diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.h b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.h
index 0d8bff14f..d701eb935 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.h
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.h
@@ -813,16 +813,27 @@ struct xhci_host {
 	char           		 name[4];
 
     /* xhci registers base addr */
+	/*
+	 * base, cap, op, run and db are pointed to their according physical address. However, the user-space driver can not access physical
+	 * address directly. So we add these data members: base_addr, cap_addr, op_addr, run_addr and ad_addr, and bind them to the according
+	 * physical address.
+	 */
     /** Registers base */
     void                 *base;
+	void                 *base_addr;
 	/** Capability registers */
 	void                 *cap;
+	void                 *cap_addr;
+
 	/** Operational registers */
 	void                 *op;
+	void                 *op_addr;
 	/** Runtime registers */
 	void                 *run;
+	void                 *run_addr;
 	/** Doorbell registers */
 	void                 *db;
+	void                 *db_addr;
     /** extended capability */
     unsigned int         xecp;
     /** capability cache */