diff --git a/include/biccommands.hpp b/include/biccommands.hpp
index dfce3a4..8466692 100644
--- a/include/biccommands.hpp
+++ b/include/biccommands.hpp
@@ -1,3 +1,5 @@
+#include <phosphor-logging/lg2.hpp>
+
 #include <cstdint>
 
 enum class fb_bic_cmds : uint8_t
@@ -8,6 +10,7 @@
     CMD_OEM_SET_HOST_POWER_STATE = 0x0C,
     CMD_OEM_GET_FLASH_SIZE = 0x19,
     CMD_OEM_CLEAR_CMOS = 0x25,
+    CMD_OEM_1S_4BYTE_POST_BUF = 0x33,
 };
 
 // Flash size response length
diff --git a/include/types.hpp b/include/types.hpp
new file mode 100644
index 0000000..f6c0076
--- /dev/null
+++ b/include/types.hpp
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <iostream>
+#include <variant>
+#include <vector>
+
+namespace ipmi
+{
+
+constexpr size_t amdFourBytesPostCode = 4;
+
+namespace dimm
+{
+using hostId = size_t;
+struct dimmLoop
+{
+    size_t totalErrorCount;
+    bool gotPattern;  // It gets the whole pattern success.
+    bool startDetect; // Dimm loop detection to use. After getting the anchor
+                      // tag start to detected.
+    std::vector<std::vector<uint8_t>> postCode;
+};
+} // namespace dimm
+} // namespace ipmi