2 * Copyright (c) 2015 The FreeBSD Foundation
5 * This software was developed by Semihalf under
6 * the sponsorship of the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/bitstring.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
41 #include <machine/intr.h>
42 #include <machine/resource.h>
44 #include <dev/ofw/openfirm.h>
45 #include <dev/ofw/ofw_bus.h>
46 #include <dev/ofw/ofw_bus_subr.h>
48 #include "gic_v3_reg.h"
49 #include "gic_v3_var.h"
54 static int gic_v3_fdt_probe(device_t);
55 static int gic_v3_fdt_attach(device_t);
56 static int gic_v3_fdt_print_child(device_t, device_t);
58 static struct resource *gic_v3_ofw_bus_alloc_res(device_t, device_t, int, int *,
59 rman_res_t, rman_res_t, rman_res_t, u_int);
60 static const struct ofw_bus_devinfo *gic_v3_ofw_get_devinfo(device_t, device_t);
62 static device_method_t gic_v3_fdt_methods[] = {
63 /* Device interface */
64 DEVMETHOD(device_probe, gic_v3_fdt_probe),
65 DEVMETHOD(device_attach, gic_v3_fdt_attach),
68 DEVMETHOD(bus_print_child, gic_v3_fdt_print_child),
69 DEVMETHOD(bus_alloc_resource, gic_v3_ofw_bus_alloc_res),
70 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
72 /* ofw_bus interface */
73 DEVMETHOD(ofw_bus_get_devinfo, gic_v3_ofw_get_devinfo),
74 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
75 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
76 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
77 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
78 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
84 DEFINE_CLASS_1(gic, gic_v3_fdt_driver, gic_v3_fdt_methods,
85 sizeof(struct gic_v3_softc), gic_v3_driver);
87 static devclass_t gic_v3_fdt_devclass;
89 EARLY_DRIVER_MODULE(gic_v3, simplebus, gic_v3_fdt_driver, gic_v3_fdt_devclass,
90 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
91 EARLY_DRIVER_MODULE(gic_v3, ofwbus, gic_v3_fdt_driver, gic_v3_fdt_devclass,
92 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
95 * Helper functions declarations.
97 static int gic_v3_ofw_bus_attach(device_t);
103 gic_v3_fdt_probe(device_t dev)
106 if (!ofw_bus_status_okay(dev))
109 if (!ofw_bus_is_compatible(dev, "arm,gic-v3"))
112 device_set_desc(dev, GIC_V3_DEVSTR);
113 return (BUS_PROBE_DEFAULT);
117 gic_v3_fdt_attach(device_t dev)
119 struct gic_v3_softc *sc;
120 pcell_t redist_regions;
124 sc = device_get_softc(dev);
128 * Recover number of the Re-Distributor regions.
130 if (OF_getencprop(ofw_bus_get_node(dev), "#redistributor-regions",
131 &redist_regions, sizeof(redist_regions)) <= 0)
132 sc->gic_redists.nregions = 1;
134 sc->gic_redists.nregions = redist_regions;
136 err = gic_v3_attach(dev);
140 xref = OF_xref_from_node(ofw_bus_get_node(dev));
141 sc->gic_pic = intr_pic_register(dev, xref);
142 if (sc->gic_pic == NULL) {
143 device_printf(dev, "could not register PIC\n");
149 OF_device_register_xref(xref, dev);
151 if (intr_pic_claim_root(dev, xref, arm_gic_v3_intr, sc,
152 GIC_LAST_SGI - GIC_FIRST_SGI + 1) != 0) {
158 * Try to register ITS to this GIC.
159 * GIC will act as a bus in that case.
160 * Failure here will not affect main GIC functionality.
162 if (gic_v3_ofw_bus_attach(dev) != 0) {
165 "Failed to attach ITS to this GIC\n");
169 if (device_get_children(dev, &sc->gic_children, &sc->gic_nchildren) != 0)
170 sc->gic_nchildren = 0;
177 "Failed to attach. Error %d\n", err);
179 /* Failure so free resources */
185 /* OFW bus interface */
186 struct gic_v3_ofw_devinfo {
187 struct ofw_bus_devinfo di_dinfo;
188 struct resource_list di_rl;
192 gic_v3_fdt_print_child(device_t bus, device_t child)
194 struct gic_v3_ofw_devinfo *di = device_get_ivars(child);
195 struct resource_list *rl = &di->di_rl;
198 retval += bus_print_child_header(bus, child);
199 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
200 retval += bus_print_child_footer(bus, child);
205 static const struct ofw_bus_devinfo *
206 gic_v3_ofw_get_devinfo(device_t bus __unused, device_t child)
208 struct gic_v3_ofw_devinfo *di;
210 di = device_get_ivars(child);
211 return (&di->di_dinfo);
214 static struct resource *
215 gic_v3_ofw_bus_alloc_res(device_t bus, device_t child, int type, int *rid,
216 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
218 struct gic_v3_ofw_devinfo *di;
219 struct resource_list_entry *rle;
222 if (RMAN_IS_DEFAULT_RANGE(start, end)) {
223 if ((di = device_get_ivars(child)) == NULL)
225 if (type != SYS_RES_MEMORY)
228 /* Find defaults for this rid */
229 rle = resource_list_find(&di->di_rl, type, *rid);
238 * XXX: No ranges remap!
239 * Absolute address is expected.
241 if (ofw_bus_has_prop(bus, "ranges")) {
242 ranges_len = OF_getproplen(ofw_bus_get_node(bus), "ranges");
243 if (ranges_len != 0) {
246 "Ranges remap not supported\n");
251 return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
255 /* Helper functions */
258 * Bus capability support for GICv3.
259 * Collects and configures device informations and finally
260 * adds ITS device as a child of GICv3 in Newbus hierarchy.
263 gic_v3_ofw_bus_attach(device_t dev)
265 struct gic_v3_ofw_devinfo *di;
267 phandle_t parent, node;
268 pcell_t addr_cells, size_cells;
270 parent = ofw_bus_get_node(dev);
273 OF_getencprop(parent, "#address-cells", &addr_cells,
276 OF_getencprop(parent, "#size-cells", &size_cells,
278 /* Iterate through all GIC subordinates */
279 for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
280 /* Allocate and populate devinfo. */
281 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
282 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node)) {
285 "Could not set up devinfo for ITS\n");
291 /* Initialize and populate resource list. */
292 resource_list_init(&di->di_rl);
293 ofw_bus_reg_to_rl(dev, node, addr_cells, size_cells,
296 /* Should not have any interrupts, so don't add any */
298 /* Add newbus device for this FDT node */
299 child = device_add_child(dev, NULL, -1);
303 "Could not add child: %s\n",
304 di->di_dinfo.obd_name);
306 resource_list_free(&di->di_rl);
307 ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
312 device_set_ivars(child, di);
316 return (bus_generic_attach(dev));