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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 "hw/acpi/tpm.h"
#include "qemu-common.h"
#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_BUFFER_MAX 4096
typedef enum {
TPM_TIS_STATE_IDLE = 0,
TPM_TIS_STATE_READY,
TPM_TIS_STATE_COMPLETION,
TPM_TIS_STATE_EXECUTION,
TPM_TIS_STATE_RECEPTION,
} TPMTISState;
typedef struct TPMSizedBuffer {
uint32_t size;
uint8_t *buffer;
} TPMSizedBuffer;
/* locality data -- all fields are persisted */
typedef struct TPMLocality {
TPMTISState state;
uint8_t access;
uint32_t sts;
uint32_t iface_id;
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 */
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