[PATCH 1/6] UefiCpuPkg/DxeMpInitLib: Support source debugging on AP function

[Jeff Fan <jeff.fan@intel.com>]

The current DxeDebugAgentLib supports source debugging on AP function. This
update is to update DxeMpInitLib to consume Debug Agent Library by
DEBUG_AGENT_INIT_DXE_AP flag. Thus, we could source debugging AP function
invoked by CPU MP Protocol.

However, current SecPeiDebugAgentLib does not support source debugging on AP
function invoked by CPU MP PPI. I have submitted one bugzilla to add this
support at https://bugzilla.tianocore.org/show_bug.cgi?id=308.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Kinney, Michael D <michael.d.kinney@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
---
 UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf |  2 ++
 UefiCpuPkg/Library/MpInitLib/DxeMpLib.c       | 16 ++++++++++++++++
 UefiCpuPkg/Library/MpInitLib/MpLib.c          |  4 ++++
 UefiCpuPkg/Library/MpInitLib/MpLib.h          |  9 +++++++++
 UefiCpuPkg/Library/MpInitLib/PeiMpLib.c       | 12 ++++++++++++
 5 files changed, 43 insertions(+)

diff --git a/UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf b/UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
index 11b2301..cc4f2e9 100644
--- a/UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
+++ b/UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
@@ -43,6 +43,7 @@
 
 [Packages]
   MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
   UefiCpuPkg/UefiCpuPkg.dec
 
 [LibraryClasses]
@@ -54,6 +55,7 @@
   CpuLib
   UefiCpuLib
   UefiBootServicesTableLib
+  DebugAgentLib
 
 [Guids]
   gEfiEventExitBootServicesGuid                 ## CONSUMES  ## Event
diff --git a/UefiCpuPkg/Library/MpInitLib/DxeMpLib.c b/UefiCpuPkg/Library/MpInitLib/DxeMpLib.c
index e75c269..1204abd 100644
--- a/UefiCpuPkg/Library/MpInitLib/DxeMpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/DxeMpLib.c
@@ -16,6 +16,7 @@
 
 #include <Library/UefiLib.h>
 #include <Library/UefiBootServicesTableLib.h>
+#include <Library/DebugAgentLib.h>
 
 #define  AP_CHECK_INTERVAL     (EFI_TIMER_PERIOD_MILLISECONDS (100))
 #define  AP_SAFE_STACK_SIZE    128
@@ -30,6 +31,21 @@ UINTN            mReservedTopOfApStack;
 volatile UINT32  mNumberToFinish = 0;
 
 /**
+  Enable Debug Agent to support source debugging on AP function.
+
+**/
+VOID
+EnableDebugAgent (
+  VOID
+  )
+{
+  //
+  // Initialize Debug Agent to support source level debug in DXE phase
+  //
+  InitializeDebugAgent (DEBUG_AGENT_INIT_DXE_AP, NULL, NULL);
+}
+
+/**
   Get the pointer to CPU MP Data structure.
 
   @return  The pointer to CPU MP Data structure.
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 0495b0f..a21a980 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -539,6 +539,10 @@ ApWakeupFunction (
         if (Procedure != NULL) {
           SetApState (&CpuMpData->CpuData[ProcessorNumber], CpuStateBusy);
           //
+          // Enable source debugging on AP function
+          //         
+          EnableDebugAgent ();
+          //
           // Invoke AP function here
           //
           Procedure (Parameter);
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.h b/UefiCpuPkg/Library/MpInitLib/MpLib.h
index 9861a5c..b67ea9d 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.h
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h
@@ -575,5 +575,14 @@ RestoreWakeupBuffer(
   IN CPU_MP_DATA              *CpuMpData
   );
 
+/**
+  Enable Debug Agent to support source debugging on AP function.
+
+**/
+VOID
+EnableDebugAgent (
+  VOID
+  );
+
 #endif
 
diff --git a/UefiCpuPkg/Library/MpInitLib/PeiMpLib.c b/UefiCpuPkg/Library/MpInitLib/PeiMpLib.c
index a4166a4..fb1d48f 100644
--- a/UefiCpuPkg/Library/MpInitLib/PeiMpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/PeiMpLib.c
@@ -25,6 +25,18 @@ GLOBAL_REMOVE_IF_UNREFERENCED EFI_PEI_NOTIFY_DESCRIPTOR mMpInitLibNotifyList = {
   CpuMpEndOfPeiCallback
 };
 
+
+/**
+  Enable Debug Agent to support source debugging on AP function.
+
+**/
+VOID
+EnableDebugAgent (
+  VOID
+  )
+{
+}
+
 /**
   Get pointer to CPU MP Data structure.
 
-- 
2.9.3.windows.2