hw/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/isa.h"
  21 #include "hw/acpi/tpm.h"
  22 #include "qemu-common.h"
  23
  24 #define TPM_TIS_NUM_LOCALITIES      5     /* per spec */
  25 #define TPM_TIS_LOCALITY_SHIFT      12
  26 #define TPM_TIS_NO_LOCALITY         0xff
  27
  28 #define TPM_TIS_IS_VALID_LOCTY(x)   ((x) < TPM_TIS_NUM_LOCALITIES)
  29
  30 #define TPM_TIS_BUFFER_MAX          4096
  31
  32 typedef enum {
  33     TPM_TIS_STATE_IDLE = 0,
  34     TPM_TIS_STATE_READY,
  35     TPM_TIS_STATE_COMPLETION,
  36     TPM_TIS_STATE_EXECUTION,
  37     TPM_TIS_STATE_RECEPTION,
  38 } TPMTISState;
  39
  40 /* locality data  -- all fields are persisted */
  41 typedef struct TPMLocality {
  42     TPMTISState state;
  43     uint8_t access;
  44     uint8_t sts;
  45     uint32_t inte;
  46     uint32_t ints;
  47
  48     uint16_t w_offset;
  49     uint16_t r_offset;
  50     TPMSizedBuffer w_buffer;
  51     TPMSizedBuffer r_buffer;
  52 } TPMLocality;
  53
  54 typedef struct TPMTISEmuState {
  55     QEMUBH *bh;
  56     uint32_t offset;
  57     uint8_t buf[TPM_TIS_BUFFER_MAX];
  58
  59     uint8_t active_locty;
  60     uint8_t aborting_locty;
  61     uint8_t next_locty;
  62
  63     TPMLocality loc[TPM_TIS_NUM_LOCALITIES];
  64
  65     qemu_irq irq;
  66     uint32_t irq_num;
  67 } TPMTISEmuState;
  68
  69 #endif /* TPM_TPM_TIS_H */