//\r
Length = (UINTN)ExceptionHandlersEnd - (UINTN)ExceptionHandlersStart;\r
\r
+ // Check if the exception vector is in the low address\r
+ if (PcdGet32 (PcdCpuVectorBaseAddress) == 0x0) {\r
+ // Set SCTLR.V to 0 to enable VBAR to be used\r
+ ArmSetLowVectors ();\r
+ } else {\r
+ ArmSetHighVectors ();\r
+ }\r
+\r
//\r
// Reserve space for the exception handlers\r
//\r
ArmDisableBranchPrediction (
VOID
);
-
+
+VOID
+EFIAPI
+ArmSetLowVectors (
+ VOID
+ );
+
+VOID
+EFIAPI
+ArmSetHighVectors (
+ VOID
+ );
+
VOID
EFIAPI
ArmDataMemoryBarrier (
GCC_ASM_EXPORT (ArmEnableSWPInstruction)
GCC_ASM_EXPORT (ArmEnableBranchPrediction)
GCC_ASM_EXPORT (ArmDisableBranchPrediction)
+GCC_ASM_EXPORT (ArmSetLowVectors)
+GCC_ASM_EXPORT (ArmSetHighVectors)
GCC_ASM_EXPORT (ArmV7AllDataCachesOperation)
GCC_ASM_EXPORT (ArmDataMemoryBarrier)
GCC_ASM_EXPORT (ArmDataSyncronizationBarrier)
isb
bx LR
+ASM_PFX(ArmSetLowVectors):
+ mrc p15, 0, r0, c1, c0, 0 @ Read SCTLR into R0 (Read control register configuration data)
+ bic r0, r0, #0x00002000 @ clear V bit
+ mcr p15, 0, r0, c1, c0, 0 @ Write R0 into SCTLR (Write control register configuration data)
+ isb
+ bx LR
+
+ASM_PFX(ArmSetHighVectors):
+ mrc p15, 0, r0, c1, c0, 0 @ Read SCTLR into R0 (Read control register configuration data)
+ orr r0, r0, #0x00002000 @ clear V bit
+ mcr p15, 0, r0, c1, c0, 0 @ Write R0 into SCTLR (Write control register configuration data)
+ isb
+ bx LR
ASM_PFX(ArmV7AllDataCachesOperation):
stmfd SP!,{r4-r12, LR}
bx lr
ASM_PFX(ArmWriteVBar):
+ # Set the Address of the Vector Table in the VBAR register
mcr p15, 0, r0, c12, c0, 0
+ # Ensure the SCTLR.V bit is clear
+ mrc p15, 0, r0, c1, c0, 0 @ Read SCTLR into R0 (Read control register configuration data)
+ bic r0, r0, #0x00002000 @ clear V bit
+ mcr p15, 0, r0, c1, c0, 0 @ Write R0 into SCTLR (Write control register configuration data)
+ isb
bx lr
ASM_PFX(ArmWriteCPACR):
EXPORT ArmEnableSWPInstruction
EXPORT ArmEnableBranchPrediction
EXPORT ArmDisableBranchPrediction
+ EXPORT ArmSetLowVectors
+ EXPORT ArmSetHighVectors
EXPORT ArmV7AllDataCachesOperation
EXPORT ArmDataMemoryBarrier
EXPORT ArmDataSyncronizationBarrier
isb
bx LR
+ArmSetLowVectors
+ mrc p15, 0, r0, c1, c0, 0 ; Read SCTLR into R0 (Read control register configuration data)
+ bic r0, r0, #0x00002000 ; clear V bit
+ mcr p15, 0, r0, c1, c0, 0 ; Write R0 into SCTLR (Write control register configuration data)
+ isb
+ bx LR
+
+ArmSetHighVectors
+ mrc p15, 0, r0, c1, c0, 0 ; Read SCTLR into R0 (Read control register configuration data)
+ orr r0, r0, #0x00002000 ; clear V bit
+ mcr p15, 0, r0, c1, c0, 0 ; Write R0 into SCTLR (Write control register configuration data)
+ isb
+ bx LR
ArmV7AllDataCachesOperation
stmfd SP!,{r4-r12, LR}
bx lr
ArmWriteVBar
+ // Set the Address of the Vector Table in the VBAR register
mcr p15, 0, r0, c12, c0, 0
+ // Ensure the SCTLR.V bit is clear
+ mrc p15, 0, r0, c1, c0, 0 ; Read SCTLR into R0 (Read control register configuration data)
+ bic r0, r0, #0x00002000 ; clear V bit
+ mcr p15, 0, r0, c1, c0, 0 ; Write R0 into SCTLR (Write control register configuration data)
+ isb
bx lr
ArmReadVBar