Functions | |
BOOLEAN EFIAPI | SmmIsBufferOutsideSmmValid (IN EFI_PHYSICAL_ADDRESS Buffer, IN UINT64 Length) |
EFI_STATUS EFIAPI | SmmCopyMemToSmram (OUT VOID *DestinationBuffer, IN CONST VOID *SourceBuffer, IN UINTN Length) |
EFI_STATUS EFIAPI | SmmCopyMemFromSmram (OUT VOID *DestinationBuffer, IN CONST VOID *SourceBuffer, IN UINTN Length) |
EFI_STATUS EFIAPI | SmmCopyMem (OUT VOID *DestinationBuffer, IN CONST VOID *SourceBuffer, IN UINTN Length) |
EFI_STATUS EFIAPI | SmmSetMem (OUT VOID *Buffer, IN UINTN Length, IN UINT8 Value) |
The SMM Mem Library provides function for checking if buffer is outside SMRAM and valid. It also provides functions for copy data from SMRAM to non-SMRAM, from non-SMRAM to SMRAM, from non-SMRAM to non-SMRAM, or set data in non-SMRAM.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
EFI_STATUS EFIAPI SmmCopyMem | ( | OUT VOID * | DestinationBuffer, | |
IN CONST VOID * | SourceBuffer, | |||
IN UINTN | Length | |||
) |
Copies a source buffer (NON-SMRAM) to a destination buffer (NON-SMRAM).
This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM). It checks if source buffer and destination buffer are valid per processor architecture and not overlap with SMRAM. If the check passes, it copies memory and returns EFI_SUCCESS. If the check fails, it returns EFI_SECURITY_VIOLATION. The implementation must be reentrant, and it must handle the case where source buffer overlaps destination buffer.
DestinationBuffer | The pointer to the destination buffer of the memory copy. | |
SourceBuffer | The pointer to the source buffer of the memory copy. | |
Length | The number of bytes to copy from SourceBuffer to DestinationBuffer. |
EFI_SECURITY_VIOLATION | The DesinationBuffer is invalid per processor architecture or overlap with SMRAM. | |
EFI_SECURITY_VIOLATION | The SourceBuffer is invalid per processor architecture or overlap with SMRAM. | |
EFI_SUCCESS | Memory is copied. |
EFI_STATUS EFIAPI SmmCopyMemFromSmram | ( | OUT VOID * | DestinationBuffer, | |
IN CONST VOID * | SourceBuffer, | |||
IN UINTN | Length | |||
) |
Copies a source buffer (SMRAM) to a destination buffer (NON-SMRAM).
This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM). It checks if destination buffer is valid per processor architecture and not overlap with SMRAM. If the check passes, it copies memory and returns EFI_SUCCESS. If the check fails, it returns EFI_SECURITY_VIOLATION. The implementation must be reentrant.
DestinationBuffer | The pointer to the destination buffer of the memory copy. | |
SourceBuffer | The pointer to the source buffer of the memory copy. | |
Length | The number of bytes to copy from SourceBuffer to DestinationBuffer. |
EFI_SECURITY_VIOLATION | The DesinationBuffer is invalid per processor architecture or overlap with SMRAM. | |
EFI_SUCCESS | Memory is copied. |
EFI_STATUS EFIAPI SmmCopyMemToSmram | ( | OUT VOID * | DestinationBuffer, | |
IN CONST VOID * | SourceBuffer, | |||
IN UINTN | Length | |||
) |
Copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM). It checks if source buffer is valid per processor architecture and not overlap with SMRAM. If the check passes, it copies memory and returns EFI_SUCCESS. If the check fails, it return EFI_SECURITY_VIOLATION. The implementation must be reentrant.
DestinationBuffer | The pointer to the destination buffer of the memory copy. | |
SourceBuffer | The pointer to the source buffer of the memory copy. | |
Length | The number of bytes to copy from SourceBuffer to DestinationBuffer. |
EFI_SECURITY_VIOLATION | The SourceBuffer is invalid per processor architecture or overlap with SMRAM. | |
EFI_SUCCESS | Memory is copied. |
BOOLEAN EFIAPI SmmIsBufferOutsideSmmValid | ( | IN EFI_PHYSICAL_ADDRESS | Buffer, | |
IN UINT64 | Length | |||
) |
This function check if the buffer is valid per processor architecture and not overlap with SMRAM.
Buffer | The buffer start address to be checked. | |
Length | The buffer length to be checked. |
TRUE | This buffer is valid per processor architecture and not overlap with SMRAM. | |
FALSE | This buffer is not valid per processor architecture or overlap with SMRAM. |
EFI_STATUS EFIAPI SmmSetMem | ( | OUT VOID * | Buffer, | |
IN UINTN | Length, | |||
IN UINT8 | Value | |||
) |
Fills a target buffer (NON-SMRAM) with a byte value.
This function fills a target buffer (non-SMRAM) with a byte value. It checks if target buffer is valid per processor architecture and not overlap with SMRAM. If the check passes, it fills memory and returns EFI_SUCCESS. If the check fails, it returns EFI_SECURITY_VIOLATION.
Buffer | The memory to set. | |
Length | The number of bytes to set. | |
Value | The value with which to fill Length bytes of Buffer. |
EFI_SECURITY_VIOLATION | The Buffer is invalid per processor architecture or overlap with SMRAM. | |
EFI_SUCCESS | Memory is set. |