/*
   * (C) Copyright 2013
   *
   * Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #ifndef _IMAGETOOL_H_
  #define _IMAGETOOL_H_
  
  #include "os_support.h"
  #include <errno.h>
  #include <fcntl.h>

  #include <stdbool.h>

  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <sys/stat.h>

  #include <sys/types.h>

  #include <time.h>
  #include <unistd.h>

  #include <u-boot/sha1.h>

  #include "fdt_host.h"
  
  #define ARRAY_SIZE(x)		(sizeof(x) / sizeof((x)[0]))
  
  #define IH_ARCH_DEFAULT		IH_ARCH_INVALID

  /* Information about a file that needs to be placed into the FIT */
  struct content_info {
  	struct content_info *next;
  	int type;		/* File type (IH_TYPE_...) */
  	const char *fname;
  };

  /*
   * This structure defines all such variables those are initialized by
   * mkimage and dumpimage main core and need to be referred by image
   * type specific functions
   */
  struct image_tool_params {
  	int dflag;
  	int eflag;
  	int fflag;

  	int iflag;

  	int lflag;

  	int pflag;

  	int vflag;
  	int xflag;
  	int skipcpy;
  	int os;
  	int arch;
  	int type;
  	int comp;
  	char *dtc;
  	unsigned int addr;
  	unsigned int ep;
  	char *imagename;
  	char *imagename2;
  	char *datafile;
  	char *imagefile;
  	char *cmdname;

  	const char *outfile;	/* Output filename */

  	const char *keydir;	/* Directory holding private keys */
  	const char *keydest;	/* Destination .dtb for public key */
  	const char *comment;	/* Comment to add to signature node */
  	int require_keys;	/* 1 to mark signing keys as 'required' */

  	int file_size;		/* Total size of output file */

  	int orig_file_size;	/* Original size for file before padding */

  	bool auto_its;		/* Automatically create the .its file */

  	int fit_image_type;	/* Image type to put into the FIT */

  	char *fit_ramdisk;	/* Ramdisk file to include */

  	struct content_info *content_head;	/* List of files to include */
  	struct content_info *content_tail;

  	bool external_data;	/* Store data outside the FIT */

  	bool quiet;		/* Don't output text in normal operation */

  	unsigned int external_offset;	/* Add padding to external data */

  	const char *engine_id;	/* Engine to use for signing */

  };
  
  /*
   * image type specific variables and callback functions
   */
  struct image_type_params {
  	/* name is an identification tag string for added support */
  	char *name;
  	/*
  	 * header size is local to the specific image type to be supported,
  	 * mkimage core treats this as number of bytes
  	 */
  	uint32_t header_size;
  	/* Image type header pointer */
  	void *hdr;
  	/*
  	 * There are several arguments that are passed on the command line
  	 * and are registered as flags in image_tool_params structure.
  	 * This callback function can be used to check the passed arguments
  	 * are in-lined with the image type to be supported
  	 *
  	 * Returns 1 if parameter check is successful
  	 */
  	int (*check_params) (struct image_tool_params *);
  	/*
  	 * This function is used by list command (i.e. mkimage -l <filename>)
  	 * image type verification code must be put here
  	 *
  	 * Returns 0 if image header verification is successful
  	 * otherwise, returns respective negative error codes
  	 */
  	int (*verify_header) (unsigned char *, int, struct image_tool_params *);
  	/* Prints image information abstracting from image header */
  	void (*print_header) (const void *);
  	/*
  	 * The header or image contents need to be set as per image type to
  	 * be generated using this callback function.
  	 * further output file post processing (for ex. checksum calculation,
  	 * padding bytes etc..) can also be done in this callback function.
  	 */
  	void (*set_header) (void *, struct stat *, int,
  					struct image_tool_params *);
  	/*

  	 * This function is used by the command to retrieve a component
  	 * (sub-image) from the image (i.e. dumpimage -i <image> -p <position>
  	 * <sub-image-name>).

  	 * Thus the code to extract a file from an image must be put here.
  	 *
  	 * Returns 0 if the file was successfully retrieved from the image,
  	 * or a negative value on error.
  	 */

  	int (*extract_subimage)(void *, struct image_tool_params *);

  	/*

  	 * Some image generation support for ex (default image type) supports
  	 * more than one type_ids, this callback function is used to check
  	 * whether input (-T <image_type>) is supported by registered image
  	 * generation/list low level code
  	 */
  	int (*check_image_type) (uint8_t);
  	/* This callback function will be executed if fflag is defined */
  	int (*fflag_handle) (struct image_tool_params *);
  	/*
  	 * This callback function will be executed for variable size record
  	 * It is expected to build this header in memory and return its length
  	 * and a pointer to it by using image_type_params.header_size and
  	 * image_type_params.hdr. The return value shall indicate if an
  	 * additional padding should be used when copying the data image
  	 * by returning the padding length.
  	 */
  	int (*vrec_header) (struct image_tool_params *,
  		struct image_type_params *);

  };

  /**
   * imagetool_get_type() - find the image type params for a given image type
   *
   * It scans all registers image type supports
   * checks the input type for each supported image type
   *
   * if successful,
   *     returns respective image_type_params pointer if success
   * if input type_id is not supported by any of image_type_support
   *     returns NULL
   */

  struct image_type_params *imagetool_get_type(int type);

  
  /*
   * imagetool_verify_print_header() - verifies the image header
   *
   * Scan registered image types and verify the image_header for each
   * supported image type. If verification is successful, this prints
   * the respective header.
   *
   * @return 0 on success, negative if input image format does not match with
   * any of supported image types
   */
  int imagetool_verify_print_header(
  	void *ptr,
  	struct stat *sbuf,
  	struct image_type_params *tparams,
  	struct image_tool_params *params);

  /**

   * imagetool_save_subimage - store data into a file

   * @file_name: name of the destination file
   * @file_data: data to be written
   * @file_len: the amount of data to store
   *

   * imagetool_save_subimage() store file_len bytes of data pointed by file_data

   * into the file name by file_name.
   *
   * returns:
   *     zero in case of success or a negative value if fail.
   */

  int imagetool_save_subimage(

  	const char *file_name,
  	ulong file_data,
  	ulong file_len);

  /**
   * imagetool_get_filesize() - Utility function to obtain the size of a file
   *
   * This function prints a message if an error occurs, showing the error that
   * was obtained.
   *
   * @params:	mkimage parameters
   * @fname:	filename to check
   * @return size of file, or -ve value on error
   */
  int imagetool_get_filesize(struct image_tool_params *params, const char *fname);

  /**
   * imagetool_get_source_date() - Get timestamp for build output.
   *
   * Gets a timestamp for embedding it in a build output. If set
   * SOURCE_DATE_EPOCH is used. Else the given fallback value is returned. Prints
   * an error message if SOURCE_DATE_EPOCH contains an invalid value and returns
   * 0.
   *
   * @params:	mkimage parameters
   * @fallback:	timestamp to use if SOURCE_DATE_EPOCH isn't set
   * @return timestamp based on SOURCE_DATE_EPOCH
   */
  time_t imagetool_get_source_date(
  	struct image_tool_params *params,
  	time_t fallback);

  /*
   * There is a c file associated with supported image type low level code
   * for ex. default_image.c, fit_image.c

   */

  
  void pbl_load_uboot(int fd, struct image_tool_params *mparams);

  #define ___cat(a, b) a ## b
  #define __cat(a, b) ___cat(a, b)
  
  /* we need some special handling for this host tool running eventually on
   * Darwin. The Mach-O section handling is a bit different than ELF section
   * handling. The differnces in detail are:
   *  a) we have segments which have sections
   *  b) we need a API call to get the respective section symbols */
  #if defined(__MACH__)
  #include <mach-o/getsect.h>
  
  #define INIT_SECTION(name)  do {					\
  		unsigned long name ## _len;				\
  		char *__cat(pstart_, name) = getsectdata("__TEXT",	\
  			#name, &__cat(name, _len));			\
  		char *__cat(pstop_, name) = __cat(pstart_, name) +	\
  			__cat(name, _len);				\
  		__cat(__start_, name) = (void *)__cat(pstart_, name);	\
  		__cat(__stop_, name) = (void *)__cat(pstop_, name);	\
  	} while (0)
  #define SECTION(name)   __attribute__((section("__TEXT, " #name)))
  
  struct image_type_params **__start_image_type, **__stop_image_type;
  #else
  #define INIT_SECTION(name) /* no-op for ELF */
  #define SECTION(name)   __attribute__((section(#name)))
  
  /* We construct a table of pointers in an ELF section (pointers generally
   * go unpadded by gcc).  ld creates boundary syms for us. */
  extern struct image_type_params *__start_image_type[], *__stop_image_type[];
  #endif /* __MACH__ */
  
  #if !defined(__used)
  # if __GNUC__ == 3 && __GNUC_MINOR__ < 3
  #  define __used			__attribute__((__unused__))
  # else
  #  define __used			__attribute__((__used__))
  # endif
  #endif

  #define U_BOOT_IMAGE_TYPE( \
  		_id, \
  		_name, \
  		_header_size, \
  		_header, \
  		_check_params, \
  		_verify_header, \
  		_print_header, \
  		_set_header, \

  		_extract_subimage, \

  		_check_image_type, \
  		_fflag_handle, \
  		_vrec_header \
  	) \

  	static struct image_type_params __cat(image_type_, _id) = \
  	{ \

  		.name = _name, \
  		.header_size = _header_size, \
  		.hdr = _header, \
  		.check_params = _check_params, \
  		.verify_header = _verify_header, \
  		.print_header = _print_header, \
  		.set_header = _set_header, \

  		.extract_subimage = _extract_subimage, \

  		.check_image_type = _check_image_type, \
  		.fflag_handle = _fflag_handle, \
  		.vrec_header = _vrec_header \

  	}; \
  	static struct image_type_params *SECTION(image_type) __used \
  		__cat(image_type_ptr_, _id) = &__cat(image_type_, _id)

  #endif /* _IMAGETOOL_H_ */