diff options
Diffstat (limited to 'ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S')
| -rw-r--r-- | ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S b/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S index 2b439f3331..c82618aa1b 100644 --- a/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S +++ b/ArmPkg/Drivers/CpuDxe/ArmV4/ExceptionSupport.S @@ -1,4 +1,4 @@ -#------------------------------------------------------------------------------
+#------------------------------------------------------------------------------
#
# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
#
@@ -52,7 +52,7 @@ ASM_PFX(ResetEntry): 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
@@ -147,18 +147,18 @@ 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
-
+ 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
+
+ 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
@@ -167,25 +167,25 @@ ASM_PFX(AsmCommonExceptionEntry): 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
+ 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
+
+ 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
+
+ @ 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
+ 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
+ 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
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