diff options
Diffstat (limited to 'MdePkg')
| -rw-r--r-- | MdePkg/Include/Protocol/SmmBase2.h | 87 | ||||
| -rw-r--r-- | MdePkg/MdePkg.dec | 3 |
2 files changed, 90 insertions, 0 deletions
diff --git a/MdePkg/Include/Protocol/SmmBase2.h b/MdePkg/Include/Protocol/SmmBase2.h new file mode 100644 index 0000000000..dc1b218774 --- /dev/null +++ b/MdePkg/Include/Protocol/SmmBase2.h @@ -0,0 +1,87 @@ +/** @file
+ EFI SMM Base2 Protocol as defined in the PI 1.2 specification.
+
+ This protocol is utilized by all SMM drivers to locate the SMM infrastructure services and determine
+ whether the driver is being invoked inside SMRAM or outside of SMRAM.
+
+ 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.
+
+**/
+
+#ifndef _SMM_BASE2_H_
+#define _SMM_BASE2_H_
+
+#include <Pi/PiSmmCis.h>
+
+#define EFI_SMM_BASE2_PROTOCOL_GUID \
+ { \
+ 0xf4ccbfb7, 0xf6e0, 0x47fd, {0x9d, 0xd4, 0x10, 0xa8, 0xf1, 0x50, 0xc1, 0x91 } \
+ }
+
+typedef struct _EFI_SMM_BASE2_PROTOCOL EFI_SMM_BASE2_PROTOCOL;
+
+/**
+ Service to indicate whether the driver is currently executing in the SMM Initialization phase.
+
+ This service is used to indicate whether the driver is currently executing in the SMM Initialization
+ phase. For SMM drivers, this will return TRUE in InSmram while inside the driver's entry point and
+ otherwise FALSE. For combination SMM/DXE drivers, this will return FALSE in the DXE launch. For the
+ SMM launch, it behaves as an SMM driver.
+
+ @param[in] This The EFI_SMM_BASE2_PROTOCOL instance.
+ @param[out] InSmram Pointer to a Boolean which, on return, indicates that the driver is
+ currently executing inside of SMRAM (TRUE) or outside of SMRAM (FALSE).
+
+ @retval EFI_SUCCESS The call returned successfully.
+ @retval EFI_INVALID_PARAMETER InSmram was NULL.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SMM_INSIDE_OUT)(
+ IN CONST EFI_SMM_BASE2_PROTOCOL *This,
+ OUT BOOLEAN *InSmram
+ )
+;
+
+/**
+ Returns the location of the System Management Service Table (SMST).
+
+ This function returns the location of the System Management Service Table (SMST). The use of the
+ API is such that a driver can discover the location of the SMST in its entry point and then cache it in
+ some driver global variable so that the SMST can be invoked in subsequent handlers.
+
+ @param[in] This The EFI_SMM_BASE2_PROTOCOL instance.
+ @param[in,out] Smst On return, points to a pointer to the System Management Service Table (SMST).
+
+ @retval EFI_SUCCESS The operation was successful.
+ @retval EFI_INVALID_PARAMETER Smst was invalid.
+ @retval EFI_UNSUPPORTED Not in SMM.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SMM_GET_SMST_LOCATION)(
+ IN CONST EFI_SMM_BASE2_PROTOCOL *This,
+ IN OUT EFI_SMM_SYSTEM_TABLE **Smst
+ )
+;
+
+///
+/// EFI SMM Base2 Protocol is utilized by all SMM drivers to locate the SMM infrastructure
+/// services and determine whether the driver is being invoked inside SMRAM or outside of SMRAM.
+///
+struct _EFI_SMM_BASE2_PROTOCOL {
+ EFI_SMM_INSIDE_OUT InSmm;
+ EFI_SMM_GET_SMST_LOCATION GetSmstLocation;
+};
+
+extern EFI_GUID gEfiSmmBase2ProtocolGuid;
+
+#endif
+
diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec index b6c7ac37a4..a0c8c68230 100644 --- a/MdePkg/MdePkg.dec +++ b/MdePkg/MdePkg.dec @@ -578,6 +578,9 @@ ## Include/Protocol/SmmCpuIo.h
gEfiSmmCpuIoProtocolGuid = { 0x3242a9d8, 0xce70, 0x4aa0, { 0x95, 0x5d, 0x5e, 0x7b, 0x14, 0x0d, 0xe4, 0xd2 }}
+ ## Include/Protocol/SmmBase2.h
+ gEfiSmmBase2ProtocolGuid = { 0xf4ccbfb7, 0xf6e0, 0x47fd, {0x9d, 0xd4, 0x10, 0xa8, 0xf1, 0x50, 0xc1, 0x91 }}
+
#
# Protocols defined in UEFI2.1/UEFI2.0/EFI1.1
#
|