ArmPkg/Drivers/ArmGic/ArmGicSecLib.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011-2014, ARM Limited. All rights reserved.
   4 *
   5 *  This program and the accompanying materials
   6 *  are licensed and made available under the terms and conditions of the BSD License
   7 *  which accompanies this distribution.  The full text of the license may be found at
   8 *  http://opensource.org/licenses/bsd-license.php
   9 *
  10 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 *
  13 **/
  14
  15 #include <Base.h>
  16 #include <Library/DebugLib.h>
  17 #include <Library/IoLib.h>
  18 #include <Library/ArmGicLib.h>
  19
  20 #include "GicV2/ArmGicV2Lib.h"
  21
  22 /*
  23  * This function configures the interrupts set by the mask to be secure.
  24  *
  25  */
  26 VOID
  27 EFIAPI
  28 ArmGicSetSecureInterrupts (
  29   IN  UINTN         GicDistributorBase,
  30   IN  UINTN*        GicSecureInterruptMask,
  31   IN  UINTN         GicSecureInterruptMaskSize
  32   )
  33 {
  34   UINTN  Index;
  35   UINT32 InterruptStatus;
  36
  37   // We must not have more interrupts defined by the mask than the number of available interrupts
  38   ASSERT(GicSecureInterruptMaskSize <= (ArmGicGetMaxNumInterrupts (GicDistributorBase) / 32));
  39
  40   // Set all the interrupts defined by the mask as Secure
  41   for (Index = 0; Index < GicSecureInterruptMaskSize; Index++) {
  42     InterruptStatus = MmioRead32 (GicDistributorBase + ARM_GIC_ICDISR + (Index * 4));
  43     MmioWrite32 (GicDistributorBase + ARM_GIC_ICDISR + (Index * 4), InterruptStatus & (~GicSecureInterruptMask[Index]));
  44   }
  45 }
  46
  47 VOID
  48 EFIAPI
  49 ArmGicEnableDistributor (
  50   IN  INTN          GicDistributorBase
  51   )
  52 {
  53   // Turn on the GIC distributor
  54   MmioWrite32 (GicDistributorBase + ARM_GIC_ICDDCR, 1);
  55 }
  56
  57 VOID
  58 EFIAPI
  59 ArmGicSetupNonSecure (
  60   IN  UINTN         MpId,
  61   IN  INTN          GicDistributorBase,
  62   IN  INTN          GicInterruptInterfaceBase
  63   )
  64 {
  65   ArmGicV2SetupNonSecure (MpId, GicDistributorBase, GicInterruptInterfaceBase);
  66 }