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_POLL_IDLE
78 #define DCONS_POLL_IDLE 256
81 #ifndef DCONS_BUF_SIZE
82 #define DCONS_BUF_SIZE (16*1024)
85 #ifndef DCONS_FORCE_CONSOLE
86 #define DCONS_FORCE_CONSOLE 0 /* Mostly for FreeBSD-4/DragonFly */
90 static char bssbuf[DCONS_BUF_SIZE]; /* buf in bss */
94 static struct dcons_global dg;
95 struct dcons_global *dcons_conf;
96 static int poll_hz = DCONS_POLL_HZ;
97 static u_int poll_idle = DCONS_POLL_HZ * DCONS_POLL_IDLE;
99 static struct dcons_softc sc[DCONS_NPORT];
101 static SYSCTL_NODE(_kern, OID_AUTO, dcons, CTLFLAG_RD, 0, "Dumb Console");
102 SYSCTL_INT(_kern_dcons, OID_AUTO, poll_hz, CTLFLAG_RW, &poll_hz, 0,
103 "dcons polling rate");
105 static int drv_init = 0;
106 static struct callout dcons_callout;
107 struct dcons_buf *dcons_buf; /* for local dconschat */
109 static void dcons_timeout(void *);
110 static int dcons_drv_init(int);
112 static cn_probe_t dcons_cnprobe;
113 static cn_init_t dcons_cninit;
114 static cn_term_t dcons_cnterm;
115 static cn_getc_t dcons_cngetc;
116 static cn_putc_t dcons_cnputc;
117 static cn_grab_t dcons_cngrab;
118 static cn_ungrab_t dcons_cnungrab;
120 CONSOLE_DRIVER(dcons);
123 static gdb_probe_f dcons_dbg_probe;
124 static gdb_init_f dcons_dbg_init;
125 static gdb_term_f dcons_dbg_term;
126 static gdb_getc_f dcons_dbg_getc;
127 static gdb_putc_f dcons_dbg_putc;
129 GDB_DBGPORT(dcons, dcons_dbg_probe, dcons_dbg_init, dcons_dbg_term,
130 dcons_dbg_getc, dcons_dbg_putc);
132 extern struct gdb_dbgport *gdb_cur;
135 static tsw_outwakeup_t dcons_outwakeup;
137 static struct ttydevsw dcons_ttydevsw = {
138 .tsw_flags = TF_NOPREFIX,
139 .tsw_outwakeup = dcons_outwakeup,
142 #if (defined(GDB) || defined(DDB))
144 dcons_check_break(struct dcons_softc *dc, int c)
151 if ((dc->flags & DC_GDB) != 0 && gdb_cur == &dcons_gdb_dbgport)
152 kdb_alt_break_gdb(c, &dc->brk_state);
155 kdb_alt_break(c, &dc->brk_state);
160 #define dcons_check_break(dc, c) (c)
164 dcons_os_checkc_nopoll(struct dcons_softc *dc)
168 if (dg.dma_tag != NULL)
169 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_POSTREAD);
171 c = dcons_check_break(dc, dcons_checkc(dc));
173 if (dg.dma_tag != NULL)
174 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_PREREAD);
180 dcons_os_checkc(struct dcons_softc *dc)
182 EVENTHANDLER_INVOKE(dcons_poll, 0);
183 return (dcons_os_checkc_nopoll(dc));
187 dcons_os_putc(struct dcons_softc *dc, int c)
189 if (dg.dma_tag != NULL)
190 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_POSTWRITE);
194 if (dg.dma_tag != NULL)
195 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_PREWRITE);
199 dcons_outwakeup(struct tty *tp)
201 struct dcons_softc *dc;
206 while (ttydisc_getc(tp, &ch, sizeof ch) != 0)
207 dcons_os_putc(dc, ch);
211 dcons_timeout(void *v)
214 struct dcons_softc *dc;
217 for (i = 0; i < DCONS_NPORT; i ++) {
222 while ((c = dcons_os_checkc_nopoll(dc)) != -1) {
223 ttydisc_rint(tp, c, 0);
226 ttydisc_rint_done(tp);
231 if (poll_idle <= (poll_hz * DCONS_POLL_IDLE))
233 callout_reset(&dcons_callout, polltime, dcons_timeout, tp);
237 dcons_cnprobe(struct consdev *cp)
239 sprintf(cp->cn_name, "dcons");
240 #if DCONS_FORCE_CONSOLE
241 cp->cn_pri = CN_REMOTE;
243 cp->cn_pri = CN_NORMAL;
248 dcons_cninit(struct consdev *cp)
251 cp->cn_arg = (void *)&sc[DCONS_CON]; /* share port0 with unit0 */
255 dcons_cnterm(struct consdev *cp)
260 dcons_cngrab(struct consdev *cp)
265 dcons_cnungrab(struct consdev *cp)
270 dcons_cngetc(struct consdev *cp)
272 struct dcons_softc *dc = (struct dcons_softc *)cp->cn_arg;
273 return (dcons_os_checkc(dc));
277 dcons_cnputc(struct consdev *cp, int c)
279 struct dcons_softc *dc = (struct dcons_softc *)cp->cn_arg;
280 dcons_os_putc(dc, c);
284 dcons_drv_init(int stage)
286 #if defined(__i386__) || defined(__amd64__)
295 bzero(&dg, sizeof(dg));
297 dg.cdev = &dcons_consdev;
299 dg.size = DCONS_BUF_SIZE;
301 #if defined(__i386__) || defined(__amd64__)
302 if (getenv_quad("dcons.addr", &addr) > 0 &&
303 getenv_quad("dcons.size", &size) > 0) {
307 * Allow read/write access to dcons buffer.
309 for (pa = trunc_page(addr); pa < addr + size; pa += PAGE_SIZE)
310 *vtopte(KERNBASE + pa) |= PG_RW;
314 dg.buf = (struct dcons_buf *)(vm_offset_t)(KERNBASE + addr);
316 if (dcons_load_buffer(dg.buf, dg.size, sc) < 0)
324 if (stage == 0) { /* XXX or cold */
326 * DCONS_FORCE_CONSOLE == 1 and statically linked.
327 * called from cninit(). can't use contigmalloc yet .
329 dg.buf = (struct dcons_buf *) bssbuf;
330 dcons_init(dg.buf, dg.size, sc);
335 * DCONS_FORCE_CONSOLE == 0 or kernel module case.
336 * if the module is loaded after boot,
337 * bssbuf could be non-continuous.
339 dg.buf = (struct dcons_buf *) contigmalloc(dg.size,
340 M_DEVBUF, 0, 0x10000, 0xffffffff, PAGE_SIZE, 0ul);
343 dcons_init(dg.buf, dg.size, sc);
356 dcons_attach_port(int port, char *name, int flags)
358 struct dcons_softc *dc;
362 tp = tty_alloc(&dcons_ttydevsw, dc);
365 tty_init_console(tp, 0);
366 tty_makedev(tp, NULL, "%s", name);
375 dcons_attach_port(DCONS_CON, "dcons", 0);
376 dcons_attach_port(DCONS_GDB, "dgdb", DC_GDB);
377 callout_init(&dcons_callout, 1);
378 polltime = hz / poll_hz;
379 callout_reset(&dcons_callout, polltime, dcons_timeout, NULL);
384 dcons_detach(int port)
387 struct dcons_softc *dc;
399 dcons_modevent(module_t mode, int type, void *data)
405 ret = dcons_drv_init(1);
409 dcons_cnprobe(&dcons_consdev);
410 dcons_cninit(&dcons_consdev);
411 cnadd(&dcons_consdev);
415 printf("dcons: unload\n");
417 callout_stop(&dcons_callout);
418 cnremove(&dcons_consdev);
419 dcons_detach(DCONS_CON);
420 dcons_detach(DCONS_GDB);
423 contigfree(dg.buf, DCONS_BUF_SIZE, M_DEVBUF);
428 #if 0 /* Keep connection after halt */
440 /* Debugger interface */
443 dcons_os_getc(struct dcons_softc *dc)
447 while ((c = dcons_os_checkc(dc)) == -1);
453 dcons_dbg_probe(void)
457 if (getenv_int("dcons_gdb", &dcons_gdb) == 0)
473 dcons_dbg_putc(int c)
475 struct dcons_softc *dc = &sc[DCONS_GDB];
476 dcons_os_putc(dc, c);
482 struct dcons_softc *dc = &sc[DCONS_GDB];
483 return (dcons_os_getc(dc));
487 DEV_MODULE(dcons, dcons_modevent, NULL);
488 MODULE_VERSION(dcons, DCONS_VERSION);