AIKData.c

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#include "AIKData.h"
 
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
 
VOID
AIKDataReset (
  IN OUT AIK_DATA  *Data
  )
{
  Data->KeyBufferHead = Data->KeyBufferTail = Data->KeyBuffer;
  Data->KeyBufferSize = 0;
}
 
BOOLEAN
AIKDataEmpty (
  IN AIK_DATA  *Data
  )
{
  return Data->KeyBufferSize == 0;
}
 
EFI_STATUS
AIKDataReadEntry (
  IN OUT AIK_DATA       *Data,
  OUT AMI_EFI_KEY_DATA  *KeyData
  )
{
  if (Data->KeyBufferSize == 0) {
    return EFI_NOT_READY;
  }
 
  CopyMem (KeyData, Data->KeyBufferTail, sizeof (*KeyData));
 
  Data->KeyBufferSize--;
  Data->KeyBufferTail++;
  if (Data->KeyBufferTail == &Data->KeyBuffer[AIK_DATA_BUFFER_SIZE]) {
    Data->KeyBufferTail = Data->KeyBuffer;
  }
 
  return EFI_SUCCESS;
}
 
VOID
AIKDataWriteEntry (
  IN OUT AIK_DATA          *Data,
  IN     AMI_EFI_KEY_DATA  *KeyData
  )
{
  //
  // Eat the first entry if we have no room
  //
  if (Data->KeyBufferSize == AIK_DATA_BUFFER_SIZE) {
    Data->KeyBufferSize--;
    Data->KeyBufferTail++;
    if (Data->KeyBufferTail == &Data->KeyBuffer[AIK_DATA_BUFFER_SIZE]) {
      Data->KeyBufferTail = Data->KeyBuffer;
    }
  }
 
  Data->KeyBufferSize++;
  CopyMem (Data->KeyBufferHead, KeyData, sizeof (*KeyData));
  Data->KeyBufferHead++;
  if (Data->KeyBufferHead == &Data->KeyBuffer[AIK_DATA_BUFFER_SIZE]) {
    Data->KeyBufferHead = Data->KeyBuffer;
  }
}