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/post/cpu/ppc4xx/fpu.c

@@ -0,0 +1,41 @@
+/*
+ * (C) Copyright 2007
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Author: Sergei Poselenov <sposelenov@emcraft.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+
+#if defined(CONFIG_440EP) || \
+    defined(CONFIG_440EPX)
+
+#include <asm/processor.h>
+#include <asm/ppc4xx.h>
+
+
+int fpu_status(void)
+{
+	if (mfspr(SPRN_CCR0) & CCR0_DAPUIB)
+		return 0; /* Disabled */
+	else
+		return 1; /* Enabled */
+}
+
+
+void fpu_disable(void)
+{
+	mtspr(SPRN_CCR0, mfspr(SPRN_CCR0) | CCR0_DAPUIB);
+	mtmsr(mfmsr() & ~MSR_FP);
+}
+
+
+void fpu_enable(void)
+{
+	mtspr(SPRN_CCR0, mfspr(SPRN_CCR0) & ~CCR0_DAPUIB);
+	mtmsr(mfmsr() | MSR_FP);
+}
+
+#endif