ArmPkg/Drivers/ArmGic/ArmGicLib.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/ArmGicLib.h>
  17 #include <Library/IoLib.h>
  18
  19 #include "GicV2/ArmGicV2Lib.h"
  20
  21 UINTN
  22 EFIAPI
  23 ArmGicGetInterfaceIdentification (
  24   IN  INTN          GicInterruptInterfaceBase
  25   )
  26 {
  27   // Read the GIC Identification Register
  28   return MmioRead32 (GicInterruptInterfaceBase + ARM_GIC_ICCIIDR);
  29 }
  30
  31 UINTN
  32 EFIAPI
  33 ArmGicGetMaxNumInterrupts (
  34   IN  INTN          GicDistributorBase
  35   )
  36 {
  37   return 32 * ((MmioRead32 (GicDistributorBase + ARM_GIC_ICDICTR) & 0x1F) + 1);
  38 }
  39
  40 VOID
  41 EFIAPI
  42 ArmGicSendSgiTo (
  43   IN  INTN          GicDistributorBase,
  44   IN  INTN          TargetListFilter,
  45   IN  INTN          CPUTargetList,
  46   IN  INTN          SgiId
  47   )
  48 {
  49   MmioWrite32 (GicDistributorBase + ARM_GIC_ICDSGIR, ((TargetListFilter & 0x3) << 24) | ((CPUTargetList & 0xFF) << 16) | SgiId);
  50 }
  51
  52 UINTN
  53 EFIAPI
  54 ArmGicAcknowledgeInterrupt (
  55   IN  UINTN          GicInterruptInterfaceBase
  56   )
  57 {
  58   return ArmGicV2AcknowledgeInterrupt (GicInterruptInterfaceBase);
  59 }
  60
  61 VOID
  62 EFIAPI
  63 ArmGicEndOfInterrupt (
  64   IN  UINTN                 GicInterruptInterfaceBase,
  65   IN UINTN                  Source
  66   )
  67 {
  68   ArmGicV2EndOfInterrupt (GicInterruptInterfaceBase, Source);
  69 }
  70
  71 VOID
  72 EFIAPI
  73 ArmGicEnableInterrupt (
  74   IN UINTN                  GicDistributorBase,
  75   IN UINTN                  Source
  76   )
  77 {
  78   UINT32    RegOffset;
  79   UINTN     RegShift;
  80
  81   // Calculate enable register offset and bit position
  82   RegOffset = Source / 32;
  83   RegShift = Source % 32;
  84
  85   // Write set-enable register
  86   MmioWrite32 (GicDistributorBase + ARM_GIC_ICDISER + (4 * RegOffset), 1 << RegShift);
  87 }
  88
  89 VOID
  90 EFIAPI
  91 ArmGicDisableInterrupt (
  92   IN UINTN                  GicDistributorBase,
  93   IN UINTN                  Source
  94   )
  95 {
  96   UINT32    RegOffset;
  97   UINTN     RegShift;
  98
  99   // Calculate enable register offset and bit position
 100   RegOffset = Source / 32;
 101   RegShift = Source % 32;
 102
 103   // Write clear-enable register
 104   MmioWrite32 (GicDistributorBase + ARM_GIC_ICDICER + (4 * RegOffset), 1 << RegShift);
 105 }
 106
 107 BOOLEAN
 108 EFIAPI
 109 ArmGicIsInterruptEnabled (
 110   IN UINTN                  GicDistributorBase,
 111   IN UINTN                  Source
 112   )
 113 {
 114   UINT32    RegOffset;
 115   UINTN     RegShift;
 116
 117   // Calculate enable register offset and bit position
 118   RegOffset = Source / 32;
 119   RegShift = Source % 32;
 120
 121   return ((MmioRead32 (GicDistributorBase + ARM_GIC_ICDISER + (4 * RegOffset)) & (1 << RegShift)) != 0);
 122 }
 123
 124 VOID
 125 EFIAPI
 126 ArmGicDisableDistributor (
 127   IN  INTN          GicDistributorBase
 128   )
 129 {
 130   // Disable Gic Distributor
 131   MmioWrite32 (GicDistributorBase + ARM_GIC_ICDDCR, 0x0);
 132 }
 133
 134 VOID
 135 EFIAPI
 136 ArmGicEnableInterruptInterface (
 137   IN  INTN          GicInterruptInterfaceBase
 138   )
 139 {
 140   return ArmGicV2EnableInterruptInterface (GicInterruptInterfaceBase);
 141 }
 142
 143 VOID
 144 EFIAPI
 145 ArmGicDisableInterruptInterface (
 146   IN  INTN          GicInterruptInterfaceBase
 147   )
 148 {
 149   return ArmGicV2DisableInterruptInterface (GicInterruptInterfaceBase);
 150 }