UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeSmmCpuException.c

   1 /** @file
   2   CPU Exception Library provides DXE/SMM CPU exception handler.
   3
   4 Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials are licensed and made available under
   6 the terms and conditions of the BSD License that accompanies this distribution.
   7 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 <PiDxe.h>
  16
  17 #include "CpuExceptionCommon.h"
  18 #include <Library/SynchronizationLib.h>
  19
  20 //
  21 // Spinlock for CPU information display
  22 //
  23 SPIN_LOCK        mDisplayMessageSpinLock;
  24
  25 //
  26 // Image align size for DXE/SMM
  27 //
  28 CONST UINTN      mImageAlignSize = SIZE_4KB;
  29
  30 /**
  31   Common exception handler.
  32
  33   @param ExceptionType  Exception type.
  34   @param SystemContext  Pointer to EFI_SYSTEM_CONTEXT.
  35 **/
  36 VOID
  37 EFIAPI
  38 CommonExceptionHandler (
  39   IN EFI_EXCEPTION_TYPE   ExceptionType,
  40   IN EFI_SYSTEM_CONTEXT   SystemContext
  41   )
  42 {
  43   //
  44   // Get Spinlock to display CPU information
  45   //
  46   while (!AcquireSpinLockOrFail (&mDisplayMessageSpinLock)) {
  47     CpuPause ();
  48   }
  49
  50   //
  51   // Display ExceptionType, CPU information and Image information
  52   //
  53   DumpCpuContent (ExceptionType, SystemContext);
  54
  55   //
  56   // Release Spinlock
  57   //
  58   ReleaseSpinLock (&mDisplayMessageSpinLock);
  59
  60   //
  61   // Enter a dead loop.
  62   //
  63   CpuDeadLoop ();
  64 }
  65
  66 /**
  67   Setup CPU exception handlers.
  68
  69   This API will setups the CPU exception handler to display CPU contents and run into
  70   CpuDeadLoop().
  71   Note: Before invoking this API, caller must allocate memory for IDT table and load
  72         IDTR by AsmWriteIdtr().
  73
  74 **/
  75 VOID
  76 EFIAPI
  77 SetupCpuExceptionHandlers (
  78   IN VOID
  79   )
  80 {
  81   InitializeSpinLock (&mDisplayMessageSpinLock);
  82   InternalSetupCpuExceptionHandlers ();
  83 }
  84