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 /*
  21  * This function configures the interrupts set by the mask to be secure.
  22  *
  23  */
  24 VOID
  25 EFIAPI
  26 ArmGicSetSecureInterrupts (
  27   IN  UINTN         GicDistributorBase,
  28   IN  UINTN*        GicSecureInterruptMask,
  29   IN  UINTN         GicSecureInterruptMaskSize
  30   )
  31 {
  32   UINTN  Index;
  33   UINT32 InterruptStatus;
  34
  35   // We must not have more interrupts defined by the mask than the number of available interrupts
  36   ASSERT(GicSecureInterruptMaskSize <= (ArmGicGetMaxNumInterrupts (GicDistributorBase) / 32));
  37
  38   // Set all the interrupts defined by the mask as Secure
  39   for (Index = 0; Index < GicSecureInterruptMaskSize; Index++) {
  40     InterruptStatus = MmioRead32 (GicDistributorBase + ARM_GIC_ICDISR + (Index * 4));
  41     MmioWrite32 (GicDistributorBase + ARM_GIC_ICDISR + (Index * 4), InterruptStatus & (~GicSecureInterruptMask[Index]));
  42   }
  43 }
  44
  45 VOID
  46 EFIAPI
  47 ArmGicEnableDistributor (
  48   IN  INTN          GicDistributorBase
  49   )
  50 {
  51   // Turn on the GIC distributor
  52   MmioWrite32 (GicDistributorBase + ARM_GIC_ICDDCR, 1);
  53 }
  54
  55 VOID
  56 EFIAPI
  57 ArmGicSetupNonSecure (
  58   IN  UINTN         MpId,
  59   IN  INTN          GicDistributorBase,
  60   IN  INTN          GicInterruptInterfaceBase
  61   )
  62 {
  63   ArmGicV2SetupNonSecure (MpId, GicDistributorBase, GicInterruptInterfaceBase);
  64 }