1/*
2 * Copyright 2002 by Peter Grehan. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
| 1/*
2 * Copyright 2002 by Peter Grehan. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
|
27 * $FreeBSD: head/sys/powerpc/psim/iobus.c 103620 2002-09-19 04:57:10Z grehan $
| 27 * $FreeBSD: head/sys/powerpc/psim/iobus.c 109623 2003-01-21 08:56:16Z alfred $
|
28 */
29
30/*
31 * PSIM 'iobus' local bus. Should be set up in the device tree like:
32 *
33 * /iobus@0x80000000/name psim-iobus
34 *
35 * Code borrowed from various nexus.c and uninorth.c :-)
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
41#include <sys/malloc.h>
42#include <sys/bus.h>
43#include <machine/bus.h>
44#include <sys/rman.h>
45
46#include <dev/ofw/openfirm.h>
47
48#include <machine/vmparam.h>
49#include <vm/vm.h>
50#include <vm/pmap.h>
51#include <machine/pmap.h>
52
53#include <machine/resource.h>
54#include <machine/nexusvar.h>
55
56#include <powerpc/psim/iobusvar.h>
57
58static MALLOC_DEFINE(M_IOBUS, "iobus", "iobus device information");
59
60static int iobus_probe(device_t);
61static int iobus_attach(device_t);
62static int iobus_print_child(device_t dev, device_t child);
63static void iobus_probe_nomatch(device_t, device_t);
64static int iobus_read_ivar(device_t, device_t, int, uintptr_t *);
65static int iobus_write_ivar(device_t, device_t, int, uintptr_t);
66static struct resource *iobus_alloc_resource(device_t, device_t, int, int *,
67 u_long, u_long, u_long, u_int);
68static int iobus_activate_resource(device_t, device_t, int, int,
69 struct resource *);
70static int iobus_deactivate_resource(device_t, device_t, int, int,
71 struct resource *);
72static int iobus_release_resource(device_t, device_t, int, int,
73 struct resource *);
74
75/*
76 * Bus interface definition
77 */
78static device_method_t iobus_methods[] = {
79 /* Device interface */
80 DEVMETHOD(device_probe, iobus_probe),
81 DEVMETHOD(device_attach, iobus_attach),
82 DEVMETHOD(device_detach, bus_generic_detach),
83 DEVMETHOD(device_shutdown, bus_generic_shutdown),
84 DEVMETHOD(device_suspend, bus_generic_suspend),
85 DEVMETHOD(device_resume, bus_generic_resume),
86
87 /* Bus interface */
88 DEVMETHOD(bus_print_child, iobus_print_child),
89 DEVMETHOD(bus_probe_nomatch, iobus_probe_nomatch),
90 DEVMETHOD(bus_read_ivar, iobus_read_ivar),
91 DEVMETHOD(bus_write_ivar, iobus_write_ivar),
92 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
93 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
94
95 DEVMETHOD(bus_alloc_resource, iobus_alloc_resource),
96 DEVMETHOD(bus_release_resource, iobus_release_resource),
97 DEVMETHOD(bus_activate_resource, iobus_activate_resource),
98 DEVMETHOD(bus_deactivate_resource, iobus_deactivate_resource),
99
100 { 0, 0 }
101};
102
103static driver_t iobus_driver = {
104 "iobus",
105 iobus_methods,
106 sizeof(struct iobus_softc)
107};
108
109devclass_t iobus_devclass;
110
111DRIVER_MODULE(iobus, nexus, iobus_driver, iobus_devclass, 0, 0);
112
113static int
114iobus_probe(device_t dev)
115{
116 char *type = nexus_get_name(dev);
117
118 if (strcmp(type, "psim-iobus") != 0)
119 return (ENXIO);
120
121 device_set_desc(dev, "PSIM local bus");
122 return (0);
123}
124
125/*
126 * Add interrupt/addr range to the dev's resource list if present
127 */
128static void
129iobus_add_intr(phandle_t devnode, struct iobus_devinfo *dinfo)
130{
131 u_int intr = -1;
132
133 if (OF_getprop(devnode, "interrupt", &intr, sizeof(intr)) != -1) {
134 resource_list_add(&dinfo->id_resources,
135 SYS_RES_IRQ, 0, intr, intr, 1);
136 }
137 dinfo->id_interrupt = intr;
138}
139
140
141static void
142iobus_add_reg(phandle_t devnode, struct iobus_devinfo *dinfo,
143 vm_offset_t iobus_off)
144{
145 u_int size;
146 int i;
147
148 size = OF_getprop(devnode, "reg", dinfo->id_reg,sizeof(dinfo->id_reg));
149
150 if (size != -1) {
151 dinfo->id_nregs = size / (sizeof(dinfo->id_reg[0]));
152
153 for (i = 0; i < dinfo->id_nregs; i+= 3) {
154 /*
155 * Scale the absolute addresses back to iobus
156 * relative offsets. This is to better simulate
157 * macio
158 */
159 dinfo->id_reg[i+1] -= iobus_off;
160
161 resource_list_add(&dinfo->id_resources,
162 SYS_RES_MEMORY, 0,
163 dinfo->id_reg[i+1],
164 dinfo->id_reg[i+1] +
165 dinfo->id_reg[i+2],
166 dinfo->id_reg[i+2]);
167 }
168 }
169}
170
171
172static int
173iobus_attach(device_t dev)
174{
175 struct iobus_softc *sc;
176 struct iobus_devinfo *dinfo;
177 phandle_t root;
178 phandle_t child;
179 device_t cdev;
180 char *name;
181 u_int reg[2];
182 int size;
183
184 sc = device_get_softc(dev);
185 sc->sc_node = nexus_get_node(dev);
186
187 /*
188 * Find the base addr/size of the iobus, and initialize the
189 * resource manager
190 */
191 size = OF_getprop(sc->sc_node, "reg", reg, sizeof(reg));
192 if (size == sizeof(reg)) {
193 sc->sc_addr = reg[0];
194 sc->sc_size = reg[1];
195 } else {
196 return (ENXIO);
197 }
198
199 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
200 sc->sc_mem_rman.rm_descr = "IOBus Device Memory";
201 if (rman_init(&sc->sc_mem_rman) != 0) {
202 device_printf(dev,
203 "failed to init mem range resources\n");
204 return (ENXIO);
205 }
206 rman_manage_region(&sc->sc_mem_rman, 0, sc->sc_size);
207
208 /*
209 * Iterate through the sub-devices
210 */
211 root = sc->sc_node;
212
213 for (child = OF_child(root); child != 0; child = OF_peer(child)) {
214 OF_getprop_alloc(child, "name", 1, (void **)&name);
215
216 cdev = device_add_child(dev, NULL, -1);
217 if (cdev != NULL) {
| 28 */
29
30/*
31 * PSIM 'iobus' local bus. Should be set up in the device tree like:
32 *
33 * /iobus@0x80000000/name psim-iobus
34 *
35 * Code borrowed from various nexus.c and uninorth.c :-)
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
41#include <sys/malloc.h>
42#include <sys/bus.h>
43#include <machine/bus.h>
44#include <sys/rman.h>
45
46#include <dev/ofw/openfirm.h>
47
48#include <machine/vmparam.h>
49#include <vm/vm.h>
50#include <vm/pmap.h>
51#include <machine/pmap.h>
52
53#include <machine/resource.h>
54#include <machine/nexusvar.h>
55
56#include <powerpc/psim/iobusvar.h>
57
58static MALLOC_DEFINE(M_IOBUS, "iobus", "iobus device information");
59
60static int iobus_probe(device_t);
61static int iobus_attach(device_t);
62static int iobus_print_child(device_t dev, device_t child);
63static void iobus_probe_nomatch(device_t, device_t);
64static int iobus_read_ivar(device_t, device_t, int, uintptr_t *);
65static int iobus_write_ivar(device_t, device_t, int, uintptr_t);
66static struct resource *iobus_alloc_resource(device_t, device_t, int, int *,
67 u_long, u_long, u_long, u_int);
68static int iobus_activate_resource(device_t, device_t, int, int,
69 struct resource *);
70static int iobus_deactivate_resource(device_t, device_t, int, int,
71 struct resource *);
72static int iobus_release_resource(device_t, device_t, int, int,
73 struct resource *);
74
75/*
76 * Bus interface definition
77 */
78static device_method_t iobus_methods[] = {
79 /* Device interface */
80 DEVMETHOD(device_probe, iobus_probe),
81 DEVMETHOD(device_attach, iobus_attach),
82 DEVMETHOD(device_detach, bus_generic_detach),
83 DEVMETHOD(device_shutdown, bus_generic_shutdown),
84 DEVMETHOD(device_suspend, bus_generic_suspend),
85 DEVMETHOD(device_resume, bus_generic_resume),
86
87 /* Bus interface */
88 DEVMETHOD(bus_print_child, iobus_print_child),
89 DEVMETHOD(bus_probe_nomatch, iobus_probe_nomatch),
90 DEVMETHOD(bus_read_ivar, iobus_read_ivar),
91 DEVMETHOD(bus_write_ivar, iobus_write_ivar),
92 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
93 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
94
95 DEVMETHOD(bus_alloc_resource, iobus_alloc_resource),
96 DEVMETHOD(bus_release_resource, iobus_release_resource),
97 DEVMETHOD(bus_activate_resource, iobus_activate_resource),
98 DEVMETHOD(bus_deactivate_resource, iobus_deactivate_resource),
99
100 { 0, 0 }
101};
102
103static driver_t iobus_driver = {
104 "iobus",
105 iobus_methods,
106 sizeof(struct iobus_softc)
107};
108
109devclass_t iobus_devclass;
110
111DRIVER_MODULE(iobus, nexus, iobus_driver, iobus_devclass, 0, 0);
112
113static int
114iobus_probe(device_t dev)
115{
116 char *type = nexus_get_name(dev);
117
118 if (strcmp(type, "psim-iobus") != 0)
119 return (ENXIO);
120
121 device_set_desc(dev, "PSIM local bus");
122 return (0);
123}
124
125/*
126 * Add interrupt/addr range to the dev's resource list if present
127 */
128static void
129iobus_add_intr(phandle_t devnode, struct iobus_devinfo *dinfo)
130{
131 u_int intr = -1;
132
133 if (OF_getprop(devnode, "interrupt", &intr, sizeof(intr)) != -1) {
134 resource_list_add(&dinfo->id_resources,
135 SYS_RES_IRQ, 0, intr, intr, 1);
136 }
137 dinfo->id_interrupt = intr;
138}
139
140
141static void
142iobus_add_reg(phandle_t devnode, struct iobus_devinfo *dinfo,
143 vm_offset_t iobus_off)
144{
145 u_int size;
146 int i;
147
148 size = OF_getprop(devnode, "reg", dinfo->id_reg,sizeof(dinfo->id_reg));
149
150 if (size != -1) {
151 dinfo->id_nregs = size / (sizeof(dinfo->id_reg[0]));
152
153 for (i = 0; i < dinfo->id_nregs; i+= 3) {
154 /*
155 * Scale the absolute addresses back to iobus
156 * relative offsets. This is to better simulate
157 * macio
158 */
159 dinfo->id_reg[i+1] -= iobus_off;
160
161 resource_list_add(&dinfo->id_resources,
162 SYS_RES_MEMORY, 0,
163 dinfo->id_reg[i+1],
164 dinfo->id_reg[i+1] +
165 dinfo->id_reg[i+2],
166 dinfo->id_reg[i+2]);
167 }
168 }
169}
170
171
172static int
173iobus_attach(device_t dev)
174{
175 struct iobus_softc *sc;
176 struct iobus_devinfo *dinfo;
177 phandle_t root;
178 phandle_t child;
179 device_t cdev;
180 char *name;
181 u_int reg[2];
182 int size;
183
184 sc = device_get_softc(dev);
185 sc->sc_node = nexus_get_node(dev);
186
187 /*
188 * Find the base addr/size of the iobus, and initialize the
189 * resource manager
190 */
191 size = OF_getprop(sc->sc_node, "reg", reg, sizeof(reg));
192 if (size == sizeof(reg)) {
193 sc->sc_addr = reg[0];
194 sc->sc_size = reg[1];
195 } else {
196 return (ENXIO);
197 }
198
199 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
200 sc->sc_mem_rman.rm_descr = "IOBus Device Memory";
201 if (rman_init(&sc->sc_mem_rman) != 0) {
202 device_printf(dev,
203 "failed to init mem range resources\n");
204 return (ENXIO);
205 }
206 rman_manage_region(&sc->sc_mem_rman, 0, sc->sc_size);
207
208 /*
209 * Iterate through the sub-devices
210 */
211 root = sc->sc_node;
212
213 for (child = OF_child(root); child != 0; child = OF_peer(child)) {
214 OF_getprop_alloc(child, "name", 1, (void **)&name);
215
216 cdev = device_add_child(dev, NULL, -1);
217 if (cdev != NULL) {
|
218 dinfo = malloc(sizeof(*dinfo), M_IOBUS, M_WAITOK);
| 218 dinfo = malloc(sizeof(*dinfo), M_IOBUS, 0);
|
219 memset(dinfo, 0, sizeof(*dinfo));
220 resource_list_init(&dinfo->id_resources);
221 dinfo->id_node = child;
222 dinfo->id_name = name;
223 iobus_add_intr(child, dinfo);
224 iobus_add_reg(child, dinfo, sc->sc_addr);
225 device_set_ivars(cdev, dinfo);
226 } else {
227 free(name, M_OFWPROP);
228 }
229 }
230
231 return (bus_generic_attach(dev));
232}
233
234
235static int
236iobus_print_child(device_t dev, device_t child)
237{
238 struct iobus_devinfo *dinfo;
239 struct resource_list *rl;
240 int retval = 0;
241
242 dinfo = device_get_ivars(child);
243 rl = &dinfo->id_resources;
244
245 retval += bus_print_child_header(dev, child);
246
247 retval += printf(" offset 0x%x", dinfo->id_reg[1]);
248 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
249
250 retval += bus_print_child_footer(dev, child);
251
252 return (retval);
253}
254
255
256static void
257iobus_probe_nomatch(device_t dev, device_t child)
258{
259}
260
261
262static int
263iobus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
264{
265 struct iobus_devinfo *dinfo;
266
267 if ((dinfo = device_get_ivars(child)) == 0)
268 return (ENOENT);
269
270 switch (which) {
271 case IOBUS_IVAR_NODE:
272 *result = dinfo->id_node;
273 break;
274 case IOBUS_IVAR_NAME:
275 *result = (uintptr_t)dinfo->id_name;
276 break;
277 case IOBUS_IVAR_NREGS:
278 *result = dinfo->id_nregs;
279 break;
280 case IOBUS_IVAR_REGS:
281 *result = (uintptr_t)dinfo->id_reg;
282 break;
283 default:
284 return (ENOENT);
285 }
286
287 return (0);
288}
289
290
291static int
292iobus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
293{
294 return (EINVAL);
295}
296
297
298static struct resource *
299iobus_alloc_resource(device_t bus, device_t child, int type, int *rid,
300 u_long start, u_long end, u_long count, u_int flags)
301{
302 struct iobus_softc *sc;
303 int needactivate;
304 struct resource *rv;
305 struct rman *rm;
306 bus_space_tag_t tagval;
307
308 sc = device_get_softc(bus);
309
310 needactivate = flags & RF_ACTIVE;
311 flags &= ~RF_ACTIVE;
312
313 switch (type) {
314 case SYS_RES_MEMORY:
315 case SYS_RES_IOPORT:
316 rm = &sc->sc_mem_rman;
317 tagval = PPC_BUS_SPACE_MEM;
318 if (flags & PPC_BUS_SPARSE4)
319 tagval |= 4;
320 break;
321 case SYS_RES_IRQ:
322 return (bus_alloc_resource(bus, type, rid, start, end, count,
323 flags));
324 break;
325 default:
326 device_printf(bus, "unknown resource request from %s\n",
327 device_get_nameunit(child));
328 return (NULL);
329 }
330
331 rv = rman_reserve_resource(rm, start, end, count, flags, child);
332 if (rv == NULL) {
333 device_printf(bus, "failed to reserve resource for %s\n",
334 device_get_nameunit(child));
335 return (NULL);
336 }
337
338 rman_set_bustag(rv, tagval);
339 rman_set_bushandle(rv, rman_get_start(rv));
340
341 if (needactivate) {
342 if (bus_activate_resource(child, type, *rid, rv) != 0) {
343 device_printf(bus,
344 "failed to activate resource for %s\n",
345 device_get_nameunit(child));
346 rman_release_resource(rv);
347 return (NULL);
348 }
349 }
350
351 return (rv);
352}
353
354
355static int
356iobus_release_resource(device_t bus, device_t child, int type, int rid,
357 struct resource *res)
358{
359 if (rman_get_flags(res) & RF_ACTIVE) {
360 int error = bus_deactivate_resource(child, type, rid, res);
361 if (error)
362 return error;
363 }
364
365 return (rman_release_resource(res));
366}
367
368
369static int
370iobus_activate_resource(device_t bus, device_t child, int type, int rid,
371 struct resource *res)
372{
373 struct iobus_softc *sc;
374 void *p;
375
376 sc = device_get_softc(bus);
377
378 if (type == SYS_RES_IRQ)
379 return (bus_activate_resource(bus, type, rid, res));
380
381 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
382 p = pmap_mapdev((vm_offset_t)rman_get_start(res) + sc->sc_addr,
383 (vm_size_t)rman_get_size(res));
384 if (p == NULL)
385 return (ENOMEM);
386 rman_set_virtual(res, p);
387 rman_set_bushandle(res, (u_long)p);
388 }
389
390 return (rman_activate_resource(res));
391}
392
393
394static int
395iobus_deactivate_resource(device_t bus, device_t child, int type, int rid,
396 struct resource *res)
397{
398 /*
399 * If this is a memory resource, unmap it.
400 */
401 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
402 u_int32_t psize;
403
404 psize = rman_get_size(res);
405 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
406 }
407
408 return (rman_deactivate_resource(res));
409}
| 219 memset(dinfo, 0, sizeof(*dinfo));
220 resource_list_init(&dinfo->id_resources);
221 dinfo->id_node = child;
222 dinfo->id_name = name;
223 iobus_add_intr(child, dinfo);
224 iobus_add_reg(child, dinfo, sc->sc_addr);
225 device_set_ivars(cdev, dinfo);
226 } else {
227 free(name, M_OFWPROP);
228 }
229 }
230
231 return (bus_generic_attach(dev));
232}
233
234
235static int
236iobus_print_child(device_t dev, device_t child)
237{
238 struct iobus_devinfo *dinfo;
239 struct resource_list *rl;
240 int retval = 0;
241
242 dinfo = device_get_ivars(child);
243 rl = &dinfo->id_resources;
244
245 retval += bus_print_child_header(dev, child);
246
247 retval += printf(" offset 0x%x", dinfo->id_reg[1]);
248 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
249
250 retval += bus_print_child_footer(dev, child);
251
252 return (retval);
253}
254
255
256static void
257iobus_probe_nomatch(device_t dev, device_t child)
258{
259}
260
261
262static int
263iobus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
264{
265 struct iobus_devinfo *dinfo;
266
267 if ((dinfo = device_get_ivars(child)) == 0)
268 return (ENOENT);
269
270 switch (which) {
271 case IOBUS_IVAR_NODE:
272 *result = dinfo->id_node;
273 break;
274 case IOBUS_IVAR_NAME:
275 *result = (uintptr_t)dinfo->id_name;
276 break;
277 case IOBUS_IVAR_NREGS:
278 *result = dinfo->id_nregs;
279 break;
280 case IOBUS_IVAR_REGS:
281 *result = (uintptr_t)dinfo->id_reg;
282 break;
283 default:
284 return (ENOENT);
285 }
286
287 return (0);
288}
289
290
291static int
292iobus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
293{
294 return (EINVAL);
295}
296
297
298static struct resource *
299iobus_alloc_resource(device_t bus, device_t child, int type, int *rid,
300 u_long start, u_long end, u_long count, u_int flags)
301{
302 struct iobus_softc *sc;
303 int needactivate;
304 struct resource *rv;
305 struct rman *rm;
306 bus_space_tag_t tagval;
307
308 sc = device_get_softc(bus);
309
310 needactivate = flags & RF_ACTIVE;
311 flags &= ~RF_ACTIVE;
312
313 switch (type) {
314 case SYS_RES_MEMORY:
315 case SYS_RES_IOPORT:
316 rm = &sc->sc_mem_rman;
317 tagval = PPC_BUS_SPACE_MEM;
318 if (flags & PPC_BUS_SPARSE4)
319 tagval |= 4;
320 break;
321 case SYS_RES_IRQ:
322 return (bus_alloc_resource(bus, type, rid, start, end, count,
323 flags));
324 break;
325 default:
326 device_printf(bus, "unknown resource request from %s\n",
327 device_get_nameunit(child));
328 return (NULL);
329 }
330
331 rv = rman_reserve_resource(rm, start, end, count, flags, child);
332 if (rv == NULL) {
333 device_printf(bus, "failed to reserve resource for %s\n",
334 device_get_nameunit(child));
335 return (NULL);
336 }
337
338 rman_set_bustag(rv, tagval);
339 rman_set_bushandle(rv, rman_get_start(rv));
340
341 if (needactivate) {
342 if (bus_activate_resource(child, type, *rid, rv) != 0) {
343 device_printf(bus,
344 "failed to activate resource for %s\n",
345 device_get_nameunit(child));
346 rman_release_resource(rv);
347 return (NULL);
348 }
349 }
350
351 return (rv);
352}
353
354
355static int
356iobus_release_resource(device_t bus, device_t child, int type, int rid,
357 struct resource *res)
358{
359 if (rman_get_flags(res) & RF_ACTIVE) {
360 int error = bus_deactivate_resource(child, type, rid, res);
361 if (error)
362 return error;
363 }
364
365 return (rman_release_resource(res));
366}
367
368
369static int
370iobus_activate_resource(device_t bus, device_t child, int type, int rid,
371 struct resource *res)
372{
373 struct iobus_softc *sc;
374 void *p;
375
376 sc = device_get_softc(bus);
377
378 if (type == SYS_RES_IRQ)
379 return (bus_activate_resource(bus, type, rid, res));
380
381 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
382 p = pmap_mapdev((vm_offset_t)rman_get_start(res) + sc->sc_addr,
383 (vm_size_t)rman_get_size(res));
384 if (p == NULL)
385 return (ENOMEM);
386 rman_set_virtual(res, p);
387 rman_set_bushandle(res, (u_long)p);
388 }
389
390 return (rman_activate_resource(res));
391}
392
393
394static int
395iobus_deactivate_resource(device_t bus, device_t child, int type, int rid,
396 struct resource *res)
397{
398 /*
399 * If this is a memory resource, unmap it.
400 */
401 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
402 u_int32_t psize;
403
404 psize = rman_get_size(res);
405 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
406 }
407
408 return (rman_deactivate_resource(res));
409}
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