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import gdb-1999-08-30 snapshot
[deliverable/binutils-gdb.git] / gdb / sparcl-tdep.c
CommitLineData
c906108c 1/* Target dependent code for the Fujitsu SPARClite for GDB, the GNU debugger.
43e526b9 2 Copyright 1994, 1995, 1996, 1999 Free Software Foundation, Inc.
c906108c 3
c5aa993b 4 This file is part of GDB.
c906108c 5
c5aa993b
JM		 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.
c906108c 10
c5aa993b
JM		 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.
c906108c 15
c5aa993b
JM		 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. */
c906108c
SS		 20
21#include "defs.h"
22#include "gdbcore.h"
23#include "breakpoint.h"
24#include "target.h"
25#include "serial.h"
26#include <sys/types.h>
27
28#if (!defined(__GO32__) && !defined(_WIN32)) || defined(__CYGWIN32__)
29#define HAVE_SOCKETS
30#include <sys/time.h>
c906108c
SS		 31#include <sys/socket.h>
32#include <netinet/in.h>
33#include <netdb.h>
34#endif
35
43e526b9 36static struct target_ops sparclite_ops;
c906108c
SS		 37
38static char *remote_target_name = NULL;
39static serial_t remote_desc = NULL;
40static int serial_flag;
41#ifdef HAVE_SOCKETS
42static int udp_fd = -1;
43#endif
44
45static serial_t open_tty PARAMS ((char *name));
46static int send_resp PARAMS ((serial_t desc, char c));
47static void close_tty PARAMS ((int ignore));
48#ifdef HAVE_SOCKETS
49static int recv_udp_buf PARAMS ((int fd, unsigned char *buf, int len, int timeout));
50static int send_udp_buf PARAMS ((int fd, unsigned char *buf, int len));
51#endif
52static void sparclite_open PARAMS ((char *name, int from_tty));
53static void sparclite_close PARAMS ((int quitting));
54static void download PARAMS ((char *target_name, char *args, int from_tty,
c5aa993b
JM		 55 void (*write_routine) (bfd * from_bfd,
56 asection * from_sec,
c906108c 57 file_ptr from_addr,
c5aa993b 58 bfd_vma to_addr, int len),
c906108c
SS		 59 void (*start_routine) (bfd_vma entry)));
60static void sparclite_serial_start PARAMS ((bfd_vma entry));
c5aa993b 61static void sparclite_serial_write PARAMS ((bfd * from_bfd, asection * from_sec,
c906108c
SS		 62 file_ptr from_addr,
63 bfd_vma to_addr, int len));
64#ifdef HAVE_SOCKETS
65static unsigned short calc_checksum PARAMS ((unsigned char *buffer,
66 int count));
67static void sparclite_udp_start PARAMS ((bfd_vma entry));
c5aa993b 68static void sparclite_udp_write PARAMS ((bfd * from_bfd, asection * from_sec,
c906108c
SS		 69 file_ptr from_addr, bfd_vma to_addr,
70 int len));
71#endif
72static void sparclite_download PARAMS ((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
c5aa993b 78#define DDA1_ASI_MASK 0xff0000
c906108c
SS		 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
c5aa993b 85#define DSINGLE_STEP 0x10 /* not used */
c906108c
SS		 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
94int
95sparclite_insert_watchpoint (addr, len, type)
96 CORE_ADDR addr;
97 int len;
98 int type;
99{
100 CORE_ADDR dcr;
101
102 dcr = read_register (DCR_REGNUM);
103
104 if (!(dcr & DDA1_ENABLE))
105 {
106 write_register (DDA1_REGNUM, addr);
107 dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK);
108 dcr |= (DDA1_SUP_ASI | DDA1_ENABLE);
109 if (type == 1)
110 {
111 write_register (DDV1_REGNUM, 0);
112 write_register (DDV2_REGNUM, 0xffffffff);
113 dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK));
c5aa993b 114 }
c906108c
SS		 115 else if (type == 0)
116 {
117 write_register (DDV1_REGNUM, 0);
118 write_register (DDV2_REGNUM, 0xffffffff);
119 dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK));
120 }
121 else
122 {
123 write_register (DDV1_REGNUM, 0);
124 write_register (DDV2_REGNUM, 0xffffffff);
125 dcr |= (DDV_TYPE_ACCESS);
126 }
127 write_register (DCR_REGNUM, dcr);
128 }
129 else if (!(dcr & DDA2_ENABLE))
130 {
131 write_register (DDA2_REGNUM, addr);
132 dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK);
133 dcr |= (DDA2_SUP_ASI | DDA2_ENABLE);
134 if (type == 1)
135 {
136 write_register (DDV1_REGNUM, 0);
137 write_register (DDV2_REGNUM, 0xffffffff);
138 dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK);
139 }
140 else if (type == 0)
141 {
142 write_register (DDV1_REGNUM, 0);
143 write_register (DDV2_REGNUM, 0xffffffff);
144 dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK);
145 }
146 else
147 {
148 write_register (DDV1_REGNUM, 0);
149 write_register (DDV2_REGNUM, 0xffffffff);
150 dcr |= (DDV_TYPE_ACCESS);
151 }
152 write_register (DCR_REGNUM, dcr);
153 }
154 else
155 return -1;
156
157 return 0;
c5aa993b 158}
c906108c
SS		 159
160int
161sparclite_remove_watchpoint (addr, len, type)
162 CORE_ADDR addr;
163 int len;
164 int type;
165{
166 CORE_ADDR dcr, dda1, dda2;
167
168 dcr = read_register (DCR_REGNUM);
169 dda1 = read_register (DDA1_REGNUM);
170 dda2 = read_register (DDA2_REGNUM);
171
172 if ((dcr & DDA1_ENABLE) && addr == dda1)
173 write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE));
174 else if ((dcr & DDA2_ENABLE) && addr == dda2)
175 write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE));
176 else
177 return -1;
178
179 return 0;
180}
181
182int
183sparclite_insert_hw_breakpoint (addr, len)
184 CORE_ADDR addr;
185 int len;
186{
187 CORE_ADDR dcr;
188
189 dcr = read_register (DCR_REGNUM);
c5aa993b 190
c906108c
SS		 191 if (!(dcr & DIA1_ENABLE))
192 {
193 write_register (DIA1_REGNUM, addr);
194 write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE));
195 }
196 else if (!(dcr & DIA2_ENABLE))
197 {
198 write_register (DIA2_REGNUM, addr);
199 write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE));
200 }
201 else
202 return -1;
203
204 return 0;
205}
206
207int
208sparclite_remove_hw_breakpoint (addr, shadow)
209 CORE_ADDR addr;
210 int shadow;
211{
212 CORE_ADDR dcr, dia1, dia2;
213
214 dcr = read_register (DCR_REGNUM);
215 dia1 = read_register (DIA1_REGNUM);
216 dia2 = read_register (DIA2_REGNUM);
c5aa993b 217
c906108c
SS		 218 if ((dcr & DIA1_ENABLE) && addr == dia1)
219 write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE));
220 else if ((dcr & DIA2_ENABLE) && addr == dia2)
221 write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE));
222 else
223 return -1;
224
225 return 0;
226}
227
228int
229sparclite_check_watch_resources (type, cnt, ot)
230 int type;
231 int cnt;
232 int ot;
233{
234 /* Watchpoints not supported on simulator. */
235 if (strcmp (target_shortname, "sim") == 0)
236 return 0;
237
238 if (type == bp_hardware_breakpoint)
239 {
240 if (TARGET_HW_BREAK_LIMIT == 0)
241 return 0;
242 else if (cnt <= TARGET_HW_BREAK_LIMIT)
243 return 1;
244 }
245 else
246 {
247 if (TARGET_HW_WATCH_LIMIT == 0)
248 return 0;
249 else if (ot)
250 return -1;
251 else if (cnt <= TARGET_HW_WATCH_LIMIT)
252 return 1;
253 }
254 return -1;
255}
256
257CORE_ADDR
258sparclite_stopped_data_address ()
259{
260 CORE_ADDR dsr, dda1, dda2;
261
262 dsr = read_register (DSR_REGNUM);
263 dda1 = read_register (DDA1_REGNUM);
264 dda2 = read_register (DDA2_REGNUM);
265
266 if (dsr & 0x10)
267 return dda1;
268 else if (dsr & 0x20)
269 return dda2;
270 else
271 return 0;
272}
273\f
274static serial_t
275open_tty (name)
276 char *name;
277{
278 serial_t desc;
279
280 desc = SERIAL_OPEN (name);
281 if (!desc)
282 perror_with_name (name);
283
284 if (baud_rate != -1)
285 {
286 if (SERIAL_SETBAUDRATE (desc, baud_rate))
287 {
288 SERIAL_CLOSE (desc);
289 perror_with_name (name);
290 }
291 }
292
293 SERIAL_RAW (desc);
294
295 SERIAL_FLUSH_INPUT (desc);
296
297 return desc;
298}
299
300/* Read a single character from the remote end, masking it down to 7 bits. */
301
302static int
303readchar (desc, timeout)
304 serial_t desc;
305 int timeout;
306{
307 int ch;
308 char s[10];
309
310 ch = SERIAL_READCHAR (desc, timeout);
311
312 switch (ch)
313 {
314 case SERIAL_EOF:
315 error ("SPARClite remote connection closed");
316 case SERIAL_ERROR:
317 perror_with_name ("SPARClite communication error");
318 case SERIAL_TIMEOUT:
319 error ("SPARClite remote timeout");
320 default:
321 if (remote_debug > 0)
322 {
323 sprintf (s, "[%02x]", ch & 0xff);
324 puts_debug ("read -->", s, "<--");
325 }
326 return ch;
327 }
328}
329
330static void
331debug_serial_write (desc, buf, len)
332 serial_t desc;
333 char *buf;
334 int len;
335{
336 char s[10];
337
338 SERIAL_WRITE (desc, buf, len);
339 if (remote_debug > 0)
340 {
341 while (len-- > 0)
342 {
343 sprintf (s, "[%02x]", *buf & 0xff);
344 puts_debug ("Sent -->", s, "<--");
345 buf++;
346 }
347 }
348}
349
350
351static int
352send_resp (desc, c)
353 serial_t desc;
354 char c;
355{
356 debug_serial_write (desc, &c, 1);
357 return readchar (desc, remote_timeout);
358}
359
360static void
361close_tty (ignore)
362 int ignore;
363{
364 if (!remote_desc)
365 return;
366
367 SERIAL_CLOSE (remote_desc);
368
369 remote_desc = NULL;
370}
371
372#ifdef HAVE_SOCKETS
373static int
374recv_udp_buf (fd, buf, len, timeout)
375 int fd, len;
376 unsigned char *buf;
377 int timeout;
378{
379 int cc;
380 fd_set readfds;
381
382 FD_ZERO (&readfds);
383 FD_SET (fd, &readfds);
384
385 if (timeout >= 0)
386 {
387 struct timeval timebuf;
388
389 timebuf.tv_sec = timeout;
390 timebuf.tv_usec = 0;
391 cc = select (fd + 1, &readfds, 0, 0, &timebuf);
392 }
393 else
394 cc = select (fd + 1, &readfds, 0, 0, 0);
395
396 if (cc == 0)
397 return 0;
398
399 if (cc != 1)
400 perror_with_name ("recv_udp_buf: Bad return value from select:");
401
402 cc = recv (fd, buf, len, 0);
403
404 if (cc < 0)
405 perror_with_name ("Got an error from recv: ");
406}
407
408static int
409send_udp_buf (fd, buf, len)
410 int fd, len;
411 unsigned char *buf;
412{
413 int cc;
414
415 cc = send (fd, buf, len, 0);
416
417 if (cc == len)
418 return;
419
420 if (cc < 0)
421 perror_with_name ("Got an error from send: ");
422
423 error ("Short count in send: tried %d, sent %d\n", len, cc);
424}
425#endif /* HAVE_SOCKETS */
426
427static void
428sparclite_open (name, from_tty)
429 char *name;
430 int from_tty;
431{
432 struct cleanup *old_chain;
433 int c;
434 char *p;
435
436 if (!name)
437 error ("You need to specify what device or hostname is associated with the SparcLite board.");
438
439 target_preopen (from_tty);
440
441 unpush_target (&sparclite_ops);
442
443 if (remote_target_name)
444 free (remote_target_name);
445
446 remote_target_name = strsave (name);
447
448 /* We need a 'serial' or 'udp' keyword to disambiguate host:port, which can
449 mean either a serial port on a terminal server, or the IP address of a
450 SPARClite demo board. If there's no colon, then it pretty much has to be
451 a local device (except for DOS... grrmble) */
452
453 p = strchr (name, ' ');
454
455 if (p)
456 {
457 *p++ = '\000';
c5aa993b
JM		 458 while ((*p != '\000') && isspace (*p))
459 p++;
c906108c
SS		 460
461 if (strncmp (name, "serial", strlen (name)) == 0)
462 serial_flag = 1;
463 else if (strncmp (name, "udp", strlen (name)) == 0)
464 serial_flag = 0;
465 else
466 error ("Must specify either `serial' or `udp'.");
467 }
468 else
469 {
470 p = name;
471
472 if (!strchr (name, ':'))
473 serial_flag = 1; /* No colon is unambiguous (local device) */
474 else
475 error ("Usage: target sparclite serial /dev/ttyb\n\
476or: target sparclite udp host");
477 }
478
479 if (serial_flag)
480 {
481 remote_desc = open_tty (p);
482
483 old_chain = make_cleanup ((make_cleanup_func) close_tty, 0);
484
485 c = send_resp (remote_desc, 0x00);
486
487 if (c != 0xaa)
488 error ("Unknown response (0x%x) from SparcLite. Try resetting the board.",
489 c);
490
491 c = send_resp (remote_desc, 0x55);
492
493 if (c != 0x55)
494 error ("Sparclite appears to be ill.");
495 }
496 else
497 {
498#ifdef HAVE_SOCKETS
499 struct hostent *he;
500 struct sockaddr_in sockaddr;
501 unsigned char buffer[100];
502 int cc;
503
504 /* Setup the socket. Must be raw UDP. */
505
506 he = gethostbyname (p);
507
508 if (!he)
509 error ("No such host %s.", p);
510
511 udp_fd = socket (PF_INET, SOCK_DGRAM, 0);
512
513 old_chain = make_cleanup (close, udp_fd);
514
515 sockaddr.sin_family = PF_INET;
c5aa993b 516 sockaddr.sin_port = htons (7000);
c906108c
SS		 517 memcpy (&sockaddr.sin_addr.s_addr, he->h_addr, sizeof (struct in_addr));
518
c5aa993b 519 if (connect (udp_fd, &sockaddr, sizeof (sockaddr)))
c906108c
SS		 520 perror_with_name ("Connect failed");
521
522 buffer[0] = 0x5;
523 buffer[1] = 0;
524
c5aa993b
JM		 525 send_udp_buf (udp_fd, buffer, 2); /* Request version */
526 cc = recv_udp_buf (udp_fd, buffer, sizeof (buffer), 5); /* Get response */
c906108c
SS		 527 if (cc == 0)
528 error ("SPARClite isn't responding.");
529
530 if (cc < 3)
531 error ("SPARClite appears to be ill.");
532#else
533 error ("UDP downloading is not supported for DOS hosts.");
534#endif /* HAVE_SOCKETS */
535 }
536
537 printf_unfiltered ("[SPARClite appears to be alive]\n");
538
539 push_target (&sparclite_ops);
540
541 discard_cleanups (old_chain);
542
543 return;
544}
545
546static void
547sparclite_close (quitting)
548 int quitting;
549{
550 if (serial_flag)
551 close_tty (0);
552#ifdef HAVE_SOCKETS
c5aa993b
JM		 553 else if (udp_fd != -1)
554 close (udp_fd);
c906108c
SS		 555#endif
556}
557
558#define LOAD_ADDRESS 0x40000000
559
560static void
561download (target_name, args, from_tty, write_routine, start_routine)
562 char *target_name;
563 char *args;
564 int from_tty;
c5aa993b
JM		 565 void (*write_routine) PARAMS ((bfd * from_bfd, asection * from_sec,
566 file_ptr from_addr, bfd_vma to_addr, int len));
c906108c
SS		 567 void (*start_routine) PARAMS ((bfd_vma entry));
568{
569 struct cleanup *old_chain;
570 asection *section;
571 bfd *pbfd;
572 bfd_vma entry;
573 int i;
574#define WRITESIZE 1024
575 char *filename;
576 int quiet;
577 int nostart;
578
579 quiet = 0;
580 nostart = 0;
581 filename = NULL;
582
583 while (*args != '\000')
584 {
585 char *arg;
586
c5aa993b
JM		 587 while (isspace (*args))
588 args++;
c906108c
SS		 589
590 arg = args;
591
c5aa993b
JM		 592 while ((*args != '\000') && !isspace (*args))
593 args++;
c906108c
SS		 594
595 if (*args != '\000')
596 *args++ = '\000';
597
598 if (*arg != '-')
599 filename = arg;
600 else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
601 quiet = 1;
602 else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
603 nostart = 1;
604 else
605 error ("unknown option `%s'", arg);
606 }
607
608 if (!filename)
609 filename = get_exec_file (1);
610
611 pbfd = bfd_openr (filename, gnutarget);
612 if (pbfd == NULL)
613 {
614 perror_with_name (filename);
615 return;
616 }
617 old_chain = make_cleanup ((make_cleanup_func) bfd_close, pbfd);
618
c5aa993b 619 if (!bfd_check_format (pbfd, bfd_object))
c906108c
SS		 620 error ("\"%s\" is not an object file: %s", filename,
621 bfd_errmsg (bfd_get_error ()));
622
c5aa993b 623 for (section = pbfd->sections; section; section = section->next)
c906108c
SS		 624 {
625 if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
626 {
c5aa993b 627 bfd_vma section_address;
c906108c 628 bfd_size_type section_size;
c5aa993b
JM		 629 file_ptr fptr;
630 const char *section_name;
c906108c 631
c5aa993b 632 section_name = bfd_get_section_name (pbfd, section);
c906108c
SS		 633
634 section_address = bfd_get_section_vma (pbfd, section);
635
636 /* Adjust sections from a.out files, since they don't
637 carry their addresses with. */
638 if (bfd_get_flavour (pbfd) == bfd_target_aout_flavour)
639 {
640 if (strcmp (section_name, ".text") == 0)
641 section_address = bfd_get_start_address (pbfd);
642 else if (strcmp (section_name, ".data") == 0)
643 {
644 /* Read the first 8 bytes of the data section.
645 There should be the string 'DaTa' followed by
646 a word containing the actual section address. */
647 struct data_marker
c5aa993b
JM		 648 {
649 char signature[4]; /* 'DaTa' */
650 unsigned char sdata[4]; /* &sdata */
651 }
652 marker;
c906108c
SS		 653 bfd_get_section_contents (pbfd, section, &marker, 0,
654 sizeof (marker));
655 if (strncmp (marker.signature, "DaTa", 4) == 0)
656 {
657 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
658 section_address = bfd_getb32 (marker.sdata);
659 else
660 section_address = bfd_getl32 (marker.sdata);
661 }
662 }
663 }
664
665 section_size = bfd_get_section_size_before_reloc (section);
666
667 if (!quiet)
668 printf_filtered ("[Loading section %s at 0x%x (%d bytes)]\n",
669 bfd_get_section_name (pbfd, section),
670 section_address,
671 section_size);
672
673 fptr = 0;
674 while (section_size > 0)
675 {
676 int count;
677 static char inds[] = "|/-\\";
678 static int k = 0;
679
680 QUIT;
681
682 count = min (section_size, WRITESIZE);
683
684 write_routine (pbfd, section, fptr, section_address, count);
685
686 if (!quiet)
687 {
688 printf_unfiltered ("\r%c", inds[k++ % 4]);
689 gdb_flush (gdb_stdout);
690 }
691
692 section_address += count;
693 fptr += count;
694 section_size -= count;
695 }
696 }
697 }
698
699 if (!nostart)
700 {
701 entry = bfd_get_start_address (pbfd);
702
703 if (!quiet)
704 printf_unfiltered ("[Starting %s at 0x%x]\n", filename, entry);
705
706 start_routine (entry);
707 }
708
709 do_cleanups (old_chain);
710}
711
712static void
713sparclite_serial_start (entry)
714 bfd_vma entry;
715{
716 char buffer[5];
717 int i;
718
719 buffer[0] = 0x03;
720 store_unsigned_integer (buffer + 1, 4, entry);
721
722 debug_serial_write (remote_desc, buffer, 1 + 4);
723 i = readchar (remote_desc, remote_timeout);
724 if (i != 0x55)
725 error ("Can't start SparcLite. Error code %d\n", i);
726}
727
728static void
729sparclite_serial_write (from_bfd, from_sec, from_addr, to_addr, len)
730 bfd *from_bfd;
731 asection *from_sec;
732 file_ptr from_addr;
733 bfd_vma to_addr;
734 int len;
735{
c5aa993b 736 char buffer[4 + 4 + WRITESIZE]; /* addr + len + data */
c906108c
SS		 737 unsigned char checksum;
738 int i;
739
c5aa993b
JM		 740 store_unsigned_integer (buffer, 4, to_addr); /* Address */
741 store_unsigned_integer (buffer + 4, 4, len); /* Length */
c906108c
SS		 742
743 bfd_get_section_contents (from_bfd, from_sec, buffer + 8, from_addr, len);
744
745 checksum = 0;
746 for (i = 0; i < len; i++)
747 checksum += buffer[8 + i];
748
749 i = send_resp (remote_desc, 0x01);
750
751 if (i != 0x5a)
752 error ("Bad response from load command (0x%x)", i);
753
754 debug_serial_write (remote_desc, buffer, 4 + 4 + len);
755 i = readchar (remote_desc, remote_timeout);
756
757 if (i != checksum)
758 error ("Bad checksum from load command (0x%x)", i);
759}
760
761#ifdef HAVE_SOCKETS
762
763static unsigned short
764calc_checksum (buffer, count)
765 unsigned char *buffer;
766 int count;
767{
768 unsigned short checksum;
769
770 checksum = 0;
771 for (; count > 0; count -= 2, buffer += 2)
772 checksum += (*buffer << 8) | *(buffer + 1);
773
774 if (count != 0)
775 checksum += *buffer << 8;
776
777 return checksum;
778}
779
780static void
781sparclite_udp_start (entry)
782 bfd_vma entry;
783{
784 unsigned char buffer[6];
785 int i;
786
787 buffer[0] = 0x3;
788 buffer[1] = 0;
789 buffer[2] = entry >> 24;
790 buffer[3] = entry >> 16;
791 buffer[4] = entry >> 8;
792 buffer[5] = entry;
793
c5aa993b
JM		 794 send_udp_buf (udp_fd, buffer, 6); /* Send start addr */
795 i = recv_udp_buf (udp_fd, buffer, sizeof (buffer), -1); /* Get response */
c906108c
SS		 796
797 if (i < 1 || buffer[0] != 0x55)
798 error ("Failed to take start address.");
799}
800
801static void
802sparclite_udp_write (from_bfd, from_sec, from_addr, to_addr, len)
803 bfd *from_bfd;
804 asection *from_sec;
805 file_ptr from_addr;
806 bfd_vma to_addr;
807 int len;
808{
809 unsigned char buffer[2000];
810 unsigned short checksum;
811 static int pkt_num = 0;
812 static unsigned long old_addr = -1;
813 int i;
814
815 while (1)
816 {
817 if (to_addr != old_addr)
818 {
819 buffer[0] = 0x1; /* Load command */
820 buffer[1] = 0x1; /* Loading address */
821 buffer[2] = to_addr >> 24;
822 buffer[3] = to_addr >> 16;
823 buffer[4] = to_addr >> 8;
824 buffer[5] = to_addr;
825
826 checksum = 0;
827 for (i = 0; i < 6; i++)
828 checksum += buffer[i];
829 checksum &= 0xff;
830
831 send_udp_buf (udp_fd, buffer, 6);
832 i = recv_udp_buf (udp_fd, buffer, sizeof buffer, -1);
833
834 if (i < 1)
835 error ("Got back short checksum for load addr.");
836
837 if (checksum != buffer[0])
838 error ("Got back bad checksum for load addr.");
839
840 pkt_num = 0; /* Load addr resets packet seq # */
841 old_addr = to_addr;
842 }
843
844 bfd_get_section_contents (from_bfd, from_sec, buffer + 6, from_addr,
845 len);
846
847 checksum = calc_checksum (buffer + 6, len);
848
849 buffer[0] = 0x1; /* Load command */
850 buffer[1] = 0x2; /* Loading data */
851 buffer[2] = pkt_num >> 8;
852 buffer[3] = pkt_num;
853 buffer[4] = checksum >> 8;
854 buffer[5] = checksum;
855
856 send_udp_buf (udp_fd, buffer, len + 6);
857 i = recv_udp_buf (udp_fd, buffer, sizeof buffer, 3);
858
859 if (i == 0)
860 {
861 fprintf_unfiltered (gdb_stderr, "send_data: timeout sending %d bytes to address 0x%x retrying\n", len, to_addr);
862 continue;
863 }
864
865 if (buffer[0] != 0xff)
866 error ("Got back bad response for load data.");
867
868 old_addr += len;
869 pkt_num++;
870
871 return;
872 }
873}
874
875#endif /* HAVE_SOCKETS */
876
877static void
878sparclite_download (filename, from_tty)
879 char *filename;
880 int from_tty;
881{
882 if (!serial_flag)
883#ifdef HAVE_SOCKETS
884 download (remote_target_name, filename, from_tty, sparclite_udp_write,
885 sparclite_udp_start);
886#else
887 abort (); /* sparclite_open should prevent this! */
888#endif
889 else
890 download (remote_target_name, filename, from_tty, sparclite_serial_write,
891 sparclite_serial_start);
892}
893\f
43e526b9 894/* Set up the sparclite target vector. */
c906108c 895
c5aa993b
JM		 896static void
897init_sparclite_ops (void)
c906108c 898{
c5aa993b 899 sparclite_ops.to_shortname = "sparclite";
43e526b9
JM		 900 sparclite_ops.to_longname = "SPARClite download target";
901 sparclite_ops.to_doc = "Download to a remote SPARClite target board via serial of UDP.\n\
902Specify the device it is connected to (e.g. /dev/ttya).";
c5aa993b
JM		 903 sparclite_ops.to_open = sparclite_open;
904 sparclite_ops.to_close = sparclite_close;
c5aa993b 905 sparclite_ops.to_load = sparclite_download;
c5aa993b 906 sparclite_ops.to_stratum = download_stratum;
c5aa993b 907 sparclite_ops.to_magic = OPS_MAGIC;
43e526b9 908}
c906108c
SS		 909
910void
911_initialize_sparcl_tdep ()
912{
c5aa993b 913 init_sparclite_ops ();
c906108c
SS		 914 add_target (&sparclite_ops);
915}
GDB Binutils - Deliverables
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