[new uImage] Add support for new uImage format to mkimage tool

Support for the new uImage format (FIT) is added to mkimage tool.
Commandline syntax is appropriately extended:

mkimage [-D dtc_options] -f fit-image.its fit-image

mkimage (together with dtc) takes fit-image.its and referenced therein
binaries (like vmlinux.bin.gz) as inputs, and produces fit-image file -- the
final image that can be transferred to the target (e.g., via tftp) and then
booted using the bootm command in U-Boot.

Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>

2 files changed, 211 insertions, 52 deletions

diff --git a/tools/mkimage.c b/tools/mkimage.c
index 5cb2bc7..6e1ff2b 100644
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -1,4 +1,6 @@
 /*
+ * (C) Copyright 2008 Semihalf
+ *
  * (C) Copyright 2000-2004
  * DENX Software Engineering
  * Wolfgang Denk, wd@denx.de
@@ -32,6 +34,8 @@ extern int errno;
 extern	unsigned long	crc32 (unsigned long crc, const char *buf, unsigned int len);
 static	void		copy_file (int, const char *, int);
 static	void		usage (void);
+static	void		image_verify_header (char *, int);
+static	void		fit_handle_file (void);
 
 char	*datafile;
 char	*imagefile;
@@ -39,6 +43,7 @@ char	*cmdname;
 
 int dflag    = 0;
 int eflag    = 0;
+int fflag    = 0;
 int lflag    = 0;
 int vflag    = 0;
 int xflag    = 0;
@@ -46,6 +51,7 @@ int opt_os   = IH_OS_LINUX;
 int opt_arch = IH_ARCH_PPC;
 int opt_type = IH_TYPE_KERNEL;
 int opt_comp = IH_COMP_GZIP;
+char *opt_dtc = MKIMAGE_DEFAULT_DTC_OPTIONS;
 
 image_header_t header;
 image_header_t *hdr = &header;
@@ -53,7 +59,7 @@ image_header_t *hdr = &header;
 int
 main (int argc, char **argv)
 {
-	int ifd;
+	int ifd = -1;
 	uint32_t checksum;
 	uint32_t addr;
 	uint32_t ep;
@@ -81,6 +87,12 @@ main (int argc, char **argv)
 				    (opt_comp = genimg_get_comp_id (*++argv)) < 0)
 					usage ();
 				goto NXTARG;
+			case 'D':
+				if (--argc <= 0)
+					usage ();
+				opt_dtc = *++argv;
+				goto NXTARG;
+
 			case 'O':
 				if ((--argc <= 0) ||
 				    (opt_os = genimg_get_os_id (*++argv)) < 0)
@@ -121,6 +133,12 @@ main (int argc, char **argv)
 				}
 				eflag = 1;
 				goto NXTARG;
+			case 'f':
+				if (--argc <= 0)
+					usage ();
+				datafile = *++argv;
+				fflag = 1;
+				goto NXTARG;
 			case 'n':
 				if (--argc <= 0)
 					usage ();
@@ -139,7 +157,10 @@ main (int argc, char **argv)
 NXTARG:		;
 	}
 
-	if ((argc != 1) || ((lflag ^ dflag) == 0))
+	if ((argc != 1) ||
+		(dflag && (fflag || lflag)) ||
+		(fflag && (dflag || lflag)) ||
+		(lflag && (dflag || fflag)))
 		usage();
 
 	if (!eflag) {
@@ -165,21 +186,22 @@ NXTARG:		;
 
 	imagefile = *argv;
 
-	if (lflag) {
-		ifd = open(imagefile, O_RDONLY|O_BINARY);
-	} else {
-		ifd = open(imagefile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
-	}
+	if (!fflag){
+		if (lflag) {
+			ifd = open (imagefile, O_RDONLY|O_BINARY);
+		} else {
+			ifd = open (imagefile,
+				O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
+		}
 
-	if (ifd < 0) {
-		fprintf (stderr, "%s: Can't open %s: %s\n",
-			cmdname, imagefile, strerror(errno));
-		exit (EXIT_FAILURE);
+		if (ifd < 0) {
+			fprintf (stderr, "%s: Can't open %s: %s\n",
+				cmdname, imagefile, strerror(errno));
+			exit (EXIT_FAILURE);
+		}
 	}
 
 	if (lflag) {
-		int len;
-		char *data;
 		/*
 		 * list header information of existing image
 		 */
@@ -204,44 +226,24 @@ NXTARG:		;
 			exit (EXIT_FAILURE);
 		}
 
-		/*
-		 * image_check_hcrc() creates copy of header so that
-		 * we can blank out the checksum field for checking -
-		 * this can't be done on the PROT_READ mapped data.
-		 */
-		hdr = (image_header_t *)ptr;
-
-		if (!image_check_magic (hdr)) {
-			fprintf (stderr,
-				"%s: Bad Magic Number: \"%s\" is no valid image\n",
-				cmdname, imagefile);
-			exit (EXIT_FAILURE);
-		}
-
-		if (!image_check_hcrc (hdr)) {
-			fprintf (stderr,
-				"%s: ERROR: \"%s\" has bad header checksum!\n",
-				cmdname, imagefile);
-			exit (EXIT_FAILURE);
+		if (fdt_check_header (ptr)) {
+			/* old-style image */
+			image_verify_header ((char *)ptr, sbuf.st_size);
+			image_print_contents_noindent ((image_header_t *)ptr);
+		} else {
+			/* FIT image */
+			fit_print_contents_noindent (ptr);
 		}
 
-		data = (char *)image_get_data (hdr);
-		len  = sbuf.st_size - image_get_header_size ();
-
-		if (crc32(0, data, len) != image_get_dcrc (hdr)) {
-			fprintf (stderr,
-				"%s: ERROR: \"%s\" has corrupted data!\n",
-				cmdname, imagefile);
-			exit (EXIT_FAILURE);
-		}
-
-		/* for multi-file images we need the data part, too */
-		image_print_contents_noindent ((image_header_t *)ptr);
-
 		(void) munmap((void *)ptr, sbuf.st_size);
 		(void) close (ifd);
 
 		exit (EXIT_SUCCESS);
+	} else if (fflag) {
+		/* Flattened Image Tree (FIT) format  handling */
+		debug ("FIT format handling\n");
+		fit_handle_file ();
+		exit (EXIT_SUCCESS);
 	}
 
 	/*
@@ -467,11 +469,11 @@ void
 usage ()
 {
 	fprintf (stderr, "Usage: %s -l image\n"
-			 "          -l ==> list image header information\n"
-			 "       %s [-x] -A arch -O os -T type -C comp "
-			 "-a addr -e ep -n name -d data_file[:data_file...] image\n",
-		cmdname, cmdname);
-	fprintf (stderr, "          -A ==> set architecture to 'arch'\n"
+			 "          -l ==> list image header information\n",
+		cmdname);
+	fprintf (stderr, "       %s [-x] -A arch -O os -T type -C comp "
+			 "-a addr -e ep -n name -d data_file[:data_file...] image\n"
+			 "          -A ==> set architecture to 'arch'\n"
 			 "          -O ==> set operating system to 'os'\n"
 			 "          -T ==> set image type to 'type'\n"
 			 "          -C ==> set compression type 'comp'\n"
@@ -479,7 +481,158 @@ usage ()
 			 "          -e ==> set entry point to 'ep' (hex)\n"
 			 "          -n ==> set image name to 'name'\n"
 			 "          -d ==> use image data from 'datafile'\n"
-			 "          -x ==> set XIP (execute in place)\n"
-		);
+			 "          -x ==> set XIP (execute in place)\n",
+		cmdname);
+	fprintf (stderr, "       %s [-D dtc_options] -f fit-image.its fit-image\n",
+		cmdname);
+
 	exit (EXIT_FAILURE);
 }
+
+static void
+image_verify_header (char *ptr, int image_size)
+{
+	int len;
+	char *data;
+	uint32_t checksum;
+	image_header_t header;
+	image_header_t *hdr = &header;
+
+	/*
+	 * create copy of header so that we can blank out the
+	 * checksum field for checking - this can't be done
+	 * on the PROT_READ mapped data.
+	 */
+	memcpy (hdr, ptr, sizeof(image_header_t));
+
+	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+		fprintf (stderr,
+			"%s: Bad Magic Number: \"%s\" is no valid image\n",
+			cmdname, imagefile);
+		exit (EXIT_FAILURE);
+	}
+
+	data = (char *)hdr;
+	len  = sizeof(image_header_t);
+
+	checksum = ntohl(hdr->ih_hcrc);
+	hdr->ih_hcrc = htonl(0);	/* clear for re-calculation */
+
+	if (crc32 (0, data, len) != checksum) {
+		fprintf (stderr,
+			"%s: ERROR: \"%s\" has bad header checksum!\n",
+			cmdname, imagefile);
+		exit (EXIT_FAILURE);
+	}
+
+	data = ptr + sizeof(image_header_t);
+	len  = image_size - sizeof(image_header_t) ;
+
+	if (crc32 (0, data, len) != ntohl(hdr->ih_dcrc)) {
+		fprintf (stderr,
+			"%s: ERROR: \"%s\" has corrupted data!\n",
+			cmdname, imagefile);
+		exit (EXIT_FAILURE);
+	}
+}
+
+/**
+ * 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 void fit_handle_file (void)
+{
+	char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
+	char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
+	int tfd;
+	struct stat sbuf;
+	unsigned char *ptr;
+
+	/* call dtc to include binary properties into the tmp file */
+	if (strlen (imagefile) + strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 >
+		sizeof (tmpfile)) {
+		fprintf (stderr, "%s: Image file name (%s) too long, "
+				"can't create tmpfile",
+				imagefile, cmdname);
+		exit (EXIT_FAILURE);
+	}
+	sprintf (tmpfile, "%s%s", imagefile, MKIMAGE_TMPFILE_SUFFIX);
+
+	/* dtc -I dts -O -p 200 datafile > tmpfile */
+	sprintf (cmd, "%s %s %s > %s",
+			MKIMAGE_DTC, opt_dtc, datafile, tmpfile);
+	debug ("Trying to execute \"%s\"\n", cmd);
+	if (system (cmd) == -1) {
+		fprintf (stderr, "%s: system(%s) failed: %s\n",
+				cmdname, cmd, strerror(errno));
+		unlink (tmpfile);
+		exit (EXIT_FAILURE);
+	}
+
+	/* load FIT blob into memory */
+	tfd = open (tmpfile, O_RDWR|O_BINARY);
+
+	if (tfd < 0) {
+		fprintf (stderr, "%s: Can't open %s: %s\n",
+				cmdname, tmpfile, strerror(errno));
+		unlink (tmpfile);
+		exit (EXIT_FAILURE);
+	}
+
+	if (fstat (tfd, &sbuf) < 0) {
+		fprintf (stderr, "%s: Can't stat %s: %s\n",
+				cmdname, tmpfile, strerror(errno));
+		unlink (tmpfile);
+		exit (EXIT_FAILURE);
+	}
+
+	ptr = (unsigned char *)mmap (0, sbuf.st_size,
+			PROT_READ|PROT_WRITE, MAP_SHARED, tfd, 0);
+	if ((caddr_t)ptr == (caddr_t)-1) {
+		fprintf (stderr, "%s: Can't read %s: %s\n",
+				cmdname, tmpfile, strerror(errno));
+		unlink (tmpfile);
+		exit (EXIT_FAILURE);
+	}
+
+	/* check if ptr has a valid blob */
+	if (fdt_check_header (ptr)) {
+		fprintf (stderr, "%s: Invalid FIT blob\n", cmdname);
+		unlink (tmpfile);
+		exit (EXIT_FAILURE);
+	}
+
+	/* set hashes for images in the blob */
+	if (fit_set_hashes (ptr)) {
+		fprintf (stderr, "%s Can't add hashes to FIT blob", cmdname);
+		unlink (tmpfile);
+		exit (EXIT_FAILURE);
+	}
+
+	/* add a timestamp at offset 0 i.e., root  */
+	if (fit_set_timestamp (ptr, 0, sbuf.st_mtime)) {
+		fprintf (stderr, "%s: Can't add image timestamp\n", cmdname);
+		unlink (tmpfile);
+		exit (EXIT_FAILURE);
+	}
+	debug ("Added timestamp successfully\n");
+
+	munmap ((void *)ptr, sbuf.st_size);
+	close (tfd);
+
+	if (rename (tmpfile, imagefile) == -1) {
+		fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
+				cmdname, tmpfile, imagefile, strerror (errno));
+		unlink (tmpfile);
+		unlink (imagefile);
+		exit (EXIT_FAILURE);
+	}
+}
diff --git a/tools/mkimage.h b/tools/mkimage.h
index 41cd156..a2d5248 100644
--- a/tools/mkimage.h
+++ b/tools/mkimage.h
@@ -43,6 +43,12 @@
 #define debug(fmt,args...)
 #endif /* MKIMAGE_DEBUG */
 
+#define MKIMAGE_TMPFILE_SUFFIX		".tmp"
+#define MKIMAGE_MAX_TMPFILE_LEN		256
+#define MKIMAGE_DEFAULT_DTC_OPTIONS	"-I dts -O dtb -p 500"
+#define MKIMAGE_MAX_DTC_CMDLINE_LEN	512
+#define MKIMAGE_DTC			"dtc"   /* assume dtc is in $PATH */
+
 #if defined(__BEOS__) || defined(__NetBSD__) || defined(__APPLE__)
 #include <inttypes.h>
 #endif