ArmPkg/Drivers/ArmGic/ArmGicCommonDxe.c

   1 /*++
   2
   3 Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
   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 "ArmGicDxe.h"
  16
  17 VOID
  18 EFIAPI
  19 IrqInterruptHandler (
  20   IN EFI_EXCEPTION_TYPE           InterruptType,
  21   IN EFI_SYSTEM_CONTEXT           SystemContext
  22   );
  23
  24 VOID
  25 EFIAPI
  26 ExitBootServicesEvent (
  27   IN EFI_EVENT  Event,
  28   IN VOID       *Context
  29   );
  30
  31 //
  32 // Making this global saves a few bytes in image size
  33 //
  34 EFI_HANDLE  gHardwareInterruptHandle = NULL;
  35
  36 //
  37 // Notifications
  38 //
  39 EFI_EVENT EfiExitBootServicesEvent      = (EFI_EVENT)NULL;
  40
  41 // Maximum Number of Interrupts
  42 UINTN mGicNumInterrupts                 = 0;
  43
  44 HARDWARE_INTERRUPT_HANDLER  *gRegisteredInterruptHandlers = NULL;
  45
  46 EFI_STATUS
  47 InstallAndRegisterInterruptService (
  48   IN EFI_HARDWARE_INTERRUPT_PROTOCOL   *InterruptProtocol,
  49   IN EFI_CPU_INTERRUPT_HANDLER          InterruptHandler,
  50   IN EFI_EVENT_NOTIFY                   ExitBootServicesEvent
  51   )
  52 {
  53   EFI_STATUS               Status;
  54   EFI_CPU_ARCH_PROTOCOL   *Cpu;
  55
  56   // Initialize the array for the Interrupt Handlers
  57   gRegisteredInterruptHandlers = (HARDWARE_INTERRUPT_HANDLER*)AllocateZeroPool (sizeof(HARDWARE_INTERRUPT_HANDLER) * mGicNumInterrupts);
  58   if (gRegisteredInterruptHandlers == NULL) {
  59     return EFI_OUT_OF_RESOURCES;
  60   }
  61
  62   Status = gBS->InstallMultipleProtocolInterfaces (
  63                   &gHardwareInterruptHandle,
  64                   &gHardwareInterruptProtocolGuid, InterruptProtocol,
  65                   NULL
  66                   );
  67   if (EFI_ERROR (Status)) {
  68     return Status;
  69   }
  70
  71   //
  72   // Get the CPU protocol that this driver requires.
  73   //
  74   Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&Cpu);
  75   if (EFI_ERROR (Status)) {
  76     return Status;
  77   }
  78
  79   //
  80   // Unregister the default exception handler.
  81   //
  82   Status = Cpu->RegisterInterruptHandler (Cpu, ARM_ARCH_EXCEPTION_IRQ, NULL);
  83   if (EFI_ERROR (Status)) {
  84     return Status;
  85   }
  86
  87   //
  88   // Register to receive interrupts
  89   //
  90   Status = Cpu->RegisterInterruptHandler (Cpu, ARM_ARCH_EXCEPTION_IRQ, InterruptHandler);
  91   if (EFI_ERROR (Status)) {
  92     return Status;
  93   }
  94
  95   // Register for an ExitBootServicesEvent
  96   Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_NOTIFY, ExitBootServicesEvent, NULL, &EfiExitBootServicesEvent);
  97
  98   return Status;
  99 }