consinit.c revision 1.8
1 /* $NetBSD: consinit.c,v 1.8 2012/07/30 17:27:20 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 Matthew Fredette 5 * Copyright (c) 1999 Eduardo E. Horvath 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.8 2012/07/30 17:27:20 christos Exp $"); 34 35 #include "opt_ddb.h" 36 #include "opt_kgdb.h" 37 #include "pcons.h" 38 #include "kbd.h" 39 #include "zs.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/conf.h> 44 #include <sys/device.h> 45 #include <sys/file.h> 46 #include <sys/ioctl.h> 47 #include <sys/kernel.h> 48 #include <sys/proc.h> 49 #include <sys/tty.h> 50 #include <sys/time.h> 51 #include <sys/syslog.h> 52 #include <sys/kgdb.h> 53 54 #include <machine/autoconf.h> 55 #include <machine/promlib.h> 56 #include <machine/cpu.h> 57 #include <machine/eeprom.h> 58 #include <machine/psl.h> 59 #include <machine/z8530var.h> 60 61 #include <dev/cons.h> 62 63 #include <sun2/dev/cons.h> 64 65 static void prom_cnprobe(struct consdev *); 66 static void prom_cninit(struct consdev *); 67 int prom_cngetc(dev_t); 68 static void prom_cnputc(dev_t, int); 69 static void prom_cnpollc(dev_t, int); 70 static void prom_cnputc(dev_t, int); 71 72 #ifdef PROM_OBP_V2 73 /* 74 * The following several variables are related to 75 * the configuration process, and are used in initializing 76 * the machine. 77 */ 78 int prom_stdin_node; /* node ID of ROM's console input device */ 79 int prom_stdout_node; /* node ID of ROM's console output device */ 80 char prom_stdin_args[16]; 81 char prom_stdout_args[16]; 82 #endif /* PROM_OBP_V2 */ 83 84 /* 85 * The console is set to this one initially, 86 * which lets us use the PROM until consinit() 87 * is called to select a real console. 88 */ 89 struct consdev consdev_prom = { 90 prom_cnprobe, 91 prom_cninit, 92 prom_cngetc, 93 prom_cnputc, 94 prom_cnpollc, 95 NULL, 96 }; 97 98 /* 99 * The console table pointer is statically initialized 100 * to point to the PROM (output only) table, so that 101 * early calls to printf will work. This has been moved 102 * to cpu_startup() 103 */ 104 #if 0 105 struct consdev *cn_tab = &consdev_prom; 106 #endif 107 108 void 109 prom_cnprobe(struct consdev *cd) 110 { 111 #if NPCONS > 0 112 extern const struct cdevsw pcons_cdevsw; 113 114 cd->cn_dev = makedev(cdevsw_lookup_major(&pcons_cdevsw), 0); 115 cd->cn_pri = CN_INTERNAL; 116 #endif 117 } 118 119 int 120 prom_cngetc(dev_t dev) 121 { 122 int ch; 123 #ifdef DDB 124 static int nplus = 0; 125 #endif 126 127 ch = prom_getchar(); 128 #ifdef DDB 129 if (ch == '+') { 130 if (nplus++ > 3) Debugger(); 131 } else nplus = 0; 132 #endif 133 return ch; 134 } 135 136 static void 137 prom_cninit(struct consdev *cn) 138 { 139 } 140 141 /* 142 * PROM console output putchar. 143 */ 144 static void 145 prom_cnputc(dev_t dev, int c) 146 { 147 int s; 148 149 s = splhigh(); 150 prom_putchar(c); 151 splx(s); 152 } 153 154 void 155 prom_cnpollc(dev_t dev, 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 #ifdef notyet /* PROM_OBP_V2 */ 179 void 180 prom_get_device_args(const char *prop, char *dev, unsigned int dev_sz, 181 char *args, unsigned int args_sz) 182 { 183 char *cp, buffer[128]; 184 185 getpropstringA(prom_findroot(), (char *)prop, buffer, sizeof buffer); 186 187 /* 188 * Extract device-specific arguments from a PROM device path (if any) 189 */ 190 cp = buffer + strlen(buffer); 191 while (cp >= buffer) { 192 if (*cp == ':') { 193 strncpy(args, cp+1, args_sz); 194 *cp = '\0'; 195 strncpy(dev, buffer, dev_sz); 196 break; 197 } 198 cp--; 199 } 200 } 201 #endif /* PROM_OBP_V2 */ 202 203 /* 204 * This function replaces sys/dev/cninit.c 205 * Determine which device is the console using 206 * the PROM "input source" and "output sink". 207 */ 208 void 209 consinit(void) 210 { 211 #ifdef notyet /* PROM_OBP_V2 */ 212 char buffer[128]; 213 #endif /* PROM_OBP_V2 */ 214 const char *consname = "unknown"; 215 #if KGDB 216 #if NZS > 0 217 extern const struct cdevsw zstty_cdevsw; 218 #endif 219 #endif 220 221 DBPRINT(("consinit()\r\n")); 222 if (cn_tab != &consdev_prom) return; 223 224 switch(prom_version()) { 225 #ifdef PROM_OLDMON 226 case PROM_OLDMON: 227 case PROM_OBP_V0: 228 switch(prom_stdin()) { 229 case PROMDEV_KBD: 230 consname = "keyboard/display"; 231 break; 232 case PROMDEV_TTYA: 233 consname = "ttya"; 234 break; 235 case PROMDEV_TTYB: 236 consname = "ttyb"; 237 break; 238 } 239 break; 240 #endif /* PROM_OLDMON */ 241 242 #ifdef notyet /* PROM_OBP_V2 */ 243 case PROM_OBP_V2: 244 case PROM_OBP_V3: 245 case PROM_OPENFIRM: 246 247 /* Save PROM arguments for device matching */ 248 prom_get_device_args("stdin-path", 249 buffer, 250 sizeof(buffer), 251 prom_stdin_args, 252 sizeof(prom_stdin_args)); 253 prom_get_device_args("stdout-path", 254 buffer, 255 sizeof(buffer), 256 prom_stdout_args, 257 sizeof(prom_stdout_args)); 258 259 /* 260 * Translate the STDIO package instance (`ihandle') -- that 261 * the PROM has already opened for us -- to a device tree 262 * node (i.e. a `phandle'). 263 */ 264 DBPRINT(("stdin instance = %x\r\n", prom_stdin())); 265 if ((prom_stdin_node = prom_instance_to_package(prom_stdin())) == 0) { 266 printf("WARNING: no PROM stdin\n"); 267 } 268 DBPRINT(("stdin package = %x\r\n", prom_stdin_node)); 269 270 DBPRINT(("stdout instance = %x\r\n", prom_stdout())); 271 if ((prom_stdout_node = prom_instance_to_package(prom_stdout())) == 0) { 272 printf("WARNING: no PROM stdout\n"); 273 } 274 DBPRINT(("stdout package = %x\r\n", prom_stdout_node)); 275 DBPRINT(("buffer @ %p\r\n", buffer)); 276 277 if (prom_stdin_node && prom_node_has_property(prom_stdin_node, "keyboard")) { 278 #if NKBD == 0 279 printf("cninit: kdb/display not configured\n"); 280 #endif 281 consname = "keyboard/display"; 282 } else if (prom_stdout_node) 283 consname = buffer; 284 #endif /* PROM_OBP_V2 */ 285 } 286 printf("console is %s\n", consname); 287 288 /* Initialize PROM console */ 289 (*cn_tab->cn_probe)(cn_tab); 290 (*cn_tab->cn_init)(cn_tab); 291 292 #ifdef KGDB 293 /* Set up KGDB */ 294 #if NZS > 0 295 if (cdevsw_lookup(kgdb_dev) == &zstty_cdevsw) 296 zs_kgdb_init(); 297 #endif /* NZS > 0 */ 298 #endif /* KGDB */ 299 } 300 301
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