ArmPkg/Drivers/ArmGic/ArmGicSecLib.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011-2014, ARM Limited. All rights reserved.
   4 *
   5 *  SPDX-License-Identifier: BSD-2-Clause-Patent
   6 *
   7 **/
   8
   9 #include <Base.h>
  10 #include <Library/DebugLib.h>
  11 #include <Library/IoLib.h>
  12 #include <Library/ArmGicLib.h>
  13
  14 /*
  15  * This function configures the interrupts set by the mask to be secure.
  16  *
  17  */
  18 VOID
  19 EFIAPI
  20 ArmGicSetSecureInterrupts (
  21   IN  UINTN         GicDistributorBase,
  22   IN  UINTN*        GicSecureInterruptMask,
  23   IN  UINTN         GicSecureInterruptMaskSize
  24   )
  25 {
  26   UINTN  Index;
  27   UINT32 InterruptStatus;
  28
  29   // We must not have more interrupts defined by the mask than the number of available interrupts
  30   ASSERT(GicSecureInterruptMaskSize <= (ArmGicGetMaxNumInterrupts (GicDistributorBase) / 32));
  31
  32   // Set all the interrupts defined by the mask as Secure
  33   for (Index = 0; Index < GicSecureInterruptMaskSize; Index++) {
  34     InterruptStatus = MmioRead32 (GicDistributorBase + ARM_GIC_ICDISR + (Index * 4));
  35     MmioWrite32 (GicDistributorBase + ARM_GIC_ICDISR + (Index * 4), InterruptStatus & (~GicSecureInterruptMask[Index]));
  36   }
  37 }
  38
  39 VOID
  40 EFIAPI
  41 ArmGicEnableDistributor (
  42   IN  INTN          GicDistributorBase
  43   )
  44 {
  45   // Turn on the GIC distributor
  46   MmioWrite32 (GicDistributorBase + ARM_GIC_ICDDCR, 1);
  47 }
  48
  49 VOID
  50 EFIAPI
  51 ArmGicSetupNonSecure (
  52   IN  UINTN         MpId,
  53   IN  INTN          GicDistributorBase,
  54   IN  INTN          GicInterruptInterfaceBase
  55   )
  56 {
  57   ArmGicV2SetupNonSecure (MpId, GicDistributorBase, GicInterruptInterfaceBase);
  58 }