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/openrisc_exc.h

@@ -0,0 +1,28 @@
+/*
+ * (C) Copyright 2011, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _OPENRISC_EXC_H_
+#define _OPENRISC_EXC_H_
+
+#define EXC_RESET		0x01
+#define EXC_BUS_ERROR		0x02
+#define EXC_DATA_PAGE_FAULT	0x03
+#define EXC_INSTR_PAGE_FAULT	0x04
+#define EXC_TIMER		0x05
+#define EXC_ALIGNMENT		0x06
+#define EXC_ILLEGAL_INSTR	0x07
+#define EXC_EXT_IRQ		0x08
+#define EXC_DTLB_MISS		0x09
+#define EXC_ITLB_MISS		0x0a
+#define EXC_RANGE		0x0b
+#define EXC_SYSCALL		0x0c
+#define EXC_FLOAT_POINT		0x0d
+#define EXC_TRAP		0x0e
+
+void exception_install_handler(int exception, void (*handler)(void));
+void exception_free_handler(int exception);
+
+#endif