FreeBSD/Linux Kernel Cross Reference
sys/dev/bhnd/bhnd_eromvar.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2017 The FreeBSD Foundation
      *
      * This software was developed by Landon Fuller under sponsorship from
      * the FreeBSD Foundation.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer,
     *    without modification.
     * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
     *    redistribution must be conditioned upon including a substantially
     *    similar Disclaimer requirement for further binary redistribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
     * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
     * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
     * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
     * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     * THE POSSIBILITY OF SUCH DAMAGES.
     * 
     * $FreeBSD$
     */
    
    #ifndef _BHND_EROM_BHND_EROMVAR_H_
    #define _BHND_EROM_BHND_EROMVAR_H_
    
    #include <sys/param.h>
    
    #include "bhnd_erom.h"
    
    /* forward declarations */
    struct bhnd_erom_io;
    struct bhnd_erom_iobus;
    
    /** @see bhnd_erom_io_map() */
    typedef int             (bhnd_erom_io_map_t)(struct bhnd_erom_io *eio,
                                 bhnd_addr_t addr, bhnd_size_t size);
    
    /** @see bhnd_erom_io_tell() */
    typedef int             (bhnd_erom_io_tell_t)(struct bhnd_erom_io *eio,
                                 bhnd_addr_t *addr, bhnd_size_t *size);
    
    /** @see bhnd_erom_io_read() */
    typedef uint32_t        (bhnd_erom_io_read_t)(struct bhnd_erom_io *eio,
                                 bhnd_size_t offset, u_int width);
    
    /** @see bhnd_erom_io_fini() */
    typedef void            (bhnd_erom_io_fini_t)(struct bhnd_erom_io *eio);
    
    int                      bhnd_erom_read_chipid(struct bhnd_erom_io *eio,
                                 struct bhnd_chipid *cid);
    
    /**
     * Abstract EROM bus I/O support.
     */
    struct bhnd_erom_io {
            bhnd_erom_io_map_t      *map;   /**< @see bhnd_erom_io_map() */
            bhnd_erom_io_tell_t     *tell;  /**< @see bhnd_erom_io_tell() */
            bhnd_erom_io_read_t     *read;  /**< @see bhnd_erom_io_read() */
            bhnd_erom_io_fini_t     *fini;  /**< @see bhnd_erom_io_fini(). May be NULL */
    };
    
    /**
     * EROM bus handle/tag I/O instance state.
     */
    struct bhnd_erom_iobus {
            struct bhnd_erom_io     eio;
            bhnd_addr_t             addr;   /**< the address of @p bsh */
            bhnd_size_t             size;   /**< the size of @p bsh */
            bus_space_tag_t         bst;    /**< bus space tag */
            bus_space_handle_t      bsh;    /**< bus space handle mapping the full enumeration space */
            bool                    mapped; /**< if a mapping is active */
            bus_size_t              offset; /**< the current mapped offset within bsh */
            bus_size_t              limit;  /**< the current mapped size relative to offset */
    };
    
    #endif /* _BHND_EROM_BHND_EROMVAR_H_ */

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