- Preserving the system integrity, or "locking" the SMRAM, such that the settings cannot be \r
perturbed by either boot service or runtime agents \r
\r
- Copyright (c) 2009, Intel Corporation \r
- All rights reserved. This program and the accompanying materials \r
+ Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r
+ This program and the accompanying materials \r
are licensed and made available under the terms and conditions of the BSD License \r
which accompanies this distribution. The full text of the license may be found at \r
http://opensource.org/licenses/bsd-license.php \r
#ifndef _SMM_ACCESS2_H_\r
#define _SMM_ACCESS2_H_\r
\r
-#include <PiDxe.h>\r
+#include <Protocol/MmAccess.h>\r
\r
-#define EFI_SMM_ACCESS2_PROTOCOL_GUID \\r
- { \\r
- 0xc2702b74, 0x800c, 0x4131, {0x87, 0x46, 0x8f, 0xb5, 0xb8, 0x9c, 0xe4, 0xac } \\r
- }\r
+#define EFI_SMM_ACCESS2_PROTOCOL_GUID EFI_MM_ACCESS_PROTOCOL_GUID\r
\r
-///\r
-/// SMRAM states and capabilities\r
-///\r
-#define EFI_SMRAM_OPEN 0x00000001\r
-#define EFI_SMRAM_CLOSED 0x00000002\r
-#define EFI_SMRAM_LOCKED 0x00000004\r
-#define EFI_CACHEABLE 0x00000008\r
-#define EFI_ALLOCATED 0x00000010\r
-#define EFI_NEEDS_TESTING 0x00000020\r
-#define EFI_NEEDS_ECC_INITIALIZATION 0x00000040\r
+typedef EFI_MM_ACCESS_PROTOCOL EFI_SMM_ACCESS2_PROTOCOL;\r
\r
-///\r
-/// Structure describing a SMRAM region and its accessibility attributes\r
-///\r
-typedef struct {\r
- ///\r
- /// Designates the physical address of the SMRAM in memory. This view of memory is \r
- /// the same as seen by I/O-based agents, for example, but it may not be the address seen \r
- /// by the processors.\r
- ///\r
- EFI_PHYSICAL_ADDRESS PhysicalStart;\r
- ///\r
- /// Designates the address of the SMRAM, as seen by software executing on the \r
- /// processors. This address may or may not match PhysicalStart.\r
- ///\r
- EFI_PHYSICAL_ADDRESS CpuStart; \r
- ///\r
- /// Describes the number of bytes in the SMRAM region.\r
- ///\r
- UINT64 PhysicalSize;\r
- ///\r
- /// Describes the accessibility attributes of the SMRAM. These attributes include the \r
- /// hardware state (e.g., Open/Closed/Locked), capability (e.g., cacheable), logical \r
- /// allocation (e.g., allocated), and pre-use initialization (e.g., needs testing/ECC \r
- /// initialization).\r
- ///\r
- UINT64 RegionState;\r
-} EFI_SMRAM_DESCRIPTOR;\r
+typedef EFI_MM_OPEN EFI_SMM_OPEN2;\r
\r
-typedef struct _EFI_SMM_ACCESS2_PROTOCOL EFI_SMM_ACCESS2_PROTOCOL;\r
+typedef EFI_MM_CLOSE EFI_SMM_CLOSE2;\r
\r
-/**\r
- Opens the SMRAM area to be accessible by a boot-service driver.\r
-\r
- This function "opens" SMRAM so that it is visible while not inside of SMM. The function should \r
- return EFI_UNSUPPORTED if the hardware does not support hiding of SMRAM. The function \r
- should return EFI_DEVICE_ERROR if the SMRAM configuration is locked.\r
-\r
- @param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.\r
-\r
- @retval EFI_SUCCESS The operation was successful.\r
- @retval EFI_UNSUPPORTED The system does not support opening and closing of SMRAM.\r
- @retval EFI_DEVICE_ERROR SMRAM cannot be opened, perhaps because it is locked.\r
-**/\r
-typedef\r
-EFI_STATUS\r
-(EFIAPI *EFI_SMM_OPEN)(\r
- IN CONST EFI_SMM_ACCESS2_PROTOCOL *This\r
- );\r
-\r
-/**\r
- Inhibits access to the SMRAM.\r
-\r
- This function "closes" SMRAM so that it is not visible while outside of SMM. The function should \r
- return EFI_UNSUPPORTED if the hardware does not support hiding of SMRAM.\r
-\r
- @param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.\r
-\r
- @retval EFI_SUCCESS The operation was successful.\r
- @retval EFI_UNSUPPORTED The system does not support opening and closing of SMRAM.\r
- @retval EFI_DEVICE_ERROR SMRAM cannot be closed.\r
-**/\r
-typedef\r
-EFI_STATUS\r
-(EFIAPI *EFI_SMM_CLOSE)(\r
- IN CONST EFI_SMM_ACCESS2_PROTOCOL *This\r
- );\r
-\r
-/**\r
- Inhibits access to the SMRAM.\r
-\r
- This function prohibits access to the SMRAM region. This function is usually implemented such \r
- that it is a write-once operation. \r
-\r
- @param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.\r
-\r
- @retval EFI_SUCCESS The device was successfully locked.\r
- @retval EFI_UNSUPPORTED The system does not support locking of SMRAM.\r
-**/\r
-typedef\r
-EFI_STATUS\r
-(EFIAPI *EFI_SMM_LOCK)(\r
- IN CONST EFI_SMM_ACCESS2_PROTOCOL *This\r
- );\r
-\r
-/**\r
- Queries the memory controller for the possible regions that will support SMRAM.\r
-\r
- @param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.\r
- @param[in,out] SmramMapSize A pointer to the size, in bytes, of the SmramMemoryMap buffer.\r
- @param[in,out] SmramMap A pointer to the buffer in which firmware places the current memory map.\r
-\r
- @retval EFI_SUCCESS The chipset supported the given resource.\r
- @retval EFI_BUFFER_TOO_SMALL The SmramMap parameter was too small. The current buffer size \r
- needed to hold the memory map is returned in SmramMapSize.\r
-**/\r
-typedef\r
-EFI_STATUS\r
-(EFIAPI *EFI_SMM_CAPABILITIES)(\r
- IN CONST EFI_SMM_ACCESS2_PROTOCOL *This,\r
- IN OUT UINTN *SmramMapSize,\r
- IN OUT EFI_SMRAM_DESCRIPTOR *SmramMap\r
- );\r
-\r
-///\r
-/// EFI SMM Access2 Protocol is used to control the visibility of the SMRAM on the platform.\r
-/// It abstracts the location and characteristics of SMRAM. The expectation is\r
-/// that the north bridge or memory controller would publish this protocol.\r
-/// \r
-struct _EFI_SMM_ACCESS2_PROTOCOL {\r
- EFI_SMM_OPEN Open;\r
- EFI_SMM_CLOSE Close;\r
- EFI_SMM_LOCK Lock;\r
- EFI_SMM_CAPABILITIES GetCapabilities;\r
- ///\r
- /// Indicates the current state of the SMRAM. Set to TRUE if SMRAM is locked.\r
- ///\r
- BOOLEAN LockState;\r
- ///\r
- /// Indicates the current state of the SMRAM. Set to TRUE if SMRAM is open.\r
- ///\r
- BOOLEAN OpenState;\r
-};\r
+typedef EFI_MM_LOCK EFI_SMM_LOCK2;\r
\r
+typedef EFI_MM_CAPABILITIES EFI_SMM_CAPABILITIES2;\r
extern EFI_GUID gEfiSmmAccess2ProtocolGuid;\r
\r
#endif\r
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