1 /* $NetBSD: consinit.c,v 1.12 2002/09/06 13:18:43 gehenna Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 Eduardo E. Horvath 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include "opt_ddb.h" 32 #include "pcons.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/conf.h> 37 #include <sys/device.h> 38 #include <sys/file.h> 39 #include <sys/ioctl.h> 40 #include <sys/kernel.h> 41 #include <sys/proc.h> 42 #include <sys/tty.h> 43 #include <sys/time.h> 44 #include <sys/syslog.h> 45 46 #include <machine/autoconf.h> 47 #include <machine/openfirm.h> 48 #include <machine/bsd_openprom.h> 49 #include <machine/cpu.h> 50 #include <machine/eeprom.h> 51 #include <machine/psl.h> 52 #include <machine/z8530var.h> 53 #include <machine/sparc64.h> 54 55 #include <dev/cons.h> 56 57 #include <sparc64/dev/cons.h> 58 59 static void prom_cnprobe __P((struct consdev *)); 60 static void prom_cninit __P((struct consdev *)); 61 int prom_cngetc __P((dev_t)); 62 static void prom_cnputc __P((dev_t, int)); 63 static void prom_cnpollc __P((dev_t, int)); 64 static void prom_cnputc __P((dev_t, int)); 65 66 int stdin = NULL, stdout = NULL; 67 68 /* 69 * The console is set to this one initially, 70 * which lets us use the PROM until consinit() 71 * is called to select a real console. 72 */ 73 struct consdev consdev_prom = { 74 prom_cnprobe, 75 prom_cninit, 76 prom_cngetc, 77 prom_cnputc, 78 prom_cnpollc, 79 NULL, 80 }; 81 82 /* 83 * The console table pointer is statically initialized 84 * to point to the PROM (output only) table, so that 85 * early calls to printf will work. 86 */ 87 struct consdev *cn_tab = &consdev_prom; 88 89 void 90 prom_cnprobe(cd) 91 struct consdev *cd; 92 { 93 #if NPCONS > 0 94 int maj; 95 extern const struct cdevsw pcons_cdevsw; 96 97 maj = cdevsw_lookup_major(&pcons_cdevsw); 98 cd->cn_dev = makedev(maj, 0); 99 cd->cn_pri = CN_INTERNAL; 100 #endif 101 } 102 103 int 104 prom_cngetc(dev) 105 dev_t dev; 106 { 107 unsigned char ch = '\0'; 108 int l; 109 #ifdef DDB 110 static int nplus = 0; 111 #endif 112 113 while ((l = OF_read(stdin, &ch, 1)) != 1) 114 /* void */; 115 #ifdef DDB 116 if (ch == '+') { 117 if (nplus++ > 3) Debugger(); 118 } else nplus = 0; 119 #endif 120 if (ch == '\r') 121 ch = '\n'; 122 return ch; 123 } 124 125 static void 126 prom_cninit(cn) 127 struct consdev *cn; 128 { 129 if (!stdin) stdin = OF_stdin(); 130 if (!stdout) stdout = OF_stdout(); 131 } 132 133 /* 134 * PROM console output putchar. 135 */ 136 static void 137 prom_cnputc(dev, c) 138 dev_t dev; 139 int c; 140 { 141 int s; 142 char c0 = (c & 0x7f); 143 144 #if 0 145 if (!stdout) stdout = OF_stdout(); 146 #endif 147 s = splhigh(); 148 OF_write(stdout, &c0, 1); 149 splx(s); 150 } 151 152 void 153 prom_cnpollc(dev, on) 154 dev_t dev; 155 int on; 156 { 157 if (on) { 158 /* Entering debugger. */ 159 #if NFB > 0 160 fb_unblank(); 161 #endif 162 } else { 163 /* Resuming kernel. */ 164 } 165 #if NPCONS > 0 166 pcons_cnpollc(dev, on); 167 #endif 168 } 169 170 /*****************************************************************/ 171 172 #ifdef DEBUG 173 #define DBPRINT(x) prom_printf x 174 #else 175 #define DBPRINT(x) 176 #endif 177 178 /* 179 * This function replaces sys/dev/cninit.c 180 * Determine which device is the console using 181 * the PROM "input source" and "output sink". 182 */ 183 void 184 consinit() 185 { 186 register int chosen; 187 char buffer[128]; 188 extern int stdinnode, fbnode; 189 char *consname = "unknown"; 190 191 DBPRINT(("consinit()\r\n")); 192 if (cn_tab != &consdev_prom) return; 193 194 DBPRINT(("setting up stdin\r\n")); 195 chosen = OF_finddevice("/chosen"); 196 DBPRINT(("chosen = %x, stdin @ %p\r\n", chosen, &stdin)); 197 OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)); 198 DBPRINT(("stdin instance = %x\r\n", stdin)); 199 200 if ((stdinnode = OF_instance_to_package(stdin)) == 0) { 201 printf("WARNING: no PROM stdin\n"); 202 } 203 204 DBPRINT(("stdin node = %x\r\n", stdinnode)); 205 DBPRINT(("setting up stdout\r\n")); 206 OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)); 207 208 DBPRINT(("stdout instance = %x\r\n", stdout)); 209 210 if ((fbnode = OF_instance_to_package(stdout)) == 0) 211 printf("WARNING: no PROM stdout\n"); 212 213 DBPRINT(("stdout package = %x\r\n", fbnode)); 214 DBPRINT(("buffer @ %p\r\n", buffer)); 215 216 if (stdinnode && (OF_getproplen(stdinnode,"keyboard") >= 0)) { 217 #if NKBD > 0 218 printf("cninit: kdb/display not configured\n"); 219 #endif 220 consname = "keyboard/display"; 221 } else if (fbnode && 222 (OF_instance_to_path(stdin, buffer, sizeof(buffer)) >= 0)) { 223 consname = buffer; 224 } 225 printf("console is %s\n", consname); 226 227 /* Initialize PROM console */ 228 (*cn_tab->cn_probe)(cn_tab); 229 (*cn_tab->cn_init)(cn_tab); 230 } 231 232