Files
system76-edk2/ArmPlatformPkg/PrePi/Exception.asm
oliviermartin cd872e401a 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

92 lines
2.6 KiB
NASM

//
// 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