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 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30/* 31 * MD bootstrap main() and assorted miscellaneous 32 * commands. 33 */ 34 35#include <stand.h> 36#include <stddef.h> 37#include <string.h> 38#include <machine/bootinfo.h> 39#include <machine/cpufunc.h> 40#include <sys/param.h> 41#include <sys/reboot.h> 42 43#include "bootstrap.h" 44#include "common/bootargs.h" 45#include "libi386/libi386.h" 46#include "libpc98/libpc98.h" 47#include "btxv86.h" 48 49CTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE); 50CTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO); 51CTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS); 52CTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE); 53 54/* Arguments passed in from the boot1/boot2 loader */ 55static struct bootargs *kargs; 56 57static u_int32_t initial_howto; 58static u_int32_t initial_bootdev; 59static struct bootinfo *initial_bootinfo; 60 61struct arch_switch archsw; /* MI/MD interface boundary */ 62 63static void extract_currdev(void); 64static int isa_inb(int port); 65static void isa_outb(int port, int value); 66void exit(int code); 67 68/* from vers.c */ 69extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 70 71/* XXX debugging */ 72extern char end[]; 73 74static void *heap_top; 75static void *heap_bottom; 76 77static uint64_t 78pc98_loadaddr(u_int type, void *data, uint64_t addr) 79{ 80 struct stat st; 81 82 if (type == LOAD_ELF) 83 return (roundup(addr, PAGE_SIZE)); 84 85 /* We cannot use 15M-16M area on pc98. */ 86 if (type == LOAD_RAW && addr < 0x1000000 && stat(data, &st) == 0 && 87 (st.st_size == -1 || addr + st.st_size > 0xf00000)) 88 addr = 0x1000000; 89 return (addr); 90} 91 92int 93main(void) 94{ 95 int i; 96 97 /* Set machine type to PC98_SYSTEM_PARAMETER. */ 98 set_machine_type(); 99 100 /* Pick up arguments */ 101 kargs = (void *)__args; 102 initial_howto = kargs->howto; 103 initial_bootdev = kargs->bootdev; 104 initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 105 106 /* Initialize the v86 register set to a known-good state. */ 107 bzero(&v86, sizeof(v86)); 108 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 109 110 /* 111 * Initialise the heap as early as possible. Once this is done, malloc() is usable. 112 */ 113 bios_getmem(); 114 115#if defined(LOADER_BZIP2_SUPPORT) 116 if (high_heap_size > 0) { 117 heap_top = PTOV(high_heap_base + high_heap_size); 118 heap_bottom = PTOV(high_heap_base); 119 if (high_heap_base < memtop_copyin) 120 memtop_copyin = high_heap_base; 121 } else 122#endif 123 { 124 heap_top = (void *)PTOV(bios_basemem); 125 heap_bottom = (void *)end; 126 } 127 setheap(heap_bottom, heap_top); 128 129 /* 130 * XXX Chicken-and-egg problem; we want to have console output early, but some 131 * console attributes may depend on reading from eg. the boot device, which we 132 * can't do yet. 133 * 134 * We can use printf() etc. once this is done. 135 * If the previous boot stage has requested a serial console, prefer that. 136 */ 137 bi_setboothowto(initial_howto); 138 if (initial_howto & RB_MULTIPLE) { 139 if (initial_howto & RB_SERIAL) 140 setenv("console", "comconsole vidconsole", 1); 141 else 142 setenv("console", "vidconsole comconsole", 1); 143 } else if (initial_howto & RB_SERIAL) 144 setenv("console", "comconsole", 1); 145 else if (initial_howto & RB_MUTE) 146 setenv("console", "nullconsole", 1); 147 cons_probe(); 148 149 /* 150 * Initialise the block cache 151 */ 152 bcache_init(32, 512); /* 16k cache XXX tune this */ 153 154 /* 155 * Special handling for PXE and CD booting. 156 */ 157 if (kargs->bootinfo == 0) { 158 /* 159 * We only want the PXE disk to try to init itself in the below 160 * walk through devsw if we actually booted off of PXE. 161 */ 162 if (kargs->bootflags & KARGS_FLAGS_PXE) 163 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 164 else if (kargs->bootflags & KARGS_FLAGS_CD) 165 bc_add(initial_bootdev); 166 } 167 168 archsw.arch_autoload = i386_autoload; 169 archsw.arch_getdev = i386_getdev; 170 archsw.arch_copyin = i386_copyin; 171 archsw.arch_copyout = i386_copyout; 172 archsw.arch_readin = i386_readin; 173 archsw.arch_isainb = isa_inb; 174 archsw.arch_isaoutb = isa_outb; 175 archsw.arch_loadaddr = pc98_loadaddr; 176 177 /* 178 * March through the device switch probing for things. 179 */ 180 for (i = 0; devsw[i] != NULL; i++) 181 if (devsw[i]->dv_init != NULL) 182 (devsw[i]->dv_init)(); 183 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 184 if (initial_bootinfo != NULL) { 185 initial_bootinfo->bi_basemem = bios_basemem / 1024; 186 initial_bootinfo->bi_extmem = bios_extmem / 1024; 187 } 188 189 printf("\n"); 190 printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 191 printf("(%s, %s)\n", bootprog_maker, bootprog_date); 192 193 extract_currdev(); /* set $currdev and $loaddev */ 194 setenv("LINES", "24", 1); /* optional */ 195 196 interact(); /* doesn't return */ 197 198 /* if we ever get here, it is an error */ 199 return (1); 200} 201 202/* 203 * Set the 'current device' by (if possible) recovering the boot device as 204 * supplied by the initial bootstrap. 205 * 206 * XXX should be extended for netbooting. 207 */ 208static void 209extract_currdev(void) 210{ 211 struct i386_devdesc new_currdev; 212 int major; 213 int biosdev = -1; 214 215 /* Assume we are booting from a BIOS disk by default */ 216 new_currdev.d_dev = &biosdisk; 217 218 /* new-style boot loaders such as pxeldr and cdldr */ 219 if (kargs->bootinfo == 0) { 220 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 221 /* we are booting from a CD with cdboot */ 222 new_currdev.d_dev = &bioscd; 223 new_currdev.d_unit = bc_bios2unit(initial_bootdev); 224 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 225 /* we are booting from pxeldr */ 226 new_currdev.d_dev = &pxedisk; 227 new_currdev.d_unit = 0; 228 } else { 229 /* we don't know what our boot device is */ 230 new_currdev.d_kind.biosdisk.slice = -1; 231 new_currdev.d_kind.biosdisk.partition = 0; 232 biosdev = -1; 233 } 234 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 235 /* The passed-in boot device is bad */ 236 new_currdev.d_kind.biosdisk.slice = -1; 237 new_currdev.d_kind.biosdisk.partition = 0; 238 biosdev = -1; 239 } else { 240 new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 241 new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 242 biosdev = initial_bootinfo->bi_bios_dev; 243 major = B_TYPE(initial_bootdev); 244 245 /* 246 * If we are booted by an old bootstrap, we have to guess at the BIOS 247 * unit number. We will lose if there is more than one disk type 248 * and we are not booting from the lowest-numbered disk type 249 * (ie. SCSI when IDE also exists). 250 */ 251 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 252 if (B_TYPE(initial_bootdev) == 6) 253 biosdev = 0x30 + B_UNIT(initial_bootdev); 254 else 255 biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 256 } 257 } 258 new_currdev.d_type = new_currdev.d_dev->dv_type; 259 260 /* 261 * If we are booting off of a BIOS disk and we didn't succeed in determining 262 * which one we booted off of, just use disk0: as a reasonable default. 263 */ 264 if ((new_currdev.d_type == biosdisk.dv_type) && 265 ((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) { 266 printf("Can't work out which disk we are booting from.\n" 267 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 268 new_currdev.d_unit = 0; 269 } 270 271 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 272 i386_setcurrdev, env_nounset); 273 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 274 env_nounset); 275} 276 277COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 278 279static int 280command_reboot(int argc, char *argv[]) 281{ 282 int i; 283 284 for (i = 0; devsw[i] != NULL; ++i) 285 if (devsw[i]->dv_cleanup != NULL) 286 (devsw[i]->dv_cleanup)(); 287 288 printf("Rebooting...\n"); 289 delay(1000000); 290 __exit(0); 291} 292 293/* provide this for panic, as it's not in the startup code */ 294void 295exit(int code) 296{ 297 __exit(code); 298} 299 300COMMAND_SET(heap, "heap", "show heap usage", command_heap); 301 302static int 303command_heap(int argc, char *argv[]) 304{ 305 mallocstats(); 306 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 307 sbrk(0), heap_top); 308 return(CMD_OK); 309} 310 311/* ISA bus access functions for PnP. */ 312static int 313isa_inb(int port) 314{ 315 316 return (inb(port)); 317} 318 319static void 320isa_outb(int port, int value) 321{ 322 323 outb(port, value); 324} 325