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/riscv/htif/htif.h

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    1 /*-
    2  * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
    3  * All rights reserved.
    4  *
    5  * Portions of this software were developed by SRI International and the
    6  * University of Cambridge Computer Laboratory under DARPA/AFRL contract
    7  * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
    8  *
    9  * Portions of this software were developed by the University of Cambridge
   10  * Computer Laboratory as part of the CTSRD Project, with support from the
   11  * UK Higher Education Innovation Fund (HEIF).
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  * 1. Redistributions of source code must retain the above copyright
   17  *    notice, this list of conditions and the following disclaimer.
   18  * 2. Redistributions in binary form must reproduce the above copyright
   19  *    notice, this list of conditions and the following disclaimer in the
   20  *    documentation and/or other materials provided with the distribution.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  * $FreeBSD: releng/11.0/sys/riscv/htif/htif.h 295041 2016-01-29 15:12:31Z br $
   35  */
   36 
   37 #define HTIF_DEV_ID_SHIFT       (56)
   38 #define HTIF_DEV_ID_MASK        (0xfful << HTIF_DEV_ID_SHIFT)
   39 #define HTIF_CMD_SHIFT          (48)
   40 #define HTIF_CMD_MASK           (0xfful << HTIF_CMD_SHIFT)
   41 #define HTIF_DATA_SHIFT         (0)
   42 #define HTIF_DATA_MASK          (0xffffffff << HTIF_DATA_SHIFT)
   43 
   44 #define HTIF_CMD_READ                   (0x00ul)
   45 #define HTIF_CMD_WRITE                  (0x01ul)
   46 #define HTIF_CMD_READ_CONTROL_REG       (0x02ul)
   47 #define HTIF_CMD_WRITE_CONTROL_REG      (0x03ul)
   48 #define HTIF_CMD_IDENTIFY               (0xfful)
   49 #define  IDENTIFY_PADDR_SHIFT           8
   50 #define  IDENTIFY_IDENT                 0xff
   51 
   52 #define HTIF_NDEV               (256)
   53 #define HTIF_ID_LEN             (64)
   54 #define HTIF_ALIGN              (64)
   55 
   56 #define HTIF_DEV_CMD(entry)     ((entry & HTIF_CMD_MASK) >> HTIF_CMD_SHIFT)
   57 #define HTIF_DEV_ID(entry)      ((entry & HTIF_DEV_ID_MASK) >> HTIF_DEV_ID_SHIFT)
   58 #define HTIF_DEV_DATA(entry)    ((entry & HTIF_DATA_MASK) >> HTIF_DATA_SHIFT)
   59 
   60 /* bus softc */
   61 struct htif_softc {
   62         struct resource         *res[1];
   63         void                    *ihl[1];
   64         device_t                dev;
   65         uint64_t                identify_id;
   66         uint64_t                identify_done;
   67 };
   68 
   69 /* device private data */
   70 struct htif_dev_ivars {
   71         char                    *id;
   72         int                     index;
   73         device_t                dev;
   74         struct htif_softc       *sc;
   75 };
   76 
   77 uint64_t htif_command(uint64_t);
   78 int htif_setup_intr(int id, void *func, void *arg);
   79 int htif_read_ivar(device_t dev, device_t child, int which, uintptr_t *result);
   80 
   81 enum htif_device_ivars {
   82         HTIF_IVAR_INDEX,
   83         HTIF_IVAR_ID,
   84 };
   85 
   86 /*
   87  * Simplified accessors for HTIF devices
   88  */
   89 #define HTIF_ACCESSOR(var, ivar, type)  \
   90         __BUS_ACCESSOR(htif, var, HTIF, ivar, type)
   91 
   92 HTIF_ACCESSOR(index, INDEX, int);
   93 HTIF_ACCESSOR(id, ID, char *);

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