diff options
Diffstat (limited to 'MdePkg/Include/Protocol/SmmAccess2.h')
| -rw-r--r-- | MdePkg/Include/Protocol/SmmAccess2.h | 103 |
1 files changed, 7 insertions, 96 deletions
diff --git a/MdePkg/Include/Protocol/SmmAccess2.h b/MdePkg/Include/Protocol/SmmAccess2.h index 5904266ba0..3dc15fe597 100644 --- a/MdePkg/Include/Protocol/SmmAccess2.h +++ b/MdePkg/Include/Protocol/SmmAccess2.h @@ -25,108 +25,19 @@ #ifndef _SMM_ACCESS2_H_
#define _SMM_ACCESS2_H_
-#define EFI_SMM_ACCESS2_PROTOCOL_GUID \
- { \
- 0xc2702b74, 0x800c, 0x4131, {0x87, 0x46, 0x8f, 0xb5, 0xb8, 0x9c, 0xe4, 0xac } \
- }
+#include <Protocol/MmAccess.h>
+#define EFI_SMM_ACCESS2_PROTOCOL_GUID EFI_MM_ACCESS_PROTOCOL_GUID
-typedef struct _EFI_SMM_ACCESS2_PROTOCOL EFI_SMM_ACCESS2_PROTOCOL;
+typedef EFI_MM_ACCESS_PROTOCOL EFI_SMM_ACCESS2_PROTOCOL;
-/**
- Opens the SMRAM area to be accessible by a boot-service driver.
+typedef EFI_MM_OPEN EFI_SMM_OPEN2;
- This function "opens" SMRAM so that it is visible while not inside of SMM. The function should
- return EFI_UNSUPPORTED if the hardware does not support hiding of SMRAM. The function
- should return EFI_DEVICE_ERROR if the SMRAM configuration is locked.
+typedef EFI_MM_CLOSE EFI_SMM_CLOSE2;
- @param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.
-
- @retval EFI_SUCCESS The operation was successful.
- @retval EFI_UNSUPPORTED The system does not support opening and closing of SMRAM.
- @retval EFI_DEVICE_ERROR SMRAM cannot be opened, perhaps because it is locked.
-**/
-typedef
-EFI_STATUS
-(EFIAPI *EFI_SMM_OPEN2)(
- IN EFI_SMM_ACCESS2_PROTOCOL *This
- );
-
-/**
- Inhibits access to the SMRAM.
-
- This function "closes" SMRAM so that it is not visible while outside of SMM. The function should
- return EFI_UNSUPPORTED if the hardware does not support hiding of SMRAM.
-
- @param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.
-
- @retval EFI_SUCCESS The operation was successful.
- @retval EFI_UNSUPPORTED The system does not support opening and closing of SMRAM.
- @retval EFI_DEVICE_ERROR SMRAM cannot be closed.
-**/
-typedef
-EFI_STATUS
-(EFIAPI *EFI_SMM_CLOSE2)(
- IN EFI_SMM_ACCESS2_PROTOCOL *This
- );
-
-/**
- Inhibits access to the SMRAM.
-
- This function prohibits access to the SMRAM region. This function is usually implemented such
- that it is a write-once operation.
-
- @param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.
-
- @retval EFI_SUCCESS The device was successfully locked.
- @retval EFI_UNSUPPORTED The system does not support locking of SMRAM.
-**/
-typedef
-EFI_STATUS
-(EFIAPI *EFI_SMM_LOCK2)(
- IN EFI_SMM_ACCESS2_PROTOCOL *This
- );
-
-/**
- Queries the memory controller for the possible regions that will support SMRAM.
-
- @param[in] This The EFI_SMM_ACCESS2_PROTOCOL instance.
- @param[in,out] SmramMapSize A pointer to the size, in bytes, of the SmramMemoryMap buffer.
- @param[in,out] SmramMap A pointer to the buffer in which firmware places the current memory map.
-
- @retval EFI_SUCCESS The chipset supported the given resource.
- @retval EFI_BUFFER_TOO_SMALL The SmramMap parameter was too small. The current buffer size
- needed to hold the memory map is returned in SmramMapSize.
-**/
-typedef
-EFI_STATUS
-(EFIAPI *EFI_SMM_CAPABILITIES2)(
- IN CONST EFI_SMM_ACCESS2_PROTOCOL *This,
- IN OUT UINTN *SmramMapSize,
- IN OUT EFI_SMRAM_DESCRIPTOR *SmramMap
- );
-
-///
-/// EFI SMM Access2 Protocol is used to control the visibility of the SMRAM on the platform.
-/// It abstracts the location and characteristics of SMRAM. The platform should report all
-/// MMRAM via EFI_MM_ACCESS_PROTOCOL. The expectation is that the north bridge or memory
-/// controller would publish this protocol.
-///
-struct _EFI_SMM_ACCESS2_PROTOCOL {
- EFI_SMM_OPEN2 Open;
- EFI_SMM_CLOSE2 Close;
- EFI_SMM_LOCK2 Lock;
- EFI_SMM_CAPABILITIES2 GetCapabilities;
- ///
- /// Indicates the current state of the SMRAM. Set to TRUE if SMRAM is locked.
- ///
- BOOLEAN LockState;
- ///
- /// Indicates the current state of the SMRAM. Set to TRUE if SMRAM is open.
- ///
- BOOLEAN OpenState;
-};
+typedef EFI_MM_LOCK EFI_SMM_LOCK2;
+typedef EFI_MM_CAPABILITIES EFI_SMM_CAPABILITIES2;
extern EFI_GUID gEfiSmmAccess2ProtocolGuid;
#endif
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