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/*
* tpm_tis.h - QEMU's TPM TIS common header
*
* Copyright (C) 2006,2010-2013 IBM Corporation
*
* Authors:
* Stefan Berger <stefanb@us.ibm.com>
* David Safford <safford@us.ibm.com>
*
* Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at>
*
* 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. This implementation currently
* supports version 1.3, 21 March 2013
* In the developers menu choose the PC Client section then find the TIS
* specification.
*
* TPM TIS for TPM 2 implementation following TCG PC Client Platform
* TPM Profile (PTP) Specification, Familiy 2.0, Revision 00.43
*/
#ifndef TPM_TPM_TIS_H
#define TPM_TPM_TIS_H
#include "qemu/osdep.h"
#include "sysemu/tpm_backend.h"
#include "tpm_ppi.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;
/* 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;
} TPMLocality;
typedef struct TPMState {
MemoryRegion mmio;
unsigned char buffer[TPM_TIS_BUFFER_MAX];
uint16_t rw_offset;
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;
TPMBackendCmd cmd;
TPMBackend *be_driver;
TPMVersion be_tpm_version;
size_t be_buffer_size;
bool ppi_enabled;
TPMPPI ppi;
} TPMState;
extern const VMStateDescription vmstate_locty;
extern const MemoryRegionOps tpm_tis_memory_ops;
int tpm_tis_pre_save(TPMState *s);
void tpm_tis_reset(TPMState *s);
enum TPMVersion tpm_tis_get_tpm_version(TPMState *s);
void tpm_tis_request_completed(TPMState *s, int ret);
#endif /* TPM_TPM_TIS_H */
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