FreeBSD/Linux Kernel Cross Reference
sys/dev/bktr/bktr_mem.h

     /* $FreeBSD$ */
     
     /*
      * This is prt of the Driver for Video Capture Cards (Frame grabbers)
      * and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879
      * chipset.
      * Copyright Roger Hardiman.
      *
      * bktr_mem : This kernel module allows us to keep our allocated
     *            contiguous memory for the video buffer, DMA programs and VBI data
     *            while the main bktr driver is unloaded and reloaded.
     *            This avoids the problem of trying to allocate contiguous each
     *            time the bktr driver is loaded.
     */
    
    /*-
     * 1. Redistributions of source code must retain the
     * Copyright (c) 2000 Roger Hardiman
     * All rights reserved.
     *
     * 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.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Roger Hardiman
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     * INDIRECT, INCIDENTAL, 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 DAMAGE.
     */
    
    
    /* Support this number of devices */
    #define BKTR_MEM_MAX_DEVICES    8
    
    /* Define a name for each block of memory we need to keep hold of */
    #define BKTR_MEM_DMA_PROG       1
    #define BKTR_MEM_ODD_DMA_PROG   2
    #define BKTR_MEM_VBIDATA        3
    #define BKTR_MEM_VBIBUFFER      4
    #define BKTR_MEM_BUF            5
    
    /* Prototypes */
    int         bktr_has_stored_addresses(int unit);
    void        bktr_store_address(int unit, int type, vm_offset_t addr);
    vm_offset_t bktr_retrieve_address(int unit, int type);
    

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