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Diffstat (limited to 'ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S')
-rw-r--r--ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S382
1 files changed, 191 insertions, 191 deletions
diff --git a/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S b/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S
index 96bd68246f..2b439f3331 100644
--- a/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S
+++ b/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S
@@ -1,191 +1,191 @@
-#------------------------------------------------------------------------------
-#
-# Copyright (c) 2008 - 2010, 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.
-#
-#------------------------------------------------------------------------------
-
-.text
-.align 3
-
-GCC_ASM_EXPORT(ExceptionHandlersStart)
-GCC_ASM_EXPORT(ExceptionHandlersEnd)
-GCC_ASM_EXPORT(CommonExceptionEntry)
-GCC_ASM_EXPORT(AsmCommonExceptionEntry)
-GCC_ASM_EXPORT(CommonCExceptionHandler)
-
-ASM_PFX(ExceptionHandlersStart):
-
-ASM_PFX(Reset):
- b ASM_PFX(ResetEntry)
-
-ASM_PFX(UndefinedInstruction):
- b ASM_PFX(UndefinedInstructionEntry)
-
-ASM_PFX(SoftwareInterrupt):
- b ASM_PFX(SoftwareInterruptEntry)
-
-ASM_PFX(PrefetchAbort):
- b ASM_PFX(PrefetchAbortEntry)
-
-ASM_PFX(DataAbort):
- b ASM_PFX(DataAbortEntry)
-
-ASM_PFX(ReservedException):
- b ASM_PFX(ReservedExceptionEntry)
-
-ASM_PFX(Irq):
- b ASM_PFX(IrqEntry)
-
-ASM_PFX(Fiq):
- b ASM_PFX(FiqEntry)
-
-ASM_PFX(ResetEntry):
- srsdb #0x13! @ Store return state on SVC stack
- stmfd SP!,{LR} @ Store the link register for the current mode
- sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
- stmfd SP!,{R0-R12} @ Store the register state
-
- mov R0,#0
- ldr R1,ASM_PFX(CommonExceptionEntry)
- bx R1
-
-ASM_PFX(UndefinedInstructionEntry):
- srsdb #0x13! @ Store return state on SVC stack
- cps #0x13 @ Switch to SVC for common stack
- stmfd SP!,{LR} @ Store the link register for the current mode
- sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
- stmfd SP!,{R0-R12} @ Store the register state
-
- mov r0,#1
- ldr r1,ASM_PFX(CommonExceptionEntry)
- bx r1
-
-ASM_PFX(SoftwareInterruptEntry):
- srsdb #0x13! @ Store return state on SVC stack
- stmfd SP!,{LR} @ Store the link register for the current mode
- sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
- stmfd SP!,{R0-R12} @ Store the register state
-
- mov r0,#2
- ldr r1,ASM_PFX(CommonExceptionEntry)
- bx r1
-
-ASM_PFX(PrefetchAbortEntry):
- sub LR,LR,#4
- srsdb #0x13! @ Store return state on SVC stack
- cps #0x13 @ Switch to SVC for common stack
- stmfd SP!,{LR} @ Store the link register for the current mode
- sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
- stmfd SP!,{R0-R12} @ Store the register state
-
- mov r0,#3
- ldr r1,ASM_PFX(CommonExceptionEntry)
- bx r1
-
-ASM_PFX(DataAbortEntry):
- sub LR,LR,#8
- srsdb #0x13! @ Store return state on SVC stack
- cps #0x13 @ Switch to SVC for common stack
- stmfd SP!,{LR} @ Store the link register for the current mode
- sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
- stmfd SP!,{R0-R12} @ Store the register state
-
- mov r0,#4
- ldr r1,ASM_PFX(CommonExceptionEntry)
- bx r1
-
-ASM_PFX(ReservedExceptionEntry):
- srsdb #0x13! @ Store return state on SVC stack
- cps #0x13 @ Switch to SVC for common stack
- stmfd SP!,{LR} @ Store the link register for the current mode
- sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
- stmfd SP!,{R0-R12} @ Store the register state
-
- mov r0,#5
- ldr r1,ASM_PFX(CommonExceptionEntry)
- bx r1
-
-ASM_PFX(IrqEntry):
- sub LR,LR,#4
- srsdb #0x13! @ Store return state on SVC stack
- cps #0x13 @ Switch to SVC for common stack
- stmfd SP!,{LR} @ Store the link register for the current mode
- sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
- stmfd SP!,{R0-R12} @ Store the register state
-
- mov r0,#6
- ldr r1,ASM_PFX(CommonExceptionEntry)
- bx r1
-
-ASM_PFX(FiqEntry):
- sub LR,LR,#4
- srsdb #0x13! @ Store return state on SVC stack
- cps #0x13 @ Switch to SVC for common stack
- stmfd SP!,{LR} @ Store the link register for the current mode
- sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
- stmfd SP!,{R0-R12} @ Store the register state
-
- mov r0,#7
- ldr r1,ASM_PFX(CommonExceptionEntry)
- bx r1
-
-ASM_PFX(CommonExceptionEntry):
- .byte 0x12
- .byte 0x34
- .byte 0x56
- .byte 0x78
-
-ASM_PFX(ExceptionHandlersEnd):
-
-ASM_PFX(AsmCommonExceptionEntry):
- mrc p15, 0, R1, c6, c0, 2 @ Read IFAR
- str R1, [SP, #0x50] @ Store it in EFI_SYSTEM_CONTEXT_ARM.IFAR
-
- mrc p15, 0, R1, c5, c0, 1 @ Read IFSR
- str R1, [SP, #0x4c] @ Store it in EFI_SYSTEM_CONTEXT_ARM.IFSR
-
- mrc p15, 0, R1, c6, c0, 0 @ Read DFAR
- str R1, [SP, #0x48] @ Store it in EFI_SYSTEM_CONTEXT_ARM.DFAR
-
- mrc p15, 0, R1, c5, c0, 0 @ Read DFSR
- str R1, [SP, #0x44] @ Store it in EFI_SYSTEM_CONTEXT_ARM.DFSR
-
- ldr R1, [SP, #0x5c] @ srsdb saved pre-exception CPSR on the stack
- str R1, [SP, #0x40] @ Store it in EFI_SYSTEM_CONTEXT_ARM.CPSR
- and r1, r1, #0x1f @ Check to see if User or System Mode
- cmp r1, #0x1f
- cmpne r1, #0x10
- add R2, SP, #0x38 @ Store it in EFI_SYSTEM_CONTEXT_ARM.LR
- ldmneed r2, {lr}^ @ User or System mode, use unbanked register
- ldmneed r2, {lr} @ All other modes used banked register
-
- ldr R1, [SP, #0x58] @ PC is the LR pushed by srsdb
- str R1, [SP, #0x3c] @ Store it in EFI_SYSTEM_CONTEXT_ARM.PC
-
- sub R1, SP, #0x60 @ We pused 0x60 bytes on the stack
- str R1, [SP, #0x34] @ Store it in EFI_SYSTEM_CONTEXT_ARM.SP
-
- @ R0 is exception type
- mov R1,SP @ Prepare System Context pointer as an argument for the exception handler
- blx ASM_PFX(CommonCExceptionHandler) @ Call exception handler
-
- ldr R2,[SP,#0x40] @ EFI_SYSTEM_CONTEXT_ARM.CPSR
- str R2,[SP,#0x5c] @ Store it back to srsdb stack slot so it can be restored
-
- ldr R2,[SP,#0x3c] @ EFI_SYSTEM_CONTEXT_ARM.PC
- str R2,[SP,#0x58] @ Store it back to srsdb stack slot so it can be restored
-
- ldmfd SP!,{R0-R12} @ Restore general purpose registers
- @ Exception handler can not change SP or LR as we would blow chunks
-
- add SP,SP,#0x20 @ Clear out the remaining stack space
- ldmfd SP!,{LR} @ restore the link register for this context
- rfefd SP! @ return from exception via srsdb stack slot
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2008 - 2010, 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.
+#
+#------------------------------------------------------------------------------
+
+.text
+.align 3
+
+GCC_ASM_EXPORT(ExceptionHandlersStart)
+GCC_ASM_EXPORT(ExceptionHandlersEnd)
+GCC_ASM_EXPORT(CommonExceptionEntry)
+GCC_ASM_EXPORT(AsmCommonExceptionEntry)
+GCC_ASM_EXPORT(CommonCExceptionHandler)
+
+ASM_PFX(ExceptionHandlersStart):
+
+ASM_PFX(Reset):
+ b ASM_PFX(ResetEntry)
+
+ASM_PFX(UndefinedInstruction):
+ b ASM_PFX(UndefinedInstructionEntry)
+
+ASM_PFX(SoftwareInterrupt):
+ b ASM_PFX(SoftwareInterruptEntry)
+
+ASM_PFX(PrefetchAbort):
+ b ASM_PFX(PrefetchAbortEntry)
+
+ASM_PFX(DataAbort):
+ b ASM_PFX(DataAbortEntry)
+
+ASM_PFX(ReservedException):
+ b ASM_PFX(ReservedExceptionEntry)
+
+ASM_PFX(Irq):
+ b ASM_PFX(IrqEntry)
+
+ASM_PFX(Fiq):
+ b ASM_PFX(FiqEntry)
+
+ASM_PFX(ResetEntry):
+ srsdb #0x13! @ Store return state on SVC stack
+ stmfd SP!,{LR} @ Store the link register for the current mode
+ sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
+ stmfd SP!,{R0-R12} @ Store the register state
+
+ mov R0,#0
+ ldr R1,ASM_PFX(CommonExceptionEntry)
+ bx R1
+
+ASM_PFX(UndefinedInstructionEntry):
+ srsdb #0x13! @ Store return state on SVC stack
+ cps #0x13 @ Switch to SVC for common stack
+ stmfd SP!,{LR} @ Store the link register for the current mode
+ sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
+ stmfd SP!,{R0-R12} @ Store the register state
+
+ mov r0,#1
+ ldr r1,ASM_PFX(CommonExceptionEntry)
+ bx r1
+
+ASM_PFX(SoftwareInterruptEntry):
+ srsdb #0x13! @ Store return state on SVC stack
+ stmfd SP!,{LR} @ Store the link register for the current mode
+ sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
+ stmfd SP!,{R0-R12} @ Store the register state
+
+ mov r0,#2
+ ldr r1,ASM_PFX(CommonExceptionEntry)
+ bx r1
+
+ASM_PFX(PrefetchAbortEntry):
+ sub LR,LR,#4
+ srsdb #0x13! @ Store return state on SVC stack
+ cps #0x13 @ Switch to SVC for common stack
+ stmfd SP!,{LR} @ Store the link register for the current mode
+ sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
+ stmfd SP!,{R0-R12} @ Store the register state
+
+ mov r0,#3
+ ldr r1,ASM_PFX(CommonExceptionEntry)
+ bx r1
+
+ASM_PFX(DataAbortEntry):
+ sub LR,LR,#8
+ srsdb #0x13! @ Store return state on SVC stack
+ cps #0x13 @ Switch to SVC for common stack
+ stmfd SP!,{LR} @ Store the link register for the current mode
+ sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
+ stmfd SP!,{R0-R12} @ Store the register state
+
+ mov r0,#4
+ ldr r1,ASM_PFX(CommonExceptionEntry)
+ bx r1
+
+ASM_PFX(ReservedExceptionEntry):
+ srsdb #0x13! @ Store return state on SVC stack
+ cps #0x13 @ Switch to SVC for common stack
+ stmfd SP!,{LR} @ Store the link register for the current mode
+ sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
+ stmfd SP!,{R0-R12} @ Store the register state
+
+ mov r0,#5
+ ldr r1,ASM_PFX(CommonExceptionEntry)
+ bx r1
+
+ASM_PFX(IrqEntry):
+ sub LR,LR,#4
+ srsdb #0x13! @ Store return state on SVC stack
+ cps #0x13 @ Switch to SVC for common stack
+ stmfd SP!,{LR} @ Store the link register for the current mode
+ sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
+ stmfd SP!,{R0-R12} @ Store the register state
+
+ mov r0,#6
+ ldr r1,ASM_PFX(CommonExceptionEntry)
+ bx r1
+
+ASM_PFX(FiqEntry):
+ sub LR,LR,#4
+ srsdb #0x13! @ Store return state on SVC stack
+ cps #0x13 @ Switch to SVC for common stack
+ stmfd SP!,{LR} @ Store the link register for the current mode
+ sub SP,SP,#0x20 @ Save space for SP, LR, PC, IFAR - CPSR
+ stmfd SP!,{R0-R12} @ Store the register state
+
+ mov r0,#7
+ ldr r1,ASM_PFX(CommonExceptionEntry)
+ bx r1
+
+ASM_PFX(CommonExceptionEntry):
+ .byte 0x12
+ .byte 0x34
+ .byte 0x56
+ .byte 0x78
+
+ASM_PFX(ExceptionHandlersEnd):
+
+ASM_PFX(AsmCommonExceptionEntry):
+ mrc p15, 0, R1, c6, c0, 2 @ Read IFAR
+ str R1, [SP, #0x50] @ Store it in EFI_SYSTEM_CONTEXT_ARM.IFAR
+
+ mrc p15, 0, R1, c5, c0, 1 @ Read IFSR
+ str R1, [SP, #0x4c] @ Store it in EFI_SYSTEM_CONTEXT_ARM.IFSR
+
+ mrc p15, 0, R1, c6, c0, 0 @ Read DFAR
+ str R1, [SP, #0x48] @ Store it in EFI_SYSTEM_CONTEXT_ARM.DFAR
+
+ mrc p15, 0, R1, c5, c0, 0 @ Read DFSR
+ str R1, [SP, #0x44] @ Store it in EFI_SYSTEM_CONTEXT_ARM.DFSR
+
+ ldr R1, [SP, #0x5c] @ srsdb saved pre-exception CPSR on the stack
+ str R1, [SP, #0x40] @ Store it in EFI_SYSTEM_CONTEXT_ARM.CPSR
+ and r1, r1, #0x1f @ Check to see if User or System Mode
+ cmp r1, #0x1f
+ cmpne r1, #0x10
+ add R2, SP, #0x38 @ Store it in EFI_SYSTEM_CONTEXT_ARM.LR
+ ldmneed r2, {lr}^ @ User or System mode, use unbanked register
+ ldmneed r2, {lr} @ All other modes used banked register
+
+ ldr R1, [SP, #0x58] @ PC is the LR pushed by srsdb
+ str R1, [SP, #0x3c] @ Store it in EFI_SYSTEM_CONTEXT_ARM.PC
+
+ sub R1, SP, #0x60 @ We pused 0x60 bytes on the stack
+ str R1, [SP, #0x34] @ Store it in EFI_SYSTEM_CONTEXT_ARM.SP
+
+ @ R0 is exception type
+ mov R1,SP @ Prepare System Context pointer as an argument for the exception handler
+ blx ASM_PFX(CommonCExceptionHandler) @ Call exception handler
+
+ ldr R2,[SP,#0x40] @ EFI_SYSTEM_CONTEXT_ARM.CPSR
+ str R2,[SP,#0x5c] @ Store it back to srsdb stack slot so it can be restored
+
+ ldr R2,[SP,#0x3c] @ EFI_SYSTEM_CONTEXT_ARM.PC
+ str R2,[SP,#0x58] @ Store it back to srsdb stack slot so it can be restored
+
+ ldmfd SP!,{R0-R12} @ Restore general purpose registers
+ @ Exception handler can not change SP or LR as we would blow chunks
+
+ add SP,SP,#0x20 @ Clear out the remaining stack space
+ ldmfd SP!,{LR} @ restore the link register for this context
+ rfefd SP! @ return from exception via srsdb stack slot
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 13:11:06 +0000