2 * Copyright 1998 Massachusetts Institute of Technology
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * This code implements a `root nexus' for MIPS Architecture
33 * machines. The function of the root nexus is to serve as an
34 * attachment point for both processors and buses, and to manage
35 * resources which are common to all of them. In particular,
36 * this code implements the core resource managers for interrupt
37 * requests and memory address space.
39 #include "opt_platform.h"
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/param.h>
45 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/malloc.h>
49 #include <sys/module.h>
51 #include <sys/interrupt.h>
56 #include <machine/bus.h>
57 #include <machine/resource.h>
58 #include <machine/vmparam.h>
61 #include <machine/intr.h>
63 #include <machine/intr_machdep.h>
67 #include <dev/ofw/openfirm.h>
68 #include "ofw_bus_if.h"
73 #define dprintf printf
75 #define dprintf(x, arg...)
76 #endif /* NEXUS_DEBUG */
78 #define NUM_MIPS_IRQS 6
80 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
83 struct resource_list nx_resources;
86 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
88 static struct rman irq_rman;
89 static struct rman mem_rman;
91 static struct resource *
92 nexus_alloc_resource(device_t, device_t, int, int *, rman_res_t,
93 rman_res_t, rman_res_t, u_int);
94 static device_t nexus_add_child(device_t, u_int, const char *, int);
95 static int nexus_attach(device_t);
96 static void nexus_delete_resource(device_t, device_t, int, int);
97 static struct resource_list *
98 nexus_get_reslist(device_t, device_t);
99 static int nexus_get_resource(device_t, device_t, int, int, rman_res_t *,
101 static int nexus_print_child(device_t, device_t);
102 static int nexus_print_all_resources(device_t dev);
103 static int nexus_probe(device_t);
104 static int nexus_release_resource(device_t, device_t, int, int,
106 static int nexus_set_resource(device_t, device_t, int, int, rman_res_t,
108 static int nexus_activate_resource(device_t, device_t, int, int,
110 static int nexus_deactivate_resource(device_t, device_t, int, int,
112 static void nexus_hinted_child(device_t, const char *, int);
113 static int nexus_setup_intr(device_t dev, device_t child,
114 struct resource *res, int flags, driver_filter_t *filt,
115 driver_intr_t *intr, void *arg, void **cookiep);
116 static int nexus_teardown_intr(device_t, device_t, struct resource *,
120 static int nexus_bind_intr(device_t, device_t, struct resource *, int);
123 static int nexus_ofw_map_intr(device_t dev, device_t child,
124 phandle_t iparent, int icells, pcell_t *intr);
126 static int nexus_describe_intr(device_t dev, device_t child,
127 struct resource *irq, void *cookie, const char *descr);
128 static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
129 enum intr_polarity pol);
132 static device_method_t nexus_methods[] = {
133 /* Device interface */
134 DEVMETHOD(device_probe, nexus_probe),
135 DEVMETHOD(device_attach, nexus_attach),
138 DEVMETHOD(bus_add_child, nexus_add_child),
139 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
140 DEVMETHOD(bus_delete_resource, nexus_delete_resource),
141 DEVMETHOD(bus_get_resource, nexus_get_resource),
142 DEVMETHOD(bus_get_resource_list, nexus_get_reslist),
143 DEVMETHOD(bus_print_child, nexus_print_child),
144 DEVMETHOD(bus_release_resource, nexus_release_resource),
145 DEVMETHOD(bus_set_resource, nexus_set_resource),
146 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
147 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
148 DEVMETHOD(bus_activate_resource,nexus_activate_resource),
149 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
150 DEVMETHOD(bus_hinted_child, nexus_hinted_child),
152 DEVMETHOD(bus_config_intr, nexus_config_intr),
153 DEVMETHOD(bus_describe_intr, nexus_describe_intr),
155 DEVMETHOD(bus_bind_intr, nexus_bind_intr),
158 DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr),
165 static driver_t nexus_driver = {
170 static devclass_t nexus_devclass;
173 nexus_probe(device_t dev)
176 device_set_desc(dev, "MIPS32 root nexus");
178 irq_rman.rm_start = 0;
179 irq_rman.rm_end = NUM_MIPS_IRQS - 1;
180 irq_rman.rm_type = RMAN_ARRAY;
181 irq_rman.rm_descr = "Hardware IRQs";
182 if (rman_init(&irq_rman) != 0 ||
183 rman_manage_region(&irq_rman, 0, NUM_MIPS_IRQS - 1) != 0) {
184 panic("%s: irq_rman", __func__);
187 mem_rman.rm_start = 0;
188 mem_rman.rm_end = BUS_SPACE_MAXADDR;
189 mem_rman.rm_type = RMAN_ARRAY;
190 mem_rman.rm_descr = "Memory addresses";
191 if (rman_init(&mem_rman) != 0 ||
192 rman_manage_region(&mem_rman, 0, BUS_SPACE_MAXADDR) != 0) {
193 panic("%s: mem_rman", __func__);
200 nexus_attach(device_t dev)
203 bus_generic_probe(dev);
204 bus_enumerate_hinted_children(dev);
205 bus_generic_attach(dev);
211 nexus_print_child(device_t bus, device_t child)
215 retval += bus_print_child_header(bus, child);
216 retval += nexus_print_all_resources(child);
217 if (device_get_flags(child))
218 retval += printf(" flags %#x", device_get_flags(child));
219 retval += printf(" on %s\n", device_get_nameunit(bus));
225 nexus_print_all_resources(device_t dev)
227 struct nexus_device *ndev = DEVTONX(dev);
228 struct resource_list *rl = &ndev->nx_resources;
231 if (STAILQ_FIRST(rl))
232 retval += printf(" at");
234 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
235 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
241 nexus_add_child(device_t bus, u_int order, const char *name, int unit)
244 struct nexus_device *ndev;
246 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
249 resource_list_init(&ndev->nx_resources);
251 child = device_add_child_ordered(bus, order, name, unit);
253 device_printf(bus, "failed to add child: %s%d\n", name, unit);
257 /* should we free this in nexus_child_detached? */
258 device_set_ivars(child, ndev);
264 * Allocate a resource on behalf of child. NB: child is usually going to be a
265 * child of one of our descendants, not a direct child of nexus0.
266 * (Exceptions include footbridge.)
268 static struct resource *
269 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
270 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
272 struct nexus_device *ndev = DEVTONX(child);
274 struct resource_list_entry *rle;
276 int isdefault, needactivate, passthrough;
278 dprintf("%s: entry (%p, %p, %d, %p, %p, %p, %jd, %d)\n",
279 __func__, bus, child, type, rid, (void *)(intptr_t)start,
280 (void *)(intptr_t)end, count, flags);
281 dprintf("%s: requested rid is %d\n", __func__, *rid);
283 isdefault = (RMAN_IS_DEFAULT_RANGE(start, end) && count == 1);
284 needactivate = flags & RF_ACTIVE;
285 passthrough = (device_get_parent(child) != bus);
289 * If this is an allocation of the "default" range for a given RID,
290 * and we know what the resources for this device are (ie. they aren't
291 * maintained by a child bus), then work out the start/end values.
294 rle = resource_list_find(&ndev->nx_resources, type, *rid);
297 if (rle->res != NULL) {
298 panic("%s: resource entry is busy", __func__);
313 printf("%s: unknown resource type %d\n", __func__, type);
317 rv = rman_reserve_resource(rm, start, end, count, flags, child);
319 printf("%s: could not reserve resource for %s\n", __func__,
320 device_get_nameunit(child));
324 rman_set_rid(rv, *rid);
327 if (bus_activate_resource(child, type, *rid, rv)) {
328 printf("%s: could not activate resource\n", __func__);
329 rman_release_resource(rv);
337 static struct resource_list *
338 nexus_get_reslist(device_t dev, device_t child)
340 struct nexus_device *ndev = DEVTONX(child);
342 return (&ndev->nx_resources);
346 nexus_set_resource(device_t dev, device_t child, int type, int rid,
347 rman_res_t start, rman_res_t count)
349 struct nexus_device *ndev = DEVTONX(child);
350 struct resource_list *rl = &ndev->nx_resources;
351 struct resource_list_entry *rle;
353 dprintf("%s: entry (%p, %p, %d, %d, %p, %jd)\n",
354 __func__, dev, child, type, rid, (void *)(intptr_t)start, count);
356 rle = resource_list_add(rl, type, rid, start, start + count - 1,
365 nexus_get_resource(device_t dev, device_t child, int type, int rid,
366 rman_res_t *startp, rman_res_t *countp)
368 struct nexus_device *ndev = DEVTONX(child);
369 struct resource_list *rl = &ndev->nx_resources;
370 struct resource_list_entry *rle;
372 rle = resource_list_find(rl, type, rid);
376 *startp = rle->start;
378 *countp = rle->count;
383 nexus_delete_resource(device_t dev, device_t child, int type, int rid)
385 struct nexus_device *ndev = DEVTONX(child);
386 struct resource_list *rl = &ndev->nx_resources;
388 dprintf("%s: entry\n", __func__);
390 resource_list_delete(rl, type, rid);
394 nexus_release_resource(device_t bus, device_t child, int type, int rid,
397 dprintf("%s: entry\n", __func__);
399 if (rman_get_flags(r) & RF_ACTIVE) {
400 int error = bus_deactivate_resource(child, type, rid, r);
405 return (rman_release_resource(r));
409 nexus_activate_resource(device_t bus, device_t child, int type, int rid,
418 * If this is a memory resource, use pmap_mapdev to map it.
420 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
421 paddr = rman_get_start(r);
422 psize = rman_get_size(r);
423 rman_set_bustag(r, mips_bus_space_generic);
424 err = bus_space_map(rman_get_bustag(r), paddr, psize, 0,
425 (bus_space_handle_t *)&vaddr);
427 rman_deactivate_resource(r);
430 rman_set_virtual(r, vaddr);
431 rman_set_bushandle(r, (bus_space_handle_t)(uintptr_t)vaddr);
434 return (rman_activate_resource(r));
438 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
441 bus_space_handle_t vaddr;
444 vaddr = rman_get_bushandle(r);
446 if (type == SYS_RES_MEMORY && vaddr != 0) {
447 psize = (bus_size_t)rman_get_size(r);
448 bus_space_unmap(rman_get_bustag(r), vaddr, psize);
449 rman_set_virtual(r, NULL);
450 rman_set_bushandle(r, 0);
453 return (rman_deactivate_resource(r));
457 nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
458 driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep)
463 for (irq = rman_get_start(res); irq <= rman_get_end(res); irq++) {
464 intr_irq_add_handler(child, filt, intr, arg, irq, flags,
471 irq = rman_get_start(res);
472 if (irq >= NUM_MIPS_IRQS) {
477 cpu_establish_hardintr(device_get_nameunit(child), filt, intr, arg,
478 irq, flags, cookiep);
485 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
489 return (intr_irq_remove_handler(child, rman_get_start(r), ih));
491 printf("Unimplemented %s at %s:%d\n", __func__, __FILE__, __LINE__);
498 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
499 enum intr_polarity pol)
502 return (intr_irq_config(irq, trig, pol));
506 nexus_describe_intr(device_t dev, device_t child, struct resource *irq,
507 void *cookie, const char *descr)
510 return (intr_irq_describe(rman_get_start(irq), cookie, descr));
515 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu)
518 return (intr_irq_bind(rman_get_start(irq), cpu));
524 nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells,
528 return (intr_fdt_map_irq(iparent, intr, icells));
531 #endif /* MIPS_INTRNG */
534 nexus_hinted_child(device_t bus, const char *dname, int dunit)
544 if ((resource_int_value(dname, dunit, "order", &order)) != 0)
546 child = BUS_ADD_CHILD(bus, order, dname, dunit);
551 * Set hard-wired resources for hinted child using
555 if (resource_long_value(dname, dunit, "maddr", &maddr) == 0)
557 if (resource_int_value(dname, dunit, "msize", &msize) == 0)
560 /* check if all info for mem resource has been provided */
561 if ((mem_hints_count > 0) && (mem_hints_count < 2)) {
562 printf("Either maddr or msize hint is missing for %s%d\n",
565 else if (mem_hints_count) {
566 dprintf("%s: discovered hinted child %s at maddr %p(%d)\n",
567 __func__, device_get_nameunit(child),
568 (void *)(intptr_t)maddr, msize);
570 result = bus_set_resource(child, SYS_RES_MEMORY, 0, maddr,
574 "warning: bus_set_resource() failed\n");
578 if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
579 result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
582 "warning: bus_set_resource() failed\n");
586 EARLY_DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0,
587 BUS_PASS_BUS + BUS_PASS_ORDER_EARLY);