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/sparc/include/asm/page.h

@@ -0,0 +1,28 @@
+/* page.h:  Various defines and such for MMU operations on the Sparc for
+ *          the Linux kernel.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 2007 Daniel Hellstrom (daniel@gaisler.com)
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _SPARC_PAGE_H
+#define _SPARC_PAGE_H
+
+#ifdef CONFIG_SUN4
+#define PAGE_SHIFT   13
+#else
+#define PAGE_SHIFT   12
+#endif
+
+#ifndef __ASSEMBLY__
+/* I have my suspicions... -DaveM */
+#define PAGE_SIZE    (1UL << PAGE_SHIFT)
+#else
+#define PAGE_SIZE    (1 << PAGE_SHIFT)
+#endif
+
+#define PAGE_MASK    (~(PAGE_SIZE-1))
+
+#endif				/* _SPARC_PAGE_H */