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/* Copyright 2018 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __EC_BOARD_CR50_TPM2_VIRTUAL_NVMEM_H
#define __EC_BOARD_CR50_TPM2_VIRTUAL_NVMEM_H
/*
* Currently supported virtual NV indexes.
*
* The range for virtual NV indexes is chosen such that all indexes
* fall within a range designated by the TCG for use by TPM manufacturers,
* without expectation of consultation with the TCG, or consistent behavior
* across TPM models. See Table 3 in the 'Registry of reserved TPM 2.0
* handles and localities' for more details.
*
* To return data, entries in this enum must be registered in virtual_nvmem.c.
*
* Values in this enum must be consecutive.
*/
enum virtual_nv_index {
VIRTUAL_NV_INDEX_START = 0x013fff00,
VIRTUAL_NV_INDEX_BOARD_ID = VIRTUAL_NV_INDEX_START,
VIRTUAL_NV_INDEX_SN_DATA,
VIRTUAL_NV_INDEX_G2F_CERT,
VIRTUAL_NV_INDEX_RSU_DEV_ID,
/* Reserved for generic TPM2.0 stand-alone counter. */
/* TODO(b/191163997): support reading RMA bytes via this index. */
/* VIRTUAL_NV_INDEX_RMA_BYTES = 0x013fff04, */
VIRTUAL_NV_INDEX_END,
};
/* Reserved space for future virtual indexes; this is the last valid index. */
#define VIRTUAL_NV_INDEX_MAX 0x013fffff
/*
* Data sizes (in bytes) of currently defined indexes.
*/
#define VIRTUAL_NV_INDEX_BOARD_ID_SIZE 12
#define VIRTUAL_NV_INDEX_SN_DATA_SIZE 16
#define VIRTUAL_NV_INDEX_G2F_CERT_SIZE 315
#define VIRTUAL_NV_INDEX_RSU_DEV_ID_SIZE 32
#endif /* __EC_BOARD_CR50_TPM2_VIRTUAL_NVMEM_H */
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