1 /*-
2 * Copyright (c) 2007 Bruce M. Simpson.
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 /*
28 * Driver to swallow up memory ranges reserved by CFE platform firmware.
29 * CFE on Sentry5 doesn't specify reserved ranges, so this is not useful
30 * at the present time.
31 * TODO: Don't attach this off nexus.
32 */
33
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: releng/9.0/sys/dev/cfe/cfe_resource.c 183370 2008-09-26 03:53:10Z imp $");
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/socket.h>
41
42 #include <sys/module.h>
43 #include <sys/bus.h>
44
45 #include <machine/bus.h>
46 #include <machine/resource.h>
47 #include <sys/rman.h>
48
49 #include <dev/cfe/cfe_api.h>
50 #include <dev/cfe/cfe_error.h>
51
52 #define MAX_CFE_RESERVATIONS 16
53
54 struct cferes_softc {
55 int rnum;
56 int rid[MAX_CFE_RESERVATIONS];
57 struct resource *res[MAX_CFE_RESERVATIONS];
58 };
59
60 static int
61 cferes_probe(device_t dev)
62 {
63
64 return (0);
65 }
66
67 static int
68 cferes_attach(device_t dev)
69 {
70
71 return (0);
72 }
73
74 static void
75 cferes_identify(driver_t* driver, device_t parent)
76 {
77 device_t child;
78 int i;
79 struct resource *res;
80 int result;
81 int rid;
82 struct cferes_softc *sc;
83 uint64_t addr, len, type;
84
85 child = BUS_ADD_CHILD(parent, 100, "cferes", -1);
86 device_set_driver(child, driver);
87 sc = device_get_softc(child);
88
89 sc->rnum = 0;
90 for (i = 0; i < ~0U; i++) {
91 result = cfe_enummem(i, CFE_FLG_FULL_ARENA, &addr, &len, &type);
92 if (result < 0)
93 break;
94 if (type != CFE_MI_RESERVED) {
95 if (bootverbose)
96 printf("%s: skipping non reserved range 0x%0jx(%jd)\n",
97 device_getnameunit(child),
98 (uintmax_t)addr, (uintmax_t)len);
99 continue;
100 }
101
102 bus_set_resource(child, SYS_RES_MEMORY, sc->rnum, addr, len);
103 rid = sc->rnum;
104 res = bus_alloc_resource_any(child, SYS_RES_MEMORY, &rid, 0);
105 if (res == NULL) {
106 bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum);
107 continue;
108 }
109 sc->rid[sc->rnum] = rid;
110 sc->res[sc->rnum] = res;
111
112 sc->rnum++;
113 if (sc->rnum == MAX_CFE_RESERVATIONS)
114 break;
115 }
116
117 if (sc->rnum == 0) {
118 device_delete_child(parent, child);
119 return;
120 }
121
122 device_set_desc(child, "CFE reserved memory");
123 }
124
125 static int
126 cferes_detach(device_t dev)
127 {
128 int i;
129 struct cferes_softc *sc = device_get_softc(dev);
130
131 for (i = 0; i < sc->rnum; i++) {
132 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid[i],
133 sc->res[i]);
134 }
135
136 return (0);
137 }
138
139 static device_method_t cferes_methods[] = {
140 /* Device interface */
141 DEVMETHOD(device_identify, cferes_identify),
142 DEVMETHOD(device_probe, cferes_probe),
143 DEVMETHOD(device_attach, cferes_attach),
144 DEVMETHOD(device_detach, cferes_detach),
145 DEVMETHOD(device_shutdown, bus_generic_shutdown),
146 DEVMETHOD(device_suspend, bus_generic_suspend),
147 DEVMETHOD(device_resume, bus_generic_resume),
148 { 0, 0 }
149 };
150
151 static driver_t cferes_driver = {
152 "cferes",
153 cferes_methods,
154 sizeof (struct cferes_softc)
155 };
156
157 static devclass_t cferes_devclass;
158
159 DRIVER_MODULE(cfe, nexus, cferes_driver, cferes_devclass, 0, 0);
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