ArmPlatformPkg/PrePi: Add support for PrePi module

This module should handle the Pre PI phase before the DXE core is executed when there is no PEI Core support. It declares the required information needed by the DXE core through HOBs. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11949 6f19259b-4bc3-4df7-8a09-765794883524
2011-07-01 11:09:00 +00:00
parent f6eab262f0
commit cd872e401a
11 changed files with 1055 additions and 0 deletions
--- a/ArmPlatformPkg/PrePi/Exception.asm
+++ b/ArmPlatformPkg/PrePi/Exception.asm
@@ -0,0 +1,91 @@
+//
+//  Copyright (c) 2011, ARM Limited. All rights reserved.
+//  
+//  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        
+//  http://opensource.org/licenses/bsd-license.php                                            
+//
+//  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+//  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+//
+//
+
+#include <AsmMacroIoLib.h>
+#include <Base.h>
+#include <AutoGen.h>
+
+  IMPORT  PrePiCommonExceptionEntry
+  EXPORT  PrePiVectorTable
+  
+  PRESERVE8
+  AREA    PrePeiCoreException, CODE, READONLY, CODEALIGN, ALIGN=5
+
+//============================================================
+//Default Exception Handlers
+//============================================================
+//TODO: there should be better way to handle the exceptions during the early stage. At the moment they are spinning in infinite loop
+  
+PrePiVectorTable
+  b _DefaultResetHandler
+  b _DefaultUndefined
+  b _DefaultSWI
+  b _DefaultPrefetchAbort
+  b _DefaultDataAbort
+  b _DefaultReserved
+  b _DefaultIrq
+  b _DefaultFiq
+
+//
+// Default Exception handlers: There is no plan to return from any of these exceptions.
+// No context saving at all.
+//
+_DefaultResetHandler
+   mov  r1, lr
+   cps       #0x13                     ; Switch to SVC for common stack
+   mov  r0, #0
+   blx   PrePiCommonExceptionEntry
+
+_DefaultUndefined
+   sub  r1, LR, #4
+   cps       #0x13                     ; Switch to SVC for common stack
+   mov  r0, #1
+   blx   PrePiCommonExceptionEntry
+
+_DefaultSWI
+   sub  r1, LR, #4
+   cps       #0x13                     ; Switch to SVC for common stack
+   mov  r0, #2
+   blx   PrePiCommonExceptionEntry
+
+_DefaultPrefetchAbort
+   sub  r1, LR, #4
+   cps       #0x13                     ; Switch to SVC for common stack
+   mov  r0, #3
+   blx   PrePiCommonExceptionEntry
+
+_DefaultDataAbort
+   sub  r1, LR, #8
+   cps       #0x13                     ; Switch to SVC for common stack
+   mov  r0, #4
+   blx   PrePiCommonExceptionEntry
+
+_DefaultReserved
+   mov  r1, lr
+   cps       #0x13                     ; Switch to SVC for common stack
+   mov  r0, #5
+   blx   PrePiCommonExceptionEntry
+   
+_DefaultIrq
+   sub  r1, LR, #4
+   cps       #0x13                     ; Switch to SVC for common stack
+   mov  r0, #6
+   blx   PrePiCommonExceptionEntry
+
+_DefaultFiq
+   sub  r1, LR, #4
+   cps       #0x13                     ; Switch to SVC for common stack
+   mov  r0, #7
+   blx   PrePiCommonExceptionEntry
+
+  END