[PATCH v6 0/3] Add command for getting ramsize in scripts

[PATCH v6 0/3] Add command for getting ramsize in scripts

[Frank Wunderlich]

From: Frank Wunderlich <frank-w@public-files.de>

Add command for getting ramsize in scripts

v6:
- add missing return for error in env_set_long
v5:
- move msize to meminfo and drop first param (always display as MiB)
- rename msize to memsize
- add doc and test so it becomes a series

Frank Wunderlich (3):
  cmd: mem: add command for getting ram size for use in scripts
  test: cmd: add test for memsize
  doc: cmd: add usage doc for memsize

 cmd/Kconfig               |  7 +++++++
 cmd/meminfo.c             | 25 +++++++++++++++++++++++
 doc/usage/cmd/memsize.rst | 43 +++++++++++++++++++++++++++++++++++++++
 test/cmd/meminfo.c        | 17 ++++++++++++++++
 4 files changed, 92 insertions(+)
 create mode 100644 doc/usage/cmd/memsize.rst

-- 
2.43.0

[PATCH v6 1/3] cmd: mem: add command for getting ram size for use in scripts

[Frank Wunderlich]

From: Frank Wunderlich <frank-w@public-files.de>

Add a command for getting detected ram size with possibility to
assign it to an environment variable.

example usage:

BPI-R4> memsize
4096 MiB
BPI-R4> memsize memsz
BPI-R4> printenv memsz
memsz=4096
BPI-R4>

board with 8GB ram:

BPI-R4> memsize
8192 MiB
BPI-R4> memsize memsz
BPI-R4> printenv memsz
memsz=8192
BPI-R4>

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
v6: add missing return for error in env_set_ulong
v5: move msize to meminfo and drop first param (always display as MiB)
    rename msize to memsize
v4: drop rounding to full MB/GB as it leads to wrong display
v3: add missing ifdefs
v2: add Kconfig entry
---
 cmd/Kconfig   |  6 ++++++
 cmd/meminfo.c | 25 +++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/cmd/Kconfig b/cmd/Kconfig
index 5c611fb3016e..be79bf0747df 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -925,6 +925,12 @@ config CMD_MEMINFO_MAP
 
 	  See doc/usage/cmd/meminfo.rst for more information.
 
+config CMD_MEMSIZE
+	bool "memsize"
+	depends on CMD_MEMINFO
+	help
+	  Get RAM via command for use in scripts.
+
 config CMD_MEMORY
 	bool "md, mm, nm, mw, cp, cmp, base, loop"
 	default y
diff --git a/cmd/meminfo.c b/cmd/meminfo.c
index aa3b5bafe176..e7db9d065f5a 100644
--- a/cmd/meminfo.c
+++ b/cmd/meminfo.c
@@ -8,10 +8,12 @@
 #include <bootstage.h>
 #include <command.h>
 #include <display_options.h>
+#include <env.h>
 #include <lmb.h>
 #include <malloc.h>
 #include <mapmem.h>
 #include <asm/global_data.h>
+#include <linux/sizes.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -98,8 +100,31 @@ static int do_meminfo(struct cmd_tbl *cmdtp, int flag, int argc,
 	return 0;
 }
 
+#ifdef CONFIG_CMD_MEMSIZE
+static int do_mem_size(struct cmd_tbl *cmdtp, int flag, int argc,
+		       char *const argv[])
+{
+	u64 memsize = gd->ram_size / SZ_1M;
+
+	if (argc > 1)
+		return env_set_ulong(argv[1], memsize);
+	else
+		printf("%lld MiB\n", memsize);
+
+	return 0;
+}
+#endif /* CONFIG_CMD_MEMSIZE */
+
 U_BOOT_CMD(
 	meminfo,	1,	1,	do_meminfo,
 	"display memory information",
 	""
 );
+
+#ifdef CONFIG_CMD_MEMSIZE
+U_BOOT_CMD(
+	memsize,	2,	1,	do_mem_size,
+	"get detected ram size in MiB, optional set env variable with value",
+	"[envvar]"
+);
+#endif /* CONFIG_CMD_MEMSIZE */
-- 
2.43.0

[PATCH v6 2/3] test: cmd: add test for memsize

[Frank Wunderlich]

From: Frank Wunderlich <frank-w@public-files.de>

Add a test for memsize command in same way as meminfo.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
tested via:
$ ./u-boot -T -c "ut cmd cmd_test_memsize"
...
Test: memsize: meminfo.c
Tests run: 1, 0 ms, average: 0 ms, failures: 0
---
 cmd/Kconfig        |  1 +
 test/cmd/meminfo.c | 17 +++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/cmd/Kconfig b/cmd/Kconfig
index be79bf0747df..2bafa156ca8a 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -927,6 +927,7 @@ config CMD_MEMINFO_MAP
 
 config CMD_MEMSIZE
 	bool "memsize"
+	default y if SANDBOX
 	depends on CMD_MEMINFO
 	help
 	  Get RAM via command for use in scripts.
diff --git a/test/cmd/meminfo.c b/test/cmd/meminfo.c
index 53b41e3b49e0..ba772a8b7616 100644
--- a/test/cmd/meminfo.c
+++ b/test/cmd/meminfo.c
@@ -7,6 +7,7 @@
  */
 
 #include <dm/test.h>
+#include <env.h>
 #include <test/cmd.h>
 #include <test/ut.h>
 
@@ -39,4 +40,20 @@ static int cmd_test_meminfo(struct unit_test_state *uts)
 
 	return 0;
 }
+
+/* Test 'memsize' command */
+static int cmd_test_memsize(struct unit_test_state *uts)
+{
+	ut_assertok(run_command("memsize", 0));
+	ut_assert_nextline("256 MiB");
+	ut_assert_console_end();
+
+	ut_assertok(run_command("memsize memsz", 0));
+	ut_asserteq_str("256", env_get("memsz"));
+	ut_assert_console_end();
+
+	return 0;
+}
+
 CMD_TEST(cmd_test_meminfo, UTF_CONSOLE);
+CMD_TEST(cmd_test_memsize, UTF_CONSOLE);
-- 
2.43.0

Re: [PATCH v6 2/3] test: cmd: add test for memsize

[Tom Rini]

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On Sun, Jan 25, 2026 at 02:12:52PM +0100, Frank Wunderlich wrote:

> From: Frank Wunderlich <frank-w@public-files.de>
> 
> Add a test for memsize command in same way as meminfo.
> 
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> ---
> tested via:
> $ ./u-boot -T -c "ut cmd cmd_test_memsize"
> ...
> Test: memsize: meminfo.c
> Tests run: 1, 0 ms, average: 0 ms, failures: 0
> ---
>  cmd/Kconfig        |  1 +
>  test/cmd/meminfo.c | 17 +++++++++++++++++
>  2 files changed, 18 insertions(+)
> 
> diff --git a/cmd/Kconfig b/cmd/Kconfig
> index be79bf0747df..2bafa156ca8a 100644
> --- a/cmd/Kconfig
> +++ b/cmd/Kconfig
> @@ -927,6 +927,7 @@ config CMD_MEMINFO_MAP
>  
>  config CMD_MEMSIZE
>  	bool "memsize"
> +	default y if SANDBOX
>  	depends on CMD_MEMINFO
>  	help
>  	  Get RAM via command for use in scripts.
> diff --git a/test/cmd/meminfo.c b/test/cmd/meminfo.c
> index 53b41e3b49e0..ba772a8b7616 100644
> --- a/test/cmd/meminfo.c
> +++ b/test/cmd/meminfo.c
> @@ -7,6 +7,7 @@
>   */
>  
>  #include <dm/test.h>
> +#include <env.h>
>  #include <test/cmd.h>
>  #include <test/ut.h>
>  
> @@ -39,4 +40,20 @@ static int cmd_test_meminfo(struct unit_test_state *uts)
>  
>  	return 0;
>  }
> +
> +/* Test 'memsize' command */
> +static int cmd_test_memsize(struct unit_test_state *uts)
> +{
> +	ut_assertok(run_command("memsize", 0));
> +	ut_assert_nextline("256 MiB");
> +	ut_assert_console_end();
> +
> +	ut_assertok(run_command("memsize memsz", 0));
> +	ut_asserteq_str("256", env_get("memsz"));
> +	ut_assert_console_end();
> +
> +	return 0;
> +}
> +
>  CMD_TEST(cmd_test_meminfo, UTF_CONSOLE);
> +CMD_TEST(cmd_test_memsize, UTF_CONSOLE);

Since the new test isn't guarded with memsize, this fails on qemu-x86_64
where meminfo is enabled, but memsize is not.

-- 
Tom

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Re: [PATCH v6 2/3] test: cmd: add test for memsize

[Frank Wunderlich]

Am 4. Februar 2026 00:34:02 MEZ schrieb Tom Rini <trini@konsulko.com>:
>On Sun, Jan 25, 2026 at 02:12:52PM +0100, Frank Wunderlich wrote:
>
>> From: Frank Wunderlich <frank-w@public-files.de>
>> 
>> Add a test for memsize command in same way as meminfo.
>> 
>> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
>> ---
>> tested via:
>> $ ./u-boot -T -c "ut cmd cmd_test_memsize"
>> ...
>> Test: memsize: meminfo.c
>> Tests run: 1, 0 ms, average: 0 ms, failures: 0
>> ---
>>  cmd/Kconfig        |  1 +
>>  test/cmd/meminfo.c | 17 +++++++++++++++++
>>  2 files changed, 18 insertions(+)
>> 
>> diff --git a/cmd/Kconfig b/cmd/Kconfig
>> index be79bf0747df..2bafa156ca8a 100644
>> --- a/cmd/Kconfig
>> +++ b/cmd/Kconfig
>> @@ -927,6 +927,7 @@ config CMD_MEMINFO_MAP
>>  
>>  config CMD_MEMSIZE
>>  	bool "memsize"
>> +	default y if SANDBOX
>>  	depends on CMD_MEMINFO
>>  	help
>>  	  Get RAM via command for use in scripts.
>> diff --git a/test/cmd/meminfo.c b/test/cmd/meminfo.c
>> index 53b41e3b49e0..ba772a8b7616 100644
>> --- a/test/cmd/meminfo.c
>> +++ b/test/cmd/meminfo.c
>> @@ -7,6 +7,7 @@
>>   */
>>  
>>  #include <dm/test.h>
>> +#include <env.h>
>>  #include <test/cmd.h>
>>  #include <test/ut.h>
>>  
>> @@ -39,4 +40,20 @@ static int cmd_test_meminfo(struct unit_test_state *uts)
>>  
>>  	return 0;
>>  }
>> +
>> +/* Test 'memsize' command */
>> +static int cmd_test_memsize(struct unit_test_state *uts)
>> +{
>> +	ut_assertok(run_command("memsize", 0));
>> +	ut_assert_nextline("256 MiB");
>> +	ut_assert_console_end();
>> +
>> +	ut_assertok(run_command("memsize memsz", 0));
>> +	ut_asserteq_str("256", env_get("memsz"));
>> +	ut_assert_console_end();
>> +
>> +	return 0;
>> +}
>> +
>>  CMD_TEST(cmd_test_meminfo, UTF_CONSOLE);
>> +CMD_TEST(cmd_test_memsize, UTF_CONSOLE);
>
>Since the new test isn't guarded with memsize, this fails on qemu-x86_64
>where meminfo is enabled, but memsize is not.

Does x86_64 test not use SANDBOX? Do i need to enable it somewhere else? Imho it should ve tested also there so guarding just prevents the test. But of course i can add guards for it.


regards Frank

Re: [PATCH v6 2/3] test: cmd: add test for memsize

[Tom Rini]

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On Wed, Feb 04, 2026 at 07:40:05AM +0100, Frank Wunderlich wrote:
> Am 4. Februar 2026 00:34:02 MEZ schrieb Tom Rini <trini@konsulko.com>:
> >On Sun, Jan 25, 2026 at 02:12:52PM +0100, Frank Wunderlich wrote:
> >
> >> From: Frank Wunderlich <frank-w@public-files.de>
> >> 
> >> Add a test for memsize command in same way as meminfo.
> >> 
> >> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> >> ---
> >> tested via:
> >> $ ./u-boot -T -c "ut cmd cmd_test_memsize"
> >> ...
> >> Test: memsize: meminfo.c
> >> Tests run: 1, 0 ms, average: 0 ms, failures: 0
> >> ---
> >>  cmd/Kconfig        |  1 +
> >>  test/cmd/meminfo.c | 17 +++++++++++++++++
> >>  2 files changed, 18 insertions(+)
> >> 
> >> diff --git a/cmd/Kconfig b/cmd/Kconfig
> >> index be79bf0747df..2bafa156ca8a 100644
> >> --- a/cmd/Kconfig
> >> +++ b/cmd/Kconfig
> >> @@ -927,6 +927,7 @@ config CMD_MEMINFO_MAP
> >>  
> >>  config CMD_MEMSIZE
> >>  	bool "memsize"
> >> +	default y if SANDBOX
> >>  	depends on CMD_MEMINFO
> >>  	help
> >>  	  Get RAM via command for use in scripts.
> >> diff --git a/test/cmd/meminfo.c b/test/cmd/meminfo.c
> >> index 53b41e3b49e0..ba772a8b7616 100644
> >> --- a/test/cmd/meminfo.c
> >> +++ b/test/cmd/meminfo.c
> >> @@ -7,6 +7,7 @@
> >>   */
> >>  
> >>  #include <dm/test.h>
> >> +#include <env.h>
> >>  #include <test/cmd.h>
> >>  #include <test/ut.h>
> >>  
> >> @@ -39,4 +40,20 @@ static int cmd_test_meminfo(struct unit_test_state *uts)
> >>  
> >>  	return 0;
> >>  }
> >> +
> >> +/* Test 'memsize' command */
> >> +static int cmd_test_memsize(struct unit_test_state *uts)
> >> +{
> >> +	ut_assertok(run_command("memsize", 0));
> >> +	ut_assert_nextline("256 MiB");
> >> +	ut_assert_console_end();
> >> +
> >> +	ut_assertok(run_command("memsize memsz", 0));
> >> +	ut_asserteq_str("256", env_get("memsz"));
> >> +	ut_assert_console_end();
> >> +
> >> +	return 0;
> >> +}
> >> +
> >>  CMD_TEST(cmd_test_meminfo, UTF_CONSOLE);
> >> +CMD_TEST(cmd_test_memsize, UTF_CONSOLE);
> >
> >Since the new test isn't guarded with memsize, this fails on qemu-x86_64
> >where meminfo is enabled, but memsize is not.
> 
> Does x86_64 test not use SANDBOX? Do i need to enable it somewhere else? Imho it should ve tested also there so guarding just prevents the test. But of course i can add guards for it.

No, it's qemu-x86_64 which is a different board :)

-- 
Tom

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Re: [PATCH v6 2/3] test: cmd: add test for memsize

[Frank Wunderlich]

Am 4. Februar 2026 14:53:38 MEZ schrieb Tom Rini <trini@konsulko.com>:
>On Wed, Feb 04, 2026 at 07:40:05AM +0100, Frank Wunderlich wrote:
>> Am 4. Februar 2026 00:34:02 MEZ schrieb Tom Rini <trini@konsulko.com>:
>> >On Sun, Jan 25, 2026 at 02:12:52PM +0100, Frank Wunderlich wrote:
>> >
>> >> From: Frank Wunderlich <frank-w@public-files.de>
>> >> 
>> >> Add a test for memsize command in same way as meminfo.
>> >> 
>> >> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
>> >> ---
>> >> tested via:
>> >> $ ./u-boot -T -c "ut cmd cmd_test_memsize"
>> >> ...
>> >> Test: memsize: meminfo.c
>> >> Tests run: 1, 0 ms, average: 0 ms, failures: 0
>> >> ---
>> >>  cmd/Kconfig        |  1 +
>> >>  test/cmd/meminfo.c | 17 +++++++++++++++++
>> >>  2 files changed, 18 insertions(+)
>> >> 
>> >> diff --git a/cmd/Kconfig b/cmd/Kconfig
>> >> index be79bf0747df..2bafa156ca8a 100644
>> >> --- a/cmd/Kconfig
>> >> +++ b/cmd/Kconfig
>> >> @@ -927,6 +927,7 @@ config CMD_MEMINFO_MAP
>> >>  
>> >>  config CMD_MEMSIZE
>> >>  	bool "memsize"
>> >> +	default y if SANDBOX
>> >>  	depends on CMD_MEMINFO
>> >>  	help
>> >>  	  Get RAM via command for use in scripts.
>> >> diff --git a/test/cmd/meminfo.c b/test/cmd/meminfo.c
>> >> index 53b41e3b49e0..ba772a8b7616 100644
>> >> --- a/test/cmd/meminfo.c
>> >> +++ b/test/cmd/meminfo.c
>> >> @@ -7,6 +7,7 @@
>> >>   */
>> >>  
>> >>  #include <dm/test.h>
>> >> +#include <env.h>
>> >>  #include <test/cmd.h>
>> >>  #include <test/ut.h>
>> >>  
>> >> @@ -39,4 +40,20 @@ static int cmd_test_meminfo(struct unit_test_state *uts)
>> >>  
>> >>  	return 0;
>> >>  }
>> >> +
>> >> +/* Test 'memsize' command */
>> >> +static int cmd_test_memsize(struct unit_test_state *uts)
>> >> +{
>> >> +	ut_assertok(run_command("memsize", 0));
>> >> +	ut_assert_nextline("256 MiB");
>> >> +	ut_assert_console_end();
>> >> +
>> >> +	ut_assertok(run_command("memsize memsz", 0));
>> >> +	ut_asserteq_str("256", env_get("memsz"));
>> >> +	ut_assert_console_end();
>> >> +
>> >> +	return 0;
>> >> +}
>> >> +
>> >>  CMD_TEST(cmd_test_meminfo, UTF_CONSOLE);
>> >> +CMD_TEST(cmd_test_memsize, UTF_CONSOLE);
>> >
>> >Since the new test isn't guarded with memsize, this fails on qemu-x86_64
>> >where meminfo is enabled, but memsize is not.
>> 
>> Does x86_64 test not use SANDBOX? Do i need to enable it somewhere else? Imho it should ve tested also there so guarding just prevents the test. But of course i can add guards for it.
>
>No, it's qemu-x86_64 which is a different board :)

Ah ok,thought it is a platform test :)
Then i add only config-guards.

Should it send full series with the requested changes (squashed) or an update (afair you have already applied to next/master)?

regards Frank

Re: [PATCH v6 2/3] test: cmd: add test for memsize

[Tom Rini]

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On Wed, Feb 04, 2026 at 03:48:17PM +0100, Frank Wunderlich wrote:
> Am 4. Februar 2026 14:53:38 MEZ schrieb Tom Rini <trini@konsulko.com>:
> >On Wed, Feb 04, 2026 at 07:40:05AM +0100, Frank Wunderlich wrote:
> >> Am 4. Februar 2026 00:34:02 MEZ schrieb Tom Rini <trini@konsulko.com>:
> >> >On Sun, Jan 25, 2026 at 02:12:52PM +0100, Frank Wunderlich wrote:
> >> >
> >> >> From: Frank Wunderlich <frank-w@public-files.de>
> >> >> 
> >> >> Add a test for memsize command in same way as meminfo.
> >> >> 
> >> >> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> >> >> ---
> >> >> tested via:
> >> >> $ ./u-boot -T -c "ut cmd cmd_test_memsize"
> >> >> ...
> >> >> Test: memsize: meminfo.c
> >> >> Tests run: 1, 0 ms, average: 0 ms, failures: 0
> >> >> ---
> >> >>  cmd/Kconfig        |  1 +
> >> >>  test/cmd/meminfo.c | 17 +++++++++++++++++
> >> >>  2 files changed, 18 insertions(+)
> >> >> 
> >> >> diff --git a/cmd/Kconfig b/cmd/Kconfig
> >> >> index be79bf0747df..2bafa156ca8a 100644
> >> >> --- a/cmd/Kconfig
> >> >> +++ b/cmd/Kconfig
> >> >> @@ -927,6 +927,7 @@ config CMD_MEMINFO_MAP
> >> >>  
> >> >>  config CMD_MEMSIZE
> >> >>  	bool "memsize"
> >> >> +	default y if SANDBOX
> >> >>  	depends on CMD_MEMINFO
> >> >>  	help
> >> >>  	  Get RAM via command for use in scripts.
> >> >> diff --git a/test/cmd/meminfo.c b/test/cmd/meminfo.c
> >> >> index 53b41e3b49e0..ba772a8b7616 100644
> >> >> --- a/test/cmd/meminfo.c
> >> >> +++ b/test/cmd/meminfo.c
> >> >> @@ -7,6 +7,7 @@
> >> >>   */
> >> >>  
> >> >>  #include <dm/test.h>
> >> >> +#include <env.h>
> >> >>  #include <test/cmd.h>
> >> >>  #include <test/ut.h>
> >> >>  
> >> >> @@ -39,4 +40,20 @@ static int cmd_test_meminfo(struct unit_test_state *uts)
> >> >>  
> >> >>  	return 0;
> >> >>  }
> >> >> +
> >> >> +/* Test 'memsize' command */
> >> >> +static int cmd_test_memsize(struct unit_test_state *uts)
> >> >> +{
> >> >> +	ut_assertok(run_command("memsize", 0));
> >> >> +	ut_assert_nextline("256 MiB");
> >> >> +	ut_assert_console_end();
> >> >> +
> >> >> +	ut_assertok(run_command("memsize memsz", 0));
> >> >> +	ut_asserteq_str("256", env_get("memsz"));
> >> >> +	ut_assert_console_end();
> >> >> +
> >> >> +	return 0;
> >> >> +}
> >> >> +
> >> >>  CMD_TEST(cmd_test_meminfo, UTF_CONSOLE);
> >> >> +CMD_TEST(cmd_test_memsize, UTF_CONSOLE);
> >> >
> >> >Since the new test isn't guarded with memsize, this fails on qemu-x86_64
> >> >where meminfo is enabled, but memsize is not.
> >> 
> >> Does x86_64 test not use SANDBOX? Do i need to enable it somewhere else? Imho it should ve tested also there so guarding just prevents the test. But of course i can add guards for it.
> >
> >No, it's qemu-x86_64 which is a different board :)
> 
> Ah ok,thought it is a platform test :)
> Then i add only config-guards.
> 
> Should it send full series with the requested changes (squashed) or an update (afair you have already applied to next/master)?

Please send a v7 that include this fix in this patch, I didn't apply it
to master because it caused CI to fail :)

-- 
Tom

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[PATCH v6 3/3] doc: cmd: add usage doc for memsize

[Frank Wunderlich]

From: Frank Wunderlich <frank-w@public-files.de>

Add documentation for memsize command.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
 doc/usage/cmd/memsize.rst | 43 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 doc/usage/cmd/memsize.rst

diff --git a/doc/usage/cmd/memsize.rst b/doc/usage/cmd/memsize.rst
new file mode 100644
index 000000000000..4571795c7b41
--- /dev/null
+++ b/doc/usage/cmd/memsize.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GPL-2.0+:
+
+.. index::
+   single: memsize (command)
+
+memsize command
+===============
+
+Synopsis
+--------
+
+::
+
+    memsize [name]
+
+Description
+-----------
+
+The memsize command shows the amount of memory in MiB.
+Optionally value can be assigned to an environment variable.
+
+Examples
+--------
+
+This first example shows printing of ram size:
+
+::
+
+  => memsize
+  8192 MiB
+
+This second example shows assign ram size to environment variable:
+
+::
+
+  => memsize memsz
+  => printenv memsz
+  memsz=8192
+
+Return value
+------------
+
+The return value is always 0 except error happens on setting environment variable.
-- 
2.43.0