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/board/gdsys/405ep/405ep.c

@@ -0,0 +1,122 @@
+/*
+ * (C) Copyright 2010
+ * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/ppc4xx-gpio.h>
+#include <asm/global_data.h>
+
+#include "405ep.h"
+#include <gdsys_fpga.h>
+
+#define REFLECTION_TESTPATTERN 0xdede
+#define REFLECTION_TESTPATTERN_INV (~REFLECTION_TESTPATTERN & 0xffff)
+
+#ifdef CONFIG_SYS_FPGA_NO_RFL_HI
+#define REFLECTION_TESTREG reflection_low
+#else
+#define REFLECTION_TESTREG reflection_high
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int get_fpga_state(unsigned dev)
+{
+	return gd->arch.fpga_state[dev];
+}
+
+void print_fpga_state(unsigned dev)
+{
+	if (gd->arch.fpga_state[dev] & FPGA_STATE_DONE_FAILED)
+		puts("       Waiting for FPGA-DONE timed out.\n");
+	if (gd->arch.fpga_state[dev] & FPGA_STATE_REFLECTION_FAILED)
+		puts("       FPGA reflection test failed.\n");
+}
+
+int board_early_init_f(void)
+{
+	unsigned k;
+
+	for (k = 0; k < CONFIG_SYS_FPGA_COUNT; ++k)
+		gd->arch.fpga_state[k] = 0;
+
+	mtdcr(UIC0SR, 0xFFFFFFFF);	/* clear all ints */
+	mtdcr(UIC0ER, 0x00000000);	/* disable all ints */
+	mtdcr(UIC0CR, 0x00000000);	/* set all to be non-critical */
+	mtdcr(UIC0PR, 0xFFFFFF80);	/* set int polarities */
+	mtdcr(UIC0TR, 0x10000000);	/* set int trigger levels */
+	mtdcr(UIC0VCR, 0x00000001);	/* set vect base=0,INT0 highest prio */
+	mtdcr(UIC0SR, 0xFFFFFFFF);	/* clear all ints */
+
+	/*
+	 * EBC Configuration Register: set ready timeout to 512 ebc-clks
+	 * -> ca. 15 us
+	 */
+	mtebc(EBC0_CFG, 0xa8400000);	/* ebc always driven */
+	return 0;
+}
+
+int board_early_init_r(void)
+{
+	unsigned k;
+	unsigned ctr;
+
+	for (k = 0; k < CONFIG_SYS_FPGA_COUNT; ++k)
+		gd->arch.fpga_state[k] = 0;
+
+	/*
+	 * reset FPGA
+	 */
+	gd405ep_init();
+
+	gd405ep_set_fpga_reset(1);
+
+	gd405ep_setup_hw();
+
+	for (k = 0; k < CONFIG_SYS_FPGA_COUNT; ++k) {
+		ctr = 0;
+		while (!gd405ep_get_fpga_done(k)) {
+			udelay(100000);
+			if (ctr++ > 5) {
+				gd->arch.fpga_state[k] |=
+					FPGA_STATE_DONE_FAILED;
+				break;
+			}
+		}
+	}
+
+	udelay(10);
+
+	gd405ep_set_fpga_reset(0);
+
+	for (k = 0; k < CONFIG_SYS_FPGA_COUNT; ++k) {
+		/*
+		 * wait for fpga out of reset
+		 */
+		ctr = 0;
+		while (1) {
+			u16 val;
+
+			FPGA_SET_REG(k, reflection_low, REFLECTION_TESTPATTERN);
+
+			FPGA_GET_REG(k, REFLECTION_TESTREG, &val);
+			if (val == REFLECTION_TESTPATTERN_INV)
+				break;
+
+			udelay(100000);
+			if (ctr++ > 5) {
+				gd->arch.fpga_state[k] |=
+					FPGA_STATE_REFLECTION_FAILED;
+				break;
+			}
+		}
+	}
+
+	return 0;
+}