consinit.c revision 1.18
1 /* $NetBSD: consinit.c,v 1.18 2005/05/31 00:50:28 christos 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 <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.18 2005/05/31 00:50:28 christos Exp $"); 33 34 #include "opt_ddb.h" 35 #include "pcons.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/conf.h> 40 #include <sys/device.h> 41 #include <sys/file.h> 42 #include <sys/ioctl.h> 43 #include <sys/kernel.h> 44 #include <sys/proc.h> 45 #include <sys/tty.h> 46 #include <sys/time.h> 47 #include <sys/syslog.h> 48 49 #include <machine/autoconf.h> 50 #include <machine/openfirm.h> 51 #include <machine/bsd_openprom.h> 52 #include <machine/cpu.h> 53 #include <machine/eeprom.h> 54 #include <machine/psl.h> 55 #include <machine/z8530var.h> 56 #include <machine/sparc64.h> 57 58 #include <dev/cons.h> 59 60 #include <sparc64/dev/cons.h> 61 62 static void prom_cnprobe __P((struct consdev *)); 63 static void prom_cninit __P((struct consdev *)); 64 int prom_cngetc __P((dev_t)); 65 static void prom_cnputc __P((dev_t, int)); 66 static void prom_cnpollc __P((dev_t, int)); 67 static void prom_cnputc __P((dev_t, int)); 68 69 /* 70 * The console is set to this one initially, 71 * which lets us use the PROM until consinit() 72 * is called to select a real console. 73 */ 74 struct consdev consdev_prom = { 75 prom_cnprobe, 76 prom_cninit, 77 prom_cngetc, 78 prom_cnputc, 79 prom_cnpollc, 80 NULL, 81 }; 82 83 /* 84 * The console table pointer is statically initialized 85 * to point to the PROM (output only) table, so that 86 * early calls to printf will work. 87 */ 88 struct consdev *cn_tab = &consdev_prom; 89 90 void 91 prom_cnprobe(cd) 92 struct consdev *cd; 93 { 94 #if NPCONS > 0 95 int maj; 96 extern const struct cdevsw pcons_cdevsw; 97 98 maj = cdevsw_lookup_major(&pcons_cdevsw); 99 cd->cn_dev = makedev(maj, 0); 100 cd->cn_pri = CN_INTERNAL; 101 #endif 102 } 103 104 int 105 prom_cngetc(dev) 106 dev_t dev; 107 { 108 unsigned char ch = '\0'; 109 int l; 110 #ifdef DDB 111 static int nplus = 0; 112 #endif 113 114 while ((l = prom_read(prom_stdin(), &ch, 1)) != 1) 115 /* void */; 116 #ifdef DDB 117 if (ch == '+') { 118 if (nplus++ > 3) Debugger(); 119 } else nplus = 0; 120 #endif 121 if (ch == '\r') 122 ch = '\n'; 123 return ch; 124 } 125 126 static void 127 prom_cninit(cn) 128 struct consdev *cn; 129 { 130 } 131 132 /* 133 * PROM console output putchar. 134 */ 135 static void 136 prom_cnputc(dev, c) 137 dev_t dev; 138 int c; 139 { 140 int s; 141 char c0 = (c & 0x7f); 142 143 s = splhigh(); 144 prom_write(prom_stdout(), &c0, 1); 145 splx(s); 146 } 147 148 void 149 prom_cnpollc(dev, on) 150 dev_t dev; 151 int on; 152 { 153 if (on) { 154 /* Entering debugger. */ 155 #if NFB > 0 156 fb_unblank(); 157 #endif 158 } else { 159 /* Resuming kernel. */ 160 } 161 #if NPCONS > 0 162 pcons_cnpollc(dev, on); 163 #endif 164 } 165 166 /*****************************************************************/ 167 168 #ifdef DEBUG 169 #define DBPRINT(x) prom_printf x 170 #else 171 #define DBPRINT(x) 172 #endif 173 174 int prom_stdin_node; 175 int prom_stdout_node; 176 177 /* 178 * This function replaces sys/dev/cninit.c 179 * Determine which device is the console using 180 * the PROM "input source" and "output sink". 181 */ 182 void 183 consinit() 184 { 185 int chosen; 186 char buffer[128]; 187 const char *consname = "unknown"; 188 189 DBPRINT(("consinit()\r\n")); 190 191 if (cn_tab != &consdev_prom) 192 return; 193 194 chosen = prom_finddevice("/chosen"); 195 196 if ((prom_stdin_node = prom_instance_to_package(prom_stdin())) == 0) { 197 printf("WARNING: no PROM stdin\n"); 198 } 199 DBPRINT(("stdin node = %x\r\n", prom_stdin_node)); 200 201 if ((prom_stdout_node = prom_instance_to_package(prom_stdout())) == 0) 202 printf("WARNING: no PROM stdout\n"); 203 DBPRINT(("stdout package = %x\r\n", prom_stdout_node)); 204 205 DBPRINT(("buffer @ %p\r\n", buffer)); 206 207 if (prom_stdin_node != 0 && 208 (prom_getproplen(prom_stdin_node, "keyboard") >= 0)) { 209 #if NKBD > 0 210 printf("cninit: kdb/display not configured\n"); 211 #endif 212 consname = "keyboard/display"; 213 } else if (prom_stdout_node != 0 && 214 (OF_instance_to_path(prom_stdin(), buffer, sizeof(buffer)) >= 0)) { 215 consname = buffer; 216 } 217 printf("console is %s\n", consname); 218 219 /* Initialize PROM console */ 220 (*cn_tab->cn_probe)(cn_tab); 221 (*cn_tab->cn_init)(cn_tab); 222 } 223 224
Indexes created Thu Sep 25 16:09:42 GMT 2025