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/openrisc/include/asm/system.h

@@ -0,0 +1,26 @@
+/*
+ * (C) Copyright 2011, Julius Baxter <julius@opencores.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ASM_OPENRISC_SYSTEM_H
+#define __ASM_OPENRISC_SYSTEM_H
+
+#include <asm/spr-defs.h>
+
+static inline unsigned long mfspr(unsigned long add)
+{
+	unsigned long ret;
+
+	__asm__ __volatile__ ("l.mfspr %0,r0,%1" : "=r" (ret) : "K" (add));
+
+	return ret;
+}
+
+static inline void mtspr(unsigned long add, unsigned long val)
+{
+	__asm__ __volatile__ ("l.mtspr r0,%1,%0" : : "K" (add), "r" (val));
+}
+
+#endif /* __ASM_OPENRISC_SYSTEM_H */