/* * Copyright (c) 1988 University of Utah. * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * %sccs.include.redist.c% * * from: Utah $Hdr: cons.h 1.1 90/07/09$ * * @(#)cons.h 7.3 (Berkeley) 11/02/90 */ struct consdev { int (*cn_probe)(); /* probe hardware and fill in consdev info */ int (*cn_init)(); /* turn on as console */ int (*cn_getc)(); /* kernel getchar interface */ int (*cn_putc)(); /* kernel putchar interface */ struct tty *cn_tp; /* tty structure for console device */ dev_t cn_dev; /* major/minor of device */ short cn_pri; /* pecking order; the higher the better */ }; /* values for cn_pri - reflect our policy for console selection */ #define CN_DEAD 0 /* device doesn't exist */ #define CN_NORMAL 1 /* device exists but is nothing special */ #define CN_INTERNAL 2 /* "internal" bit-mapped display */ #define CN_REMOTE 3 /* serial interface with remote bit set */ /* XXX */ #define CONSMAJOR 0 #ifdef KERNEL extern struct consdev constab[]; extern struct consdev *cn_tab; extern struct tty *cn_tty; #endif