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