source: rtems-libbsd/rtemsbsd/rtems/rtems-bsd-nexus.c @ e58b898

55-freebsd-126-freebsd-12freebsd-9.3
Last change on this file since e58b898 was 00c8792, checked in by Sebastian Huber <sebastian.huber@…>, on 10/30/15 at 07:03:57

Initialize interrupt server early

This enables its use before the Nexus device exists.

  • Property mode set to 100644
File size: 8.3 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup rtems_bsd_rtems
5 *
6 * @brief TODO.
7 */
8
9/*
10 * Copyright (c) 2009-2015 embedded brains GmbH.  All rights reserved.
11 *
12 *  embedded brains GmbH
13 *  Dornierstr. 4
14 *  82178 Puchheim
15 *  Germany
16 *  <rtems@embedded-brains.de>
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 *    notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 *    notice, this list of conditions and the following disclaimer in the
25 *    documentation and/or other materials provided with the distribution.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40#include <machine/rtems-bsd-kernel-space.h>
41#include <machine/rtems-bsd-thread.h>
42
43#include <rtems/bsd/sys/param.h>
44#include <rtems/bsd/sys/types.h>
45#include <sys/systm.h>
46#include <sys/bus.h>
47#include <sys/kernel.h>
48#include <sys/module.h>
49#include <sys/rman.h>
50#include <sys/malloc.h>
51#include <machine/bus.h>
52
53#include <rtems/bsd/bsd.h>
54#include <rtems/irq-extension.h>
55
56/* #define DISABLE_INTERRUPT_EXTENSION */
57
58RTEMS_BSD_DECLARE_SET(nexus, rtems_bsd_device);
59
60RTEMS_BSD_DEFINE_SET(nexus, rtems_bsd_device);
61
62RTEMS_STATIC_ASSERT(SYS_RES_MEMORY == RTEMS_BSD_RES_MEMORY, RTEMS_BSD_RES_MEMORY);
63
64RTEMS_STATIC_ASSERT(SYS_RES_IRQ == RTEMS_BSD_RES_IRQ, RTEMS_BSD_RES_IRQ);
65
66static struct rman mem_rman;
67
68static struct rman irq_rman;
69
70#ifdef __i386__
71static struct rman port_rman;
72#endif
73
74#ifndef DISABLE_INTERRUPT_EXTENSION
75SYSINIT_REFERENCE(irqs);
76#endif
77
78static int
79nexus_probe(device_t dev)
80{
81        int err;
82        const rtems_bsd_device *nd;
83
84        device_set_desc(dev, "RTEMS Nexus device");
85
86        mem_rman.rm_start = 0;
87        mem_rman.rm_end = ~0UL;
88        mem_rman.rm_type = RMAN_ARRAY;
89        mem_rman.rm_descr = "I/O memory addresses";
90        err = rman_init(&mem_rman) != 0;
91        BSD_ASSERT(err == 0);
92        err = rman_manage_region(&mem_rman, mem_rman.rm_start, mem_rman.rm_end);
93        BSD_ASSERT(err == 0);
94
95        irq_rman.rm_start = 0;
96        irq_rman.rm_end = ~0UL;
97        irq_rman.rm_type = RMAN_ARRAY;
98        irq_rman.rm_descr = "Interrupt vectors";
99        err = rman_init(&irq_rman) != 0;
100        BSD_ASSERT(err == 0);
101        err = rman_manage_region(&irq_rman, irq_rman.rm_start, irq_rman.rm_end);
102        BSD_ASSERT(err == 0);
103
104#ifdef __i386__
105        port_rman.rm_start = 0;
106        port_rman.rm_end = 0xffff;
107        port_rman.rm_type = RMAN_ARRAY;
108        port_rman.rm_descr = "I/O ports";
109        err = rman_init(&port_rman) != 0;
110        BSD_ASSERT(err == 0);
111        err = rman_manage_region(&port_rman, port_rman.rm_start,
112            port_rman.rm_end);
113        BSD_ASSERT(err == 0);
114#endif
115
116        SET_FOREACH(nd, nexus) {
117                device_add_child(dev, nd->name, nd->unit);
118        }
119
120        return (0);
121}
122
123static bool
124nexus_get_start(const rtems_bsd_device *nd, int type, u_long *start)
125{
126        u_long sr = *start;
127        size_t i;
128
129        for (i = 0; i < nd->resource_count; ++i) {
130                const rtems_bsd_device_resource *dr = &nd->resources[i];
131
132                if (dr->type == type && dr->start_request == sr) {
133                        *start = dr->start_actual;
134
135                        return (true);
136                }
137        }
138
139        return (false);
140}
141
142static struct resource *
143nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
144    u_long start, u_long end, u_long count, u_int flags)
145{
146        struct resource *res = NULL;
147        struct rman *rm;
148        const rtems_bsd_device *nd;
149
150        switch (type) {
151        case SYS_RES_MEMORY:
152                rm = &mem_rman;
153                break;
154        case SYS_RES_IRQ:
155                rm = &irq_rman;
156                break;
157#ifdef __i386__
158        case SYS_RES_IOPORT:
159                rm = &port_rman;
160                break;
161#endif
162        default:
163                return (res);
164        }
165
166        SET_FOREACH(nd, nexus) {
167                if (strcmp(device_get_name(child), nd->name) == 0
168                    && device_get_unit(child) == nd->unit) {
169                        if (nexus_get_start(nd, type, &start)) {
170                                res = rman_reserve_resource(rm, start, end,
171                                    count, flags, child);
172                                if (res != NULL) {
173                                        rman_set_rid(res, *rid);
174                                        rman_set_bushandle(res,
175                                            rman_get_start(res));
176                                }
177                        };
178
179                        return (res);
180                }
181        }
182
183#ifdef __i386__
184        /*
185         * FIXME: This is a quick and dirty hack.  Simply reserve resources of
186         * this kind.  See also pci_reserve_map().
187         */
188        if (start + count - end <= 1UL) {
189                res = rman_reserve_resource(rm, start, end, count, flags,
190                    child);
191                if (res != NULL) {
192                        rman_set_rid(res, *rid);
193                        rman_set_bushandle(res, rman_get_start(res));
194                }
195        }
196#endif
197
198        return (res);
199}
200
201static int
202nexus_release_resource(device_t bus, device_t child, int type, int rid,
203    struct resource *res)
204{
205        return (rman_release_resource(res));
206}
207
208#ifdef __i386__
209static int
210nexus_activate_resource(device_t bus, device_t child, int type, int rid,
211    struct resource *res)
212{
213        switch (type) {
214        case SYS_RES_IOPORT:
215                rman_set_bustag(res, X86_BUS_SPACE_IO);
216                break;
217        case SYS_RES_MEMORY:
218                rman_set_bustag(res, X86_BUS_SPACE_MEM);
219                break;
220        }
221        return (rman_activate_resource(res));
222}
223
224static int
225nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
226    struct resource *res)
227{
228
229        return (rman_deactivate_resource(res));
230}
231#endif
232
233struct nexus_intr {
234        driver_filter_t *filt;
235        driver_intr_t *intr;
236        void *arg;
237};
238
239static void
240nexus_intr_with_filter(void *arg)
241{
242        struct nexus_intr *ni;
243        int status;
244
245        ni = arg;
246
247        status = (*ni->filt)(ni->arg);
248        if ((status & FILTER_SCHEDULE_THREAD) != 0) {
249                (*ni->intr)(ni->arg);
250        }
251}
252
253static int
254nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
255    driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep)
256{
257        int err;
258#ifndef DISABLE_INTERRUPT_EXTENSION
259        struct nexus_intr *ni;
260
261        ni = malloc(sizeof(*ni), M_TEMP, M_WAITOK);
262        if (ni != NULL) {
263                rtems_status_code sc;
264                rtems_interrupt_handler rh;
265                void *ra;
266
267                ni->filt = filt;
268                ni->intr = intr;
269                ni->arg = arg;
270
271                *cookiep = ni;
272
273                if (filt == NULL) {
274                        rh = intr;
275                        ra = arg;
276                } else {
277                        rh = nexus_intr_with_filter;
278                        ra = ni;
279                }
280
281                sc = rtems_interrupt_server_handler_install(RTEMS_ID_NONE,
282                    rman_get_start(res), device_get_nameunit(child),
283                    RTEMS_INTERRUPT_UNIQUE, rh, ra);
284                if (sc == RTEMS_SUCCESSFUL) {
285                        err = 0;
286                } else {
287                        free(ni, M_TEMP);
288
289                        err = EINVAL;
290                }
291        } else {
292                err = ENOMEM;
293        }
294#else
295        err = EINVAL;
296#endif
297
298        return (err);
299}
300
301static int
302nexus_teardown_intr(device_t dev, device_t child, struct resource *res,
303    void *cookie)
304{
305        int err;
306#ifndef DISABLE_INTERRUPT_EXTENSION
307        struct nexus_intr *ni;
308        rtems_status_code sc;
309        rtems_interrupt_handler rh;
310        void *ra;
311
312        ni = cookie;
313
314        if (ni->filt == NULL) {
315                rh = ni->intr;
316                ra = ni->arg;
317        } else {
318                rh = nexus_intr_with_filter;
319                ra = ni->arg;
320        }
321
322        sc = rtems_interrupt_server_handler_install(RTEMS_ID_NONE,
323            rman_get_start(res), device_get_nameunit(child),
324            RTEMS_INTERRUPT_UNIQUE, rh, ra);
325        err = sc == RTEMS_SUCCESSFUL ? 0 : EINVAL;
326#else
327        err = EINVAL;
328#endif
329
330        return (err);
331}
332
333static device_method_t nexus_methods[] = {
334        /* Device interface */
335        DEVMETHOD(device_probe, nexus_probe),
336        DEVMETHOD(device_attach, bus_generic_attach),
337        DEVMETHOD(device_detach, bus_generic_detach),
338        DEVMETHOD(device_shutdown, bus_generic_shutdown),
339        DEVMETHOD(device_suspend, bus_generic_suspend),
340        DEVMETHOD(device_resume, bus_generic_resume),
341
342        /* Bus interface */
343        DEVMETHOD(bus_print_child, bus_generic_print_child),
344        DEVMETHOD(bus_add_child, bus_generic_add_child),
345        DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
346        DEVMETHOD(bus_release_resource, nexus_release_resource),
347#ifdef __i386__
348        DEVMETHOD(bus_activate_resource, nexus_activate_resource),
349        DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
350#endif
351        DEVMETHOD(bus_setup_intr, nexus_setup_intr),
352        DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
353
354        { 0, 0 }
355};
356
357static driver_t nexus_driver = {
358        .name = "nexus",
359        .methods = nexus_methods,
360        .size = 0
361};
362
363static devclass_t nexus_devclass;
364
365DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
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