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authorJoe Hershberger <joe.hershberger@ni.com>2012-11-01 16:21:14 +0000
committerTom Rini <trini@ti.com>2012-12-19 15:51:57 -0700
commit4823b45da2b5d434b1009f8b511a8fc846c7a252 (patch)
tree3689cb057d408cdabf34cdf9431b4bcbec4ea2ad /common/cmd_setexpr.c
parent2400727318a0a1ecf15a9deae85b0719c4c47aba (diff)
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Add a simple load option to setexpr
Make setexpr accept a 2 parameter variant that will simply load a value into a variable. This is useful for loading a value from memory. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Diffstat (limited to 'common/cmd_setexpr.c')
-rw-r--r--common/cmd_setexpr.c19
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"
);