OvmfPkg: save on I/O port accesses when the debug port is not in use

[mirror_edk2.git] / OvmfPkg / Library / PlatformDebugLibIoPort / DebugLibDetectRom.c

diff --git a/OvmfPkg/Library/PlatformDebugLibIoPort/DebugLibDetectRom.c b/OvmfPkg/Library/PlatformDebugLibIoPort/DebugLibDetectRom.c
index 83a118a0f78f260ad39b5e018a624ec452de82dd..b950919675d3d67e809a1f29840cad32a046a920 100644 (file)
--- a/OvmfPkg/Library/PlatformDebugLibIoPort/DebugLibDetectRom.c
+++ b/OvmfPkg/Library/PlatformDebugLibIoPort/DebugLibDetectRom.c
@@ -1,6 +1,6 @@
 /** @file\r
-  Constructor code for QEMU debug port library.\r
-  SEC instance.\r
+  Detection code for QEMU debug port.\r
+  SEC instance, cannot cache the result of detection.\r
 \r
   Copyright (c) 2017, Red Hat, Inc.<BR>\r
   This program and the accompanying materials\r
@@ -14,6 +14,7 @@
 **/\r
 \r
 #include <Base.h>\r
+#include "DebugLibDetect.h"\r
 \r
 /**\r
   This constructor function does not have anything to do.\r
@@ -29,3 +30,19 @@ PlatformRomDebugLibIoPortConstructor (
 {\r
   return RETURN_SUCCESS;\r
 }\r
+\r
+/**\r
+  Return the result of detecting the debug I/O port device.\r
+\r
+  @retval TRUE   if the debug I/O port device was detected.\r
+  @retval FALSE  otherwise\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+PlatformDebugLibIoPortFound (\r
+  VOID\r
+  )\r
+{\r
+  return PlatformDebugLibIoPortDetect ();\r
+}\r