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 #include <machine/fdt.h>
32
33 #include <dev/ofw/openfirm.h>
34 #include <dev/ofw/ofw_subr.h>
35
36 int
OF_decode_addr(phandle_t dev,int regno,bus_space_tag_t * tag,bus_space_handle_t * handle,bus_size_t * sz)37 OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
38 bus_space_handle_t *handle, bus_size_t *sz)
39 {
40 bus_addr_t addr;
41 bus_size_t size;
42 pcell_t pci_hi;
43 int flags, res;
44
45 res = ofw_reg_to_paddr(dev, regno, &addr, &size, &pci_hi);
46 if (res < 0)
47 return (res);
48
49 /*
50 * Nothing special to do for PCI buses right now.
51 * This may need to be handled per-platform when it does come up.
52 */
53 #ifdef notyet
54 if (pci_hi == OFW_PADDR_NOT_PCI) {
55 *tag = fdtbus_bs_tag;
56 flags = 0;
57 } else {
58 *tag = fdtbus_bs_tag;
59 flags = (pci_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) ?
60 BUS_SPACE_MAP_PREFETCHABLE: 0;
61 }
62 #else
63 *tag = fdtbus_bs_tag;
64 flags = 0;
65 #endif
66
67 if (sz != NULL)
68 *sz = size;
69
70 return (bus_space_map(*tag, addr, size, flags, handle));
71 }
72