Add imls utility command

This patch adds, under tools folder, a new command called imls. Its
goal is the same of UBoot's imls but it can be used as Linux shell
command. It reads from raw mtd partition and prints the list of the
stored images.

Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com>
diff --git a/tools/imls/README b/tools/imls/README
new file mode 100644
index 0000000..97d7e32
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+++ b/tools/imls/README
@@ -0,0 +1,57 @@
+#
+# (C) Copyright 2009 Marco Stornelli <marco.stornelli@gmail.com>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# The files in this directory are free software; you can redistribute
+# them and/or modify them under the terms of the GNU General Public
+# License as published by the Free Software Foundation; either
+# version 2 of the License, or (at your option) any later version.
+#
+# These files are distributed in the hope that they will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+IMLS
+-------------
+
+imls is an implementation of a Linux command line tool to access
+to raw flash partitions and list images made with mkimage command.
+
+For building against older versions of the MTD headers (meaning before
+v2.6.8-rc1) it is required to pass the argument "MTD_VERSION=old" to
+make.
+
+Usage examples
+--------------
+
+1) Flash with sectors of 128KiB and 32 sectors:
+
+> imls -c 32 -s 131072 /dev/mtd0
+Searching...
+Image Name:   foo
+Created:      Fri Apr 10 18:11:30 2009
+Image Type:   Intel x86 Linux Standalone Program (uncompressed)
+Data Size:    10716 Bytes = 10.46 kB = 0.01 MB
+Load Address: 00000000
+Entry Point:  00000000
+
+2) Flash with sectors of 64KiB and 128 sectors and with a search offset of one
+sector:
+
+> imls -o 1 -c 128 -s 65536 /dev/mtd0
+Searching...
+Image Name:   foo
+Created:      Fri Apr 10 18:11:30 2009
+Image Type:   Intel x86 Linux Standalone Program (uncompressed)
+Data Size:    10716 Bytes = 10.46 kB = 0.01 MB
+Load Address: 00000000
+Entry Point:  00000000