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, DMA requests (which rightfully should be a part of the
38 * ISA code but it's easier to do it here for now), I/O port addresses,
39 * and I/O memory address space.
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
45 #include <sys/param.h>
46 #include <sys/systm.h>
48 #include <sys/kernel.h>
49 #include <sys/malloc.h>
50 #include <sys/module.h>
51 #include <machine/bus.h>
53 #include <sys/interrupt.h>
55 #include <machine/vmparam.h>
56 #include <machine/pcb.h>
60 #include <machine/resource.h>
61 #include <machine/intr.h>
64 #include "opt_platform.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>
75 extern struct bus_space memmap_bus;
77 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
80 struct resource_list nx_resources;
83 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
85 static struct rman mem_rman;
86 static struct rman irq_rman;
88 static int nexus_attach(device_t);
91 static device_probe_t nexus_fdt_probe;
92 static device_attach_t nexus_fdt_attach;
95 static device_probe_t nexus_acpi_probe;
96 static device_attach_t nexus_acpi_attach;
99 static int nexus_print_child(device_t, device_t);
100 static device_t nexus_add_child(device_t, u_int, const char *, int);
101 static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
102 rman_res_t, rman_res_t, rman_res_t, u_int);
103 static int nexus_activate_resource(device_t, device_t, int, int,
105 static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
106 enum intr_polarity pol);
107 static struct resource_list *nexus_get_reslist(device_t, device_t);
108 static int nexus_set_resource(device_t, device_t, int, int,
109 rman_res_t, rman_res_t);
110 static int nexus_deactivate_resource(device_t, device_t, int, int,
113 static int nexus_setup_intr(device_t dev, device_t child, struct resource *res,
114 int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep);
115 static int nexus_teardown_intr(device_t, device_t, struct resource *, void *);
118 static int nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent,
119 int icells, pcell_t *intr);
122 static device_method_t nexus_methods[] = {
124 DEVMETHOD(bus_print_child, nexus_print_child),
125 DEVMETHOD(bus_add_child, nexus_add_child),
126 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
127 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
128 DEVMETHOD(bus_config_intr, nexus_config_intr),
129 DEVMETHOD(bus_get_resource_list, nexus_get_reslist),
130 DEVMETHOD(bus_set_resource, nexus_set_resource),
131 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
132 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
133 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
138 static driver_t nexus_driver = {
145 nexus_attach(device_t dev)
148 mem_rman.rm_start = 0;
149 mem_rman.rm_end = ~0ul;
150 mem_rman.rm_type = RMAN_ARRAY;
151 mem_rman.rm_descr = "I/O memory addresses";
152 if (rman_init(&mem_rman) || rman_manage_region(&mem_rman, 0, ~0))
153 panic("nexus_attach mem_rman");
154 irq_rman.rm_start = 0;
155 irq_rman.rm_end = ~0ul;
156 irq_rman.rm_type = RMAN_ARRAY;
157 irq_rman.rm_descr = "Interrupts";
158 if (rman_init(&irq_rman) || rman_manage_region(&irq_rman, 0, ~0))
159 panic("nexus_attach irq_rman");
161 bus_generic_probe(dev);
162 bus_generic_attach(dev);
168 nexus_print_child(device_t bus, device_t child)
172 retval += bus_print_child_header(bus, child);
173 retval += printf("\n");
179 nexus_add_child(device_t bus, u_int order, const char *name, int unit)
182 struct nexus_device *ndev;
184 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
187 resource_list_init(&ndev->nx_resources);
189 child = device_add_child_ordered(bus, order, name, unit);
191 /* should we free this in nexus_child_detached? */
192 device_set_ivars(child, ndev);
199 * Allocate a resource on behalf of child. NB: child is usually going to be a
200 * child of one of our descendants, not a direct child of nexus0.
201 * (Exceptions include footbridge.)
203 static struct resource *
204 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
205 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
207 struct nexus_device *ndev = DEVTONX(child);
209 struct resource_list_entry *rle;
211 int needactivate = flags & RF_ACTIVE;
214 * If this is an allocation of the "default" range for a given
215 * RID, and we know what the resources for this device are
216 * (ie. they aren't maintained by a child bus), then work out
217 * the start/end values.
219 if ((start == 0UL) && (end == ~0UL) && (count == 1)) {
220 if (device_get_parent(child) != bus || ndev == NULL)
222 rle = resource_list_find(&ndev->nx_resources, type, *rid);
244 rv = rman_reserve_resource(rm, start, end, count, flags, child);
248 rman_set_rid(rv, *rid);
249 rman_set_bushandle(rv, rman_get_start(rv));
252 if (bus_activate_resource(child, type, *rid, rv)) {
253 rman_release_resource(rv);
262 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
263 enum intr_polarity pol)
266 return (arm_config_intr(irq, trig, pol));
270 nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
271 driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep)
275 if ((rman_get_flags(res) & RF_SHAREABLE) == 0)
278 /* We depend here on rman_activate_resource() being idempotent. */
279 error = rman_activate_resource(res);
283 error = arm_setup_intr(device_get_nameunit(child), filt, intr,
284 arg, rman_get_start(res), flags, cookiep);
290 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
293 return (arm_teardown_intr(ih));
297 nexus_activate_resource(device_t bus, device_t child, int type, int rid,
303 bus_space_handle_t vaddr;
305 if ((err = rman_activate_resource(r)) != 0)
309 * If this is a memory resource, map it into the kernel.
311 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
312 paddr = (bus_addr_t)rman_get_start(r);
313 psize = (bus_size_t)rman_get_size(r);
314 err = bus_space_map(&memmap_bus, paddr, psize, 0, &vaddr);
316 rman_deactivate_resource(r);
319 rman_set_bustag(r, &memmap_bus);
320 rman_set_virtual(r, (void *)vaddr);
321 rman_set_bushandle(r, vaddr);
326 static struct resource_list *
327 nexus_get_reslist(device_t dev, device_t child)
329 struct nexus_device *ndev = DEVTONX(child);
331 return (&ndev->nx_resources);
335 nexus_set_resource(device_t dev, device_t child, int type, int rid,
336 rman_res_t start, rman_res_t count)
338 struct nexus_device *ndev = DEVTONX(child);
339 struct resource_list *rl = &ndev->nx_resources;
341 /* XXX this should return a success/failure indicator */
342 resource_list_add(rl, type, rid, start, start + count - 1, count);
349 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
353 bus_space_handle_t vaddr;
355 psize = (bus_size_t)rman_get_size(r);
356 vaddr = rman_get_bushandle(r);
359 bus_space_unmap(&memmap_bus, vaddr, psize);
360 rman_set_virtual(r, NULL);
361 rman_set_bushandle(r, 0);
364 return (rman_deactivate_resource(r));
368 static device_method_t nexus_fdt_methods[] = {
369 /* Device interface */
370 DEVMETHOD(device_probe, nexus_fdt_probe),
371 DEVMETHOD(device_attach, nexus_fdt_attach),
374 DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr),
377 #define nexus_baseclasses nexus_fdt_baseclasses
378 DEFINE_CLASS_1(nexus, nexus_fdt_driver, nexus_fdt_methods, 1, nexus_driver);
379 #undef nexus_baseclasses
380 static devclass_t nexus_fdt_devclass;
382 EARLY_DRIVER_MODULE(nexus_fdt, root, nexus_fdt_driver, nexus_fdt_devclass,
383 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
386 nexus_fdt_probe(device_t dev)
393 return (BUS_PROBE_DEFAULT);
397 nexus_fdt_attach(device_t dev)
400 nexus_add_child(dev, 10, "ofwbus", 0);
401 return (nexus_attach(dev));
405 nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells,
424 static device_method_t nexus_acpi_methods[] = {
425 /* Device interface */
426 DEVMETHOD(device_probe, nexus_acpi_probe),
427 DEVMETHOD(device_attach, nexus_acpi_attach),
430 #define nexus_baseclasses nexus_acpi_baseclasses
431 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1,
433 #undef nexus_baseclasses
434 static devclass_t nexus_acpi_devclass;
436 EARLY_DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_acpi_devclass,
437 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
440 nexus_acpi_probe(device_t dev)
443 if (acpi_identify() != 0)
447 return (BUS_PROBE_LOW_PRIORITY);
451 nexus_acpi_attach(device_t dev)
454 nexus_add_child(dev, 10, "acpi", 0);
455 return (nexus_attach(dev));