/* $NetBSD: bus_space.c,v 1.5 2008/04/28 20:23:31 martin Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ /* * Implementation of bus_space mapping for the DECstation. */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: bus_space.c,v 1.5 2008/04/28 20:23:31 martin Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <machine/bus.h> /* ARGSUSED */ int bus_space_map(t, bpa, size, flags, bshp) bus_space_tag_t t; bus_addr_t bpa; bus_size_t size; int flags; bus_space_handle_t *bshp; { int cacheable = flags & BUS_SPACE_MAP_CACHEABLE; /* Mappings on the DECstation are always linear. */ if (cacheable) *bshp = MIPS_PHYS_TO_KSEG0(bpa); else *bshp = MIPS_PHYS_TO_KSEG1(bpa); return (0); } /* ARGSUSED */ int bus_space_alloc(t, rstart, rend, size, alignment, boundary, flags, bpap, bshp) bus_space_tag_t t; bus_addr_t rstart, rend; bus_size_t size, alignment, boundary; int flags; bus_addr_t *bpap; bus_space_handle_t *bshp; { /* * Not meaningful on any currently-supported DECstation bus. */ return (EINVAL); } /* ARGSUSED */ void bus_space_free(t, bsh, size) bus_space_tag_t t; bus_space_handle_t bsh; bus_size_t size; { /* * Not meaningful on any currently-supported DECstation bus. */ panic("bus_space_free: shouldn't be here"); } void bus_space_unmap(t, bsh, size) bus_space_tag_t t; bus_space_handle_t bsh; bus_size_t size; { /* Nothing to do. */ } /* ARGSUSED */ int bus_space_subregion(t, bsh, offset, size, nbshp) bus_space_tag_t t; bus_space_handle_t bsh; bus_size_t offset, size; bus_space_handle_t *nbshp; { *nbshp = bsh + offset; return (0); }