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 --- Changes in v2: - Rewrite customised memory info patch to use a command
README | 1 + common/cmd_mem.c | 27 +++++++++++++++++++++++++++ include/common.h | 9 +++++++++ include/config_cmd_all.h | 1 + 4 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/README b/README index 36853e5..200edf8 100644 --- a/README +++ b/README @@ -840,6 +840,7 @@ 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 diff --git a/common/cmd_mem.c b/common/cmd_mem.c index 4d64cff..0f3ffc8 100644 --- a/common/cmd_mem.c +++ b/common/cmd_mem.c @@ -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 diff --git a/include/common.h b/include/common.h index 5e3c5ee..a1ab4f0 100644 --- a/include/common.h +++ b/include/common.h @@ -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);
diff --git a/include/config_cmd_all.h b/include/config_cmd_all.h index f434cd0..eadc8b7 100644 --- a/include/config_cmd_all.h +++ b/include/config_cmd_all.h @@ -53,6 +53,7 @@ #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 */