ide.c 45.1 KB
Newer Older
B
bellard 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276
/*
 * QEMU IDE disk and CD-ROM Emulator
 * 
 * Copyright (c) 2003 Fabrice Bellard
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "vl.h"

/* debug IDE devices */
//#define DEBUG_IDE
//#define DEBUG_IDE_ATAPI

/* Bits of HD_STATUS */
#define ERR_STAT		0x01
#define INDEX_STAT		0x02
#define ECC_STAT		0x04	/* Corrected error */
#define DRQ_STAT		0x08
#define SEEK_STAT		0x10
#define SRV_STAT		0x10
#define WRERR_STAT		0x20
#define READY_STAT		0x40
#define BUSY_STAT		0x80

/* Bits for HD_ERROR */
#define MARK_ERR		0x01	/* Bad address mark */
#define TRK0_ERR		0x02	/* couldn't find track 0 */
#define ABRT_ERR		0x04	/* Command aborted */
#define MCR_ERR			0x08	/* media change request */
#define ID_ERR			0x10	/* ID field not found */
#define MC_ERR			0x20	/* media changed */
#define ECC_ERR			0x40	/* Uncorrectable ECC error */
#define BBD_ERR			0x80	/* pre-EIDE meaning:  block marked bad */
#define ICRC_ERR		0x80	/* new meaning:  CRC error during transfer */

/* Bits of HD_NSECTOR */
#define CD			0x01
#define IO			0x02
#define REL			0x04
#define TAG_MASK		0xf8

#define IDE_CMD_RESET           0x04
#define IDE_CMD_DISABLE_IRQ     0x02

/* ATA/ATAPI Commands pre T13 Spec */
#define WIN_NOP				0x00
/*
 *	0x01->0x02 Reserved
 */
#define CFA_REQ_EXT_ERROR_CODE		0x03 /* CFA Request Extended Error Code */
/*
 *	0x04->0x07 Reserved
 */
#define WIN_SRST			0x08 /* ATAPI soft reset command */
#define WIN_DEVICE_RESET		0x08
/*
 *	0x09->0x0F Reserved
 */
#define WIN_RECAL			0x10
#define WIN_RESTORE			WIN_RECAL
/*
 *	0x10->0x1F Reserved
 */
#define WIN_READ			0x20 /* 28-Bit */
#define WIN_READ_ONCE			0x21 /* 28-Bit without retries */
#define WIN_READ_LONG			0x22 /* 28-Bit */
#define WIN_READ_LONG_ONCE		0x23 /* 28-Bit without retries */
#define WIN_READ_EXT			0x24 /* 48-Bit */
#define WIN_READDMA_EXT			0x25 /* 48-Bit */
#define WIN_READDMA_QUEUED_EXT		0x26 /* 48-Bit */
#define WIN_READ_NATIVE_MAX_EXT		0x27 /* 48-Bit */
/*
 *	0x28
 */
#define WIN_MULTREAD_EXT		0x29 /* 48-Bit */
/*
 *	0x2A->0x2F Reserved
 */
#define WIN_WRITE			0x30 /* 28-Bit */
#define WIN_WRITE_ONCE			0x31 /* 28-Bit without retries */
#define WIN_WRITE_LONG			0x32 /* 28-Bit */
#define WIN_WRITE_LONG_ONCE		0x33 /* 28-Bit without retries */
#define WIN_WRITE_EXT			0x34 /* 48-Bit */
#define WIN_WRITEDMA_EXT		0x35 /* 48-Bit */
#define WIN_WRITEDMA_QUEUED_EXT		0x36 /* 48-Bit */
#define WIN_SET_MAX_EXT			0x37 /* 48-Bit */
#define CFA_WRITE_SECT_WO_ERASE		0x38 /* CFA Write Sectors without erase */
#define WIN_MULTWRITE_EXT		0x39 /* 48-Bit */
/*
 *	0x3A->0x3B Reserved
 */
#define WIN_WRITE_VERIFY		0x3C /* 28-Bit */
/*
 *	0x3D->0x3F Reserved
 */
#define WIN_VERIFY			0x40 /* 28-Bit - Read Verify Sectors */
#define WIN_VERIFY_ONCE			0x41 /* 28-Bit - without retries */
#define WIN_VERIFY_EXT			0x42 /* 48-Bit */
/*
 *	0x43->0x4F Reserved
 */
#define WIN_FORMAT			0x50
/*
 *	0x51->0x5F Reserved
 */
#define WIN_INIT			0x60
/*
 *	0x61->0x5F Reserved
 */
#define WIN_SEEK			0x70 /* 0x70-0x7F Reserved */
#define CFA_TRANSLATE_SECTOR		0x87 /* CFA Translate Sector */
#define WIN_DIAGNOSE			0x90
#define WIN_SPECIFY			0x91 /* set drive geometry translation */
#define WIN_DOWNLOAD_MICROCODE		0x92
#define WIN_STANDBYNOW2			0x94
#define WIN_STANDBY2			0x96
#define WIN_SETIDLE2			0x97
#define WIN_CHECKPOWERMODE2		0x98
#define WIN_SLEEPNOW2			0x99
/*
 *	0x9A VENDOR
 */
#define WIN_PACKETCMD			0xA0 /* Send a packet command. */
#define WIN_PIDENTIFY			0xA1 /* identify ATAPI device	*/
#define WIN_QUEUED_SERVICE		0xA2
#define WIN_SMART			0xB0 /* self-monitoring and reporting */
#define CFA_ERASE_SECTORS       	0xC0
#define WIN_MULTREAD			0xC4 /* read sectors using multiple mode*/
#define WIN_MULTWRITE			0xC5 /* write sectors using multiple mode */
#define WIN_SETMULT			0xC6 /* enable/disable multiple mode */
#define WIN_READDMA_QUEUED		0xC7 /* read sectors using Queued DMA transfers */
#define WIN_READDMA			0xC8 /* read sectors using DMA transfers */
#define WIN_READDMA_ONCE		0xC9 /* 28-Bit - without retries */
#define WIN_WRITEDMA			0xCA /* write sectors using DMA transfers */
#define WIN_WRITEDMA_ONCE		0xCB /* 28-Bit - without retries */
#define WIN_WRITEDMA_QUEUED		0xCC /* write sectors using Queued DMA transfers */
#define CFA_WRITE_MULTI_WO_ERASE	0xCD /* CFA Write multiple without erase */
#define WIN_GETMEDIASTATUS		0xDA	
#define WIN_ACKMEDIACHANGE		0xDB /* ATA-1, ATA-2 vendor */
#define WIN_POSTBOOT			0xDC
#define WIN_PREBOOT			0xDD
#define WIN_DOORLOCK			0xDE /* lock door on removable drives */
#define WIN_DOORUNLOCK			0xDF /* unlock door on removable drives */
#define WIN_STANDBYNOW1			0xE0
#define WIN_IDLEIMMEDIATE		0xE1 /* force drive to become "ready" */
#define WIN_STANDBY             	0xE2 /* Set device in Standby Mode */
#define WIN_SETIDLE1			0xE3
#define WIN_READ_BUFFER			0xE4 /* force read only 1 sector */
#define WIN_CHECKPOWERMODE1		0xE5
#define WIN_SLEEPNOW1			0xE6
#define WIN_FLUSH_CACHE			0xE7
#define WIN_WRITE_BUFFER		0xE8 /* force write only 1 sector */
#define WIN_WRITE_SAME			0xE9 /* read ata-2 to use */
	/* SET_FEATURES 0x22 or 0xDD */
#define WIN_FLUSH_CACHE_EXT		0xEA /* 48-Bit */
#define WIN_IDENTIFY			0xEC /* ask drive to identify itself	*/
#define WIN_MEDIAEJECT			0xED
#define WIN_IDENTIFY_DMA		0xEE /* same as WIN_IDENTIFY, but DMA */
#define WIN_SETFEATURES			0xEF /* set special drive features */
#define EXABYTE_ENABLE_NEST		0xF0
#define WIN_SECURITY_SET_PASS		0xF1
#define WIN_SECURITY_UNLOCK		0xF2
#define WIN_SECURITY_ERASE_PREPARE	0xF3
#define WIN_SECURITY_ERASE_UNIT		0xF4
#define WIN_SECURITY_FREEZE_LOCK	0xF5
#define WIN_SECURITY_DISABLE		0xF6
#define WIN_READ_NATIVE_MAX		0xF8 /* return the native maximum address */
#define WIN_SET_MAX			0xF9
#define DISABLE_SEAGATE			0xFB

/* set to 1 set disable mult support */
#define MAX_MULT_SECTORS 8

/* ATAPI defines */

#define ATAPI_PACKET_SIZE 12

/* The generic packet command opcodes for CD/DVD Logical Units,
 * From Table 57 of the SFF8090 Ver. 3 (Mt. Fuji) draft standard. */
#define GPCMD_BLANK			    0xa1
#define GPCMD_CLOSE_TRACK		    0x5b
#define GPCMD_FLUSH_CACHE		    0x35
#define GPCMD_FORMAT_UNIT		    0x04
#define GPCMD_GET_CONFIGURATION		    0x46
#define GPCMD_GET_EVENT_STATUS_NOTIFICATION 0x4a
#define GPCMD_GET_PERFORMANCE		    0xac
#define GPCMD_INQUIRY			    0x12
#define GPCMD_LOAD_UNLOAD		    0xa6
#define GPCMD_MECHANISM_STATUS		    0xbd
#define GPCMD_MODE_SELECT_10		    0x55
#define GPCMD_MODE_SENSE_10		    0x5a
#define GPCMD_PAUSE_RESUME		    0x4b
#define GPCMD_PLAY_AUDIO_10		    0x45
#define GPCMD_PLAY_AUDIO_MSF		    0x47
#define GPCMD_PLAY_AUDIO_TI		    0x48
#define GPCMD_PLAY_CD			    0xbc
#define GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL  0x1e
#define GPCMD_READ_10			    0x28
#define GPCMD_READ_12			    0xa8
#define GPCMD_READ_CDVD_CAPACITY	    0x25
#define GPCMD_READ_CD			    0xbe
#define GPCMD_READ_CD_MSF		    0xb9
#define GPCMD_READ_DISC_INFO		    0x51
#define GPCMD_READ_DVD_STRUCTURE	    0xad
#define GPCMD_READ_FORMAT_CAPACITIES	    0x23
#define GPCMD_READ_HEADER		    0x44
#define GPCMD_READ_TRACK_RZONE_INFO	    0x52
#define GPCMD_READ_SUBCHANNEL		    0x42
#define GPCMD_READ_TOC_PMA_ATIP		    0x43
#define GPCMD_REPAIR_RZONE_TRACK	    0x58
#define GPCMD_REPORT_KEY		    0xa4
#define GPCMD_REQUEST_SENSE		    0x03
#define GPCMD_RESERVE_RZONE_TRACK	    0x53
#define GPCMD_SCAN			    0xba
#define GPCMD_SEEK			    0x2b
#define GPCMD_SEND_DVD_STRUCTURE	    0xad
#define GPCMD_SEND_EVENT		    0xa2
#define GPCMD_SEND_KEY			    0xa3
#define GPCMD_SEND_OPC			    0x54
#define GPCMD_SET_READ_AHEAD		    0xa7
#define GPCMD_SET_STREAMING		    0xb6
#define GPCMD_START_STOP_UNIT		    0x1b
#define GPCMD_STOP_PLAY_SCAN		    0x4e
#define GPCMD_TEST_UNIT_READY		    0x00
#define GPCMD_VERIFY_10			    0x2f
#define GPCMD_WRITE_10			    0x2a
#define GPCMD_WRITE_AND_VERIFY_10	    0x2e
/* This is listed as optional in ATAPI 2.6, but is (curiously) 
 * missing from Mt. Fuji, Table 57.  It _is_ mentioned in Mt. Fuji
 * Table 377 as an MMC command for SCSi devices though...  Most ATAPI
 * drives support it. */
#define GPCMD_SET_SPEED			    0xbb
/* This seems to be a SCSI specific CD-ROM opcode 
 * to play data at track/index */
#define GPCMD_PLAYAUDIO_TI		    0x48
/*
 * From MS Media Status Notification Support Specification. For
 * older drives only.
 */
#define GPCMD_GET_MEDIA_STATUS		    0xda

/* Mode page codes for mode sense/set */
#define GPMODE_R_W_ERROR_PAGE		0x01
#define GPMODE_WRITE_PARMS_PAGE		0x05
#define GPMODE_AUDIO_CTL_PAGE		0x0e
#define GPMODE_POWER_PAGE		0x1a
#define GPMODE_FAULT_FAIL_PAGE		0x1c
#define GPMODE_TO_PROTECT_PAGE		0x1d
#define GPMODE_CAPABILITIES_PAGE	0x2a
#define GPMODE_ALL_PAGES		0x3f
/* Not in Mt. Fuji, but in ATAPI 2.6 -- depricated now in favor
 * of MODE_SENSE_POWER_PAGE */
#define GPMODE_CDROM_PAGE		0x0d

#define ATAPI_INT_REASON_CD             0x01 /* 0 = data transfer */
#define ATAPI_INT_REASON_IO             0x02 /* 1 = transfer to the host */
#define ATAPI_INT_REASON_REL            0x04
#define ATAPI_INT_REASON_TAG            0xf8

/* same constants as bochs */
277
#define ASC_ILLEGAL_OPCODE                   0x20
B
bellard 已提交
278 279 280 281 282 283 284 285 286 287 288 289 290 291
#define ASC_LOGICAL_BLOCK_OOR                0x21
#define ASC_INV_FIELD_IN_CMD_PACKET          0x24
#define ASC_MEDIUM_NOT_PRESENT               0x3a
#define ASC_SAVING_PARAMETERS_NOT_SUPPORTED  0x39

#define SENSE_NONE            0
#define SENSE_NOT_READY       2
#define SENSE_ILLEGAL_REQUEST 5
#define SENSE_UNIT_ATTENTION  6

struct IDEState;

typedef void EndTransferFunc(struct IDEState *);

292
/* NOTE: IDEState represents in fact one drive */
B
bellard 已提交
293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341
typedef struct IDEState {
    /* ide config */
    int is_cdrom;
    int cylinders, heads, sectors;
    int64_t nb_sectors;
    int mult_sectors;
    int irq;
    /* ide regs */
    uint8_t feature;
    uint8_t error;
    uint16_t nsector; /* 0 is 256 to ease computations */
    uint8_t sector;
    uint8_t lcyl;
    uint8_t hcyl;
    uint8_t select;
    uint8_t status;
    /* 0x3f6 command, only meaningful for drive 0 */
    uint8_t cmd;
    /* depends on bit 4 in select, only meaningful for drive 0 */
    struct IDEState *cur_drive; 
    BlockDriverState *bs;
    /* ATAPI specific */
    uint8_t sense_key;
    uint8_t asc;
    int packet_transfer_size;
    int elementary_transfer_size;
    int io_buffer_index;
    int lba;
    /* transfer handling */
    int req_nb_sectors; /* number of sectors per interrupt */
    EndTransferFunc *end_transfer_func;
    uint8_t *data_ptr;
    uint8_t *data_end;
    uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4];
} IDEState;

static void padstr(char *str, const char *src, int len)
{
    int i, v;
    for(i = 0; i < len; i++) {
        if (*src)
            v = *src++;
        else
            v = ' ';
        *(char *)((long)str ^ 1) = v;
        str++;
    }
}

B
bellard 已提交
342 343 344 345 346 347 348 349 350 351 352
static void padstr8(uint8_t *buf, int buf_size, const char *src)
{
    int i;
    for(i = 0; i < buf_size; i++) {
        if (*src)
            buf[i] = *src++;
        else
            buf[i] = ' ';
    }
}

B
bellard 已提交
353 354
static void put_le16(uint16_t *p, unsigned int v)
{
B
bellard 已提交
355
    *p = cpu_to_le16(v);
B
bellard 已提交
356 357
}

B
bellard 已提交
358 359 360 361 362 363 364
static void ide_identify(IDEState *s)
{
    uint16_t *p;
    unsigned int oldsize;

    memset(s->io_buffer, 0, 512);
    p = (uint16_t *)s->io_buffer;
B
bellard 已提交
365 366 367 368 369 370
    put_le16(p + 0, 0x0040);
    put_le16(p + 1, s->cylinders); 
    put_le16(p + 3, s->heads);
    put_le16(p + 4, 512 * s->sectors); /* XXX: retired, remove ? */
    put_le16(p + 5, 512); /* XXX: retired, remove ? */
    put_le16(p + 6, s->sectors); 
B
bellard 已提交
371
    padstr((uint8_t *)(p + 10), "QM00001", 20); /* serial number */
B
bellard 已提交
372 373 374
    put_le16(p + 20, 3); /* XXX: retired, remove ? */
    put_le16(p + 21, 512); /* cache size in sectors */
    put_le16(p + 22, 4); /* ecc bytes */
B
bellard 已提交
375 376 377
    padstr((uint8_t *)(p + 23), QEMU_VERSION, 8); /* firmware version */
    padstr((uint8_t *)(p + 27), "QEMU HARDDISK", 40); /* model */
#if MAX_MULT_SECTORS > 1    
B
bellard 已提交
378
    put_le16(p + 47, 0x8000 | MAX_MULT_SECTORS);
B
bellard 已提交
379
#endif
B
bellard 已提交
380 381 382 383 384 385 386 387
    put_le16(p + 48, 1); /* dword I/O */
    put_le16(p + 49, 1 << 9); /* LBA supported, no DMA */
    put_le16(p + 51, 0x200); /* PIO transfer cycle */
    put_le16(p + 52, 0x200); /* DMA transfer cycle */
    put_le16(p + 53, 1); /* words 54-58 are valid */
    put_le16(p + 54, s->cylinders);
    put_le16(p + 55, s->heads);
    put_le16(p + 56, s->sectors);
B
bellard 已提交
388
    oldsize = s->cylinders * s->heads * s->sectors;
B
bellard 已提交
389 390
    put_le16(p + 57, oldsize);
    put_le16(p + 58, oldsize >> 16);
B
bellard 已提交
391
    if (s->mult_sectors)
B
bellard 已提交
392 393 394 395 396 397 398 399 400 401
        put_le16(p + 59, 0x100 | s->mult_sectors);
    put_le16(p + 60, s->nb_sectors);
    put_le16(p + 61, s->nb_sectors >> 16);
    put_le16(p + 80, (1 << 1) | (1 << 2));
    put_le16(p + 82, (1 << 14));
    put_le16(p + 83, (1 << 14));
    put_le16(p + 84, (1 << 14));
    put_le16(p + 85, (1 << 14));
    put_le16(p + 86, 0);
    put_le16(p + 87, (1 << 14));
B
bellard 已提交
402 403 404 405 406 407 408 409 410
}

static void ide_atapi_identify(IDEState *s)
{
    uint16_t *p;

    memset(s->io_buffer, 0, 512);
    p = (uint16_t *)s->io_buffer;
    /* Removable CDROM, 50us response, 12 byte packets */
B
bellard 已提交
411 412 413 414 415 416
    put_le16(p + 0, (2 << 14) | (5 << 8) | (1 << 7) | (2 << 5) | (0 << 0));
    put_le16(p + 1, s->cylinders); 
    put_le16(p + 3, s->heads);
    put_le16(p + 4, 512 * s->sectors); /* sectors */
    put_le16(p + 5, 512); /* sector size */
    put_le16(p + 6, s->sectors); 
B
bellard 已提交
417
    padstr((uint8_t *)(p + 10), "QM00001", 20); /* serial number */
B
bellard 已提交
418 419 420
    put_le16(p + 20, 3); /* buffer type */
    put_le16(p + 21, 512); /* cache size in sectors */
    put_le16(p + 22, 4); /* ecc bytes */
B
bellard 已提交
421 422
    padstr((uint8_t *)(p + 23), QEMU_VERSION, 8); /* firmware version */
    padstr((uint8_t *)(p + 27), "QEMU CD-ROM", 40); /* model */
B
bellard 已提交
423 424 425 426 427 428 429 430 431
    put_le16(p + 48, 1); /* dword I/O (XXX: should not be set on CDROM) */
    put_le16(p + 49, 1 << 9); /* LBA supported, no DMA */
    put_le16(p + 53, 3); /* words 64-70, 54-58 valid */
    put_le16(p + 63, 0x103); /* DMA modes XXX: may be incorrect */
    put_le16(p + 64, 1); /* PIO modes */
    put_le16(p + 65, 0xb4); /* minimum DMA multiword tx cycle time */
    put_le16(p + 66, 0xb4); /* recommended DMA multiword tx cycle time */
    put_le16(p + 67, 0x12c); /* minimum PIO cycle time without flow control */
    put_le16(p + 68, 0xb4); /* minimum PIO cycle time with IORDY flow control */
B
bellard 已提交
432
    
B
bellard 已提交
433 434
    put_le16(p + 71, 30); /* in ns */
    put_le16(p + 72, 30); /* in ns */
B
bellard 已提交
435

B
bellard 已提交
436
    put_le16(p + 80, 0x1e); /* support up to ATA/ATAPI-4 */
B
bellard 已提交
437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515
}

static void ide_set_signature(IDEState *s)
{
    s->select &= 0xf0; /* clear head */
    /* put signature */
    s->nsector = 1;
    s->sector = 1;
    if (s->is_cdrom) {
        s->lcyl = 0x14;
        s->hcyl = 0xeb;
    } else if (s->bs) {
        s->lcyl = 0;
        s->hcyl = 0;
    } else {
        s->lcyl = 0xff;
        s->hcyl = 0xff;
    }
}

static inline void ide_abort_command(IDEState *s)
{
    s->status = READY_STAT | ERR_STAT;
    s->error = ABRT_ERR;
}

static inline void ide_set_irq(IDEState *s)
{
    if (!(s->cmd & IDE_CMD_DISABLE_IRQ)) {
        pic_set_irq(s->irq, 1);
    }
}

/* prepare data transfer and tell what to do after */
static void ide_transfer_start(IDEState *s, uint8_t *buf, int size, 
                               EndTransferFunc *end_transfer_func)
{
    s->end_transfer_func = end_transfer_func;
    s->data_ptr = buf;
    s->data_end = buf + size;
    s->status |= DRQ_STAT;
}

static void ide_transfer_stop(IDEState *s)
{
    s->end_transfer_func = ide_transfer_stop;
    s->data_ptr = s->io_buffer;
    s->data_end = s->io_buffer;
    s->status &= ~DRQ_STAT;
}

static int64_t ide_get_sector(IDEState *s)
{
    int64_t sector_num;
    if (s->select & 0x40) {
        /* lba */
        sector_num = ((s->select & 0x0f) << 24) | (s->hcyl << 16) | 
            (s->lcyl << 8) | s->sector;
    } else {
        sector_num = ((s->hcyl << 8) | s->lcyl) * s->heads * s->sectors +
            (s->select & 0x0f) * s->sectors + 
            (s->sector - 1);
    }
    return sector_num;
}

static void ide_set_sector(IDEState *s, int64_t sector_num)
{
    unsigned int cyl, r;
    if (s->select & 0x40) {
        s->select = (s->select & 0xf0) | (sector_num >> 24);
        s->hcyl = (sector_num >> 16);
        s->lcyl = (sector_num >> 8);
        s->sector = (sector_num);
    } else {
        cyl = sector_num / (s->heads * s->sectors);
        r = sector_num % (s->heads * s->sectors);
        s->hcyl = cyl >> 8;
        s->lcyl = cyl;
516
        s->select = (s->select & 0xf0) | ((r / s->sectors) & 0x0f);
B
bellard 已提交
517 518 519 520 521 522 523 524 525 526
        s->sector = (r % s->sectors) + 1;
    }
}

static void ide_sector_read(IDEState *s)
{
    int64_t sector_num;
    int ret, n;

    s->status = READY_STAT | SEEK_STAT;
527
    s->error = 0; /* not needed by IDE spec, but needed by Windows */
B
bellard 已提交
528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672
    sector_num = ide_get_sector(s);
    n = s->nsector;
    if (n == 0) {
        /* no more sector to read from disk */
        ide_transfer_stop(s);
    } else {
#if defined(DEBUG_IDE)
        printf("read sector=%Ld\n", sector_num);
#endif
        if (n > s->req_nb_sectors)
            n = s->req_nb_sectors;
        ret = bdrv_read(s->bs, sector_num, s->io_buffer, n);
        ide_transfer_start(s, s->io_buffer, 512 * n, ide_sector_read);
        ide_set_irq(s);
        ide_set_sector(s, sector_num + n);
        s->nsector -= n;
    }
}

static void ide_sector_write(IDEState *s)
{
    int64_t sector_num;
    int ret, n, n1;

    s->status = READY_STAT | SEEK_STAT;
    sector_num = ide_get_sector(s);
#if defined(DEBUG_IDE)
    printf("write sector=%Ld\n", sector_num);
#endif
    n = s->nsector;
    if (n > s->req_nb_sectors)
        n = s->req_nb_sectors;
    ret = bdrv_write(s->bs, sector_num, s->io_buffer, n);
    s->nsector -= n;
    if (s->nsector == 0) {
        /* no more sector to write */
        ide_transfer_stop(s);
    } else {
        n1 = s->nsector;
        if (n1 > s->req_nb_sectors)
            n1 = s->req_nb_sectors;
        ide_transfer_start(s, s->io_buffer, 512 * n1, ide_sector_write);
    }
    ide_set_sector(s, sector_num + n);
    ide_set_irq(s);
}

static void ide_atapi_cmd_ok(IDEState *s)
{
    s->error = 0;
    s->status = READY_STAT;
    s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
    ide_set_irq(s);
}

static void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc)
{
#ifdef DEBUG_IDE_ATAPI
    printf("atapi_cmd_error: sense=0x%x asc=0x%x\n", sense_key, asc);
#endif
    s->error = sense_key << 4;
    s->status = READY_STAT | ERR_STAT;
    s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
    s->sense_key = sense_key;
    s->asc = asc;
    ide_set_irq(s);
}

static inline void cpu_to_ube16(uint8_t *buf, int val)
{
    buf[0] = val >> 8;
    buf[1] = val;
}

static inline void cpu_to_ube32(uint8_t *buf, unsigned int val)
{
    buf[0] = val >> 24;
    buf[1] = val >> 16;
    buf[2] = val >> 8;
    buf[3] = val;
}

static inline int ube16_to_cpu(const uint8_t *buf)
{
    return (buf[0] << 8) | buf[1];
}

static inline int ube32_to_cpu(const uint8_t *buf)
{
    return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
}

/* The whole ATAPI transfer logic is handled in this function */
static void ide_atapi_cmd_reply_end(IDEState *s)
{
    int byte_count_limit, size;
#ifdef DEBUG_IDE_ATAPI
    printf("reply: tx_size=%d elem_tx_size=%d index=%d\n", 
           s->packet_transfer_size,
           s->elementary_transfer_size,
           s->io_buffer_index);
#endif
    if (s->packet_transfer_size <= 0) {
        /* end of transfer */
        ide_transfer_stop(s);
        s->status = READY_STAT;
        s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
        ide_set_irq(s);
#ifdef DEBUG_IDE_ATAPI
        printf("status=0x%x\n", s->status);
#endif
    } else {
        /* see if a new sector must be read */
        if (s->lba != -1 && s->io_buffer_index >= 2048) {
            bdrv_read(s->bs, (int64_t)s->lba << 2, s->io_buffer, 4);
            s->lba++;
            s->io_buffer_index = 0;
        }
        if (s->elementary_transfer_size > 0) {
            /* there are some data left to transmit in this elementary
               transfer */
            size = 2048 - s->io_buffer_index;
            if (size > s->elementary_transfer_size)
                size = s->elementary_transfer_size;
            ide_transfer_start(s, s->io_buffer + s->io_buffer_index, 
                               size, ide_atapi_cmd_reply_end);
            s->packet_transfer_size -= size;
            s->elementary_transfer_size -= size;
            s->io_buffer_index += size;
        } else {
            /* a new transfer is needed */
            s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO;
            byte_count_limit = s->lcyl | (s->hcyl << 8);
#ifdef DEBUG_IDE_ATAPI
            printf("byte_count_limit=%d\n", byte_count_limit);
#endif
            if (byte_count_limit == 0xffff)
                byte_count_limit--;
            size = s->packet_transfer_size;
            if (size > byte_count_limit) {
                /* byte count limit must be even if this case */
                if (byte_count_limit & 1)
                    byte_count_limit--;
                size = byte_count_limit;
            }
673 674
            s->lcyl = size;
            s->hcyl = size >> 8;
B
bellard 已提交
675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789
            s->elementary_transfer_size = size;
            /* we cannot transmit more than one sector at a time */
            if (s->lba != -1) {
                if (size > (2048 - s->io_buffer_index))
                    size = (2048 - s->io_buffer_index);
            }
            ide_transfer_start(s, s->io_buffer + s->io_buffer_index, 
                               size, ide_atapi_cmd_reply_end);
            s->packet_transfer_size -= size;
            s->elementary_transfer_size -= size;
            s->io_buffer_index += size;
            ide_set_irq(s);
#ifdef DEBUG_IDE_ATAPI
            printf("status=0x%x\n", s->status);
#endif
        }
    }
}

/* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */
static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size)
{
    if (size > max_size)
        size = max_size;
    s->lba = -1; /* no sector read */
    s->packet_transfer_size = size;
    s->elementary_transfer_size = 0;
    s->io_buffer_index = 0;

    s->status = READY_STAT;
    ide_atapi_cmd_reply_end(s);
}

/* start a CD-CDROM read command */
static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors)
{
#ifdef DEBUG_IDE_ATAPI
    printf("read: LBA=%d nb_sectors=%d\n", lba, nb_sectors);
#endif
    s->lba = lba;
    s->packet_transfer_size = nb_sectors * 2048;
    s->elementary_transfer_size = 0;
    s->io_buffer_index = 2048;

    s->status = READY_STAT;
    ide_atapi_cmd_reply_end(s);
}

/* same toc as bochs. Return -1 if error or the toc length */
static int cdrom_read_toc(IDEState *s, uint8_t *buf, int msf, int start_track)
{
    uint8_t *q;
    int nb_sectors, len;
    
    if (start_track > 1 && start_track != 0xaa)
        return -1;
    q = buf + 2;
    *q++ = 1;
    *q++ = 1;
    if (start_track <= 1) {
        *q++ = 0; /* reserved */
        *q++ = 0x14; /* ADR, control */
        *q++ = 1;    /* track number */
        *q++ = 0; /* reserved */
        if (msf) {
            *q++ = 0; /* reserved */
            *q++ = 0; /* minute */
            *q++ = 2; /* second */
            *q++ = 0; /* frame */
        } else {
            /* sector 0 */
            cpu_to_ube32(q, 0);
            q += 4;
        }
    }
    /* lead out track */
    *q++ = 0; /* reserved */
    *q++ = 0x16; /* ADR, control */
    *q++ = 0xaa; /* track number */
    *q++ = 0; /* reserved */
    nb_sectors = s->nb_sectors >> 2;
    if (msf) {
        *q++ = 0; /* reserved */
        *q++ = ((nb_sectors + 150) / 75) / 60;
        *q++ = ((nb_sectors + 150) / 75) % 60;
        *q++ = (nb_sectors + 150) % 75;
    } else {
        cpu_to_ube32(q, nb_sectors);
        q += 4;
    }
    len = q - buf;
    cpu_to_ube16(buf, len - 2);
    return len;
}

static void ide_atapi_cmd(IDEState *s)
{
    const uint8_t *packet;
    uint8_t *buf;
    int max_len;

    packet = s->io_buffer;
    buf = s->io_buffer;
#ifdef DEBUG_IDE_ATAPI
    {
        int i;
        printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8));
        for(i = 0; i < ATAPI_PACKET_SIZE; i++) {
            printf(" %02x", packet[i]);
        }
        printf("\n");
    }
#endif
    switch(s->io_buffer[0]) {
    case GPCMD_TEST_UNIT_READY:
790
        if (bdrv_is_inserted(s->bs)) {
B
bellard 已提交
791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
            ide_atapi_cmd_ok(s);
        } else {
            ide_atapi_cmd_error(s, SENSE_NOT_READY, 
                                ASC_MEDIUM_NOT_PRESENT);
        }
        break;
    case GPCMD_MODE_SENSE_10:
        {
            int action, code;
            max_len = ube16_to_cpu(packet + 7);
            action = packet[2] >> 6;
            code = packet[2] & 0x3f;
            switch(action) {
            case 0: /* current values */
                switch(code) {
                case 0x01: /* error recovery */
                    cpu_to_ube16(&buf[0], 16 + 6);
                    buf[2] = 0x70;
                    buf[3] = 0;
                    buf[4] = 0;
                    buf[5] = 0;
                    buf[6] = 0;
                    buf[7] = 0;

                    buf[8] = 0x01;
                    buf[9] = 0x06;
                    buf[10] = 0x00;
                    buf[11] = 0x05;
                    buf[12] = 0x00;
                    buf[13] = 0x00;
                    buf[14] = 0x00;
                    buf[15] = 0x00;
                    ide_atapi_cmd_reply(s, 16, max_len);
                    break;
                case 0x2a:
                    cpu_to_ube16(&buf[0], 28 + 6);
                    buf[2] = 0x70;
                    buf[3] = 0;
                    buf[4] = 0;
                    buf[5] = 0;
                    buf[6] = 0;
                    buf[7] = 0;

                    buf[8] = 0x2a;
                    buf[9] = 0x12;
                    buf[10] = 0x00;
                    buf[11] = 0x00;
                    
                    buf[12] = 0x70;
                    buf[13] = 3 << 5;
                    buf[14] = (1 << 0) | (1 << 3) | (1 << 5);
842
                    if (bdrv_is_locked(s->bs))
B
bellard 已提交
843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881
                        buf[6] |= 1 << 1;
                    buf[15] = 0x00;
                    cpu_to_ube16(&buf[16], 706);
                    buf[18] = 0;
                    buf[19] = 2;
                    cpu_to_ube16(&buf[20], 512);
                    cpu_to_ube16(&buf[22], 706);
                    buf[24] = 0;
                    buf[25] = 0;
                    buf[26] = 0;
                    buf[27] = 0;
                    ide_atapi_cmd_reply(s, 28, max_len);
                    break;
                default:
                    goto error_cmd;
                }
                break;
            case 1: /* changeable values */
                goto error_cmd;
            case 2: /* default values */
                goto error_cmd;
            default:
            case 3: /* saved values */
                ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST, 
                                    ASC_SAVING_PARAMETERS_NOT_SUPPORTED);
                break;
            }
        }
        break;
    case GPCMD_REQUEST_SENSE:
        max_len = packet[4];
        memset(buf, 0, 18);
        buf[0] = 0x70 | (1 << 7);
        buf[2] = s->sense_key;
        buf[7] = 10;
        buf[12] = s->asc;
        ide_atapi_cmd_reply(s, 18, max_len);
        break;
    case GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
882 883
        if (bdrv_is_inserted(s->bs)) {
            bdrv_set_locked(s->bs, packet[4] & 1);
B
bellard 已提交
884 885 886 887 888 889 890 891 892 893 894
            ide_atapi_cmd_ok(s);
        } else {
            ide_atapi_cmd_error(s, SENSE_NOT_READY, 
                                ASC_MEDIUM_NOT_PRESENT);
        }
        break;
    case GPCMD_READ_10:
    case GPCMD_READ_12:
        {
            int nb_sectors, lba;

895
            if (!bdrv_is_inserted(s->bs)) {
B
bellard 已提交
896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919
                ide_atapi_cmd_error(s, SENSE_NOT_READY, 
                                    ASC_MEDIUM_NOT_PRESENT);
                break;
            }
            if (packet[0] == GPCMD_READ_10)
                nb_sectors = ube16_to_cpu(packet + 7);
            else
                nb_sectors = ube32_to_cpu(packet + 6);
            lba = ube32_to_cpu(packet + 2);
            if (nb_sectors == 0) {
                ide_atapi_cmd_ok(s);
                break;
            }
            if (((int64_t)(lba + nb_sectors) << 2) > s->nb_sectors) {
                ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST, 
                                    ASC_LOGICAL_BLOCK_OOR);
                break;
            }
            ide_atapi_cmd_read(s, lba, nb_sectors);
        }
        break;
    case GPCMD_SEEK:
        {
            int lba;
920
            if (!bdrv_is_inserted(s->bs)) {
B
bellard 已提交
921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939
                ide_atapi_cmd_error(s, SENSE_NOT_READY, 
                                    ASC_MEDIUM_NOT_PRESENT);
                break;
            }
            lba = ube32_to_cpu(packet + 2);
            if (((int64_t)lba << 2) > s->nb_sectors) {
                ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST, 
                                    ASC_LOGICAL_BLOCK_OOR);
                break;
            }
            ide_atapi_cmd_ok(s);
        }
        break;
    case GPCMD_START_STOP_UNIT:
        {
            int start, eject;
            start = packet[4] & 1;
            eject = (packet[4] >> 1) & 1;
            
940 941 942 943
            if (eject && !start) {
                /* eject the disk */
                bdrv_close(s->bs);
            }
B
bellard 已提交
944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
            ide_atapi_cmd_ok(s);
        }
        break;
    case GPCMD_MECHANISM_STATUS:
        {
            max_len = ube16_to_cpu(packet + 8);
            cpu_to_ube16(buf, 0);
            /* no current LBA */
            buf[2] = 0;
            buf[3] = 0;
            buf[4] = 0;
            buf[5] = 1;
            cpu_to_ube16(buf + 6, 0);
            ide_atapi_cmd_reply(s, 8, max_len);
        }
        break;
    case GPCMD_READ_TOC_PMA_ATIP:
        {
            int format, msf, start_track, len;

964
            if (!bdrv_is_inserted(s->bs)) {
B
bellard 已提交
965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988
                ide_atapi_cmd_error(s, SENSE_NOT_READY, 
                                    ASC_MEDIUM_NOT_PRESENT);
                break;
            }
            max_len = ube16_to_cpu(packet + 7);
            format = packet[9] >> 6;
            msf = (packet[1] >> 1) & 1;
            start_track = packet[6];
            switch(format) {
            case 0:
                len = cdrom_read_toc(s, buf, msf, start_track);
                if (len < 0)
                    goto error_cmd;
                ide_atapi_cmd_reply(s, len, max_len);
                break;
            case 1:
                /* multi session : only a single session defined */
                memset(buf, 0, 12);
                buf[1] = 0x0a;
                buf[2] = 0x01;
                buf[3] = 0x01;
                ide_atapi_cmd_reply(s, 12, max_len);
                break;
            default:
989 990 991 992
            error_cmd:
                ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST, 
                                    ASC_INV_FIELD_IN_CMD_PACKET);
                break;
B
bellard 已提交
993 994 995 996
            }
        }
        break;
    case GPCMD_READ_CDVD_CAPACITY:
997
        if (!bdrv_is_inserted(s->bs)) {
B
bellard 已提交
998 999 1000 1001 1002 1003 1004 1005 1006
            ide_atapi_cmd_error(s, SENSE_NOT_READY, 
                                ASC_MEDIUM_NOT_PRESENT);
            break;
        }
        /* NOTE: it is really the number of sectors minus 1 */
        cpu_to_ube32(buf, (s->nb_sectors >> 2) - 1);
        cpu_to_ube32(buf + 4, 2048);
        ide_atapi_cmd_reply(s, 8, 8);
        break;
B
bellard 已提交
1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
    case GPCMD_INQUIRY:
        max_len = packet[4];
        buf[0] = 0x05; /* CD-ROM */
        buf[1] = 0x80; /* removable */
        buf[2] = 0x00; /* ISO */
        buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */
        buf[4] = 31; /* additionnal length */
        buf[5] = 0; /* reserved */
        buf[6] = 0; /* reserved */
        buf[7] = 0; /* reserved */
        padstr8(buf + 8, 8, "QEMU");
        padstr8(buf + 16, 16, "QEMU CD-ROM");
        padstr8(buf + 32, 4, QEMU_VERSION);
        ide_atapi_cmd_reply(s, 36, max_len);
        break;
B
bellard 已提交
1022 1023
    default:
        ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST, 
1024
                            ASC_ILLEGAL_OPCODE);
B
bellard 已提交
1025 1026 1027 1028
        break;
    }
}

1029 1030
/* called when the inserted state of the media has changed */
static void cdrom_change_cb(void *opaque)
B
bellard 已提交
1031
{
1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
    IDEState *s = opaque;
    int64_t nb_sectors;

    /* XXX: send interrupt too */
    bdrv_get_geometry(s->bs, &nb_sectors);
    s->nb_sectors = nb_sectors;
}

static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
    IDEState *ide_if = opaque;
1043
    IDEState *s;
B
bellard 已提交
1044 1045 1046 1047 1048 1049 1050 1051 1052 1053
    int unit, n;

#ifdef DEBUG_IDE
    printf("IDE: write addr=0x%x val=0x%02x\n", addr, val);
#endif
    addr &= 7;
    switch(addr) {
    case 0:
        break;
    case 1:
1054 1055 1056
        /* NOTE: data is written to the two drives */
        ide_if[0].feature = val;
        ide_if[1].feature = val;
B
bellard 已提交
1057 1058 1059 1060
        break;
    case 2:
        if (val == 0)
            val = 256;
1061 1062
        ide_if[0].nsector = val;
        ide_if[1].nsector = val;
B
bellard 已提交
1063 1064
        break;
    case 3:
1065 1066
        ide_if[0].sector = val;
        ide_if[1].sector = val;
B
bellard 已提交
1067 1068
        break;
    case 4:
1069 1070
        ide_if[0].lcyl = val;
        ide_if[1].lcyl = val;
B
bellard 已提交
1071 1072
        break;
    case 5:
1073 1074
        ide_if[0].hcyl = val;
        ide_if[1].hcyl = val;
B
bellard 已提交
1075 1076
        break;
    case 6:
B
bellard 已提交
1077 1078
        ide_if[0].select = (val & ~0x10) | 0xa0;
        ide_if[1].select = (val | 0x10) | 0xa0;
B
bellard 已提交
1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
        /* select drive */
        unit = (val >> 4) & 1;
        s = ide_if + unit;
        ide_if->cur_drive = s;
        break;
    default:
    case 7:
        /* command */
#if defined(DEBUG_IDE)
        printf("ide: CMD=%02x\n", val);
#endif
1090
        s = ide_if->cur_drive;
B
bellard 已提交
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
        switch(val) {
        case WIN_IDENTIFY:
            if (s->bs && !s->is_cdrom) {
                ide_identify(s);
                s->status = READY_STAT;
                ide_transfer_start(s, s->io_buffer, 512, ide_transfer_stop);
            } else {
                if (s->is_cdrom) {
                    ide_set_signature(s);
                }
                ide_abort_command(s);
            }
            ide_set_irq(s);
            break;
        case WIN_SPECIFY:
        case WIN_RECAL:
1107
            s->error = 0;
B
bellard 已提交
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121
            s->status = READY_STAT;
            ide_set_irq(s);
            break;
        case WIN_SETMULT:
            if (s->nsector > MAX_MULT_SECTORS || 
                s->nsector == 0 ||
                (s->nsector & (s->nsector - 1)) != 0) {
                ide_abort_command(s);
            } else {
                s->mult_sectors = s->nsector;
                s->status = READY_STAT;
            }
            ide_set_irq(s);
            break;
B
bellard 已提交
1122 1123 1124 1125 1126 1127
        case WIN_VERIFY:
        case WIN_VERIFY_ONCE:
            /* do sector number check ? */
            s->status = READY_STAT;
            ide_set_irq(s);
            break;
B
bellard 已提交
1128 1129
        case WIN_READ:
        case WIN_READ_ONCE:
B
bellard 已提交
1130 1131
            if (!s->bs) 
                goto abort_cmd;
B
bellard 已提交
1132 1133 1134 1135 1136
            s->req_nb_sectors = 1;
            ide_sector_read(s);
            break;
        case WIN_WRITE:
        case WIN_WRITE_ONCE:
1137
            s->error = 0;
B
bellard 已提交
1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150
            s->status = SEEK_STAT;
            s->req_nb_sectors = 1;
            ide_transfer_start(s, s->io_buffer, 512, ide_sector_write);
            break;
        case WIN_MULTREAD:
            if (!s->mult_sectors)
                goto abort_cmd;
            s->req_nb_sectors = s->mult_sectors;
            ide_sector_read(s);
            break;
        case WIN_MULTWRITE:
            if (!s->mult_sectors)
                goto abort_cmd;
1151
            s->error = 0;
B
bellard 已提交
1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163
            s->status = SEEK_STAT;
            s->req_nb_sectors = s->mult_sectors;
            n = s->nsector;
            if (n > s->req_nb_sectors)
                n = s->req_nb_sectors;
            ide_transfer_start(s, s->io_buffer, 512 * n, ide_sector_write);
            break;
        case WIN_READ_NATIVE_MAX:
            ide_set_sector(s, s->nb_sectors - 1);
            s->status = READY_STAT;
            ide_set_irq(s);
            break;
1164 1165 1166 1167 1168
        case WIN_CHECKPOWERMODE1:
            s->nsector = 0xff; /* device active or idle */
            s->status = READY_STAT;
            ide_set_irq(s);
            break;
B
bellard 已提交
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184

            /* ATAPI commands */
        case WIN_PIDENTIFY:
            if (s->is_cdrom) {
                ide_atapi_identify(s);
                s->status = READY_STAT;
                ide_transfer_start(s, s->io_buffer, 512, ide_transfer_stop);
            } else {
                ide_abort_command(s);
            }
            ide_set_irq(s);
            break;
        case WIN_SRST:
            if (!s->is_cdrom)
                goto abort_cmd;
            ide_set_signature(s);
B
bellard 已提交
1185
            s->status = 0x00; /* NOTE: READY is _not_ set */
B
bellard 已提交
1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
            s->error = 0x01;
            break;
        case WIN_PACKETCMD:
            if (!s->is_cdrom)
                goto abort_cmd;
            /* DMA or overlapping commands not supported */
            if ((s->feature & 0x03) != 0)
                goto abort_cmd;
            s->nsector = 1;
            ide_transfer_start(s, s->io_buffer, ATAPI_PACKET_SIZE, 
                               ide_atapi_cmd);
            break;
        default:
        abort_cmd:
            ide_abort_command(s);
            ide_set_irq(s);
            break;
        }
    }
}

1207
static uint32_t ide_ioport_read(void *opaque, uint32_t addr1)
B
bellard 已提交
1208
{
B
bellard 已提交
1209 1210
    IDEState *ide_if = opaque;
    IDEState *s = ide_if->cur_drive;
B
bellard 已提交
1211 1212 1213 1214 1215 1216 1217 1218 1219
    uint32_t addr;
    int ret;

    addr = addr1 & 7;
    switch(addr) {
    case 0:
        ret = 0xff;
        break;
    case 1:
B
bellard 已提交
1220
        if (!ide_if[0].bs && !ide_if[1].bs)
1221 1222 1223
            ret = 0;
        else
            ret = s->error;
B
bellard 已提交
1224 1225
        break;
    case 2:
B
bellard 已提交
1226
        if (!ide_if[0].bs && !ide_if[1].bs)
1227 1228 1229
            ret = 0;
        else
            ret = s->nsector & 0xff;
B
bellard 已提交
1230 1231
        break;
    case 3:
B
bellard 已提交
1232
        if (!ide_if[0].bs && !ide_if[1].bs)
1233 1234 1235
            ret = 0;
        else
            ret = s->sector;
B
bellard 已提交
1236 1237
        break;
    case 4:
B
bellard 已提交
1238
        if (!ide_if[0].bs && !ide_if[1].bs)
1239 1240 1241
            ret = 0;
        else
            ret = s->lcyl;
B
bellard 已提交
1242 1243
        break;
    case 5:
B
bellard 已提交
1244
        if (!ide_if[0].bs && !ide_if[1].bs)
1245 1246 1247
            ret = 0;
        else
            ret = s->hcyl;
B
bellard 已提交
1248 1249
        break;
    case 6:
B
bellard 已提交
1250
        if (!ide_if[0].bs && !ide_if[1].bs)
1251 1252
            ret = 0;
        else
B
bellard 已提交
1253
            ret = s->select;
B
bellard 已提交
1254 1255 1256
        break;
    default:
    case 7:
B
bellard 已提交
1257
        if (!ide_if[0].bs && !ide_if[1].bs)
1258 1259 1260
            ret = 0;
        else
            ret = s->status;
B
bellard 已提交
1261 1262 1263 1264 1265 1266 1267 1268 1269
        pic_set_irq(s->irq, 0);
        break;
    }
#ifdef DEBUG_IDE
    printf("ide: read addr=0x%x val=%02x\n", addr1, ret);
#endif
    return ret;
}

1270
static uint32_t ide_status_read(void *opaque, uint32_t addr)
B
bellard 已提交
1271
{
B
bellard 已提交
1272 1273
    IDEState *ide_if = opaque;
    IDEState *s = ide_if->cur_drive;
B
bellard 已提交
1274
    int ret;
B
bellard 已提交
1275 1276 1277 1278 1279

    if (!ide_if[0].bs && !ide_if[1].bs)
        ret = 0;
    else
        ret = s->status;
B
bellard 已提交
1280 1281 1282 1283 1284 1285
#ifdef DEBUG_IDE
    printf("ide: read status addr=0x%x val=%02x\n", addr, ret);
#endif
    return ret;
}

1286
static void ide_cmd_write(void *opaque, uint32_t addr, uint32_t val)
B
bellard 已提交
1287
{
1288
    IDEState *ide_if = opaque;
B
bellard 已提交
1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308
    IDEState *s;
    int i;

#ifdef DEBUG_IDE
    printf("ide: write control addr=0x%x val=%02x\n", addr, val);
#endif
    /* common for both drives */
    if (!(ide_if[0].cmd & IDE_CMD_RESET) &&
        (val & IDE_CMD_RESET)) {
        /* reset low to high */
        for(i = 0;i < 2; i++) {
            s = &ide_if[i];
            s->status = BUSY_STAT | SEEK_STAT;
            s->error = 0x01;
        }
    } else if ((ide_if[0].cmd & IDE_CMD_RESET) &&
               !(val & IDE_CMD_RESET)) {
        /* high to low */
        for(i = 0;i < 2; i++) {
            s = &ide_if[i];
B
bellard 已提交
1309 1310 1311
            if (s->is_cdrom)
                s->status = 0x00; /* NOTE: READY is _not_ set */
            else
1312
                s->status = READY_STAT | SEEK_STAT;
B
bellard 已提交
1313 1314 1315 1316 1317 1318 1319 1320
            ide_set_signature(s);
        }
    }

    ide_if[0].cmd = val;
    ide_if[1].cmd = val;
}

1321
static void ide_data_writew(void *opaque, uint32_t addr, uint32_t val)
B
bellard 已提交
1322
{
1323
    IDEState *s = ((IDEState *)opaque)->cur_drive;
B
bellard 已提交
1324 1325 1326
    uint8_t *p;

    p = s->data_ptr;
B
bellard 已提交
1327
    *(uint16_t *)p = le16_to_cpu(val);
B
bellard 已提交
1328 1329 1330 1331 1332 1333
    p += 2;
    s->data_ptr = p;
    if (p >= s->data_end)
        s->end_transfer_func(s);
}

1334
static uint32_t ide_data_readw(void *opaque, uint32_t addr)
B
bellard 已提交
1335
{
1336
    IDEState *s = ((IDEState *)opaque)->cur_drive;
B
bellard 已提交
1337 1338 1339
    uint8_t *p;
    int ret;
    p = s->data_ptr;
B
bellard 已提交
1340
    ret = cpu_to_le16(*(uint16_t *)p);
B
bellard 已提交
1341 1342 1343 1344 1345 1346 1347
    p += 2;
    s->data_ptr = p;
    if (p >= s->data_end)
        s->end_transfer_func(s);
    return ret;
}

1348
static void ide_data_writel(void *opaque, uint32_t addr, uint32_t val)
B
bellard 已提交
1349
{
1350
    IDEState *s = ((IDEState *)opaque)->cur_drive;
B
bellard 已提交
1351 1352 1353
    uint8_t *p;

    p = s->data_ptr;
B
bellard 已提交
1354
    *(uint32_t *)p = le32_to_cpu(val);
B
bellard 已提交
1355 1356 1357 1358 1359 1360
    p += 4;
    s->data_ptr = p;
    if (p >= s->data_end)
        s->end_transfer_func(s);
}

1361
static uint32_t ide_data_readl(void *opaque, uint32_t addr)
B
bellard 已提交
1362
{
1363
    IDEState *s = ((IDEState *)opaque)->cur_drive;
B
bellard 已提交
1364 1365 1366 1367
    uint8_t *p;
    int ret;
    
    p = s->data_ptr;
B
bellard 已提交
1368
    ret = cpu_to_le32(*(uint32_t *)p);
B
bellard 已提交
1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415
    p += 4;
    s->data_ptr = p;
    if (p >= s->data_end)
        s->end_transfer_func(s);
    return ret;
}

static void ide_reset(IDEState *s)
{
    s->mult_sectors = MAX_MULT_SECTORS;
    s->cur_drive = s;
    s->select = 0xa0;
    s->status = READY_STAT;
    ide_set_signature(s);
}

struct partition {
	uint8_t boot_ind;		/* 0x80 - active */
	uint8_t head;		/* starting head */
	uint8_t sector;		/* starting sector */
	uint8_t cyl;		/* starting cylinder */
	uint8_t sys_ind;		/* What partition type */
	uint8_t end_head;		/* end head */
	uint8_t end_sector;	/* end sector */
	uint8_t end_cyl;		/* end cylinder */
	uint32_t start_sect;	/* starting sector counting from 0 */
	uint32_t nr_sects;		/* nr of sectors in partition */
} __attribute__((packed));

/* try to guess the IDE geometry from the MSDOS partition table */
static void ide_guess_geometry(IDEState *s)
{
    uint8_t buf[512];
    int ret, i;
    struct partition *p;
    uint32_t nr_sects;

    if (s->cylinders != 0)
        return;
    ret = bdrv_read(s->bs, 0, buf, 1);
    if (ret < 0)
        return;
    /* test msdos magic */
    if (buf[510] != 0x55 || buf[511] != 0xaa)
        return;
    for(i = 0; i < 4; i++) {
        p = ((struct partition *)(buf + 0x1be)) + i;
B
bellard 已提交
1416
        nr_sects = le32_to_cpu(p->nr_sects);
B
bellard 已提交
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
        if (nr_sects && p->end_head) {
            /* We make the assumption that the partition terminates on
               a cylinder boundary */
            s->heads = p->end_head + 1;
            s->sectors = p->end_sector & 63;
            s->cylinders = s->nb_sectors / (s->heads * s->sectors);
#if 0
            printf("guessed partition: CHS=%d %d %d\n", 
                   s->cylinders, s->heads, s->sectors);
#endif
        }
    }
}

1431 1432
void ide_init(int iobase, int iobase2, int irq,
              BlockDriverState *hd0, BlockDriverState *hd1)
B
bellard 已提交
1433
{
1434 1435
    IDEState *s, *ide_state;
    int i, cylinders, heads, secs;
B
bellard 已提交
1436 1437
    int64_t nb_sectors;

1438 1439 1440 1441 1442 1443 1444 1445 1446 1447
    ide_state = qemu_mallocz(sizeof(IDEState) * 2);
    if (!ide_state)
        return;

    for(i = 0; i < 2; i++) {
        s = ide_state + i;
        if (i == 0)
            s->bs = hd0;
        else
            s->bs = hd1;
B
bellard 已提交
1448 1449 1450
        if (s->bs) {
            bdrv_get_geometry(s->bs, &nb_sectors);
            s->nb_sectors = nb_sectors;
1451 1452 1453
            /* if a geometry hint is available, use it */
            bdrv_get_geometry_hint(s->bs, &cylinders, &heads, &secs);
            if (cylinders != 0) {
B
bellard 已提交
1454
                s->cylinders = cylinders;
1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473
                s->heads = heads;
                s->sectors = secs;
            } else {
                ide_guess_geometry(s);
                if (s->cylinders == 0) {
                    /* if no geometry, use a LBA compatible one */
                    cylinders = nb_sectors / (16 * 63);
                    if (cylinders > 16383)
                        cylinders = 16383;
                    else if (cylinders < 2)
                        cylinders = 2;
                    s->cylinders = cylinders;
                    s->heads = 16;
                    s->sectors = 63;
                }
            }
            if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
                s->is_cdrom = 1;
                bdrv_set_change_cb(s->bs, cdrom_change_cb, s);
B
bellard 已提交
1474 1475
            }
        }
1476
        s->irq = irq;
B
bellard 已提交
1477 1478
        ide_reset(s);
    }
1479 1480 1481 1482 1483
    register_ioport_write(iobase, 8, 1, ide_ioport_write, ide_state);
    register_ioport_read(iobase, 8, 1, ide_ioport_read, ide_state);
    if (iobase2) {
        register_ioport_read(iobase2, 1, 1, ide_status_read, ide_state);
        register_ioport_write(iobase2, 1, 1, ide_cmd_write, ide_state);
B
bellard 已提交
1484
    }
1485 1486 1487 1488 1489 1490
    
    /* data ports */
    register_ioport_write(iobase, 2, 2, ide_data_writew, ide_state);
    register_ioport_read(iobase, 2, 2, ide_data_readw, ide_state);
    register_ioport_write(iobase, 4, 4, ide_data_writel, ide_state);
    register_ioport_read(iobase, 4, 4, ide_data_readl, ide_state);
B
bellard 已提交
1491
}