764 lines
16 KiB
C
764 lines
16 KiB
C
/*-
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* Copyright (C) 2003,2004
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* Hidetoshi Shimokawa. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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*
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* This product includes software developed by Hidetoshi Shimokawa.
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*
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* 4. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#if __FreeBSD_version >= 502122
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#include <sys/kdb.h>
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#include <gdb/gdb.h>
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#endif
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/conf.h>
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#include <sys/cons.h>
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#include <sys/consio.h>
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#include <sys/tty.h>
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#include <sys/malloc.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/ucred.h>
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#include <machine/bus.h>
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#ifdef __DragonFly__
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#include "dcons.h"
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#include "dcons_os.h"
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#else
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#include <dev/dcons/dcons.h>
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#include <dev/dcons/dcons_os.h>
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#endif
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#include <ddb/ddb.h>
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#include <sys/reboot.h>
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#include <sys/sysctl.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include "opt_comconsole.h"
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#include "opt_dcons.h"
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#include "opt_kdb.h"
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#include "opt_gdb.h"
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#include "opt_ddb.h"
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#ifndef DCONS_POLL_HZ
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#define DCONS_POLL_HZ 100
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#endif
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#ifndef DCONS_BUF_SIZE
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#define DCONS_BUF_SIZE (16*1024)
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#endif
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#ifndef DCONS_FORCE_CONSOLE
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#define DCONS_FORCE_CONSOLE 0 /* Mostly for FreeBSD-4/DragonFly */
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#endif
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#ifndef DCONS_FORCE_GDB
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#define DCONS_FORCE_GDB 1
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#endif
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#if __FreeBSD_version >= 500101
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#define CONS_NODEV 1
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#if __FreeBSD_version < 502122
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static struct consdev gdbconsdev;
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#endif
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#endif
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static d_open_t dcons_open;
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static d_close_t dcons_close;
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#if defined(__DragonFly__) || __FreeBSD_version < 500104
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static d_ioctl_t dcons_ioctl;
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#endif
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static struct cdevsw dcons_cdevsw = {
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#ifdef __DragonFly__
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#define CDEV_MAJOR 184
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"dcons", CDEV_MAJOR, D_TTY, NULL, 0,
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dcons_open, dcons_close, ttyread, ttywrite, dcons_ioctl,
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ttypoll, nommap, nostrategy, nodump, nopsize,
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#elif __FreeBSD_version >= 500104
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.d_version = D_VERSION,
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.d_open = dcons_open,
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.d_close = dcons_close,
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.d_name = "dcons",
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.d_flags = D_TTY | D_NEEDGIANT,
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#else
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#define CDEV_MAJOR 184
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/* open */ dcons_open,
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/* close */ dcons_close,
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/* read */ ttyread,
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/* write */ ttywrite,
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/* ioctl */ dcons_ioctl,
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/* poll */ ttypoll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "dcons",
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/* major */ CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ D_TTY,
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#endif
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};
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#ifndef KLD_MODULE
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static char bssbuf[DCONS_BUF_SIZE]; /* buf in bss */
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#endif
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/* global data */
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static struct dcons_global dg;
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struct dcons_global *dcons_conf;
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static int poll_hz = DCONS_POLL_HZ;
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static struct dcons_softc sc[DCONS_NPORT];
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SYSCTL_NODE(_kern, OID_AUTO, dcons, CTLFLAG_RD, 0, "Dumb Console");
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SYSCTL_INT(_kern_dcons, OID_AUTO, poll_hz, CTLFLAG_RW, &poll_hz, 0,
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"dcons polling rate");
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static int drv_init = 0;
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static struct callout dcons_callout;
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struct dcons_buf *dcons_buf; /* for local dconschat */
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#ifdef __DragonFly__
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#define DEV dev_t
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#define THREAD d_thread_t
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#elif __FreeBSD_version < 500000
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#define DEV dev_t
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#define THREAD struct proc
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#else
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#define DEV struct cdev *
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#define THREAD struct thread
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#endif
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static void dcons_tty_start(struct tty *);
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static int dcons_tty_param(struct tty *, struct termios *);
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static void dcons_timeout(void *);
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static int dcons_drv_init(int);
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static cn_probe_t dcons_cnprobe;
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static cn_init_t dcons_cninit;
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static cn_term_t dcons_cnterm;
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static cn_getc_t dcons_cngetc;
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static cn_putc_t dcons_cnputc;
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CONSOLE_DRIVER(dcons);
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#if defined(GDB) && (__FreeBSD_version >= 502122)
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static gdb_probe_f dcons_dbg_probe;
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static gdb_init_f dcons_dbg_init;
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static gdb_term_f dcons_dbg_term;
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static gdb_getc_f dcons_dbg_getc;
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static gdb_putc_f dcons_dbg_putc;
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GDB_DBGPORT(dcons, dcons_dbg_probe, dcons_dbg_init, dcons_dbg_term,
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dcons_dbg_getc, dcons_dbg_putc);
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extern struct gdb_dbgport *gdb_cur;
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#endif
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#if (defined(GDB) || defined(DDB)) && defined(ALT_BREAK_TO_DEBUGGER)
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static int
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dcons_check_break(struct dcons_softc *dc, int c)
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{
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if (c < 0)
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return (c);
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#if __FreeBSD_version >= 502122
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if (kdb_alt_break(c, &dc->brk_state)) {
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if ((dc->flags & DC_GDB) != 0) {
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#ifdef GDB
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if (gdb_cur == &dcons_gdb_dbgport) {
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kdb_dbbe_select("gdb");
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kdb_enter("Break sequence on dcons gdb port");
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}
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#endif
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} else
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kdb_enter("Break sequence on dcons console port");
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}
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#else
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switch (dc->brk_state) {
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case STATE1:
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if (c == KEY_TILDE)
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dc->brk_state = STATE2;
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else
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dc->brk_state = STATE0;
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break;
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case STATE2:
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dc->brk_state = STATE0;
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if (c == KEY_CTRLB) {
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#if DCONS_FORCE_GDB
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if (dc->flags & DC_GDB)
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boothowto |= RB_GDB;
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#endif
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breakpoint();
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}
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}
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if (c == KEY_CR)
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dc->brk_state = STATE1;
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#endif
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return (c);
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}
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#else
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#define dcons_check_break(dc, c) (c)
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#endif
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static int
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dcons_os_checkc_nopoll(struct dcons_softc *dc)
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{
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int c;
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if (dg.dma_tag != NULL)
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bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_POSTREAD);
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c = dcons_check_break(dc, dcons_checkc(dc));
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if (dg.dma_tag != NULL)
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bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_PREREAD);
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return (c);
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}
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static int
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dcons_os_checkc(struct dcons_softc *dc)
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{
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EVENTHANDLER_INVOKE(dcons_poll, 0);
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return (dcons_os_checkc_nopoll(dc));
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}
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#if defined(GDB) || !defined(CONS_NODEV)
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static int
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dcons_os_getc(struct dcons_softc *dc)
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{
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int c;
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while ((c = dcons_os_checkc(dc)) == -1);
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return (c & 0xff);
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}
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#endif
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static void
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dcons_os_putc(struct dcons_softc *dc, int c)
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{
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if (dg.dma_tag != NULL)
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bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_POSTWRITE);
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dcons_putc(dc, c);
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if (dg.dma_tag != NULL)
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bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_PREWRITE);
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}
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static int
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dcons_open(DEV dev, int flag, int mode, THREAD *td)
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{
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struct tty *tp;
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int unit, error, s;
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unit = minor(dev);
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if (unit != 0)
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return (ENXIO);
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tp = dev->si_tty;
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tp->t_oproc = dcons_tty_start;
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tp->t_param = dcons_tty_param;
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tp->t_stop = nottystop;
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tp->t_dev = dev;
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error = 0;
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s = spltty();
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if ((tp->t_state & TS_ISOPEN) == 0) {
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tp->t_state |= TS_CARR_ON;
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ttyconsolemode(tp, 0);
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} else if ((tp->t_state & TS_XCLUDE) &&
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priv_check(td, PRIV_TTY_EXCLUSIVE)) {
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splx(s);
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return (EBUSY);
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}
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splx(s);
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#if __FreeBSD_version < 502113
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error = (*linesw[tp->t_line].l_open)(dev, tp);
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#else
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error = ttyld_open(tp, dev);
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#endif
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return (error);
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}
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static int
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dcons_close(DEV dev, int flag, int mode, THREAD *td)
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{
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int unit;
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struct tty *tp;
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unit = minor(dev);
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if (unit != 0)
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return (ENXIO);
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tp = dev->si_tty;
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if (tp->t_state & TS_ISOPEN) {
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#if __FreeBSD_version < 502113
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(*linesw[tp->t_line].l_close)(tp, flag);
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ttyclose(tp);
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#else
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ttyld_close(tp, flag);
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tty_close(tp);
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#endif
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}
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return (0);
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}
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#if defined(__DragonFly__) || __FreeBSD_version < 500104
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static int
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dcons_ioctl(DEV dev, u_long cmd, caddr_t data, int flag, THREAD *td)
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{
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int unit;
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struct tty *tp;
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int error;
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unit = minor(dev);
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if (unit != 0)
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return (ENXIO);
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tp = dev->si_tty;
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error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td);
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if (error != ENOIOCTL)
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return (error);
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error = ttioctl(tp, cmd, data, flag);
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if (error != ENOIOCTL)
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return (error);
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return (ENOTTY);
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}
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#endif
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static int
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dcons_tty_param(struct tty *tp, struct termios *t)
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{
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tp->t_ispeed = t->c_ispeed;
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tp->t_ospeed = t->c_ospeed;
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tp->t_cflag = t->c_cflag;
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return 0;
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}
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static void
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dcons_tty_start(struct tty *tp)
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{
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struct dcons_softc *dc;
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int s;
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dc = (struct dcons_softc *)tp->t_dev->si_drv1;
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s = spltty();
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if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
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ttwwakeup(tp);
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return;
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}
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tp->t_state |= TS_BUSY;
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while (tp->t_outq.c_cc != 0)
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dcons_os_putc(dc, getc(&tp->t_outq));
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tp->t_state &= ~TS_BUSY;
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ttwwakeup(tp);
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splx(s);
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}
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static void
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dcons_timeout(void *v)
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{
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struct tty *tp;
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struct dcons_softc *dc;
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int i, c, polltime;
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for (i = 0; i < DCONS_NPORT; i ++) {
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dc = &sc[i];
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tp = ((DEV)dc->dev)->si_tty;
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while ((c = dcons_os_checkc_nopoll(dc)) != -1)
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if (tp->t_state & TS_ISOPEN)
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#if __FreeBSD_version < 502113
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(*linesw[tp->t_line].l_rint)(c, tp);
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#else
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ttyld_rint(tp, c);
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#endif
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}
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polltime = hz / poll_hz;
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if (polltime < 1)
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polltime = 1;
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callout_reset(&dcons_callout, polltime, dcons_timeout, tp);
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}
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static void
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dcons_cnprobe(struct consdev *cp)
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{
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#ifdef __DragonFly__
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cp->cn_dev = make_dev(&dcons_cdevsw, DCONS_CON,
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UID_ROOT, GID_WHEEL, 0600, "dcons");
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#elif __FreeBSD_version >= 501109
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sprintf(cp->cn_name, "dcons");
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#else
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cp->cn_dev = makedev(CDEV_MAJOR, DCONS_CON);
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#endif
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#if DCONS_FORCE_CONSOLE
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cp->cn_pri = CN_REMOTE;
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#else
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cp->cn_pri = CN_NORMAL;
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#endif
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}
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static void
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dcons_cninit(struct consdev *cp)
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{
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dcons_drv_init(0);
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#if CONS_NODEV
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cp->cn_arg
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#else
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cp->cn_dev->si_drv1
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#endif
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= (void *)&sc[DCONS_CON]; /* share port0 with unit0 */
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}
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static void
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dcons_cnterm(struct consdev *cp)
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{
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}
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#if CONS_NODEV
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static int
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dcons_cngetc(struct consdev *cp)
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{
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struct dcons_softc *dc = (struct dcons_softc *)cp->cn_arg;
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return (dcons_os_checkc(dc));
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}
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static void
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dcons_cnputc(struct consdev *cp, int c)
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{
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struct dcons_softc *dc = (struct dcons_softc *)cp->cn_arg;
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dcons_os_putc(dc, c);
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}
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#else
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static int
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dcons_cngetc(DEV dev)
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{
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struct dcons_softc *dc = (struct dcons_softc *)dev->si_drv1;
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return (dcons_os_getc(dc));
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}
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static int
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dcons_cncheckc(DEV dev)
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{
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struct dcons_softc *dc = (struct dcons_softc *)dev->si_drv1;
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return (dcons_os_checkc(dc));
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}
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static void
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dcons_cnputc(DEV dev, int c)
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{
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struct dcons_softc *dc = (struct dcons_softc *)dev->si_drv1;
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dcons_os_putc(dc, c);
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}
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#endif
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static int
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dcons_drv_init(int stage)
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{
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#if defined(__i386__) || defined(__amd64__)
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quad_t addr, size;
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#endif
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if (drv_init)
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return(drv_init);
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drv_init = -1;
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bzero(&dg, sizeof(dg));
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dcons_conf = &dg;
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dg.cdev = &dcons_consdev;
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dg.buf = NULL;
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dg.size = DCONS_BUF_SIZE;
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#if defined(__i386__) || defined(__amd64__)
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if (getenv_quad("dcons.addr", &addr) > 0 &&
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getenv_quad("dcons.size", &size) > 0) {
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#ifdef __i386__
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vm_paddr_t pa;
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/*
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|
* Allow read/write access to dcons buffer.
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*/
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for (pa = trunc_page(addr); pa < addr + size; pa += PAGE_SIZE)
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|
*vtopte(KERNBASE + pa) |= PG_RW;
|
|
invltlb();
|
|
#endif
|
|
/* XXX P to V */
|
|
dg.buf = (struct dcons_buf *)(vm_offset_t)(KERNBASE + addr);
|
|
dg.size = size;
|
|
if (dcons_load_buffer(dg.buf, dg.size, sc) < 0)
|
|
dg.buf = NULL;
|
|
}
|
|
#endif
|
|
if (dg.buf != NULL)
|
|
goto ok;
|
|
|
|
#ifndef KLD_MODULE
|
|
if (stage == 0) { /* XXX or cold */
|
|
/*
|
|
* DCONS_FORCE_CONSOLE == 1 and statically linked.
|
|
* called from cninit(). can't use contigmalloc yet .
|
|
*/
|
|
dg.buf = (struct dcons_buf *) bssbuf;
|
|
dcons_init(dg.buf, dg.size, sc);
|
|
} else
|
|
#endif
|
|
{
|
|
/*
|
|
* DCONS_FORCE_CONSOLE == 0 or kernel module case.
|
|
* if the module is loaded after boot,
|
|
* bssbuf could be non-continuous.
|
|
*/
|
|
dg.buf = (struct dcons_buf *) contigmalloc(dg.size,
|
|
M_DEVBUF, 0, 0x10000, 0xffffffff, PAGE_SIZE, 0ul);
|
|
dcons_init(dg.buf, dg.size, sc);
|
|
}
|
|
|
|
ok:
|
|
dcons_buf = dg.buf;
|
|
|
|
#if __FreeBSD_version < 502122
|
|
#if defined(DDB) && DCONS_FORCE_GDB
|
|
#if CONS_NODEV
|
|
gdbconsdev.cn_arg = (void *)&sc[DCONS_GDB];
|
|
#if __FreeBSD_version >= 501109
|
|
sprintf(gdbconsdev.cn_name, "dgdb");
|
|
#endif
|
|
gdb_arg = &gdbconsdev;
|
|
#elif defined(__DragonFly__)
|
|
gdbdev = make_dev(&dcons_cdevsw, DCONS_GDB,
|
|
UID_ROOT, GID_WHEEL, 0600, "dgdb");
|
|
#else
|
|
gdbdev = makedev(CDEV_MAJOR, DCONS_GDB);
|
|
#endif
|
|
gdb_getc = dcons_cngetc;
|
|
gdb_putc = dcons_cnputc;
|
|
#endif
|
|
#endif
|
|
drv_init = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
dcons_attach_port(int port, char *name, int flags)
|
|
{
|
|
struct dcons_softc *dc;
|
|
struct tty *tp;
|
|
DEV dev;
|
|
|
|
dc = &sc[port];
|
|
dc->flags = flags;
|
|
dev = make_dev(&dcons_cdevsw, port,
|
|
UID_ROOT, GID_WHEEL, 0600, name);
|
|
dc->dev = (void *)dev;
|
|
tp = ttyalloc();
|
|
|
|
dev->si_drv1 = (void *)dc;
|
|
dev->si_tty = tp;
|
|
|
|
tp->t_oproc = dcons_tty_start;
|
|
tp->t_param = dcons_tty_param;
|
|
tp->t_stop = nottystop;
|
|
tp->t_dev = dc->dev;
|
|
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
dcons_attach(void)
|
|
{
|
|
int polltime;
|
|
|
|
#ifdef __DragonFly__
|
|
cdevsw_add(&dcons_cdevsw, -1, 0);
|
|
#endif
|
|
dcons_attach_port(DCONS_CON, "dcons", 0);
|
|
dcons_attach_port(DCONS_GDB, "dgdb", DC_GDB);
|
|
#if __FreeBSD_version < 500000
|
|
callout_init(&dcons_callout);
|
|
#else
|
|
callout_init(&dcons_callout, 0);
|
|
#endif
|
|
polltime = hz / poll_hz;
|
|
if (polltime < 1)
|
|
polltime = 1;
|
|
callout_reset(&dcons_callout, polltime, dcons_timeout, NULL);
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
dcons_detach(int port)
|
|
{
|
|
struct tty *tp;
|
|
struct dcons_softc *dc;
|
|
|
|
dc = &sc[port];
|
|
|
|
tp = ((DEV)dc->dev)->si_tty;
|
|
|
|
if (tp->t_state & TS_ISOPEN) {
|
|
printf("dcons: still opened\n");
|
|
#if __FreeBSD_version < 502113
|
|
(*linesw[tp->t_line].l_close)(tp, 0);
|
|
tp->t_gen++;
|
|
ttyclose(tp);
|
|
ttwakeup(tp);
|
|
ttwwakeup(tp);
|
|
#else
|
|
ttyld_close(tp, 0);
|
|
tty_close(tp);
|
|
#endif
|
|
}
|
|
/* XXX
|
|
* must wait until all device are closed.
|
|
*/
|
|
#ifdef __DragonFly__
|
|
tsleep((void *)dc, 0, "dcodtc", hz/4);
|
|
#else
|
|
tsleep((void *)dc, PWAIT, "dcodtc", hz/4);
|
|
#endif
|
|
destroy_dev(dc->dev);
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
/* cnXXX works only for FreeBSD-5 */
|
|
static int
|
|
dcons_modevent(module_t mode, int type, void *data)
|
|
{
|
|
int err = 0, ret;
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
ret = dcons_drv_init(1);
|
|
dcons_attach();
|
|
#if __FreeBSD_version >= 500000
|
|
if (ret == 0) {
|
|
dcons_cnprobe(&dcons_consdev);
|
|
dcons_cninit(&dcons_consdev);
|
|
cnadd(&dcons_consdev);
|
|
}
|
|
#endif
|
|
break;
|
|
case MOD_UNLOAD:
|
|
printf("dcons: unload\n");
|
|
callout_stop(&dcons_callout);
|
|
#if __FreeBSD_version < 502122
|
|
#if defined(DDB) && DCONS_FORCE_GDB
|
|
#if CONS_NODEV
|
|
gdb_arg = NULL;
|
|
#else
|
|
gdbdev = NULL;
|
|
#endif
|
|
#endif
|
|
#endif
|
|
#if __FreeBSD_version >= 500000
|
|
cnremove(&dcons_consdev);
|
|
#endif
|
|
dcons_detach(DCONS_CON);
|
|
dcons_detach(DCONS_GDB);
|
|
dg.buf->magic = 0;
|
|
|
|
contigfree(dg.buf, DCONS_BUF_SIZE, M_DEVBUF);
|
|
|
|
break;
|
|
case MOD_SHUTDOWN:
|
|
#if 0 /* Keep connection after halt */
|
|
dg.buf->magic = 0;
|
|
#endif
|
|
break;
|
|
default:
|
|
err = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
return(err);
|
|
}
|
|
|
|
#if defined(GDB) && (__FreeBSD_version >= 502122)
|
|
/* Debugger interface */
|
|
|
|
static int
|
|
dcons_dbg_probe(void)
|
|
{
|
|
int dcons_gdb;
|
|
|
|
if (getenv_int("dcons_gdb", &dcons_gdb) == 0)
|
|
return (-1);
|
|
return (dcons_gdb);
|
|
}
|
|
|
|
static void
|
|
dcons_dbg_init(void)
|
|
{
|
|
}
|
|
|
|
static void
|
|
dcons_dbg_term(void)
|
|
{
|
|
}
|
|
|
|
static void
|
|
dcons_dbg_putc(int c)
|
|
{
|
|
struct dcons_softc *dc = &sc[DCONS_GDB];
|
|
dcons_os_putc(dc, c);
|
|
}
|
|
|
|
static int
|
|
dcons_dbg_getc(void)
|
|
{
|
|
struct dcons_softc *dc = &sc[DCONS_GDB];
|
|
return (dcons_os_getc(dc));
|
|
}
|
|
#endif
|
|
|
|
DEV_MODULE(dcons, dcons_modevent, NULL);
|
|
MODULE_VERSION(dcons, DCONS_VERSION);
|