ArmPkg/Drivers/ArmGic/ArmGic.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011-2013, 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 <Uefi.h>
  16 #include <Library/IoLib.h>
  17 #include <Library/ArmGicLib.h>
  18 #include <Library/PcdLib.h>
  19
  20 UINTN
  21 EFIAPI
  22 ArmGicGetMaxNumInterrupts (
  23   IN  INTN          GicDistributorBase
  24   )
  25 {
  26   return 32 * ((MmioRead32 (GicDistributorBase + ARM_GIC_ICDICTR) & 0x1F) + 1);
  27 }
  28
  29 VOID
  30 EFIAPI
  31 ArmGicSendSgiTo (
  32   IN  INTN          GicDistributorBase,
  33   IN  INTN          TargetListFilter,
  34   IN  INTN          CPUTargetList,
  35   IN  INTN          SgiId
  36   )
  37 {
  38   MmioWrite32 (GicDistributorBase + ARM_GIC_ICDSGIR, ((TargetListFilter & 0x3) << 24) | ((CPUTargetList & 0xFF) << 16) | SgiId);
  39 }
  40
  41 UINTN
  42 EFIAPI
  43 ArmGicAcknowledgeInterrupt (
  44   IN  UINTN          GicInterruptInterfaceBase
  45   )
  46 {
  47   // Read the Interrupt Acknowledge Register
  48   return MmioRead32 (GicInterruptInterfaceBase + ARM_GIC_ICCIAR);
  49 }
  50
  51 VOID
  52 EFIAPI
  53 ArmGicEndOfInterrupt (
  54   IN  UINTN                 GicInterruptInterfaceBase,
  55   IN UINTN                  Source
  56   )
  57 {
  58   MmioWrite32 (GicInterruptInterfaceBase + ARM_GIC_ICCEIOR, Source);
  59 }