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: stable/11/stand/pc98/loader/main.c 344290 2019-02-19 18:48:17Z kevans $"); 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/* XXX debugging */ 69extern char end[]; 70 71static void *heap_top; 72static void *heap_bottom; 73 74static uint64_t 75pc98_loadaddr(u_int type, void *data, uint64_t addr) 76{ 77 struct stat st; 78 79 if (type == LOAD_ELF) 80 return (roundup(addr, PAGE_SIZE)); 81 82 /* We cannot use 15M-16M area on pc98. */ 83 if (type == LOAD_RAW && addr < 0x1000000 && stat(data, &st) == 0 && 84 (st.st_size == -1 || addr + st.st_size > 0xf00000)) 85 addr = 0x1000000; 86 return (addr); 87} 88 89int 90main(void) 91{ 92 int i; 93 94 /* Set machine type to PC98_SYSTEM_PARAMETER. */ 95 set_machine_type(); 96 97 /* Pick up arguments */ 98 kargs = (void *)__args; 99 initial_howto = kargs->howto; 100 initial_bootdev = kargs->bootdev; 101 initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 102 103 /* Initialize the v86 register set to a known-good state. */ 104 bzero(&v86, sizeof(v86)); 105 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 106 107 /* 108 * Initialise the heap as early as possible. Once this is done, malloc() is usable. 109 */ 110 bios_getmem(); 111 112#if defined(LOADER_BZIP2_SUPPORT) 113 if (high_heap_size > 0) { 114 heap_top = PTOV(high_heap_base + high_heap_size); 115 heap_bottom = PTOV(high_heap_base); 116 if (high_heap_base < memtop_copyin) 117 memtop_copyin = high_heap_base; 118 } else 119#endif 120 { 121 heap_top = (void *)PTOV(bios_basemem); 122 heap_bottom = (void *)end; 123 } 124 setheap(heap_bottom, heap_top); 125 126 /* 127 * XXX Chicken-and-egg problem; we want to have console output early, but some 128 * console attributes may depend on reading from eg. the boot device, which we 129 * can't do yet. 130 * 131 * We can use printf() etc. once this is done. 132 * If the previous boot stage has requested a serial console, prefer that. 133 */ 134 bi_setboothowto(initial_howto); 135 if (initial_howto & RB_MULTIPLE) { 136 if (initial_howto & RB_SERIAL) 137 setenv("console", "comconsole vidconsole", 1); 138 else 139 setenv("console", "vidconsole comconsole", 1); 140 } else if (initial_howto & RB_SERIAL) 141 setenv("console", "comconsole", 1); 142 else if (initial_howto & RB_MUTE) 143 setenv("console", "nullconsole", 1); 144 cons_probe(); 145 146 /* 147 * Initialise the block cache. Set the upper limit. 148 */ 149 bcache_init(32768, 512); 150 151 /* 152 * Special handling for PXE and CD booting. 153 */ 154 if (kargs->bootinfo == 0) { 155 /* 156 * We only want the PXE disk to try to init itself in the below 157 * walk through devsw if we actually booted off of PXE. 158 */ 159 if (kargs->bootflags & KARGS_FLAGS_PXE) 160 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 161 else if (kargs->bootflags & KARGS_FLAGS_CD) 162 bc_add(initial_bootdev); 163 } 164 165 archsw.arch_autoload = i386_autoload; 166 archsw.arch_getdev = i386_getdev; 167 archsw.arch_copyin = i386_copyin; 168 archsw.arch_copyout = i386_copyout; 169 archsw.arch_readin = i386_readin; 170 archsw.arch_isainb = isa_inb; 171 archsw.arch_isaoutb = isa_outb; 172 archsw.arch_loadaddr = pc98_loadaddr; 173 174 /* 175 * March through the device switch probing for things. 176 */ 177 for (i = 0; devsw[i] != NULL; i++) 178 if (devsw[i]->dv_init != NULL) 179 (devsw[i]->dv_init)(); 180 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 181 if (initial_bootinfo != NULL) { 182 initial_bootinfo->bi_basemem = bios_basemem / 1024; 183 initial_bootinfo->bi_extmem = bios_extmem / 1024; 184 } 185 186 printf("\n%s", bootprog_info); 187 188 extract_currdev(); /* set $currdev and $loaddev */ 189 setenv("LINES", "24", 1); /* optional */ 190 191 interact(); /* doesn't return */ 192 193 /* if we ever get here, it is an error */ 194 return (1); 195} 196 197/* 198 * Set the 'current device' by (if possible) recovering the boot device as 199 * supplied by the initial bootstrap. 200 * 201 * XXX should be extended for netbooting. 202 */ 203static void 204extract_currdev(void) 205{ 206 struct i386_devdesc new_currdev; 207 int major; 208 int biosdev = -1; 209 210 /* Assume we are booting from a BIOS disk by default */ 211 new_currdev.dd.d_dev = &biosdisk; 212 213 /* new-style boot loaders such as pxeldr and cdldr */ 214 if (kargs->bootinfo == 0) { 215 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 216 /* we are booting from a CD with cdboot */ 217 new_currdev.dd.d_dev = &bioscd; 218 new_currdev.dd.d_unit = bc_bios2unit(initial_bootdev); 219 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 220 /* we are booting from pxeldr */ 221 new_currdev.dd.d_dev = &pxedisk; 222 new_currdev.dd.d_unit = 0; 223 } else { 224 /* we don't know what our boot device is */ 225 new_currdev.d_kind.biosdisk.slice = -1; 226 new_currdev.d_kind.biosdisk.partition = 0; 227 biosdev = -1; 228 } 229 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 230 /* The passed-in boot device is bad */ 231 new_currdev.d_kind.biosdisk.slice = -1; 232 new_currdev.d_kind.biosdisk.partition = 0; 233 biosdev = -1; 234 } else { 235 new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 236 new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 237 biosdev = initial_bootinfo->bi_bios_dev; 238 major = B_TYPE(initial_bootdev); 239 240 /* 241 * If we are booted by an old bootstrap, we have to guess at the BIOS 242 * unit number. We will lose if there is more than one disk type 243 * and we are not booting from the lowest-numbered disk type 244 * (ie. SCSI when IDE also exists). 245 */ 246 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 247 if (B_TYPE(initial_bootdev) == 6) 248 biosdev = 0x30 + B_UNIT(initial_bootdev); 249 else 250 biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 251 } 252 } 253 254 /* 255 * If we are booting off of a BIOS disk and we didn't succeed in determining 256 * which one we booted off of, just use disk0: as a reasonable default. 257 */ 258 if ((new_currdev.dd.d_dev->dv_type == biosdisk.dv_type) && 259 ((new_currdev.dd.d_unit = bd_bios2unit(biosdev)) == -1)) { 260 printf("Can't work out which disk we are booting from.\n" 261 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 262 new_currdev.dd.d_unit = 0; 263 } 264 265 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 266 i386_setcurrdev, env_nounset); 267 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 268 env_nounset); 269} 270 271COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 272 273static int 274command_reboot(int argc, char *argv[]) 275{ 276 int i; 277 278 for (i = 0; devsw[i] != NULL; ++i) 279 if (devsw[i]->dv_cleanup != NULL) 280 (devsw[i]->dv_cleanup)(); 281 282 printf("Rebooting...\n"); 283 delay(1000000); 284 __exit(0); 285} 286 287/* provide this for panic, as it's not in the startup code */ 288void 289exit(int code) 290{ 291 __exit(code); 292} 293 294COMMAND_SET(heap, "heap", "show heap usage", command_heap); 295 296static int 297command_heap(int argc, char *argv[]) 298{ 299 mallocstats(); 300 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 301 sbrk(0), heap_top); 302 return(CMD_OK); 303} 304 305/* ISA bus access functions for PnP. */ 306static int 307isa_inb(int port) 308{ 309 310 return (inb(port)); 311} 312 313static void 314isa_outb(int port, int value) 315{ 316 317 outb(port, value); 318} 319