1 files changed, 101 insertions, 0 deletions
diff --git a/commands/memset.c b/commands/memset.c
new file mode 100644
index 0000000000..48e55bc68e
--- /dev/null
+++ b/commands/memset.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * 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 version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ */
+
+/*
+ * Memory Functions
+ *
+ * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
+ */
+
+#include <common.h>
+#include <command.h>
+#include <init.h>
+#include <driver.h>
+#include <malloc.h>
+#include <errno.h>
+#include <fs.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <linux/stat.h>
+#include <xfuncs.h>
+
+extern char *mem_rw_buf;
+
+static int do_memset(int argc, char *argv[])
+{
+	loff_t	s, c, n;
+	int     fd;
+	char   *buf;
+	int	mode  = O_RWSIZE_1;
+	int     ret = 1;
+	char	*file = "/dev/mem";
+
+	if (mem_parse_options(argc, argv, "bwld:", &mode, NULL, &file,
+			NULL) < 0)
+		return 1;
+
+	if (optind + 3 > argc)
+		return COMMAND_ERROR_USAGE;
+
+	s = strtoull_suffix(argv[optind], NULL, 0);
+	c = strtoull_suffix(argv[optind + 1], NULL, 0);
+	n = strtoull_suffix(argv[optind + 2], NULL, 0);
+
+	fd = open_and_lseek(file, mode | O_WRONLY, s);
+	if (fd < 0)
+		return 1;
+
+	buf = xmalloc(RW_BUF_SIZE);
+	memset(buf, c, RW_BUF_SIZE);
+
+	while (n > 0) {
+		int now;
+
+		now = min((loff_t)RW_BUF_SIZE, n);
+
+		ret = write(fd, buf, now);
+		if (ret < 0) {
+			perror("write");
+			ret = 1;
+			goto out;
+		}
+
+		n -= now;
+	}
+
+	ret = 0;
+out:
+	close(fd);
+	free(buf);
+
+	return ret;
+}
+
+static const __maybe_unused char cmd_memset_help[] =
+"Usage: memset [OPTIONS] <addr> <c> <n>\n"
+"\n"
+"options:\n"
+"  -b, -w, -l   use byte, halfword, or word accesses\n"
+"  -d <file>    destination file (default /dev/mem)\n"
+"\n"
+"Fill the first <n> bytes at offset <addr> with byte <c>\n";
+
+BAREBOX_CMD_START(memset)
+	.cmd		= do_memset,
+	.usage		= "memory fill",
+	BAREBOX_CMD_HELP(cmd_memset_help)
+BAREBOX_CMD_END