tpm/tpm_tis.h

   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 <stefanb@us.ibm.com>
   8  *  David Safford <safford@us.ibm.com>
   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 typedef struct TPMSizedBuffer {
  39     uint32_t size;
  40     uint8_t  *buffer;
  41 } TPMSizedBuffer;
  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 */