Add option to display customised memory information

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>

diff --git a/README b/README
index 9c261680d4d43dcd215d45e28d80741a70fd13eb..a9a92d7f83a30136d60d744b6c9fad9ac06fde0e 100644 (file)
--- a/README
+++ b/README
@@ -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

diff --git a/common/cmd_mem.c b/common/cmd_mem.c
index 4d64cfffde8040bb397f373d52b63fb927f27cee..0f3ffc84ff568f5f8f01c94fd75f316d4d5cc6ad 100644 (file)
--- 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 2f2578bef57792e16d2eb4c8f29daa7131df3b51..4ad17eafb9b89a15975b0b8945a1b70c198d8d88 100644 (file)
--- 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 e82f6421c0af6e2cd91eaf0c88e9fae371f620cf..2a82e19c78cab87fd6bc2bbb731ed72ceb14fa8a 100644 (file)
--- a/include/config_cmd_all.h
+++ b/include/config_cmd_all.h
@@ -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                  */