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  • /*
     * (C) Copyright 2008 Semihalf
     *
     * (C) Copyright 2000-2004
     * DENX Software Engineering
     * Wolfgang Denk, wd@denx.de
     *
     * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
     *		FIT image specific code abstracted from mkimage.c
     *		some functions added to address abstraction
     *
     * All rights reserved.
     *
    
     * SPDX-License-Identifier:	GPL-2.0+
    
     */
    
    #include "mkimage.h"
    #include <image.h>
    #include <u-boot/crc.h>
    
    static image_header_t header;
    
    static int fit_verify_header (unsigned char *ptr, int image_size,
    			struct mkimage_params *params)
    {
    	return fdt_check_header ((void *)ptr);
    }
    
    static int fit_check_image_types (uint8_t type)
    {
    	if (type == IH_TYPE_FLATDT)
    		return EXIT_SUCCESS;
    	else
    		return EXIT_FAILURE;
    }
    
    
    int mmap_fdt(struct mkimage_params *params, const char *fname, void **blobp,
    		struct stat *sbuf)
    {
    	void *ptr;
    	int fd;
    
    	/* Load FIT blob into memory (we need to write hashes/signatures) */
    	fd = open(fname, O_RDWR | O_BINARY);
    
    	if (fd < 0) {
    		fprintf(stderr, "%s: Can't open %s: %s\n",
    			params->cmdname, fname, strerror(errno));
    		unlink(fname);
    		return -1;
    	}
    
    	if (fstat(fd, sbuf) < 0) {
    		fprintf(stderr, "%s: Can't stat %s: %s\n",
    			params->cmdname, fname, strerror(errno));
    		unlink(fname);
    		return -1;
    	}
    
    	ptr = mmap(0, sbuf->st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
    	if (ptr == MAP_FAILED) {
    		fprintf(stderr, "%s: Can't read %s: %s\n",
    			params->cmdname, fname, strerror(errno));
    		unlink(fname);
    		return -1;
    	}
    
    	/* check if ptr has a valid blob */
    	if (fdt_check_header(ptr)) {
    		fprintf(stderr, "%s: Invalid FIT blob\n", params->cmdname);
    		unlink(fname);
    		return -1;
    	}
    
    	*blobp = ptr;
    	return fd;
    }
    
    
    /**
     * fit_handle_file - main FIT file processing function
     *
     * fit_handle_file() runs dtc to convert .its to .itb, includes
     * binary data, updates timestamp property and calculates hashes.
     *
     * datafile  - .its file
     * imagefile - .itb file
     *
     * returns:
     *     only on success, otherwise calls exit (EXIT_FAILURE);
     */
    static int fit_handle_file (struct mkimage_params *params)
    {
    	char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
    	char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
    
    	int tfd, destfd = 0;
    	void *dest_blob = NULL;
    
    	off_t destfd_size = 0;
    
    
    	/* Flattened Image Tree (FIT) format  handling */
    	debug ("FIT format handling\n");
    
    	/* call dtc to include binary properties into the tmp file */
    	if (strlen (params->imagefile) +
    		strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) {
    		fprintf (stderr, "%s: Image file name (%s) too long, "
    				"can't create tmpfile",
    				params->imagefile, params->cmdname);
    		return (EXIT_FAILURE);
    	}
    	sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX);
    
    
    	/* We either compile the source file, or use the existing FIT image */
    	if (params->datafile) {
    		/* dtc -I dts -O dtb -p 500 datafile > tmpfile */
    		snprintf(cmd, sizeof(cmd), "%s %s %s > %s",
    			 MKIMAGE_DTC, params->dtc, params->datafile, tmpfile);
    		debug("Trying to execute \"%s\"\n", cmd);
    	} else {
    		snprintf(cmd, sizeof(cmd), "cp %s %s",
    			 params->imagefile, tmpfile);
    	}
    
    	if (system (cmd) == -1) {
    		fprintf (stderr, "%s: system(%s) failed: %s\n",
    				params->cmdname, cmd, strerror(errno));
    
    	if (params->keydest) {
    		destfd = mmap_fdt(params, params->keydest, &dest_blob, &sbuf);
    		if (destfd < 0)
    			goto err_keydest;
    		destfd_size = sbuf.st_size;
    	}
    
    
    	tfd = mmap_fdt(params, tmpfile, &ptr, &sbuf);
    	if (tfd < 0)
    		goto err_mmap;
    
    
    	/* set hashes for images in the blob */
    
    	if (fit_add_verification_data(params->keydir,
    				      dest_blob, ptr, params->comment,
    				      params->require_keys)) {
    		fprintf(stderr, "%s Can't add hashes to FIT blob\n",
    			params->cmdname);
    
    	/* for first image creation, add a timestamp at offset 0 i.e., root  */
    	if (params->datafile && fit_set_timestamp(ptr, 0, sbuf.st_mtime)) {
    
    		fprintf (stderr, "%s: Can't add image timestamp\n",
    				params->cmdname);
    
    	}
    	debug ("Added timestamp successfully\n");
    
    	munmap ((void *)ptr, sbuf.st_size);
    	close (tfd);
    
    	if (dest_blob) {
    		munmap(dest_blob, destfd_size);
    		close(destfd);
    	}
    
    
    	if (rename (tmpfile, params->imagefile) == -1) {
    		fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
    				params->cmdname, tmpfile, params->imagefile,
    				strerror (errno));
    		unlink (tmpfile);
    		unlink (params->imagefile);
    		return (EXIT_FAILURE);
    	}
    	return (EXIT_SUCCESS);
    
    
    err_add_timestamp:
    err_add_hashes:
    	munmap(ptr, sbuf.st_size);
    err_mmap:
    
    	if (dest_blob)
    		munmap(dest_blob, destfd_size);
    err_keydest:
    
    err_system:
    	unlink(tmpfile);
    	return -1;
    
    }
    
    static int fit_check_params (struct mkimage_params *params)
    {
    	return	((params->dflag && (params->fflag || params->lflag)) ||
    		(params->fflag && (params->dflag || params->lflag)) ||
    		(params->lflag && (params->dflag || params->fflag)));
    }
    
    static struct image_type_params fitimage_params = {
    	.name = "FIT Image support",
    	.header_size = sizeof(image_header_t),
    	.hdr = (void*)&header,
    	.verify_header = fit_verify_header,
    	.print_header = fit_print_contents,
    	.check_image_type = fit_check_image_types,
    	.fflag_handle = fit_handle_file,
    
    	.set_header = NULL,	/* FIT images use DTB header */
    
    	.check_params = fit_check_params,
    };
    
    void init_fit_image_type (void)
    {
    	mkimage_register (&fitimage_params);
    }