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Diffstat (limited to 'gdb/ocd.c')
| -rw-r--r-- | gdb/ocd.c | 1444 |
1 files changed, 0 insertions, 1444 deletions
diff --git a/gdb/ocd.c b/gdb/ocd.c deleted file mode 100644 index 343fa62..0000000 --- a/gdb/ocd.c +++ /dev/null @@ -1,1444 +0,0 @@ -/* Target communications support for Macraigor Systems' On-Chip Debugging - Copyright 1996, 1997 Free Software Foundation, Inc. - -This file is part of GDB. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "gdbcore.h" -#include "gdb_string.h" -#include <fcntl.h> -#include "frame.h" -#include "inferior.h" -#include "bfd.h" -#include "symfile.h" -#include "target.h" -#include "wait.h" -#include "gdbcmd.h" -#include "objfiles.h" -#include "gdb-stabs.h" -#include "dcache.h" -#include <sys/types.h> -#include <signal.h> -#include "serial.h" -#include "ocd.h" - -/* Prototypes for local functions */ - -static int ocd_read_bytes PARAMS ((CORE_ADDR memaddr, - char *myaddr, int len)); - -static int ocd_start_remote PARAMS ((PTR dummy)); - -static int readchar PARAMS ((int timeout)); - -static void reset_packet PARAMS ((void)); - -static void output_packet PARAMS ((void)); - -static int get_quoted_char PARAMS ((int timeout)); - -static void put_quoted_char PARAMS ((int c)); - -static void ocd_interrupt PARAMS ((int signo)); - -static void ocd_interrupt_twice PARAMS ((int signo)); - -static void interrupt_query PARAMS ((void)); - -static unsigned char * ocd_do_command PARAMS ((int cmd, int *statusp, int *lenp)); - -static void ocd_put_packet PARAMS ((unsigned char *packet, int pktlen)); - -static unsigned char * ocd_get_packet PARAMS ((int cmd, int *pktlen, int timeout)); - -static struct target_ops *current_ops = NULL; - -static int last_run_status; - -/* This was 5 seconds, which is a long time to sit and wait. - Unless this is going though some terminal server or multiplexer or - other form of hairy serial connection, I would think 2 seconds would - be plenty. */ - -#if 0 -/* FIXME: Change to allow option to set timeout value on a per target - basis. */ -static int remote_timeout = 2; -#endif - -/* Descriptor for I/O to remote machine. Initialize it to NULL so that - ocd_open knows that we don't have a file open when the program - starts. */ -static serial_t ocd_desc = NULL; - -void -ocd_error (s, error_code) - char *s; - int error_code; -{ - char buf[100]; - - fputs_filtered (s, gdb_stderr); - fputs_filtered (" ", gdb_stderr); - - switch (error_code) - { - case 0x1: s = "Unknown fault"; break; - case 0x2: s = "Power failed"; break; - case 0x3: s = "Cable disconnected"; break; - case 0x4: s = "Couldn't enter OCD mode"; break; - case 0x5: s = "Target stuck in reset"; break; - case 0x6: s = "OCD hasn't been initialized"; break; - case 0x7: s = "Write verify failed"; break; - case 0x8: s = "Reg buff error (during MPC5xx fp reg read/write)"; break; - case 0x9: s = "Invalid CPU register access attempt failed"; break; - case 0x11: s = "Bus error"; break; - case 0x12: s = "Checksum error"; break; - case 0x13: s = "Illegal command"; break; - case 0x14: s = "Parameter error"; break; - case 0x15: s = "Internal error"; break; - case 0x80: s = "Flash erase error"; break; - default: - sprintf (buf, "Unknown error code %d", error_code); - s = buf; - } - - error (s); -} - -/* Return nonzero if the thread TH is still alive on the remote system. */ - -int -ocd_thread_alive (th) - int th; -{ - return 1; -} - -/* Clean up connection to a remote debugger. */ - -/* ARGSUSED */ -void -ocd_close (quitting) - int quitting; -{ - if (ocd_desc) - SERIAL_CLOSE (ocd_desc); - ocd_desc = NULL; -} - -/* Stub for catch_errors. */ - -static int -ocd_start_remote (dummy) - PTR dummy; -{ - unsigned char buf[10], *p; - int pktlen; - int status; - int error_code; - int speed; - enum ocd_target_type target_type; - - target_type = *(enum ocd_target_type*)dummy; - - immediate_quit = 1; /* Allow user to interrupt it */ - - SERIAL_SEND_BREAK (ocd_desc); /* Wake up the wiggler */ - - speed = 80; /* Divide clock by 4000 */ - - buf[0] = OCD_INIT; - buf[1] = speed >> 8; - buf[2] = speed & 0xff; - buf[3] = target_type; - ocd_put_packet (buf, 4); /* Init OCD params */ - p = ocd_get_packet (buf[0], &pktlen, remote_timeout); - - if (pktlen < 2) - error ("Truncated response packet from OCD device"); - - status = p[1]; - error_code = p[2]; - - if (error_code != 0) - ocd_error ("OCD_INIT:", error_code); - - ocd_do_command (OCD_AYT, &status, &pktlen); - - p = ocd_do_command (OCD_GET_VERSION, &status, &pktlen); - - printf_unfiltered ("[Wiggler version %x.%x, capability 0x%x]\n", - p[0], p[1], (p[2] << 16) | p[3]); - -#if 0 - /* Reset the target */ - - ocd_do_command (OCD_RESET_RUN, &status, &pktlen); -/* ocd_do_command (OCD_RESET, &status, &pktlen);*/ -#endif - - /* If processor is still running, stop it. */ - - if (!(status & OCD_FLAG_BDM)) - ocd_stop (); - -#if 1 - /* When using a target box, we want to asynchronously return status when - target stops. The OCD_SET_CTL_FLAGS command is ignored by Wigglers.dll - when using a parallel Wiggler */ - buf[0] = OCD_SET_CTL_FLAGS; - buf[1] = 0; - buf[2] = 1; - ocd_put_packet (buf, 3); - - p = ocd_get_packet (buf[0], &pktlen, remote_timeout); - - if (pktlen < 2) - error ("Truncated response packet from OCD device"); - - status = p[1]; - error_code = p[2]; - - if (error_code != 0) - ocd_error ("OCD_SET_CTL_FLAGS:", error_code); -#endif - - immediate_quit = 0; - -/* This is really the job of start_remote however, that makes an assumption - that the target is about to print out a status message of some sort. That - doesn't happen here (in fact, it may not be possible to get the monitor to - send the appropriate packet). */ - - flush_cached_frames (); - registers_changed (); - stop_pc = read_pc (); - set_current_frame (create_new_frame (read_fp (), stop_pc)); - select_frame (get_current_frame (), 0); - print_stack_frame (selected_frame, -1, 1); - - buf[0] = OCD_LOG_FILE; - buf[1] = 3; /* close existing WIGGLERS.LOG */ - ocd_put_packet (buf, 2); - p = ocd_get_packet (buf[0], &pktlen, remote_timeout); - - buf[0] = OCD_LOG_FILE; - buf[1] = 2; /* append to existing WIGGLERS.LOG */ - ocd_put_packet (buf, 2); - p = ocd_get_packet (buf[0], &pktlen, remote_timeout); - - return 1; -} - -/* Open a connection to a remote debugger. - NAME is the filename used for communication. */ - -static DCACHE *ocd_dcache; - -void -ocd_open (name, from_tty, target_type, ops) - char *name; - int from_tty; - enum ocd_target_type target_type; - struct target_ops *ops; -{ - unsigned char buf[10], *p; - int status; - int pktlen; - - if (name == 0) - error ("To open an OCD connection, you need to specify the\n\ -device the OCD device is attached to (e.g. /dev/ttya)."); - - target_preopen (from_tty); - - current_ops = ops; - - unpush_target (current_ops); - - ocd_dcache = dcache_init (ocd_read_bytes, ocd_write_bytes); - - if (strncmp(name,"wiggler",7) == 0) - { - ocd_desc = SERIAL_OPEN ("ocd"); - if (!ocd_desc) - perror_with_name (name); - - buf[0] = OCD_LOG_FILE; - buf[1] = 1; /* open new or overwrite existing WIGGLERS.LOG */ - ocd_put_packet (buf, 2); - p = ocd_get_packet (buf[0], &pktlen, remote_timeout); - - buf[0] = OCD_SET_CONNECTION; - buf[1] = 0x01; /* atoi (name[11]); */ - ocd_put_packet (buf, 2); - p = ocd_get_packet (buf[0], &pktlen, remote_timeout); - } - else /* not using Wigglers.dll */ - { - ocd_desc = SERIAL_OPEN (name); - if (!ocd_desc) - perror_with_name (name); - } - - if (baud_rate != -1) - { - if (SERIAL_SETBAUDRATE (ocd_desc, baud_rate)) - { - SERIAL_CLOSE (ocd_desc); - perror_with_name (name); - } - } - - SERIAL_RAW (ocd_desc); - - /* If there is something sitting in the buffer we might take it as a - response to a command, which would be bad. */ - SERIAL_FLUSH_INPUT (ocd_desc); - - if (from_tty) - { - puts_filtered ("Remote target wiggler connected to "); - puts_filtered (name); - puts_filtered ("\n"); - } - push_target (current_ops); /* Switch to using remote target now */ - - /* Without this, some commands which require an active target (such as kill) - won't work. This variable serves (at least) double duty as both the pid - of the target process (if it has such), and as a flag indicating that a - target is active. These functions should be split out into seperate - variables, especially since GDB will someday have a notion of debugging - several processes. */ - - inferior_pid = 42000; - /* Start the remote connection; if error (0), discard this target. - In particular, if the user quits, be sure to discard it - (we'd be in an inconsistent state otherwise). */ - if (!catch_errors (ocd_start_remote, &target_type, - "Couldn't establish connection to remote target\n", - RETURN_MASK_ALL)) - { - pop_target(); - error ("Failed to connect to OCD."); - } -} - -/* This takes a program previously attached to and detaches it. After - this is done, GDB can be used to debug some other program. We - better not have left any breakpoints in the target program or it'll - die when it hits one. */ - -void -ocd_detach (args, from_tty) - char *args; - int from_tty; -{ - if (args) - error ("Argument given to \"detach\" when remotely debugging."); - - pop_target (); - if (from_tty) - puts_filtered ("Ending remote debugging.\n"); -} - -/* Tell the remote machine to resume. */ - -void -ocd_resume (pid, step, siggnal) - int pid, step; - enum target_signal siggnal; -{ - int pktlen; - - dcache_flush (ocd_dcache); - - if (step) - ocd_do_command (OCD_STEP, &last_run_status, &pktlen); - else - ocd_do_command (OCD_RUN, &last_run_status, &pktlen); -} - -void -ocd_stop () -{ - int status; - int pktlen; - - ocd_do_command (OCD_STOP, &status, &pktlen); - - if (!(status & OCD_FLAG_BDM)) - error ("Can't stop target via BDM"); -} - -static volatile int ocd_interrupt_flag; - -/* Send ^C to target to halt it. Target will respond, and send us a - packet. */ - -static void -ocd_interrupt (signo) - int signo; -{ - /* If this doesn't work, try more severe steps. */ - signal (signo, ocd_interrupt_twice); - - if (remote_debug) - printf_unfiltered ("ocd_interrupt called\n"); - - { - char buf[1]; - - ocd_stop (); - buf[0] = OCD_AYT; - ocd_put_packet (buf, 1); - ocd_interrupt_flag = 1; - } -} - -static void (*ofunc)(); - -/* The user typed ^C twice. */ -static void -ocd_interrupt_twice (signo) - int signo; -{ - signal (signo, ofunc); - - interrupt_query (); - - signal (signo, ocd_interrupt); -} - -/* Ask the user what to do when an interrupt is received. */ - -static void -interrupt_query () -{ - target_terminal_ours (); - - if (query ("Interrupted while waiting for the program.\n\ -Give up (and stop debugging it)? ")) - { - target_mourn_inferior (); - return_to_top_level (RETURN_QUIT); - } - - target_terminal_inferior (); -} - -/* If nonzero, ignore the next kill. */ -static int kill_kludge; - -/* Wait until the remote machine stops, then return, - storing status in STATUS just as `wait' would. - Returns "pid" (though it's not clear what, if anything, that - means in the case of this target). */ - -int -ocd_wait () -{ - unsigned char *p; - int error_code; - int pktlen; - char buf[1]; - - ocd_interrupt_flag = 0; - - /* Target might already be stopped by the time we get here. */ - /* If we aren't already stopped, we need to loop until we've dropped - back into BDM mode */ - - while (!(last_run_status & OCD_FLAG_BDM)) - { - buf[0] = OCD_AYT; - ocd_put_packet (buf, 1); - p = ocd_get_packet (OCD_AYT, &pktlen, -1); - - ofunc = (void (*)()) signal (SIGINT, ocd_interrupt); - signal (SIGINT, ofunc); - - if (pktlen < 2) - error ("Truncated response packet from OCD device"); - - last_run_status = p[1]; - error_code = p[2]; - - if (error_code != 0) - ocd_error ("target_wait:", error_code); - - if (last_run_status & OCD_FLAG_PWF) - error ("OCD device lost VCC at BDM interface."); - else if (last_run_status & OCD_FLAG_CABLE_DISC) - error ("OCD device cable appears to have been disconnected."); - } - - if (ocd_interrupt_flag) - return 1; - else - return 0; -} - -/* Read registers from the OCD device. Specify the starting and ending - register number. Return the number of regs actually read in *NUMREGS. - Returns a pointer to a static array containing the register contents. */ - -unsigned char * -ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, reglen) - int first_bdm_regno; - int last_bdm_regno; - int *reglen; -{ - unsigned char buf[10]; - int i; - unsigned char *p; - unsigned char *regs; - int error_code, status; - int pktlen; - - buf[0] = OCD_READ_REGS; - buf[1] = first_bdm_regno >> 8; - buf[2] = first_bdm_regno & 0xff; - buf[3] = last_bdm_regno >> 8; - buf[4] = last_bdm_regno & 0xff; - - ocd_put_packet (buf, 5); - p = ocd_get_packet (OCD_READ_REGS, &pktlen, remote_timeout); - - status = p[1]; - error_code = p[2]; - - if (error_code != 0) - ocd_error ("read_bdm_registers:", error_code); - - i = p[3]; - if (i == 0) - i = 256; - - if (i > pktlen - 4 - || ((i & 3) != 0)) - error ("Register block size bad: %d", i); - - *reglen = i; - - regs = p + 4; - - return regs; -} - -/* Read register BDM_REGNO and returns its value ala read_register() */ - -CORE_ADDR -ocd_read_bdm_register (bdm_regno) - int bdm_regno; -{ - int reglen; - unsigned char *p; - CORE_ADDR regval; - - p = ocd_read_bdm_registers (bdm_regno, bdm_regno, ®len); - regval = extract_unsigned_integer (p, reglen); - - return regval; -} - -void -ocd_write_bdm_registers (first_bdm_regno, regptr, reglen) - int first_bdm_regno; - unsigned char *regptr; - int reglen; -{ - unsigned char *buf; - unsigned char *p; - int error_code, status; - int pktlen; - - buf = alloca (4 + reglen); - - buf[0] = OCD_WRITE_REGS; - buf[1] = first_bdm_regno >> 8; - buf[2] = first_bdm_regno & 0xff; - buf[3] = reglen; - memcpy (buf + 4, regptr, reglen); - - ocd_put_packet (buf, 4 + reglen); - p = ocd_get_packet (OCD_WRITE_REGS, &pktlen, remote_timeout); - - if (pktlen < 3) - error ("Truncated response packet from OCD device"); - - status = p[1]; - error_code = p[2]; - - if (error_code != 0) - ocd_error ("ocd_write_bdm_registers:", error_code); -} - -void -ocd_write_bdm_register (bdm_regno, reg) - int bdm_regno; - CORE_ADDR reg; -{ - unsigned char buf[4]; - - store_unsigned_integer (buf, 4, reg); - - ocd_write_bdm_registers (bdm_regno, buf, 4); -} - -void -ocd_prepare_to_store () -{ -} - -/* Write memory data directly to the remote machine. - This does not inform the data cache; the data cache uses this. - MEMADDR is the address in the remote memory space. - MYADDR is the address of the buffer in our space. - LEN is the number of bytes. - - Returns number of bytes transferred, or 0 for error. */ - -static int write_mem_command = OCD_WRITE_MEM; - -int -ocd_write_bytes (memaddr, myaddr, len) - CORE_ADDR memaddr; - char *myaddr; - int len; -{ - char buf[256 + 10]; - unsigned char *p; - int origlen; - - origlen = len; - - buf[0] = write_mem_command; - buf[5] = 1; /* Write as bytes */ - buf[6] = 0; /* Don't verify */ - - while (len > 0) - { - int numbytes; - int pktlen; - int status, error_code; - - numbytes = min (len, 256 - 8); - - buf[1] = memaddr >> 24; - buf[2] = memaddr >> 16; - buf[3] = memaddr >> 8; - buf[4] = memaddr; - - buf[7] = numbytes; - - memcpy (&buf[8], myaddr, numbytes); - ocd_put_packet (buf, 8 + numbytes); - p = ocd_get_packet (OCD_WRITE_MEM, &pktlen, remote_timeout); - if (pktlen < 3) - error ("Truncated response packet from OCD device"); - - status = p[1]; - error_code = p[2]; - - if (error_code == 0x11) /* Got a bus error? */ - { - CORE_ADDR error_address; - - error_address = p[3] << 24; - error_address |= p[4] << 16; - error_address |= p[5] << 8; - error_address |= p[6]; - numbytes = error_address - memaddr; - - len -= numbytes; - - errno = EIO; - - break; - } - else if (error_code != 0) - ocd_error ("ocd_write_bytes:", error_code); - - len -= numbytes; - memaddr += numbytes; - myaddr += numbytes; - } - - return origlen - len; -} - -/* Read memory data directly from the remote machine. - This does not use the data cache; the data cache uses this. - MEMADDR is the address in the remote memory space. - MYADDR is the address of the buffer in our space. - LEN is the number of bytes. - - Returns number of bytes transferred, or 0 for error. */ - -static int -ocd_read_bytes (memaddr, myaddr, len) - CORE_ADDR memaddr; - char *myaddr; - int len; -{ - char buf[256 + 10]; - unsigned char *p; - int origlen; - - origlen = len; - - buf[0] = OCD_READ_MEM; - buf[5] = 1; /* Read as bytes */ - - while (len > 0) - { - int numbytes; - int pktlen; - int status, error_code; - - numbytes = min (len, 256 - 7); - - buf[1] = memaddr >> 24; - buf[2] = memaddr >> 16; - buf[3] = memaddr >> 8; - buf[4] = memaddr; - - buf[6] = numbytes; - - ocd_put_packet (buf, 7); - p = ocd_get_packet (OCD_READ_MEM, &pktlen, remote_timeout); - if (pktlen < 4) - error ("Truncated response packet from OCD device"); - - status = p[1]; - error_code = p[2]; - - if (error_code == 0x11) /* Got a bus error? */ - { - CORE_ADDR error_address; - - error_address = p[3] << 24; - error_address |= p[4] << 16; - error_address |= p[5] << 8; - error_address |= p[6]; - numbytes = error_address - memaddr; - - len -= numbytes; - - errno = EIO; - - break; - } - else if (error_code != 0) - ocd_error ("ocd_read_bytes:", error_code); - - memcpy (myaddr, &p[4], numbytes); - - len -= numbytes; - memaddr += numbytes; - myaddr += numbytes; - } - - return origlen - len; -} - -/* Read or write LEN bytes from inferior memory at MEMADDR, transferring - to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is - nonzero. Returns length of data written or read; 0 for error. */ - -/* ARGSUSED */ -int -ocd_xfer_memory (memaddr, myaddr, len, should_write, target) - CORE_ADDR memaddr; - char *myaddr; - int len; - int should_write; - struct target_ops *target; /* ignored */ -{ - return dcache_xfer_memory (ocd_dcache, memaddr, myaddr, len, should_write); -} - -void -ocd_files_info (ignore) - struct target_ops *ignore; -{ - puts_filtered ("Debugging a target over a serial line.\n"); -} - -/* Stuff for dealing with the packets which are part of this protocol. - See comment at top of file for details. */ - -/* Read a single character from the remote side, handling wierd errors. */ - -static int -readchar (timeout) - int timeout; -{ - int ch; - - ch = SERIAL_READCHAR (ocd_desc, timeout); - - switch (ch) - { - case SERIAL_EOF: - error ("Remote connection closed"); - case SERIAL_ERROR: - perror_with_name ("Remote communication error"); - case SERIAL_TIMEOUT: - default: - return ch; - } -} - -#if 0 -/* Read a character from the data stream, dequoting as necessary. SYN is - treated special. Any SYNs appearing in the data stream are returned as the - distinct value RAW_SYN (which has a value > 8 bits and therefore cannot be - mistaken for real data). */ - -static int -get_quoted_char (timeout) - int timeout; -{ - int ch; - - ch = readchar (timeout); - - switch (ch) - { - case SERIAL_TIMEOUT: - error ("Timeout in mid-packet, aborting"); - case SYN: - return RAW_SYN; - case DLE: - ch = readchar (timeout); - if (ch == SYN) - return RAW_SYN; - return ch & ~0100; - default: - return ch; - } -} - -static unsigned char pkt[256 * 2 + 10], *pktp; /* Worst case */ - -static void -reset_packet () -{ - pktp = pkt; -} - -static void -output_packet () -{ - if (SERIAL_WRITE (ocd_desc, pkt, pktp - pkt)) - perror_with_name ("output_packet: write failed"); - - reset_packet (); -} - -/* Output a quoted character. SYNs and DLEs are quoted. Everything else goes - through untouched. */ - -static void -put_quoted_char (c) - int c; -{ - switch (c) - { - case SYN: - case DLE: - *pktp++ = DLE; - c |= 0100; - } - - *pktp++ = c; -} - -/* Send a packet to the OCD device. The packet framed by a SYN character, - a byte count and a checksum. The byte count only counts the number of - bytes between the count and the checksum. A count of zero actually - means 256. Any SYNs within the packet (including the checksum and - count) must be quoted. The quote character must be quoted as well. - Quoting is done by replacing the character with the two-character sequence - DLE, {char} | 0100. Note that the quoting mechanism has no effect on the - byte count. */ - -static void -stu_put_packet (buf, len) - unsigned char *buf; - int len; -{ - unsigned char checksum; - unsigned char c; - - if (len == 0 || len > 256) - abort (); /* Can't represent 0 length packet */ - - reset_packet (); - - checksum = 0; - - put_quoted_char (RAW_SYN); - - c = len; - - do - { - checksum += c; - - put_quoted_char (c); - - c = *buf++; - } - while (len-- > 0); - - put_quoted_char (-checksum & 0xff); - - output_packet (); -} - -#else - -/* Send a packet to the OCD device. The packet framed by a SYN character, - a byte count and a checksum. The byte count only counts the number of - bytes between the count and the checksum. A count of zero actually - means 256. Any SYNs within the packet (including the checksum and - count) must be quoted. The quote character must be quoted as well. - Quoting is done by replacing the character with the two-character sequence - DLE, {char} | 0100. Note that the quoting mechanism has no effect on the - byte count. */ - -static void -ocd_put_packet (buf, len) - unsigned char *buf; - int len; -{ - unsigned char checksum; - unsigned char c; - unsigned char *packet, *packet_ptr; - - packet = alloca (len + 1 + 1); /* packet + SYN + checksum */ - packet_ptr = packet; - - checksum = 0; - - *packet_ptr++ = 0x55; - - while (len-- > 0) - { - c = *buf++; - - checksum += c; - *packet_ptr++ = c; - } - - *packet_ptr++ = -checksum; - if (SERIAL_WRITE (ocd_desc, packet, packet_ptr - packet)) - perror_with_name ("output_packet: write failed"); -} -#endif - -#if 0 -/* Get a packet from the OCD device. Timeout is only enforced for the - first byte of the packet. Subsequent bytes are expected to arrive in - time <= remote_timeout. Returns a pointer to a static buffer containing - the payload of the packet. *LENP contains the length of the packet. -*/ - -static unsigned char * -stu_get_packet (cmd, lenp, timeout) - unsigned char cmd; - int *lenp; -{ - int ch; - int len; - static unsigned char buf[256 + 10], *p; - unsigned char checksum; - - find_packet: - - ch = get_quoted_char (timeout); - - if (ch < 0) - error ("get_packet (readchar): %d", ch); - - if (ch != RAW_SYN) - goto find_packet; - - found_syn: /* Found the start of a packet */ - - p = buf; - checksum = 0; - - len = get_quoted_char (remote_timeout); - - if (len == RAW_SYN) - goto found_syn; - - checksum += len; - - if (len == 0) - len = 256; - - len++; /* Include checksum */ - - while (len-- > 0) - { - ch = get_quoted_char (remote_timeout); - if (ch == RAW_SYN) - goto found_syn; - - *p++ = ch; - checksum += ch; - } - - if (checksum != 0) - goto find_packet; - - if (cmd != buf[0]) - error ("Response phase error. Got 0x%x, expected 0x%x", buf[0], cmd); - - *lenp = p - buf - 1; - return buf; -} - -#else - -/* Get a packet from the OCD device. Timeout is only enforced for the - first byte of the packet. Subsequent bytes are expected to arrive in - time <= remote_timeout. Returns a pointer to a static buffer containing - the payload of the packet. *LENP contains the length of the packet. -*/ - -static unsigned char * -ocd_get_packet (cmd, lenp, timeout) - int cmd; - int *lenp; -{ - int ch; - int len; - int i; - static unsigned char packet[512]; - unsigned char *packet_ptr; - unsigned char checksum; - - ch = readchar (timeout); - - if (ch < 0) - error ("ocd_get_packet (readchar): %d", ch); - - if (ch != 0x55) - error ("ocd_get_packet (readchar): %d", ch); - -/* Found the start of a packet */ - - packet_ptr = packet; - checksum = 0; - -/* Read command char. That sort of tells us how long the packet is. */ - - ch = readchar (timeout); - - if (ch < 0) - error ("ocd_get_packet (readchar): %d", ch); - - *packet_ptr++ = ch; - checksum += ch; - -/* Get status. */ - - ch = readchar (timeout); - - if (ch < 0) - error ("ocd_get_packet (readchar): %d", ch); - *packet_ptr++ = ch; - checksum += ch; - -/* Get error code. */ - - ch = readchar (timeout); - - if (ch < 0) - error ("ocd_get_packet (readchar): %d", ch); - *packet_ptr++ = ch; - checksum += ch; - - switch (ch) /* Figure out length of packet */ - { - case 0x7: /* Write verify error? */ - len = 8; /* write address, value read back */ - break; - case 0x11: /* Bus error? */ - /* write address, read flag */ - case 0x15: /* Internal error */ - len = 5; /* error code, vector */ - break; - default: /* Error w/no params */ - len = 0; - break; - case 0x0: /* Normal result */ - switch (packet[0]) - { - case OCD_AYT: /* Are You There? */ - case OCD_SET_BAUD_RATE: /* Set Baud Rate */ - case OCD_INIT: /* Initialize OCD device */ - case OCD_SET_SPEED: /* Set Speed */ - case OCD_SET_FUNC_CODE: /* Set Function Code */ - case OCD_SET_CTL_FLAGS: /* Set Control Flags */ - case OCD_SET_BUF_ADDR: /* Set Register Buffer Address */ - case OCD_RUN: /* Run Target from PC */ - case OCD_RUN_ADDR: /* Run Target from Specified Address */ - case OCD_STOP: /* Stop Target */ - case OCD_RESET_RUN: /* Reset Target and Run */ - case OCD_RESET: /* Reset Target and Halt */ - case OCD_STEP: /* Single Step */ - case OCD_WRITE_REGS: /* Write Register */ - case OCD_WRITE_MEM: /* Write Memory */ - case OCD_FILL_MEM: /* Fill Memory */ - case OCD_MOVE_MEM: /* Move Memory */ - case OCD_WRITE_INT_MEM: /* Write Internal Memory */ - case OCD_JUMP: /* Jump to Subroutine */ - case OCD_ERASE_FLASH: /* Erase flash memory */ - case OCD_PROGRAM_FLASH: /* Write flash memory */ - case OCD_EXIT_MON: /* Exit the flash programming monitor */ - case OCD_ENTER_MON: /* Enter the flash programming monitor */ - case OCD_LOG_FILE: /* Make Wigglers.dll save Wigglers.log */ - case OCD_SET_CONNECTION: /* Set type of connection in Wigglers.dll */ - len = 0; - break; - case OCD_GET_VERSION: /* Get Version */ - len = 10; - break; - case OCD_GET_STATUS_MASK: /* Get Status Mask */ - len = 1; - break; - case OCD_GET_CTRS: /* Get Error Counters */ - case OCD_READ_REGS: /* Read Register */ - case OCD_READ_MEM: /* Read Memory */ - case OCD_READ_INT_MEM: /* Read Internal Memory */ - len = 257; - break; - default: - error ("ocd_get_packet: unknown packet type 0x%x\n", ch); - } - } - - if (len == 257) /* Byte stream? */ - { /* Yes, byte streams contain the length */ - ch = readchar (timeout); - - if (ch < 0) - error ("ocd_get_packet (readchar): %d", ch); - *packet_ptr++ = ch; - checksum += ch; - len = ch; - if (len == 0) - len = 256; - } - - while (len-- >= 0) /* Do rest of packet and checksum */ - { - ch = readchar (timeout); - - if (ch < 0) - error ("ocd_get_packet (readchar): %d", ch); - *packet_ptr++ = ch; - checksum += ch; - } - - if (checksum != 0) - error ("ocd_get_packet: bad packet checksum"); - - if (cmd != -1 && cmd != packet[0]) - error ("Response phase error. Got 0x%x, expected 0x%x", packet[0], cmd); - - *lenp = packet_ptr - packet - 1; /* Subtract checksum byte */ - return packet; -} -#endif - -/* Execute a simple (one-byte) command. Returns a pointer to the data - following the error code. */ - -static unsigned char * -ocd_do_command (cmd, statusp, lenp) - int cmd; - int *statusp; - int *lenp; -{ - unsigned char buf[100], *p; - int status, error_code; - char errbuf[100]; - - unsigned char logbuf[100]; - int logpktlen; - - buf[0] = cmd; - ocd_put_packet (buf, 1); /* Send command */ - p = ocd_get_packet (*buf, lenp, remote_timeout); - - if (*lenp < 3) - error ("Truncated response packet from OCD device"); - - status = p[1]; - error_code = p[2]; - - if (error_code != 0) - { - sprintf (errbuf, "ocd_do_command (0x%x):", cmd); - ocd_error (errbuf, error_code); - } - - if (status & OCD_FLAG_PWF) - error ("OCD device can't detect VCC at BDM interface."); - else if (status & OCD_FLAG_CABLE_DISC) - error ("BDM cable appears to be disconnected."); - - *statusp = status; - - logbuf[0] = OCD_LOG_FILE; - logbuf[1] = 3; /* close existing WIGGLERS.LOG */ - ocd_put_packet (logbuf, 2); - ocd_get_packet (logbuf[0], &logpktlen, remote_timeout); - - logbuf[0] = OCD_LOG_FILE; - logbuf[1] = 2; /* append to existing WIGGLERS.LOG */ - ocd_put_packet (logbuf, 2); - ocd_get_packet (logbuf[0], &logpktlen, remote_timeout); - - return p + 3; -} - -void -ocd_kill () -{ - /* For some mysterious reason, wait_for_inferior calls kill instead of - mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ - if (kill_kludge) - { - kill_kludge = 0; - target_mourn_inferior (); - return; - } - - /* Don't wait for it to die. I'm not really sure it matters whether - we do or not. */ - target_mourn_inferior (); -} - -void -ocd_mourn () -{ - unpush_target (current_ops); - generic_mourn_inferior (); -} - -/* All we actually do is set the PC to the start address of exec_bfd, and start - the program at that point. */ - -void -ocd_create_inferior (exec_file, args, env) - char *exec_file; - char *args; - char **env; -{ - if (args && (*args != '\000')) - error ("Args are not supported by BDM."); - - clear_proceed_status (); - proceed (bfd_get_start_address (exec_bfd), TARGET_SIGNAL_0, 0); -} - -void -ocd_load (args, from_tty) - char *args; - int from_tty; -{ - generic_load (args, from_tty); - - inferior_pid = 0; - -/* This is necessary because many things were based on the PC at the time that - we attached to the monitor, which is no longer valid now that we have loaded - new code (and just changed the PC). Another way to do this might be to call - normal_stop, except that the stack may not be valid, and things would get - horribly confused... */ - - clear_symtab_users (); -} - -/* This should be defined for each target */ -/* But we want to be able to compile this file for some configurations - not yet supported fully */ - -#define BDM_BREAKPOINT {0x0,0x0,0x0,0x0} /* For ppc 8xx */ -#if 0 -#define BDM_BREAKPOINT {0x4a,0xfa} /* BGND insn used for CPU32 */ -#endif - -/* BDM (at least on CPU32) uses a different breakpoint */ - -int -ocd_insert_breakpoint (addr, contents_cache) - CORE_ADDR addr; - char *contents_cache; -{ - static char break_insn[] = BDM_BREAKPOINT; - int val; - - val = target_read_memory (addr, contents_cache, sizeof (break_insn)); - - if (val == 0) - val = target_write_memory (addr, break_insn, sizeof (break_insn)); - - return val; -} - -int -ocd_remove_breakpoint (addr, contents_cache) - CORE_ADDR addr; - char *contents_cache; -{ - static char break_insn[] = BDM_BREAKPOINT; - int val; - - val = target_write_memory (addr, contents_cache, sizeof (break_insn)); - - return val; -} - -static void -bdm_command (args, from_tty) - char *args; - int from_tty; -{ - error ("bdm command must be followed by `reset'"); -} - -static void -bdm_reset_command (args, from_tty) - char *args; - int from_tty; -{ - int status, pktlen; - - if (!ocd_desc) - error ("Not connected to OCD device."); - - ocd_do_command (OCD_RESET, &status, &pktlen); - dcache_flush (ocd_dcache); - registers_changed (); -} - -static void -bdm_restart_command (args, from_tty) - char *args; - int from_tty; -{ - int status, pktlen; - - if (!ocd_desc) - error ("Not connected to OCD device."); - - ocd_do_command (OCD_RESET_RUN, &status, &pktlen); - last_run_status = status; - clear_proceed_status (); - wait_for_inferior (); - normal_stop (); -} - -/* Temporary replacement for target_store_registers(). This prevents - generic_load from trying to set the PC. */ - -static void -noop_store_registers (regno) - int regno; -{ -} - -static void -bdm_update_flash_command (args, from_tty) - char *args; - int from_tty; -{ - int status, pktlen; - struct cleanup *old_chain; - void (*store_registers_tmp) PARAMS ((int)); - - if (!ocd_desc) - error ("Not connected to OCD device."); - - if (!args) - error ("Must specify file containing new OCD code."); - -/* old_chain = make_cleanup (flash_cleanup, 0);*/ - - ocd_do_command (OCD_ENTER_MON, &status, &pktlen); - - ocd_do_command (OCD_ERASE_FLASH, &status, &pktlen); - - write_mem_command = OCD_PROGRAM_FLASH; - store_registers_tmp = current_target.to_store_registers; - current_target.to_store_registers = noop_store_registers; - - generic_load (args, from_tty); - - current_target.to_store_registers = store_registers_tmp; - write_mem_command = OCD_WRITE_MEM; - - ocd_do_command (OCD_EXIT_MON, &status, &pktlen); - -/* discard_cleanups (old_chain);*/ -} - -static void -bdm_read_register_command (args, from_tty) - char *args; - int from_tty; -{ - /* XXX repeat should go on to the next register */ - - if (!ocd_desc) - error ("Not connected to OCD device."); - - if (!args) - error ("Must specify BDM register number."); - -} - -void -_initialize_remote_ocd () -{ - extern struct cmd_list_element *cmdlist; - static struct cmd_list_element *ocd_cmd_list = NULL; - - add_show_from_set (add_set_cmd ("remotetimeout", no_class, - var_integer, (char *)&remote_timeout, - "Set timeout value for remote read.\n", &setlist), - &showlist); - - add_prefix_cmd ("ocd", class_obscure, bdm_command, "", &ocd_cmd_list, "ocd ", - 0, &cmdlist); - - add_cmd ("reset", class_obscure, bdm_reset_command, "", &ocd_cmd_list); - add_cmd ("restart", class_obscure, bdm_restart_command, "", &ocd_cmd_list); - add_cmd ("update-flash", class_obscure, bdm_update_flash_command, "", &ocd_cmd_list); - /* add_cmd ("read-register", class_obscure, bdm_read_register_command, "", &ocd_cmd_list);*/ -} |