hw/lsi53c895a.c

   1 /*
   2  * QEMU LSI53C895A SCSI Host Bus Adapter emulation
   3  *
   4  * Copyright (c) 2006 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licenced under the LGPL.
   8  */
   9
  10 /* ??? Need to check if the {read,write}[wl] routines work properly on
  11    big-endian targets.  */
  12
  13 #include "hw.h"
  14 #include "pci.h"
  15 #include "scsi-disk.h"
  16 #include "block_int.h"
  17
  18 //#define DEBUG_LSI
  19 //#define DEBUG_LSI_REG
  20
  21 #ifdef DEBUG_LSI
  22 #define DPRINTF(fmt, args...) \
  23 do { printf("lsi_scsi: " fmt , ##args); } while (0)
  24 #define BADF(fmt, args...) \
  25 do { fprintf(stderr, "lsi_scsi: error: " fmt , ##args); exit(1);} while (0)
  26 #else
  27 #define DPRINTF(fmt, args...) do {} while(0)
  28 #define BADF(fmt, args...) \
  29 do { fprintf(stderr, "lsi_scsi: error: " fmt , ##args);} while (0)
  30 #endif
  31
  32 #define LSI_SCNTL0_TRG    0x01
  33 #define LSI_SCNTL0_AAP    0x02
  34 #define LSI_SCNTL0_EPC    0x08
  35 #define LSI_SCNTL0_WATN   0x10
  36 #define LSI_SCNTL0_START  0x20
  37
  38 #define LSI_SCNTL1_SST    0x01
  39 #define LSI_SCNTL1_IARB   0x02
  40 #define LSI_SCNTL1_AESP   0x04
  41 #define LSI_SCNTL1_RST    0x08
  42 #define LSI_SCNTL1_CON    0x10
  43 #define LSI_SCNTL1_DHP    0x20
  44 #define LSI_SCNTL1_ADB    0x40
  45 #define LSI_SCNTL1_EXC    0x80
  46
  47 #define LSI_SCNTL2_WSR    0x01
  48 #define LSI_SCNTL2_VUE0   0x02
  49 #define LSI_SCNTL2_VUE1   0x04
  50 #define LSI_SCNTL2_WSS    0x08
  51 #define LSI_SCNTL2_SLPHBEN 0x10
  52 #define LSI_SCNTL2_SLPMD  0x20
  53 #define LSI_SCNTL2_CHM    0x40
  54 #define LSI_SCNTL2_SDU    0x80
  55
  56 #define LSI_ISTAT0_DIP    0x01
  57 #define LSI_ISTAT0_SIP    0x02
  58 #define LSI_ISTAT0_INTF   0x04
  59 #define LSI_ISTAT0_CON    0x08
  60 #define LSI_ISTAT0_SEM    0x10
  61 #define LSI_ISTAT0_SIGP   0x20
  62 #define LSI_ISTAT0_SRST   0x40
  63 #define LSI_ISTAT0_ABRT   0x80
  64
  65 #define LSI_ISTAT1_SI     0x01
  66 #define LSI_ISTAT1_SRUN   0x02
  67 #define LSI_ISTAT1_FLSH   0x04
  68
  69 #define LSI_SSTAT0_SDP0   0x01
  70 #define LSI_SSTAT0_RST    0x02
  71 #define LSI_SSTAT0_WOA    0x04
  72 #define LSI_SSTAT0_LOA    0x08
  73 #define LSI_SSTAT0_AIP    0x10
  74 #define LSI_SSTAT0_OLF    0x20
  75 #define LSI_SSTAT0_ORF    0x40
  76 #define LSI_SSTAT0_ILF    0x80
  77
  78 #define LSI_SIST0_PAR     0x01
  79 #define LSI_SIST0_RST     0x02
  80 #define LSI_SIST0_UDC     0x04
  81 #define LSI_SIST0_SGE     0x08
  82 #define LSI_SIST0_RSL     0x10
  83 #define LSI_SIST0_SEL     0x20
  84 #define LSI_SIST0_CMP     0x40
  85 #define LSI_SIST0_MA      0x80
  86
  87 #define LSI_SIST1_HTH     0x01
  88 #define LSI_SIST1_GEN     0x02
  89 #define LSI_SIST1_STO     0x04
  90 #define LSI_SIST1_SBMC    0x10
  91
  92 #define LSI_SOCL_IO       0x01
  93 #define LSI_SOCL_CD       0x02
  94 #define LSI_SOCL_MSG      0x04
  95 #define LSI_SOCL_ATN      0x08
  96 #define LSI_SOCL_SEL      0x10
  97 #define LSI_SOCL_BSY      0x20
  98 #define LSI_SOCL_ACK      0x40
  99 #define LSI_SOCL_REQ      0x80
 100
 101 #define LSI_DSTAT_IID     0x01
 102 #define LSI_DSTAT_SIR     0x04
 103 #define LSI_DSTAT_SSI     0x08
 104 #define LSI_DSTAT_ABRT    0x10
 105 #define LSI_DSTAT_BF      0x20
 106 #define LSI_DSTAT_MDPE    0x40
 107 #define LSI_DSTAT_DFE     0x80
 108
 109 #define LSI_DCNTL_COM     0x01
 110 #define LSI_DCNTL_IRQD    0x02
 111 #define LSI_DCNTL_STD     0x04
 112 #define LSI_DCNTL_IRQM    0x08
 113 #define LSI_DCNTL_SSM     0x10
 114 #define LSI_DCNTL_PFEN    0x20
 115 #define LSI_DCNTL_PFF     0x40
 116 #define LSI_DCNTL_CLSE    0x80
 117
 118 #define LSI_DMODE_MAN     0x01
 119 #define LSI_DMODE_BOF     0x02
 120 #define LSI_DMODE_ERMP    0x04
 121 #define LSI_DMODE_ERL     0x08
 122 #define LSI_DMODE_DIOM    0x10
 123 #define LSI_DMODE_SIOM    0x20
 124
 125 #define LSI_CTEST2_DACK   0x01
 126 #define LSI_CTEST2_DREQ   0x02
 127 #define LSI_CTEST2_TEOP   0x04
 128 #define LSI_CTEST2_PCICIE 0x08
 129 #define LSI_CTEST2_CM     0x10
 130 #define LSI_CTEST2_CIO    0x20
 131 #define LSI_CTEST2_SIGP   0x40
 132 #define LSI_CTEST2_DDIR   0x80
 133
 134 #define LSI_CTEST5_BL2    0x04
 135 #define LSI_CTEST5_DDIR   0x08
 136 #define LSI_CTEST5_MASR   0x10
 137 #define LSI_CTEST5_DFSN   0x20
 138 #define LSI_CTEST5_BBCK   0x40
 139 #define LSI_CTEST5_ADCK   0x80
 140
 141 #define LSI_CCNTL0_DILS   0x01
 142 #define LSI_CCNTL0_DISFC  0x10
 143 #define LSI_CCNTL0_ENNDJ  0x20
 144 #define LSI_CCNTL0_PMJCTL 0x40
 145 #define LSI_CCNTL0_ENPMJ  0x80
 146
 147 #define LSI_CCNTL1_EN64DBMV  0x01
 148 #define LSI_CCNTL1_EN64TIBMV 0x02
 149 #define LSI_CCNTL1_64TIMOD   0x04
 150 #define LSI_CCNTL1_DDAC      0x08
 151 #define LSI_CCNTL1_ZMOD      0x80
 152
 153 #define LSI_CCNTL1_40BIT (LSI_CCNTL1_EN64TIBMV|LSI_CCNTL1_64TIMOD)
 154
 155 #define PHASE_DO          0
 156 #define PHASE_DI          1
 157 #define PHASE_CMD         2
 158 #define PHASE_ST          3
 159 #define PHASE_MO          6
 160 #define PHASE_MI          7
 161 #define PHASE_MASK        7
 162
 163 /* Maximum length of MSG IN data.  */
 164 #define LSI_MAX_MSGIN_LEN 8
 165
 166 /* Flag set if this is a tagged command.  */
 167 #define LSI_TAG_VALID     (1 << 16)
 168
 169 typedef struct {
 170     uint32_t tag;
 171     uint32_t pending;
 172     int out;
 173 } lsi_queue;
 174
 175 typedef struct {
 176     PCIDevice pci_dev;
 177     int mmio_io_addr;
 178     int ram_io_addr;
 179     uint32_t script_ram_base;
 180
 181     int carry; /* ??? Should this be an a visible register somewhere?  */
 182     int sense;
 183     /* Action to take at the end of a MSG IN phase.
 184        0 = COMMAND, 1 = disconect, 2 = DATA OUT, 3 = DATA IN.  */
 185     int msg_action;
 186     int msg_len;
 187     uint8_t msg[LSI_MAX_MSGIN_LEN];
 188     /* 0 if SCRIPTS are running or stopped.
 189      * 1 if a Wait Reselect instruction has been issued.
 190      * 2 if processing DMA from lsi_execute_script.
 191      * 3 if a DMA operation is in progress.  */
 192     int waiting;
 193     SCSIDevice *scsi_dev[LSI_MAX_DEVS];
 194     SCSIDevice *current_dev;
 195     int current_lun;
 196     /* The tag is a combination of the device ID and the SCSI tag.  */
 197     uint32_t current_tag;
 198     uint32_t current_dma_len;
 199     int command_complete;
 200     uint8_t *dma_buf;
 201     lsi_queue *queue;
 202     int queue_len;
 203     int active_commands;
 204
 205     uint32_t dsa;
 206     uint32_t temp;
 207     uint32_t dnad;
 208     uint32_t dbc;
 209     uint8_t istat0;
 210     uint8_t istat1;
 211     uint8_t dcmd;
 212     uint8_t dstat;
 213     uint8_t dien;
 214     uint8_t sist0;
 215     uint8_t sist1;
 216     uint8_t sien0;
 217     uint8_t sien1;
 218     uint8_t mbox0;
 219     uint8_t mbox1;
 220     uint8_t dfifo;
 221     uint8_t ctest2;
 222     uint8_t ctest3;
 223     uint8_t ctest4;
 224     uint8_t ctest5;
 225     uint8_t ccntl0;
 226     uint8_t ccntl1;
 227     uint32_t dsp;
 228     uint32_t dsps;
 229     uint8_t dmode;
 230     uint8_t dcntl;
 231     uint8_t scntl0;
 232     uint8_t scntl1;
 233     uint8_t scntl2;
 234     uint8_t scntl3;
 235     uint8_t sstat0;
 236     uint8_t sstat1;
 237     uint8_t scid;
 238     uint8_t sxfer;
 239     uint8_t socl;
 240     uint8_t sdid;
 241     uint8_t ssid;
 242     uint8_t sfbr;
 243     uint8_t stest1;
 244     uint8_t stest2;
 245     uint8_t stest3;
 246     uint8_t sidl;
 247     uint8_t stime0;
 248     uint8_t respid0;
 249     uint8_t respid1;
 250     uint32_t mmrs;
 251     uint32_t mmws;
 252     uint32_t sfs;
 253     uint32_t drs;
 254     uint32_t sbms;
 255     uint32_t dbms;
 256     uint32_t dnad64;
 257     uint32_t pmjad1;
 258     uint32_t pmjad2;
 259     uint32_t rbc;
 260     uint32_t ua;
 261     uint32_t ia;
 262     uint32_t sbc;
 263     uint32_t csbc;
 264     uint32_t scratch[18]; /* SCRATCHA-SCRATCHR */
 265
 266     /* Script ram is stored as 32-bit words in host byteorder.  */
 267     uint32_t script_ram[2048];
 268 } LSIState;
 269
 270 static void lsi_soft_reset(LSIState *s)
 271 {
 272     DPRINTF("Reset\n");
 273     s->carry = 0;
 274
 275     s->waiting = 0;
 276     s->dsa = 0;
 277     s->dnad = 0;
 278     s->dbc = 0;
 279     s->temp = 0;
 280     memset(s->scratch, 0, sizeof(s->scratch));
 281     s->istat0 = 0;
 282     s->istat1 = 0;
 283     s->dcmd = 0;
 284     s->dstat = 0;
 285     s->dien = 0;
 286     s->sist0 = 0;
 287     s->sist1 = 0;
 288     s->sien0 = 0;
 289     s->sien1 = 0;
 290     s->mbox0 = 0;
 291     s->mbox1 = 0;
 292     s->dfifo = 0;
 293     s->ctest2 = 0;
 294     s->ctest3 = 0;
 295     s->ctest4 = 0;
 296     s->ctest5 = 0;
 297     s->ccntl0 = 0;
 298     s->ccntl1 = 0;
 299     s->dsp = 0;
 300     s->dsps = 0;
 301     s->dmode = 0;
 302     s->dcntl = 0;
 303     s->scntl0 = 0xc0;
 304     s->scntl1 = 0;
 305     s->scntl2 = 0;
 306     s->scntl3 = 0;
 307     s->sstat0 = 0;
 308     s->sstat1 = 0;
 309     s->scid = 7;
 310     s->sxfer = 0;
 311     s->socl = 0;
 312     s->stest1 = 0;
 313     s->stest2 = 0;
 314     s->stest3 = 0;
 315     s->sidl = 0;
 316     s->stime0 = 0;
 317     s->respid0 = 0x80;
 318     s->respid1 = 0;
 319     s->mmrs = 0;
 320     s->mmws = 0;
 321     s->sfs = 0;
 322     s->drs = 0;
 323     s->sbms = 0;
 324     s->dbms = 0;
 325     s->dnad64 = 0;
 326     s->pmjad1 = 0;
 327     s->pmjad2 = 0;
 328     s->rbc = 0;
 329     s->ua = 0;
 330     s->ia = 0;
 331     s->sbc = 0;
 332     s->csbc = 0;
 333 }
 334
 335 static int lsi_dma_40bit(LSIState *s)
 336 {
 337     if ((s->ccntl1 & LSI_CCNTL1_40BIT) == LSI_CCNTL1_40BIT)
 338         return 1;
 339     return 0;
 340 }
 341
 342 static int lsi_dma_ti64bit(LSIState *s)
 343 {
 344     if ((s->ccntl1 & LSI_CCNTL1_EN64TIBMV) == LSI_CCNTL1_EN64TIBMV)
 345         return 1;
 346     return 0;
 347 }
 348
 349 static int lsi_dma_64bit(LSIState *s)
 350 {
 351     if ((s->ccntl1 & LSI_CCNTL1_EN64DBMV) == LSI_CCNTL1_EN64DBMV)
 352         return 1;
 353     return 0;
 354 }
 355
 356 static uint8_t lsi_reg_readb(LSIState *s, int offset);
 357 static void lsi_reg_writeb(LSIState *s, int offset, uint8_t val);
 358 static void lsi_execute_script(LSIState *s);
 359
 360 static inline uint32_t read_dword(LSIState *s, uint32_t addr)
 361 {
 362     uint32_t buf;
 363
 364     /* Optimize reading from SCRIPTS RAM.  */
 365     if ((addr & 0xffffe000) == s->script_ram_base) {
 366         return s->script_ram[(addr & 0x1fff) >> 2];
 367     }
 368     cpu_physical_memory_read(addr, (uint8_t *)&buf, 4);
 369     return cpu_to_le32(buf);
 370 }
 371
 372 static void lsi_stop_script(LSIState *s)
 373 {
 374     s->istat1 &= ~LSI_ISTAT1_SRUN;
 375 }
 376
 377 static void lsi_update_irq(LSIState *s)
 378 {
 379     int level;
 380     static int last_level;
 381
 382     /* It's unclear whether the DIP/SIP bits should be cleared when the
 383        Interrupt Status Registers are cleared or when istat0 is read.
 384        We currently do the formwer, which seems to work.  */
 385     level = 0;
 386     if (s->dstat) {
 387         if (s->dstat & s->dien)
 388             level = 1;
 389         s->istat0 |= LSI_ISTAT0_DIP;
 390     } else {
 391         s->istat0 &= ~LSI_ISTAT0_DIP;
 392     }
 393
 394     if (s->sist0 || s->sist1) {
 395         if ((s->sist0 & s->sien0) || (s->sist1 & s->sien1))
 396             level = 1;
 397         s->istat0 |= LSI_ISTAT0_SIP;
 398     } else {
 399         s->istat0 &= ~LSI_ISTAT0_SIP;
 400     }
 401     if (s->istat0 & LSI_ISTAT0_INTF)
 402         level = 1;
 403
 404     if (level != last_level) {
 405         DPRINTF("Update IRQ level %d dstat %02x sist %02x%02x\n",
 406                 level, s->dstat, s->sist1, s->sist0);
 407         last_level = level;
 408     }
 409     qemu_set_irq(s->pci_dev.irq[0], level);
 410 }
 411
 412 /* Stop SCRIPTS execution and raise a SCSI interrupt.  */
 413 static void lsi_script_scsi_interrupt(LSIState *s, int stat0, int stat1)
 414 {
 415     uint32_t mask0;
 416     uint32_t mask1;
 417
 418     DPRINTF("SCSI Interrupt 0x%02x%02x prev 0x%02x%02x\n",
 419             stat1, stat0, s->sist1, s->sist0);
 420     s->sist0 |= stat0;
 421     s->sist1 |= stat1;
 422     /* Stop processor on fatal or unmasked interrupt.  As a special hack
 423        we don't stop processing when raising STO.  Instead continue
 424        execution and stop at the next insn that accesses the SCSI bus.  */
 425     mask0 = s->sien0 | ~(LSI_SIST0_CMP | LSI_SIST0_SEL | LSI_SIST0_RSL);
 426     mask1 = s->sien1 | ~(LSI_SIST1_GEN | LSI_SIST1_HTH);
 427     mask1 &= ~LSI_SIST1_STO;
 428     if (s->sist0 & mask0 || s->sist1 & mask1) {
 429         lsi_stop_script(s);
 430     }
 431     lsi_update_irq(s);
 432 }
 433
 434 /* Stop SCRIPTS execution and raise a DMA interrupt.  */
 435 static void lsi_script_dma_interrupt(LSIState *s, int stat)
 436 {
 437     DPRINTF("DMA Interrupt 0x%x prev 0x%x\n", stat, s->dstat);
 438     s->dstat |= stat;
 439     lsi_update_irq(s);
 440     lsi_stop_script(s);
 441 }
 442
 443 static inline void lsi_set_phase(LSIState *s, int phase)
 444 {
 445     s->sstat1 = (s->sstat1 & ~PHASE_MASK) | phase;
 446 }
 447
 448 static void lsi_bad_phase(LSIState *s, int out, int new_phase)
 449 {
 450     /* Trigger a phase mismatch.  */
 451     if (s->ccntl0 & LSI_CCNTL0_ENPMJ) {
 452         if ((s->ccntl0 & LSI_CCNTL0_PMJCTL) || out) {
 453             s->dsp = s->pmjad1;
 454         } else {
 455             s->dsp = s->pmjad2;
 456         }
 457         DPRINTF("Data phase mismatch jump to %08x\n", s->dsp);
 458     } else {
 459         DPRINTF("Phase mismatch interrupt\n");
 460         lsi_script_scsi_interrupt(s, LSI_SIST0_MA, 0);
 461         lsi_stop_script(s);
 462     }
 463     lsi_set_phase(s, new_phase);
 464 }
 465
 466
 467 /* Resume SCRIPTS execution after a DMA operation.  */
 468 static void lsi_resume_script(LSIState *s)
 469 {
 470     if (s->waiting != 2) {
 471         s->waiting = 0;
 472         lsi_execute_script(s);
 473     } else {
 474         s->waiting = 0;
 475     }
 476 }
 477
 478 /* Initiate a SCSI layer data transfer.  */
 479 static void lsi_do_dma(LSIState *s, int out)
 480 {
 481     uint32_t count;
 482     target_phys_addr_t addr;
 483
 484     if (!s->current_dma_len) {
 485         /* Wait until data is available.  */
 486         DPRINTF("DMA no data available\n");
 487         return;
 488     }
 489
 490     count = s->dbc;
 491     if (count > s->current_dma_len)
 492         count = s->current_dma_len;
 493
 494     addr = s->dnad;
 495     /* both 40 and Table Indirect 64-bit DMAs store upper bits in dnad64 */
 496     if (lsi_dma_40bit(s) || lsi_dma_ti64bit(s))
 497         addr |= ((uint64_t)s->dnad64 << 32);
 498     else if (s->dbms)
 499         addr |= ((uint64_t)s->dbms << 32);
 500     else if (s->sbms)
 501         addr |= ((uint64_t)s->sbms << 32);
 502
 503     DPRINTF("DMA addr=0x" TARGET_FMT_plx " len=%d\n", addr, count);
 504     s->csbc += count;
 505     s->dnad += count;
 506     s->dbc -= count;
 507
 508     if (s->dma_buf == NULL) {
 509         s->dma_buf = s->current_dev->get_buf(s->current_dev,
 510                                              s->current_tag);
 511     }
 512
 513     /* ??? Set SFBR to first data byte.  */
 514     if (out) {
 515         cpu_physical_memory_read(addr, s->dma_buf, count);
 516     } else {
 517         cpu_physical_memory_write(addr, s->dma_buf, count);
 518     }
 519     s->current_dma_len -= count;
 520     if (s->current_dma_len == 0) {
 521         s->dma_buf = NULL;
 522         if (out) {
 523             /* Write the data.  */
 524             s->current_dev->write_data(s->current_dev, s->current_tag);
 525         } else {
 526             /* Request any remaining data.  */
 527             s->current_dev->read_data(s->current_dev, s->current_tag);
 528         }
 529     } else {
 530         s->dma_buf += count;
 531         lsi_resume_script(s);
 532     }
 533 }
 534
 535
 536 /* Add a command to the queue.  */
 537 static void lsi_queue_command(LSIState *s)
 538 {
 539     lsi_queue *p;
 540
 541     DPRINTF("Queueing tag=0x%x\n", s->current_tag);
 542     if (s->queue_len == s->active_commands) {
 543         s->queue_len++;
 544         s->queue = qemu_realloc(s->queue, s->queue_len * sizeof(lsi_queue));
 545     }
 546     p = &s->queue[s->active_commands++];
 547     p->tag = s->current_tag;
 548     p->pending = 0;
 549     p->out = (s->sstat1 & PHASE_MASK) == PHASE_DO;
 550 }
 551
 552 /* Queue a byte for a MSG IN phase.  */
 553 static void lsi_add_msg_byte(LSIState *s, uint8_t data)
 554 {
 555     if (s->msg_len >= LSI_MAX_MSGIN_LEN) {
 556         BADF("MSG IN data too long\n");
 557     } else {
 558         DPRINTF("MSG IN 0x%02x\n", data);
 559         s->msg[s->msg_len++] = data;
 560     }
 561 }
 562
 563 /* Perform reselection to continue a command.  */
 564 static void lsi_reselect(LSIState *s, uint32_t tag)
 565 {
 566     lsi_queue *p;
 567     int n;
 568     int id;
 569
 570     p = NULL;
 571     for (n = 0; n < s->active_commands; n++) {
 572         p = &s->queue[n];
 573         if (p->tag == tag)
 574             break;
 575     }
 576     if (n == s->active_commands) {
 577         BADF("Reselected non-existant command tag=0x%x\n", tag);
 578         return;
 579     }
 580     id = (tag >> 8) & 0xf;
 581     s->ssid = id | 0x80;
 582     DPRINTF("Reselected target %d\n", id);
 583     s->current_dev = s->scsi_dev[id];
 584     s->current_tag = tag;
 585     s->scntl1 |= LSI_SCNTL1_CON;
 586     lsi_set_phase(s, PHASE_MI);
 587     s->msg_action = p->out ? 2 : 3;
 588     s->current_dma_len = p->pending;
 589     s->dma_buf = NULL;
 590     lsi_add_msg_byte(s, 0x80);
 591     if (s->current_tag & LSI_TAG_VALID) {
 592         lsi_add_msg_byte(s, 0x20);
 593         lsi_add_msg_byte(s, tag & 0xff);
 594     }
 595
 596     s->active_commands--;
 597     if (n != s->active_commands) {
 598         s->queue[n] = s->queue[s->active_commands];
 599     }
 600 }
 601
 602 /* Record that data is available for a queued command.  Returns zero if
 603    the device was reselected, nonzero if the IO is deferred.  */
 604 static int lsi_queue_tag(LSIState *s, uint32_t tag, uint32_t arg)
 605 {
 606     lsi_queue *p;
 607     int i;
 608     for (i = 0; i < s->active_commands; i++) {
 609         p = &s->queue[i];
 610         if (p->tag == tag) {
 611             if (p->pending) {
 612                 BADF("Multiple IO pending for tag %d\n", tag);
 613             }
 614             p->pending = arg;
 615             if (s->waiting == 1) {
 616                 /* Reselect device.  */
 617                 lsi_reselect(s, tag);
 618                 return 0;
 619             } else {
 620                DPRINTF("Queueing IO tag=0x%x\n", tag);
 621                 p->pending = arg;
 622                 return 1;
 623             }
 624         }
 625     }
 626     BADF("IO with unknown tag %d\n", tag);
 627     return 1;
 628 }
 629
 630 /* Callback to indicate that the SCSI layer has completed a transfer.  */
 631 static void lsi_command_complete(void *opaque, int reason, uint32_t tag,
 632                                  uint32_t arg)
 633 {
 634     LSIState *s = (LSIState *)opaque;
 635     int out;
 636
 637     out = (s->sstat1 & PHASE_MASK) == PHASE_DO;
 638     if (reason == SCSI_REASON_DONE) {
 639         DPRINTF("Command complete sense=%d\n", (int)arg);
 640         s->sense = arg;
 641         s->command_complete = 2;
 642         if (s->waiting && s->dbc != 0) {
 643             /* Raise phase mismatch for short transfers.  */
 644             lsi_bad_phase(s, out, PHASE_ST);
 645         } else {
 646             lsi_set_phase(s, PHASE_ST);
 647         }
 648         lsi_resume_script(s);
 649         return;
 650     }
 651
 652     if (s->waiting == 1 || tag != s->current_tag) {
 653         if (lsi_queue_tag(s, tag, arg))
 654             return;
 655     }
 656     DPRINTF("Data ready tag=0x%x len=%d\n", tag, arg);
 657     s->current_dma_len = arg;
 658     s->command_complete = 1;
 659     if (!s->waiting)
 660         return;
 661     if (s->waiting == 1 || s->dbc == 0) {
 662         lsi_resume_script(s);
 663     } else {
 664         lsi_do_dma(s, out);
 665     }
 666 }
 667
 668 static void lsi_do_command(LSIState *s)
 669 {
 670     uint8_t buf[16];
 671     int n;
 672
 673     DPRINTF("Send command len=%d\n", s->dbc);
 674     if (s->dbc > 16)
 675         s->dbc = 16;
 676     cpu_physical_memory_read(s->dnad, buf, s->dbc);
 677     s->sfbr = buf[0];
 678     s->command_complete = 0;
 679     n = s->current_dev->send_command(s->current_dev, s->current_tag, buf,
 680                                      s->current_lun);
 681     if (n > 0) {
 682         lsi_set_phase(s, PHASE_DI);
 683         s->current_dev->read_data(s->current_dev, s->current_tag);
 684     } else if (n < 0) {
 685         lsi_set_phase(s, PHASE_DO);
 686         s->current_dev->write_data(s->current_dev, s->current_tag);
 687     }
 688
 689     if (!s->command_complete) {
 690         if (n) {
 691             /* Command did not complete immediately so disconnect.  */
 692             lsi_add_msg_byte(s, 2); /* SAVE DATA POINTER */
 693             lsi_add_msg_byte(s, 4); /* DISCONNECT */
 694             /* wait data */
 695             lsi_set_phase(s, PHASE_MI);
 696             s->msg_action = 1;
 697             lsi_queue_command(s);
 698         } else {
 699             /* wait command complete */
 700             lsi_set_phase(s, PHASE_DI);
 701         }
 702     }
 703 }
 704
 705 static void lsi_do_status(LSIState *s)
 706 {
 707     uint8_t sense;
 708     DPRINTF("Get status len=%d sense=%d\n", s->dbc, s->sense);
 709     if (s->dbc != 1)
 710         BADF("Bad Status move\n");
 711     s->dbc = 1;
 712     sense = s->sense;
 713     s->sfbr = sense;
 714     cpu_physical_memory_write(s->dnad, &sense, 1);
 715     lsi_set_phase(s, PHASE_MI);
 716     s->msg_action = 1;
 717     lsi_add_msg_byte(s, 0); /* COMMAND COMPLETE */
 718 }
 719
 720 static void lsi_disconnect(LSIState *s)
 721 {
 722     s->scntl1 &= ~LSI_SCNTL1_CON;
 723     s->sstat1 &= ~PHASE_MASK;
 724 }
 725
 726 static void lsi_do_msgin(LSIState *s)
 727 {
 728     int len;
 729     DPRINTF("Message in len=%d/%d\n", s->dbc, s->msg_len);
 730     s->sfbr = s->msg[0];
 731     len = s->msg_len;
 732     if (len > s->dbc)
 733         len = s->dbc;
 734     cpu_physical_memory_write(s->dnad, s->msg, len);
 735     /* Linux drivers rely on the last byte being in the SIDL.  */
 736     s->sidl = s->msg[len - 1];
 737     s->msg_len -= len;
 738     if (s->msg_len) {
 739         memmove(s->msg, s->msg + len, s->msg_len);
 740     } else {
 741         /* ??? Check if ATN (not yet implemented) is asserted and maybe
 742            switch to PHASE_MO.  */
 743         switch (s->msg_action) {
 744         case 0:
 745             lsi_set_phase(s, PHASE_CMD);
 746             break;
 747         case 1:
 748             lsi_disconnect(s);
 749             break;
 750         case 2:
 751             lsi_set_phase(s, PHASE_DO);
 752             break;
 753         case 3:
 754             lsi_set_phase(s, PHASE_DI);
 755             break;
 756         default:
 757             abort();
 758         }
 759     }
 760 }
 761
 762 /* Read the next byte during a MSGOUT phase.  */
 763 static uint8_t lsi_get_msgbyte(LSIState *s)
 764 {
 765     uint8_t data;
 766     cpu_physical_memory_read(s->dnad, &data, 1);
 767     s->dnad++;
 768     s->dbc--;
 769     return data;
 770 }
 771
 772 static void lsi_do_msgout(LSIState *s)
 773 {
 774     uint8_t msg;
 775     int len;
 776
 777     DPRINTF("MSG out len=%d\n", s->dbc);
 778     while (s->dbc) {
 779         msg = lsi_get_msgbyte(s);
 780         s->sfbr = msg;
 781
 782         switch (msg) {
 783         case 0x00:
 784             DPRINTF("MSG: Disconnect\n");
 785             lsi_disconnect(s);
 786             break;
 787         case 0x08:
 788             DPRINTF("MSG: No Operation\n");
 789             lsi_set_phase(s, PHASE_CMD);
 790             break;
 791         case 0x01:
 792             len = lsi_get_msgbyte(s);
 793             msg = lsi_get_msgbyte(s);
 794             DPRINTF("Extended message 0x%x (len %d)\n", msg, len);
 795             switch (msg) {
 796             case 1:
 797                 DPRINTF("SDTR (ignored)\n");
 798                 s->dbc -= 2;
 799                 break;
 800             case 3:
 801                 DPRINTF("WDTR (ignored)\n");
 802                 s->dbc -= 1;
 803                 break;
 804             default:
 805                 goto bad;
 806             }
 807             break;
 808         case 0x20: /* SIMPLE queue */
 809             s->current_tag |= lsi_get_msgbyte(s) | LSI_TAG_VALID;
 810             DPRINTF("SIMPLE queue tag=0x%x\n", s->current_tag & 0xff);
 811             break;
 812         case 0x21: /* HEAD of queue */
 813             BADF("HEAD queue not implemented\n");
 814             s->current_tag |= lsi_get_msgbyte(s) | LSI_TAG_VALID;
 815             break;
 816         case 0x22: /* ORDERED queue */
 817             BADF("ORDERED queue not implemented\n");
 818             s->current_tag |= lsi_get_msgbyte(s) | LSI_TAG_VALID;
 819             break;
 820         default:
 821             if ((msg & 0x80) == 0) {
 822                 goto bad;
 823             }
 824             s->current_lun = msg & 7;
 825             DPRINTF("Select LUN %d\n", s->current_lun);
 826             lsi_set_phase(s, PHASE_CMD);
 827             break;
 828         }
 829     }
 830     return;
 831 bad:
 832     BADF("Unimplemented message 0x%02x\n", msg);
 833     lsi_set_phase(s, PHASE_MI);
 834     lsi_add_msg_byte(s, 7); /* MESSAGE REJECT */
 835     s->msg_action = 0;
 836 }
 837
 838 /* Sign extend a 24-bit value.  */
 839 static inline int32_t sxt24(int32_t n)
 840 {
 841     return (n << 8) >> 8;
 842 }
 843
 844 static void lsi_memcpy(LSIState *s, uint32_t dest, uint32_t src, int count)
 845 {
 846     int n;
 847     uint8_t buf[TARGET_PAGE_SIZE];
 848
 849     DPRINTF("memcpy dest 0x%08x src 0x%08x count %d\n", dest, src, count);
 850     while (count) {
 851         n = (count > TARGET_PAGE_SIZE) ? TARGET_PAGE_SIZE : count;
 852         cpu_physical_memory_read(src, buf, n);
 853         cpu_physical_memory_write(dest, buf, n);
 854         src += n;
 855         dest += n;
 856         count -= n;
 857     }
 858 }
 859
 860 static void lsi_wait_reselect(LSIState *s)
 861 {
 862     int i;
 863     DPRINTF("Wait Reselect\n");
 864     if (s->current_dma_len)
 865         BADF("Reselect with pending DMA\n");
 866     for (i = 0; i < s->active_commands; i++) {
 867         if (s->queue[i].pending) {
 868             lsi_reselect(s, s->queue[i].tag);
 869             break;
 870         }
 871     }
 872     if (s->current_dma_len == 0) {
 873         s->waiting = 1;
 874     }
 875 }
 876
 877 static void lsi_execute_script(LSIState *s)
 878 {
 879     uint32_t insn;
 880     uint32_t addr, addr_high;
 881     int opcode;
 882     int insn_processed = 0;
 883
 884     s->istat1 |= LSI_ISTAT1_SRUN;
 885 again:
 886     insn_processed++;
 887     insn = read_dword(s, s->dsp);
 888     if (!insn) {
 889         /* If we receive an empty opcode increment the DSP by 4 bytes
 890            instead of 8 and execute the next opcode at that location */
 891         s->dsp += 4;
 892         goto again;
 893     }
 894     addr = read_dword(s, s->dsp + 4);
 895     addr_high = 0;
 896     DPRINTF("SCRIPTS dsp=%08x opcode %08x arg %08x\n", s->dsp, insn, addr);
 897     s->dsps = addr;
 898     s->dcmd = insn >> 24;
 899     s->dsp += 8;
 900     switch (insn >> 30) {
 901     case 0: /* Block move.  */
 902         if (s->sist1 & LSI_SIST1_STO) {
 903             DPRINTF("Delayed select timeout\n");
 904             lsi_stop_script(s);
 905             break;
 906         }
 907         s->dbc = insn & 0xffffff;
 908         s->rbc = s->dbc;
 909         /* ??? Set ESA.  */
 910         s->ia = s->dsp - 8;
 911         if (insn & (1 << 29)) {
 912             /* Indirect addressing.  */
 913             addr = read_dword(s, addr);
 914         } else if (insn & (1 << 28)) {
 915             uint32_t buf[2];
 916             int32_t offset;
 917             /* Table indirect addressing.  */
 918
 919             /* 32-bit Table indirect */
 920             offset = sxt24(addr);
 921             cpu_physical_memory_read(s->dsa + offset, (uint8_t *)buf, 8);
 922             /* byte count is stored in bits 0:23 only */
 923             s->dbc = cpu_to_le32(buf[0]) & 0xffffff;
 924             s->rbc = s->dbc;
 925             addr = cpu_to_le32(buf[1]);
 926
 927             /* 40-bit DMA, upper addr bits [39:32] stored in first DWORD of
 928              * table, bits [31:24] */
 929             if (lsi_dma_40bit(s))
 930                 addr_high = cpu_to_le32(buf[0]) >> 24;
 931             else if (lsi_dma_ti64bit(s)) {
 932                 int selector = (cpu_to_le32(buf[0]) >> 24) & 0x1f;
 933                 switch (selector) {
 934                 case 0 ... 0x0f:
 935                     /* offset index into scratch registers since
 936                      * TI64 mode can use registers C to R */
 937                     addr_high = s->scratch[2 + selector];
 938                     break;
 939                 case 0x10:
 940                     addr_high = s->mmrs;
 941                     break;
 942                 case 0x11:
 943                     addr_high = s->mmws;
 944                     break;
 945                 case 0x12:
 946                     addr_high = s->sfs;
 947                     break;
 948                 case 0x13:
 949                     addr_high = s->drs;
 950                     break;
 951                 case 0x14:
 952                     addr_high = s->sbms;
 953                     break;
 954                 case 0x15:
 955                     addr_high = s->dbms;
 956                     break;
 957                 default:
 958                     BADF("Illegal selector specified (0x%x > 0x15)"
 959                          " for 64-bit DMA block move", selector);
 960                     break;
 961                 }
 962             }
 963         } else if (lsi_dma_64bit(s)) {
 964             /* fetch a 3rd dword if 64-bit direct move is enabled and
 965                only if we're not doing table indirect or indirect addressing */
 966             s->dbms = read_dword(s, s->dsp);
 967             s->dsp += 4;
 968             s->ia = s->dsp - 12;
 969         }
 970         if ((s->sstat1 & PHASE_MASK) != ((insn >> 24) & 7)) {
 971             DPRINTF("Wrong phase got %d expected %d\n",
 972                     s->sstat1 & PHASE_MASK, (insn >> 24) & 7);
 973             lsi_script_scsi_interrupt(s, LSI_SIST0_MA, 0);
 974             break;
 975         }
 976         s->dnad = addr;
 977         s->dnad64 = addr_high;
 978         switch (s->sstat1 & 0x7) {
 979         case PHASE_DO:
 980             s->waiting = 2;
 981             lsi_do_dma(s, 1);
 982             if (s->waiting)
 983                 s->waiting = 3;
 984             break;
 985         case PHASE_DI:
 986             s->waiting = 2;
 987             lsi_do_dma(s, 0);
 988             if (s->waiting)
 989                 s->waiting = 3;
 990             break;
 991         case PHASE_CMD:
 992             lsi_do_command(s);
 993             break;
 994         case PHASE_ST:
 995             lsi_do_status(s);
 996             break;
 997         case PHASE_MO:
 998             lsi_do_msgout(s);
 999             break;
1000         case PHASE_MI:
1001             lsi_do_msgin(s);
1002             break;
1003         default:
1004             BADF("Unimplemented phase %d\n", s->sstat1 & PHASE_MASK);
1005             exit(1);
1006         }
1007         s->dfifo = s->dbc & 0xff;
1008         s->ctest5 = (s->ctest5 & 0xfc) | ((s->dbc >> 8) & 3);
1009         s->sbc = s->dbc;
1010         s->rbc -= s->dbc;
1011         s->ua = addr + s->dbc;
1012         break;
1013
1014     case 1: /* IO or Read/Write instruction.  */
1015         opcode = (insn >> 27) & 7;
1016         if (opcode < 5) {
1017             uint32_t id;
1018
1019             if (insn & (1 << 25)) {
1020                 id = read_dword(s, s->dsa + sxt24(insn));
1021             } else {
1022                 id = addr;
1023             }
1024             id = (id >> 16) & 0xf;
1025             if (insn & (1 << 26)) {
1026                 addr = s->dsp + sxt24(addr);
1027             }
1028             s->dnad = addr;
1029             switch (opcode) {
1030             case 0: /* Select */
1031                 s->sdid = id;
1032                 if (s->current_dma_len && (s->ssid & 0xf) == id) {
1033                     DPRINTF("Already reselected by target %d\n", id);
1034                     break;
1035                 }
1036                 s->sstat0 |= LSI_SSTAT0_WOA;
1037                 s->scntl1 &= ~LSI_SCNTL1_IARB;
1038                 if (id >= LSI_MAX_DEVS || !s->scsi_dev[id]) {
1039                     DPRINTF("Selected absent target %d\n", id);
1040                     lsi_script_scsi_interrupt(s, 0, LSI_SIST1_STO);
1041                     lsi_disconnect(s);
1042                     break;
1043                 }
1044                 DPRINTF("Selected target %d%s\n",
1045                         id, insn & (1 << 3) ? " ATN" : "");
1046                 /* ??? Linux drivers compain when this is set.  Maybe
1047                    it only applies in low-level mode (unimplemented).
1048                 lsi_script_scsi_interrupt(s, LSI_SIST0_CMP, 0); */
1049                 s->current_dev = s->scsi_dev[id];
1050                 s->current_tag = id << 8;
1051                 s->scntl1 |= LSI_SCNTL1_CON;
1052                 if (insn & (1 << 3)) {
1053                     s->socl |= LSI_SOCL_ATN;
1054                 }
1055                 lsi_set_phase(s, PHASE_MO);
1056                 break;
1057             case 1: /* Disconnect */
1058                 DPRINTF("Wait Disconect\n");
1059                 s->scntl1 &= ~LSI_SCNTL1_CON;
1060                 break;
1061             case 2: /* Wait Reselect */
1062                 lsi_wait_reselect(s);
1063                 break;
1064             case 3: /* Set */
1065                 DPRINTF("Set%s%s%s%s\n",
1066                         insn & (1 << 3) ? " ATN" : "",
1067                         insn & (1 << 6) ? " ACK" : "",
1068                         insn & (1 << 9) ? " TM" : "",
1069                         insn & (1 << 10) ? " CC" : "");
1070                 if (insn & (1 << 3)) {
1071                     s->socl |= LSI_SOCL_ATN;
1072                     lsi_set_phase(s, PHASE_MO);
1073                 }
1074                 if (insn & (1 << 9)) {
1075                     BADF("Target mode not implemented\n");
1076                     exit(1);
1077                 }
1078                 if (insn & (1 << 10))
1079                     s->carry = 1;
1080                 break;
1081             case 4: /* Clear */
1082                 DPRINTF("Clear%s%s%s%s\n",
1083                         insn & (1 << 3) ? " ATN" : "",
1084                         insn & (1 << 6) ? " ACK" : "",
1085                         insn & (1 << 9) ? " TM" : "",
1086                         insn & (1 << 10) ? " CC" : "");
1087                 if (insn & (1 << 3)) {
1088                     s->socl &= ~LSI_SOCL_ATN;
1089                 }
1090                 if (insn & (1 << 10))
1091                     s->carry = 0;
1092                 break;
1093             }
1094         } else {
1095             uint8_t op0;
1096             uint8_t op1;
1097             uint8_t data8;
1098             int reg;
1099             int operator;
1100 #ifdef DEBUG_LSI
1101             static const char *opcode_names[3] =
1102                 {"Write", "Read", "Read-Modify-Write"};
1103             static const char *operator_names[8] =
1104                 {"MOV", "SHL", "OR", "XOR", "AND", "SHR", "ADD", "ADC"};
1105 #endif
1106
1107             reg = ((insn >> 16) & 0x7f) | (insn & 0x80);
1108             data8 = (insn >> 8) & 0xff;
1109             opcode = (insn >> 27) & 7;
1110             operator = (insn >> 24) & 7;
1111             DPRINTF("%s reg 0x%x %s data8=0x%02x sfbr=0x%02x%s\n",
1112                     opcode_names[opcode - 5], reg,
1113                     operator_names[operator], data8, s->sfbr,
1114                     (insn & (1 << 23)) ? " SFBR" : "");
1115             op0 = op1 = 0;
1116             switch (opcode) {
1117             case 5: /* From SFBR */
1118                 op0 = s->sfbr;
1119                 op1 = data8;
1120                 break;
1121             case 6: /* To SFBR */
1122                 if (operator)
1123                     op0 = lsi_reg_readb(s, reg);
1124                 op1 = data8;
1125                 break;
1126             case 7: /* Read-modify-write */
1127                 if (operator)
1128                     op0 = lsi_reg_readb(s, reg);
1129                 if (insn & (1 << 23)) {
1130                     op1 = s->sfbr;
1131                 } else {
1132                     op1 = data8;
1133                 }
1134                 break;
1135             }
1136
1137             switch (operator) {
1138             case 0: /* move */
1139                 op0 = op1;
1140                 break;
1141             case 1: /* Shift left */
1142                 op1 = op0 >> 7;
1143                 op0 = (op0 << 1) | s->carry;
1144                 s->carry = op1;
1145                 break;
1146             case 2: /* OR */
1147                 op0 |= op1;
1148                 break;
1149             case 3: /* XOR */
1150                 op0 ^= op1;
1151                 break;
1152             case 4: /* AND */
1153                 op0 &= op1;
1154                 break;
1155             case 5: /* SHR */
1156                 op1 = op0 & 1;
1157                 op0 = (op0 >> 1) | (s->carry << 7);
1158                 s->carry = op1;
1159                 break;
1160             case 6: /* ADD */
1161                 op0 += op1;
1162                 s->carry = op0 < op1;
1163                 break;
1164             case 7: /* ADC */
1165                 op0 += op1 + s->carry;
1166                 if (s->carry)
1167                     s->carry = op0 <= op1;
1168                 else
1169                     s->carry = op0 < op1;
1170                 break;
1171             }
1172
1173             switch (opcode) {
1174             case 5: /* From SFBR */
1175             case 7: /* Read-modify-write */
1176                 lsi_reg_writeb(s, reg, op0);
1177                 break;
1178             case 6: /* To SFBR */
1179                 s->sfbr = op0;
1180                 break;
1181             }
1182         }
1183         break;
1184
1185     case 2: /* Transfer Control.  */
1186         {
1187             int cond;
1188             int jmp;
1189
1190             if ((insn & 0x002e0000) == 0) {
1191                 DPRINTF("NOP\n");
1192                 break;
1193             }
1194             if (s->sist1 & LSI_SIST1_STO) {
1195                 DPRINTF("Delayed select timeout\n");
1196                 lsi_stop_script(s);
1197                 break;
1198             }
1199             cond = jmp = (insn & (1 << 19)) != 0;
1200             if (cond == jmp && (insn & (1 << 21))) {
1201                 DPRINTF("Compare carry %d\n", s->carry == jmp);
1202                 cond = s->carry != 0;
1203             }
1204             if (cond == jmp && (insn & (1 << 17))) {
1205                 DPRINTF("Compare phase %d %c= %d\n",
1206                         (s->sstat1 & PHASE_MASK),
1207                         jmp ? '=' : '!',
1208                         ((insn >> 24) & 7));
1209                 cond = (s->sstat1 & PHASE_MASK) == ((insn >> 24) & 7);
1210             }
1211             if (cond == jmp && (insn & (1 << 18))) {
1212                 uint8_t mask;
1213
1214                 mask = (~insn >> 8) & 0xff;
1215                 DPRINTF("Compare data 0x%x & 0x%x %c= 0x%x\n",
1216                         s->sfbr, mask, jmp ? '=' : '!', insn & mask);
1217                 cond = (s->sfbr & mask) == (insn & mask);
1218             }
1219             if (cond == jmp) {
1220                 if (insn & (1 << 23)) {
1221                     /* Relative address.  */
1222                     addr = s->dsp + sxt24(addr);
1223                 }
1224                 switch ((insn >> 27) & 7) {
1225                 case 0: /* Jump */
1226                     DPRINTF("Jump to 0x%08x\n", addr);
1227                     s->dsp = addr;
1228                     break;
1229                 case 1: /* Call */
1230                     DPRINTF("Call 0x%08x\n", addr);
1231                     s->temp = s->dsp;
1232                     s->dsp = addr;
1233                     break;
1234                 case 2: /* Return */
1235                     DPRINTF("Return to 0x%08x\n", s->temp);
1236                     s->dsp = s->temp;
1237                     break;
1238                 case 3: /* Interrupt */
1239                     DPRINTF("Interrupt 0x%08x\n", s->dsps);
1240                     if ((insn & (1 << 20)) != 0) {
1241                         s->istat0 |= LSI_ISTAT0_INTF;
1242                         lsi_update_irq(s);
1243                     } else {
1244                         lsi_script_dma_interrupt(s, LSI_DSTAT_SIR);
1245                     }
1246                     break;
1247                 default:
1248                     DPRINTF("Illegal transfer control\n");
1249                     lsi_script_dma_interrupt(s, LSI_DSTAT_IID);
1250                     break;
1251                 }
1252             } else {
1253                 DPRINTF("Control condition failed\n");
1254             }
1255         }
1256         break;
1257
1258     case 3:
1259         if ((insn & (1 << 29)) == 0) {
1260             /* Memory move.  */
1261             uint32_t dest;
1262             /* ??? The docs imply the destination address is loaded into
1263                the TEMP register.  However the Linux drivers rely on
1264                the value being presrved.  */
1265             dest = read_dword(s, s->dsp);
1266             s->dsp += 4;
1267             lsi_memcpy(s, dest, addr, insn & 0xffffff);
1268         } else {
1269             uint8_t data[7];
1270             int reg;
1271             int n;
1272             int i;
1273
1274             if (insn & (1 << 28)) {
1275                 addr = s->dsa + sxt24(addr);
1276             }
1277             n = (insn & 7);
1278             reg = (insn >> 16) & 0xff;
1279             if (insn & (1 << 24)) {
1280                 cpu_physical_memory_read(addr, data, n);
1281                 DPRINTF("Load reg 0x%x size %d addr 0x%08x = %08x\n", reg, n,
1282                         addr, *(int *)data);
1283                 for (i = 0; i < n; i++) {
1284                     lsi_reg_writeb(s, reg + i, data[i]);
1285                 }
1286             } else {
1287                 DPRINTF("Store reg 0x%x size %d addr 0x%08x\n", reg, n, addr);
1288                 for (i = 0; i < n; i++) {
1289                     data[i] = lsi_reg_readb(s, reg + i);
1290                 }
1291                 cpu_physical_memory_write(addr, data, n);
1292             }
1293         }
1294     }
1295     if (insn_processed > 10000 && !s->waiting) {
1296         /* Some windows drivers make the device spin waiting for a memory
1297            location to change.  If we have been executed a lot of code then
1298            assume this is the case and force an unexpected device disconnect.
1299            This is apparently sufficient to beat the drivers into submission.
1300          */
1301         if (!(s->sien0 & LSI_SIST0_UDC))
1302             fprintf(stderr, "inf. loop with UDC masked\n");
1303         lsi_script_scsi_interrupt(s, LSI_SIST0_UDC, 0);
1304         lsi_disconnect(s);
1305     } else if (s->istat1 & LSI_ISTAT1_SRUN && !s->waiting) {
1306         if (s->dcntl & LSI_DCNTL_SSM) {
1307             lsi_script_dma_interrupt(s, LSI_DSTAT_SSI);
1308         } else {
1309             goto again;
1310         }
1311     }
1312     DPRINTF("SCRIPTS execution stopped\n");
1313 }
1314
1315 static uint8_t lsi_reg_readb(LSIState *s, int offset)
1316 {
1317     uint8_t tmp;
1318 #define CASE_GET_REG32(name, addr) \
1319     case addr: return s->name & 0xff; \
1320     case addr + 1: return (s->name >> 8) & 0xff; \
1321     case addr + 2: return (s->name >> 16) & 0xff; \
1322     case addr + 3: return (s->name >> 24) & 0xff;
1323
1324 #ifdef DEBUG_LSI_REG
1325     DPRINTF("Read reg %x\n", offset);
1326 #endif
1327     switch (offset) {
1328     case 0x00: /* SCNTL0 */
1329         return s->scntl0;
1330     case 0x01: /* SCNTL1 */
1331         return s->scntl1;
1332     case 0x02: /* SCNTL2 */
1333         return s->scntl2;
1334     case 0x03: /* SCNTL3 */
1335         return s->scntl3;
1336     case 0x04: /* SCID */
1337         return s->scid;
1338     case 0x05: /* SXFER */
1339         return s->sxfer;
1340     case 0x06: /* SDID */
1341         return s->sdid;
1342     case 0x07: /* GPREG0 */
1343         return 0x7f;
1344     case 0x08: /* Revision ID */
1345         return 0x00;
1346     case 0xa: /* SSID */
1347         return s->ssid;
1348     case 0xb: /* SBCL */
1349         /* ??? This is not correct. However it's (hopefully) only
1350            used for diagnostics, so should be ok.  */
1351         return 0;
1352     case 0xc: /* DSTAT */
1353         tmp = s->dstat | 0x80;
1354         if ((s->istat0 & LSI_ISTAT0_INTF) == 0)
1355             s->dstat = 0;
1356         lsi_update_irq(s);
1357         return tmp;
1358     case 0x0d: /* SSTAT0 */
1359         return s->sstat0;
1360     case 0x0e: /* SSTAT1 */
1361         return s->sstat1;
1362     case 0x0f: /* SSTAT2 */
1363         return s->scntl1 & LSI_SCNTL1_CON ? 0 : 2;
1364     CASE_GET_REG32(dsa, 0x10)
1365     case 0x14: /* ISTAT0 */
1366         return s->istat0;
1367     case 0x16: /* MBOX0 */
1368         return s->mbox0;
1369     case 0x17: /* MBOX1 */
1370         return s->mbox1;
1371     case 0x18: /* CTEST0 */
1372         return 0xff;
1373     case 0x19: /* CTEST1 */
1374         return 0;
1375     case 0x1a: /* CTEST2 */
1376         tmp = s->ctest2 | LSI_CTEST2_DACK | LSI_CTEST2_CM;
1377         if (s->istat0 & LSI_ISTAT0_SIGP) {
1378             s->istat0 &= ~LSI_ISTAT0_SIGP;
1379             tmp |= LSI_CTEST2_SIGP;
1380         }
1381         return tmp;
1382     case 0x1b: /* CTEST3 */
1383         return s->ctest3;
1384     CASE_GET_REG32(temp, 0x1c)
1385     case 0x20: /* DFIFO */
1386         return 0;
1387     case 0x21: /* CTEST4 */
1388         return s->ctest4;
1389     case 0x22: /* CTEST5 */
1390         return s->ctest5;
1391     case 0x23: /* CTEST6 */
1392          return 0;
1393     case 0x24: /* DBC[0:7] */
1394         return s->dbc & 0xff;
1395     case 0x25: /* DBC[8:15] */
1396         return (s->dbc >> 8) & 0xff;
1397     case 0x26: /* DBC[16->23] */
1398         return (s->dbc >> 16) & 0xff;
1399     case 0x27: /* DCMD */
1400         return s->dcmd;
1401     CASE_GET_REG32(dsp, 0x2c)
1402     CASE_GET_REG32(dsps, 0x30)
1403     CASE_GET_REG32(scratch[0], 0x34)
1404     case 0x38: /* DMODE */
1405         return s->dmode;
1406     case 0x39: /* DIEN */
1407         return s->dien;
1408     case 0x3b: /* DCNTL */
1409         return s->dcntl;
1410     case 0x40: /* SIEN0 */
1411         return s->sien0;
1412     case 0x41: /* SIEN1 */
1413         return s->sien1;
1414     case 0x42: /* SIST0 */
1415         tmp = s->sist0;
1416         s->sist0 = 0;
1417         lsi_update_irq(s);
1418         return tmp;
1419     case 0x43: /* SIST1 */
1420         tmp = s->sist1;
1421         s->sist1 = 0;
1422         lsi_update_irq(s);
1423         return tmp;
1424     case 0x46: /* MACNTL */
1425         return 0x0f;
1426     case 0x47: /* GPCNTL0 */
1427         return 0x0f;
1428     case 0x48: /* STIME0 */
1429         return s->stime0;
1430     case 0x4a: /* RESPID0 */
1431         return s->respid0;
1432     case 0x4b: /* RESPID1 */
1433         return s->respid1;
1434     case 0x4d: /* STEST1 */
1435         return s->stest1;
1436     case 0x4e: /* STEST2 */
1437         return s->stest2;
1438     case 0x4f: /* STEST3 */
1439         return s->stest3;
1440     case 0x50: /* SIDL */
1441         /* This is needed by the linux drivers.  We currently only update it
1442            during the MSG IN phase.  */
1443         return s->sidl;
1444     case 0x52: /* STEST4 */
1445         return 0xe0;
1446     case 0x56: /* CCNTL0 */
1447         return s->ccntl0;
1448     case 0x57: /* CCNTL1 */
1449         return s->ccntl1;
1450     case 0x58: /* SBDL */
1451         /* Some drivers peek at the data bus during the MSG IN phase.  */
1452         if ((s->sstat1 & PHASE_MASK) == PHASE_MI)
1453             return s->msg[0];
1454         return 0;
1455     case 0x59: /* SBDL high */
1456         return 0;
1457     CASE_GET_REG32(mmrs, 0xa0)
1458     CASE_GET_REG32(mmws, 0xa4)
1459     CASE_GET_REG32(sfs, 0xa8)
1460     CASE_GET_REG32(drs, 0xac)
1461     CASE_GET_REG32(sbms, 0xb0)
1462     CASE_GET_REG32(dbms, 0xb4)
1463     CASE_GET_REG32(dnad64, 0xb8)
1464     CASE_GET_REG32(pmjad1, 0xc0)
1465     CASE_GET_REG32(pmjad2, 0xc4)
1466     CASE_GET_REG32(rbc, 0xc8)
1467     CASE_GET_REG32(ua, 0xcc)
1468     CASE_GET_REG32(ia, 0xd4)
1469     CASE_GET_REG32(sbc, 0xd8)
1470     CASE_GET_REG32(csbc, 0xdc)
1471     }
1472     if (offset >= 0x5c && offset < 0xa0) {
1473         int n;
1474         int shift;
1475         n = (offset - 0x58) >> 2;
1476         shift = (offset & 3) * 8;
1477         return (s->scratch[n] >> shift) & 0xff;
1478     }
1479     BADF("readb 0x%x\n", offset);
1480     exit(1);
1481 #undef CASE_GET_REG32
1482 }
1483
1484 static void lsi_reg_writeb(LSIState *s, int offset, uint8_t val)
1485 {
1486 #define CASE_SET_REG32(name, addr) \
1487     case addr    : s->name &= 0xffffff00; s->name |= val;       break; \
1488     case addr + 1: s->name &= 0xffff00ff; s->name |= val << 8;  break; \
1489     case addr + 2: s->name &= 0xff00ffff; s->name |= val << 16; break; \
1490     case addr + 3: s->name &= 0x00ffffff; s->name |= val << 24; break;
1491
1492 #ifdef DEBUG_LSI_REG
1493     DPRINTF("Write reg %x = %02x\n", offset, val);
1494 #endif
1495     switch (offset) {
1496     case 0x00: /* SCNTL0 */
1497         s->scntl0 = val;
1498         if (val & LSI_SCNTL0_START) {
1499             BADF("Start sequence not implemented\n");
1500         }
1501         break;
1502     case 0x01: /* SCNTL1 */
1503         s->scntl1 = val & ~LSI_SCNTL1_SST;
1504         if (val & LSI_SCNTL1_IARB) {
1505             BADF("Immediate Arbritration not implemented\n");
1506         }
1507         if (val & LSI_SCNTL1_RST) {
1508             s->sstat0 |= LSI_SSTAT0_RST;
1509             lsi_script_scsi_interrupt(s, LSI_SIST0_RST, 0);
1510         } else {
1511             s->sstat0 &= ~LSI_SSTAT0_RST;
1512         }
1513         break;
1514     case 0x02: /* SCNTL2 */
1515         val &= ~(LSI_SCNTL2_WSR | LSI_SCNTL2_WSS);
1516         s->scntl2 = val;
1517         break;
1518     case 0x03: /* SCNTL3 */
1519         s->scntl3 = val;
1520         break;
1521     case 0x04: /* SCID */
1522         s->scid = val;
1523         break;
1524     case 0x05: /* SXFER */
1525         s->sxfer = val;
1526         break;
1527     case 0x06: /* SDID */
1528         if ((val & 0xf) != (s->ssid & 0xf))
1529             BADF("Destination ID does not match SSID\n");
1530         s->sdid = val & 0xf;
1531         break;
1532     case 0x07: /* GPREG0 */
1533         break;
1534     case 0x08: /* SFBR */
1535         /* The CPU is not allowed to write to this register.  However the
1536            SCRIPTS register move instructions are.  */
1537         s->sfbr = val;
1538         break;
1539     case 0x0a: case 0x0b:
1540         /* Openserver writes to these readonly registers on startup */
1541         return;
1542     case 0x0c: case 0x0d: case 0x0e: case 0x0f:
1543         /* Linux writes to these readonly registers on startup.  */
1544         return;
1545     CASE_SET_REG32(dsa, 0x10)
1546     case 0x14: /* ISTAT0 */
1547         s->istat0 = (s->istat0 & 0x0f) | (val & 0xf0);
1548         if (val & LSI_ISTAT0_ABRT) {
1549             lsi_script_dma_interrupt(s, LSI_DSTAT_ABRT);
1550         }
1551         if (val & LSI_ISTAT0_INTF) {
1552             s->istat0 &= ~LSI_ISTAT0_INTF;
1553             lsi_update_irq(s);
1554         }
1555         if (s->waiting == 1 && val & LSI_ISTAT0_SIGP) {
1556             DPRINTF("Woken by SIGP\n");
1557             s->waiting = 0;
1558             s->dsp = s->dnad;
1559             lsi_execute_script(s);
1560         }
1561         if (val & LSI_ISTAT0_SRST) {
1562             lsi_soft_reset(s);
1563         }
1564         break;
1565     case 0x16: /* MBOX0 */
1566         s->mbox0 = val;
1567         break;
1568     case 0x17: /* MBOX1 */
1569         s->mbox1 = val;
1570         break;
1571     case 0x1a: /* CTEST2 */
1572         s->ctest2 = val & LSI_CTEST2_PCICIE;
1573         break;
1574     case 0x1b: /* CTEST3 */
1575         s->ctest3 = val & 0x0f;
1576         break;
1577     CASE_SET_REG32(temp, 0x1c)
1578     case 0x21: /* CTEST4 */
1579         if (val & 7) {
1580            BADF("Unimplemented CTEST4-FBL 0x%x\n", val);
1581         }
1582         s->ctest4 = val;
1583         break;
1584     case 0x22: /* CTEST5 */
1585         if (val & (LSI_CTEST5_ADCK | LSI_CTEST5_BBCK)) {
1586             BADF("CTEST5 DMA increment not implemented\n");
1587         }
1588         s->ctest5 = val;
1589         break;
1590     case 0x2c: /* DSP[0:7] */
1591         s->dsp &= 0xffffff00;
1592         s->dsp |= val;
1593         break;
1594     case 0x2d: /* DSP[8:15] */
1595         s->dsp &= 0xffff00ff;
1596         s->dsp |= val << 8;
1597         break;
1598     case 0x2e: /* DSP[16:23] */
1599         s->dsp &= 0xff00ffff;
1600         s->dsp |= val << 16;
1601         break;
1602     case 0x2f: /* DSP[24:31] */
1603         s->dsp &= 0x00ffffff;
1604         s->dsp |= val << 24;
1605         if ((s->dmode & LSI_DMODE_MAN) == 0
1606             && (s->istat1 & LSI_ISTAT1_SRUN) == 0)
1607             lsi_execute_script(s);
1608         break;
1609     CASE_SET_REG32(dsps, 0x30)
1610     CASE_SET_REG32(scratch[0], 0x34)
1611     case 0x38: /* DMODE */
1612         if (val & (LSI_DMODE_SIOM | LSI_DMODE_DIOM)) {
1613             BADF("IO mappings not implemented\n");
1614         }
1615         s->dmode = val;
1616         break;
1617     case 0x39: /* DIEN */
1618         s->dien = val;
1619         lsi_update_irq(s);
1620         break;
1621     case 0x3b: /* DCNTL */
1622         s->dcntl = val & ~(LSI_DCNTL_PFF | LSI_DCNTL_STD);
1623         if ((val & LSI_DCNTL_STD) && (s->istat1 & LSI_ISTAT1_SRUN) == 0)
1624             lsi_execute_script(s);
1625         break;
1626     case 0x40: /* SIEN0 */
1627         s->sien0 = val;
1628         lsi_update_irq(s);
1629         break;
1630     case 0x41: /* SIEN1 */
1631         s->sien1 = val;
1632         lsi_update_irq(s);
1633         break;
1634     case 0x47: /* GPCNTL0 */
1635         break;
1636     case 0x48: /* STIME0 */
1637         s->stime0 = val;
1638         break;
1639     case 0x49: /* STIME1 */
1640         if (val & 0xf) {
1641             DPRINTF("General purpose timer not implemented\n");
1642             /* ??? Raising the interrupt immediately seems to be sufficient
1643                to keep the FreeBSD driver happy.  */
1644             lsi_script_scsi_interrupt(s, 0, LSI_SIST1_GEN);
1645         }
1646         break;
1647     case 0x4a: /* RESPID0 */
1648         s->respid0 = val;
1649         break;
1650     case 0x4b: /* RESPID1 */
1651         s->respid1 = val;
1652         break;
1653     case 0x4d: /* STEST1 */
1654         s->stest1 = val;
1655         break;
1656     case 0x4e: /* STEST2 */
1657         if (val & 1) {
1658             BADF("Low level mode not implemented\n");
1659         }
1660         s->stest2 = val;
1661         break;
1662     case 0x4f: /* STEST3 */
1663         if (val & 0x41) {
1664             BADF("SCSI FIFO test mode not implemented\n");
1665         }
1666         s->stest3 = val;
1667         break;
1668     case 0x56: /* CCNTL0 */
1669         s->ccntl0 = val;
1670         break;
1671     case 0x57: /* CCNTL1 */
1672         s->ccntl1 = val;
1673         break;
1674     CASE_SET_REG32(mmrs, 0xa0)
1675     CASE_SET_REG32(mmws, 0xa4)
1676     CASE_SET_REG32(sfs, 0xa8)
1677     CASE_SET_REG32(drs, 0xac)
1678     CASE_SET_REG32(sbms, 0xb0)
1679     CASE_SET_REG32(dbms, 0xb4)
1680     CASE_SET_REG32(dnad64, 0xb8)
1681     CASE_SET_REG32(pmjad1, 0xc0)
1682     CASE_SET_REG32(pmjad2, 0xc4)
1683     CASE_SET_REG32(rbc, 0xc8)
1684     CASE_SET_REG32(ua, 0xcc)
1685     CASE_SET_REG32(ia, 0xd4)
1686     CASE_SET_REG32(sbc, 0xd8)
1687     CASE_SET_REG32(csbc, 0xdc)
1688     default:
1689         if (offset >= 0x5c && offset < 0xa0) {
1690             int n;
1691             int shift;
1692             n = (offset - 0x58) >> 2;
1693             shift = (offset & 3) * 8;
1694             s->scratch[n] &= ~(0xff << shift);
1695             s->scratch[n] |= (val & 0xff) << shift;
1696         } else {
1697             BADF("Unhandled writeb 0x%x = 0x%x\n", offset, val);
1698         }
1699     }
1700 #undef CASE_SET_REG32
1701 }
1702
1703 static void lsi_mmio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
1704 {
1705     LSIState *s = (LSIState *)opaque;
1706
1707     lsi_reg_writeb(s, addr & 0xff, val);
1708 }
1709
1710 static void lsi_mmio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
1711 {
1712     LSIState *s = (LSIState *)opaque;
1713
1714     addr &= 0xff;
1715     lsi_reg_writeb(s, addr, val & 0xff);
1716     lsi_reg_writeb(s, addr + 1, (val >> 8) & 0xff);
1717 }
1718
1719 static void lsi_mmio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
1720 {
1721     LSIState *s = (LSIState *)opaque;
1722
1723     addr &= 0xff;
1724     lsi_reg_writeb(s, addr, val & 0xff);
1725     lsi_reg_writeb(s, addr + 1, (val >> 8) & 0xff);
1726     lsi_reg_writeb(s, addr + 2, (val >> 16) & 0xff);
1727     lsi_reg_writeb(s, addr + 3, (val >> 24) & 0xff);
1728 }
1729
1730 static uint32_t lsi_mmio_readb(void *opaque, target_phys_addr_t addr)
1731 {
1732     LSIState *s = (LSIState *)opaque;
1733
1734     return lsi_reg_readb(s, addr & 0xff);
1735 }
1736
1737 static uint32_t lsi_mmio_readw(void *opaque, target_phys_addr_t addr)
1738 {
1739     LSIState *s = (LSIState *)opaque;
1740     uint32_t val;
1741
1742     addr &= 0xff;
1743     val = lsi_reg_readb(s, addr);
1744     val |= lsi_reg_readb(s, addr + 1) << 8;
1745     return val;
1746 }
1747
1748 static uint32_t lsi_mmio_readl(void *opaque, target_phys_addr_t addr)
1749 {
1750     LSIState *s = (LSIState *)opaque;
1751     uint32_t val;
1752     addr &= 0xff;
1753     val = lsi_reg_readb(s, addr);
1754     val |= lsi_reg_readb(s, addr + 1) << 8;
1755     val |= lsi_reg_readb(s, addr + 2) << 16;
1756     val |= lsi_reg_readb(s, addr + 3) << 24;
1757     return val;
1758 }
1759
1760 static CPUReadMemoryFunc *lsi_mmio_readfn[3] = {
1761     lsi_mmio_readb,
1762     lsi_mmio_readw,
1763     lsi_mmio_readl,
1764 };
1765
1766 static CPUWriteMemoryFunc *lsi_mmio_writefn[3] = {
1767     lsi_mmio_writeb,
1768     lsi_mmio_writew,
1769     lsi_mmio_writel,
1770 };
1771
1772 static void lsi_ram_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
1773 {
1774     LSIState *s = (LSIState *)opaque;
1775     uint32_t newval;
1776     int shift;
1777
1778     addr &= 0x1fff;
1779     newval = s->script_ram[addr >> 2];
1780     shift = (addr & 3) * 8;
1781     newval &= ~(0xff << shift);
1782     newval |= val << shift;
1783     s->script_ram[addr >> 2] = newval;
1784 }
1785
1786 static void lsi_ram_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
1787 {
1788     LSIState *s = (LSIState *)opaque;
1789     uint32_t newval;
1790
1791     addr &= 0x1fff;
1792     newval = s->script_ram[addr >> 2];
1793     if (addr & 2) {
1794         newval = (newval & 0xffff) | (val << 16);
1795     } else {
1796         newval = (newval & 0xffff0000) | val;
1797     }
1798     s->script_ram[addr >> 2] = newval;
1799 }
1800
1801
1802 static void lsi_ram_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
1803 {
1804     LSIState *s = (LSIState *)opaque;
1805
1806     addr &= 0x1fff;
1807     s->script_ram[addr >> 2] = val;
1808 }
1809
1810 static uint32_t lsi_ram_readb(void *opaque, target_phys_addr_t addr)
1811 {
1812     LSIState *s = (LSIState *)opaque;
1813     uint32_t val;
1814
1815     addr &= 0x1fff;
1816     val = s->script_ram[addr >> 2];
1817     val >>= (addr & 3) * 8;
1818     return val & 0xff;
1819 }
1820
1821 static uint32_t lsi_ram_readw(void *opaque, target_phys_addr_t addr)
1822 {
1823     LSIState *s = (LSIState *)opaque;
1824     uint32_t val;
1825
1826     addr &= 0x1fff;
1827     val = s->script_ram[addr >> 2];
1828     if (addr & 2)
1829         val >>= 16;
1830     return le16_to_cpu(val);
1831 }
1832
1833 static uint32_t lsi_ram_readl(void *opaque, target_phys_addr_t addr)
1834 {
1835     LSIState *s = (LSIState *)opaque;
1836
1837     addr &= 0x1fff;
1838     return le32_to_cpu(s->script_ram[addr >> 2]);
1839 }
1840
1841 static CPUReadMemoryFunc *lsi_ram_readfn[3] = {
1842     lsi_ram_readb,
1843     lsi_ram_readw,
1844     lsi_ram_readl,
1845 };
1846
1847 static CPUWriteMemoryFunc *lsi_ram_writefn[3] = {
1848     lsi_ram_writeb,
1849     lsi_ram_writew,
1850     lsi_ram_writel,
1851 };
1852
1853 static uint32_t lsi_io_readb(void *opaque, uint32_t addr)
1854 {
1855     LSIState *s = (LSIState *)opaque;
1856     return lsi_reg_readb(s, addr & 0xff);
1857 }
1858
1859 static uint32_t lsi_io_readw(void *opaque, uint32_t addr)
1860 {
1861     LSIState *s = (LSIState *)opaque;
1862     uint32_t val;
1863     addr &= 0xff;
1864     val = lsi_reg_readb(s, addr);
1865     val |= lsi_reg_readb(s, addr + 1) << 8;
1866     return val;
1867 }
1868
1869 static uint32_t lsi_io_readl(void *opaque, uint32_t addr)
1870 {
1871     LSIState *s = (LSIState *)opaque;
1872     uint32_t val;
1873     addr &= 0xff;
1874     val = lsi_reg_readb(s, addr);
1875     val |= lsi_reg_readb(s, addr + 1) << 8;
1876     val |= lsi_reg_readb(s, addr + 2) << 16;
1877     val |= lsi_reg_readb(s, addr + 3) << 24;
1878     return val;
1879 }
1880
1881 static void lsi_io_writeb(void *opaque, uint32_t addr, uint32_t val)
1882 {
1883     LSIState *s = (LSIState *)opaque;
1884     lsi_reg_writeb(s, addr & 0xff, val);
1885 }
1886
1887 static void lsi_io_writew(void *opaque, uint32_t addr, uint32_t val)
1888 {
1889     LSIState *s = (LSIState *)opaque;
1890     addr &= 0xff;
1891     lsi_reg_writeb(s, addr, val & 0xff);
1892     lsi_reg_writeb(s, addr + 1, (val >> 8) & 0xff);
1893 }
1894
1895 static void lsi_io_writel(void *opaque, uint32_t addr, uint32_t val)
1896 {
1897     LSIState *s = (LSIState *)opaque;
1898     addr &= 0xff;
1899     lsi_reg_writeb(s, addr, val & 0xff);
1900     lsi_reg_writeb(s, addr + 1, (val >> 8) & 0xff);
1901     lsi_reg_writeb(s, addr + 2, (val >> 16) & 0xff);
1902     lsi_reg_writeb(s, addr + 3, (val >> 24) & 0xff);
1903 }
1904
1905 static void lsi_io_mapfunc(PCIDevice *pci_dev, int region_num,
1906                            uint32_t addr, uint32_t size, int type)
1907 {
1908     LSIState *s = (LSIState *)pci_dev;
1909
1910     DPRINTF("Mapping IO at %08x\n", addr);
1911
1912     register_ioport_write(addr, 256, 1, lsi_io_writeb, s);
1913     register_ioport_read(addr, 256, 1, lsi_io_readb, s);
1914     register_ioport_write(addr, 256, 2, lsi_io_writew, s);
1915     register_ioport_read(addr, 256, 2, lsi_io_readw, s);
1916     register_ioport_write(addr, 256, 4, lsi_io_writel, s);
1917     register_ioport_read(addr, 256, 4, lsi_io_readl, s);
1918 }
1919
1920 static void lsi_ram_mapfunc(PCIDevice *pci_dev, int region_num,
1921                             uint32_t addr, uint32_t size, int type)
1922 {
1923     LSIState *s = (LSIState *)pci_dev;
1924
1925     DPRINTF("Mapping ram at %08x\n", addr);
1926     s->script_ram_base = addr;
1927     cpu_register_physical_memory(addr + 0, 0x2000, s->ram_io_addr);
1928 }
1929
1930 static void lsi_mmio_mapfunc(PCIDevice *pci_dev, int region_num,
1931                              uint32_t addr, uint32_t size, int type)
1932 {
1933     LSIState *s = (LSIState *)pci_dev;
1934
1935     DPRINTF("Mapping registers at %08x\n", addr);
1936     cpu_register_physical_memory(addr + 0, 0x400, s->mmio_io_addr);
1937 }
1938
1939 void lsi_scsi_attach(void *opaque, BlockDriverState *bd, int id)
1940 {
1941     LSIState *s = (LSIState *)opaque;
1942
1943     if (id < 0) {
1944         for (id = 0; id < LSI_MAX_DEVS; id++) {
1945             if (s->scsi_dev[id] == NULL)
1946                 break;
1947         }
1948     }
1949     if (id >= LSI_MAX_DEVS) {
1950         BADF("Bad Device ID %d\n", id);
1951         return;
1952     }
1953     if (s->scsi_dev[id]) {
1954         DPRINTF("Destroying device %d\n", id);
1955         s->scsi_dev[id]->destroy(s->scsi_dev[id]);
1956     }
1957     DPRINTF("Attaching block device %d\n", id);
1958     s->scsi_dev[id] = scsi_generic_init(bd, 1, lsi_command_complete, s);
1959     if (s->scsi_dev[id] == NULL)
1960         s->scsi_dev[id] = scsi_disk_init(bd, 1, lsi_command_complete, s);
1961     bd->devfn = s->pci_dev.devfn;
1962 }
1963
1964 static int lsi_scsi_uninit(PCIDevice *d)
1965 {
1966     LSIState *s = (LSIState *) d;
1967
1968     cpu_unregister_io_memory(s->mmio_io_addr);
1969     cpu_unregister_io_memory(s->ram_io_addr);
1970
1971     qemu_free(s->queue);
1972
1973     return 0;
1974 }
1975
1976 void *lsi_scsi_init(PCIBus *bus, int devfn)
1977 {
1978     LSIState *s;
1979
1980     s = (LSIState *)pci_register_device(bus, "LSI53C895A SCSI HBA",
1981                                         sizeof(*s), devfn, NULL, NULL);
1982     if (s == NULL) {
1983         fprintf(stderr, "lsi-scsi: Failed to register PCI device\n");
1984         return NULL;
1985     }
1986
1987     /* PCI Vendor ID (word) */
1988     s->pci_dev.config[0x00] = 0x00;
1989     s->pci_dev.config[0x01] = 0x10;
1990     /* PCI device ID (word) */
1991     s->pci_dev.config[0x02] = 0x12;
1992     s->pci_dev.config[0x03] = 0x00;
1993     /* PCI base class code */
1994     s->pci_dev.config[0x0b] = 0x01;
1995     /* PCI subsystem ID */
1996     s->pci_dev.config[0x2e] = 0x00;
1997     s->pci_dev.config[0x2f] = 0x10;
1998     /* PCI latency timer = 255 */
1999     s->pci_dev.config[0x0d] = 0xff;
2000     /* Interrupt pin 1 */
2001     s->pci_dev.config[0x3d] = 0x01;
2002
2003     s->mmio_io_addr = cpu_register_io_memory(0, lsi_mmio_readfn,
2004                                              lsi_mmio_writefn, s);
2005     s->ram_io_addr = cpu_register_io_memory(0, lsi_ram_readfn,
2006                                             lsi_ram_writefn, s);
2007
2008     pci_register_io_region((struct PCIDevice *)s, 0, 256,
2009                            PCI_ADDRESS_SPACE_IO, lsi_io_mapfunc);
2010     pci_register_io_region((struct PCIDevice *)s, 1, 0x400,
2011                            PCI_ADDRESS_SPACE_MEM, lsi_mmio_mapfunc);
2012     pci_register_io_region((struct PCIDevice *)s, 2, 0x2000,
2013                            PCI_ADDRESS_SPACE_MEM, lsi_ram_mapfunc);
2014     s->queue = qemu_malloc(sizeof(lsi_queue));
2015     s->queue_len = 1;
2016     s->active_commands = 0;
2017     s->pci_dev.unregister = lsi_scsi_uninit;
2018
2019     lsi_soft_reset(s);
2020
2021     return s;
2022 }