From 81c7803cf4a49ca2633c706b7630c1cf2d9e9b55 Mon Sep 17 00:00:00 2001
From: klu2 <klu2@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Tue, 9 Oct 2007 08:16:53 +0000
Subject: PI Enabling: the address of PeiServices Pointer should be 1) Set to
 preceding of IDT table in PeiCore's entry 2) Migrate to preceding of new
 memory IDT table when memory is discovery

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4059 6f19259b-4bc3-4df7-8a09-765794883524
---
 .../PeiServicesTablePointer.c                       | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'MdePkg/Library/PeiServicesTablePointerLib')

diff --git a/MdePkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c b/MdePkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
index 54a500a732..871e52a25a 100644
--- a/MdePkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
+++ b/MdePkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
@@ -20,6 +20,12 @@
 
 static EFI_PEI_SERVICES  **gPeiServices;
 
+/**
+  The function set the pointer of PEI services immediately preceding the IDT table
+  according to PI specification.
+  
+  @param    PeiServices   The address of PeiServices pointer.
+**/
 VOID
 EFIAPI
 SetPeiServicesTablePointer (
@@ -70,3 +76,18 @@ PeiServicesTablePointerLibConstructor (
   gPeiServices = PeiServices;
   return EFI_SUCCESS;
 }
+
+/**
+  After memory initialization in PEI phase, the IDT table in temporary memory should 
+  be migrated to memory, and the address of PeiServicesPointer also need to be updated  
+  immediately preceding the new IDT table.
+  
+  @param    PeiServices   The address of PeiServices pointer.
+**/
+VOID
+MigrateIdtTable (
+  IN EFI_PEI_SERVICES  **PeiServices
+  )
+{
+}
+
-- 
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