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/esd/vme8349/caddy.h

@@ -0,0 +1,60 @@
+/*
+ * caddy.c -- esd VME8349 support for "missing" access modes in TSI148.
+ * Copyright (c) 2009 esd gmbh.
+ *
+ * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __CADDY_H__
+#define __CADDY_H__
+
+#define CMD_SIZE	1024
+#define ANSWER_SIZE	1024
+#define CADDY_MAGIC	"esd vme8349 V1.0"
+
+enum caddy_cmds {
+	CADDY_CMD_IO_READ_8,
+	CADDY_CMD_IO_READ_16,
+	CADDY_CMD_IO_READ_32,
+	CADDY_CMD_IO_WRITE_8,
+	CADDY_CMD_IO_WRITE_16,
+	CADDY_CMD_IO_WRITE_32,
+	CADDY_CMD_CONFIG_READ_8,
+	CADDY_CMD_CONFIG_READ_16,
+	CADDY_CMD_CONFIG_READ_32,
+	CADDY_CMD_CONFIG_WRITE_8,
+	CADDY_CMD_CONFIG_WRITE_16,
+	CADDY_CMD_CONFIG_WRITE_32,
+};
+
+struct caddy_cmd {
+	uint32_t cmd;
+	uint32_t issue;
+	uint32_t addr;
+	uint32_t par[5];
+};
+
+struct caddy_answer {
+	uint32_t answer;
+	uint32_t issue;
+	uint32_t status;
+	uint32_t par[5];
+};
+
+struct caddy_interface {
+	uint8_t  magic[16];
+	uint32_t cmd_in;
+	uint32_t cmd_out;
+	uint32_t heartbeat;
+	uint32_t reserved1;
+	struct caddy_cmd cmd[CMD_SIZE];
+	uint32_t answer_in;
+	uint32_t answer_out;
+	uint32_t reserved2;
+	uint32_t reserved3;
+	struct caddy_answer answer[CMD_SIZE];
+};
+
+#endif /* of __CADDY_H__ */