diff --git a/common/cli_simple.c b/common/cli_simple.c
new file mode 100644
index 0000000..0610615
--- /dev/null
+++ b/common/cli_simple.c
@@ -0,0 +1,338 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Add to readline cmdline-editing by
+ * (C) Copyright 2005
+ * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <cli.h>
+#include <linux/ctype.h>
+
+#define DEBUG_PARSER	0	/* set to 1 to debug */
+
+#define debug_parser(fmt, args...)		\
+	debug_cond(DEBUG_PARSER, fmt, ##args)
+
+
+int parse_line(char *line, char *argv[])
+{
+	int nargs = 0;
+
+	debug_parser("%s: \"%s\"\n", __func__, line);
+	while (nargs < CONFIG_SYS_MAXARGS) {
+		/* skip any white space */
+		while (isblank(*line))
+			++line;
+
+		if (*line == '\0') {	/* end of line, no more args	*/
+			argv[nargs] = NULL;
+			debug_parser("%s: nargs=%d\n", __func__, nargs);
+			return nargs;
+		}
+
+		argv[nargs++] = line;	/* begin of argument string	*/
+
+		/* find end of string */
+		while (*line && !isblank(*line))
+			++line;
+
+		if (*line == '\0') {	/* end of line, no more args	*/
+			argv[nargs] = NULL;
+			debug_parser("parse_line: nargs=%d\n", nargs);
+			return nargs;
+		}
+
+		*line++ = '\0';		/* terminate current arg	 */
+	}
+
+	printf("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
+
+	debug_parser("%s: nargs=%d\n", __func__, nargs);
+	return nargs;
+}
+
+static void process_macros(const char *input, char *output)
+{
+	char c, prev;
+	const char *varname_start = NULL;
+	int inputcnt = strlen(input);
+	int outputcnt = CONFIG_SYS_CBSIZE;
+	int state = 0;		/* 0 = waiting for '$'  */
+
+	/* 1 = waiting for '(' or '{' */
+	/* 2 = waiting for ')' or '}' */
+	/* 3 = waiting for '''  */
+	char *output_start = output;
+
+	debug_parser("[PROCESS_MACROS] INPUT len %zd: \"%s\"\n", strlen(input),
+		     input);
+
+	prev = '\0';		/* previous character   */
+
+	while (inputcnt && outputcnt) {
+		c = *input++;
+		inputcnt--;
+
+		if (state != 3) {
+			/* remove one level of escape characters */
+			if ((c == '\\') && (prev != '\\')) {
+				if (inputcnt-- == 0)
+					break;
+				prev = c;
+				c = *input++;
+			}
+		}
+
+		switch (state) {
+		case 0:	/* Waiting for (unescaped) $    */
+			if ((c == '\'') && (prev != '\\')) {
+				state = 3;
+				break;
+			}
+			if ((c == '$') && (prev != '\\')) {
+				state++;
+			} else {
+				*(output++) = c;
+				outputcnt--;
+			}
+			break;
+		case 1:	/* Waiting for (        */
+			if (c == '(' || c == '{') {
+				state++;
+				varname_start = input;
+			} else {
+				state = 0;
+				*(output++) = '$';
+				outputcnt--;
+
+				if (outputcnt) {
+					*(output++) = c;
+					outputcnt--;
+				}
+			}
+			break;
+		case 2:	/* Waiting for )        */
+			if (c == ')' || c == '}') {
+				int i;
+				char envname[CONFIG_SYS_CBSIZE], *envval;
+				/* Varname # of chars */
+				int envcnt = input - varname_start - 1;
+
+				/* Get the varname */
+				for (i = 0; i < envcnt; i++)
+					envname[i] = varname_start[i];
+				envname[i] = 0;
+
+				/* Get its value */
+				envval = getenv(envname);
+
+				/* Copy into the line if it exists */
+				if (envval != NULL)
+					while ((*envval) && outputcnt) {
+						*(output++) = *(envval++);
+						outputcnt--;
+					}
+				/* Look for another '$' */
+				state = 0;
+			}
+			break;
+		case 3:	/* Waiting for '        */
+			if ((c == '\'') && (prev != '\\')) {
+				state = 0;
+			} else {
+				*(output++) = c;
+				outputcnt--;
+			}
+			break;
+		}
+		prev = c;
+	}
+
+	if (outputcnt)
+		*output = 0;
+	else
+		*(output - 1) = 0;
+
+	debug_parser("[PROCESS_MACROS] OUTPUT len %zd: \"%s\"\n",
+		     strlen(output_start), output_start);
+}
+
+ /*
+ * WARNING:
+ *
+ * We must create a temporary copy of the command since the command we get
+ * may be the result from getenv(), which returns a pointer directly to
+ * the environment data, which may change magicly when the command we run
+ * creates or modifies environment variables (like "bootp" does).
+ */
+int cli_simple_run_command(const char *cmd, int flag)
+{
+	char cmdbuf[CONFIG_SYS_CBSIZE];	/* working copy of cmd		*/
+	char *token;			/* start of token in cmdbuf	*/
+	char *sep;			/* end of token (separator) in cmdbuf */
+	char finaltoken[CONFIG_SYS_CBSIZE];
+	char *str = cmdbuf;
+	char *argv[CONFIG_SYS_MAXARGS + 1];	/* NULL terminated	*/
+	int argc, inquotes;
+	int repeatable = 1;
+	int rc = 0;
+
+	debug_parser("[RUN_COMMAND] cmd[%p]=\"", cmd);
+	if (DEBUG_PARSER) {
+		/* use puts - string may be loooong */
+		puts(cmd ? cmd : "NULL");
+		puts("\"\n");
+	}
+	clear_ctrlc();		/* forget any previous Control C */
+
+	if (!cmd || !*cmd)
+		return -1;	/* empty command */
+
+	if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
+		puts("## Command too long!\n");
+		return -1;
+	}
+
+	strcpy(cmdbuf, cmd);
+
+	/* Process separators and check for invalid
+	 * repeatable commands
+	 */
+
+	debug_parser("[PROCESS_SEPARATORS] %s\n", cmd);
+	while (*str) {
+		/*
+		 * Find separator, or string end
+		 * Allow simple escape of ';' by writing "\;"
+		 */
+		for (inquotes = 0, sep = str; *sep; sep++) {
+			if ((*sep == '\'') &&
+			    (*(sep - 1) != '\\'))
+				inquotes = !inquotes;
+
+			if (!inquotes &&
+			    (*sep == ';') &&	/* separator		*/
+			    (sep != str) &&	/* past string start	*/
+			    (*(sep - 1) != '\\'))	/* and NOT escaped */
+				break;
+		}
+
+		/*
+		 * Limit the token to data between separators
+		 */
+		token = str;
+		if (*sep) {
+			str = sep + 1;	/* start of command for next pass */
+			*sep = '\0';
+		} else {
+			str = sep;	/* no more commands for next pass */
+		}
+		debug_parser("token: \"%s\"\n", token);
+
+		/* find macros in this token and replace them */
+		process_macros(token, finaltoken);
+
+		/* Extract arguments */
+		argc = parse_line(finaltoken, argv);
+		if (argc == 0) {
+			rc = -1;	/* no command at all */
+			continue;
+		}
+
+		if (cmd_process(flag, argc, argv, &repeatable, NULL))
+			rc = -1;
+
+		/* Did the user stop this? */
+		if (had_ctrlc())
+			return -1;	/* if stopped then not repeatable */
+	}
+
+	return rc ? rc : repeatable;
+}
+
+void cli_loop(void)
+{
+	static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
+
+	int len;
+	int flag;
+	int rc = 1;
+
+	for (;;) {
+#ifdef CONFIG_BOOT_RETRY_TIME
+		if (rc >= 0) {
+			/* Saw enough of a valid command to
+			 * restart the timeout.
+			 */
+			reset_cmd_timeout();
+		}
+#endif
+		len = readline(CONFIG_SYS_PROMPT);
+
+		flag = 0;	/* assume no special flags for now */
+		if (len > 0)
+			strcpy(lastcommand, console_buffer);
+		else if (len == 0)
+			flag |= CMD_FLAG_REPEAT;
+#ifdef CONFIG_BOOT_RETRY_TIME
+		else if (len == -2) {
+			/* -2 means timed out, retry autoboot
+			 */
+			puts("\nTimed out waiting for command\n");
+# ifdef CONFIG_RESET_TO_RETRY
+			/* Reinit board to run initialization code again */
+			do_reset(NULL, 0, 0, NULL);
+# else
+			return;		/* retry autoboot */
+# endif
+		}
+#endif
+
+		if (len == -1)
+			puts("<INTERRUPT>\n");
+		else
+			rc = run_command(lastcommand, flag);
+
+		if (rc <= 0) {
+			/* invalid command or not repeatable, forget it */
+			lastcommand[0] = 0;
+		}
+	}
+}
+
+int cli_simple_run_command_list(char *cmd, int flag)
+{
+	char *line, *next;
+	int rcode = 0;
+
+	/*
+	 * Break into individual lines, and execute each line; terminate on
+	 * error.
+	 */
+	next = cmd;
+	line = cmd;
+	while (*next) {
+		if (*next == '\n') {
+			*next = '\0';
+			/* run only non-empty commands */
+			if (*line) {
+				debug("** exec: \"%s\"\n", line);
+				if (cli_simple_run_command(line, 0) < 0) {
+					rcode = 1;
+					break;
+				}
+			}
+			line = next + 1;
+		}
+		++next;
+	}
+	if (rcode == 0 && *line)
+		rcode = (cli_simple_run_command(line, 0) >= 0);
+
+	return rcode;
+}