diff --git a/paw/stos/head/hal/kpcr.h b/paw/stos/head/hal/kpcr.h
new file mode 100644
index 0000000..8c81149
--- /dev/null
+++ b/paw/stos/head/hal/kpcr.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description:  Kernel processor control region
+ * Author:       Chloe M.
+ */
+
+#ifndef _HAL_KPCR_H_
+#define _HAL_KPCR_H_ 1
+
+#include <stdef.h>
+
+/*
+ * The kernel processor control region contains MI
+ * information about the processor.
+ *
+ * @CoreId:  Processor core ID assigned by us
+ */
+typedef struct {
+    USHORT CoreId;
+} KPCR;
+
+#endif  /* !_HAL_KPCR_H_ */