diff options
| -rw-r--r-- | common/cmd_setexpr.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/common/cmd_setexpr.c b/common/cmd_setexpr.c index 7b140de..5a04295 100644 --- a/common/cmd_setexpr.c +++ b/common/cmd_setexpr.c @@ -57,12 +57,22 @@ static int do_setexpr(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) int w; /* Validate arguments */ - if ((argc != 5) || (strlen(argv[3]) != 1)) + if (argc != 5 && argc != 3) + return CMD_RET_USAGE; + if (argc == 5 && strlen(argv[3]) != 1) return CMD_RET_USAGE; w = cmd_get_data_size(argv[0], 4); a = get_arg(argv[2], w); + + if (argc == 3) { + sprintf(buf, "%lx", a); + setenv(argv[1], buf); + + return 0; + } + b = get_arg(argv[4], w); switch (argv[3][0]) { @@ -87,8 +97,11 @@ static int do_setexpr(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) U_BOOT_CMD( setexpr, 5, 0, do_setexpr, "set environment variable as the result of eval expression", - "[.b, .w, .l] name value1 <op> value2\n" + "[.b, .w, .l] name [*]value1 <op> [*]value2\n" " - set environment variable 'name' to the result of the evaluated\n" " express specified by <op>. <op> can be &, |, ^, +, -, *, /, %\n" - " size argument is only meaningful if value1 and/or value2 are memory addresses" + " size argument is only meaningful if value1 and/or value2 are\n" + " memory addresses (*)\n" + "setexpr[.b, .w, .l] name *value\n" + " - load a memory address into a variable" ); |