2 * Copyright (C) 2003,2004
3 * Hidetoshi Shimokawa. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
16 * This product includes software developed by Hidetoshi Shimokawa.
18 * 4. Neither the name of the author nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include <sys/param.h>
40 #include <sys/kernel.h>
41 #include <sys/module.h>
42 #include <sys/systm.h>
43 #include <sys/types.h>
46 #include <sys/consio.h>
48 #include <sys/malloc.h>
51 #include <sys/ucred.h>
53 #include <machine/bus.h>
55 #include <dev/dcons/dcons.h>
56 #include <dev/dcons/dcons_os.h>
59 #include <sys/reboot.h>
61 #include <sys/sysctl.h>
64 #include <vm/vm_param.h>
67 #include "opt_dcons.h"
74 #define DCONS_POLL_HZ 25
77 #ifndef DCONS_BUF_SIZE
78 #define DCONS_BUF_SIZE (16*1024)
81 #ifndef DCONS_FORCE_CONSOLE
82 #define DCONS_FORCE_CONSOLE 0 /* Mostly for FreeBSD-4/DragonFly */
86 static char bssbuf[DCONS_BUF_SIZE]; /* buf in bss */
90 static struct dcons_global dg;
91 struct dcons_global *dcons_conf;
92 static int poll_hz = DCONS_POLL_HZ;
94 static struct dcons_softc sc[DCONS_NPORT];
96 static SYSCTL_NODE(_kern, OID_AUTO, dcons, CTLFLAG_RD, 0, "Dumb Console");
97 SYSCTL_INT(_kern_dcons, OID_AUTO, poll_hz, CTLFLAG_RW, &poll_hz, 0,
98 "dcons polling rate");
100 static int drv_init = 0;
101 static struct callout dcons_callout;
102 struct dcons_buf *dcons_buf; /* for local dconschat */
104 static void dcons_timeout(void *);
105 static int dcons_drv_init(int);
107 static cn_probe_t dcons_cnprobe;
108 static cn_init_t dcons_cninit;
109 static cn_term_t dcons_cnterm;
110 static cn_getc_t dcons_cngetc;
111 static cn_putc_t dcons_cnputc;
112 static cn_grab_t dcons_cngrab;
113 static cn_ungrab_t dcons_cnungrab;
115 CONSOLE_DRIVER(dcons);
118 static gdb_probe_f dcons_dbg_probe;
119 static gdb_init_f dcons_dbg_init;
120 static gdb_term_f dcons_dbg_term;
121 static gdb_getc_f dcons_dbg_getc;
122 static gdb_putc_f dcons_dbg_putc;
124 GDB_DBGPORT(dcons, dcons_dbg_probe, dcons_dbg_init, dcons_dbg_term,
125 dcons_dbg_getc, dcons_dbg_putc);
127 extern struct gdb_dbgport *gdb_cur;
130 static tsw_outwakeup_t dcons_outwakeup;
132 static struct ttydevsw dcons_ttydevsw = {
133 .tsw_flags = TF_NOPREFIX,
134 .tsw_outwakeup = dcons_outwakeup,
137 #if (defined(GDB) || defined(DDB))
139 dcons_check_break(struct dcons_softc *dc, int c)
146 if ((dc->flags & DC_GDB) != 0 && gdb_cur == &dcons_gdb_dbgport)
147 kdb_alt_break_gdb(c, &dc->brk_state);
150 kdb_alt_break(c, &dc->brk_state);
155 #define dcons_check_break(dc, c) (c)
159 dcons_os_checkc_nopoll(struct dcons_softc *dc)
163 if (dg.dma_tag != NULL)
164 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_POSTREAD);
166 c = dcons_check_break(dc, dcons_checkc(dc));
168 if (dg.dma_tag != NULL)
169 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_PREREAD);
175 dcons_os_checkc(struct dcons_softc *dc)
177 EVENTHANDLER_INVOKE(dcons_poll, 0);
178 return (dcons_os_checkc_nopoll(dc));
182 dcons_os_putc(struct dcons_softc *dc, int c)
184 if (dg.dma_tag != NULL)
185 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_POSTWRITE);
189 if (dg.dma_tag != NULL)
190 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_PREWRITE);
194 dcons_outwakeup(struct tty *tp)
196 struct dcons_softc *dc;
201 while (ttydisc_getc(tp, &ch, sizeof ch) != 0)
202 dcons_os_putc(dc, ch);
206 dcons_timeout(void *v)
209 struct dcons_softc *dc;
212 for (i = 0; i < DCONS_NPORT; i ++) {
217 while ((c = dcons_os_checkc_nopoll(dc)) != -1)
218 ttydisc_rint(tp, c, 0);
219 ttydisc_rint_done(tp);
222 polltime = hz / poll_hz;
225 callout_reset(&dcons_callout, polltime, dcons_timeout, tp);
229 dcons_cnprobe(struct consdev *cp)
231 sprintf(cp->cn_name, "dcons");
232 #if DCONS_FORCE_CONSOLE
233 cp->cn_pri = CN_REMOTE;
235 cp->cn_pri = CN_NORMAL;
240 dcons_cninit(struct consdev *cp)
243 cp->cn_arg = (void *)&sc[DCONS_CON]; /* share port0 with unit0 */
247 dcons_cnterm(struct consdev *cp)
252 dcons_cngrab(struct consdev *cp)
257 dcons_cnungrab(struct consdev *cp)
262 dcons_cngetc(struct consdev *cp)
264 struct dcons_softc *dc = (struct dcons_softc *)cp->cn_arg;
265 return (dcons_os_checkc(dc));
269 dcons_cnputc(struct consdev *cp, int c)
271 struct dcons_softc *dc = (struct dcons_softc *)cp->cn_arg;
272 dcons_os_putc(dc, c);
276 dcons_drv_init(int stage)
278 #if defined(__i386__) || defined(__amd64__)
287 bzero(&dg, sizeof(dg));
289 dg.cdev = &dcons_consdev;
291 dg.size = DCONS_BUF_SIZE;
293 #if defined(__i386__) || defined(__amd64__)
294 if (getenv_quad("dcons.addr", &addr) > 0 &&
295 getenv_quad("dcons.size", &size) > 0) {
299 * Allow read/write access to dcons buffer.
301 for (pa = trunc_page(addr); pa < addr + size; pa += PAGE_SIZE)
302 *vtopte(KERNBASE + pa) |= PG_RW;
306 dg.buf = (struct dcons_buf *)(vm_offset_t)(KERNBASE + addr);
308 if (dcons_load_buffer(dg.buf, dg.size, sc) < 0)
316 if (stage == 0) { /* XXX or cold */
318 * DCONS_FORCE_CONSOLE == 1 and statically linked.
319 * called from cninit(). can't use contigmalloc yet .
321 dg.buf = (struct dcons_buf *) bssbuf;
322 dcons_init(dg.buf, dg.size, sc);
327 * DCONS_FORCE_CONSOLE == 0 or kernel module case.
328 * if the module is loaded after boot,
329 * bssbuf could be non-continuous.
331 dg.buf = (struct dcons_buf *) contigmalloc(dg.size,
332 M_DEVBUF, 0, 0x10000, 0xffffffff, PAGE_SIZE, 0ul);
335 dcons_init(dg.buf, dg.size, sc);
348 dcons_attach_port(int port, char *name, int flags)
350 struct dcons_softc *dc;
354 tp = tty_alloc(&dcons_ttydevsw, dc);
357 tty_init_console(tp, 0);
358 tty_makedev(tp, NULL, "%s", name);
367 dcons_attach_port(DCONS_CON, "dcons", 0);
368 dcons_attach_port(DCONS_GDB, "dgdb", DC_GDB);
369 callout_init(&dcons_callout, CALLOUT_MPSAFE);
370 polltime = hz / poll_hz;
373 callout_reset(&dcons_callout, polltime, dcons_timeout, NULL);
378 dcons_detach(int port)
381 struct dcons_softc *dc;
393 dcons_modevent(module_t mode, int type, void *data)
399 ret = dcons_drv_init(1);
403 dcons_cnprobe(&dcons_consdev);
404 dcons_cninit(&dcons_consdev);
405 cnadd(&dcons_consdev);
409 printf("dcons: unload\n");
411 callout_stop(&dcons_callout);
412 cnremove(&dcons_consdev);
413 dcons_detach(DCONS_CON);
414 dcons_detach(DCONS_GDB);
417 contigfree(dg.buf, DCONS_BUF_SIZE, M_DEVBUF);
422 #if 0 /* Keep connection after halt */
434 /* Debugger interface */
437 dcons_os_getc(struct dcons_softc *dc)
441 while ((c = dcons_os_checkc(dc)) == -1);
447 dcons_dbg_probe(void)
451 if (getenv_int("dcons_gdb", &dcons_gdb) == 0)
467 dcons_dbg_putc(int c)
469 struct dcons_softc *dc = &sc[DCONS_GDB];
470 dcons_os_putc(dc, c);
476 struct dcons_softc *dc = &sc[DCONS_GDB];
477 return (dcons_os_getc(dc));
481 DEV_MODULE(dcons, dcons_modevent, NULL);
482 MODULE_VERSION(dcons, DCONS_VERSION);