The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/xen/interface/io/tpmif.h

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    1 /******************************************************************************
    2  * tpmif.h
    3  *
    4  * TPM I/O interface for Xen guest OSes.
    5  *
    6  * Permission is hereby granted, free of charge, to any person obtaining a copy
    7  * of this software and associated documentation files (the "Software"), to
    8  * deal in the Software without restriction, including without limitation the
    9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   10  * sell copies of the Software, and to permit persons to whom the Software is
   11  * furnished to do so, subject to the following conditions:
   12  *
   13  * The above copyright notice and this permission notice shall be included in
   14  * all copies or substantial portions of the Software.
   15  *
   16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   22  * DEALINGS IN THE SOFTWARE.
   23  *
   24  * Copyright (c) 2005, IBM Corporation
   25  *
   26  * Author: Stefan Berger, stefanb@us.ibm.com
   27  * Grant table support: Mahadevan Gomathisankaran
   28  *
   29  * This code has been derived from tools/libxc/xen/io/netif.h
   30  *
   31  * Copyright (c) 2003-2004, Keir Fraser
   32  */
   33 
   34 #ifndef __XEN_PUBLIC_IO_TPMIF_H__
   35 #define __XEN_PUBLIC_IO_TPMIF_H__
   36 
   37 #include "../grant_table.h"
   38 
   39 struct tpmif_tx_request {
   40     unsigned long addr;   /* Machine address of packet.   */
   41     grant_ref_t ref;      /* grant table access reference */
   42     uint16_t unused;
   43     uint16_t size;        /* Packet size in bytes.        */
   44 };
   45 typedef struct tpmif_tx_request tpmif_tx_request_t;
   46 
   47 /*
   48  * The TPMIF_TX_RING_SIZE defines the number of pages the
   49  * front-end and backend can exchange (= size of array).
   50  */
   51 typedef uint32_t TPMIF_RING_IDX;
   52 
   53 #define TPMIF_TX_RING_SIZE 1
   54 
   55 /* This structure must fit in a memory page. */
   56 
   57 struct tpmif_ring {
   58     struct tpmif_tx_request req;
   59 };
   60 typedef struct tpmif_ring tpmif_ring_t;
   61 
   62 struct tpmif_tx_interface {
   63     struct tpmif_ring ring[TPMIF_TX_RING_SIZE];
   64 };
   65 typedef struct tpmif_tx_interface tpmif_tx_interface_t;
   66 
   67 #endif
   68 
   69 /*
   70  * Local variables:
   71  * mode: C
   72  * c-set-style: "BSD"
   73  * c-basic-offset: 4
   74  * tab-width: 4
   75  * indent-tabs-mode: nil
   76  * End:
   77  */

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