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[thirdparty/binutils-gdb.git] / gdb / sparcl-tdep.c
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0e887539 1/* Target dependent code for the Fujitsu SPARClite for GDB, the GNU debugger.
2f4973f8 2 Copyright 1994, 1995, 1996 Free Software Foundation, Inc.
b955f680
KH
3
4This file is part of GDB.
5
6This program is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2 of the License, or
9(at your option) any later version.
10
11This program is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with this program; if not, write to the Free Software
6c9638b4 18Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
b955f680
KH
19
20#include "defs.h"
21#include "gdbcore.h"
22#include "breakpoint.h"
0e887539
SG
23#include "target.h"
24#include "serial.h"
25#include <sys/types.h>
45993f61 26
9cc267de 27#if (!defined(__GO32__) && !defined(_WIN32)) || defined(__CYGWIN32__)
45993f61 28#define HAVE_SOCKETS
9e77e83d 29#include <sys/time.h>
4887063b 30#include <unistd.h>
0e887539
SG
31#include <sys/socket.h>
32#include <netinet/in.h>
33#include <netdb.h>
a76ef70a 34#endif
0e887539
SG
35
36extern struct target_ops sparclite_ops; /* Forward decl */
37extern struct target_ops remote_ops;
38
39static char *remote_target_name = NULL;
40static serial_t remote_desc = NULL;
0e887539 41static int serial_flag;
45993f61 42#ifdef HAVE_SOCKETS
a76ef70a
SG
43static int udp_fd = -1;
44#endif
0e887539
SG
45
46static serial_t open_tty PARAMS ((char *name));
47static int send_resp PARAMS ((serial_t desc, char c));
48static void close_tty PARAMS ((int ignore));
45993f61 49#ifdef HAVE_SOCKETS
0e887539
SG
50static int recv_udp_buf PARAMS ((int fd, unsigned char *buf, int len, int timeout));
51static int send_udp_buf PARAMS ((int fd, unsigned char *buf, int len));
a76ef70a 52#endif
0e887539
SG
53static void sparclite_open PARAMS ((char *name, int from_tty));
54static void sparclite_close PARAMS ((int quitting));
55static void download PARAMS ((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)));
61static void sparclite_serial_start PARAMS ((bfd_vma entry));
62static void sparclite_serial_write PARAMS ((bfd *from_bfd, asection *from_sec,
63 file_ptr from_addr,
64 bfd_vma to_addr, int len));
45993f61 65#ifdef HAVE_SOCKETS
0e887539
SG
66static unsigned short calc_checksum PARAMS ((unsigned char *buffer,
67 int count));
68static void sparclite_udp_start PARAMS ((bfd_vma entry));
69static void sparclite_udp_write PARAMS ((bfd *from_bfd, asection *from_sec,
70 file_ptr from_addr, bfd_vma to_addr,
71 int len));
a76ef70a 72#endif
0e887539 73static void sparclite_download PARAMS ((char *filename, int from_tty));
b955f680
KH
74
75#define DDA2_SUP_ASI 0xb000000
76#define DDA1_SUP_ASI 0xb0000
77
78#define DDA2_ASI_MASK 0xff000000
79#define DDA1_ASI_MASK 0xff0000
80#define DIA2_SUP_MODE 0x8000
81#define DIA1_SUP_MODE 0x4000
82#define DDA2_ENABLE 0x100
83#define DDA1_ENABLE 0x80
84#define DIA2_ENABLE 0x40
85#define DIA1_ENABLE 0x20
ce8f5b49 86#define DSINGLE_STEP 0x10 /* not used */
b955f680
KH
87#define DDV_TYPE_MASK 0xc
88#define DDV_TYPE_LOAD 0x0
89#define DDV_TYPE_STORE 0x4
90#define DDV_TYPE_ACCESS 0x8
91#define DDV_TYPE_ALWAYS 0xc
92#define DDV_COND 0x2
93#define DDV_MASK 0x1
94
95int
c746aa85
SG
96sparclite_insert_watchpoint (addr, len, type)
97 CORE_ADDR addr;
98 int len;
99 int type;
b955f680 100{
c746aa85 101 CORE_ADDR dcr;
b955f680
KH
102
103 dcr = read_register (DCR_REGNUM);
104
105 if (!(dcr & DDA1_ENABLE))
b955f680 106 {
c746aa85
SG
107 write_register (DDA1_REGNUM, addr);
108 dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK);
109 dcr |= (DDA1_SUP_ASI | DDA1_ENABLE);
110 if (type == 1)
111 {
112 write_register (DDV1_REGNUM, 0);
113 write_register (DDV2_REGNUM, 0xffffffff);
114 dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK));
115 }
116 else if (type == 0)
117 {
118 write_register (DDV1_REGNUM, 0);
119 write_register (DDV2_REGNUM, 0xffffffff);
120 dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK));
121 }
122 else
123 {
124 write_register (DDV1_REGNUM, 0);
125 write_register (DDV2_REGNUM, 0xffffffff);
126 dcr |= (DDV_TYPE_ACCESS);
127 }
128 write_register (DCR_REGNUM, dcr);
b955f680 129 }
b955f680 130 else if (!(dcr & DDA2_ENABLE))
b955f680 131 {
c746aa85
SG
132 write_register (DDA2_REGNUM, addr);
133 dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK);
134 dcr |= (DDA2_SUP_ASI | DDA2_ENABLE);
135 if (type == 1)
136 {
137 write_register (DDV1_REGNUM, 0);
138 write_register (DDV2_REGNUM, 0xffffffff);
139 dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK);
140 }
141 else if (type == 0)
142 {
143 write_register (DDV1_REGNUM, 0);
144 write_register (DDV2_REGNUM, 0xffffffff);
145 dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK);
146 }
147 else
148 {
149 write_register (DDV1_REGNUM, 0);
150 write_register (DDV2_REGNUM, 0xffffffff);
151 dcr |= (DDV_TYPE_ACCESS);
152 }
153 write_register (DCR_REGNUM, dcr);
b955f680 154 }
b955f680
KH
155 else
156 return -1;
157
158 return 0;
159}
160
161int
c746aa85
SG
162sparclite_remove_watchpoint (addr, len, type)
163 CORE_ADDR addr;
164 int len;
165 int type;
b955f680 166{
c746aa85 167 CORE_ADDR dcr, dda1, dda2;
b955f680
KH
168
169 dcr = read_register (DCR_REGNUM);
170 dda1 = read_register (DDA1_REGNUM);
171 dda2 = read_register (DDA2_REGNUM);
172
c746aa85 173 if ((dcr & DDA1_ENABLE) && addr == dda1)
b955f680 174 write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE));
c746aa85 175 else if ((dcr & DDA2_ENABLE) && addr == dda2)
b955f680 176 write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE));
b955f680
KH
177 else
178 return -1;
179
180 return 0;
181}
182
183int
c746aa85
SG
184sparclite_insert_hw_breakpoint (addr, len)
185 CORE_ADDR addr;
186 int len;
b955f680 187{
c746aa85 188 CORE_ADDR dcr;
b955f680
KH
189
190 dcr = read_register (DCR_REGNUM);
191
c746aa85
SG
192 if (!(dcr & DIA1_ENABLE))
193 {
194 write_register (DIA1_REGNUM, addr);
195 write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE));
196 }
197 else if (!(dcr & DIA2_ENABLE))
198 {
199 write_register (DIA2_REGNUM, addr);
200 write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE));
201 }
b955f680
KH
202 else
203 return -1;
204
205 return 0;
206}
207
208int
c746aa85
SG
209sparclite_remove_hw_breakpoint (addr, shadow)
210 CORE_ADDR addr;
211 int shadow;
b955f680 212{
c746aa85 213 CORE_ADDR dcr, dia1, dia2;
b955f680
KH
214
215 dcr = read_register (DCR_REGNUM);
216 dia1 = read_register (DIA1_REGNUM);
217 dia2 = read_register (DIA2_REGNUM);
218
c746aa85 219 if ((dcr & DIA1_ENABLE) && addr == dia1)
b955f680 220 write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE));
c746aa85 221 else if ((dcr & DIA2_ENABLE) && addr == dia2)
b955f680 222 write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE));
b955f680
KH
223 else
224 return -1;
c746aa85 225
b955f680
KH
226 return 0;
227}
228
229int
c746aa85
SG
230sparclite_check_watch_resources (type, cnt, ot)
231 int type;
232 int cnt;
233 int ot;
b955f680 234{
ce8f5b49
MA
235 /* Watchpoints not supported on simulator. */
236 if (strcmp (target_shortname, "sim") == 0)
237 return 0;
238
c746aa85 239 if (type == bp_hardware_breakpoint)
0fe1522a
SG
240 {
241 if (TARGET_HW_BREAK_LIMIT == 0)
242 return 0;
243 else if (cnt <= TARGET_HW_BREAK_LIMIT)
244 return 1;
245 }
c746aa85 246 else
0fe1522a
SG
247 {
248 if (TARGET_HW_WATCH_LIMIT == 0)
249 return 0;
250 else if (ot)
251 return -1;
252 else if (cnt <= TARGET_HW_WATCH_LIMIT)
253 return 1;
254 }
b955f680
KH
255 return -1;
256}
257
258CORE_ADDR
c746aa85 259sparclite_stopped_data_address ()
b955f680
KH
260{
261 CORE_ADDR dsr, dda1, dda2;
262
263 dsr = read_register (DSR_REGNUM);
264 dda1 = read_register (DDA1_REGNUM);
265 dda2 = read_register (DDA2_REGNUM);
266
c746aa85
SG
267 if (dsr & 0x10)
268 return dda1;
269 else if (dsr & 0x20)
270 return dda2;
271 else
272 return 0;
b955f680 273}
0e887539
SG
274\f
275static serial_t
276open_tty (name)
277 char *name;
278{
279 serial_t desc;
280
281 desc = SERIAL_OPEN (name);
282 if (!desc)
283 perror_with_name (name);
284
285 if (baud_rate != -1)
286 {
287 if (SERIAL_SETBAUDRATE (desc, baud_rate))
288 {
289 SERIAL_CLOSE (desc);
290 perror_with_name (name);
291 }
292 }
293
294 SERIAL_RAW (desc);
295
296 SERIAL_FLUSH_INPUT (desc);
297
298 return desc;
299}
300
934ec87c
SG
301/* Read a single character from the remote end, masking it down to 7 bits. */
302
0e887539 303static int
934ec87c 304readchar (desc, timeout)
0e887539 305 serial_t desc;
934ec87c 306 int timeout;
0e887539 307{
934ec87c 308 int ch;
e50f526e 309 char s[10];
0e887539 310
934ec87c 311 ch = SERIAL_READCHAR (desc, timeout);
0e887539 312
934ec87c 313 switch (ch)
0e887539 314 {
934ec87c
SG
315 case SERIAL_EOF:
316 error ("SPARClite remote connection closed");
0e887539 317 case SERIAL_ERROR:
934ec87c 318 perror_with_name ("SPARClite communication error");
0e887539 319 case SERIAL_TIMEOUT:
934ec87c
SG
320 error ("SPARClite remote timeout");
321 default:
e50f526e
MA
322 if (remote_debug > 0)
323 {
324 sprintf (s, "[%02x]", ch & 0xff);
325 puts_debug ("read -->", s, "<--");
326 }
934ec87c 327 return ch;
0e887539
SG
328 }
329}
330
e50f526e
MA
331static void
332debug_serial_write (desc, buf, len)
333 serial_t desc;
334 char *buf;
335 int len;
336{
337 char s[10];
338
339 SERIAL_WRITE (desc, buf, len);
340 if (remote_debug > 0)
341 {
342 while (len-- > 0)
343 {
344 sprintf (s, "[%02x]", *buf & 0xff);
345 puts_debug ("Sent -->", s, "<--");
346 buf++;
347 }
348 }
349}
350
351
934ec87c
SG
352static int
353send_resp (desc, c)
354 serial_t desc;
355 char c;
356{
e50f526e 357 debug_serial_write (desc, &c, 1);
c0351c0f 358 return readchar (desc, remote_timeout);
934ec87c
SG
359}
360
0e887539
SG
361static void
362close_tty (ignore)
363 int ignore;
364{
365 if (!remote_desc)
366 return;
367
368 SERIAL_CLOSE (remote_desc);
369
370 remote_desc = NULL;
371}
372
45993f61 373#ifdef HAVE_SOCKETS
0e887539
SG
374static int
375recv_udp_buf (fd, buf, len, timeout)
376 int fd, len;
377 unsigned char *buf;
378 int timeout;
379{
380 int cc;
381 fd_set readfds;
382
383 FD_ZERO (&readfds);
384 FD_SET (fd, &readfds);
385
386 if (timeout >= 0)
387 {
388 struct timeval timebuf;
389
390 timebuf.tv_sec = timeout;
391 timebuf.tv_usec = 0;
392 cc = select (fd + 1, &readfds, 0, 0, &timebuf);
393 }
394 else
395 cc = select (fd + 1, &readfds, 0, 0, 0);
396
397 if (cc == 0)
398 return 0;
399
400 if (cc != 1)
401 perror_with_name ("recv_udp_buf: Bad return value from select:");
402
403 cc = recv (fd, buf, len, 0);
404
405 if (cc < 0)
406 perror_with_name ("Got an error from recv: ");
407}
408
409static int
410send_udp_buf (fd, buf, len)
411 int fd, len;
412 unsigned char *buf;
413{
414 int cc;
415
416 cc = send (fd, buf, len, 0);
417
418 if (cc == len)
419 return;
420
421 if (cc < 0)
422 perror_with_name ("Got an error from send: ");
423
424 error ("Short count in send: tried %d, sent %d\n", len, cc);
425}
d6acae68 426#endif /* HAVE_SOCKETS */
0e887539
SG
427
428static void
429sparclite_open (name, from_tty)
430 char *name;
431 int from_tty;
432{
433 struct cleanup *old_chain;
434 int c;
435 char *p;
436
437 if (!name)
438 error ("You need to specify what device or hostname is associated with the SparcLite board.");
439
440 target_preopen (from_tty);
441
442 unpush_target (&sparclite_ops);
443
444 if (remote_target_name)
445 free (remote_target_name);
446
447 remote_target_name = strsave (name);
448
449 /* We need a 'serial' or 'udp' keyword to disambiguate host:port, which can
450 mean either a serial port on a terminal server, or the IP address of a
451 SPARClite demo board. If there's no colon, then it pretty much has to be
452 a local device (except for DOS... grrmble) */
453
454 p = strchr (name, ' ');
455
456 if (p)
457 {
458 *p++ = '\000';
459 while ((*p != '\000') && isspace (*p)) p++;
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
c8623080 483 old_chain = make_cleanup ((make_cleanup_func) close_tty, 0);
0e887539
SG
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 {
45993f61 498#ifdef HAVE_SOCKETS
0e887539
SG
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;
516 sockaddr.sin_port = htons(7000);
517 memcpy (&sockaddr.sin_addr.s_addr, he->h_addr, sizeof (struct in_addr));
518
519 if (connect (udp_fd, &sockaddr, sizeof(sockaddr)))
520 perror_with_name ("Connect failed");
521
522 buffer[0] = 0x5;
523 buffer[1] = 0;
524
525 send_udp_buf (udp_fd, buffer, 2); /* Request version */
526 cc = recv_udp_buf (udp_fd, buffer, sizeof(buffer), 5); /* Get response */
527 if (cc == 0)
528 error ("SPARClite isn't responding.");
529
530 if (cc < 3)
531 error ("SPARClite appears to be ill.");
a76ef70a
SG
532#else
533 error ("UDP downloading is not supported for DOS hosts.");
d6acae68 534#endif /* HAVE_SOCKETS */
0e887539
SG
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);
45993f61 552#ifdef HAVE_SOCKETS
0e887539
SG
553 else
554 if (udp_fd != -1)
555 close (udp_fd);
a76ef70a 556#endif
0e887539
SG
557}
558
559#define LOAD_ADDRESS 0x40000000
560
561static void
562download (target_name, args, from_tty, write_routine, start_routine)
563 char *target_name;
564 char *args;
565 int from_tty;
8501c742
SG
566 void (*write_routine) PARAMS ((bfd *from_bfd, asection *from_sec,
567 file_ptr from_addr, bfd_vma to_addr, int len));
568 void (*start_routine) PARAMS ((bfd_vma entry));
0e887539
SG
569{
570 struct cleanup *old_chain;
571 asection *section;
572 bfd *pbfd;
573 bfd_vma entry;
574 int i;
575#define WRITESIZE 1024
576 char *filename;
577 int quiet;
578 int nostart;
579
580 quiet = 0;
581 nostart = 0;
582 filename = NULL;
583
584 while (*args != '\000')
585 {
586 char *arg;
587
588 while (isspace (*args)) args++;
589
590 arg = args;
591
592 while ((*args != '\000') && !isspace (*args)) args++;
593
594 if (*args != '\000')
595 *args++ = '\000';
596
597 if (*arg != '-')
598 filename = arg;
599 else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
600 quiet = 1;
601 else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
602 nostart = 1;
603 else
604 error ("unknown option `%s'", arg);
605 }
606
607 if (!filename)
608 filename = get_exec_file (1);
609
610 pbfd = bfd_openr (filename, gnutarget);
611 if (pbfd == NULL)
612 {
613 perror_with_name (filename);
614 return;
615 }
c8623080 616 old_chain = make_cleanup ((make_cleanup_func) bfd_close, pbfd);
0e887539
SG
617
618 if (!bfd_check_format (pbfd, bfd_object))
619 error ("\"%s\" is not an object file: %s", filename,
620 bfd_errmsg (bfd_get_error ()));
621
622 for (section = pbfd->sections; section; section = section->next)
623 {
624 if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
625 {
c0351c0f 626 bfd_vma section_address;
0e887539 627 bfd_size_type section_size;
c0351c0f
MA
628 file_ptr fptr;
629 const char *section_name;
630
631 section_name = bfd_get_section_name(pbfd, section);
0e887539
SG
632
633 section_address = bfd_get_section_vma (pbfd, section);
c0351c0f 634
0e887539
SG
635 /* Adjust sections from a.out files, since they don't
636 carry their addresses with. */
637 if (bfd_get_flavour (pbfd) == bfd_target_aout_flavour)
c0351c0f
MA
638 {
639 if (strcmp (section_name, ".text") == 0)
640 section_address = bfd_get_start_address (pbfd);
641 else if (strcmp (section_name, ".data") == 0)
642 {
643 /* Read the first 8 bytes of the data section.
644 There should be the string 'DaTa' followed by
645 a word containing the actual section address. */
646 struct data_marker
647 {
648 char signature[4]; /* 'DaTa' */
649 unsigned char sdata[4]; /* &sdata */
650 } marker;
651 bfd_get_section_contents (pbfd, section, &marker, 0,
652 sizeof (marker));
653 if (strncmp (marker.signature, "DaTa", 4) == 0)
654 {
655 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
656 section_address = bfd_getb32 (marker.sdata);
657 else
658 section_address = bfd_getl32 (marker.sdata);
659 }
660 }
661 }
0e887539
SG
662
663 section_size = bfd_get_section_size_before_reloc (section);
664
665 if (!quiet)
666 printf_filtered ("[Loading section %s at 0x%x (%d bytes)]\n",
667 bfd_get_section_name (pbfd, section),
668 section_address,
669 section_size);
670
671 fptr = 0;
672 while (section_size > 0)
673 {
674 int count;
675 static char inds[] = "|/-\\";
676 static int k = 0;
677
678 QUIT;
679
680 count = min (section_size, WRITESIZE);
681
682 write_routine (pbfd, section, fptr, section_address, count);
683
684 if (!quiet)
685 {
686 printf_unfiltered ("\r%c", inds[k++ % 4]);
687 gdb_flush (gdb_stdout);
688 }
689
690 section_address += count;
691 fptr += count;
692 section_size -= count;
693 }
694 }
695 }
696
697 if (!nostart)
698 {
699 entry = bfd_get_start_address (pbfd);
700
701 if (!quiet)
702 printf_unfiltered ("[Starting %s at 0x%x]\n", filename, entry);
703
704 start_routine (entry);
705 }
706
707 do_cleanups (old_chain);
708}
709
710static void
711sparclite_serial_start (entry)
712 bfd_vma entry;
713{
714 char buffer[5];
715 int i;
716
717 buffer[0] = 0x03;
718 store_unsigned_integer (buffer + 1, 4, entry);
719
e50f526e 720 debug_serial_write (remote_desc, buffer, 1 + 4);
c0351c0f 721 i = readchar (remote_desc, remote_timeout);
0e887539
SG
722 if (i != 0x55)
723 error ("Can't start SparcLite. Error code %d\n", i);
724}
725
726static void
727sparclite_serial_write (from_bfd, from_sec, from_addr, to_addr, len)
728 bfd *from_bfd;
729 asection *from_sec;
730 file_ptr from_addr;
731 bfd_vma to_addr;
732 int len;
733{
734 char buffer[4 + 4 + WRITESIZE]; /* addr + len + data */
735 unsigned char checksum;
736 int i;
737
738 store_unsigned_integer (buffer, 4, to_addr); /* Address */
739 store_unsigned_integer (buffer + 4, 4, len); /* Length */
740
741 bfd_get_section_contents (from_bfd, from_sec, buffer + 8, from_addr, len);
742
743 checksum = 0;
744 for (i = 0; i < len; i++)
745 checksum += buffer[8 + i];
746
747 i = send_resp (remote_desc, 0x01);
748
749 if (i != 0x5a)
750 error ("Bad response from load command (0x%x)", i);
751
e50f526e 752 debug_serial_write (remote_desc, buffer, 4 + 4 + len);
c0351c0f 753 i = readchar (remote_desc, remote_timeout);
0e887539
SG
754
755 if (i != checksum)
756 error ("Bad checksum from load command (0x%x)", i);
757}
758
45993f61 759#ifdef HAVE_SOCKETS
a76ef70a 760
0e887539
SG
761static unsigned short
762calc_checksum (buffer, count)
763 unsigned char *buffer;
764 int count;
765{
766 unsigned short checksum;
767
768 checksum = 0;
769 for (; count > 0; count -= 2, buffer += 2)
770 checksum += (*buffer << 8) | *(buffer + 1);
771
772 if (count != 0)
773 checksum += *buffer << 8;
774
775 return checksum;
776}
777
778static void
779sparclite_udp_start (entry)
780 bfd_vma entry;
781{
782 unsigned char buffer[6];
783 int i;
784
785 buffer[0] = 0x3;
786 buffer[1] = 0;
787 buffer[2] = entry >> 24;
788 buffer[3] = entry >> 16;
789 buffer[4] = entry >> 8;
790 buffer[5] = entry;
791
792 send_udp_buf (udp_fd, buffer, 6); /* Send start addr */
793 i = recv_udp_buf (udp_fd, buffer, sizeof(buffer), -1); /* Get response */
794
795 if (i < 1 || buffer[0] != 0x55)
796 error ("Failed to take start address.");
797}
798
799static void
800sparclite_udp_write (from_bfd, from_sec, from_addr, to_addr, len)
801 bfd *from_bfd;
802 asection *from_sec;
803 file_ptr from_addr;
804 bfd_vma to_addr;
805 int len;
806{
807 unsigned char buffer[2000];
808 unsigned short checksum;
809 static int pkt_num = 0;
810 static unsigned long old_addr = -1;
811 int i;
812
813 while (1)
814 {
815 if (to_addr != old_addr)
816 {
817 buffer[0] = 0x1; /* Load command */
818 buffer[1] = 0x1; /* Loading address */
819 buffer[2] = to_addr >> 24;
820 buffer[3] = to_addr >> 16;
821 buffer[4] = to_addr >> 8;
822 buffer[5] = to_addr;
823
824 checksum = 0;
825 for (i = 0; i < 6; i++)
826 checksum += buffer[i];
827 checksum &= 0xff;
828
829 send_udp_buf (udp_fd, buffer, 6);
830 i = recv_udp_buf (udp_fd, buffer, sizeof buffer, -1);
831
832 if (i < 1)
833 error ("Got back short checksum for load addr.");
834
835 if (checksum != buffer[0])
836 error ("Got back bad checksum for load addr.");
837
838 pkt_num = 0; /* Load addr resets packet seq # */
839 old_addr = to_addr;
840 }
841
842 bfd_get_section_contents (from_bfd, from_sec, buffer + 6, from_addr,
843 len);
844
845 checksum = calc_checksum (buffer + 6, len);
846
847 buffer[0] = 0x1; /* Load command */
848 buffer[1] = 0x2; /* Loading data */
849 buffer[2] = pkt_num >> 8;
850 buffer[3] = pkt_num;
851 buffer[4] = checksum >> 8;
852 buffer[5] = checksum;
853
854 send_udp_buf (udp_fd, buffer, len + 6);
855 i = recv_udp_buf (udp_fd, buffer, sizeof buffer, 3);
856
857 if (i == 0)
858 {
859 fprintf_unfiltered (gdb_stderr, "send_data: timeout sending %d bytes to address 0x%x retrying\n", len, to_addr);
860 continue;
861 }
862
863 if (buffer[0] != 0xff)
864 error ("Got back bad response for load data.");
865
866 old_addr += len;
867 pkt_num++;
868
869 return;
870 }
871}
872
d6acae68 873#endif /* HAVE_SOCKETS */
a76ef70a 874
0e887539
SG
875static void
876sparclite_download (filename, from_tty)
877 char *filename;
878 int from_tty;
879{
880 if (!serial_flag)
45993f61 881#ifdef HAVE_SOCKETS
0e887539
SG
882 download (remote_target_name, filename, from_tty, sparclite_udp_write,
883 sparclite_udp_start);
a76ef70a
SG
884#else
885 abort (); /* sparclite_open should prevent this! */
886#endif
0e887539
SG
887 else
888 download (remote_target_name, filename, from_tty, sparclite_serial_write,
889 sparclite_serial_start);
890}
891\f
892/* Define the target subroutine names */
893
c719b714
JM
894static struct target_ops sparclite_ops ;
895
ba4d67c2
FN
896static void
897init_sparclite_ops(void)
0e887539 898{
c719b714
JM
899 sparclite_ops.to_shortname = "sparclite";
900 sparclite_ops.to_longname = "SPARClite remote target";
901 sparclite_ops.to_doc = "Use a remote SPARClite target board via a serial line; using a gdb-specific protocol.\n\
902Specify the serial device it is connected to (e.g. /dev/ttya).";
903 sparclite_ops.to_open = sparclite_open;
904 sparclite_ops.to_close = sparclite_close;
905 sparclite_ops.to_attach = 0;
4ef1f467
DT
906 sparclite_ops.to_post_attach = NULL;
907 sparclite_ops.to_require_attach = NULL;
908 sparclite_ops.to_detach = 0;
909 sparclite_ops.to_require_detach = NULL;
c719b714 910 sparclite_ops.to_resume = 0;
4ef1f467
DT
911 sparclite_ops.to_wait = 0;
912 sparclite_ops.to_post_wait = NULL;
c719b714
JM
913 sparclite_ops.to_fetch_registers = 0;
914 sparclite_ops.to_store_registers = 0;
915 sparclite_ops.to_prepare_to_store = 0;
916 sparclite_ops.to_xfer_memory = 0;
917 sparclite_ops.to_files_info = 0;
918 sparclite_ops.to_insert_breakpoint = 0;
919 sparclite_ops.to_remove_breakpoint = 0;
920 sparclite_ops.to_terminal_init = 0;
921 sparclite_ops.to_terminal_inferior = 0;
922 sparclite_ops.to_terminal_ours_for_output = 0;
923 sparclite_ops.to_terminal_ours = 0;
924 sparclite_ops.to_terminal_info = 0;
925 sparclite_ops.to_kill = 0;
926 sparclite_ops.to_load = sparclite_download;
927 sparclite_ops.to_lookup_symbol = 0;
4ef1f467
DT
928 sparclite_ops.to_create_inferior = 0;
929 sparclite_ops.to_post_startup_inferior = NULL;
930 sparclite_ops.to_acknowledge_created_inferior = NULL;
931 sparclite_ops.to_clone_and_follow_inferior = NULL;
932 sparclite_ops.to_post_follow_inferior_by_clone = NULL;
933 sparclite_ops.to_insert_fork_catchpoint = NULL;
934 sparclite_ops.to_remove_fork_catchpoint = NULL;
935 sparclite_ops.to_insert_vfork_catchpoint = NULL;
936 sparclite_ops.to_remove_vfork_catchpoint = NULL;
937 sparclite_ops.to_has_forked = NULL;
938 sparclite_ops.to_has_vforked = NULL;
939 sparclite_ops.to_can_follow_vfork_prior_to_exec = NULL;
940 sparclite_ops.to_post_follow_vfork = NULL;
941 sparclite_ops.to_insert_exec_catchpoint = NULL;
942 sparclite_ops.to_remove_exec_catchpoint = NULL;
943 sparclite_ops.to_has_execd = NULL;
944 sparclite_ops.to_reported_exec_events_per_exec_call = NULL;
945 sparclite_ops.to_has_exited = NULL;
c719b714
JM
946 sparclite_ops.to_mourn_inferior = 0;
947 sparclite_ops.to_can_run = 0;
948 sparclite_ops.to_notice_signals = 0;
949 sparclite_ops.to_thread_alive = 0;
4ef1f467
DT
950 sparclite_ops.to_stop = 0;
951 sparclite_ops.to_pid_to_exec_file = NULL;
952 sparclite_ops.to_core_file_to_sym_file = NULL;
c719b714
JM
953 sparclite_ops.to_stratum = download_stratum;
954 sparclite_ops.DONT_USE = 0;
955 sparclite_ops.to_has_all_memory = 0;
956 sparclite_ops.to_has_memory = 0;
957 sparclite_ops.to_has_stack = 0;
958 sparclite_ops.to_has_registers = 0;
959 sparclite_ops.to_has_execution = 0;
960 sparclite_ops.to_sections = 0;
961 sparclite_ops.to_sections_end = 0;
962 sparclite_ops.to_magic = OPS_MAGIC ;
963} /* init_sparclite_ops */
0e887539
SG
964
965void
966_initialize_sparcl_tdep ()
967{
c719b714 968 init_sparclite_ops() ;
0e887539
SG
969 add_target (&sparclite_ops);
970}