This command allows you to read the value of a memory address and store
it in an environment variable.
Signed-off-by: Joe Hershberger <joe.hershber...@ni.com>
---
common/cmd_mem.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/common/cmd_mem.c b/common/cmd_mem.c
index 18f0a3f..08c7d69 100644
--- a/common/cmd_mem.c
+++ b/common/cmd_mem.c
@@ -32,6 +32,7 @@
#ifdef CONFIG_HAS_DATAFLASH
#include <dataflash.h>
#endif
+#include <asm/io.h>
#include <watchdog.h>
static int mod_mem(cmd_tbl_t *, int, int, int, char * const []);
@@ -147,6 +148,45 @@ int do_mem_md ( cmd_tbl_t *cmdtp, int flag, int argc, char
* const argv[])
return (rc);
}
+#ifdef CONFIG_CMD_MEM_GET
+int do_mem_mg(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ ulong addr;
+ int size;
+ char *var;
+ char buf[11];
+
+ if (argc < 3)
+ return CMD_RET_USAGE;
+
+ /* Check for a size specification.
+ * Defaults to long if no or incorrect specification.
+ */
+ size = cmd_get_data_size(argv[0], 4);
+ if (size < 0)
+ return 1;
+
+ var = argv[1];
+
+ addr = simple_strtoul(argv[2], NULL, 16);
+ addr += base_address;
+
+ if (size == 4) {
+ uint32_t value = readl(addr);
+ sprintf(buf, "0x%08x", value);
+ } else if (size == 2) {
+ uint16_t value = readw(addr);
+ sprintf(buf, "0x%04x", value);
+ } else {
+ uint8_t value = readb(addr);
+ sprintf(buf, "0x%02x", value);
+ }
+ setenv(var, buf);
+
+ return 0;
+}
+#endif
+
int do_mem_mm ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
return mod_mem (cmdtp, 1, flag, argc, argv);
@@ -1145,6 +1185,13 @@ U_BOOT_CMD(
"[.b, .w, .l] address [# of objects]"
);
+#ifdef CONFIG_CMD_MEM_GET
+U_BOOT_CMD(
+ mg, 3, 1, do_mem_mg,
+ "memory get",
+ "[.b, .w, .l] variable address"
+);
+#endif
U_BOOT_CMD(
mm, 2, 1, do_mem_mm,
--
1.7.11.5
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