1 /* $NetBSD: prom.c,v 1.3 1997/09/06 14:03:58 drochner Exp $ */ 2 3 /*- 4 * Mach Operating System 5 * Copyright (c) 1992 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie Mellon 26 * the rights to redistribute these changes. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 34 #include "bootstrap.h" 35 #include "openfirm.h" 36 37 static void ofw_cons_probe(struct console *cp); 38 static int ofw_cons_init(int); 39 void ofw_cons_putchar(int); 40 int ofw_cons_getchar(void); 41 int ofw_cons_poll(void); 42 43 static ihandle_t stdin; 44 static ihandle_t stdout; 45 46 struct console ofwconsole = { 47 .c_name = "ofw", 48 .c_desc = "Open Firmware console", 49 .c_flags = 0, 50 .c_probe = ofw_cons_probe, 51 .c_init = ofw_cons_init, 52 .c_out = ofw_cons_putchar, 53 .c_in = ofw_cons_getchar, 54 .c_ready = ofw_cons_poll, 55 .c_private = NULL 56 }; 57 58 static void 59 ofw_cons_probe(struct console *cp) 60 { 61 62 OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)); 63 OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)); 64 cp->c_flags |= C_PRESENTIN|C_PRESENTOUT; 65 } 66 67 static int 68 ofw_cons_init(int arg) 69 { 70 return 0; 71 } 72 73 void 74 ofw_cons_putchar(int c) 75 { 76 char cbuf; 77 78 if (c == '\n') { 79 cbuf = '\r'; 80 OF_write(stdout, &cbuf, 1); 81 } 82 83 cbuf = c; 84 OF_write(stdout, &cbuf, 1); 85 } 86 87 static int saved_char = -1; 88 89 int 90 ofw_cons_getchar() 91 { 92 unsigned char ch = '\0'; 93 int l; 94 95 if (saved_char != -1) { 96 l = saved_char; 97 saved_char = -1; 98 return l; 99 } 100 101 if (OF_read(stdin, &ch, 1) > 0) 102 return (ch); 103 104 return (-1); 105 } 106 107 int 108 ofw_cons_poll() 109 { 110 unsigned char ch; 111 112 if (saved_char != -1) 113 return 1; 114 115 if (OF_read(stdin, &ch, 1) > 0) { 116 saved_char = ch; 117 return 1; 118 } 119 120 return 0; 121 } 122