SmmStmSupport.c File Reference

#include <PiMm.h>
#include <Library/DebugLib.h>
#include "SmmStm.h"

Go to the source code of this file.

Macros
#define	IA32_PG_P   BIT0
#define	IA32_PG_RW   BIT1
#define	IA32_PG_PS   BIT7

Functions
VOID	StmGen4GPageTable (IN UINTN PageTableBase)
UINT32 EFIAPI	SmmStmExceptionHandler (IN OUT STM_PROTECTION_EXCEPTION_STACK_FRAME Context)

Detailed Description

SMM STM support functions

Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file SmmStmSupport.c.

Macro Definition Documentation

IA32_PG_P

#define IA32_PG_P   BIT0

Page Table Entry

Definition at line 17 of file SmmStmSupport.c.

IA32_PG_PS

#define IA32_PG_PS   BIT7

Definition at line 19 of file SmmStmSupport.c.

IA32_PG_RW

#define IA32_PG_RW   BIT1

Definition at line 18 of file SmmStmSupport.c.

Function Documentation

SmmStmExceptionHandler()

UINT32 EFIAPI SmmStmExceptionHandler

(

IN OUT STM_PROTECTION_EXCEPTION_STACK_FRAME

Context

)

This is SMM exception handle. Consumed by STM when exception happen.

Parameters

Context

STM protection exception stack frame

Returns

the EBX value for STM reference. EBX = 0: resume SMM guest using register state found on exception stack. EBX = 1 to 0x0F: EBX contains a BIOS error code which the STM must record in the TXT.ERRORCODE register and subsequently reset the system via TXT.CMD.SYS_RESET. The value of the TXT.ERRORCODE register is calculated as follows: TXT.ERRORCODE = (EBX & 0x0F) | STM_CRASH_BIOS_PANIC EBX = 0x10 to 0xFFFFFFFF - reserved, do not use.

Definition at line 77 of file SmmStmSupport.c.

StmGen4GPageTable()

VOID StmGen4GPageTable

(

IN UINTN

PageTableBase

)

Create 4G page table for STM. 2M PAE page table in X64 version.

Parameters

PageTableBase

The page table base in MSEG

Definition at line 30 of file SmmStmSupport.c.