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/*

 * tpm_tis.h - QEMU's TPM TIS interface emulator

 *

 * Copyright (C) 2006, 2010-2013 IBM Corporation

 *

 * Authors:

 *  Stefan Berger <stefanb@us.ibm.com>

 *  David Safford <safford@us.ibm.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or later.

 * See the COPYING file in the top-level directory.

 *

 * Implementation of the TIS interface according to specs found at

 * http://www.trustedcomputinggroup.org

 *

 */

#ifndef TPM_TPM_TIS_H

#define TPM_TPM_TIS_H

#include "hw/isa/isa.h"

#include "qemu-common.h"

#define TPM_TIS_ADDR_BASE           0xFED40000

#define TPM_TIS_NUM_LOCALITIES      5     /* per spec */

#define TPM_TIS_LOCALITY_SHIFT      12

#define TPM_TIS_NO_LOCALITY         0xff

#define TPM_TIS_IS_VALID_LOCTY(x)   ((x) < TPM_TIS_NUM_LOCALITIES)

#define TPM_TIS_IRQ                 5

#define TPM_TIS_BUFFER_MAX          4096

#define TYPE_TPM_TIS                "tpm-tis"

typedef enum {

    TPM_TIS_STATE_IDLE = 0,

    TPM_TIS_STATE_READY,

    TPM_TIS_STATE_COMPLETION,

    TPM_TIS_STATE_EXECUTION,

    TPM_TIS_STATE_RECEPTION,

} TPMTISState;

/* locality data  -- all fields are persisted */

typedef struct TPMLocality {

    TPMTISState state;

    uint8_t access;

    uint8_t sts;

    uint32_t inte;

    uint32_t ints;

    uint16_t w_offset;

    uint16_t r_offset;

    TPMSizedBuffer w_buffer;

    TPMSizedBuffer r_buffer;

} TPMLocality;

typedef struct TPMTISEmuState {

    QEMUBH *bh;

    uint32_t offset;

    uint8_t buf[TPM_TIS_BUFFER_MAX];

    uint8_t active_locty;

    uint8_t aborting_locty;

    uint8_t next_locty;

    TPMLocality loc[TPM_TIS_NUM_LOCALITIES];

    qemu_irq irq;

    uint32_t irq_num;

} TPMTISEmuState;

#endif /* TPM_TPM_TIS_H */