main.c revision 86131
1248590Smm/*- 2248590Smm * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3248590Smm * All rights reserved. 4248590Smm * 5248590Smm * Redistribution and use in source and binary forms, with or without 6248590Smm * modification, are permitted provided that the following conditions 7248590Smm * are met: 8248590Smm * 1. Redistributions of source code must retain the above copyright 9248590Smm * notice, this list of conditions and the following disclaimer. 10248590Smm * 2. Redistributions in binary form must reproduce the above copyright 11248590Smm * notice, this list of conditions and the following disclaimer in the 12248590Smm * documentation and/or other materials provided with the distribution. 13248590Smm * 14248590Smm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15248590Smm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16248590Smm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17248590Smm * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18248590Smm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19248590Smm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20248590Smm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21248590Smm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22248590Smm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23248590Smm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24248590Smm * SUCH DAMAGE. 25248590Smm * 26248590Smm * $FreeBSD: head/sys/boot/pc98/loader/main.c 86131 2001-11-06 12:31:56Z nyan $ 27248590Smm */ 28248590Smm 29248590Smm/* 30248590Smm * MD bootstrap main() and assorted miscellaneous 31248590Smm * commands. 32248590Smm */ 33248590Smm 34248590Smm#include <stand.h> 35248590Smm#include <string.h> 36248590Smm#include <machine/bootinfo.h> 37248590Smm#include <sys/reboot.h> 38248590Smm 39248590Smm#include "bootstrap.h" 40248590Smm#include "libi386/libi386.h" 41248590Smm#include "btxv86.h" 42248590Smm 43248590Smm#define KARGS_FLAGS_CD 0x1 44248590Smm#define KARGS_FLAGS_PXE 0x2 45248590Smm 46248590Smm/* Arguments passed in from the boot1/boot2 loader */ 47248590Smmstatic struct 48248590Smm{ 49248590Smm u_int32_t howto; 50248590Smm u_int32_t bootdev; 51248590Smm u_int32_t bootflags; 52248590Smm u_int32_t pxeinfo; 53248590Smm u_int32_t res2; 54248590Smm u_int32_t bootinfo; 55248590Smm} *kargs; 56248590Smm 57248590Smmstatic u_int32_t initial_howto; 58248590Smmstatic u_int32_t initial_bootdev; 59248590Smmstatic struct bootinfo *initial_bootinfo; 60248590Smm 61248590Smmstruct arch_switch archsw; /* MI/MD interface boundary */ 62248590Smm 63248590Smmstatic void extract_currdev(void); 64248590Smmstatic int isa_inb(int port); 65248590Smmstatic void isa_outb(int port, int value); 66248590Smmvoid exit(int code); 67248590Smm 68248590Smm/* from vers.c */ 69248590Smmextern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 70248590Smm 71248590Smm/* XXX debugging */ 72248590Smmextern char end[]; 73248590Smm 74248590Smmint 75248590Smmmain(void) 76248590Smm{ 77248590Smm int i; 78248590Smm 79248590Smm /* Pick up arguments */ 80248590Smm kargs = (void *)__args; 81248590Smm initial_howto = kargs->howto; 82248590Smm initial_bootdev = kargs->bootdev; 83248590Smm initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 84248590Smm 85248590Smm /* 86248590Smm * Initialise the heap as early as possible. Once this is done, malloc() is usable. 87248590Smm */ 88248590Smm bios_getmem(); 89248590Smm 90248590Smm setheap((void *)end, (void *)bios_basemem); 91248590Smm 92248590Smm /* 93248590Smm * XXX Chicken-and-egg problem; we want to have console output early, but some 94248590Smm * console attributes may depend on reading from eg. the boot device, which we 95248590Smm * can't do yet. 96248590Smm * 97248590Smm * We can use printf() etc. once this is done. 98248590Smm * If the previous boot stage has requested a serial console, prefer that. 99248590Smm */ 100 if (initial_howto & RB_SERIAL) 101 setenv("console", "comconsole", 1); 102 if (initial_howto & RB_MUTE) 103 setenv("console", "nullconsole", 1); 104 cons_probe(); 105 106 /* 107 * Initialise the block cache 108 */ 109 bcache_init(32, 512); /* 16k cache XXX tune this */ 110 111 /* 112 * Special handling for PXE and CD booting. 113 */ 114 if (kargs->bootinfo == NULL) { 115 /* 116 * We only want the PXE disk to try to init itself in the below 117 * walk through devsw if we actually booted off of PXE. 118 */ 119 if (kargs->bootflags & KARGS_FLAGS_PXE) 120 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 121 else if (kargs->bootflags & KARGS_FLAGS_CD) 122 bc_add(initial_bootdev); 123 } 124 125 /* 126 * March through the device switch probing for things. 127 */ 128 for (i = 0; devsw[i] != NULL; i++) 129 if (devsw[i]->dv_init != NULL) 130 (devsw[i]->dv_init)(); 131 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 132 133#ifndef PC98 134 /* detect ACPI for future reference */ 135 biosacpi_detect(); 136#endif 137 138 printf("\n"); 139 printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 140 printf("(%s, %s)\n", bootprog_maker, bootprog_date); 141 142 extract_currdev(); /* set $currdev and $loaddev */ 143 setenv("LINES", "24", 1); /* optional */ 144 145 archsw.arch_autoload = i386_autoload; 146 archsw.arch_getdev = i386_getdev; 147 archsw.arch_copyin = i386_copyin; 148 archsw.arch_copyout = i386_copyout; 149 archsw.arch_readin = i386_readin; 150 archsw.arch_isainb = isa_inb; 151 archsw.arch_isaoutb = isa_outb; 152 153 interact(); /* doesn't return */ 154 155 /* if we ever get here, it is an error */ 156 return (1); 157} 158 159/* 160 * Set the 'current device' by (if possible) recovering the boot device as 161 * supplied by the initial bootstrap. 162 * 163 * XXX should be extended for netbooting. 164 */ 165static void 166extract_currdev(void) 167{ 168 struct i386_devdesc new_currdev; 169 int major, biosdev = -1; 170 171 /* Assume we are booting from a BIOS disk by default */ 172 new_currdev.d_dev = &biosdisk; 173 174 /* new-style boot loaders such as pxeldr and cdldr */ 175 if (kargs->bootinfo == NULL) { 176 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 177 /* we are booting from a CD with cdboot */ 178 new_currdev.d_dev = &bioscd; 179 new_currdev.d_kind.bioscd.unit = bc_bios2unit(initial_bootdev); 180 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 181 /* we are booting from pxeldr */ 182 new_currdev.d_dev = &pxedisk; 183 new_currdev.d_kind.netif.unit = 0; 184 } else { 185 /* we don't know what our boot device is */ 186 new_currdev.d_kind.biosdisk.slice = -1; 187 new_currdev.d_kind.biosdisk.partition = 0; 188 biosdev = -1; 189 } 190 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 191 /* The passed-in boot device is bad */ 192 new_currdev.d_kind.biosdisk.slice = -1; 193 new_currdev.d_kind.biosdisk.partition = 0; 194 biosdev = -1; 195 } else { 196 new_currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) + 197 B_CONTROLLER(initial_bootdev) - 1; 198 new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 199 biosdev = initial_bootinfo->bi_bios_dev; 200 major = B_TYPE(initial_bootdev); 201 202 /* 203 * If we are booted by an old bootstrap, we have to guess at the BIOS 204 * unit number. We will loose if there is more than one disk type 205 * and we are not booting from the lowest-numbered disk type 206 * (ie. SCSI when IDE also exists). 207 */ 208#ifdef PC98 209 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 210 if (B_TYPE(initial_bootdev) == 6) 211 biosdev = 0x30 + B_UNIT(initial_bootdev); 212 else 213 biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 214 } 215#else 216 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 217 biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 218#endif 219 } 220 new_currdev.d_type = new_currdev.d_dev->dv_type; 221 222 /* 223 * If we are booting off of a BIOS disk and we didn't succeed in determining 224 * which one we booted off of, just use disk0: as a reasonable default. 225 */ 226 if ((new_currdev.d_type == biosdisk.dv_type) && 227 ((new_currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1)) { 228 printf("Can't work out which disk we are booting from.\n" 229 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 230 new_currdev.d_kind.biosdisk.unit = 0; 231 } 232 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 233 i386_setcurrdev, env_nounset); 234 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 235 env_nounset); 236} 237 238COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 239 240static int 241command_reboot(int argc, char *argv[]) 242{ 243 int i; 244 245 for (i = 0; devsw[i] != NULL; ++i) 246 if (devsw[i]->dv_cleanup != NULL) 247 (devsw[i]->dv_cleanup)(); 248 249 printf("Rebooting...\n"); 250 delay(1000000); 251 __exit(0); 252} 253 254/* provide this for panic, as it's not in the startup code */ 255void 256exit(int code) 257{ 258 __exit(code); 259} 260 261COMMAND_SET(heap, "heap", "show heap usage", command_heap); 262 263static int 264command_heap(int argc, char *argv[]) 265{ 266 mallocstats(); 267 printf("heap base at %p, top at %p\n", end, sbrk(0)); 268 return(CMD_OK); 269} 270 271/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */ 272static int 273isa_inb(int port) 274{ 275 u_char data; 276 277 if (__builtin_constant_p(port) && 278 (((port) & 0xffff) < 0x100) && 279 ((port) < 0x10000)) { 280 __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); 281 } else { 282 __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 283 } 284 return(data); 285} 286 287static void 288isa_outb(int port, int value) 289{ 290 u_char al = value; 291 292 if (__builtin_constant_p(port) && 293 (((port) & 0xffff) < 0x100) && 294 ((port) < 0x10000)) { 295 __asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port))); 296 } else { 297 __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 298 } 299} 300 301