Adds a bunzip2 command in common/cmd_bzip2.c

Index: common/cmd_bzip2.c
===================================================================
@@ -0,0 +1,66 @@
+/*
+ * (C) Copyright 2007
+ * Liberty Eran, Extricom, eran.liberty at gmail.com
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it 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.
+ *
+ * This program is distributed in the hope that it 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
+ */
+
+#include <common.h>
+#include <command.h>
+#include <bzlib.h>
+
+#if defined(CONFIG_BZIP2)
+int do_bunzip2 (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	ulong addr, dest, count;
+	unsigned int destSize;
+	int rc;
+
+	if (argc != 4) {
+		printf ("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+	/* Check for size specification.
+	 */
+	addr = simple_strtoul (argv[1], NULL, 16);
+	dest = simple_strtoul (argv[2], NULL, 16);
+	count = simple_strtoul (argv[3], NULL, 16);
+
+	if (count == 0) {
+		puts ("BUNZIP2 ERROR: Zero length ???\n");
+		return 1;
+	}
+
+	if ((rc =
+	     BZ2_bzBuffToBuffDecompress ((char *)dest, &destSize, (char *)addr,
+					 count, 1, 0)) != BZ_OK) {
+		printf ("BUNZIP2 ERROR: %d\n", rc);
+		return 1;
+	}
+	printf
+	    ("BUNZIP2: decompressed image address & size: 0x%08x 0x%x (%d)\n",
+	     dest, destSize, destSize);
+	return 0;
+
+}
+
+U_BOOT_CMD (bunzip2, 4, 4, do_bunzip2,
+	    "bunzip2 - decompress bz2 buffers\n", "src dest size_of_src\n");
+#endif