"Das U-Boot" Source Tree
cmd: mem: add command for getting ram size for use in scripts
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>
authored by
Frank Wunderlich
and committed by
Tom Rini
e202eca1
6b2d0574
+32
+7
cmd/Kconfig
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cmd/Kconfig
···
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See doc/usage/cmd/meminfo.rst for more information.
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config CMD_MEMSIZE
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bool "memsize"
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depends on CMD_MEMINFO
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help
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Get RAM via command for use in scripts. Print or assign decimal value
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in MiB to environment variable.
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config CMD_MEMORY
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bool "md, mm, nm, mw, cp, cmp, base, loop"
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default y
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cmd/meminfo.c
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cmd/meminfo.c
···
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#include <bootstage.h>
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#include <command.h>
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#include <display_options.h>
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#include <env.h>
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#include <lmb.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <asm/global_data.h>
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#include <linux/sizes.h>
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DECLARE_GLOBAL_DATA_PTR;
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···
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return 0;
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}
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#ifdef CONFIG_CMD_MEMSIZE
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static int do_mem_size(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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u64 memsize = gd->ram_size / SZ_1M;
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if (argc > 1)
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return env_set_ulong(argv[1], memsize);
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else
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printf("%lld MiB\n", memsize);
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return 0;
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}
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#endif /* CONFIG_CMD_MEMSIZE */
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U_BOOT_CMD(
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meminfo, 1, 1, do_meminfo,
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"display memory information",
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""
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);
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#ifdef CONFIG_CMD_MEMSIZE
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U_BOOT_CMD(
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memsize, 2, 1, do_mem_size,
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"get detected ram size in MiB, optional set env variable with value",
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"[envvar]"
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);
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#endif /* CONFIG_CMD_MEMSIZE */