gdb/sparcl-tdep.c

   1 /* Target dependent code for the Fujitsu SPARClite for GDB, the GNU debugger.
   2    Copyright 1994, 1995, 1996, 1999, 2001  Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "gdbcore.h"
  23 #include "breakpoint.h"
  24 #include "target.h"
  25 #include "serial.h"
  26 #include "regcache.h"
  27 #include <sys/types.h>
  28
  29 #if (!defined(__GO32__) && !defined(_WIN32)) || defined(__CYGWIN32__)
  30 #define HAVE_SOCKETS
  31 #include <sys/time.h>
  32 #include <sys/socket.h>
  33 #include <netinet/in.h>
  34 #include <netdb.h>
  35 #endif
  36
  37 static struct target_ops sparclite_ops;
  38
  39 static char *remote_target_name = NULL;
  40 static serial_t remote_desc = NULL;
  41 static int serial_flag;
  42 #ifdef HAVE_SOCKETS
  43 static int udp_fd = -1;
  44 #endif
  45
  46 static serial_t open_tty (char *name);
  47 static int send_resp (serial_t desc, char c);
  48 static void close_tty (void * ignore);
  49 #ifdef HAVE_SOCKETS
  50 static int recv_udp_buf (int fd, unsigned char *buf, int len, int timeout);
  51 static int send_udp_buf (int fd, unsigned char *buf, int len);
  52 #endif
  53 static void sparclite_open (char *name, int from_tty);
  54 static void sparclite_close (int quitting);
  55 static void download (char *target_name, char *args, int from_tty,
  56                       void (*write_routine) (bfd * from_bfd,
  57                                              asection * from_sec,
  58                                              file_ptr from_addr,
  59                                              bfd_vma to_addr, int len),
  60                       void (*start_routine) (bfd_vma entry));
  61 static void sparclite_serial_start (bfd_vma entry);
  62 static void sparclite_serial_write (bfd * from_bfd, asection * from_sec,
  63                                     file_ptr from_addr,
  64                                     bfd_vma to_addr, int len);
  65 #ifdef HAVE_SOCKETS
  66 static unsigned short calc_checksum (unsigned char *buffer, int count);
  67 static void sparclite_udp_start (bfd_vma entry);
  68 static void sparclite_udp_write (bfd * from_bfd, asection * from_sec,
  69                                  file_ptr from_addr, bfd_vma to_addr,
  70                                  int len);
  71 #endif
  72 static void sparclite_download (char *filename, int from_tty);
  73
  74 #define DDA2_SUP_ASI            0xb000000
  75 #define DDA1_SUP_ASI            0xb0000
  76
  77 #define DDA2_ASI_MASK           0xff000000
  78 #define DDA1_ASI_MASK           0xff0000
  79 #define DIA2_SUP_MODE           0x8000
  80 #define DIA1_SUP_MODE           0x4000
  81 #define DDA2_ENABLE             0x100
  82 #define DDA1_ENABLE             0x80
  83 #define DIA2_ENABLE             0x40
  84 #define DIA1_ENABLE             0x20
  85 #define DSINGLE_STEP            0x10    /* not used */
  86 #define DDV_TYPE_MASK           0xc
  87 #define DDV_TYPE_LOAD           0x0
  88 #define DDV_TYPE_STORE          0x4
  89 #define DDV_TYPE_ACCESS         0x8
  90 #define DDV_TYPE_ALWAYS         0xc
  91 #define DDV_COND                0x2
  92 #define DDV_MASK                0x1
  93
  94 int
  95 sparclite_insert_watchpoint (CORE_ADDR addr, int len, int type)
  96 {
  97   CORE_ADDR dcr;
  98
  99   dcr = read_register (DCR_REGNUM);
 100
 101   if (!(dcr & DDA1_ENABLE))
 102     {
 103       write_register (DDA1_REGNUM, addr);
 104       dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK);
 105       dcr |= (DDA1_SUP_ASI | DDA1_ENABLE);
 106       if (type == 1)
 107         {
 108           write_register (DDV1_REGNUM, 0);
 109           write_register (DDV2_REGNUM, 0xffffffff);
 110           dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK));
 111         }
 112       else if (type == 0)
 113         {
 114           write_register (DDV1_REGNUM, 0);
 115           write_register (DDV2_REGNUM, 0xffffffff);
 116           dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK));
 117         }
 118       else
 119         {
 120           write_register (DDV1_REGNUM, 0);
 121           write_register (DDV2_REGNUM, 0xffffffff);
 122           dcr |= (DDV_TYPE_ACCESS);
 123         }
 124       write_register (DCR_REGNUM, dcr);
 125     }
 126   else if (!(dcr & DDA2_ENABLE))
 127     {
 128       write_register (DDA2_REGNUM, addr);
 129       dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK);
 130       dcr |= (DDA2_SUP_ASI | DDA2_ENABLE);
 131       if (type == 1)
 132         {
 133           write_register (DDV1_REGNUM, 0);
 134           write_register (DDV2_REGNUM, 0xffffffff);
 135           dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK);
 136         }
 137       else if (type == 0)
 138         {
 139           write_register (DDV1_REGNUM, 0);
 140           write_register (DDV2_REGNUM, 0xffffffff);
 141           dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK);
 142         }
 143       else
 144         {
 145           write_register (DDV1_REGNUM, 0);
 146           write_register (DDV2_REGNUM, 0xffffffff);
 147           dcr |= (DDV_TYPE_ACCESS);
 148         }
 149       write_register (DCR_REGNUM, dcr);
 150     }
 151   else
 152     return -1;
 153
 154   return 0;
 155 }
 156
 157 int
 158 sparclite_remove_watchpoint (CORE_ADDR addr, int len, int type)
 159 {
 160   CORE_ADDR dcr, dda1, dda2;
 161
 162   dcr = read_register (DCR_REGNUM);
 163   dda1 = read_register (DDA1_REGNUM);
 164   dda2 = read_register (DDA2_REGNUM);
 165
 166   if ((dcr & DDA1_ENABLE) && addr == dda1)
 167     write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE));
 168   else if ((dcr & DDA2_ENABLE) && addr == dda2)
 169     write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE));
 170   else
 171     return -1;
 172
 173   return 0;
 174 }
 175
 176 int
 177 sparclite_insert_hw_breakpoint (CORE_ADDR addr, int len)
 178 {
 179   CORE_ADDR dcr;
 180
 181   dcr = read_register (DCR_REGNUM);
 182
 183   if (!(dcr & DIA1_ENABLE))
 184     {
 185       write_register (DIA1_REGNUM, addr);
 186       write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE));
 187     }
 188   else if (!(dcr & DIA2_ENABLE))
 189     {
 190       write_register (DIA2_REGNUM, addr);
 191       write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE));
 192     }
 193   else
 194     return -1;
 195
 196   return 0;
 197 }
 198
 199 int
 200 sparclite_remove_hw_breakpoint (CORE_ADDR addr, int shadow)
 201 {
 202   CORE_ADDR dcr, dia1, dia2;
 203
 204   dcr = read_register (DCR_REGNUM);
 205   dia1 = read_register (DIA1_REGNUM);
 206   dia2 = read_register (DIA2_REGNUM);
 207
 208   if ((dcr & DIA1_ENABLE) && addr == dia1)
 209     write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE));
 210   else if ((dcr & DIA2_ENABLE) && addr == dia2)
 211     write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE));
 212   else
 213     return -1;
 214
 215   return 0;
 216 }
 217
 218 int
 219 sparclite_check_watch_resources (int type, int cnt, int ot)
 220 {
 221   /* Watchpoints not supported on simulator.  */
 222   if (strcmp (target_shortname, "sim") == 0)
 223     return 0;
 224
 225   if (type == bp_hardware_breakpoint)
 226     {
 227       if (TARGET_HW_BREAK_LIMIT == 0)
 228         return 0;
 229       else if (cnt <= TARGET_HW_BREAK_LIMIT)
 230         return 1;
 231     }
 232   else
 233     {
 234       if (TARGET_HW_WATCH_LIMIT == 0)
 235         return 0;
 236       else if (ot)
 237         return -1;
 238       else if (cnt <= TARGET_HW_WATCH_LIMIT)
 239         return 1;
 240     }
 241   return -1;
 242 }
 243
 244 CORE_ADDR
 245 sparclite_stopped_data_address (void)
 246 {
 247   CORE_ADDR dsr, dda1, dda2;
 248
 249   dsr = read_register (DSR_REGNUM);
 250   dda1 = read_register (DDA1_REGNUM);
 251   dda2 = read_register (DDA2_REGNUM);
 252
 253   if (dsr & 0x10)
 254     return dda1;
 255   else if (dsr & 0x20)
 256     return dda2;
 257   else
 258     return 0;
 259 }
 260 \f
 261 static serial_t
 262 open_tty (char *name)
 263 {
 264   serial_t desc;
 265
 266   desc = SERIAL_OPEN (name);
 267   if (!desc)
 268     perror_with_name (name);
 269
 270   if (baud_rate != -1)
 271     {
 272       if (SERIAL_SETBAUDRATE (desc, baud_rate))
 273         {
 274           SERIAL_CLOSE (desc);
 275           perror_with_name (name);
 276         }
 277     }
 278
 279   SERIAL_RAW (desc);
 280
 281   SERIAL_FLUSH_INPUT (desc);
 282
 283   return desc;
 284 }
 285
 286 /* Read a single character from the remote end, masking it down to 7 bits. */
 287
 288 static int
 289 readchar (serial_t desc, int timeout)
 290 {
 291   int ch;
 292   char s[10];
 293
 294   ch = SERIAL_READCHAR (desc, timeout);
 295
 296   switch (ch)
 297     {
 298     case SERIAL_EOF:
 299       error ("SPARClite remote connection closed");
 300     case SERIAL_ERROR:
 301       perror_with_name ("SPARClite communication error");
 302     case SERIAL_TIMEOUT:
 303       error ("SPARClite remote timeout");
 304     default:
 305       if (remote_debug > 0)
 306         {
 307           sprintf (s, "[%02x]", ch & 0xff);
 308           puts_debug ("read -->", s, "<--");
 309         }
 310       return ch;
 311     }
 312 }
 313
 314 static void
 315 debug_serial_write (serial_t desc, char *buf, int len)
 316 {
 317   char s[10];
 318
 319   SERIAL_WRITE (desc, buf, len);
 320   if (remote_debug > 0)
 321     {
 322       while (len-- > 0)
 323         {
 324           sprintf (s, "[%02x]", *buf & 0xff);
 325           puts_debug ("Sent -->", s, "<--");
 326           buf++;
 327         }
 328     }
 329 }
 330
 331
 332 static int
 333 send_resp (serial_t desc, char c)
 334 {
 335   debug_serial_write (desc, &c, 1);
 336   return readchar (desc, remote_timeout);
 337 }
 338
 339 static void
 340 close_tty (void *ignore)
 341 {
 342   if (!remote_desc)
 343     return;
 344
 345   SERIAL_CLOSE (remote_desc);
 346
 347   remote_desc = NULL;
 348 }
 349
 350 #ifdef HAVE_SOCKETS
 351 static int
 352 recv_udp_buf (int fd, unsigned char *buf, int len, int timeout)
 353 {
 354   int cc;
 355   fd_set readfds;
 356
 357   FD_ZERO (&readfds);
 358   FD_SET (fd, &readfds);
 359
 360   if (timeout >= 0)
 361     {
 362       struct timeval timebuf;
 363
 364       timebuf.tv_sec = timeout;
 365       timebuf.tv_usec = 0;
 366       cc = select (fd + 1, &readfds, 0, 0, &timebuf);
 367     }
 368   else
 369     cc = select (fd + 1, &readfds, 0, 0, 0);
 370
 371   if (cc == 0)
 372     return 0;
 373
 374   if (cc != 1)
 375     perror_with_name ("recv_udp_buf: Bad return value from select:");
 376
 377   cc = recv (fd, buf, len, 0);
 378
 379   if (cc < 0)
 380     perror_with_name ("Got an error from recv: ");
 381 }
 382
 383 static int
 384 send_udp_buf (int fd, unsigned char *buf, int len)
 385 {
 386   int cc;
 387
 388   cc = send (fd, buf, len, 0);
 389
 390   if (cc == len)
 391     return;
 392
 393   if (cc < 0)
 394     perror_with_name ("Got an error from send: ");
 395
 396   error ("Short count in send: tried %d, sent %d\n", len, cc);
 397 }
 398 #endif /* HAVE_SOCKETS */
 399
 400 static void
 401 sparclite_open (char *name, int from_tty)
 402 {
 403   struct cleanup *old_chain;
 404   int c;
 405   char *p;
 406
 407   if (!name)
 408     error ("You need to specify what device or hostname is associated with the SparcLite board.");
 409
 410   target_preopen (from_tty);
 411
 412   unpush_target (&sparclite_ops);
 413
 414   if (remote_target_name)
 415     xfree (remote_target_name);
 416
 417   remote_target_name = xstrdup (name);
 418
 419   /* We need a 'serial' or 'udp' keyword to disambiguate host:port, which can
 420      mean either a serial port on a terminal server, or the IP address of a
 421      SPARClite demo board.  If there's no colon, then it pretty much has to be
 422      a local device (except for DOS... grrmble) */
 423
 424   p = strchr (name, ' ');
 425
 426   if (p)
 427     {
 428       *p++ = '\000';
 429       while ((*p != '\000') && isspace (*p))
 430         p++;
 431
 432       if (strncmp (name, "serial", strlen (name)) == 0)
 433         serial_flag = 1;
 434       else if (strncmp (name, "udp", strlen (name)) == 0)
 435         serial_flag = 0;
 436       else
 437         error ("Must specify either `serial' or `udp'.");
 438     }
 439   else
 440     {
 441       p = name;
 442
 443       if (!strchr (name, ':'))
 444         serial_flag = 1;        /* No colon is unambiguous (local device) */
 445       else
 446         error ("Usage: target sparclite serial /dev/ttyb\n\
 447 or: target sparclite udp host");
 448     }
 449
 450   if (serial_flag)
 451     {
 452       remote_desc = open_tty (p);
 453
 454       old_chain = make_cleanup (close_tty, 0 /*ignore*/);
 455
 456       c = send_resp (remote_desc, 0x00);
 457
 458       if (c != 0xaa)
 459         error ("Unknown response (0x%x) from SparcLite.  Try resetting the board.",
 460                c);
 461
 462       c = send_resp (remote_desc, 0x55);
 463
 464       if (c != 0x55)
 465         error ("Sparclite appears to be ill.");
 466     }
 467   else
 468     {
 469 #ifdef HAVE_SOCKETS
 470       struct hostent *he;
 471       struct sockaddr_in sockaddr;
 472       unsigned char buffer[100];
 473       int cc;
 474
 475       /* Setup the socket.  Must be raw UDP. */
 476
 477       he = gethostbyname (p);
 478
 479       if (!he)
 480         error ("No such host %s.", p);
 481
 482       udp_fd = socket (PF_INET, SOCK_DGRAM, 0);
 483
 484       old_chain = make_cleanup (close, udp_fd);
 485
 486       sockaddr.sin_family = PF_INET;
 487       sockaddr.sin_port = htons (7000);
 488       memcpy (&sockaddr.sin_addr.s_addr, he->h_addr, sizeof (struct in_addr));
 489
 490       if (connect (udp_fd, &sockaddr, sizeof (sockaddr)))
 491         perror_with_name ("Connect failed");
 492
 493       buffer[0] = 0x5;
 494       buffer[1] = 0;
 495
 496       send_udp_buf (udp_fd, buffer, 2);         /* Request version */
 497       cc = recv_udp_buf (udp_fd, buffer, sizeof (buffer), 5);   /* Get response */
 498       if (cc == 0)
 499         error ("SPARClite isn't responding.");
 500
 501       if (cc < 3)
 502         error ("SPARClite appears to be ill.");
 503 #else
 504       error ("UDP downloading is not supported for DOS hosts.");
 505 #endif /* HAVE_SOCKETS */
 506     }
 507
 508   printf_unfiltered ("[SPARClite appears to be alive]\n");
 509
 510   push_target (&sparclite_ops);
 511
 512   discard_cleanups (old_chain);
 513
 514   return;
 515 }
 516
 517 static void
 518 sparclite_close (int quitting)
 519 {
 520   if (serial_flag)
 521     close_tty (0);
 522 #ifdef HAVE_SOCKETS
 523   else if (udp_fd != -1)
 524     close (udp_fd);
 525 #endif
 526 }
 527
 528 #define LOAD_ADDRESS 0x40000000
 529
 530 static void
 531 download (char *target_name, char *args, int from_tty,
 532           void (*write_routine) (bfd *from_bfd, asection *from_sec,
 533                                  file_ptr from_addr, bfd_vma to_addr, int len),
 534           void (*start_routine) (bfd_vma entry))
 535 {
 536   struct cleanup *old_chain;
 537   asection *section;
 538   bfd *pbfd;
 539   bfd_vma entry;
 540   int i;
 541 #define WRITESIZE 1024
 542   char *filename;
 543   int quiet;
 544   int nostart;
 545
 546   quiet = 0;
 547   nostart = 0;
 548   filename = NULL;
 549
 550   while (*args != '\000')
 551     {
 552       char *arg;
 553
 554       while (isspace (*args))
 555         args++;
 556
 557       arg = args;
 558
 559       while ((*args != '\000') && !isspace (*args))
 560         args++;
 561
 562       if (*args != '\000')
 563         *args++ = '\000';
 564
 565       if (*arg != '-')
 566         filename = arg;
 567       else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
 568         quiet = 1;
 569       else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
 570         nostart = 1;
 571       else
 572         error ("unknown option `%s'", arg);
 573     }
 574
 575   if (!filename)
 576     filename = get_exec_file (1);
 577
 578   pbfd = bfd_openr (filename, gnutarget);
 579   if (pbfd == NULL)
 580     {
 581       perror_with_name (filename);
 582       return;
 583     }
 584   old_chain = make_cleanup_bfd_close (pbfd);
 585
 586   if (!bfd_check_format (pbfd, bfd_object))
 587     error ("\"%s\" is not an object file: %s", filename,
 588            bfd_errmsg (bfd_get_error ()));
 589
 590   for (section = pbfd->sections; section; section = section->next)
 591     {
 592       if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
 593         {
 594           bfd_vma section_address;
 595           bfd_size_type section_size;
 596           file_ptr fptr;
 597           const char *section_name;
 598
 599           section_name = bfd_get_section_name (pbfd, section);
 600
 601           section_address = bfd_get_section_vma (pbfd, section);
 602
 603           /* Adjust sections from a.out files, since they don't
 604              carry their addresses with.  */
 605           if (bfd_get_flavour (pbfd) == bfd_target_aout_flavour)
 606             {
 607               if (strcmp (section_name, ".text") == 0)
 608                 section_address = bfd_get_start_address (pbfd);
 609               else if (strcmp (section_name, ".data") == 0)
 610                 {
 611                   /* Read the first 8 bytes of the data section.
 612                      There should be the string 'DaTa' followed by
 613                      a word containing the actual section address. */
 614                   struct data_marker
 615                     {
 616                       char signature[4];        /* 'DaTa' */
 617                       unsigned char sdata[4];   /* &sdata */
 618                     }
 619                   marker;
 620                   bfd_get_section_contents (pbfd, section, &marker, 0,
 621                                             sizeof (marker));
 622                   if (strncmp (marker.signature, "DaTa", 4) == 0)
 623                     {
 624                       if (TARGET_BYTE_ORDER == BIG_ENDIAN)
 625                         section_address = bfd_getb32 (marker.sdata);
 626                       else
 627                         section_address = bfd_getl32 (marker.sdata);
 628                     }
 629                 }
 630             }
 631
 632           section_size = bfd_get_section_size_before_reloc (section);
 633
 634           if (!quiet)
 635             printf_filtered ("[Loading section %s at 0x%x (%d bytes)]\n",
 636                              bfd_get_section_name (pbfd, section),
 637                              section_address,
 638                              section_size);
 639
 640           fptr = 0;
 641           while (section_size > 0)
 642             {
 643               int count;
 644               static char inds[] = "|/-\\";
 645               static int k = 0;
 646
 647               QUIT;
 648
 649               count = min (section_size, WRITESIZE);
 650
 651               write_routine (pbfd, section, fptr, section_address, count);
 652
 653               if (!quiet)
 654                 {
 655                   printf_unfiltered ("\r%c", inds[k++ % 4]);
 656                   gdb_flush (gdb_stdout);
 657                 }
 658
 659               section_address += count;
 660               fptr += count;
 661               section_size -= count;
 662             }
 663         }
 664     }
 665
 666   if (!nostart)
 667     {
 668       entry = bfd_get_start_address (pbfd);
 669
 670       if (!quiet)
 671         printf_unfiltered ("[Starting %s at 0x%x]\n", filename, entry);
 672
 673       start_routine (entry);
 674     }
 675
 676   do_cleanups (old_chain);
 677 }
 678
 679 static void
 680 sparclite_serial_start (bfd_vma entry)
 681 {
 682   char buffer[5];
 683   int i;
 684
 685   buffer[0] = 0x03;
 686   store_unsigned_integer (buffer + 1, 4, entry);
 687
 688   debug_serial_write (remote_desc, buffer, 1 + 4);
 689   i = readchar (remote_desc, remote_timeout);
 690   if (i != 0x55)
 691     error ("Can't start SparcLite.  Error code %d\n", i);
 692 }
 693
 694 static void
 695 sparclite_serial_write (bfd *from_bfd, asection *from_sec, file_ptr from_addr,
 696                         bfd_vma to_addr, int len)
 697 {
 698   char buffer[4 + 4 + WRITESIZE];       /* addr + len + data */
 699   unsigned char checksum;
 700   int i;
 701
 702   store_unsigned_integer (buffer, 4, to_addr);  /* Address */
 703   store_unsigned_integer (buffer + 4, 4, len);  /* Length */
 704
 705   bfd_get_section_contents (from_bfd, from_sec, buffer + 8, from_addr, len);
 706
 707   checksum = 0;
 708   for (i = 0; i < len; i++)
 709     checksum += buffer[8 + i];
 710
 711   i = send_resp (remote_desc, 0x01);
 712
 713   if (i != 0x5a)
 714     error ("Bad response from load command (0x%x)", i);
 715
 716   debug_serial_write (remote_desc, buffer, 4 + 4 + len);
 717   i = readchar (remote_desc, remote_timeout);
 718
 719   if (i != checksum)
 720     error ("Bad checksum from load command (0x%x)", i);
 721 }
 722
 723 #ifdef HAVE_SOCKETS
 724
 725 static unsigned short
 726 calc_checksum (unsigned char *buffer, int count)
 727 {
 728   unsigned short checksum;
 729
 730   checksum = 0;
 731   for (; count > 0; count -= 2, buffer += 2)
 732     checksum += (*buffer << 8) | *(buffer + 1);
 733
 734   if (count != 0)
 735     checksum += *buffer << 8;
 736
 737   return checksum;
 738 }
 739
 740 static void
 741 sparclite_udp_start (bfd_vma entry)
 742 {
 743   unsigned char buffer[6];
 744   int i;
 745
 746   buffer[0] = 0x3;
 747   buffer[1] = 0;
 748   buffer[2] = entry >> 24;
 749   buffer[3] = entry >> 16;
 750   buffer[4] = entry >> 8;
 751   buffer[5] = entry;
 752
 753   send_udp_buf (udp_fd, buffer, 6);     /* Send start addr */
 754   i = recv_udp_buf (udp_fd, buffer, sizeof (buffer), -1);       /* Get response */
 755
 756   if (i < 1 || buffer[0] != 0x55)
 757     error ("Failed to take start address.");
 758 }
 759
 760 static void
 761 sparclite_udp_write (bfd *from_bfd, asection *from_sec, file_ptr from_addr,
 762                      bfd_vma to_addr, int len)
 763 {
 764   unsigned char buffer[2000];
 765   unsigned short checksum;
 766   static int pkt_num = 0;
 767   static unsigned long old_addr = -1;
 768   int i;
 769
 770   while (1)
 771     {
 772       if (to_addr != old_addr)
 773         {
 774           buffer[0] = 0x1;      /* Load command */
 775           buffer[1] = 0x1;      /* Loading address */
 776           buffer[2] = to_addr >> 24;
 777           buffer[3] = to_addr >> 16;
 778           buffer[4] = to_addr >> 8;
 779           buffer[5] = to_addr;
 780
 781           checksum = 0;
 782           for (i = 0; i < 6; i++)
 783             checksum += buffer[i];
 784           checksum &= 0xff;
 785
 786           send_udp_buf (udp_fd, buffer, 6);
 787           i = recv_udp_buf (udp_fd, buffer, sizeof buffer, -1);
 788
 789           if (i < 1)
 790             error ("Got back short checksum for load addr.");
 791
 792           if (checksum != buffer[0])
 793             error ("Got back bad checksum for load addr.");
 794
 795           pkt_num = 0;          /* Load addr resets packet seq # */
 796           old_addr = to_addr;
 797         }
 798
 799       bfd_get_section_contents (from_bfd, from_sec, buffer + 6, from_addr,
 800                                 len);
 801
 802       checksum = calc_checksum (buffer + 6, len);
 803
 804       buffer[0] = 0x1;          /* Load command */
 805       buffer[1] = 0x2;          /* Loading data */
 806       buffer[2] = pkt_num >> 8;
 807       buffer[3] = pkt_num;
 808       buffer[4] = checksum >> 8;
 809       buffer[5] = checksum;
 810
 811       send_udp_buf (udp_fd, buffer, len + 6);
 812       i = recv_udp_buf (udp_fd, buffer, sizeof buffer, 3);
 813
 814       if (i == 0)
 815         {
 816           fprintf_unfiltered (gdb_stderr, "send_data: timeout sending %d bytes to address 0x%x retrying\n", len, to_addr);
 817           continue;
 818         }
 819
 820       if (buffer[0] != 0xff)
 821         error ("Got back bad response for load data.");
 822
 823       old_addr += len;
 824       pkt_num++;
 825
 826       return;
 827     }
 828 }
 829
 830 #endif /* HAVE_SOCKETS */
 831
 832 static void
 833 sparclite_download (char *filename, int from_tty)
 834 {
 835   if (!serial_flag)
 836 #ifdef HAVE_SOCKETS
 837     download (remote_target_name, filename, from_tty, sparclite_udp_write,
 838               sparclite_udp_start);
 839 #else
 840     internal_error (__FILE__, __LINE__, "failed internal consistency check");                   /* sparclite_open should prevent this! */
 841 #endif
 842   else
 843     download (remote_target_name, filename, from_tty, sparclite_serial_write,
 844               sparclite_serial_start);
 845 }
 846 \f
 847 /* Set up the sparclite target vector.  */
 848
 849 static void
 850 init_sparclite_ops (void)
 851 {
 852   sparclite_ops.to_shortname = "sparclite";
 853   sparclite_ops.to_longname = "SPARClite download target";
 854   sparclite_ops.to_doc = "Download to a remote SPARClite target board via serial of UDP.\n\
 855 Specify the device it is connected to (e.g. /dev/ttya).";
 856   sparclite_ops.to_open = sparclite_open;
 857   sparclite_ops.to_close = sparclite_close;
 858   sparclite_ops.to_load = sparclite_download;
 859   sparclite_ops.to_stratum = download_stratum;
 860   sparclite_ops.to_magic = OPS_MAGIC;
 861 }
 862
 863 void
 864 _initialize_sparcl_tdep (void)
 865 {
 866   init_sparclite_ops ();
 867   add_target (&sparclite_ops);
 868 }