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 Arm 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 I/O memory address space.
41 #include "opt_platform.h"
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
46 #include <sys/param.h>
47 #include <sys/systm.h>
49 #include <sys/kernel.h>
50 #include <sys/malloc.h>
51 #include <sys/module.h>
52 #include <machine/bus.h>
54 #include <sys/interrupt.h>
56 #include <machine/machdep.h>
57 #include <machine/vmparam.h>
58 #include <machine/pcb.h>
62 #include <machine/resource.h>
63 #include <machine/intr.h>
66 #include <dev/ofw/ofw_bus_subr.h>
67 #include <dev/ofw/openfirm.h>
68 #include "ofw_bus_if.h"
71 #include <contrib/dev/acpica/include/acpi.h>
72 #include <dev/acpica/acpivar.h>
73 #include "acpi_bus_if.h"
77 extern struct bus_space memmap_bus;
79 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
82 struct resource_list nx_resources;
85 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
87 static struct rman mem_rman;
88 static struct rman irq_rman;
90 static int nexus_attach(device_t);
93 static device_probe_t nexus_fdt_probe;
94 static device_attach_t nexus_fdt_attach;
97 static device_probe_t nexus_acpi_probe;
98 static device_attach_t nexus_acpi_attach;
101 static int nexus_print_child(device_t, device_t);
102 static device_t nexus_add_child(device_t, u_int, const char *, int);
103 static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
104 rman_res_t, rman_res_t, rman_res_t, u_int);
105 static int nexus_activate_resource(device_t, device_t, int, int,
107 static int nexus_map_resource(device_t, device_t, int, struct resource *,
108 struct resource_map_request *, struct resource_map *);
109 static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
110 enum intr_polarity pol);
111 static struct resource_list *nexus_get_reslist(device_t, device_t);
112 static int nexus_set_resource(device_t, device_t, int, int,
113 rman_res_t, rman_res_t);
114 static int nexus_deactivate_resource(device_t, device_t, int, int,
116 static int nexus_release_resource(device_t, device_t, int, int,
119 static int nexus_setup_intr(device_t dev, device_t child, struct resource *res,
120 int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep);
121 static int nexus_teardown_intr(device_t, device_t, struct resource *, void *);
122 static bus_space_tag_t nexus_get_bus_tag(device_t, device_t);
124 static int nexus_bind_intr(device_t, device_t, struct resource *, int);
128 static int nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent,
129 int icells, pcell_t *intr);
132 static device_method_t nexus_methods[] = {
134 DEVMETHOD(bus_print_child, nexus_print_child),
135 DEVMETHOD(bus_add_child, nexus_add_child),
136 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
137 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
138 DEVMETHOD(bus_map_resource, nexus_map_resource),
139 DEVMETHOD(bus_config_intr, nexus_config_intr),
140 DEVMETHOD(bus_get_resource_list, nexus_get_reslist),
141 DEVMETHOD(bus_set_resource, nexus_set_resource),
142 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
143 DEVMETHOD(bus_release_resource, nexus_release_resource),
144 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
145 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
146 DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag),
148 DEVMETHOD(bus_bind_intr, nexus_bind_intr),
153 static driver_t nexus_driver = {
160 nexus_attach(device_t dev)
163 mem_rman.rm_start = 0;
164 mem_rman.rm_end = BUS_SPACE_MAXADDR;
165 mem_rman.rm_type = RMAN_ARRAY;
166 mem_rman.rm_descr = "I/O memory addresses";
167 if (rman_init(&mem_rman) ||
168 rman_manage_region(&mem_rman, 0, BUS_SPACE_MAXADDR))
169 panic("nexus_attach mem_rman");
170 irq_rman.rm_start = 0;
171 irq_rman.rm_end = ~0;
172 irq_rman.rm_type = RMAN_ARRAY;
173 irq_rman.rm_descr = "Interrupts";
174 if (rman_init(&irq_rman) || rman_manage_region(&irq_rman, 0, ~0))
175 panic("nexus_attach irq_rman");
177 bus_generic_probe(dev);
178 bus_generic_attach(dev);
184 nexus_print_child(device_t bus, device_t child)
188 retval += bus_print_child_header(bus, child);
189 retval += printf("\n");
195 nexus_add_child(device_t bus, u_int order, const char *name, int unit)
198 struct nexus_device *ndev;
200 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
203 resource_list_init(&ndev->nx_resources);
205 child = device_add_child_ordered(bus, order, name, unit);
207 /* should we free this in nexus_child_detached? */
208 device_set_ivars(child, ndev);
214 * Allocate a resource on behalf of child. NB: child is usually going to be a
215 * child of one of our descendants, not a direct child of nexus0.
216 * (Exceptions include footbridge.)
218 static struct resource *
219 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
220 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
222 struct nexus_device *ndev = DEVTONX(child);
224 struct resource_list_entry *rle;
226 int needactivate = flags & RF_ACTIVE;
229 * If this is an allocation of the "default" range for a given
230 * RID, and we know what the resources for this device are
231 * (ie. they aren't maintained by a child bus), then work out
232 * the start/end values.
234 if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) {
235 if (device_get_parent(child) != bus || ndev == NULL)
237 rle = resource_list_find(&ndev->nx_resources, type, *rid);
259 rv = rman_reserve_resource(rm, start, end, count, flags, child);
263 rman_set_rid(rv, *rid);
264 rman_set_bushandle(rv, rman_get_start(rv));
267 if (bus_activate_resource(child, type, *rid, rv)) {
268 rman_release_resource(rv);
277 nexus_release_resource(device_t bus, device_t child, int type, int rid,
278 struct resource *res)
282 if (rman_get_flags(res) & RF_ACTIVE) {
283 error = bus_deactivate_resource(child, type, rid, res);
287 return (rman_release_resource(res));
291 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
292 enum intr_polarity pol)
296 * On arm64 (due to INTRNG), ACPI interrupt configuration is
297 * done in nexus_acpi_map_intr().
303 nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
304 driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep)
308 if ((rman_get_flags(res) & RF_SHAREABLE) == 0)
311 /* We depend here on rman_activate_resource() being idempotent. */
312 error = rman_activate_resource(res);
316 error = intr_setup_irq(child, res, filt, intr, arg, flags, cookiep);
322 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
325 return (intr_teardown_irq(child, r, ih));
330 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu)
333 return (intr_bind_irq(child, irq, cpu));
337 static bus_space_tag_t
338 nexus_get_bus_tag(device_t bus __unused, device_t child __unused)
345 nexus_activate_resource(device_t bus, device_t child, int type, int rid,
348 struct resource_map map;
351 if ((err = rman_activate_resource(r)) != 0)
355 * If this is a memory resource, map it into the kernel.
360 if ((rman_get_flags(r) & RF_UNMAPPED) == 0) {
361 err = nexus_map_resource(bus, child, type, r, NULL,
364 rman_deactivate_resource(r);
368 rman_set_mapping(r, &map);
372 err = intr_activate_irq(child, r);
374 rman_deactivate_resource(r);
381 static struct resource_list *
382 nexus_get_reslist(device_t dev, device_t child)
384 struct nexus_device *ndev = DEVTONX(child);
386 return (&ndev->nx_resources);
390 nexus_set_resource(device_t dev, device_t child, int type, int rid,
391 rman_res_t start, rman_res_t count)
393 struct nexus_device *ndev = DEVTONX(child);
394 struct resource_list *rl = &ndev->nx_resources;
396 /* XXX this should return a success/failure indicator */
397 resource_list_add(rl, type, rid, start, start + count - 1, count);
403 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
407 bus_space_handle_t vaddr;
409 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
410 psize = (bus_size_t)rman_get_size(r);
411 vaddr = rman_get_bushandle(r);
414 bus_space_unmap(&memmap_bus, vaddr, psize);
415 rman_set_virtual(r, NULL);
416 rman_set_bushandle(r, 0);
418 } else if (type == SYS_RES_IRQ) {
419 intr_deactivate_irq(child, r);
422 return (rman_deactivate_resource(r));
426 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r,
427 struct resource_map_request *argsp, struct resource_map *map)
429 struct resource_map_request args;
430 rman_res_t end, length, start;
432 /* Resources must be active to be mapped. */
433 if ((rman_get_flags(r) & RF_ACTIVE) == 0)
436 /* Mappings are only supported on I/O and memory resources. */
445 resource_init_map_request(&args);
447 bcopy(argsp, &args, imin(argsp->size, args.size));
448 start = rman_get_start(r) + args.offset;
449 if (args.length == 0)
450 length = rman_get_size(r);
452 length = args.length;
453 end = start + length - 1;
454 if (start > rman_get_end(r) || start < rman_get_start(r))
456 if (end > rman_get_end(r) || end < start)
459 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr);
460 map->r_bustag = &memmap_bus;
461 map->r_size = length;
464 * The handle is the virtual address.
466 map->r_bushandle = (bus_space_handle_t)map->r_vaddr;
471 static device_method_t nexus_fdt_methods[] = {
472 /* Device interface */
473 DEVMETHOD(device_probe, nexus_fdt_probe),
474 DEVMETHOD(device_attach, nexus_fdt_attach),
477 DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr),
482 #define nexus_baseclasses nexus_fdt_baseclasses
483 DEFINE_CLASS_1(nexus, nexus_fdt_driver, nexus_fdt_methods, 1, nexus_driver);
484 #undef nexus_baseclasses
486 EARLY_DRIVER_MODULE(nexus_fdt, root, nexus_fdt_driver, 0, 0,
487 BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
490 nexus_fdt_probe(device_t dev)
493 if (arm64_bus_method != ARM64_BUS_FDT)
497 return (BUS_PROBE_DEFAULT);
501 nexus_fdt_attach(device_t dev)
504 nexus_add_child(dev, 10, "ofwbus", 0);
505 return (nexus_attach(dev));
509 nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells,
513 struct intr_map_data_fdt *fdt_data;
516 len = sizeof(*fdt_data) + icells * sizeof(pcell_t);
517 fdt_data = (struct intr_map_data_fdt *)intr_alloc_map_data(
518 INTR_MAP_DATA_FDT, len, M_WAITOK | M_ZERO);
519 fdt_data->iparent = iparent;
520 fdt_data->ncells = icells;
521 memcpy(fdt_data->cells, intr, icells * sizeof(pcell_t));
522 irq = intr_map_irq(NULL, iparent, (struct intr_map_data *)fdt_data);
528 static int nexus_acpi_map_intr(device_t dev, device_t child, u_int irq, int trig, int pol);
530 static device_method_t nexus_acpi_methods[] = {
531 /* Device interface */
532 DEVMETHOD(device_probe, nexus_acpi_probe),
533 DEVMETHOD(device_attach, nexus_acpi_attach),
536 DEVMETHOD(acpi_bus_map_intr, nexus_acpi_map_intr),
541 #define nexus_baseclasses nexus_acpi_baseclasses
542 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1,
544 #undef nexus_baseclasses
546 EARLY_DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, 0, 0,
547 BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
550 nexus_acpi_probe(device_t dev)
553 if (arm64_bus_method != ARM64_BUS_ACPI || acpi_identify() != 0)
557 return (BUS_PROBE_LOW_PRIORITY);
561 nexus_acpi_attach(device_t dev)
564 nexus_add_child(dev, 10, "acpi", 0);
565 return (nexus_attach(dev));
569 nexus_acpi_map_intr(device_t dev, device_t child, u_int irq, int trig, int pol)
571 struct intr_map_data_acpi *acpi_data;
574 len = sizeof(*acpi_data);
575 acpi_data = (struct intr_map_data_acpi *)intr_alloc_map_data(
576 INTR_MAP_DATA_ACPI, len, M_WAITOK | M_ZERO);
577 acpi_data->irq = irq;
578 acpi_data->pol = pol;
579 acpi_data->trig = trig;
582 * TODO: This will only handle a single interrupt controller.
583 * ACPI will map multiple controllers into a single virtual IRQ
584 * space. Each controller has a System Vector Base to hold the
585 * first irq it handles in this space. As such the correct way
586 * to handle interrupts with ACPI is to search through the
587 * controllers for the largest base value that is no larger than
590 irq = intr_map_irq(NULL, ACPI_INTR_XREF,
591 (struct intr_map_data *)acpi_data);