UefiCpuPkg/CpuDxe: Enable protection for newly added page table

[mirror_edk2.git] / UefiCpuPkg / Library / CpuExceptionHandlerLib / SecPeiCpuException.c

/** @file\r
  CPU exception handler library implemenation for SEC/PEIM modules.\r
\r
Copyright (c) 2012 - 2017, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials are licensed and made available under\r
the terms and conditions of the BSD License that accompanies this distribution.\r
The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php.\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <PiPei.h>\r
#include "CpuExceptionCommon.h"\r
\r
CONST UINTN    mDoFarReturnFlag  = 0;\r
\r
/**\r
  Common exception handler.\r
\r
  @param ExceptionType  Exception type.\r
  @param SystemContext  Pointer to EFI_SYSTEM_CONTEXT.\r
**/\r
VOID\r
EFIAPI\r
CommonExceptionHandler (\r
  IN EFI_EXCEPTION_TYPE   ExceptionType,\r
  IN EFI_SYSTEM_CONTEXT   SystemContext\r
  )\r
{\r
  //\r
  // Display ExceptionType, CPU information and Image information\r
  //\r
  DumpImageAndCpuContent (ExceptionType, SystemContext);\r
\r
  //\r
  // Enter a dead loop.\r
  //\r
  CpuDeadLoop ();\r
}\r
\r
/**\r
  Initializes all CPU exceptions entries and provides the default exception handlers.\r
\r
  Caller should try to get an array of interrupt and/or exception vectors that are in use and need to\r
  persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.\r
  If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.\r
  If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.\r
  Note: Before invoking this API, caller must allocate memory for IDT table and load\r
        IDTR by AsmWriteIdtr().\r
\r
  @param[in]  VectorInfo    Pointer to reserved vector list.\r
\r
  @retval EFI_SUCCESS           CPU Exception Entries have been successfully initialized\r
                                with default exception handlers.\r
  @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.\r
  @retval EFI_UNSUPPORTED       This function is not supported.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
InitializeCpuExceptionHandlers (\r
  IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL\r
  )\r
{\r
  EFI_STATUS                       Status;\r
  RESERVED_VECTORS_DATA            ReservedVectorData[CPU_EXCEPTION_NUM];\r
  IA32_DESCRIPTOR                  IdtDescriptor;\r
  UINTN                            IdtEntryCount;\r
  UINT16                           CodeSegment;\r
  EXCEPTION_HANDLER_TEMPLATE_MAP   TemplateMap;\r
  IA32_IDT_GATE_DESCRIPTOR         *IdtTable;\r
  UINTN                            Index;\r
  UINTN                            InterruptHandler;\r
\r
  if (VectorInfo != NULL) {\r
    SetMem ((VOID *) ReservedVectorData, sizeof (RESERVED_VECTORS_DATA) * CPU_EXCEPTION_NUM, 0xff);\r
    Status = ReadAndVerifyVectorInfo (VectorInfo, ReservedVectorData, CPU_EXCEPTION_NUM);\r
    if (EFI_ERROR (Status)) {\r
      return EFI_INVALID_PARAMETER;\r
    }\r
  }\r
  //\r
  // Read IDT descriptor and calculate IDT size\r
  //\r
  AsmReadIdtr (&IdtDescriptor);\r
  IdtEntryCount = (IdtDescriptor.Limit + 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR);\r
  if (IdtEntryCount > CPU_EXCEPTION_NUM) {\r
    //\r
    // CPU exeption library only setup CPU_EXCEPTION_NUM exception handler at most\r
    //\r
    IdtEntryCount = CPU_EXCEPTION_NUM;\r
  }\r
  //\r
  // Use current CS as the segment selector of interrupt gate in IDT\r
  //\r
  CodeSegment = AsmReadCs ();\r
\r
  AsmGetTemplateAddressMap (&TemplateMap);\r
  IdtTable = (IA32_IDT_GATE_DESCRIPTOR *)IdtDescriptor.Base;\r
  for (Index = 0; Index < IdtEntryCount; Index ++) {\r
    IdtTable[Index].Bits.Selector = CodeSegment;\r
    //\r
    // Check reserved vectors attributes if has, only EFI_VECTOR_HANDOFF_DO_NOT_HOOK\r
    // supported in this instance\r
    //\r
    if (VectorInfo != NULL) {\r
      if (ReservedVectorData[Index].Attribute == EFI_VECTOR_HANDOFF_DO_NOT_HOOK) {\r
        continue;\r
      }\r
    }\r
    //\r
    // Update IDT entry\r
    //\r
    InterruptHandler = TemplateMap.ExceptionStart + Index * TemplateMap.ExceptionStubHeaderSize;\r
    ArchUpdateIdtEntry (&IdtTable[Index], InterruptHandler);\r
  }\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Initializes all CPU interrupt/exceptions entries and provides the default interrupt/exception handlers.\r
\r
  Caller should try to get an array of interrupt and/or exception vectors that are in use and need to\r
  persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.\r
  If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.\r
  If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.\r
\r
  @param[in]  VectorInfo    Pointer to reserved vector list.\r
\r
  @retval EFI_SUCCESS           All CPU interrupt/exception entries have been successfully initialized\r
                                with default interrupt/exception handlers.\r
  @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.\r
  @retval EFI_UNSUPPORTED       This function is not supported.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
InitializeCpuInterruptHandlers (\r
  IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/**\r
  Registers a function to be called from the processor interrupt handler.\r
\r
  This function registers and enables the handler specified by InterruptHandler for a processor\r
  interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the\r
  handler for the processor interrupt or exception type specified by InterruptType is uninstalled.\r
  The installed handler is called once for each processor interrupt or exception.\r
  NOTE: This function should be invoked after InitializeCpuExceptionHandlers() or\r
  InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED returned.\r
\r
  @param[in]  InterruptType     Defines which interrupt or exception to hook.\r
  @param[in]  InterruptHandler  A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called\r
                                when a processor interrupt occurs. If this parameter is NULL, then the handler\r
                                will be uninstalled.\r
\r
  @retval EFI_SUCCESS           The handler for the processor interrupt was successfully installed or uninstalled.\r
  @retval EFI_ALREADY_STARTED   InterruptHandler is not NULL, and a handler for InterruptType was\r
                                previously installed.\r
  @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not\r
                                previously installed.\r
  @retval EFI_UNSUPPORTED       The interrupt specified by InterruptType is not supported,\r
                                or this function is not supported.\r
**/\r
EFI_STATUS\r
EFIAPI\r
RegisterCpuInterruptHandler (\r
  IN EFI_EXCEPTION_TYPE            InterruptType,\r
  IN EFI_CPU_INTERRUPT_HANDLER     InterruptHandler\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/**\r
  Initializes all CPU exceptions entries with optional extra initializations.\r
\r
  By default, this method should include all functionalities implemented by\r
  InitializeCpuExceptionHandlers(), plus extra initialization works, if any.\r
  This could be done by calling InitializeCpuExceptionHandlers() directly\r
  in this method besides the extra works.\r
\r
  InitData is optional and its use and content are processor arch dependent.\r
  The typical usage of it is to convey resources which have to be reserved\r
  elsewhere and are necessary for the extra initializations of exception.\r
\r
  @param[in]  VectorInfo    Pointer to reserved vector list.\r
  @param[in]  InitData      Pointer to data optional for extra initializations\r
                            of exception.\r
\r
  @retval EFI_SUCCESS             The exceptions have been successfully\r
                                  initialized.\r
  @retval EFI_INVALID_PARAMETER   VectorInfo or InitData contains invalid\r
                                  content.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
InitializeCpuExceptionHandlersEx (\r
  IN EFI_VECTOR_HANDOFF_INFO            *VectorInfo OPTIONAL,\r
  IN CPU_EXCEPTION_INIT_DATA            *InitData OPTIONAL\r
  )\r
{\r
  return InitializeCpuExceptionHandlers (VectorInfo);\r
}\r