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/sh/lib/time.c

@@ -0,0 +1,58 @@
+/*
+ * (C) Copyright 2009
+ * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * (C) Copyright 2007-2012
+ * Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <sh_tmu.h>
+
+#define TCR_TPSC 0x07
+
+static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE;
+
+unsigned long get_tbclk(void)
+{
+	u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
+	return get_tmu0_clk_rate() >> ((tmu_bit + 1) * 2);
+}
+
+unsigned long timer_read_counter(void)
+{
+	return ~readl(&tmu->tcnt0);
+}
+
+static void tmu_timer_start(unsigned int timer)
+{
+	if (timer > 2)
+		return;
+	writeb(readb(&tmu->tstr) | (1 << timer), &tmu->tstr);
+}
+
+static void tmu_timer_stop(unsigned int timer)
+{
+	if (timer > 2)
+		return;
+	writeb(readb(&tmu->tstr) & ~(1 << timer), &tmu->tstr);
+}
+
+int timer_init(void)
+{
+	u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
+	writew((readw(&tmu->tcr0) & ~TCR_TPSC) | tmu_bit, &tmu->tcr0);
+
+	tmu_timer_stop(0);
+	tmu_timer_start(0);
+
+	return 0;
+}
+