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      1 /*	$NetBSD: octeon_dma.c,v 1.3 2019/12/15 16:48:26 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Platform-specific DMA support for the MIPS OCTEON.  Copied from MALTA code.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: octeon_dma.c,v 1.3 2019/12/15 16:48:26 tsutsui Exp $");
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 
     42 #include <mips/cpuregs.h>
     43 
     44 #define	_MIPS_BUS_DMA_PRIVATE
     45 #include <sys/bus.h>
     46 
     47 #include <mips/cavium/octeonvar.h>
     48 
     49 void
     50 octeon_dma_init(struct octeon_config *mcp)
     51 {
     52 	bus_dma_tag_t t;
     53 
     54 	/* XXX need 32bit tag? */
     55 	t = &mcp->mc_iobus_dmat;
     56 	t->_cookie = mcp;
     57 	t->_wbase = 0;
     58 	t->_bounce_alloc_lo = 0;
     59 	t->_bounce_alloc_hi = 0;
     60 	t->_dmamap_ops = mips_bus_dmamap_ops;
     61 	t->_dmamem_ops = mips_bus_dmamem_ops;
     62 	t->_dmatag_ops = mips_bus_dmatag_ops;
     63 
     64 	/* XXX struct copy */
     65 	mcp->mc_bootbus_dmat = mcp->mc_iobus_dmat;
     66 	mcp->mc_core1_dmat = mcp->mc_iobus_dmat;
     67 	mcp->mc_fpa_dmat = mcp->mc_iobus_dmat;
     68 
     69 #ifdef __mips_n32
     70 	mcp->mc_fpa_dmat._bounce_alloc_hi = round_page(MIPS_PHYS_MASK);
     71 #endif
     72 }
     73