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/exports.h

@@ -0,0 +1,66 @@
+#ifndef __EXPORTS_H__
+#define __EXPORTS_H__
+
+#ifndef __ASSEMBLY__
+#ifdef CONFIG_PHY_AQUANTIA
+#include <miiphy.h>
+#include <phy.h>
+#endif
+
+struct spi_slave;
+
+/* These are declarations of exported functions available in C code */
+unsigned long get_version(void);
+int  getc(void);
+int  tstc(void);
+void putc(const char);
+void puts(const char*);
+int printf(const char* fmt, ...);
+void install_hdlr(int, interrupt_handler_t, void*);
+void free_hdlr(int);
+void *malloc(size_t);
+#if !CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE)
+void free(void*);
+#endif
+void __udelay(unsigned long);
+unsigned long get_timer(unsigned long);
+int vprintf(const char *, va_list);
+unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base);
+int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
+char *getenv (const char *name);
+int setenv (const char *varname, const char *varvalue);
+long simple_strtol(const char *cp, char **endp, unsigned int base);
+int strcmp(const char *cs, const char *ct);
+unsigned long ustrtoul(const char *cp, char **endp, unsigned int base);
+unsigned long long ustrtoull(const char *cp, char **endp, unsigned int base);
+#if defined(CONFIG_CMD_I2C) && \
+		(!defined(CONFIG_DM_I2C) || defined(CONFIG_DM_I2C_COMPAT))
+int i2c_write (uchar, uint, int , uchar* , int);
+int i2c_read (uchar, uint, int , uchar* , int);
+#endif
+#ifdef CONFIG_PHY_AQUANTIA
+struct mii_dev *mdio_get_current_dev(void);
+struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
+		phy_interface_t interface);
+struct phy_device *mdio_phydev_for_ethname(const char *ethname);
+int miiphy_set_current_dev(const char *devname);
+#endif
+
+void app_startup(char * const *);
+
+#endif    /* ifndef __ASSEMBLY__ */
+
+struct jt_funcs {
+#define EXPORT_FUNC(impl, res, func, ...) res(*func)(__VA_ARGS__);
+#include <_exports.h>
+#undef EXPORT_FUNC
+};
+
+
+#define XF_VERSION	8
+
+#if defined(CONFIG_X86)
+extern gd_t *global_data;
+#endif
+
+#endif	/* __EXPORTS_H__ */