upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/tools/gdb/gdbcont.c

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/*
* (C) Copyright 2000
* Murray Jensen <Murray.Jensen@csiro.au>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "serial.h"
#include "error.h"
#include "remote.h"
char *serialdev = "/dev/term/b";
speed_t speed = B230400;
int verbose = 0;
int
main(int ac, char **av)
{
int c, sfd;
if ((pname = strrchr(av[0], '/')) == NULL)
pname = av[0];
else
pname++;
while ((c = getopt(ac, av, "b:p:v")) != EOF)
switch (c) {
case 'b':
if ((speed = cvtspeed(optarg)) == B0)
Error("can't decode baud rate specified in -b option");
break;
case 'p':
serialdev = optarg;
break;
case 'v':
verbose = 1;
break;
default:
usage:
fprintf(stderr, "Usage: %s [-b bps] [-p dev] [-v]\n", pname);
exit(1);
}
if (optind != ac)
goto usage;
if (verbose)
fprintf(stderr, "Opening serial port and sending continue...\n");
if ((sfd = serialopen(serialdev, speed)) < 0)
Perror("open of serial device '%s' failed", serialdev);
remote_desc = sfd;
remote_reset();
remote_continue();
if (serialclose(sfd) < 0)
Perror("close of serial device '%s' failed", serialdev);
if (verbose)
fprintf(stderr, "Done.\n");
return (0);
}