diff --git a/systemintfcmds.h b/systemintfcmds.h
new file mode 100644
index 0000000..19526f6
--- /dev/null
+++ b/systemintfcmds.h
@@ -0,0 +1,44 @@
+#ifndef __SYSTEM_INTF_CMDS_HANDLER_H__
+#define __SYSTEM_INTF_CMDS_HANDLER_H__
+
+#include <stdint.h>
+
+// These are per skiboot ipmi-sel code
+
+// OEM_SEL type with Timestamp
+#define SEL_OEM_ID_0        0x55
+// SEL type is OEM and -not- general SEL
+#define SEL_RECORD_TYPE_OEM 0xC0
+// Minor command for soft shurdown
+#define SOFT_OFF            0x00
+// Major command for Any kind of power ops
+#define CMD_POWER           0x04
+
+// IPMI commands used via System Interface functions.
+enum ipmi_netfn_system_intf_cmds
+{
+    IPMI_CMD_SET_BMC_GLOBAL_ENABLES = 0x2E,
+    IPMI_CMD_GET_MSG_FLAGS          = 0x31,
+    IPMI_CMD_READ_EVENT             = 0x35,
+};
+
+// A Mechanism to tell host to shtudown hosts by sending this PEM SEL. Really
+// the only used fields by skiboot are:
+// id[0] / id[1] for ID_0 , ID_1
+// type : SEL_RECORD_TYPE_OEM as standard SELs are ignored by skiboot
+// cmd : CMD_POWER for power functions
+// data[0], specific commands.  example Soft power off. power cycle, etc.
+struct oem_sel_timestamped
+{
+    /* SEL header */
+    uint8_t id[2];
+    uint8_t type;
+    uint8_t manuf_id[3];
+    uint8_t timestamp[4];
+    /* OEM SEL data (6 bytes) follows */
+    uint8_t netfun;
+    uint8_t cmd;
+    uint8_t data[4];
+};
+
+#endif