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Add option to display customised memory information

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Some boards want to report more than just memory size. For example, it
might be useful to display the memory type (DDR2, DDR3) or manufacturer.

Add a weak function to support this requirement, accessed through a new
'meminfo' command.

Any example of the DRAM: output is below, just for illustration:

SMDK5250 # meminfo
DRAM:  2 GiB Elpida DDR3 @ 800MHz

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2012-11-30 13:01:20 +00:00 committed by Albert ARIBAUD
parent e2e3e2b1be
commit 15a33e49de
4 changed files with 38 additions and 0 deletions
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1
README
View File

@ -849,6 +849,7 @@ The following options need to be configured:
CONFIG_CMD_LOADS loads
CONFIG_CMD_MD5SUM print md5 message digest
(requires CONFIG_CMD_MEMORY and CONFIG_MD5)
CONFIG_CMD_MEMINFO * Display detailed memory information
CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base,
loop, loopw, mtest
CONFIG_CMD_MISC Misc functions like sleep etc

27
common/cmd_mem.c
View File

@ -33,6 +33,9 @@
#include <dataflash.h>
#endif
#include <watchdog.h>
#include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR;
static int mod_mem(cmd_tbl_t *, int, int, int, char * const []);
@ -1203,6 +1206,22 @@ U_BOOT_CMD(
#endif
#ifdef CONFIG_CMD_MEMINFO
__weak void board_show_dram(ulong size)
{
puts("DRAM: ");
print_size(size, "\n");
}
static int do_mem_info(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
board_show_dram(gd->ram_size);
return 0;
}
#endif
U_BOOT_CMD(
base, 2, 1, do_mem_base,
"print or set address offset",
@ -1243,3 +1262,11 @@ U_BOOT_CMD(
"[.b, .w, .l] address value delay(ms)"
);
#endif /* CONFIG_MX_CYCLIC */
#ifdef CONFIG_CMD_MEMINFO
U_BOOT_CMD(
meminfo, 3, 1, do_mem_info,
"display memory information",
""
);
#endif

9
include/common.h
View File

@ -311,6 +311,15 @@ int mac_read_from_eeprom(void);
extern u8 _binary_dt_dtb_start[]; /* embedded device tree blob */
int set_cpu_clk_info(void);
/**
* Show the DRAM size in a board-specific way
*
* This is used by boards to display DRAM information in their own way.
*
* @param size Size of DRAM (which should be displayed along with other info)
*/
void board_show_dram(ulong size);
/* common/flash.c */
void flash_perror (int);

1
include/config_cmd_all.h
View File

@ -56,6 +56,7 @@
#define CONFIG_CMD_LICENSE /* console license display */
#define CONFIG_CMD_LOADB /* loadb */
#define CONFIG_CMD_LOADS /* loads */
#define CONFIG_CMD_MEMINFO /* meminfo */
#define CONFIG_CMD_MEMORY /* md mm nm mw cp cmp crc base loop mtest */
#define CONFIG_CMD_MFSL /* FSL support for Microblaze */
#define CONFIG_CMD_MII /* MII support */