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

1 files changed, 102 insertions, 0 deletions

diff --git a/ArmPlatformPkg/PrePi/Exception.S b/ArmPlatformPkg/PrePi/Exception.S
new file mode 100755
index 0000000000..628793e031
--- /dev/null
+++ b/ArmPlatformPkg/PrePi/Exception.S
@@ -0,0 +1,102 @@
+//
+//  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>
+
+#start of the code section
+.text
+.align 5
+
+# IMPORT
+GCC_ASM_IMPORT(PrePiCommonExceptionEntry)
+
+# EXPORT
+GCC_ASM_EXPORT(PrePiVectorTable)
+
+//============================================================
+//Default Exception Handlers
+//============================================================
+  
+  
+ASM_PFX(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
+  # Switch to SVC for common stack
+  cps  #0x13
+  mov  r0, #0
+   blx   ASM_PFX(PrePiCommonExceptionEntry)
+
+_DefaultUndefined:
+  sub  r1, LR, #4
+  # Switch to SVC for common stack
+  cps  #0x13
+  mov  r0, #1
+   blx   ASM_PFX(PrePiCommonExceptionEntry)
+
+_DefaultSWI:
+  sub  r1, LR, #4
+  # Switch to SVC for common stack
+  cps  #0x13
+  mov  r0, #2
+   blx   ASM_PFX(PrePiCommonExceptionEntry)
+
+_DefaultPrefetchAbort:
+  sub  r1, LR, #4
+  # Switch to SVC for common stack
+  cps  #0x13
+  mov  r0, #3
+   blx   ASM_PFX(PrePiCommonExceptionEntry)
+
+_DefaultDataAbort:
+  sub  r1, LR, #8
+  # Switch to SVC for common stack
+  cps  #0x13
+  mov  r0, #4
+   blx   ASM_PFX(PrePiCommonExceptionEntry)
+
+_DefaultReserved:
+  mov  r1, lr
+  # Switch to SVC for common stack
+  cps  #0x13
+  mov  r0, #5
+   blx   ASM_PFX(PrePiCommonExceptionEntry)
+
+_DefaultIrq:
+  sub  r1, LR, #4
+  # Switch to SVC for common stack
+  cps  #0x13
+  mov  r0, #6
+   blx   ASM_PFX(PrePiCommonExceptionEntry)
+
+_DefaultFiq:
+  sub  r1, LR, #4
+  # Switch to SVC for common stack
+  cps  #0x13
+  mov  r0, #7
+   blx   ASM_PFX(PrePiCommonExceptionEntry)
+