ofw_machdep.c revision 133728 
1/*-
2 * Copyright (c) 2001 by Thomas Moestl <tmm@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 ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
21 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
22 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
23 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * $FreeBSD: head/sys/sparc64/sparc64/ofw_machdep.c 133728 2004-08-14 21:43:37Z marius $
26 */
27
28/*
29 * Some OpenFirmware helper functions that are likely machine dependent.
30 */
31
32#include <sys/param.h>
33#include <sys/bus.h>
34#include <sys/systm.h>
35
36#include <net/ethernet.h>
37
38#include <dev/ofw/ofw_bus.h>
39#include <dev/ofw/openfirm.h>
40
41#include <machine/bus.h>
42#include <machine/idprom.h>
43#include <machine/ofw_machdep.h>
44#include <machine/ofw_upa.h>
45#include <machine/resource.h>
46
47#include <sparc64/pci/ofw_pci.h>
48#include <sparc64/isa/ofw_isa.h>
49#include <sparc64/sbus/ofw_sbus.h>
50
51void
52OF_getetheraddr(device_t dev, u_char *addr)
53{
54	char buf[sizeof("true")];
55	phandle_t node;
56	struct idprom idp;
57
58	if ((node = OF_finddevice("/options")) > 0 &&
59	    OF_getprop(node, "local-mac-address?", buf, sizeof(buf)) > 0) {
60		buf[sizeof(buf) - 1] = '\0';
61		if (strcmp(buf, "true") == 0 &&
62		    (node = ofw_bus_get_node(dev)) > 0 &&
63		    OF_getprop(node, "local-mac-address", addr,
64		    ETHER_ADDR_LEN) == ETHER_ADDR_LEN)
65			return;
66	}
67
68	node = OF_peer(0);
69	if (node <= 0 || OF_getprop(node, "idprom", &idp, sizeof(idp)) == -1)
70		panic("Could not determine the machine ethernet address");
71	bcopy(&idp.id_ether, addr, ETHER_ADDR_LEN);
72}
73
74int
75OF_decode_addr(phandle_t node, int *space, bus_addr_t *addr)
76{
77	char name[32];
78	union {
79		struct isa_ranges isa[4];
80		struct sbus_ranges sbus[8];
81		struct upa_ranges upa[4];
82	} range;
83	union {
84		struct isa_regs isa;
85		struct sbus_regs sbus;
86	} reg;
87	phandle_t bus, pbus;
88	u_long child, dummy, phys;
89	int cs, i, rsz, type;
90
91	bus = OF_parent(node);
92	if (bus == 0)
93		return (ENXIO);
94	if (OF_getprop(bus, "name", name, sizeof(name)) == -1)
95		return (ENXIO);
96	name[sizeof(name) - 1] = '\0';
97	if (strcmp(name, "ebus") == 0 || strcmp(name, "isa") == 0) {
98		if (OF_getprop(node, "reg", &reg.isa, sizeof(reg.isa)) == -1)
99			return (ENXIO);
100		rsz = OF_getprop(bus, "ranges", range.isa, sizeof(range.isa));
101		if (rsz == -1)
102			return (ENXIO);
103		phys = ISA_REG_PHYS(&reg.isa);
104		dummy = phys + 1;
105		type = ofw_isa_range_map(range.isa, rsz / sizeof(*range.isa),
106		    &phys, &dummy, NULL);
107		if (type == SYS_RES_MEMORY) {
108			cs = PCI_CS_MEM32;
109			*space = PCI_MEMORY_BUS_SPACE;
110		} else {
111			cs = PCI_CS_IO;
112			*space = PCI_IO_BUS_SPACE;
113		}
114
115		/* Find the topmost PCI node (the host bridge) */
116		while (1) {
117			pbus = OF_parent(bus);
118			if (pbus == 0)
119				return (ENXIO);
120			if (OF_getprop(pbus, "name", name, sizeof(name)) == -1)
121				return (ENXIO);
122			name[sizeof(name) - 1] = '\0';
123			if (strcmp(name, "pci") != 0)
124				break;
125			bus = pbus;
126		}
127
128		/* There wasn't a PCI bridge. */
129		if (bus == OF_parent(node))
130			return (ENXIO);
131
132		/* Make sure we reached the UPA/PCI node. */
133		if (OF_getprop(pbus, "device_type", name, sizeof(name)) == -1)
134			return (ENXIO);
135		name[sizeof(name) - 1] = '\0';
136		if (strcmp(name, "upa") != 0)
137			return (ENXIO);
138
139		rsz = OF_getprop(bus, "ranges", range.upa, sizeof(range.upa));
140		if (rsz == -1)
141			return (ENXIO);
142		for (i = 0; i < (rsz / sizeof(range.upa[0])); i++) {
143			child = UPA_RANGE_CHILD(&range.upa[i]);
144			if (UPA_RANGE_CS(&range.upa[i]) == cs &&
145			    phys >= child &&
146			    phys - child < UPA_RANGE_SIZE(&range.upa[i])) {
147				*addr = UPA_RANGE_PHYS(&range.upa[i]) + phys;
148				return (0);
149			}
150		}
151	} else if (strcmp(name, "sbus") == 0) {
152		if (OF_getprop(node, "reg", &reg.sbus, sizeof(reg.sbus)) == -1)
153			return (ENXIO);
154		rsz = OF_getprop(bus, "ranges", range.sbus,
155		    sizeof(range.sbus));
156		if (rsz == -1)
157			return (ENXIO);
158		for (i = 0; i < (rsz / sizeof(range.sbus[0])); i++) {
159			if (reg.sbus.sbr_slot != range.sbus[i].cspace)
160				continue;
161			if (reg.sbus.sbr_offset < range.sbus[i].coffset ||
162			    reg.sbus.sbr_offset >= range.sbus[i].coffset +
163			    range.sbus[i].size)
164				continue;
165			/* Found it... */
166			phys = range.sbus[i].poffset |
167			    ((bus_addr_t)range.sbus[i].pspace << 32);
168			phys += reg.sbus.sbr_offset - range.sbus[i].coffset;
169			*addr = phys;
170			*space = SBUS_BUS_SPACE;
171			return (0);
172		}
173	}
174	return (ENXIO);
175}
176