1 /* Target communications support for Macraigor Systems' On-Chip Debugging
2 Copyright 1996, 1997 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, Boston, MA 02111-1307, USA. */
22 #include "gdb_string.h"
32 #include "gdb-stabs.h"
34 #include <sys/types.h>
39 /* Prototypes for local functions */
41 static int ocd_read_bytes PARAMS ((CORE_ADDR memaddr,
42 char *myaddr, int len));
44 static int ocd_start_remote PARAMS ((char *dummy));
46 static int readchar PARAMS ((int timeout));
48 static void reset_packet PARAMS ((void));
50 static void output_packet PARAMS ((void));
52 static int get_quoted_char PARAMS ((int timeout));
54 static void put_quoted_char PARAMS ((int c));
56 static void ocd_interrupt PARAMS ((int signo));
58 static void ocd_interrupt_twice PARAMS ((int signo));
60 static void interrupt_query PARAMS ((void));
62 static unsigned char * ocd_do_command PARAMS ((int cmd, int *statusp, int *lenp));
64 static void ocd_put_packet PARAMS ((unsigned char *packet, int pktlen));
66 static unsigned char * ocd_get_packet PARAMS ((int cmd, int *pktlen, int timeout));
68 static struct target_ops *current_ops = NULL;
70 static int last_run_status;
72 /* This was 5 seconds, which is a long time to sit and wait.
73 Unless this is going though some terminal server or multiplexer or
74 other form of hairy serial connection, I would think 2 seconds would
77 /* FIXME: Change to allow option to set timeout value on a per target
80 static int remote_timeout = 2;
82 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
83 ocd_open knows that we don't have a file open when the program
85 static serial_t ocd_desc = NULL;
88 ocd_error (s, error_code)
94 fputs_filtered (s, gdb_stderr);
95 fputs_filtered (" ", gdb_stderr);
99 case 0x1: s = "Unknown fault"; break;
100 case 0x2: s = "Power failed"; break;
101 case 0x3: s = "Cable disconnected"; break;
102 case 0x4: s = "Couldn't enter OCD mode"; break;
103 case 0x5: s = "Target stuck in reset"; break;
104 case 0x6: s = "OCD hasn't been initialized"; break;
105 case 0x7: s = "Write verify failed"; break;
106 case 0x8: s = "Reg buff error (during MPC5xx fp reg read/write)"; break;
107 case 0x9: s = "Invalid CPU register access attempt failed"; break;
108 case 0x11: s = "Bus error"; break;
109 case 0x12: s = "Checksum error"; break;
110 case 0x13: s = "Illegal command"; break;
111 case 0x14: s = "Parameter error"; break;
112 case 0x15: s = "Internal error"; break;
113 case 0x80: s = "Flash erase error"; break;
115 sprintf (buf, "Unknown error code %d", error_code);
122 /* Return nonzero if the thread TH is still alive on the remote system. */
125 ocd_thread_alive (th)
131 /* Clean up connection to a remote debugger. */
139 SERIAL_CLOSE (ocd_desc);
143 /* Stub for catch_errors. */
146 ocd_start_remote (dummy)
149 unsigned char buf[10], *p;
154 enum ocd_target_type target_type;
156 target_type = (enum ocd_target_type)dummy;
158 immediate_quit = 1; /* Allow user to interrupt it */
160 SERIAL_SEND_BREAK (ocd_desc); /* Wake up the wiggler */
162 speed = 80; /* Divide clock by 4000 */
166 buf[2] = speed & 0xff;
167 buf[3] = target_type;
168 ocd_put_packet (buf, 4); /* Init OCD params */
169 p = ocd_get_packet (buf[0], &pktlen, remote_timeout);
172 error ("Truncated response packet from OCD device");
178 ocd_error ("OCD_INIT:", error_code);
180 ocd_do_command (OCD_AYT, &status, &pktlen);
182 p = ocd_do_command (OCD_GET_VERSION, &status, &pktlen);
184 printf_unfiltered ("[Wiggler version %x.%x, capability 0x%x]\n",
185 p[0], p[1], (p[2] << 16) | p[3]);
188 /* Reset the target */
190 ocd_do_command (OCD_RESET_RUN, &status, &pktlen);
191 /* ocd_do_command (OCD_RESET, &status, &pktlen);*/
194 /* If processor is still running, stop it. */
196 if (!(status & OCD_FLAG_BDM))
200 /* When using a target box, we want to asynchronously return status when
201 target stops. The OCD_SET_CTL_FLAGS command is ignored by Wigglers.dll
202 when using a parallel Wiggler */
203 buf[0] = OCD_SET_CTL_FLAGS;
206 ocd_put_packet (buf, 3);
208 p = ocd_get_packet (buf[0], &pktlen, remote_timeout);
211 error ("Truncated response packet from OCD device");
217 ocd_error ("OCD_SET_CTL_FLAGS:", error_code);
222 /* This is really the job of start_remote however, that makes an assumption
223 that the target is about to print out a status message of some sort. That
224 doesn't happen here (in fact, it may not be possible to get the monitor to
225 send the appropriate packet). */
227 flush_cached_frames ();
228 registers_changed ();
229 stop_pc = read_pc ();
230 set_current_frame (create_new_frame (read_fp (), stop_pc));
231 select_frame (get_current_frame (), 0);
232 print_stack_frame (selected_frame, -1, 1);
234 buf[0] = OCD_LOG_FILE;
235 buf[1] = 3; /* close existing WIGGLERS.LOG */
236 ocd_put_packet (buf, 2);
237 p = ocd_get_packet (buf[0], &pktlen, remote_timeout);
239 buf[0] = OCD_LOG_FILE;
240 buf[1] = 2; /* append to existing WIGGLERS.LOG */
241 ocd_put_packet (buf, 2);
242 p = ocd_get_packet (buf[0], &pktlen, remote_timeout);
247 /* Open a connection to a remote debugger.
248 NAME is the filename used for communication. */
250 static DCACHE *ocd_dcache;
253 ocd_open (name, from_tty, target_type, ops)
256 enum ocd_target_type target_type;
257 struct target_ops *ops;
259 unsigned char buf[10], *p;
264 error ("To open an OCD connection, you need to specify the\n\
265 device the OCD device is attached to (e.g. /dev/ttya).");
267 target_preopen (from_tty);
271 unpush_target (current_ops);
273 ocd_dcache = dcache_init (ocd_read_bytes, ocd_write_bytes);
275 if (strncmp(name,"wiggler",7) == 0)
277 ocd_desc = SERIAL_OPEN ("ocd");
279 perror_with_name (name);
281 buf[0] = OCD_LOG_FILE;
282 buf[1] = 1; /* open new or overwrite existing WIGGLERS.LOG */
283 ocd_put_packet (buf, 2);
284 p = ocd_get_packet (buf[0], &pktlen, remote_timeout);
286 buf[0] = OCD_SET_CONNECTION;
287 buf[1] = 0x01; /* atoi (name[11]); */
288 ocd_put_packet (buf, 2);
289 p = ocd_get_packet (buf[0], &pktlen, remote_timeout);
291 else /* not using Wigglers.dll */
293 ocd_desc = SERIAL_OPEN (name);
295 perror_with_name (name);
300 if (SERIAL_SETBAUDRATE (ocd_desc, baud_rate))
302 SERIAL_CLOSE (ocd_desc);
303 perror_with_name (name);
307 SERIAL_RAW (ocd_desc);
309 /* If there is something sitting in the buffer we might take it as a
310 response to a command, which would be bad. */
311 SERIAL_FLUSH_INPUT (ocd_desc);
315 puts_filtered ("Remote target wiggler connected to ");
316 puts_filtered (name);
317 puts_filtered ("\n");
319 push_target (current_ops); /* Switch to using remote target now */
321 /* Without this, some commands which require an active target (such as kill)
322 won't work. This variable serves (at least) double duty as both the pid
323 of the target process (if it has such), and as a flag indicating that a
324 target is active. These functions should be split out into seperate
325 variables, especially since GDB will someday have a notion of debugging
326 several processes. */
328 inferior_pid = 42000;
329 /* Start the remote connection; if error (0), discard this target.
330 In particular, if the user quits, be sure to discard it
331 (we'd be in an inconsistent state otherwise). */
332 if (!catch_errors (ocd_start_remote, (char *)target_type,
333 "Couldn't establish connection to remote target\n",
337 error ("Failed to connect to OCD.");
341 /* This takes a program previously attached to and detaches it. After
342 this is done, GDB can be used to debug some other program. We
343 better not have left any breakpoints in the target program or it'll
344 die when it hits one. */
347 ocd_detach (args, from_tty)
352 error ("Argument given to \"detach\" when remotely debugging.");
356 puts_filtered ("Ending remote debugging.\n");
359 /* Tell the remote machine to resume. */
362 ocd_resume (pid, step, siggnal)
364 enum target_signal siggnal;
368 dcache_flush (ocd_dcache);
371 ocd_do_command (OCD_STEP, &last_run_status, &pktlen);
373 ocd_do_command (OCD_RUN, &last_run_status, &pktlen);
382 ocd_do_command (OCD_STOP, &status, &pktlen);
384 if (!(status & OCD_FLAG_BDM))
385 error ("Can't stop target via BDM");
388 static volatile int ocd_interrupt_flag;
390 /* Send ^C to target to halt it. Target will respond, and send us a
394 ocd_interrupt (signo)
397 /* If this doesn't work, try more severe steps. */
398 signal (signo, ocd_interrupt_twice);
401 printf_unfiltered ("ocd_interrupt called\n");
408 ocd_put_packet (buf, 1);
409 ocd_interrupt_flag = 1;
413 static void (*ofunc)();
415 /* The user typed ^C twice. */
417 ocd_interrupt_twice (signo)
420 signal (signo, ofunc);
424 signal (signo, ocd_interrupt);
427 /* Ask the user what to do when an interrupt is received. */
432 target_terminal_ours ();
434 if (query ("Interrupted while waiting for the program.\n\
435 Give up (and stop debugging it)? "))
437 target_mourn_inferior ();
438 return_to_top_level (RETURN_QUIT);
441 target_terminal_inferior ();
444 /* If nonzero, ignore the next kill. */
445 static int kill_kludge;
447 /* Wait until the remote machine stops, then return,
448 storing status in STATUS just as `wait' would.
449 Returns "pid" (though it's not clear what, if anything, that
450 means in the case of this target). */
460 ocd_interrupt_flag = 0;
462 /* Target might already be stopped by the time we get here. */
463 /* If we aren't already stopped, we need to loop until we've dropped
464 back into BDM mode */
466 while (!(last_run_status & OCD_FLAG_BDM))
469 ocd_put_packet (buf, 1);
470 p = ocd_get_packet (OCD_AYT, &pktlen, -1);
472 ofunc = (void (*)()) signal (SIGINT, ocd_interrupt);
473 signal (SIGINT, ofunc);
476 error ("Truncated response packet from OCD device");
478 last_run_status = p[1];
482 ocd_error ("target_wait:", error_code);
484 if (last_run_status & OCD_FLAG_PWF)
485 error ("OCD device lost VCC at BDM interface.");
486 else if (last_run_status & OCD_FLAG_CABLE_DISC)
487 error ("OCD device cable appears to have been disconnected.");
490 if (ocd_interrupt_flag)
496 /* Read registers from the OCD device. Specify the starting and ending
497 register number. Return the number of regs actually read in *NUMREGS.
498 Returns a pointer to a static array containing the register contents. */
501 ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, reglen)
506 unsigned char buf[10];
510 int error_code, status;
513 buf[0] = OCD_READ_REGS;
514 buf[1] = first_bdm_regno >> 8;
515 buf[2] = first_bdm_regno & 0xff;
516 buf[3] = last_bdm_regno >> 8;
517 buf[4] = last_bdm_regno & 0xff;
519 ocd_put_packet (buf, 5);
520 p = ocd_get_packet (OCD_READ_REGS, &pktlen, remote_timeout);
526 ocd_error ("read_bdm_registers:", error_code);
534 error ("Register block size bad: %d", i);
543 /* Read register BDM_REGNO and returns its value ala read_register() */
546 ocd_read_bdm_register (bdm_regno)
553 p = ocd_read_bdm_registers (bdm_regno, bdm_regno, ®len);
554 regval = extract_unsigned_integer (p, reglen);
560 ocd_write_bdm_registers (first_bdm_regno, regptr, reglen)
562 unsigned char *regptr;
567 int error_code, status;
570 buf = alloca (4 + reglen);
572 buf[0] = OCD_WRITE_REGS;
573 buf[1] = first_bdm_regno >> 8;
574 buf[2] = first_bdm_regno & 0xff;
576 memcpy (buf + 4, regptr, reglen);
578 ocd_put_packet (buf, 4 + reglen);
579 p = ocd_get_packet (OCD_WRITE_REGS, &pktlen, remote_timeout);
582 error ("Truncated response packet from OCD device");
588 ocd_error ("ocd_write_bdm_registers:", error_code);
592 ocd_write_bdm_register (bdm_regno, reg)
596 unsigned char buf[4];
598 store_unsigned_integer (buf, 4, reg);
600 ocd_write_bdm_registers (bdm_regno, buf, 4);
604 ocd_prepare_to_store ()
608 /* Write memory data directly to the remote machine.
609 This does not inform the data cache; the data cache uses this.
610 MEMADDR is the address in the remote memory space.
611 MYADDR is the address of the buffer in our space.
612 LEN is the number of bytes.
614 Returns number of bytes transferred, or 0 for error. */
616 static int write_mem_command = OCD_WRITE_MEM;
619 ocd_write_bytes (memaddr, myaddr, len)
630 buf[0] = write_mem_command;
631 buf[5] = 1; /* Write as bytes */
632 buf[6] = 0; /* Don't verify */
638 int status, error_code;
640 numbytes = min (len, 256 - 8);
642 buf[1] = memaddr >> 24;
643 buf[2] = memaddr >> 16;
644 buf[3] = memaddr >> 8;
649 memcpy (&buf[8], myaddr, numbytes);
650 ocd_put_packet (buf, 8 + numbytes);
651 p = ocd_get_packet (OCD_WRITE_MEM, &pktlen, remote_timeout);
653 error ("Truncated response packet from OCD device");
658 if (error_code == 0x11) /* Got a bus error? */
660 CORE_ADDR error_address;
662 error_address = p[3] << 24;
663 error_address |= p[4] << 16;
664 error_address |= p[5] << 8;
665 error_address |= p[6];
666 numbytes = error_address - memaddr;
674 else if (error_code != 0)
675 ocd_error ("ocd_write_bytes:", error_code);
682 return origlen - len;
685 /* Read memory data directly from the remote machine.
686 This does not use the data cache; the data cache uses this.
687 MEMADDR is the address in the remote memory space.
688 MYADDR is the address of the buffer in our space.
689 LEN is the number of bytes.
691 Returns number of bytes transferred, or 0 for error. */
694 ocd_read_bytes (memaddr, myaddr, len)
705 buf[0] = OCD_READ_MEM;
706 buf[5] = 1; /* Read as bytes */
712 int status, error_code;
714 numbytes = min (len, 256 - 7);
716 buf[1] = memaddr >> 24;
717 buf[2] = memaddr >> 16;
718 buf[3] = memaddr >> 8;
723 ocd_put_packet (buf, 7);
724 p = ocd_get_packet (OCD_READ_MEM, &pktlen, remote_timeout);
726 error ("Truncated response packet from OCD device");
731 if (error_code == 0x11) /* Got a bus error? */
733 CORE_ADDR error_address;
735 error_address = p[3] << 24;
736 error_address |= p[4] << 16;
737 error_address |= p[5] << 8;
738 error_address |= p[6];
739 numbytes = error_address - memaddr;
747 else if (error_code != 0)
748 ocd_error ("ocd_read_bytes:", error_code);
750 memcpy (myaddr, &p[4], numbytes);
757 return origlen - len;
760 /* Read or write LEN bytes from inferior memory at MEMADDR, transferring
761 to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is
762 nonzero. Returns length of data written or read; 0 for error. */
766 ocd_xfer_memory (memaddr, myaddr, len, should_write, target)
771 struct target_ops *target; /* ignored */
773 return dcache_xfer_memory (ocd_dcache, memaddr, myaddr, len, should_write);
777 ocd_files_info (ignore)
778 struct target_ops *ignore;
780 puts_filtered ("Debugging a target over a serial line.\n");
783 /* Stuff for dealing with the packets which are part of this protocol.
784 See comment at top of file for details. */
786 /* Read a single character from the remote side, handling wierd errors. */
794 ch = SERIAL_READCHAR (ocd_desc, timeout);
799 error ("Remote connection closed");
801 perror_with_name ("Remote communication error");
809 /* Read a character from the data stream, dequoting as necessary. SYN is
810 treated special. Any SYNs appearing in the data stream are returned as the
811 distinct value RAW_SYN (which has a value > 8 bits and therefore cannot be
812 mistaken for real data). */
815 get_quoted_char (timeout)
820 ch = readchar (timeout);
825 error ("Timeout in mid-packet, aborting");
829 ch = readchar (timeout);
838 static unsigned char pkt[256 * 2 + 10], *pktp; /* Worst case */
849 if (SERIAL_WRITE (ocd_desc, pkt, pktp - pkt))
850 perror_with_name ("output_packet: write failed");
855 /* Output a quoted character. SYNs and DLEs are quoted. Everything else goes
856 through untouched. */
873 /* Send a packet to the OCD device. The packet framed by a SYN character,
874 a byte count and a checksum. The byte count only counts the number of
875 bytes between the count and the checksum. A count of zero actually
876 means 256. Any SYNs within the packet (including the checksum and
877 count) must be quoted. The quote character must be quoted as well.
878 Quoting is done by replacing the character with the two-character sequence
879 DLE, {char} | 0100. Note that the quoting mechanism has no effect on the
883 stu_put_packet (buf, len)
887 unsigned char checksum;
890 if (len == 0 || len > 256)
891 abort (); /* Can't represent 0 length packet */
897 put_quoted_char (RAW_SYN);
911 put_quoted_char (-checksum & 0xff);
918 /* Send a packet to the OCD device. The packet framed by a SYN character,
919 a byte count and a checksum. The byte count only counts the number of
920 bytes between the count and the checksum. A count of zero actually
921 means 256. Any SYNs within the packet (including the checksum and
922 count) must be quoted. The quote character must be quoted as well.
923 Quoting is done by replacing the character with the two-character sequence
924 DLE, {char} | 0100. Note that the quoting mechanism has no effect on the
928 ocd_put_packet (buf, len)
932 unsigned char checksum;
934 unsigned char *packet, *packet_ptr;
936 packet = alloca (len + 1 + 1); /* packet + SYN + checksum */
941 *packet_ptr++ = 0x55;
951 *packet_ptr++ = -checksum;
952 if (SERIAL_WRITE (ocd_desc, packet, packet_ptr - packet))
953 perror_with_name ("output_packet: write failed");
958 /* Get a packet from the OCD device. Timeout is only enforced for the
959 first byte of the packet. Subsequent bytes are expected to arrive in
960 time <= remote_timeout. Returns a pointer to a static buffer containing
961 the payload of the packet. *LENP contains the length of the packet.
964 static unsigned char *
965 stu_get_packet (cmd, lenp, timeout)
971 static unsigned char buf[256 + 10], *p;
972 unsigned char checksum;
976 ch = get_quoted_char (timeout);
979 error ("get_packet (readchar): %d", ch);
984 found_syn: /* Found the start of a packet */
989 len = get_quoted_char (remote_timeout);
999 len++; /* Include checksum */
1003 ch = get_quoted_char (remote_timeout);
1015 error ("Response phase error. Got 0x%x, expected 0x%x", buf[0], cmd);
1017 *lenp = p - buf - 1;
1023 /* Get a packet from the OCD device. Timeout is only enforced for the
1024 first byte of the packet. Subsequent bytes are expected to arrive in
1025 time <= remote_timeout. Returns a pointer to a static buffer containing
1026 the payload of the packet. *LENP contains the length of the packet.
1029 static unsigned char *
1030 ocd_get_packet (cmd, lenp, timeout)
1037 static unsigned char packet[512];
1038 unsigned char *packet_ptr;
1039 unsigned char checksum;
1041 ch = readchar (timeout);
1044 error ("ocd_get_packet (readchar): %d", ch);
1047 error ("ocd_get_packet (readchar): %d", ch);
1049 /* Found the start of a packet */
1051 packet_ptr = packet;
1054 /* Read command char. That sort of tells us how long the packet is. */
1056 ch = readchar (timeout);
1059 error ("ocd_get_packet (readchar): %d", ch);
1066 ch = readchar (timeout);
1069 error ("ocd_get_packet (readchar): %d", ch);
1073 /* Get error code. */
1075 ch = readchar (timeout);
1078 error ("ocd_get_packet (readchar): %d", ch);
1082 switch (ch) /* Figure out length of packet */
1084 case 0x7: /* Write verify error? */
1085 len = 8; /* write address, value read back */
1087 case 0x11: /* Bus error? */
1088 /* write address, read flag */
1089 case 0x15: /* Internal error */
1090 len = 5; /* error code, vector */
1092 default: /* Error w/no params */
1095 case 0x0: /* Normal result */
1098 case OCD_AYT: /* Are You There? */
1099 case OCD_SET_BAUD_RATE: /* Set Baud Rate */
1100 case OCD_INIT: /* Initialize OCD device */
1101 case OCD_SET_SPEED: /* Set Speed */
1102 case OCD_SET_FUNC_CODE: /* Set Function Code */
1103 case OCD_SET_CTL_FLAGS: /* Set Control Flags */
1104 case OCD_SET_BUF_ADDR: /* Set Register Buffer Address */
1105 case OCD_RUN: /* Run Target from PC */
1106 case OCD_RUN_ADDR: /* Run Target from Specified Address */
1107 case OCD_STOP: /* Stop Target */
1108 case OCD_RESET_RUN: /* Reset Target and Run */
1109 case OCD_RESET: /* Reset Target and Halt */
1110 case OCD_STEP: /* Single Step */
1111 case OCD_WRITE_REGS: /* Write Register */
1112 case OCD_WRITE_MEM: /* Write Memory */
1113 case OCD_FILL_MEM: /* Fill Memory */
1114 case OCD_MOVE_MEM: /* Move Memory */
1115 case OCD_WRITE_INT_MEM: /* Write Internal Memory */
1116 case OCD_JUMP: /* Jump to Subroutine */
1117 case OCD_ERASE_FLASH: /* Erase flash memory */
1118 case OCD_PROGRAM_FLASH: /* Write flash memory */
1119 case OCD_EXIT_MON: /* Exit the flash programming monitor */
1120 case OCD_ENTER_MON: /* Enter the flash programming monitor */
1121 case OCD_LOG_FILE: /* Make Wigglers.dll save Wigglers.log */
1122 case OCD_SET_CONNECTION: /* Set type of connection in Wigglers.dll */
1125 case OCD_GET_VERSION: /* Get Version */
1128 case OCD_GET_STATUS_MASK: /* Get Status Mask */
1131 case OCD_GET_CTRS: /* Get Error Counters */
1132 case OCD_READ_REGS: /* Read Register */
1133 case OCD_READ_MEM: /* Read Memory */
1134 case OCD_READ_INT_MEM: /* Read Internal Memory */
1138 error ("ocd_get_packet: unknown packet type 0x%x\n", ch);
1142 if (len == 257) /* Byte stream? */
1143 { /* Yes, byte streams contain the length */
1144 ch = readchar (timeout);
1147 error ("ocd_get_packet (readchar): %d", ch);
1155 while (len-- >= 0) /* Do rest of packet and checksum */
1157 ch = readchar (timeout);
1160 error ("ocd_get_packet (readchar): %d", ch);
1166 error ("ocd_get_packet: bad packet checksum");
1168 if (cmd != -1 && cmd != packet[0])
1169 error ("Response phase error. Got 0x%x, expected 0x%x", packet[0], cmd);
1171 *lenp = packet_ptr - packet - 1; /* Subtract checksum byte */
1176 /* Execute a simple (one-byte) command. Returns a pointer to the data
1177 following the error code. */
1179 static unsigned char *
1180 ocd_do_command (cmd, statusp, lenp)
1185 unsigned char buf[100], *p;
1186 int status, error_code;
1189 unsigned char logbuf[100];
1193 ocd_put_packet (buf, 1); /* Send command */
1194 p = ocd_get_packet (*buf, lenp, remote_timeout);
1197 error ("Truncated response packet from OCD device");
1202 if (error_code != 0)
1204 sprintf (errbuf, "ocd_do_command (0x%x):", cmd);
1205 ocd_error (errbuf, error_code);
1208 if (status & OCD_FLAG_PWF)
1209 error ("OCD device can't detect VCC at BDM interface.");
1210 else if (status & OCD_FLAG_CABLE_DISC)
1211 error ("BDM cable appears to be disconnected.");
1215 logbuf[0] = OCD_LOG_FILE;
1216 logbuf[1] = 3; /* close existing WIGGLERS.LOG */
1217 ocd_put_packet (logbuf, 2);
1218 ocd_get_packet (logbuf[0], &logpktlen, remote_timeout);
1220 logbuf[0] = OCD_LOG_FILE;
1221 logbuf[1] = 2; /* append to existing WIGGLERS.LOG */
1222 ocd_put_packet (logbuf, 2);
1223 ocd_get_packet (logbuf[0], &logpktlen, remote_timeout);
1231 /* For some mysterious reason, wait_for_inferior calls kill instead of
1232 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
1236 target_mourn_inferior ();
1240 /* Don't wait for it to die. I'm not really sure it matters whether
1242 target_mourn_inferior ();
1248 unpush_target (current_ops);
1249 generic_mourn_inferior ();
1252 /* All we actually do is set the PC to the start address of exec_bfd, and start
1253 the program at that point. */
1256 ocd_create_inferior (exec_file, args, env)
1261 if (args && (*args != '\000'))
1262 error ("Args are not supported by BDM.");
1264 clear_proceed_status ();
1265 proceed (bfd_get_start_address (exec_bfd), TARGET_SIGNAL_0, 0);
1269 ocd_load (args, from_tty)
1273 generic_load (args, from_tty);
1277 /* This is necessary because many things were based on the PC at the time that
1278 we attached to the monitor, which is no longer valid now that we have loaded
1279 new code (and just changed the PC). Another way to do this might be to call
1280 normal_stop, except that the stack may not be valid, and things would get
1281 horribly confused... */
1283 clear_symtab_users ();
1286 /* This should be defined for each target */
1287 /* But we want to be able to compile this file for some configurations
1288 not yet supported fully */
1290 #define BDM_BREAKPOINT {0x0,0x0,0x0,0x0} /* For ppc 8xx */
1291 /* #define BDM_BREAKPOINT {0x4a,0xfa} /* BGND insn used for CPU32 */
1293 /* BDM (at least on CPU32) uses a different breakpoint */
1296 ocd_insert_breakpoint (addr, contents_cache)
1298 char *contents_cache;
1300 static char break_insn[] = BDM_BREAKPOINT;
1303 val = target_read_memory (addr, contents_cache, sizeof (break_insn));
1306 val = target_write_memory (addr, break_insn, sizeof (break_insn));
1312 ocd_remove_breakpoint (addr, contents_cache)
1314 char *contents_cache;
1316 static char break_insn[] = BDM_BREAKPOINT;
1319 val = target_write_memory (addr, contents_cache, sizeof (break_insn));
1325 bdm_command (args, from_tty)
1329 error ("bdm command must be followed by `reset'");
1333 bdm_reset_command (args, from_tty)
1340 error ("Not connected to OCD device.");
1342 ocd_do_command (OCD_RESET, &status, &pktlen);
1343 dcache_flush (ocd_dcache);
1344 registers_changed ();
1348 bdm_restart_command (args, from_tty)
1355 error ("Not connected to OCD device.");
1357 ocd_do_command (OCD_RESET_RUN, &status, &pktlen);
1358 last_run_status = status;
1359 clear_proceed_status ();
1360 wait_for_inferior ();
1364 /* Temporary replacement for target_store_registers(). This prevents
1365 generic_load from trying to set the PC. */
1368 noop_store_registers (regno)
1374 bdm_update_flash_command (args, from_tty)
1379 struct cleanup *old_chain;
1380 void (*store_registers_tmp) PARAMS ((int));
1383 error ("Not connected to OCD device.");
1386 error ("Must specify file containing new OCD code.");
1388 /* old_chain = make_cleanup (flash_cleanup, 0);*/
1390 ocd_do_command (OCD_ENTER_MON, &status, &pktlen);
1392 ocd_do_command (OCD_ERASE_FLASH, &status, &pktlen);
1394 write_mem_command = OCD_PROGRAM_FLASH;
1395 store_registers_tmp = current_target.to_store_registers;
1396 current_target.to_store_registers = noop_store_registers;
1398 generic_load (args, from_tty);
1400 current_target.to_store_registers = store_registers_tmp;
1401 write_mem_command = OCD_WRITE_MEM;
1403 ocd_do_command (OCD_EXIT_MON, &status, &pktlen);
1405 /* discard_cleanups (old_chain);*/
1409 bdm_read_register_command (args, from_tty)
1413 /* XXX repeat should go on to the next register */
1416 error ("Not connected to OCD device.");
1419 error ("Must specify BDM register number.");
1424 _initialize_remote_ocd ()
1426 extern struct cmd_list_element *cmdlist;
1427 static struct cmd_list_element *ocd_cmd_list = NULL;
1429 add_show_from_set (add_set_cmd ("remotetimeout", no_class,
1430 var_integer, (char *)&remote_timeout,
1431 "Set timeout value for remote read.\n", &setlist),
1434 add_prefix_cmd ("ocd", class_obscure, bdm_command, "", &ocd_cmd_list, "ocd ",
1437 add_cmd ("reset", class_obscure, bdm_reset_command, "", &ocd_cmd_list);
1438 add_cmd ("restart", class_obscure, bdm_restart_command, "", &ocd_cmd_list);
1439 add_cmd ("update-flash", class_obscure, bdm_update_flash_command, "", &ocd_cmd_list);
1440 /* add_cmd ("read-register", class_obscure, bdm_read_register_command, "", &ocd_cmd_list);*/