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/** @file
*
Memory Debug Log Library - Runtime
Copyright (C) 2025, Oracle and/or its affiliates.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <Library/MemDebugLogLib.h>
#include <Library/UefiRuntimeLib.h>
EFI_PHYSICAL_ADDRESS mMemDebugLogBufAddr;
BOOLEAN mMemDebugLogBufAddrInit;
EFI_STATUS
EFIAPI
MemDebugLogWrite (
IN CHAR8 *Buffer,
IN UINTN Length
)
{
EFI_STATUS Status;
//
// Stop logging after we have switched to virtual mode
// to avoid potential problems (such as crashes accessing
// physical pointers).
//
if (EfiGoneVirtual ()) {
return EFI_SUCCESS;
}
if (!mMemDebugLogBufAddrInit) {
//
// Obtain the Memory Debug Log buffer addr from HOB
//
Status = MemDebugLogAddrFromHOB (&mMemDebugLogBufAddr);
if (EFI_ERROR (Status)) {
mMemDebugLogBufAddr = 0;
}
mMemDebugLogBufAddrInit = TRUE;
}
if (mMemDebugLogBufAddr) {
Status = MemDebugLogWriteBuffer (mMemDebugLogBufAddr, Buffer, Length);
} else {
Status = EFI_NOT_FOUND;
}
return Status;
}
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