C++ (Cpp) ArmWriteHcr Examples

Example #1

File: AArch64Exception.c Project: MattDevo/edk2

RETURN_STATUS ArchVectorConfig(
  IN  UINTN       VectorBaseAddress
  )
{
  UINTN             HcrReg;
  UINT8             *Stack;

  Stack = AllocatePages (EL0_STACK_PAGES);
  if (Stack == NULL) {
    return RETURN_OUT_OF_RESOURCES;
  }

  RegisterEl0Stack ((UINT8 *)Stack + EFI_PAGES_TO_SIZE (EL0_STACK_PAGES));

  if (ArmReadCurrentEL() == AARCH64_EL2) {
    HcrReg = ArmReadHcr();

    // Trap General Exceptions. All exceptions that would be routed to EL1 are routed to EL2
    HcrReg |= ARM_HCR_TGE;

    ArmWriteHcr(HcrReg);
  }

  return RETURN_SUCCESS;
}

Example #2

File: ArchPrePi.c Project: binsys/VisualUefi

VOID
ArchInitialize (
  VOID
  )
{
  // Enable Floating Point
  if (FixedPcdGet32 (PcdVFPEnabled)) {
    ArmEnableVFP ();
  }

  if (ArmReadCurrentEL () == AARCH64_EL2) {
    // Trap General Exceptions. All exceptions that would be routed to EL1 are routed to EL2
    ArmWriteHcr (ARM_HCR_TGE);
  }
}