diff options
Diffstat (limited to 'MdePkg/Library/SmmServicesTableLib')
| -rw-r--r-- | MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c | 104 | ||||
| -rw-r--r-- | MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.inf | 47 |
2 files changed, 151 insertions, 0 deletions
diff --git a/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c b/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c new file mode 100644 index 0000000000..f44dd6ef70 --- /dev/null +++ b/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c @@ -0,0 +1,104 @@ +/** @file
+ SMM Services Table Library.
+
+ Copyright (c) 2009, Intel Corporation<BR>
+ All rights reserved. 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 <PiDxe.h>
+#include <PiSmm.h>
+#include <Protocol/SmmBase2.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/SmmServicesTableLib.h>
+#include <Library/DebugLib.h>
+
+EFI_SMM_SYSTEM_TABLE2 *gSmst = NULL;
+EFI_SMM_BASE2_PROTOCOL *mInternalSmmBase2 = NULL;
+
+
+/**
+ The constructor function caches the pointer of Smm Services Table.
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+SmmServicesTableLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ BOOLEAN InSmm;
+
+ //
+ // Retrieve SMM Base2 Protocol
+ //
+ Status = gBS->LocateProtocol (
+ &gEfiSmmBase2ProtocolGuid,
+ NULL,
+ (VOID **) &mInternalSmmBase2
+ );
+ ASSERT_EFI_ERROR (Status);
+ ASSERT (mInternalSmmBase2 != NULL);
+
+ //
+ // Check to see if we are already in SMM
+ //
+ mInternalSmmBase2->InSmm (mInternalSmmBase2, &InSmm);
+
+ if (!InSmm) {
+ //
+ // We are not in SMM, so SMST is not needed
+ //
+ return EFI_SUCCESS;
+ }
+
+ //
+ // We are in SMM, retrieve the pointer to SMM System Table
+ //
+ mInternalSmmBase2->GetSmstLocation (mInternalSmmBase2, &gSmst);
+
+ ASSERT (gSmst != NULL);
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ This function allows the caller to determine if the driver is executing in
+ System Management Mode(SMM).
+
+ This function returns TRUE if the driver is executing in SMM and FALSE if the
+ driver is not executing in SMM.
+
+ @retval TRUE The driver is executing in System Management Mode (SMM).
+ @retval FALSE The driver is not executing in System Management Mode (SMM).
+
+**/
+BOOLEAN
+EFIAPI
+InSmm (
+ VOID
+ )
+{
+ BOOLEAN InSmm;
+
+ //
+ // Check to see if we are already in SMM
+ //
+ mInternalSmmBase2->InSmm (mInternalSmmBase2, &InSmm);
+
+ return InSmm;
+}
diff --git a/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.inf b/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.inf new file mode 100644 index 0000000000..e0e699b001 --- /dev/null +++ b/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.inf @@ -0,0 +1,47 @@ +#/** @file
+# SMM Services Table Library.
+#
+# Copyright (c) 2009, Intel Corporation.
+#
+# All rights reserved. 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.
+#
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = SmmServicesTableLib
+ FILE_GUID = 064B4C5B-C5EF-4eff-85DF-65518EF1314D
+ MODULE_TYPE = DXE_SMM_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = SmmServicesTableLib|SMM_CORE DXE_SMM_DRIVER
+ EDK_RELEASE_VERSION = 0x00020000
+ EFI_SPECIFICATION_VERSION = 0x00020000
+ PI_SPECIFICATION_VERSION = 0x0001000A
+
+ CONSTRUCTOR = SmmServicesTableLibConstructor
+
+#
+# VALID_ARCHITECTURES = IA32 X64
+#
+
+[Sources.common]
+ SmmServicesTableLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ UefiBootServicesTableLib
+ DebugLib
+
+[Protocols]
+ gEfiSmmBase2ProtocolGuid # PROTOCOL ALWAYS_CONSUMED
+
+[Depex.common.DXE_DRIVER]
+ gEfiSmmBase2ProtocolGuid
|