hw/tpm/tpm_ppi.h

   1 /*
   2  * TPM Physical Presence Interface
   3  *
   4  * Copyright (C) 2018 IBM Corporation
   5  *
   6  * Authors:
   7  *  Stefan Berger    <stefanb@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12 #ifndef TPM_TPM_PPI_H
  13 #define TPM_TPM_PPI_H
  14
  15 #include "exec/address-spaces.h"
  16
  17 typedef struct TPMPPI {
  18     MemoryRegion ram;
  19     uint8_t *buf;
  20 } TPMPPI;
  21
  22 /**
  23  * tpm_ppi_init:
  24  * @tpmppi: a TPMPPI
  25  * @m: the address-space / MemoryRegion to use
  26  * @addr: the address of the PPI region
  27  * @obj: the owner object
  28  *
  29  * Register the TPM PPI memory region at @addr on the given address
  30  * space for the object @obj.
  31  **/
  32 void tpm_ppi_init(TPMPPI *tpmppi, struct MemoryRegion *m,
  33                   hwaddr addr, Object *obj);
  34
  35 /**
  36  * tpm_ppi_reset:
  37  * @tpmppi: a TPMPPI
  38  *
  39  * Function to call on machine reset. It will check if the "Memory
  40  * overwrite" variable is set, and perform a memory clear on volatile
  41  * memory if requested.
  42  **/
  43 void tpm_ppi_reset(TPMPPI *tpmppi);
  44
  45 #endif /* TPM_TPM_PPI_H */