UefiCpuPkg/MpInitLib: Add MP_ASSEMBLY_ADDRESS_MAP

In MpInitLibInitialize(), invoke AsmGetAddress() to get get assembly functions'
entry addresses and the sizes from returned MP_ASSEMBLY_ADDRESS_MAP structure.

v5:
  1. Add more detailed comments for structure MP_ASSEMBLY_ADDRESS_MAP.

v4:
  1. Add AsmRelocateApLoop information return in AsmGetAddress().

v3:
  1. Rename AsmRellocateApLoop to AsmRelocateApLoop.

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>

UefiCpuPkg/Library/MpInitLib/MpLib.h

@@ -35,6 +35,18 @@
 #include <Library/MtrrLib.h>
 #include <Library/HobLib.h>
 
+//
+// AP reset code information including code address and size,
+// this structure will be shared be C code and assembly code.
+// It is natural aligned by design.
+//
+typedef struct {
+  UINT8             *RendezvousFunnelAddress;
+  UINTN             ModeEntryOffset;
+  UINTN             RendezvousFunnelSize;
+  UINT8             *RelocateApLoopFuncAddress;
+  UINTN             RelocateApLoopFuncSize;
+} MP_ASSEMBLY_ADDRESS_MAP;
 
 #pragma pack(1)
 
@@ -81,5 +93,18 @@ VOID
   IN UINTN                   ApTargetCState,
   IN UINTN                   PmCodeSegment
   );
+
+/**
+  Assembly code to get starting address and size of the rendezvous entry for APs.
+  Information for fixing a jump instruction in the code is also returned.
+
+  @param[out] AddressMap  Output buffer for address map information.
+**/
+VOID
+EFIAPI
+AsmGetAddressMap (
+  OUT MP_ASSEMBLY_ADDRESS_MAP    *AddressMap
+  );
+
 #endif