TPM_STS
tpm_put8(tpm, TPM_STS, TPM_STS_GO);
return (tpm_get8(tpm, TPM_STS));
burstcnt = tpm_get8(tpm, TPM_STS + 1);
burstcnt += tpm_get8(tpm, TPM_STS + 2) << 8;
tpm_put8(tpm, TPM_STS, TPM_STS_CMD_READY);
tpm_put8(tpm, TPM_STS, TPM_STS_RESPONSE_RETRY);