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/sandbox/include/asm/io.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __SANDBOX_ASM_IO_H
+#define __SANDBOX_ASM_IO_H
+
+/*
+ * Given a physical address and a length, return a virtual address
+ * that can be used to access the memory range with the caching
+ * properties specified by "flags".
+ */
+#define MAP_NOCACHE	(0)
+#define MAP_WRCOMBINE	(0)
+#define MAP_WRBACK	(0)
+#define MAP_WRTHROUGH	(0)
+
+void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags);
+
+/*
+ * Take down a mapping set up by map_physmem().
+ */
+void unmap_physmem(const void *vaddr, unsigned long flags);
+
+/* For sandbox, we want addresses to point into our RAM buffer */
+static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
+{
+	return map_physmem(paddr, len, MAP_WRBACK);
+}
+
+/* Remove a previous mapping */
+static inline void unmap_sysmem(const void *vaddr)
+{
+	unmap_physmem(vaddr, MAP_WRBACK);
+}
+
+/* Map from a pointer to our RAM buffer */
+phys_addr_t map_to_sysmem(const void *ptr);
+
+/* Define nops for sandbox I/O access */
+#define readb(addr) 0
+#define readw(addr) 0
+#define readl(addr) 0
+#define writeb(v, addr)
+#define writew(v, addr)
+#define writel(v, addr)
+
+/* I/O access functions */
+int inl(unsigned int addr);
+int inw(unsigned int addr);
+int inb(unsigned int addr);
+
+void outl(unsigned int value, unsigned int addr);
+void outw(unsigned int value, unsigned int addr);
+void outb(unsigned int value, unsigned int addr);
+
+static inline void _insw(volatile u16 *port, void *buf, int ns)
+{
+}
+
+static inline void _outsw(volatile u16 *port, const void *buf, int ns)
+{
+}
+
+#define insw(port, buf, ns)		_insw((u16 *)port, buf, ns)
+#define outsw(port, buf, ns)		_outsw((u16 *)port, buf, ns)
+
+/* For systemace.c */
+#define out16(addr, val)
+#define in16(addr)		0
+
+#include <iotrace.h>
+#include <asm/types.h>
+
+#endif