UefiCpuPkg/CpuDxe: introduce ResetApStackless()

If timeout expires before AP returns from Procedure, the AP should
be terminated, we introduce ResetApStackLess() to send init IPI
to let AP exit Procedurce and re-available.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16366 6f19259b-4bc3-4df7-8a09-765794883524

UefiCpuPkg/CpuDxe/CpuMp.h

@@ -99,6 +99,7 @@ typedef struct {
   EFI_EVENT                      WaitEvent;
   BOOLEAN                        TimeoutActive;
   EFI_EVENT                      CheckThisAPEvent;
+  VOID                           *TopOfStack;
 } CPU_DATA_BLOCK;
 
 /**
@@ -622,5 +623,19 @@ FreeApStartupCode (
   VOID
   );
 
+/**
+  Resets the Application Processor and directs it to jump to the
+  specified routine.
+
+  The processor jumps to this code in flat mode, but the processor's
+  stack is not initialized.
+
+  @param ProcessorId           the AP of ProcessorId was reset
+**/
+VOID
+ResetApStackless (
+  IN UINT32 ProcessorId
+  );
+
 #endif // _CPU_MP_H_