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Diffstat (limited to 'MdePkg/Include/Library/SmmMemLib.h')
| -rw-r--r-- | MdePkg/Include/Library/SmmMemLib.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/SmmMemLib.h b/MdePkg/Include/Library/SmmMemLib.h new file mode 100644 index 000000000000..d460ae9577b8 --- /dev/null +++ b/MdePkg/Include/Library/SmmMemLib.h @@ -0,0 +1,138 @@ +/** @file + Provides services for SMM Memory Operation. + + 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. + + Copyright (c) 2015, Intel Corporation. All rights reserved.<BR> + 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_MEM_LIB_H_ +#define _SMM_MEM_LIB_H_ + +/** + This function check if the buffer is valid per processor architecture and not overlap with SMRAM. + + @param Buffer The buffer start address to be checked. + @param Length The buffer length to be checked. + + @retval TRUE This buffer is valid per processor architecture and not overlap with SMRAM. + @retval FALSE This buffer is not valid per processor architecture or overlap with SMRAM. +**/ +BOOLEAN +EFIAPI +SmmIsBufferOutsideSmmValid ( + IN EFI_PHYSICAL_ADDRESS Buffer, + IN UINT64 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. + + @param DestinationBuffer The pointer to the destination buffer of the memory copy. + @param SourceBuffer The pointer to the source buffer of the memory copy. + @param Length The number of bytes to copy from SourceBuffer to DestinationBuffer. + + @retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM. + @retval EFI_SUCCESS Memory is copied. + +**/ +EFI_STATUS +EFIAPI +SmmCopyMemToSmram ( + 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. + + @param DestinationBuffer The pointer to the destination buffer of the memory copy. + @param SourceBuffer The pointer to the source buffer of the memory copy. + @param Length The number of bytes to copy from SourceBuffer to DestinationBuffer. + + @retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM. + @retval EFI_SUCCESS Memory is copied. + +**/ +EFI_STATUS +EFIAPI +SmmCopyMemFromSmram ( + 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. + + @param DestinationBuffer The pointer to the destination buffer of the memory copy. + @param SourceBuffer The pointer to the source buffer of the memory copy. + @param Length The number of bytes to copy from SourceBuffer to DestinationBuffer. + + @retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM. + @retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM. + @retval EFI_SUCCESS Memory is copied. + +**/ +EFI_STATUS +EFIAPI +SmmCopyMem ( + OUT VOID *DestinationBuffer, + IN CONST VOID *SourceBuffer, + IN UINTN Length + ); + +/** + 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. + + @param Buffer The memory to set. + @param Length The number of bytes to set. + @param Value The value with which to fill Length bytes of Buffer. + + @retval EFI_SECURITY_VIOLATION The Buffer is invalid per processor architecture or overlap with SMRAM. + @retval EFI_SUCCESS Memory is set. + +**/ +EFI_STATUS +EFIAPI +SmmSetMem ( + OUT VOID *Buffer, + IN UINTN Length, + IN UINT8 Value + ); + +#endif
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