source: rtems-libbsd/rtemsbsd/src/rtems-bsd-nexus.c @ 59f69ea

4.115-freebsd-12freebsd-9.3
Last change on this file since 59f69ea was 59f69ea, checked in by Jennifer Averett <jennifer.averett@…>, on Jul 11, 2012 at 5:48:58 PM

Some cleanup to allow build for multiple architectures.

  • Property mode set to 100644
File size: 11.5 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup rtems_bsd_rtems
5 *
6 * @brief TODO.
7 */
8
9/*
10 * Copyright (c) 2009, 2010 embedded brains GmbH.  All rights reserved.
11 *
12 *  embedded brains GmbH
13 *  Obere Lagerstr. 30
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 <freebsd/machine/rtems-bsd-config.h>
41#include <freebsd/machine/rtems-bsd-sysinit.h>
42
43#include <freebsd/sys/param.h>
44#include <freebsd/sys/types.h>
45#include <freebsd/sys/systm.h>
46#include <freebsd/sys/bus.h>
47#include <freebsd/sys/kernel.h>
48#include <freebsd/sys/module.h>
49#include <freebsd/sys/rman.h>
50#include <freebsd/sys/malloc.h>
51
52#include <bsp.h>
53#include <freebsd/machine/rtems-bsd-devicet.h>
54#include <bsp/irq.h>
55#include <rtems/irq.h>
56#include <freebsd/machine/bus.h>
57
58/* XXX Note:  These defines should be moved. */
59#if defined(__i386__)
60  #define       BUS_SPACE_IO    I386_BUS_SPACE_IO
61  #define       BUS_SPACE_MEM   I386_BUS_SPACE_MEM
62#elif defined(__amd64__)
63  #define       BUS_SPACE_IO    AMD64_BUS_SPACE_IO
64  #define       BUS_SPACE_MEM   AMD64_BUS_SPACE_MEM
65#else
66  #warning "Bus space information not implemented for this architecture!!"
67  #warning "Defaulting Bus space information!!"
68  #define       BUS_SPACE_IO    0       
69  #define       BUS_SPACE_MEM   1
70#endif
71
72/* XXX - Just a guess */
73#define NUM_IO_INTS   30
74
75#define DEVTONX(dev)    ((struct nexus_device *)device_get_ivars(dev))
76
77static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
78struct rman irq_rman, drq_rman, port_rman, mem_rman;
79struct nexus_device {
80        struct resource_list    nx_resources;
81};
82
83void
84nexus_init_resources(void)
85{
86        int irq;
87
88        /*
89         * XXX working notes:
90         *
91         * - IRQ resource creation should be moved to the PIC/APIC driver.
92         * - DRQ resource creation should be moved to the DMAC driver.
93         * - The above should be sorted to probe earlier than any child busses.
94         *
95         * - Leave I/O and memory creation here, as child probes may need them.
96         *   (especially eg. ACPI)
97         */
98
99        /*
100         * IRQ's are on the mainboard on old systems, but on the ISA part
101         * of PCI->ISA bridges.  There would be multiple sets of IRQs on
102         * multi-ISA-bus systems.  PCI interrupts are routed to the ISA
103         * component, so in a way, PCI can be a partial child of an ISA bus(!).
104         * APIC interrupts are global though.
105         */
106        irq_rman.rm_start = 0;
107        irq_rman.rm_type = RMAN_ARRAY;
108        irq_rman.rm_descr = "Interrupt request lines";
109        irq_rman.rm_end = NUM_IO_INTS - 1;
110        if (rman_init(&irq_rman))
111                panic("nexus_init_resources irq_rman");
112        /*
113         * We search for regions of existing IRQs and add those to the IRQ
114         * resource manager.
115         */
116        for (irq = 0; irq < NUM_IO_INTS; irq++)
117          if (rman_manage_region(&irq_rman, irq, irq) != 0)
118            panic("nexus_init_resources irq_rmand");
119 
120        /*
121         * ISA DMA on PCI systems is implemented in the ISA part of each
122         * PCI->ISA bridge and the channels can be duplicated if there are
123         * multiple bridges.  (eg: laptops with docking stations)
124         */
125        drq_rman.rm_start = 0;
126#ifdef PC98
127        drq_rman.rm_end = 3;
128#else
129        drq_rman.rm_end = 7;
130#endif
131        drq_rman.rm_type = RMAN_ARRAY;
132        drq_rman.rm_descr = "DMA request lines";
133        /* XXX drq 0 not available on some machines */
134        if (rman_init(&drq_rman)
135            || rman_manage_region(&drq_rman,
136                                  drq_rman.rm_start, drq_rman.rm_end))
137                panic("nexus_init_resources drq_rman");
138
139        /*
140         * However, IO ports and Memory truely are global at this level,
141         * as are APIC interrupts (however many IO APICS there turn out
142         * to be on large systems..)
143         */
144        port_rman.rm_start = 0;
145        port_rman.rm_end = 0xffff;
146        port_rman.rm_type = RMAN_ARRAY;
147        port_rman.rm_descr = "I/O ports";
148        if (rman_init(&port_rman)
149            || rman_manage_region(&port_rman, 0, 0xffff))
150                panic("nexus_init_resources port_rman");
151
152        mem_rman.rm_start = 0;
153        mem_rman.rm_end = ~0u;
154        mem_rman.rm_type = RMAN_ARRAY;
155        mem_rman.rm_descr = "I/O memory addresses";
156        if (rman_init(&mem_rman)
157            || rman_manage_region(&mem_rman, 0, ~0))
158                panic("nexus_init_resources mem_rman");
159}
160
161static int
162nexus_attach(device_t dev)
163{
164
165        nexus_init_resources();
166        bus_generic_probe(dev);
167
168        /*
169         * Explicitly add the legacy0 device here.  Other platform
170         * types (such as ACPI), use their own nexus(4) subclass
171         * driver to override this routine and add their own root bus.
172         */
173        if (BUS_ADD_CHILD(dev, 10, "legacy", 0) == NULL)
174                panic("legacy: could not attach");
175        bus_generic_attach(dev);
176        return 0;
177}
178
179static int
180nexus_probe(device_t dev)
181{
182        size_t unit = 0;
183#if 0
184        /* FIXME */
185        for (unit = 0; _bsd_nexus_devices [unit] != NULL; ++unit) {
186                device_add_child(dev, _bsd_nexus_devices [unit], unit);
187        }
188#endif
189        device_set_desc(dev, "RTEMS Nexus device");
190
191        return (0);
192}
193static device_t
194nexus_add_child(device_t bus, u_int order, const char *name, int unit)
195{
196        device_t                child;
197        struct nexus_device     *ndev;
198
199        ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
200        if (!ndev)
201                return(0);
202        resource_list_init(&ndev->nx_resources);
203
204        child = device_add_child_ordered(bus, order, name, unit);
205
206        /* should we free this in nexus_child_detached? */
207        device_set_ivars(child, ndev);
208
209        return(child);
210}
211
212/*
213 * Allocate a resource on behalf of child.  NB: child is usually going to be a
214 * child of one of our descendants, not a direct child of nexus0.
215 * (Exceptions include npx.)
216 */
217static struct resource *
218nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
219                     u_long start, u_long end, u_long count, u_int flags)
220{
221        struct nexus_device *ndev = DEVTONX(child);
222        struct  resource *rv;
223        struct resource_list_entry *rle;
224        struct  rman *rm;
225        int needactivate = flags & RF_ACTIVE;
226
227        /*
228         * If this is an allocation of the "default" range for a given RID, and
229         * we know what the resources for this device are (ie. they aren't maintained
230         * by a child bus), then work out the start/end values.
231         */
232        if ((start == 0UL) && (end == ~0UL) && (count == 1)) {
233                if (ndev == NULL)
234                        return(NULL);
235                rle = resource_list_find(&ndev->nx_resources, type, *rid);
236                if (rle == NULL)
237                        return(NULL);
238                start = rle->start;
239                end = rle->end;
240                count = rle->count;
241        }
242
243        flags &= ~RF_ACTIVE;
244
245        switch (type) {
246        case SYS_RES_IRQ:
247                rm = &irq_rman;
248                break;
249
250        case SYS_RES_DRQ:
251                rm = &drq_rman;
252                break;
253
254        case SYS_RES_IOPORT:
255                rm = &port_rman;
256                break;
257
258        case SYS_RES_MEMORY:
259                rm = &mem_rman;
260                break;
261
262        default:
263                return 0;
264        }
265
266        rv = rman_reserve_resource(rm, start, end, count, flags, child);
267        if (rv == 0)
268                return 0;
269        rman_set_rid(rv, *rid);
270
271        if (needactivate) {
272                if (bus_activate_resource(child, type, *rid, rv)) {
273                        rman_release_resource(rv);
274                        return 0;
275                }
276        }
277
278        return rv;
279}
280
281static int
282nexus_activate_resource(device_t bus, device_t child, int type, int rid,
283                        struct resource *r)
284{
285#ifdef PC98
286        bus_space_handle_t bh;
287        int error;
288#endif
289        void *vaddr;
290
291        /*
292         * If this is a memory resource, map it into the kernel.
293         */
294        switch (type) {
295        case SYS_RES_IOPORT:
296#ifdef PC98
297                error = i386_bus_space_handle_alloc(I386_BUS_SPACE_IO,
298                    rman_get_start(r), rman_get_size(r), &bh);
299                if (error)
300                        return (error);
301                rman_set_bushandle(r, bh);
302#else
303                rman_set_bushandle(r, rman_get_start(r));
304#endif
305                rman_set_bustag(r, BUS_SPACE_IO);
306                break;
307        case SYS_RES_MEMORY:
308#ifdef PC98
309                error = i386_bus_space_handle_alloc(I386_BUS_SPACE_MEM,
310                    rman_get_start(r), rman_get_size(r), &bh);
311                if (error)
312                        return (error);
313#endif
314                rman_set_bustag(r, BUS_SPACE_MEM);
315#ifdef PC98
316                /* PC-98: the type of bus_space_handle_t is the structure. */
317                bh->bsh_base = (bus_addr_t) vaddr;
318                rman_set_bushandle(r, bh);
319#else
320                /* IBM-PC: the type of bus_space_handle_t is u_int */
321                rman_set_bushandle(r, (bus_space_handle_t) vaddr);
322#endif
323        }
324        return (rman_activate_resource(r));
325}
326
327static int
328nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
329                          struct resource *r)
330{
331
332#ifdef PC98
333        if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
334                bus_space_handle_t bh;
335
336                bh = rman_get_bushandle(r);
337                i386_bus_space_handle_free(rman_get_bustag(r), bh, bh->bsh_sz);
338        }
339#endif
340        return (rman_deactivate_resource(r));
341}
342
343static int
344nexus_release_resource(device_t bus, device_t child, int type, int rid,
345                       struct resource *r)
346{
347        if (rman_get_flags(r) & RF_ACTIVE) {
348                int error = bus_deactivate_resource(child, type, rid, r);
349                if (error)
350                        return error;
351        }
352        return (rman_release_resource(r));
353}
354
355static void noop(const rtems_irq_connect_data *unused) {};
356static int  noop1(const rtems_irq_connect_data *unused) { return 0;};
357
358static int
359bspExtInstallSharedISR(int irqLine, void (*isr)(void *), void * uarg, int flags)
360{
361  return rtems_interrupt_handler_install(
362    irqLine, 
363    "BSD Interrupt", 
364    RTEMS_INTERRUPT_SHARED, 
365    isr, 
366    uarg
367  );
368}
369
370int
371intr_add_handler(const char *name, int vector, driver_filter_t filter,
372    driver_intr_t handler, void *arg, enum intr_type flags, void **cookiep)
373{
374  int  rval;
375 
376  rval = bspExtInstallSharedISR(vector, handler, arg, 0);
377  return rval;
378}
379
380static int
381nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
382                 int flags, driver_filter_t filter, void (*ihand)(void *),
383                 void *arg, void **cookiep)
384{
385        int             error;
386
387        /* somebody tried to setup an irq that failed to allocate! */
388        if (irq == NULL)
389                panic("nexus_setup_intr: NULL irq resource!");
390
391        *cookiep = 0;
392        if ((rman_get_flags(irq) & RF_SHAREABLE) == 0)
393                flags |= INTR_EXCL;
394
395        /*
396         * We depend here on rman_activate_resource() being idempotent.
397         */
398        error = rman_activate_resource(irq);
399        if (error)
400                return (error);
401
402        error = intr_add_handler(device_get_nameunit(child),
403            rman_get_start(irq), filter, ihand, arg, flags, cookiep);
404
405        return (error);
406}
407
408
409static device_method_t nexus_methods [] = {
410        /* Device interface */
411        DEVMETHOD(device_probe, nexus_probe),
412        DEVMETHOD(device_attach, nexus_attach),
413        DEVMETHOD(device_detach, bus_generic_detach),
414        DEVMETHOD(device_shutdown, bus_generic_shutdown),
415        DEVMETHOD(device_suspend, bus_generic_suspend),
416        DEVMETHOD(device_resume, bus_generic_resume),
417
418        /* Bus interface */
419        DEVMETHOD(bus_print_child, bus_generic_print_child),
420        DEVMETHOD(bus_add_child,        nexus_add_child),
421        DEVMETHOD(bus_alloc_resource,   nexus_alloc_resource),
422        DEVMETHOD(bus_release_resource, nexus_release_resource),
423        DEVMETHOD(bus_activate_resource, nexus_activate_resource),
424        DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
425        DEVMETHOD(bus_setup_intr,       nexus_setup_intr),
426
427        { 0, 0 }
428};
429
430static driver_t nexus_driver = {
431        .name = "nexus",
432        .methods = nexus_methods,
433        .size = 0
434};
435
436static devclass_t nexus_devclass;
437
438DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
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