e7451974bb
the first one in the config has priority. They can be switched using userconfig(). i386/i386/conf.c: Initialize the shared syscons/pcvt cdevsw entry to `nx'. Add cdevsw registration functions. Use devsw functions of the correct type if they exist. i386/i386/cons.c: Add renamed syscons entry points to constab. i386/i386/cons.h: Declare the renamed syscons entry points. i386/i386/machdep.c: Repeat console initialization after userconfig() in case the current console has become wrong. This depends on cn functions not wiring down anything important. sys/conf.h: Declare new functions. i386/isa/isa.[ch]: Add a function to decide which display driver has priority. Should be done better. i386/isa/syscons.c: Rename pccn* -> sccn*. Initialize CRTC start address in case the previous driver has moved it. i386/isa/syscons.c, i386/isa/pcvt/* Initialize the bogusly shared variable Crtat dynamically in case the stored value was changed by the previous driver. Initialize cdevsw table from a template. Don't grab the console if another display driver has priority. i386/isa/syscons.h, i386/isa/pcvt/pcvt_hdr.h: Don't externally declare now-static cdevsw functions. i386/isa/pcvt/pcvt_hdr.h: Set the sensitive hardware flag so that pcvt doesn't always have lower priority than syscons. This also fixes the "stupid" detection of the display after filling the display with text. i386/isa/pcvt/pcvt_out.c: Don't be confused the off-screen cursor offset 0xffff set by syscons. kern/subr_xxx.c: Add enough nxio/nodev/null devsw functions of the correct type for syscons and pcvt.
127 lines
4.3 KiB
C
127 lines
4.3 KiB
C
/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University 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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* from: @(#)cons.h 7.2 (Berkeley) 5/9/91
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* $Id: cons.h,v 1.10 1995/09/10 18:57:26 bde Exp $
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*/
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#ifndef _MACHINE_CONS_H_
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#define _MACHINE_CONS_H_ 1
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struct consdev;
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typedef void cn_probe_t __P((struct consdev *));
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typedef void cn_init_t __P((struct consdev *));
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typedef int cn_getc_t __P((dev_t));
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typedef int cn_checkc_t __P((dev_t));
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typedef void cn_putc_t __P((dev_t, int));
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#ifdef KERNEL
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/*
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* XXX public functions in drivers should be declared in headers produced
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* by `config', not here.
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*/
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cn_probe_t pccnprobe;
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cn_init_t pccninit;
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cn_getc_t pccngetc;
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cn_checkc_t pccncheckc;
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cn_putc_t pccnputc;
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cn_probe_t sccnprobe;
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cn_init_t sccninit;
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cn_getc_t sccngetc;
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cn_checkc_t sccncheckc;
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cn_putc_t sccnputc;
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cn_probe_t siocnprobe;
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cn_init_t siocninit;
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cn_getc_t siocngetc;
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cn_checkc_t siocncheckc;
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cn_putc_t siocnputc;
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#endif /* KERNEL */
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struct consdev {
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cn_probe_t *cn_probe;
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/* probe hardware and fill in consdev info */
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cn_init_t *cn_init;
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/* turn on as console */
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cn_getc_t *cn_getc;
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/* kernel getchar interface */
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cn_checkc_t *cn_checkc;
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/* kernel "return char if available" interface */
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cn_putc_t *cn_putc;
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/* kernel putchar interface */
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struct tty *cn_tp; /* tty structure for console device */
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dev_t cn_dev; /* major/minor of device */
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short cn_pri; /* pecking order; the higher the better */
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};
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/* values for cn_pri - reflect our policy for console selection */
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#define CN_DEAD 0 /* device doesn't exist */
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#define CN_NORMAL 1 /* device exists but is nothing special */
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#define CN_INTERNAL 2 /* "internal" bit-mapped display */
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#define CN_REMOTE 3 /* serial interface with remote bit set */
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/* XXX */
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#define CONSMAJOR 0
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#ifdef KERNEL
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extern struct consdev constab[];
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extern struct consdev *cn_tab;
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extern struct tty *cn_tty;
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extern int cons_unavail;
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struct proc; struct uio;
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/* cdevsw[] entries */
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extern int cnopen(dev_t, int, int, struct proc *);
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extern int cnclose(dev_t, int, int, struct proc *);
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extern int cnread(dev_t, struct uio *, int);
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extern int cnwrite(dev_t, struct uio *, int);
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extern int cnioctl(dev_t, int, caddr_t, int, struct proc *);
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extern int cnselect(dev_t, int, struct proc *);
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/* other kernel entry points */
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extern void cninit(void);
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extern void cninit_finish(void);
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extern int cngetc(void);
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extern int cncheckc(void);
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extern void cnputc(int);
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extern int pg(const char *, ...);
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#endif /* KERNEL */
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#endif /* _MACHINE_CONS_H_ */
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