SourceLevelDebugPkg: Use CPU Local APIC timer to handle timeout.

Use CPU Local APIC timer to handle timeout when read data from debug port, instead of the TimerLib in Debug Communication lib instances.
It could remove much duplicated code in Debug Communication Lib instances.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>





git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17089 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 11 insertions, 3 deletions

diff --git a/SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c b/SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c
index 651737e5e7..ac96a00240 100644
--- a/SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c
+++ b/SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c
@@ -1,7 +1,7 @@
 /** @file

   Debug Agent library implementition.

 

-  Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>

   This program and the accompanying materials

   are licensed and made available under the terms and conditions of the BSD License

   which accompanies this distribution.  The full text of the license may be found at

@@ -189,6 +189,7 @@ InitializeDebugAgent (
   UINT16                        IdtEntryCount;

   DEBUG_AGENT_MAILBOX           *Mailbox;

   UINT64                        *MailboxLocation;

+  UINT32                        DebugTimerFrequency;

 

   switch (InitFlag) {

   case DEBUG_AGENT_INIT_SMM:

@@ -236,6 +237,12 @@ InitializeDebugAgent (
     // Initialized Debug Agent

     //

     InitializeDebugIdt ();

+    //

+    // Initialize Debug Timer hardware and save its frequency

+    //

+    InitializeDebugTimer (&DebugTimerFrequency);

+    UpdateMailboxContent (mMailboxPointer, DEBUG_MAILBOX_DEBUG_TIMER_FREQUENCY, DebugTimerFrequency);

+

     DebugPortHandle = (UINT64) (UINTN)DebugPortInitialize ((DEBUG_PORT_HANDLE) (UINTN)Mailbox->DebugPortHandle, NULL);

     UpdateMailboxContent (Mailbox, DEBUG_MAILBOX_DEBUG_PORT_HANDLE_INDEX, DebugPortHandle);

     mMailboxPointer = Mailbox;

@@ -329,9 +336,10 @@ InitializeDebugAgent (
 

       InitializeDebugIdt ();

       //

-      // Initialize Debug Timer hardware and enable interrupt.

+      // Initialize Debug Timer hardware and save its frequency

       //

-      InitializeDebugTimer ();

+      InitializeDebugTimer (&DebugTimerFrequency);

+      UpdateMailboxContent (mMailboxPointer, DEBUG_MAILBOX_DEBUG_TIMER_FREQUENCY, DebugTimerFrequency);

       EnableInterrupts ();

 

       FindAndReportModuleImageInfo (SIZE_4KB);