v3_dev_hook_io(dev, SEC_SECT_NUM_PORT,
1598                    &read_port_std, &write_port_std);
1599     v3_dev_hook_io(dev, SEC_CYL_LOW_PORT,
1600                    &read_port_std, &write_port_std);
1601     v3_dev_hook_io(dev, SEC_CYL_HIGH_PORT,
1602                    &read_port_std, &write_port_std);
1603     v3_dev_hook_io(dev, SEC_DRV_SEL_PORT,
1604                    &read_port_std, &write_port_std);
1605     v3_dev_hook_io(dev, SEC_CMD_PORT,
1606                    &read_port_std, &write_cmd_port);
1607
1608
1609     v3_dev_hook_io(dev, PRI_CTRL_PORT,
1610                    &read_port_std, &write_port_std);
1611
1612     v3_dev_hook_io(dev, SEC_CTRL_PORT,
1613                    &read_port_std, &write_port_std);
1614
1615
1616     v3_dev_hook_io(dev, SEC_ADDR_REG_PORT,
1617                    &read_port_std, &write_port_std);
1618
1619     v3_dev_hook_io(dev, PRI_ADDR_REG_PORT,
1620                    &read_port_std, &write_port_std);
1621
1622
1623
1624
1625     if (ide->pci_bus) {
1626         struct v3_pci_bar bars[6];
1627         struct v3_southbridge * southbridge = (struct v3_southbridge *)(ide->southbridge);
1628         struct pci_device * sb_pci = (struct pci_device *)(southbridge->southbridge_pci);
1629         struct pci_device * pci_dev = NULL;
1630         int i;
1631
1632         PrintDebug("Connecting IDE to PCI bus\n");
1633
1634         for (i = 0; i < 6; i++) {
1635             bars[i].type = PCI_BAR_NONE;
1636         }
1637
1638         bars[4].type = PCI_BAR_IO;
1639         //      bars[4].default_base_port = PRI_DEFAULT_DMA_PORT;
1640         bars[4].default_base_port = -1;
1641         bars[4].num_ports = 16;
1642
1643         bars[4].io_read = read_dma_port;
1644         bars[4].io_write = write_dma_port;
1645         bars[4].private_data = ide;
1646
1647         pci_dev = v3_pci_register_device(ide->pci_bus, PCI_STD_DEVICE, 0, sb_pci->dev_num, 1,
1648                                          "PIIX3_IDE", bars,
1649                                          pci_config_update, NULL, NULL, ide);
1650
1651         if (pci_dev == NULL) {
1652             PrintError("Failed to register IDE BUS %d with PCI\n", i);
1653             return -1;
1654         }
1655
1656         /* This is for CMD646 devices
1657            pci_dev->config_header.vendor_id = 0x1095;
1658            pci_dev->config_header.device_id = 0x0646;
1659            pci_dev->config_header.revision = 0x8f07;
1660         */
1661
1662         pci_dev->config_header.vendor_id = 0x8086;
1663         pci_dev->config_header.device_id = 0x7010;
1664         pci_dev->config_header.revision = 0x00;
1665
1666         pci_dev->config_header.prog_if = 0x80; // Master IDE device
1667         pci_dev->config_header.subclass = PCI_STORAGE_SUBCLASS_IDE;
1668         pci_dev->config_header.class = PCI_CLASS_STORAGE;
1669
1670         pci_dev->config_header.command = 0;
1671         pci_dev->config_header.status = 0x0280;
1672
1673         ide->ide_pci = pci_dev;
1674
1675
1676     }
1677
1678     if (v3_dev_add_blk_frontend(vm, dev_id, connect_fn, (void *)ide) == -1) {
1679         PrintError("Could not register %s as frontend\n", dev_id);
1680         v3_detach_device(dev);
1681         return -1;
1682     }
1683
1684
1685     PrintDebug("IDE Initialized\n");
1686
1687     return 0;
1688 }
1689
1690
1691 device_register("IDE", ide_init)
1692
1693
1694
1695
1696 int v3_ide_get_geometry(void * ide_data, int channel_num, int drive_num,
1697                         uint32_t * cylinders, uint32_t * heads, uint32_t * sectors) {
1698
1699     struct ide_internal * ide  = ide_data;
1700     struct ide_channel * channel = &(ide->channels[channel_num]);
1701     struct ide_drive * drive = &(channel->drives[drive_num]);
1702
1703     if (drive->drive_type == BLOCK_NONE) {
1704         return -1;
1705     }
1706
1707     *cylinders = drive->num_cylinders;
1708     *heads = drive->num_heads;
1709     *sectors = drive->num_sectors;
1710
1711     return 0;
1712 }