Add OEM command to request flash size
The BMC flash is `/dev/mtd0` and the size can found in
`/sys/class/mtd/mtd0/size`. This OEM command will request that
information with MTDINFO.
Tested:
Successfully requested the flash size information with ipmitool.
```
cat /sys/class/mtd/mtd0/size
67108864
```
67108864 / 1024 / 1024 = 64MB flash
```
ipmitool raw 0x2e 0x32 0x79 0x2b 0x00 0x09
79 2b 00 09 00 00 00 04
```
Output in little endian.
0x04000000 -> 67108864
Change-Id: Iec1b33503d1166a42ceef4b8491e5c19c3a077fe
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/flash_size.hpp b/flash_size.hpp
new file mode 100644
index 0000000..9cec240
--- /dev/null
+++ b/flash_size.hpp
@@ -0,0 +1,16 @@
+#pragma once
+
+#include "handler.hpp"
+
+#include <ipmid/api.h>
+
+namespace google
+{
+namespace ipmi
+{
+
+ipmi_ret_t getFlashSize(const uint8_t* reqBuf, uint8_t* replyBuf,
+ size_t* dataLen, HandlerInterface* handler);
+
+} // namespace ipmi
+} // namespace google