mirror of https://github.com/acidanthera/audk.git
103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/** @file
|
|
|
|
Functions and types shared by the SMM accessor PEI and DXE modules.
|
|
|
|
Copyright (C) 2015, Red Hat, Inc.
|
|
|
|
This program and the accompanying materials are licensed and made available
|
|
under the terms and conditions of the BSD License which accompanies this
|
|
distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
|
|
WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
#include <Pi/PiMultiPhase.h>
|
|
|
|
//
|
|
// We'll have two SMRAM ranges.
|
|
//
|
|
// The first is a tiny one that hosts an SMM_S3_RESUME_STATE object, to be
|
|
// filled in by the CPU SMM driver during normal boot, for the PEI instance of
|
|
// the LockBox library (which will rely on the object during S3 resume).
|
|
//
|
|
// The other SMRAM range is the main one, for the SMM core and the SMM drivers.
|
|
//
|
|
typedef enum {
|
|
DescIdxSmmS3ResumeState = 0,
|
|
DescIdxMain = 1,
|
|
DescIdxCount = 2
|
|
} DESCRIPTOR_INDEX;
|
|
|
|
//
|
|
// The value of PcdQ35TsegMbytes is saved into this variable at module startup.
|
|
//
|
|
extern UINT16 mQ35TsegMbytes;
|
|
|
|
/**
|
|
Save PcdQ35TsegMbytes into mQ35TsegMbytes.
|
|
**/
|
|
VOID
|
|
InitQ35TsegMbytes (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Read the MCH_SMRAM and ESMRAMC registers, and update the LockState and
|
|
OpenState fields in the PEI_SMM_ACCESS_PPI / EFI_SMM_ACCESS2_PROTOCOL object,
|
|
from the D_LCK and T_EN bits.
|
|
|
|
PEI_SMM_ACCESS_PPI and EFI_SMM_ACCESS2_PROTOCOL member functions can rely on
|
|
the LockState and OpenState fields being up-to-date on entry, and they need
|
|
to restore the same invariant on exit, if they touch the bits in question.
|
|
|
|
@param[out] LockState Reflects the D_LCK bit on output; TRUE iff SMRAM is
|
|
locked.
|
|
@param[out] OpenState Reflects the inverse of the T_EN bit on output; TRUE
|
|
iff SMRAM is open.
|
|
**/
|
|
VOID
|
|
GetStates (
|
|
OUT BOOLEAN *LockState,
|
|
OUT BOOLEAN *OpenState
|
|
);
|
|
|
|
//
|
|
// The functions below follow the PEI_SMM_ACCESS_PPI and
|
|
// EFI_SMM_ACCESS2_PROTOCOL member declarations. The PeiServices and This
|
|
// pointers are removed (TSEG doesn't depend on them), and so is the
|
|
// DescriptorIndex parameter (TSEG doesn't support range-wise locking).
|
|
//
|
|
// The LockState and OpenState members that are common to both
|
|
// PEI_SMM_ACCESS_PPI and EFI_SMM_ACCESS2_PROTOCOL are taken and updated in
|
|
// isolation from the rest of the (non-shared) members.
|
|
//
|
|
|
|
EFI_STATUS
|
|
SmramAccessOpen (
|
|
OUT BOOLEAN *LockState,
|
|
OUT BOOLEAN *OpenState
|
|
);
|
|
|
|
EFI_STATUS
|
|
SmramAccessClose (
|
|
OUT BOOLEAN *LockState,
|
|
OUT BOOLEAN *OpenState
|
|
);
|
|
|
|
EFI_STATUS
|
|
SmramAccessLock (
|
|
OUT BOOLEAN *LockState,
|
|
IN OUT BOOLEAN *OpenState
|
|
);
|
|
|
|
EFI_STATUS
|
|
SmramAccessGetCapabilities (
|
|
IN BOOLEAN LockState,
|
|
IN BOOLEAN OpenState,
|
|
IN OUT UINTN *SmramMapSize,
|
|
IN OUT EFI_SMRAM_DESCRIPTOR *SmramMap
|
|
);
|