diff options
Diffstat (limited to 'ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.asm')
| -rw-r--r-- | ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.asm | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.asm b/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.asm deleted file mode 100644 index 9f09a0bc76..0000000000 --- a/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.asm +++ /dev/null @@ -1,152 +0,0 @@ -//------------------------------------------------------------------------------
-//
-// Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
-//
-// 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.
-//
-//------------------------------------------------------------------------------
-
- EXPORT ExceptionHandlersStart
- EXPORT ExceptionHandlersEnd
- EXPORT CommonExceptionEntry
- EXPORT AsmCommonExceptionEntry
- IMPORT CommonCExceptionHandler
-
- PRESERVE8
- AREA DxeExceptionHandlers, CODE, READONLY
-
-ExceptionHandlersStart
-
-Reset
- b ResetEntry
-
-UndefinedInstruction
- b UndefinedInstructionEntry
-
-SoftwareInterrupt
- b SoftwareInterruptEntry
-
-PrefetchAbort
- b PrefetchAbortEntry
-
-DataAbort
- b DataAbortEntry
-
-ReservedException
- b ReservedExceptionEntry
-
-Irq
- b IrqEntry
-
-Fiq
- b FiqEntry
-
-ResetEntry
- stmfd SP!,{R0-R1}
- mov R0,#0
- ldr R1,CommonExceptionEntry
- bx R1
-
-UndefinedInstructionEntry
- stmfd SP!,{R0-R1}
- mov R0,#1
- ldr R1,CommonExceptionEntry
- bx R1
-
-SoftwareInterruptEntry
- stmfd SP!,{R0-R1}
- mov R0,#2
- ldr R1,CommonExceptionEntry
- bx R1
-
-PrefetchAbortEntry
- stmfd SP!,{R0-R1}
- mov R0,#3
- SUB LR,LR,#4
- ldr R1,CommonExceptionEntry
- bx R1
-
-DataAbortEntry
- stmfd SP!,{R0-R1}
- mov R0,#4
- SUB LR,LR,#8
- ldr R1,CommonExceptionEntry
- bx R1
-
-ReservedExceptionEntry
- stmfd SP!,{R0-R1}
- mov R0,#5
- ldr R1,CommonExceptionEntry
- bx R1
-
-IrqEntry
- stmfd SP!,{R0-R1}
- mov R0,#6
- SUB LR,LR,#4
- ldr R1,CommonExceptionEntry
- bx R1
-
-FiqEntry
- stmfd SP!,{R0-R1}
- mov R0,#7
- SUB LR,LR,#4
- ldr R1,CommonExceptionEntry
- bx R1
-
-CommonExceptionEntry
- dcd 0x12345678
-
-ExceptionHandlersEnd
-
-AsmCommonExceptionEntry
- mrc p15, 0, r1, c6, c0, 2 ; Read IFAR
- stmfd SP!,{R1} ; Store the IFAR
-
- mrc p15, 0, r1, c5, c0, 1 ; Read IFSR
- stmfd SP!,{R1} ; Store the IFSR
-
- mrc p15, 0, r1, c6, c0, 0 ; Read DFAR
- stmfd SP!,{R1} ; Store the DFAR
-
- mrc p15, 0, r1, c5, c0, 0 ; Read DFSR
- stmfd SP!,{R1} ; Store the DFSR
-
- mrs R1,SPSR ; Read SPSR (which is the pre-exception CPSR)
- stmfd SP!,{R1} ; Store the SPSR
-
- stmfd SP!,{LR} ; Store the link register (which is the pre-exception PC)
- stmfd SP,{SP,LR}^ ; Store user/system mode stack pointer and link register
- nop ; Required by ARM architecture
- SUB SP,SP,#0x08 ; Adjust stack pointer
- stmfd SP!,{R2-R12} ; Store general purpose registers
-
- ldr R3,[SP,#0x50] ; Read saved R1 from the stack (it was saved by the exception entry routine)
- ldr R2,[SP,#0x4C] ; Read saved R0 from the stack (it was saved by the exception entry routine)
- stmfd SP!,{R2-R3} ; Store general purpose registers R0 and R1
-
- mov R1,SP ; Prepare System Context pointer as an argument for the exception handler
-
- sub SP,SP,#4 ; Adjust SP to preserve 8-byte alignment
- blx CommonCExceptionHandler ; Call exception handler
- add SP,SP,#4 ; Adjust SP back to where we were
-
- ldr R2,[SP,#0x40] ; Load CPSR from context, in case it has changed
- MSR SPSR_cxsf,R2 ; Store it back to the SPSR to be restored when exiting this handler
-
- ldmfd SP!,{R0-R12} ; Restore general purpose registers
- ldm SP,{SP,LR}^ ; Restore user/system mode stack pointer and link register
- nop ; Required by ARM architecture
- add SP,SP,#0x08 ; Adjust stack pointer
- ldmfd SP!,{LR} ; Restore the link register (which is the pre-exception PC)
- add SP,SP,#0x1C ; Clear out the remaining stack space
- movs PC,LR ; Return from exception
-
- END
-
-
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