UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h

   1 /** @file
   2   Common header file for CPU Exception Handler Library.
   3
   4   Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>
   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 #ifndef _CPU_EXCEPTION_COMMON_H_
  16 #define _CPU_EXCEPTION_COMMON_H_
  17
  18 #include <Ppi/VectorHandoffInfo.h>
  19 #include <Protocol/Cpu.h>
  20 #include <Library/BaseLib.h>
  21 #include <Library/SerialPortLib.h>
  22 #include <Library/PrintLib.h>
  23 #include <Library/LocalApicLib.h>
  24 #include <Library/PeCoffGetEntryPointLib.h>
  25 #include <Library/BaseMemoryLib.h>
  26 #include <Library/SynchronizationLib.h>
  27
  28 #define  CPU_EXCEPTION_NUM          32
  29 #define  CPU_INTERRUPT_NUM         256
  30 #define  HOOKAFTER_STUB_SIZE        16
  31
  32 #include "ArchInterruptDefs.h"
  33
  34 //
  35 // Record exception handler information
  36 //
  37 typedef struct {
  38   UINTN ExceptionStart;
  39   UINTN ExceptionStubHeaderSize;
  40   UINTN HookAfterStubHeaderStart;
  41 } EXCEPTION_HANDLER_TEMPLATE_MAP;
  42
  43 typedef struct {
  44   UINTN                       IdtEntryCount;
  45   SPIN_LOCK                   DisplayMessageSpinLock;
  46   RESERVED_VECTORS_DATA       *ReservedVectors;
  47   EFI_CPU_INTERRUPT_HANDLER   *ExternalInterruptHandler;
  48 } EXCEPTION_HANDLER_DATA;
  49
  50 extern CONST UINT32                mErrorCodeFlag;
  51 extern CONST UINTN                 mImageAlignSize;
  52 extern CONST UINTN                 mDoFarReturnFlag;
  53 extern RESERVED_VECTORS_DATA       *mReservedVectors;
  54
  55 /**
  56   Return address map of exception handler template so that C code can generate
  57   exception tables.
  58
  59   @param AddressMap  Pointer to a buffer where the address map is returned.
  60 **/
  61 VOID
  62 EFIAPI
  63 AsmGetTemplateAddressMap (
  64   OUT EXCEPTION_HANDLER_TEMPLATE_MAP *AddressMap
  65   );
  66
  67 /**
  68   Return address map of exception handler template so that C code can generate
  69   exception tables.
  70
  71   @param IdtEntry          Pointer to IDT entry to be updated.
  72   @param InterruptHandler  IDT handler value.
  73
  74 **/
  75 VOID
  76 ArchUpdateIdtEntry (
  77   IN IA32_IDT_GATE_DESCRIPTOR        *IdtEntry,
  78   IN UINTN                           InterruptHandler
  79   );
  80
  81 /**
  82   Read IDT handler value from IDT entry.
  83
  84   @param IdtEntry          Pointer to IDT entry to be read.
  85
  86 **/
  87 UINTN
  88 ArchGetIdtHandler (
  89   IN IA32_IDT_GATE_DESCRIPTOR        *IdtEntry
  90   );
  91
  92 /**
  93   Prints a message to the serial port.
  94
  95   @param  Format      Format string for the message to print.
  96   @param  ...         Variable argument list whose contents are accessed
  97                       based on the format string specified by Format.
  98
  99 **/
 100 VOID
 101 EFIAPI
 102 InternalPrintMessage (
 103   IN  CONST CHAR8  *Format,
 104   ...
 105   );
 106
 107 /**
 108   Find and display image base address and return image base and its entry point.
 109
 110   @param CurrentEip      Current instruction pointer.
 111   @param EntryPoint      Return module entry point if module header is found.
 112
 113   @return !0     Image base address.
 114   @return 0      Image header cannot be found.
 115 **/
 116 UINTN
 117 FindModuleImageBase (
 118   IN  UINTN              CurrentEip,
 119   OUT UINTN              *EntryPoint
 120   );
 121
 122 /**
 123   Display CPU information.
 124
 125   @param ExceptionType  Exception type.
 126   @param SystemContext  Pointer to EFI_SYSTEM_CONTEXT.
 127 **/
 128 VOID
 129 DumpCpuContent (
 130   IN EFI_EXCEPTION_TYPE   ExceptionType,
 131   IN EFI_SYSTEM_CONTEXT   SystemContext
 132   );
 133
 134 /**
 135   Internal worker function to initialize exception handler.
 136
 137   @param[in]      VectorInfo            Pointer to reserved vector list.
 138   @param[in, out] ExceptionHandlerData  Pointer to exception handler data.
 139
 140   @retval EFI_SUCCESS           CPU Exception Entries have been successfully initialized
 141                                 with default exception handlers.
 142   @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
 143   @retval EFI_UNSUPPORTED       This function is not supported.
 144
 145 **/
 146 EFI_STATUS
 147 InitializeCpuExceptionHandlersWorker (
 148   IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL,
 149   IN OUT EXCEPTION_HANDLER_DATA    *ExceptionHandlerData
 150   );
 151
 152 /**
 153   Registers a function to be called from the processor interrupt handler.
 154
 155   @param[in]  InterruptType     Defines which interrupt or exception to hook.
 156   @param[in]  InterruptHandler  A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
 157                                 when a processor interrupt occurs. If this parameter is NULL, then the handler
 158                                 will be uninstalled.
 159
 160   @retval EFI_SUCCESS           The handler for the processor interrupt was successfully installed or uninstalled.
 161   @retval EFI_ALREADY_STARTED   InterruptHandler is not NULL, and a handler for InterruptType was
 162                                 previously installed.
 163   @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
 164                                 previously installed.
 165   @retval EFI_UNSUPPORTED       The interrupt specified by InterruptType is not supported,
 166                                 or this function is not supported.
 167 **/
 168 EFI_STATUS
 169 RegisterCpuInterruptHandlerWorker (
 170   IN EFI_EXCEPTION_TYPE            InterruptType,
 171   IN EFI_CPU_INTERRUPT_HANDLER     InterruptHandler
 172   );
 173
 174 /**
 175   Internal worker function to update IDT entries accordling to vector attributes.
 176
 177   @param[in] IdtTable              Pointer to IDT table.
 178   @param[in] TemplateMap           Pointer to a buffer where the address map is
 179                                    returned.
 180   @param[in] ExceptionHandlerData  Pointer to exception handler data.
 181
 182 **/
 183 VOID
 184 UpdateIdtTable (
 185   IN IA32_IDT_GATE_DESCRIPTOR        *IdtTable,
 186   IN EXCEPTION_HANDLER_TEMPLATE_MAP  *TemplateMap,
 187   IN EXCEPTION_HANDLER_DATA          *ExceptionHandlerData
 188   );
 189
 190 /**
 191   Save CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.
 192
 193   @param[in] ExceptionType  Exception type.
 194   @param[in] SystemContext  Pointer to EFI_SYSTEM_CONTEXT.
 195
 196 **/
 197 VOID
 198 ArchSaveExceptionContext (
 199   IN UINTN                ExceptionType,
 200   IN EFI_SYSTEM_CONTEXT   SystemContext
 201   );
 202
 203 /**
 204   Restore CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.
 205
 206   @param[in] ExceptionType  Exception type.
 207   @param[in] SystemContext  Pointer to EFI_SYSTEM_CONTEXT.
 208
 209 **/
 210 VOID
 211 ArchRestoreExceptionContext (
 212   IN UINTN                ExceptionType,
 213   IN EFI_SYSTEM_CONTEXT   SystemContext
 214   );
 215
 216 /**
 217   Fix up the vector number and function address in the vector code.
 218
 219   @param[in] NewVectorAddr   New vector handler address.
 220   @param[in] VectorNum       Index of vector.
 221   @param[in] OldVectorAddr   Old vector handler address.
 222
 223 **/
 224 VOID
 225 EFIAPI
 226 AsmVectorNumFixup (
 227   IN VOID    *NewVectorAddr,
 228   IN UINT8   VectorNum,
 229   IN VOID    *OldVectorAddr
 230   );
 231
 232 /**
 233   Read and save reserved vector information
 234
 235   @param[in]  VectorInfo        Pointer to reserved vector list.
 236   @param[out] ReservedVector    Pointer to reserved vector data buffer.
 237   @param[in]  VectorCount       Vector number to be updated.
 238
 239   @return EFI_SUCCESS           Read and save vector info successfully.
 240   @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
 241
 242 **/
 243 EFI_STATUS
 244 ReadAndVerifyVectorInfo (
 245   IN  EFI_VECTOR_HANDOFF_INFO       *VectorInfo,
 246   OUT RESERVED_VECTORS_DATA         *ReservedVector,
 247   IN  UINTN                         VectorCount
 248   );
 249
 250 /**
 251   Get ASCII format string exception name by exception type.
 252
 253   @param ExceptionType  Exception type.
 254
 255   @return  ASCII format string exception name.
 256 **/
 257 CONST CHAR8 *
 258 GetExceptionNameStr (
 259   IN EFI_EXCEPTION_TYPE          ExceptionType
 260   );
 261
 262 #endif
 263