avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/tools/gdb/gdbsend.c

@@ -0,0 +1,121 @@
+/*
+ * (C) Copyright 2000
+ * Murray Jensen <Murray.Jensen@csiro.au>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "serial.h"
+#include "error.h"
+#include "remote.h"
+
+char *serialdev = "/dev/term/b";
+speed_t speed = B230400;
+int verbose = 0, docont = 0;
+unsigned long addr = 0x10000UL;
+
+int
+main(int ac, char **av)
+{
+    int c, sfd, ifd;
+    char *ifn, *image;
+    struct stat ist;
+
+    if ((pname = strrchr(av[0], '/')) == NULL)
+	pname = av[0];
+    else
+	pname++;
+
+    while ((c = getopt(ac, av, "a:b:cp:v")) != EOF)
+	switch (c) {
+
+	case 'a': {
+	    char *ep;
+
+	    addr = strtol(optarg, &ep, 0);
+	    if (ep == optarg || *ep != '\0')
+		Error("can't decode address specified in -a option");
+	    break;
+	}
+
+	case 'b':
+	    if ((speed = cvtspeed(optarg)) == B0)
+		Error("can't decode baud rate specified in -b option");
+	    break;
+
+	case 'c':
+	    docont = 1;
+	    break;
+
+	case 'p':
+	    serialdev = optarg;
+	    break;
+
+	case 'v':
+	    verbose = 1;
+	    break;
+
+	default:
+	usage:
+	    fprintf(stderr,
+		"Usage: %s [-a addr] [-b bps] [-c] [-p dev] [-v] imagefile\n",
+		pname);
+	    exit(1);
+	}
+
+    if (optind != ac - 1)
+	goto usage;
+    ifn = av[optind++];
+
+    if (verbose)
+	fprintf(stderr, "Opening file and reading image...\n");
+
+    if ((ifd = open(ifn, O_RDONLY)) < 0)
+	Perror("can't open kernel image file '%s'", ifn);
+
+    if (fstat(ifd, &ist) < 0)
+	Perror("fstat '%s' failed", ifn);
+
+    if ((image = (char *)malloc(ist.st_size)) == NULL)
+	Perror("can't allocate %ld bytes for image", ist.st_size);
+
+    if ((c = read(ifd, image, ist.st_size)) < 0)
+	Perror("read of %d bytes from '%s' failed", ist.st_size, ifn);
+
+    if (c != ist.st_size)
+	Error("read of %ld bytes from '%s' failed (%d)", ist.st_size, ifn, c);
+
+    if (close(ifd) < 0)
+	Perror("close of '%s' failed", ifn);
+
+    if (verbose)
+	fprintf(stderr, "Opening serial port and sending image...\n");
+
+    if ((sfd = serialopen(serialdev, speed)) < 0)
+	Perror("open of serial device '%s' failed", serialdev);
+
+    remote_desc = sfd;
+    remote_reset();
+    remote_write_bytes(addr, image, ist.st_size);
+
+    if (docont) {
+	if (verbose)
+	    fprintf(stderr, "[continue]");
+	remote_continue();
+    }
+
+    if (serialclose(sfd) < 0)
+	Perror("close of serial device '%s' failed", serialdev);
+
+    if (verbose)
+	fprintf(stderr, "Done.\n");
+
+    return (0);
+}