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 <s...@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 */
--
1.7.7.3
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