/*
   * (C) Copyright 2001
   * Kyle Harris, kharris@nexus-tech.net
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  /*
   * The "source" command allows to define "script images", i. e. files
   * that contain command sequences that can be executed by the command
   * interpreter. It returns the exit status of the last command
   * executed from the script. This is very similar to running a shell
   * script in a UNIX shell, hence the name for the command.
   */
  
  /* #define DEBUG */
  
  #include <common.h>
  #include <command.h>
  #include <image.h>
  #include <malloc.h>
  #include <asm/byteorder.h>
  #include <asm/io.h>
  #if defined(CONFIG_8xx)
  #include <mpc8xx.h>
  #endif
  
  int
  source (ulong addr, const char *fit_uname)
  {
  	ulong		len;
  #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
  	const image_header_t *hdr;
  #endif
  	ulong		*data;
  	int		verify;
  	void *buf;
  #if defined(CONFIG_FIT)
  	const void*	fit_hdr;
  	int		noffset;
  	const void	*fit_data;
  	size_t		fit_len;
  #endif
  
  	verify = getenv_yesno ("verify");
  
  	buf = map_sysmem(addr, 0);
  	switch (genimg_get_format(buf)) {
  #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
  	case IMAGE_FORMAT_LEGACY:
  		hdr = buf;
  
  		if (!image_check_magic (hdr)) {
  			puts ("Bad magic number
  ");
  			return 1;
  		}
  
  		if (!image_check_hcrc (hdr)) {
  			puts ("Bad header crc
  ");
  			return 1;
  		}
  
  		if (verify) {
  			if (!image_check_dcrc (hdr)) {
  				puts ("Bad data crc
  ");
  				return 1;
  			}
  		}
  
  		if (!image_check_type (hdr, IH_TYPE_SCRIPT)) {
  			puts ("Bad image type
  ");
  			return 1;
  		}
  
  		/* get length of script */
  		data = (ulong *)image_get_data (hdr);
  
  		if ((len = uimage_to_cpu (*data)) == 0) {
  			puts ("Empty Script
  ");
  			return 1;
  		}
  
  		/*
  		 * scripts are just multi-image files with one component, seek
  		 * past the zero-terminated sequence of image lengths to get
  		 * to the actual image data
  		 */
  		while (*data++);
  		break;
  #endif
  #if defined(CONFIG_FIT)
  	case IMAGE_FORMAT_FIT:
  		if (fit_uname == NULL) {
  			puts ("No FIT subimage unit name
  ");
  			return 1;
  		}
  
  		fit_hdr = buf;
  		if (!fit_check_format (fit_hdr)) {
  			puts ("Bad FIT image format
  ");
  			return 1;
  		}
  
  		/* get script component image node offset */
  		noffset = fit_image_get_node (fit_hdr, fit_uname);
  		if (noffset < 0) {
  			printf ("Can't find '%s' FIT subimage
  ", fit_uname);
  			return 1;
  		}
  
  		if (!fit_image_check_type (fit_hdr, noffset, IH_TYPE_SCRIPT)) {
  			puts ("Not a image image
  ");
  			return 1;
  		}
  
  		/* verify integrity */
  		if (verify) {
  			if (!fit_image_verify(fit_hdr, noffset)) {
  				puts ("Bad Data Hash
  ");
  				return 1;
  			}
  		}
  
  		/* get script subimage data address and length */
  		if (fit_image_get_data (fit_hdr, noffset, &fit_data, &fit_len)) {
  			puts ("Could not find script subimage data
  ");
  			return 1;
  		}
  
  		data = (ulong *)fit_data;
  		len = (ulong)fit_len;
  		break;
  #endif
  	default:
  		puts ("Wrong image format for \"source\" command
  ");
  		return 1;
  	}
  
  	debug ("** Script length: %ld
  ", len);
  	return run_command_list((char *)data, len, 0);
  }
  
  /**************************************************/
  #if defined(CONFIG_CMD_SOURCE)
  static int do_source(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  {
  	ulong addr;
  	int rcode;
  	const char *fit_uname = NULL;
  
  	/* Find script image */
  	if (argc < 2) {
  		addr = CONFIG_SYS_LOAD_ADDR;
  		debug ("*  source: default load address = 0x%08lx
  ", addr);
  #if defined(CONFIG_FIT)
  	} else if (fit_parse_subimage (argv[1], load_addr, &addr, &fit_uname)) {
  		debug ("*  source: subimage '%s' from FIT image at 0x%08lx
  ",
  				fit_uname, addr);
  #endif
  	} else {
  		addr = simple_strtoul(argv[1], NULL, 16);
  		debug ("*  source: cmdline image address = 0x%08lx
  ", addr);
  	}
  
  	printf ("## Executing script at %08lx
  ", addr);
  	rcode = source (addr, fit_uname);
  	return rcode;
  }
  
  #ifdef CONFIG_SYS_LONGHELP
  static char source_help_text[] =
  	"[addr]
  "
  	"\t- run script starting at addr
  "
  	"\t- A valid image header must be present"
  #if defined(CONFIG_FIT)
  	"
  "
  	"For FIT format uImage addr must include subimage
  "
  	"unit name in the form of addr:<subimg_uname>"
  #endif
  	"";
  #endif
  
  U_BOOT_CMD(
  	source, 2, 0,	do_source,
  	"run script from memory", source_help_text
  );
  #endif