xref: /freebsd/sys/riscv/riscv/ofw_machdep.c (revision fdafd315ad0d0f28a11b9fb4476a9ab059c62b92)
1*63270b0bSRuslan Bukin /*-
2*63270b0bSRuslan Bukin  * Copyright (c) 2015 Ian Lepore <ian@freebsd.org>
3*63270b0bSRuslan Bukin  * All rights reserved.
4*63270b0bSRuslan Bukin  *
5*63270b0bSRuslan Bukin  * Redistribution and use in source and binary forms, with or without
6*63270b0bSRuslan Bukin  * modification, are permitted provided that the following conditions
7*63270b0bSRuslan Bukin  * are met:
8*63270b0bSRuslan Bukin  * 1. Redistributions of source code must retain the above copyright
9*63270b0bSRuslan Bukin  *    notice, this list of conditions and the following disclaimer.
10*63270b0bSRuslan Bukin  * 2. Redistributions in binary form must reproduce the above copyright
11*63270b0bSRuslan Bukin  *    notice, this list of conditions and the following disclaimer in the
12*63270b0bSRuslan Bukin  *    documentation and/or other materials provided with the distribution.
13*63270b0bSRuslan Bukin  *
14*63270b0bSRuslan Bukin  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15*63270b0bSRuslan Bukin  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16*63270b0bSRuslan Bukin  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17*63270b0bSRuslan Bukin  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18*63270b0bSRuslan Bukin  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19*63270b0bSRuslan Bukin  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20*63270b0bSRuslan Bukin  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21*63270b0bSRuslan Bukin  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22*63270b0bSRuslan Bukin  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23*63270b0bSRuslan Bukin  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24*63270b0bSRuslan Bukin  * SUCH DAMAGE.
25*63270b0bSRuslan Bukin  */
26*63270b0bSRuslan Bukin 
27*63270b0bSRuslan Bukin #include <sys/param.h>
28*63270b0bSRuslan Bukin #include <sys/bus.h>
29*63270b0bSRuslan Bukin 
30*63270b0bSRuslan Bukin #include <machine/bus.h>
31*63270b0bSRuslan Bukin 
32*63270b0bSRuslan Bukin #include <dev/ofw/openfirm.h>
33*63270b0bSRuslan Bukin #include <dev/ofw/ofw_subr.h>
34*63270b0bSRuslan Bukin 
35*63270b0bSRuslan Bukin extern struct bus_space memmap_bus;
36*63270b0bSRuslan Bukin 
37*63270b0bSRuslan Bukin int
OF_decode_addr(phandle_t dev,int regno,bus_space_tag_t * tag,bus_space_handle_t * handle,bus_size_t * sz)38*63270b0bSRuslan Bukin OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
39*63270b0bSRuslan Bukin     bus_space_handle_t *handle, bus_size_t *sz)
40*63270b0bSRuslan Bukin {
41*63270b0bSRuslan Bukin 	bus_addr_t addr;
42*63270b0bSRuslan Bukin 	bus_size_t size;
43*63270b0bSRuslan Bukin 	int err;
44*63270b0bSRuslan Bukin 
45*63270b0bSRuslan Bukin 	err = ofw_reg_to_paddr(dev, regno, &addr, &size, NULL);
46*63270b0bSRuslan Bukin 	if (err != 0)
47*63270b0bSRuslan Bukin 		return (err);
48*63270b0bSRuslan Bukin 
49*63270b0bSRuslan Bukin 	*tag = &memmap_bus;
50*63270b0bSRuslan Bukin 
51*63270b0bSRuslan Bukin 	if (sz != NULL)
52*63270b0bSRuslan Bukin 		*sz = size;
53*63270b0bSRuslan Bukin 
54*63270b0bSRuslan Bukin 	return (bus_space_map(*tag, addr, size, 0, handle));
55*63270b0bSRuslan Bukin }
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