MemoryStatusCodeWorker.c

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#include "StatusCodeHandlerMm.h"
 
RUNTIME_MEMORY_STATUSCODE_HEADER  *mMmMemoryStatusCodeTable;
 
EFI_STATUS
MemoryStatusCodeInitializeWorker (
  VOID
  )
{
  EFI_STATUS  Status;
 
  //
  // Allocate MM memory status code pool.
  //
  mMmMemoryStatusCodeTable = (RUNTIME_MEMORY_STATUSCODE_HEADER *)AllocateZeroPool (sizeof (RUNTIME_MEMORY_STATUSCODE_HEADER) + PcdGet16 (PcdStatusCodeMemorySize) * 1024);
  ASSERT (mMmMemoryStatusCodeTable != NULL);
 
  mMmMemoryStatusCodeTable->MaxRecordsNumber = (PcdGet16 (PcdStatusCodeMemorySize) * 1024) / sizeof (MEMORY_STATUSCODE_RECORD);
  Status                                     = gMmst->MmInstallConfigurationTable (
                                                        gMmst,
                                                        &gMemoryStatusCodeRecordGuid,
                                                        &mMmMemoryStatusCodeTable,
                                                        sizeof (mMmMemoryStatusCodeTable)
                                                        );
  return Status;
}
 
EFI_STATUS
EFIAPI
MemoryStatusCodeReportWorker (
  IN EFI_STATUS_CODE_TYPE   CodeType,
  IN EFI_STATUS_CODE_VALUE  Value,
  IN UINT32                 Instance,
  IN EFI_GUID               *CallerId,
  IN EFI_STATUS_CODE_DATA   *Data OPTIONAL
  )
{
  MEMORY_STATUSCODE_RECORD  *Record;
 
  //
  // Locate current record buffer.
  //
  Record = (MEMORY_STATUSCODE_RECORD *)(mMmMemoryStatusCodeTable + 1);
  Record = &Record[mMmMemoryStatusCodeTable->RecordIndex++];
 
  //
  // Save status code.
  //
  Record->CodeType = CodeType;
  Record->Value    = Value;
  Record->Instance = Instance;
 
  //
  // If record index equals to max record number, then wrap around record index to zero.
  //
  // The reader of status code should compare the number of records with max records number,
  // If it is equal to or larger than the max number, then the wrap-around had happened,
  // so the first record is pointed by record index.
  // If it is less then max number, index of the first record is zero.
  //
  mMmMemoryStatusCodeTable->NumberOfRecords++;
  if (mMmMemoryStatusCodeTable->RecordIndex == mMmMemoryStatusCodeTable->MaxRecordsNumber) {
    //
    // Wrap around record index.
    //
    mMmMemoryStatusCodeTable->RecordIndex = 0;
  }
 
  return EFI_SUCCESS;
}