diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
index e0020f1e2..80157a736 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
@@ -674,6 +674,7 @@ err_reset:
 static int xhci_dcbaa_alloc ( struct xhci_host *xhci ) {
 	size_t len;
 	uintptr_t dcbaap;
+	uint64_t dcbaap_phy;
 	int rc;
 
 	/* Allocate and initialise structure.  Must be at least
@@ -683,6 +684,9 @@ static int xhci_dcbaa_alloc ( struct xhci_host *xhci ) {
 	 */
 	len = ( ( xhci->slots + 1 ) * sizeof ( xhci->dcbaa.context[0] ) );
 	xhci->dcbaa.context = usb_align(xhci_align ( len ), len);
+
+	//
+
 	if ( ! xhci->dcbaa.context ) {
 		USB_LOG_ERR("XHCI %s could not allocate DCBAA\n", xhci->name );
 		rc = -ENOMEM;
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 d701eb935..aead37d00 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
@@ -859,8 +859,12 @@ struct xhci_host {
 	/** USB legacy support capability (if present and enabled) */
 	unsigned int         legacy;
 
-	/** Device context base address array */
-    void                 *phy_acbaa;
+	/* 
+	 * Device context base address array.
+	 *
+	 * dcbaa_addr holds the virtual address of the dcbaa, meanwhile acbaa keeps the value that should be writen to XHCI_OP_DCBAAP. 
+	 */
+    void                 *dcbaa_addr;
 	struct xhci_dcbaa    dcbaa;
 
 	/** Scratchpad buffer */