Tpm12Support.c

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#include <Library/BaseLib.h>
#include <Library/Tpm12DeviceLib.h>
 
#include "Tpm12Support.h"
 
#pragma pack (1)
typedef struct {
  TPM_RSP_COMMAND_HDR    Hdr;
  TPM_CURRENT_TICKS      CurrentTicks;
} TPM_RSP_GET_TICKS;
#pragma pack ()
 
STATIC
EFI_STATUS
TestTpm12 (
  )
{
  EFI_STATUS           Status;
  TPM_RQU_COMMAND_HDR  Command;
  TPM_RSP_GET_TICKS    Response;
  UINT32               Length;
 
  Command.tag       = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  Command.paramSize = SwapBytes32 (sizeof (Command));
  Command.ordinal   = SwapBytes32 (TPM_ORD_GetTicks);
 
  Length = sizeof (Response);
  Status = Tpm12SubmitCommand (
             sizeof (Command),
             (UINT8 *)&Command,
             &Length,
             (UINT8 *)&Response
             );
  if (EFI_ERROR (Status)) {
    return Status;
  }
 
  return EFI_SUCCESS;
}
 
EFI_STATUS
InternalTpm12Detect (
  VOID
  )
{
  EFI_STATUS  Status;
 
  Status = Tpm12RequestUseTpm ();
  if (EFI_ERROR (Status)) {
    return Status;
  }
 
  return TestTpm12 ();
}