1 /*-
2 * Copyright 1998 Massachusetts Institute of Technology
3 * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>.
4 * Copyright 2006 by Marius Strobl <marius@FreeBSD.org>.
5 * All rights reserved.
6 *
7 * Permission to use, copy, modify, and distribute this software and
8 * its documentation for any purpose and without fee is hereby
9 * granted, provided that both the above copyright notice and this
10 * permission notice appear in all copies, that both the above
11 * copyright notice and this permission notice appear in all
12 * supporting documentation, and that the name of M.I.T. not be used
13 * in advertising or publicity pertaining to distribution of the
14 * software without specific, written prior permission. M.I.T. makes
15 * no representations about the suitability of this software for any
16 * purpose. It is provided "as is" without express or implied
17 * warranty.
18 *
19 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
20 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
23 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
29 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09
33 */
34
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include <sys/endian.h>
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/bus.h>
42 #include <sys/kdb.h>
43 #include <sys/kernel.h>
44 #include <sys/malloc.h>
45 #include <sys/module.h>
46 #include <sys/pcpu.h>
47 #include <sys/rman.h>
48 #include <sys/smp.h>
49
50 #include <vm/vm.h>
51 #include <vm/pmap.h>
52
53 #include <dev/ofw/ofw_bus.h>
54 #include <dev/ofw/ofw_bus_subr.h>
55 #include <dev/ofw/openfirm.h>
56
57 #include <machine/bus.h>
58 #include <machine/intr_machdep.h>
59 #include <machine/resource.h>
60
61 /*
62 * The nexus handles root-level resource allocation requests and interrupt
63 * mapping. All direct subdevices of nexus are attached by DEVICE_IDENTIFY().
64 */
65
66 static device_probe_t nexus_probe;
67 static device_attach_t nexus_attach;
68 static bus_setup_intr_t nexus_setup_intr;
69 static bus_teardown_intr_t nexus_teardown_intr;
70 static bus_activate_resource_t nexus_activate_resource;
71 static bus_deactivate_resource_t nexus_deactivate_resource;
72 static int nexus_map_resource(device_t bus, device_t child, int type,
73 struct resource *r,
74 struct resource_map_request *argsp,
75 struct resource_map *map);
76 static int nexus_unmap_resource(device_t bus, device_t child, int type,
77 struct resource *r, struct resource_map *map);
78
79 static bus_space_tag_t nexus_get_bus_tag(device_t, device_t);
80 static int nexus_get_cpus(device_t, device_t, enum cpu_sets, size_t,
81 cpuset_t *);
82 #ifdef SMP
83 static bus_bind_intr_t nexus_bind_intr;
84 #endif
85 static bus_config_intr_t nexus_config_intr;
86 static ofw_bus_map_intr_t nexus_ofw_map_intr;
87
88 static device_method_t nexus_methods[] = {
89 /* Device interface */
90 DEVMETHOD(device_probe, nexus_probe),
91 DEVMETHOD(device_attach, nexus_attach),
92
93 /* Bus interface */
94 DEVMETHOD(bus_add_child, bus_generic_add_child),
95 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
96 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
97 DEVMETHOD(bus_map_resource, nexus_map_resource),
98 DEVMETHOD(bus_unmap_resource, nexus_unmap_resource),
99 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
100 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
101 #ifdef SMP
102 DEVMETHOD(bus_bind_intr, nexus_bind_intr),
103 #endif
104 DEVMETHOD(bus_config_intr, nexus_config_intr),
105 DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag),
106 DEVMETHOD(bus_get_cpus, nexus_get_cpus),
107
108 /* ofw_bus interface */
109 DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr),
110
111 DEVMETHOD_END
112 };
113
114 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1);
115 EARLY_DRIVER_MODULE(nexus, root, nexus_driver, 0, 0, BUS_PASS_BUS);
116 MODULE_VERSION(nexus, 1);
117
118 static int
119 nexus_probe(device_t dev)
120 {
121
122 device_quiet(dev); /* suppress attach message for neatness */
123
124 return (BUS_PROBE_DEFAULT);
125 }
126
127 static int
128 nexus_attach(device_t dev)
129 {
130
131 bus_generic_probe(dev);
132 bus_generic_attach(dev);
133
134 return (0);
135 }
136
137 static int
138 nexus_setup_intr(device_t bus __unused, device_t child, struct resource *r,
139 int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg,
140 void **cookiep)
141 {
142 int error, domain;
143
144 if (r == NULL)
145 panic("%s: NULL interrupt resource!", __func__);
146
147 if (cookiep != NULL)
148 *cookiep = NULL;
149 if ((rman_get_flags(r) & RF_SHAREABLE) == 0)
150 flags |= INTR_EXCL;
151
152 /* We depend here on rman_activate_resource() being idempotent. */
153 error = rman_activate_resource(r);
154 if (error)
155 return (error);
156
157 if (bus_get_domain(child, &domain) != 0) {
158 if(bootverbose)
159 device_printf(child, "no domain found\n");
160 domain = 0;
161 }
162 error = powerpc_setup_intr(device_get_nameunit(child),
163 rman_get_start(r), filt, intr, arg, flags, cookiep, domain);
164
165 return (error);
166 }
167
168 static int
169 nexus_teardown_intr(device_t bus __unused, device_t child __unused,
170 struct resource *r, void *ih)
171 {
172
173 if (r == NULL)
174 return (EINVAL);
175
176 return (powerpc_teardown_intr(ih));
177 }
178
179 static bus_space_tag_t
180 nexus_get_bus_tag(device_t bus __unused, device_t child __unused)
181 {
182
183 #if BYTE_ORDER == LITTLE_ENDIAN
184 return(&bs_le_tag);
185 #else
186 return(&bs_be_tag);
187 #endif
188 }
189
190 static int
191 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize,
192 cpuset_t *cpuset)
193 {
194
195 switch (op) {
196 #ifdef SMP
197 case INTR_CPUS:
198 if (setsize != sizeof(cpuset_t))
199 return (EINVAL);
200 *cpuset = all_cpus;
201 return (0);
202 #endif
203 default:
204 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset));
205 }
206 }
207
208 #ifdef SMP
209 static int
210 nexus_bind_intr(device_t bus __unused, device_t child __unused,
211 struct resource *r, int cpu)
212 {
213
214 return (powerpc_bind_intr(rman_get_start(r), cpu));
215 }
216 #endif
217
218 static int
219 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
220 enum intr_polarity pol)
221 {
222
223 return (powerpc_config_intr(irq, trig, pol));
224 }
225
226 static int
227 nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells,
228 pcell_t *irq)
229 {
230 u_int intr = MAP_IRQ(iparent, irq[0]);
231 if (icells > 1)
232 powerpc_fw_config_intr(intr, irq[1]);
233 return (intr);
234 }
235
236 static int
237 nexus_activate_resource(device_t bus __unused, device_t child __unused,
238 int type, int rid __unused, struct resource *r)
239 {
240
241 if (type == SYS_RES_MEMORY) {
242 vm_paddr_t start;
243 void *p;
244
245 start = (vm_paddr_t) rman_get_start(r);
246 if (bootverbose)
247 printf("nexus mapdev: start %jx, len %jd\n",
248 (uintmax_t)start, rman_get_size(r));
249
250 p = pmap_mapdev(start, (vm_size_t) rman_get_size(r));
251 if (p == NULL)
252 return (ENOMEM);
253 rman_set_virtual(r, p);
254 rman_set_bustag(r, &bs_be_tag);
255 rman_set_bushandle(r, (u_long)p);
256 }
257 return (rman_activate_resource(r));
258 }
259
260 static int
261 nexus_deactivate_resource(device_t bus __unused, device_t child __unused,
262 int type __unused, int rid __unused, struct resource *r)
263 {
264
265 /*
266 * If this is a memory resource, unmap it.
267 */
268 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
269 bus_size_t psize;
270
271 psize = rman_get_size(r);
272 pmap_unmapdev(rman_get_virtual(r), psize);
273 }
274
275 return (rman_deactivate_resource(r));
276 }
277
278
279 static int
280 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r,
281 struct resource_map_request *argsp, struct resource_map *map)
282 {
283
284 struct resource_map_request args;
285 rman_res_t end, length, start;
286
287 /* Resources must be active to be mapped. */
288 if (!(rman_get_flags(r) & RF_ACTIVE))
289 return (ENXIO);
290
291 /* Mappings are only supported on I/O and memory resources. */
292 switch (type) {
293 case SYS_RES_IOPORT:
294 case SYS_RES_MEMORY:
295 break;
296 default:
297 return (EINVAL);
298 }
299
300 resource_init_map_request(&args);
301 if (argsp != NULL)
302 bcopy(argsp, &args, imin(argsp->size, args.size));
303
304 start = rman_get_start(r) + args.offset;
305 if (args.length == 0)
306 length = rman_get_size(r);
307 else
308 length = args.length;
309
310 end = start + length - 1;
311 if (start > rman_get_end(r) || start < rman_get_start(r))
312 return (EINVAL);
313
314 if (end > rman_get_end(r) || end < start)
315 return (EINVAL);
316
317 /*
318 * If this is a memory resource, map it into the kernel.
319 */
320 switch (type) {
321 case SYS_RES_IOPORT:
322 panic("%s:%d SYS_RES_IOPORT handling not implemented", __func__, __LINE__);
323 /* XXX: untested
324 map->r_bushandle = start;
325 map->r_bustag = nexus_get_bus_tag(NULL, NULL);
326 map->r_size = length;
327 map->r_vaddr = NULL;
328 */
329 break;
330 case SYS_RES_MEMORY:
331 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr);
332 map->r_bustag = nexus_get_bus_tag(NULL, NULL);
333 map->r_size = length;
334 map->r_bushandle = (bus_space_handle_t)map->r_vaddr;
335 break;
336 }
337
338 return (0);
339
340 }
341
342 static int
343 nexus_unmap_resource(device_t bus, device_t child, int type, struct resource *r,
344 struct resource_map *map)
345 {
346
347 /*
348 * If this is a memory resource, unmap it.
349 */
350 switch (type) {
351 case SYS_RES_MEMORY:
352 pmap_unmapdev(map->r_vaddr, map->r_size);
353 /* FALLTHROUGH */
354 case SYS_RES_IOPORT:
355 break;
356 default:
357 return (EINVAL);
358 }
359
360 return (0);
361
362 }
Cache object: a2a78b39c3abd558836b8d6c7e4ed867
|