freebsd-dev/sys/dev/bktr/bktr_mem.h

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/* $FreeBSD$ */
/*
* 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);