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/include/cbfs.h

@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __CBFS_H
+#define __CBFS_H
+
+#include <compiler.h>
+#include <linux/compiler.h>
+
+enum cbfs_result {
+	CBFS_SUCCESS = 0,
+	CBFS_NOT_INITIALIZED,
+	CBFS_BAD_HEADER,
+	CBFS_BAD_FILE,
+	CBFS_FILE_NOT_FOUND
+};
+
+enum cbfs_filetype {
+	CBFS_TYPE_STAGE = 0x10,
+	CBFS_TYPE_PAYLOAD = 0x20,
+	CBFS_TYPE_OPTIONROM = 0x30,
+	CBFS_TYPE_BOOTSPLASH = 0x40,
+	CBFS_TYPE_RAW = 0x50,
+	CBFS_TYPE_VSA = 0x51,
+	CBFS_TYPE_MBI = 0x52,
+	CBFS_TYPE_MICROCODE = 0x53,
+	CBFS_COMPONENT_CMOS_DEFAULT = 0xaa,
+	CBFS_COMPONENT_CMOS_LAYOUT = 0x01aa
+};
+
+struct cbfs_header {
+	u32 magic;
+	u32 version;
+	u32 rom_size;
+	u32 boot_block_size;
+	u32 align;
+	u32 offset;
+	u32 pad[2];
+} __packed;
+
+struct cbfs_fileheader {
+	u8 magic[8];
+	u32 len;
+	u32 type;
+	u32 checksum;
+	u32 offset;
+} __packed;
+
+struct cbfs_cachenode {
+	struct cbfs_cachenode *next;
+	u32 type;
+	void *data;
+	u32 data_length;
+	char *name;
+	u32 name_length;
+	u32 checksum;
+} __packed;
+
+extern enum cbfs_result file_cbfs_result;
+
+/**
+ * file_cbfs_error() - Return a string describing the most recent error
+ * condition.
+ *
+ * @return A pointer to the constant string.
+ */
+const char *file_cbfs_error(void);
+
+/**
+ * file_cbfs_init() - Initialize the CBFS driver and load metadata into RAM.
+ *
+ * @end_of_rom: Points to the end of the ROM the CBFS should be read
+ *                      from.
+ */
+void file_cbfs_init(uintptr_t end_of_rom);
+
+/**
+ * file_cbfs_get_header() - Get the header structure for the current CBFS.
+ *
+ * @return A pointer to the constant structure, or NULL if there is none.
+ */
+const struct cbfs_header *file_cbfs_get_header(void);
+
+/**
+ * file_cbfs_get_first() - Get a handle for the first file in CBFS.
+ *
+ * @return A handle for the first file in CBFS, NULL on error.
+ */
+const struct cbfs_cachenode *file_cbfs_get_first(void);
+
+/**
+ * file_cbfs_get_next() - Get a handle to the file after this one in CBFS.
+ *
+ * @file:		A pointer to the handle to advance.
+ */
+void file_cbfs_get_next(const struct cbfs_cachenode **file);
+
+/**
+ * file_cbfs_find() - Find a file with a particular name in CBFS.
+ *
+ * @name:		The name to search for.
+ *
+ * @return A handle to the file, or NULL on error.
+ */
+const struct cbfs_cachenode *file_cbfs_find(const char *name);
+
+
+/***************************************************************************/
+/* All of the functions below can be used without first initializing CBFS. */
+/***************************************************************************/
+
+/**
+ * file_cbfs_find_uncached() - Find a file with a particular name in CBFS
+ * without using the heap.
+ *
+ * @end_of_rom:		Points to the end of the ROM the CBFS should be read
+ *                      from.
+ * @name:		The name to search for.
+ *
+ * @return A handle to the file, or NULL on error.
+ */
+const struct cbfs_cachenode *file_cbfs_find_uncached(uintptr_t end_of_rom,
+						     const char *name);
+
+/**
+ * file_cbfs_name() - Get the name of a file in CBFS.
+ *
+ * @file:		The handle to the file.
+ *
+ * @return The name of the file, NULL on error.
+ */
+const char *file_cbfs_name(const struct cbfs_cachenode *file);
+
+/**
+ * file_cbfs_size() - Get the size of a file in CBFS.
+ *
+ * @file:		The handle to the file.
+ *
+ * @return The size of the file, zero on error.
+ */
+u32 file_cbfs_size(const struct cbfs_cachenode *file);
+
+/**
+ * file_cbfs_type() - Get the type of a file in CBFS.
+ *
+ * @file:		The handle to the file.
+ *
+ * @return The type of the file, zero on error.
+ */
+u32 file_cbfs_type(const struct cbfs_cachenode *file);
+
+/**
+ * file_cbfs_read() - Read a file from CBFS into RAM
+ *
+ * @file:		A handle to the file to read.
+ * @buffer:		Where to read it into memory.
+ * @maxsize:		Maximum number of bytes to read
+ *
+ * @return If positive or zero, the number of characters read. If negative, an
+ *	   error occurred.
+ */
+long file_cbfs_read(const struct cbfs_cachenode *file, void *buffer,
+		    unsigned long maxsize);
+
+#endif /* __CBFS_H */