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/include/div64.h

@@ -0,0 +1,49 @@
+#ifndef _ASM_GENERIC_DIV64_H
+#define _ASM_GENERIC_DIV64_H
+/*
+ * Copyright (C) 2003 Bernardo Innocenti <bernie@develer.com>
+ * Based on former asm-ppc/div64.h and asm-m68knommu/div64.h
+ *
+ * The semantics of do_div() are:
+ *
+ * uint32_t do_div(uint64_t *n, uint32_t base)
+ * {
+ *	uint32_t remainder = *n % base;
+ *	*n = *n / base;
+ *	return remainder;
+ * }
+ *
+ * NOTE: macro parameter n is evaluated multiple times,
+ *       beware of side effects!
+ */
+
+#include <linux/types.h>
+
+extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
+
+/* The unnecessary pointer compare is there
+ * to check for type safety (n must be 64bit)
+ */
+# define do_div(n,base) ({				\
+	uint32_t __base = (base);			\
+	uint32_t __rem;					\
+	(void)(((typeof((n)) *)0) == ((uint64_t *)0));	\
+	if (((n) >> 32) == 0) {			\
+		__rem = (uint32_t)(n) % __base;		\
+		(n) = (uint32_t)(n) / __base;		\
+	} else						\
+		__rem = __div64_32(&(n), __base);	\
+	__rem;						\
+ })
+
+/* Wrapper for do_div(). Doesn't modify dividend and returns
+ * the result, not reminder.
+ */
+static inline uint64_t lldiv(uint64_t dividend, uint32_t divisor)
+{
+	uint64_t __res = dividend;
+	do_div(__res, divisor);
+	return(__res);
+}
+
+#endif /* _ASM_GENERIC_DIV64_H */