MdeModulePkg/Usb: Boost the r/w performance by reducing stall time on polling cmd...

[mirror_edk2.git] / MdeModulePkg / Bus / Pci / XhciDxe / Xhci.h

diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h
index ae56b1e6fe49c06ff2ab5d7cd8bd99f20eb6bd97..ada961f61133150cce265023275d4fdf0d1526e5 100644 (file)
--- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h
@@ -2,7 +2,7 @@
 \r
   Provides some data structure definitions used by the XHCI host controller driver.\r
 \r
-Copyright (c) 2011 - 2012, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -41,6 +41,10 @@ typedef struct _USB_DEV_CONTEXT      USB_DEV_CONTEXT;
 #include "XhciSched.h"\r
 #include "ComponentName.h"\r
 \r
+//\r
+// The unit is microsecond, setting it as 1us.\r
+//\r
+#define XHC_1_MICROSECOND            (1)\r
 //\r
 // Convert millisecond to microsecond.\r
 //\r