ba05ea83b7
Add the Memory Debug Logging feature MemDebugLogLib library which provides the key MemDebugLogWrite() function. Several versions (i.e. SEC, PEIM, DXE, runtime) of the function are included to provide the proper method to write the debug messages to the memory debug log buffer. The library also provides the core functions to maintain the circular memory debug log buffer. Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Jiewen Yao <jiewen.yao@intel.com> Signed-off-by: Aaron Young <aaron.young@oracle.com>
49 lines
986 B
C
49 lines
986 B
C
/** @file
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*
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Memory Debug Log Library - SEC Phase
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Copyright (C) 2025, Oracle and/or its affiliates.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/MemDebugLogLib.h>
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EFI_STATUS
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EFIAPI
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MemDebugLogWrite (
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IN CHAR8 *Buffer,
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IN UINTN Length
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)
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{
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EFI_STATUS Status;
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if (FixedPcdGet32 (PcdOvmfEarlyMemDebugLogBase) != 0x0) {
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Status = MemDebugLogWriteBuffer (
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(EFI_PHYSICAL_ADDRESS)(UINTN)FixedPcdGet32 (PcdOvmfEarlyMemDebugLogBase),
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Buffer,
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Length
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);
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} else {
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Status = EFI_NOT_FOUND;
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}
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return Status;
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}
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RETURN_STATUS
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EFIAPI
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MemDebugLogLibConstructor (
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VOID
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)
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{
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if (FixedPcdGet32 (PcdOvmfEarlyMemDebugLogSize) != 0) {
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MemDebugLogInit (
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(EFI_PHYSICAL_ADDRESS)(UINTN)FixedPcdGet32 (PcdOvmfEarlyMemDebugLogBase),
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(UINT32)FixedPcdGet32 (PcdOvmfEarlyMemDebugLogSize)
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);
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}
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return RETURN_SUCCESS;
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}
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