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/arch/m68k/lib/ashldi3.c

@@ -0,0 +1,50 @@
+/*
+ * ashldi3.c extracted from gcc-2.7.2.3/libgcc2.c and
+ *			   gcc-2.7.2.3/longlong.h
+ *
+ * Copyright (C) 1989-2015 Free Software Foundation, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#define BITS_PER_UNIT 8
+
+typedef		 int SItype	__attribute__ ((mode (SI)));
+typedef unsigned int USItype	__attribute__ ((mode (SI)));
+typedef		 int DItype	__attribute__ ((mode (DI)));
+typedef int word_type __attribute__ ((mode (__word__)));
+
+struct DIstruct {SItype high, low;};
+
+typedef union
+{
+  struct DIstruct s;
+  DItype ll;
+} DIunion;
+
+DItype __ashldi3 (DItype u, word_type b)
+{
+	DIunion w;
+	word_type bm;
+	DIunion uu;
+
+	if (b == 0)
+		return u;
+
+	uu.ll = u;
+
+	bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
+	if (bm <= 0)
+	{
+		w.s.low = 0;
+		w.s.high = (USItype)uu.s.low << -bm;
+	}
+	else
+	{
+		USItype carries = (USItype)uu.s.low >> bm;
+		w.s.low = (USItype)uu.s.low << b;
+		w.s.high = ((USItype)uu.s.high << b) | carries;
+	}
+
+	return w.ll;
+}