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1 /*
2  * tpm_tis.h - QEMU's TPM TIS interface emulator
3  *
4  * Copyright (C) 2006, 2010-2013 IBM Corporation
5  *
6  * Authors:
7  *  Stefan Berger <[email protected]>
8  *  David Safford <[email protected]>
9  *
10  * This work is licensed under the terms of the GNU GPL, version 2 or later.
11  * See the COPYING file in the top-level directory.
12  *
13  * Implementation of the TIS interface according to specs found at
14  * http://www.trustedcomputinggroup.org
15  *
16  */
17 #ifndef TPM_TPM_TIS_H
18 #define TPM_TPM_TIS_H
19
20 #include "hw/isa.h"
21 #include "qemu-common.h"
22
23 #define TPM_TIS_ADDR_BASE           0xFED40000
24
25 #define TPM_TIS_NUM_LOCALITIES      5     /* per spec */
26 #define TPM_TIS_LOCALITY_SHIFT      12
27 #define TPM_TIS_NO_LOCALITY         0xff
28
29 #define TPM_TIS_IS_VALID_LOCTY(x)   ((x) < TPM_TIS_NUM_LOCALITIES)
30
31 #define TPM_TIS_IRQ                 5
32
33 #define TPM_TIS_BUFFER_MAX          4096
34
35 #define TYPE_TPM_TIS                "tpm-tis"
36
37
38 struct TPMSizedBuffer {
39     uint32_t size;
40     uint8_t  *buffer;
41 };
42
43 typedef enum {
44     TPM_TIS_STATE_IDLE = 0,
45     TPM_TIS_STATE_READY,
46     TPM_TIS_STATE_COMPLETION,
47     TPM_TIS_STATE_EXECUTION,
48     TPM_TIS_STATE_RECEPTION,
49 } TPMTISState;
50
51 /* locality data  -- all fields are persisted */
52 typedef struct TPMLocality {
53     TPMTISState state;
54     uint8_t access;
55     uint8_t sts;
56     uint32_t inte;
57     uint32_t ints;
58
59     uint16_t w_offset;
60     uint16_t r_offset;
61     TPMSizedBuffer w_buffer;
62     TPMSizedBuffer r_buffer;
63 } TPMLocality;
64
65 typedef struct TPMTISEmuState {
66     QEMUBH *bh;
67     uint32_t offset;
68     uint8_t buf[TPM_TIS_BUFFER_MAX];
69
70     uint8_t active_locty;
71     uint8_t aborting_locty;
72     uint8_t next_locty;
73
74     TPMLocality loc[TPM_TIS_NUM_LOCALITIES];
75
76     qemu_irq irq;
77     uint32_t irq_num;
78 } TPMTISEmuState;
79
80 #endif /* TPM_TPM_TIS_H */
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