1 /*- 2 * Copyright (c) 2015 Ian Lepore <ian@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/param.h> 28 #include <sys/bus.h> 29 30 #include <machine/bus.h> 31 32 #include <dev/ofw/openfirm.h> 33 #include <dev/ofw/ofw_subr.h> 34 35 extern struct bus_space memmap_bus; 36 37 int 38 OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag, 39 bus_space_handle_t *handle, bus_size_t *sz) 40 { 41 bus_addr_t addr; 42 bus_size_t size; 43 phandle_t parent; 44 int err, flags; 45 46 err = ofw_reg_to_paddr(dev, regno, &addr, &size, NULL); 47 if (err != 0) 48 return (err); 49 50 *tag = &memmap_bus; 51 52 if (sz != NULL) 53 *sz = size; 54 55 flags = 0; 56 parent = OF_parent(dev); 57 if (parent > 0 && OF_hasprop(parent, "nonposted-mmio")) 58 flags |= BUS_SPACE_MAP_NONPOSTED; 59 60 return (bus_space_map(*tag, addr, size, flags, handle)); 61 } 62