main.c revision 39931
1/*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $Id: main.c,v 1.9 1998/10/02 16:33:43 msmith Exp $ 27 */ 28 29/* 30 * MD bootstrap main() and assorted miscellaneous 31 * commands. 32 */ 33 34#include <stand.h> 35#include <string.h> 36#include <machine/bootinfo.h> 37#include <sys/reboot.h> 38 39#include "bootstrap.h" 40#include "libi386/libi386.h" 41#include "btxv86.h" 42 43/* Arguments passed in from the boot1/boot2 loader */ 44static struct 45{ 46 u_int32_t howto; 47 u_int32_t bootdev; 48 u_int32_t res0; 49 u_int32_t res1; 50 u_int32_t res2; 51 u_int32_t bootinfo; 52} *kargs; 53 54struct bootinfo *initial_bootinfo; 55 56struct arch_switch archsw; /* MI/MD interface boundary */ 57 58static void extract_currdev(void); 59 60/* from vers.c */ 61extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 62 63/* XXX debugging */ 64extern char end[]; 65 66void 67main(void) 68{ 69 int i; 70 71 /* Pick up arguments */ 72 kargs = (void *)__args; 73 initial_bootinfo = (struct bootinfo *)PTOV(kargs->bootinfo); 74 75 /* 76 * Initialise the heap as early as possible. Once this is done, malloc() is usable. 77 * 78 * XXX better to locate end of memory and use that 79 */ 80 setheap((void *)end, (void *)(end + (384 * 1024))); 81 82 /* 83 * XXX Chicken-and-egg problem; we want to have console output early, but some 84 * console attributes may depend on reading from eg. the boot device, which we 85 * can't do yet. 86 * 87 * We can use printf() etc. once this is done. 88 * If the previous boot stage has requested a serial console, prefer that. 89 */ 90 if (kargs->howto & RB_SERIAL) 91 setenv("console", "comconsole", 1); 92 cons_probe(); 93 94 /* 95 * March through the device switch probing for things. 96 */ 97 for (i = 0; devsw[i] != NULL; i++) 98 if (devsw[i]->dv_init != NULL) 99 (devsw[i]->dv_init)(); 100 101 printf("\n"); 102 printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 103 printf("(%s, %s)\n", bootprog_maker, bootprog_date); 104 printf("memory: %d/%dkB\n", getbasemem(), getextmem()); 105#if 0 106 printf("diskbuf at %p, %d sectors\n", &diskbuf, diskbuf_size); 107 printf("using %d bytes of stack at %p\n", (&stacktop - &stackbase), &stacktop); 108#endif 109 110 extract_currdev(); /* set $currdev and $loaddev */ 111 setenv("LINES", "24", 1); /* optional */ 112 113 archsw.arch_autoload = i386_autoload; 114 archsw.arch_getdev = i386_getdev; 115 archsw.arch_copyin = i386_copyin; 116 archsw.arch_copyout = i386_copyout; 117 archsw.arch_readin = i386_readin; 118 /* 119 * XXX should these be in the MI source? 120 */ 121#if 0 122 legacy_config(); /* read old /boot.config file */ 123#endif 124 interact(); /* doesn't return */ 125} 126 127/* 128 * Set the 'current device' by (if possible) recovering the boot device as 129 * supplied by the initial bootstrap. 130 * 131 * XXX should be extended for netbooting. 132 */ 133static void 134extract_currdev(void) 135{ 136 struct i386_devdesc currdev; 137 int major, biosdev, i; 138 139 /* We're booting from a BIOS disk, try to spiff this */ 140 currdev.d_dev = devsw[0]; /* XXX presumes that biosdisk is first in devsw */ 141 currdev.d_type = currdev.d_dev->dv_type; 142 currdev.d_kind.biosdisk.slice = (B_ADAPTOR(kargs->bootdev) << 4) + B_CONTROLLER(kargs->bootdev) - 1; 143 currdev.d_kind.biosdisk.partition = B_PARTITION(kargs->bootdev); 144 145 biosdev = initial_bootinfo->bi_bios_dev; 146 major = B_TYPE(kargs->bootdev); 147 148 /* 149 * If we are booted by an old bootstrap, we have to guess at the BIOS 150 * unit number. We will loose if there is more than one disk type 151 * and we are not booting from the lowest-numbered disk type. 152 */ 153 if ((biosdev == 0) && (major != 2)) /* biosdev doesn't match major */ 154 biosdev = 0x80 + B_UNIT(kargs->bootdev); /* assume harddisk */ 155 156 if ((currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1) { 157 printf("Can't work out which disk we are booting from, defaulting to disk0:\n"); 158 currdev.d_kind.biosdisk.unit; 159 } 160 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset); 161 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset); 162} 163 164COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 165 166static int 167command_reboot(int argc, char *argv[]) 168{ 169 170 printf("Rebooting...\n"); 171 delay(1000000); 172 __exit(0); 173} 174 175/* provide this for panic, as it's not in the startup code */ 176void 177exit(int code) 178{ 179 __exit(code); 180} 181 182COMMAND_SET(heap, "heap", "show heap usage", command_heap); 183 184static int 185command_heap(int argc, char *argv[]) 186{ 187 mallocstats(); 188 printf("heap base at %p, top at %p\n", end, sbrk(0)); 189 return(CMD_OK); 190} 191