1 /* $NetBSD: cons.h,v 1.29 2022/10/03 19:12:29 riastradh Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: cons.h 1.6 92/01/21$ 37 * 38 * @(#)cons.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 #ifndef _SYS_DEV_CONS_H_ 42 #define _SYS_DEV_CONS_H_ 43 44 #include <sys/types.h> 45 46 struct consdev { 47 void (*cn_probe) /* probe hardware and fill in consdev info */ 48 (struct consdev *); 49 void (*cn_init) /* turn on as console */ 50 (struct consdev *); 51 int (*cn_getc) /* kernel getchar interface */ 52 (dev_t); 53 void (*cn_putc) /* kernel putchar interface */ 54 (dev_t, int); 55 void (*cn_pollc) /* turn on and off polling */ 56 (dev_t, int); 57 void (*cn_bell) /* ring bell */ 58 (dev_t, u_int, u_int, u_int); 59 void (*cn_halt) /* stop device */ 60 (dev_t); 61 void (*cn_flush) /* flush output */ 62 (dev_t); 63 dev_t cn_dev; /* major/minor of device */ 64 int cn_pri; /* pecking order; the higher the better */ 65 }; 66 67 /* values for cn_pri - reflect our policy for console selection */ 68 #define CN_DEAD 0 /* device doesn't exist */ 69 #define CN_NULL 1 /* noop console */ 70 #define CN_NORMAL 2 /* device exists but is nothing special */ 71 #define CN_INTERNAL 3 /* "internal" bit-mapped display */ 72 #define CN_REMOTE 4 /* serial interface with remote bit set */ 73 74 #ifdef _KERNEL 75 76 extern struct consdev constab[]; 77 extern struct consdev *cn_tab; 78 79 void cn_set_tab(struct consdev *); 80 81 void cninit(void); 82 int cngetc(void); 83 int cngetsn(char *, int); 84 void cnputc(int); 85 void cnpollc(int); 86 void cnbell(u_int, u_int, u_int); 87 void cnflush(void); 88 void cnhalt(void); 89 void cnrint(void); 90 void nullcnprobe(struct consdev *); 91 void nullcninit(struct consdev *); 92 void nullcnpollc(dev_t, int); 93 void nullconsattach(int); 94 95 /* console-specific types */ 96 #define dev_type_cnprobe(n) void n(struct consdev *) 97 #define dev_type_cninit(n) void n(struct consdev *) 98 #define dev_type_cngetc(n) int n(dev_t) 99 #define dev_type_cnputc(n) void n(dev_t, int) 100 #define dev_type_cnpollc(n) void n(dev_t, int) 101 #define dev_type_cnbell(n) void n(dev_t, u_int, u_int, u_int) 102 #define dev_type_cnhalt(n) void n(dev_t) 103 #define dev_type_cnflush(n) void n(dev_t) 104 105 #define dev_decl(n,t) __CONCAT(dev_type_,t)(__CONCAT(n,t)) 106 #define dev_init(n,t) __CONCAT(n,t) 107 108 #define cons_decl(n) \ 109 dev_decl(n,cnprobe); dev_decl(n,cninit); dev_decl(n,cngetc); \ 110 dev_decl(n,cnputc); dev_decl(n,cnpollc); dev_decl(n,cnbell); \ 111 dev_decl(n,cnflush); dev_decl(n,cnhalt); 112 113 #define cons_init(n) { \ 114 dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \ 115 dev_init(n,cnputc), dev_init(n,cnpollc), NULL, NULL, NULL, \ 116 0, 0 } 117 118 #define cons_init_bell(n) { \ 119 dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \ 120 dev_init(n,cnputc), dev_init(n,cnpollc), dev_init(n,cnbell) } 121 122 #define cons_init_halt(n) { \ 123 dev_init(n,cnprobe), dev_init(n,cninit), dev_init(n,cngetc), \ 124 dev_init(n,cnputc), dev_init(n,cnpollc), 0, \ 125 dev_init(n,cnhalt) } 126 127 #endif 128 129 #endif /* _SYS_DEV_CONS_H_ */ 130