1 /* Target dependent code for the Fujitsu SPARClite for GDB, the GNU debugger.
2 Copyright 1994, 1995, 1996, 1999 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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. */
23 #include "breakpoint.h"
26 #include <sys/types.h>
28 #if (!defined(__GO32__) && !defined(_WIN32)) || defined(__CYGWIN32__)
31 #include <sys/socket.h>
32 #include <netinet/in.h>
36 static struct target_ops sparclite_ops;
38 static char *remote_target_name = NULL;
39 static serial_t remote_desc = NULL;
40 static int serial_flag;
42 static int udp_fd = -1;
45 static serial_t open_tty (char *name);
46 static int send_resp (serial_t desc, char c);
47 static void close_tty (void * ignore);
49 static int recv_udp_buf (int fd, unsigned char *buf, int len, int timeout);
50 static int send_udp_buf (int fd, unsigned char *buf, int len);
52 static void sparclite_open (char *name, int from_tty);
53 static void sparclite_close (int quitting);
54 static void download (char *target_name, char *args, int from_tty,
55 void (*write_routine) (bfd * from_bfd,
58 bfd_vma to_addr, int len),
59 void (*start_routine) (bfd_vma entry));
60 static void sparclite_serial_start (bfd_vma entry);
61 static void sparclite_serial_write (bfd * from_bfd, asection * from_sec,
63 bfd_vma to_addr, int len);
65 static unsigned short calc_checksum (unsigned char *buffer, int count);
66 static void sparclite_udp_start (bfd_vma entry);
67 static void sparclite_udp_write (bfd * from_bfd, asection * from_sec,
68 file_ptr from_addr, bfd_vma to_addr,
71 static void sparclite_download (char *filename, int from_tty);
73 #define DDA2_SUP_ASI 0xb000000
74 #define DDA1_SUP_ASI 0xb0000
76 #define DDA2_ASI_MASK 0xff000000
77 #define DDA1_ASI_MASK 0xff0000
78 #define DIA2_SUP_MODE 0x8000
79 #define DIA1_SUP_MODE 0x4000
80 #define DDA2_ENABLE 0x100
81 #define DDA1_ENABLE 0x80
82 #define DIA2_ENABLE 0x40
83 #define DIA1_ENABLE 0x20
84 #define DSINGLE_STEP 0x10 /* not used */
85 #define DDV_TYPE_MASK 0xc
86 #define DDV_TYPE_LOAD 0x0
87 #define DDV_TYPE_STORE 0x4
88 #define DDV_TYPE_ACCESS 0x8
89 #define DDV_TYPE_ALWAYS 0xc
94 sparclite_insert_watchpoint (CORE_ADDR addr, int len, int type)
98 dcr = read_register (DCR_REGNUM);
100 if (!(dcr & DDA1_ENABLE))
102 write_register (DDA1_REGNUM, addr);
103 dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK);
104 dcr |= (DDA1_SUP_ASI | DDA1_ENABLE);
107 write_register (DDV1_REGNUM, 0);
108 write_register (DDV2_REGNUM, 0xffffffff);
109 dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK));
113 write_register (DDV1_REGNUM, 0);
114 write_register (DDV2_REGNUM, 0xffffffff);
115 dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK));
119 write_register (DDV1_REGNUM, 0);
120 write_register (DDV2_REGNUM, 0xffffffff);
121 dcr |= (DDV_TYPE_ACCESS);
123 write_register (DCR_REGNUM, dcr);
125 else if (!(dcr & DDA2_ENABLE))
127 write_register (DDA2_REGNUM, addr);
128 dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK);
129 dcr |= (DDA2_SUP_ASI | DDA2_ENABLE);
132 write_register (DDV1_REGNUM, 0);
133 write_register (DDV2_REGNUM, 0xffffffff);
134 dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK);
138 write_register (DDV1_REGNUM, 0);
139 write_register (DDV2_REGNUM, 0xffffffff);
140 dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK);
144 write_register (DDV1_REGNUM, 0);
145 write_register (DDV2_REGNUM, 0xffffffff);
146 dcr |= (DDV_TYPE_ACCESS);
148 write_register (DCR_REGNUM, dcr);
157 sparclite_remove_watchpoint (CORE_ADDR addr, int len, int type)
159 CORE_ADDR dcr, dda1, dda2;
161 dcr = read_register (DCR_REGNUM);
162 dda1 = read_register (DDA1_REGNUM);
163 dda2 = read_register (DDA2_REGNUM);
165 if ((dcr & DDA1_ENABLE) && addr == dda1)
166 write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE));
167 else if ((dcr & DDA2_ENABLE) && addr == dda2)
168 write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE));
176 sparclite_insert_hw_breakpoint (CORE_ADDR addr, int len)
180 dcr = read_register (DCR_REGNUM);
182 if (!(dcr & DIA1_ENABLE))
184 write_register (DIA1_REGNUM, addr);
185 write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE));
187 else if (!(dcr & DIA2_ENABLE))
189 write_register (DIA2_REGNUM, addr);
190 write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE));
199 sparclite_remove_hw_breakpoint (CORE_ADDR addr, int shadow)
201 CORE_ADDR dcr, dia1, dia2;
203 dcr = read_register (DCR_REGNUM);
204 dia1 = read_register (DIA1_REGNUM);
205 dia2 = read_register (DIA2_REGNUM);
207 if ((dcr & DIA1_ENABLE) && addr == dia1)
208 write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE));
209 else if ((dcr & DIA2_ENABLE) && addr == dia2)
210 write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE));
218 sparclite_check_watch_resources (int type, int cnt, int ot)
220 /* Watchpoints not supported on simulator. */
221 if (strcmp (target_shortname, "sim") == 0)
224 if (type == bp_hardware_breakpoint)
226 if (TARGET_HW_BREAK_LIMIT == 0)
228 else if (cnt <= TARGET_HW_BREAK_LIMIT)
233 if (TARGET_HW_WATCH_LIMIT == 0)
237 else if (cnt <= TARGET_HW_WATCH_LIMIT)
244 sparclite_stopped_data_address (void)
246 CORE_ADDR dsr, dda1, dda2;
248 dsr = read_register (DSR_REGNUM);
249 dda1 = read_register (DDA1_REGNUM);
250 dda2 = read_register (DDA2_REGNUM);
261 open_tty (char *name)
265 desc = SERIAL_OPEN (name);
267 perror_with_name (name);
271 if (SERIAL_SETBAUDRATE (desc, baud_rate))
274 perror_with_name (name);
280 SERIAL_FLUSH_INPUT (desc);
285 /* Read a single character from the remote end, masking it down to 7 bits. */
288 readchar (serial_t desc, int timeout)
293 ch = SERIAL_READCHAR (desc, timeout);
298 error ("SPARClite remote connection closed");
300 perror_with_name ("SPARClite communication error");
302 error ("SPARClite remote timeout");
304 if (remote_debug > 0)
306 sprintf (s, "[%02x]", ch & 0xff);
307 puts_debug ("read -->", s, "<--");
314 debug_serial_write (serial_t desc, char *buf, int len)
318 SERIAL_WRITE (desc, buf, len);
319 if (remote_debug > 0)
323 sprintf (s, "[%02x]", *buf & 0xff);
324 puts_debug ("Sent -->", s, "<--");
332 send_resp (serial_t desc, char c)
334 debug_serial_write (desc, &c, 1);
335 return readchar (desc, remote_timeout);
339 close_tty (void *ignore)
344 SERIAL_CLOSE (remote_desc);
351 recv_udp_buf (int fd, unsigned char *buf, int len, int timeout)
357 FD_SET (fd, &readfds);
361 struct timeval timebuf;
363 timebuf.tv_sec = timeout;
365 cc = select (fd + 1, &readfds, 0, 0, &timebuf);
368 cc = select (fd + 1, &readfds, 0, 0, 0);
374 perror_with_name ("recv_udp_buf: Bad return value from select:");
376 cc = recv (fd, buf, len, 0);
379 perror_with_name ("Got an error from recv: ");
383 send_udp_buf (int fd, unsigned char *buf, int len)
387 cc = send (fd, buf, len, 0);
393 perror_with_name ("Got an error from send: ");
395 error ("Short count in send: tried %d, sent %d\n", len, cc);
397 #endif /* HAVE_SOCKETS */
400 sparclite_open (char *name, int from_tty)
402 struct cleanup *old_chain;
407 error ("You need to specify what device or hostname is associated with the SparcLite board.");
409 target_preopen (from_tty);
411 unpush_target (&sparclite_ops);
413 if (remote_target_name)
414 free (remote_target_name);
416 remote_target_name = strsave (name);
418 /* We need a 'serial' or 'udp' keyword to disambiguate host:port, which can
419 mean either a serial port on a terminal server, or the IP address of a
420 SPARClite demo board. If there's no colon, then it pretty much has to be
421 a local device (except for DOS... grrmble) */
423 p = strchr (name, ' ');
428 while ((*p != '\000') && isspace (*p))
431 if (strncmp (name, "serial", strlen (name)) == 0)
433 else if (strncmp (name, "udp", strlen (name)) == 0)
436 error ("Must specify either `serial' or `udp'.");
442 if (!strchr (name, ':'))
443 serial_flag = 1; /* No colon is unambiguous (local device) */
445 error ("Usage: target sparclite serial /dev/ttyb\n\
446 or: target sparclite udp host");
451 remote_desc = open_tty (p);
453 old_chain = make_cleanup (close_tty, 0 /*ignore*/);
455 c = send_resp (remote_desc, 0x00);
458 error ("Unknown response (0x%x) from SparcLite. Try resetting the board.",
461 c = send_resp (remote_desc, 0x55);
464 error ("Sparclite appears to be ill.");
470 struct sockaddr_in sockaddr;
471 unsigned char buffer[100];
474 /* Setup the socket. Must be raw UDP. */
476 he = gethostbyname (p);
479 error ("No such host %s.", p);
481 udp_fd = socket (PF_INET, SOCK_DGRAM, 0);
483 old_chain = make_cleanup (close, udp_fd);
485 sockaddr.sin_family = PF_INET;
486 sockaddr.sin_port = htons (7000);
487 memcpy (&sockaddr.sin_addr.s_addr, he->h_addr, sizeof (struct in_addr));
489 if (connect (udp_fd, &sockaddr, sizeof (sockaddr)))
490 perror_with_name ("Connect failed");
495 send_udp_buf (udp_fd, buffer, 2); /* Request version */
496 cc = recv_udp_buf (udp_fd, buffer, sizeof (buffer), 5); /* Get response */
498 error ("SPARClite isn't responding.");
501 error ("SPARClite appears to be ill.");
503 error ("UDP downloading is not supported for DOS hosts.");
504 #endif /* HAVE_SOCKETS */
507 printf_unfiltered ("[SPARClite appears to be alive]\n");
509 push_target (&sparclite_ops);
511 discard_cleanups (old_chain);
517 sparclite_close (int quitting)
522 else if (udp_fd != -1)
527 #define LOAD_ADDRESS 0x40000000
530 download (char *target_name, char *args, int from_tty,
531 void (*write_routine) (bfd *from_bfd, asection *from_sec,
532 file_ptr from_addr, bfd_vma to_addr, int len),
533 void (*start_routine) (bfd_vma entry))
535 struct cleanup *old_chain;
540 #define WRITESIZE 1024
549 while (*args != '\000')
553 while (isspace (*args))
558 while ((*args != '\000') && !isspace (*args))
566 else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
568 else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
571 error ("unknown option `%s'", arg);
575 filename = get_exec_file (1);
577 pbfd = bfd_openr (filename, gnutarget);
580 perror_with_name (filename);
583 old_chain = make_cleanup_bfd_close (pbfd);
585 if (!bfd_check_format (pbfd, bfd_object))
586 error ("\"%s\" is not an object file: %s", filename,
587 bfd_errmsg (bfd_get_error ()));
589 for (section = pbfd->sections; section; section = section->next)
591 if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
593 bfd_vma section_address;
594 bfd_size_type section_size;
596 const char *section_name;
598 section_name = bfd_get_section_name (pbfd, section);
600 section_address = bfd_get_section_vma (pbfd, section);
602 /* Adjust sections from a.out files, since they don't
603 carry their addresses with. */
604 if (bfd_get_flavour (pbfd) == bfd_target_aout_flavour)
606 if (strcmp (section_name, ".text") == 0)
607 section_address = bfd_get_start_address (pbfd);
608 else if (strcmp (section_name, ".data") == 0)
610 /* Read the first 8 bytes of the data section.
611 There should be the string 'DaTa' followed by
612 a word containing the actual section address. */
615 char signature[4]; /* 'DaTa' */
616 unsigned char sdata[4]; /* &sdata */
619 bfd_get_section_contents (pbfd, section, &marker, 0,
621 if (strncmp (marker.signature, "DaTa", 4) == 0)
623 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
624 section_address = bfd_getb32 (marker.sdata);
626 section_address = bfd_getl32 (marker.sdata);
631 section_size = bfd_get_section_size_before_reloc (section);
634 printf_filtered ("[Loading section %s at 0x%x (%d bytes)]\n",
635 bfd_get_section_name (pbfd, section),
640 while (section_size > 0)
643 static char inds[] = "|/-\\";
648 count = min (section_size, WRITESIZE);
650 write_routine (pbfd, section, fptr, section_address, count);
654 printf_unfiltered ("\r%c", inds[k++ % 4]);
655 gdb_flush (gdb_stdout);
658 section_address += count;
660 section_size -= count;
667 entry = bfd_get_start_address (pbfd);
670 printf_unfiltered ("[Starting %s at 0x%x]\n", filename, entry);
672 start_routine (entry);
675 do_cleanups (old_chain);
679 sparclite_serial_start (bfd_vma entry)
685 store_unsigned_integer (buffer + 1, 4, entry);
687 debug_serial_write (remote_desc, buffer, 1 + 4);
688 i = readchar (remote_desc, remote_timeout);
690 error ("Can't start SparcLite. Error code %d\n", i);
694 sparclite_serial_write (bfd *from_bfd, asection *from_sec, file_ptr from_addr,
695 bfd_vma to_addr, int len)
697 char buffer[4 + 4 + WRITESIZE]; /* addr + len + data */
698 unsigned char checksum;
701 store_unsigned_integer (buffer, 4, to_addr); /* Address */
702 store_unsigned_integer (buffer + 4, 4, len); /* Length */
704 bfd_get_section_contents (from_bfd, from_sec, buffer + 8, from_addr, len);
707 for (i = 0; i < len; i++)
708 checksum += buffer[8 + i];
710 i = send_resp (remote_desc, 0x01);
713 error ("Bad response from load command (0x%x)", i);
715 debug_serial_write (remote_desc, buffer, 4 + 4 + len);
716 i = readchar (remote_desc, remote_timeout);
719 error ("Bad checksum from load command (0x%x)", i);
724 static unsigned short
725 calc_checksum (unsigned char *buffer, int count)
727 unsigned short checksum;
730 for (; count > 0; count -= 2, buffer += 2)
731 checksum += (*buffer << 8) | *(buffer + 1);
734 checksum += *buffer << 8;
740 sparclite_udp_start (bfd_vma entry)
742 unsigned char buffer[6];
747 buffer[2] = entry >> 24;
748 buffer[3] = entry >> 16;
749 buffer[4] = entry >> 8;
752 send_udp_buf (udp_fd, buffer, 6); /* Send start addr */
753 i = recv_udp_buf (udp_fd, buffer, sizeof (buffer), -1); /* Get response */
755 if (i < 1 || buffer[0] != 0x55)
756 error ("Failed to take start address.");
760 sparclite_udp_write (bfd *from_bfd, asection *from_sec, file_ptr from_addr,
761 bfd_vma to_addr, int len)
763 unsigned char buffer[2000];
764 unsigned short checksum;
765 static int pkt_num = 0;
766 static unsigned long old_addr = -1;
771 if (to_addr != old_addr)
773 buffer[0] = 0x1; /* Load command */
774 buffer[1] = 0x1; /* Loading address */
775 buffer[2] = to_addr >> 24;
776 buffer[3] = to_addr >> 16;
777 buffer[4] = to_addr >> 8;
781 for (i = 0; i < 6; i++)
782 checksum += buffer[i];
785 send_udp_buf (udp_fd, buffer, 6);
786 i = recv_udp_buf (udp_fd, buffer, sizeof buffer, -1);
789 error ("Got back short checksum for load addr.");
791 if (checksum != buffer[0])
792 error ("Got back bad checksum for load addr.");
794 pkt_num = 0; /* Load addr resets packet seq # */
798 bfd_get_section_contents (from_bfd, from_sec, buffer + 6, from_addr,
801 checksum = calc_checksum (buffer + 6, len);
803 buffer[0] = 0x1; /* Load command */
804 buffer[1] = 0x2; /* Loading data */
805 buffer[2] = pkt_num >> 8;
807 buffer[4] = checksum >> 8;
808 buffer[5] = checksum;
810 send_udp_buf (udp_fd, buffer, len + 6);
811 i = recv_udp_buf (udp_fd, buffer, sizeof buffer, 3);
815 fprintf_unfiltered (gdb_stderr, "send_data: timeout sending %d bytes to address 0x%x retrying\n", len, to_addr);
819 if (buffer[0] != 0xff)
820 error ("Got back bad response for load data.");
829 #endif /* HAVE_SOCKETS */
832 sparclite_download (char *filename, int from_tty)
836 download (remote_target_name, filename, from_tty, sparclite_udp_write,
837 sparclite_udp_start);
839 abort (); /* sparclite_open should prevent this! */
842 download (remote_target_name, filename, from_tty, sparclite_serial_write,
843 sparclite_serial_start);
846 /* Set up the sparclite target vector. */
849 init_sparclite_ops (void)
851 sparclite_ops.to_shortname = "sparclite";
852 sparclite_ops.to_longname = "SPARClite download target";
853 sparclite_ops.to_doc = "Download to a remote SPARClite target board via serial of UDP.\n\
854 Specify the device it is connected to (e.g. /dev/ttya).";
855 sparclite_ops.to_open = sparclite_open;
856 sparclite_ops.to_close = sparclite_close;
857 sparclite_ops.to_load = sparclite_download;
858 sparclite_ops.to_stratum = download_stratum;
859 sparclite_ops.to_magic = OPS_MAGIC;
863 _initialize_sparcl_tdep (void)
865 init_sparclite_ops ();
866 add_target (&sparclite_ops);