UefiCpuPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLibNoStm.c

   1 /** @file
   2 The CPU specific programming for PiSmmCpuDxeSmm module when STM support
   3 is not included.
   4
   5 Copyright (c) 2010 - 2016, Intel Corporation. All rights reserved.<BR>
   6 SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include <PiMm.h>
  11 #include <Library/SmmCpuFeaturesLib.h>
  12 #include "CpuFeaturesLib.h"
  13
  14 /**
  15   Internal worker function that is called to complete CPU initialization at the
  16   end of SmmCpuFeaturesInitializeProcessor().
  17
  18 **/
  19 VOID
  20 FinishSmmCpuFeaturesInitializeProcessor (
  21   VOID
  22   )
  23 {
  24 }
  25
  26 /**
  27   Return the size, in bytes, of a custom SMI Handler in bytes.  If 0 is
  28   returned, then a custom SMI handler is not provided by this library,
  29   and the default SMI handler must be used.
  30
  31   @retval 0    Use the default SMI handler.
  32   @retval > 0  Use the SMI handler installed by SmmCpuFeaturesInstallSmiHandler()
  33                The caller is required to allocate enough SMRAM for each CPU to
  34                support the size of the custom SMI handler.
  35 **/
  36 UINTN
  37 EFIAPI
  38 SmmCpuFeaturesGetSmiHandlerSize (
  39   VOID
  40   )
  41 {
  42   return 0;
  43 }
  44
  45 /**
  46   Install a custom SMI handler for the CPU specified by CpuIndex.  This function
  47   is only called if SmmCpuFeaturesGetSmiHandlerSize() returns a size is greater
  48   than zero and is called by the CPU that was elected as monarch during System
  49   Management Mode initialization.
  50
  51   @param[in] CpuIndex   The index of the CPU to install the custom SMI handler.
  52                         The value must be between 0 and the NumberOfCpus field
  53                         in the System Management System Table (SMST).
  54   @param[in] SmBase     The SMBASE address for the CPU specified by CpuIndex.
  55   @param[in] SmiStack   The stack to use when an SMI is processed by the
  56                         the CPU specified by CpuIndex.
  57   @param[in] StackSize  The size, in bytes, if the stack used when an SMI is
  58                         processed by the CPU specified by CpuIndex.
  59   @param[in] GdtBase    The base address of the GDT to use when an SMI is
  60                         processed by the CPU specified by CpuIndex.
  61   @param[in] GdtSize    The size, in bytes, of the GDT used when an SMI is
  62                         processed by the CPU specified by CpuIndex.
  63   @param[in] IdtBase    The base address of the IDT to use when an SMI is
  64                         processed by the CPU specified by CpuIndex.
  65   @param[in] IdtSize    The size, in bytes, of the IDT used when an SMI is
  66                         processed by the CPU specified by CpuIndex.
  67   @param[in] Cr3        The base address of the page tables to use when an SMI
  68                         is processed by the CPU specified by CpuIndex.
  69 **/
  70 VOID
  71 EFIAPI
  72 SmmCpuFeaturesInstallSmiHandler (
  73   IN UINTN   CpuIndex,
  74   IN UINT32  SmBase,
  75   IN VOID    *SmiStack,
  76   IN UINTN   StackSize,
  77   IN UINTN   GdtBase,
  78   IN UINTN   GdtSize,
  79   IN UINTN   IdtBase,
  80   IN UINTN   IdtSize,
  81   IN UINT32  Cr3
  82   )
  83 {
  84 }