mirror of https://github.com/acidanthera/audk.git
OvmfPkg: add DXE_DRIVER for providing TSEG-as-SMRAM during boot-time DXE
The SMM core depends on EFI_SMM_ACCESS2_PROTOCOL. This small driver (which is a thin wrapper around "OvmfPkg/SmmAccess/SmramInternal.c" that was added in the previous patch) provides that protocol. Notably, EFI_SMM_ACCESS2_PROTOCOL is for boot time only, therefore our MODULE_TYPE is not DXE_RUNTIME_DRIVER. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Michael Kinney <michael.d.kinney@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19041 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Laszlo Ersek
lersek
parent
9d560947f6
commit
c5b7c805a8
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@ -642,3 +642,7 @@
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!endif
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OvmfPkg/PlatformDxe/Platform.inf
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!if $(SMM_REQUIRE) == TRUE
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OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
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!endif
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@ -355,6 +355,10 @@ INF RuleOverride=CSM OvmfPkg/Csm/Csm16/Csm16.inf
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INF OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
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INF OvmfPkg/PlatformDxe/Platform.inf
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!if $(SMM_REQUIRE) == TRUE
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INF OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
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!endif
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################################################################################
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[FV.FVMAIN_COMPACT]
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@ -649,3 +649,7 @@
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!endif
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OvmfPkg/PlatformDxe/Platform.inf
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!if $(SMM_REQUIRE) == TRUE
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OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
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!endif
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@ -355,6 +355,10 @@ INF RuleOverride=CSM OvmfPkg/Csm/Csm16/Csm16.inf
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INF OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
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INF OvmfPkg/PlatformDxe/Platform.inf
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!if $(SMM_REQUIRE) == TRUE
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INF OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
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!endif
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################################################################################
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[FV.FVMAIN_COMPACT]
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@ -647,3 +647,7 @@
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!endif
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OvmfPkg/PlatformDxe/Platform.inf
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!if $(SMM_REQUIRE) == TRUE
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OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
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!endif
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@ -355,6 +355,10 @@ INF RuleOverride=CSM OvmfPkg/Csm/Csm16/Csm16.inf
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INF OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
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INF OvmfPkg/PlatformDxe/Platform.inf
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!if $(SMM_REQUIRE) == TRUE
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INF OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
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!endif
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################################################################################
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[FV.FVMAIN_COMPACT]
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@ -0,0 +1,156 @@
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/** @file
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A DXE_DRIVER providing SMRAM access by producing EFI_SMM_ACCESS2_PROTOCOL.
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Q35 TSEG is expected to have been verified and set up by the SmmAccessPei
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driver.
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Copyright (C) 2013, 2015, Red Hat, Inc.<BR>
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Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
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WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Protocol/SmmAccess2.h>
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#include "SmramInternal.h"
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/**
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Opens the SMRAM area to be accessible by a boot-service driver.
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This function "opens" SMRAM so that it is visible while not inside of SMM.
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The function should return EFI_UNSUPPORTED if the hardware does not support
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hiding of SMRAM. The function should return EFI_DEVICE_ERROR if the SMRAM
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configuration is locked.
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@param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_UNSUPPORTED The system does not support opening and closing of
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SMRAM.
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@retval EFI_DEVICE_ERROR SMRAM cannot be opened, perhaps because it is
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locked.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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SmmAccess2DxeOpen (
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IN EFI_SMM_ACCESS2_PROTOCOL *This
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)
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{
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return SmramAccessOpen (&This->LockState, &This->OpenState);
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}
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/**
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Inhibits access to the SMRAM.
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This function "closes" SMRAM so that it is not visible while outside of SMM.
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The function should return EFI_UNSUPPORTED if the hardware does not support
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hiding of SMRAM.
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@param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_UNSUPPORTED The system does not support opening and closing of
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SMRAM.
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@retval EFI_DEVICE_ERROR SMRAM cannot be closed.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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SmmAccess2DxeClose (
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IN EFI_SMM_ACCESS2_PROTOCOL *This
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)
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{
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return SmramAccessClose (&This->LockState, &This->OpenState);
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}
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/**
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Inhibits access to the SMRAM.
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This function prohibits access to the SMRAM region. This function is usually
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implemented such that it is a write-once operation.
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@param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.
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@retval EFI_SUCCESS The device was successfully locked.
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@retval EFI_UNSUPPORTED The system does not support locking of SMRAM.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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SmmAccess2DxeLock (
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IN EFI_SMM_ACCESS2_PROTOCOL *This
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)
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{
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return SmramAccessLock (&This->LockState, &This->OpenState);
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}
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/**
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Queries the memory controller for the possible regions that will support
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SMRAM.
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@param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.
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@param[in,out] SmramMapSize A pointer to the size, in bytes, of the
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SmramMemoryMap buffer.
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@param[in,out] SmramMap A pointer to the buffer in which firmware
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places the current memory map.
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@retval EFI_SUCCESS The chipset supported the given resource.
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@retval EFI_BUFFER_TOO_SMALL The SmramMap parameter was too small. The
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current buffer size needed to hold the memory
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map is returned in SmramMapSize.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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SmmAccess2DxeGetCapabilities (
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IN CONST EFI_SMM_ACCESS2_PROTOCOL *This,
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IN OUT UINTN *SmramMapSize,
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IN OUT EFI_SMRAM_DESCRIPTOR *SmramMap
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)
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{
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return SmramAccessGetCapabilities (This->LockState, This->OpenState,
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SmramMapSize, SmramMap);
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}
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//
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// LockState and OpenState will be filled in by the entry point.
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//
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STATIC EFI_SMM_ACCESS2_PROTOCOL mAccess2 = {
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&SmmAccess2DxeOpen,
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&SmmAccess2DxeClose,
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&SmmAccess2DxeLock,
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&SmmAccess2DxeGetCapabilities
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};
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//
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// Entry point of this driver.
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//
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EFI_STATUS
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EFIAPI
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SmmAccess2DxeEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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//
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// This module should only be included if SMRAM support is required.
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//
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ASSERT (FeaturePcdGet (PcdSmmSmramRequire));
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GetStates (&mAccess2.LockState, &mAccess2.OpenState);
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return gBS->InstallMultipleProtocolInterfaces (&ImageHandle,
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&gEfiSmmAccess2ProtocolGuid, &mAccess2,
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NULL);
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}
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@ -0,0 +1,58 @@
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## @file
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# A DXE_DRIVER providing SMRAM access by producing EFI_SMM_ACCESS2_PROTOCOL.
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#
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# Q35 TSEG is expected to have been verified and set up by the SmmAccessPei
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# driver.
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#
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# Copyright (C) 2013, 2015, Red Hat, Inc.
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#
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# This program and the accompanying materials are licensed and made available
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# under the terms and conditions of the BSD License which accompanies this
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# distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
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# WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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##
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = SmmAccess2Dxe
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FILE_GUID = AC95AD3D-4366-44BF-9A62-E4B29D7A2206
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MODULE_TYPE = DXE_DRIVER
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VERSION_STRING = 1.0
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PI_SPECIFICATION_VERSION = 0x00010400
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ENTRY_POINT = SmmAccess2DxeEntryPoint
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#
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# The following information is for reference only and not required by the build tools.
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#
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# VALID_ARCHITECTURES = IA32 X64
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#
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[Sources]
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SmmAccess2Dxe.c
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SmramInternal.c
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SmramInternal.h
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[Packages]
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MdeModulePkg/MdeModulePkg.dec
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MdePkg/MdePkg.dec
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OvmfPkg/OvmfPkg.dec
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[LibraryClasses]
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DebugLib
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PcdLib
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PciLib
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UefiBootServicesTableLib
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UefiDriverEntryPoint
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[Protocols]
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gEfiSmmAccess2ProtocolGuid ## PRODUCES
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[FeaturePcd]
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gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire
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[Depex]
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TRUE
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