From: Frank Wunderlich <[email protected]> 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 <[email protected]> --- 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..a4e951881ba0 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) + 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
