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133 lines
5.0 KiB
C
133 lines
5.0 KiB
C
/** @file
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Provides services for SMM Memory Operation.
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The SMM Mem Library provides function for checking if buffer is outside SMRAM and valid.
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It also provides functions for copy data from SMRAM to non-SMRAM, from non-SMRAM to SMRAM,
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from non-SMRAM to non-SMRAM, or set data in non-SMRAM.
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Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _SMM_MEM_LIB_H_
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#define _SMM_MEM_LIB_H_
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/**
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This function check if the buffer is valid per processor architecture and not overlap with SMRAM.
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@param Buffer The buffer start address to be checked.
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@param Length The buffer length to be checked.
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@retval TRUE This buffer is valid per processor architecture and not overlap with SMRAM.
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@retval FALSE This buffer is not valid per processor architecture or overlap with SMRAM.
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**/
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BOOLEAN
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EFIAPI
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SmmIsBufferOutsideSmmValid (
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IN EFI_PHYSICAL_ADDRESS Buffer,
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IN UINT64 Length
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);
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/**
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Copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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It checks if source buffer is valid per processor architecture and not overlap with SMRAM.
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If the check passes, it copies memory and returns EFI_SUCCESS.
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If the check fails, it return EFI_SECURITY_VIOLATION.
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The implementation must be reentrant.
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@param DestinationBuffer The pointer to the destination buffer of the memory copy.
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@param SourceBuffer The pointer to the source buffer of the memory copy.
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@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
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@retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is copied.
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**/
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EFI_STATUS
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EFIAPI
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SmmCopyMemToSmram (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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);
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/**
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Copies a source buffer (SMRAM) to a destination buffer (NON-SMRAM).
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This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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It checks if destination buffer is valid per processor architecture and not overlap with SMRAM.
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If the check passes, it copies memory and returns EFI_SUCCESS.
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If the check fails, it returns EFI_SECURITY_VIOLATION.
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The implementation must be reentrant.
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@param DestinationBuffer The pointer to the destination buffer of the memory copy.
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@param SourceBuffer The pointer to the source buffer of the memory copy.
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@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
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@retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is copied.
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**/
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EFI_STATUS
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EFIAPI
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SmmCopyMemFromSmram (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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);
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/**
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Copies a source buffer (NON-SMRAM) to a destination buffer (NON-SMRAM).
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This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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It checks if source buffer and destination buffer are valid per processor architecture and not overlap with SMRAM.
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If the check passes, it copies memory and returns EFI_SUCCESS.
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If the check fails, it returns EFI_SECURITY_VIOLATION.
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The implementation must be reentrant, and it must handle the case where source buffer overlaps destination buffer.
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@param DestinationBuffer The pointer to the destination buffer of the memory copy.
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@param SourceBuffer The pointer to the source buffer of the memory copy.
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@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
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@retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is copied.
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**/
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EFI_STATUS
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EFIAPI
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SmmCopyMem (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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);
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/**
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Fills a target buffer (NON-SMRAM) with a byte value.
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This function fills a target buffer (non-SMRAM) with a byte value.
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It checks if target buffer is valid per processor architecture and not overlap with SMRAM.
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If the check passes, it fills memory and returns EFI_SUCCESS.
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If the check fails, it returns EFI_SECURITY_VIOLATION.
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@param Buffer The memory to set.
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@param Length The number of bytes to set.
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@param Value The value with which to fill Length bytes of Buffer.
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@retval EFI_SECURITY_VIOLATION The Buffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is set.
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**/
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EFI_STATUS
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EFIAPI
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SmmSetMem (
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OUT VOID *Buffer,
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IN UINTN Length,
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IN UINT8 Value
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);
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#endif
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