diff options
author | davidhuang <davidhuang@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-12-23 06:44:33 +0000 |
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committer | davidhuang <davidhuang@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-12-23 06:44:33 +0000 |
commit | b7c5912af1b21abba963fe1a3904d80ecaa41505 (patch) | |
tree | e892daf5aaa156059b6db2bacac6d6c48db9aba9 /MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c | |
parent | 2983a79df5840d344194da662e34877483bda903 (diff) | |
download | edk2-platforms-b7c5912af1b21abba963fe1a3904d80ecaa41505.tar.xz |
PI 1.1 SMM Feature Check-in
1. Add SmmServicesTableLib library class/instance.
2. Add SmmIoLibCpuIo/SmmPciLibPciRootBridgeIo library instance.
3. Update some library INF to support SMM_CORE module type.
4. Update dec/dsc to include new modules.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9590 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c')
-rw-r--r-- | MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c | 104 |
1 files changed, 104 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;
+}
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