SmmStmSupport.c

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#include <PiMm.h>
#include <Library/DebugLib.h>
 
#include "SmmStm.h"
 
#define IA32_PG_P   BIT0
#define IA32_PG_RW  BIT1
#define IA32_PG_PS  BIT7
 
VOID
StmGen4GPageTable (
  IN UINTN  PageTableBase
  )
{
  UINTN   Index;
  UINT32  *Pte;
  UINT32  Address;
 
  Pte = (UINT32 *)(UINTN)PageTableBase;
 
  Address = 0;
  for (Index = 0; Index < SIZE_4KB / sizeof (*Pte); Index++) {
    *Pte = Address | IA32_PG_PS | IA32_PG_RW | IA32_PG_P;
    Pte++;
    Address += SIZE_4MB;
  }
}
 
UINT32
EFIAPI
SmmStmExceptionHandler (
  IN OUT STM_PROTECTION_EXCEPTION_STACK_FRAME  Context
  )
{
  // TBD - SmmStmExceptionHandler, record information
  DEBUG ((DEBUG_ERROR, "SmmStmExceptionHandler ...\n"));
  //
  // Skip this instruction and continue;
  //
  Context.Ia32StackFrame->Rip += Context.Ia32StackFrame->VmcsExitInstructionLength;
 
  return 0;
}