main.c revision 240854
1234285Sdim/*- 2234285Sdim * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3234285Sdim * All rights reserved. 4234285Sdim * 5234285Sdim * Redistribution and use in source and binary forms, with or without 6234285Sdim * modification, are permitted provided that the following conditions 7234285Sdim * are met: 8234285Sdim * 1. Redistributions of source code must retain the above copyright 9234285Sdim * notice, this list of conditions and the following disclaimer. 10234285Sdim * 2. Redistributions in binary form must reproduce the above copyright 11234285Sdim * notice, this list of conditions and the following disclaimer in the 12234285Sdim * documentation and/or other materials provided with the distribution. 13234285Sdim * 14234285Sdim * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15234285Sdim * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16234285Sdim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17234285Sdim * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18234285Sdim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19234285Sdim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20234285Sdim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21234285Sdim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22249423Sdim * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23234285Sdim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24249423Sdim * SUCH DAMAGE. 25249423Sdim */ 26249423Sdim 27234285Sdim#include <sys/cdefs.h> 28234285Sdim__FBSDID("$FreeBSD: head/sys/boot/pc98/loader/main.c 240854 2012-09-23 08:50:54Z nyan $"); 29234285Sdim 30234285Sdim/* 31234285Sdim * MD bootstrap main() and assorted miscellaneous 32234285Sdim * commands. 33249423Sdim */ 34249423Sdim 35249423Sdim#include <stand.h> 36249423Sdim#include <stddef.h> 37249423Sdim#include <string.h> 38234285Sdim#include <machine/bootinfo.h> 39234285Sdim#include <machine/cpufunc.h> 40234285Sdim#include <sys/param.h> 41234285Sdim#include <sys/reboot.h> 42234285Sdim 43234285Sdim#include "bootstrap.h" 44234285Sdim#include "common/bootargs.h" 45234285Sdim#include "libi386/libi386.h" 46249423Sdim#include "libpc98/libpc98.h" 47234285Sdim#include "btxv86.h" 48234285Sdim 49249423SdimCTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE); 50249423SdimCTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO); 51234285SdimCTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS); 52234285SdimCTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE); 53249423Sdim 54234285Sdim/* Arguments passed in from the boot1/boot2 loader */ 55249423Sdimstatic struct bootargs *kargs; 56234285Sdim 57234285Sdimstatic u_int32_t initial_howto; 58234285Sdimstatic u_int32_t initial_bootdev; 59234285Sdimstatic struct bootinfo *initial_bootinfo; 60234285Sdim 61234285Sdimstruct arch_switch archsw; /* MI/MD interface boundary */ 62234285Sdim 63234285Sdimstatic void extract_currdev(void); 64234285Sdimstatic int isa_inb(int port); 65234285Sdimstatic void isa_outb(int port, int value); 66234285Sdimvoid exit(int code); 67234285Sdim 68234285Sdim/* from vers.c */ 69234285Sdimextern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 70234285Sdim 71234285Sdim/* XXX debugging */ 72234285Sdimextern char end[]; 73234285Sdim 74234285Sdimstatic void *heap_top; 75234285Sdimstatic void *heap_bottom; 76234285Sdim 77234285Sdimstatic uint64_t 78234285Sdimpc98_loadaddr(u_int type, void *data, uint64_t addr) 79234285Sdim{ 80239462Sdim struct stat st; 81234285Sdim 82234285Sdim if (type == LOAD_ELF) 83234285Sdim return (roundup(addr, PAGE_SIZE)); 84234285Sdim 85234285Sdim /* We cannot use 15M-16M area on pc98. */ 86234285Sdim if (type == LOAD_RAW && addr < 0x1000000 && stat(data, &st) == 0 && 87234285Sdim (st.st_size == -1 || addr + st.st_size > 0xf00000)) 88234285Sdim addr = 0x1000000; 89234285Sdim return (addr); 90234285Sdim} 91234285Sdim 92234285Sdimint 93234285Sdimmain(void) 94234285Sdim{ 95234285Sdim int i; 96234285Sdim 97234285Sdim /* Set machine type to PC98_SYSTEM_PARAMETER. */ 98234285Sdim set_machine_type(); 99234285Sdim 100234285Sdim /* Pick up arguments */ 101234285Sdim kargs = (void *)__args; 102263508Sdim initial_howto = kargs->howto; 103234285Sdim initial_bootdev = kargs->bootdev; 104234285Sdim initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 105234285Sdim 106234285Sdim /* Initialize the v86 register set to a known-good state. */ 107234285Sdim bzero(&v86, sizeof(v86)); 108234285Sdim v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 109234285Sdim 110234285Sdim /* 111234285Sdim * Initialise the heap as early as possible. Once this is done, malloc() is usable. 112234285Sdim */ 113234285Sdim bios_getmem(); 114234285Sdim 115234285Sdim#if defined(LOADER_BZIP2_SUPPORT) 116234285Sdim if (high_heap_size > 0) { 117234285Sdim heap_top = PTOV(high_heap_base + high_heap_size); 118234285Sdim heap_bottom = PTOV(high_heap_base); 119234285Sdim if (high_heap_base < memtop_copyin) 120234285Sdim memtop_copyin = high_heap_base; 121234285Sdim } else 122234285Sdim#endif 123234285Sdim { 124234285Sdim heap_top = (void *)PTOV(bios_basemem); 125234285Sdim heap_bottom = (void *)end; 126234285Sdim } 127234285Sdim setheap(heap_bottom, heap_top); 128234285Sdim 129234285Sdim /* 130234285Sdim * XXX Chicken-and-egg problem; we want to have console output early, but some 131234285Sdim * console attributes may depend on reading from eg. the boot device, which we 132234285Sdim * can't do yet. 133234285Sdim * 134234285Sdim * We can use printf() etc. once this is done. 135234285Sdim * If the previous boot stage has requested a serial console, prefer that. 136239462Sdim */ 137239462Sdim bi_setboothowto(initial_howto); 138239462Sdim if (initial_howto & RB_MULTIPLE) { 139234285Sdim if (initial_howto & RB_SERIAL) 140234285Sdim setenv("console", "comconsole vidconsole", 1); 141234285Sdim else 142234285Sdim setenv("console", "vidconsole comconsole", 1); 143234285Sdim } else if (initial_howto & RB_SERIAL) 144234285Sdim setenv("console", "comconsole", 1); 145234285Sdim else if (initial_howto & RB_MUTE) 146234285Sdim setenv("console", "nullconsole", 1); 147234285Sdim cons_probe(); 148234285Sdim 149234285Sdim /* 150234285Sdim * Initialise the block cache 151234285Sdim */ 152234285Sdim bcache_init(32, 512); /* 16k cache XXX tune this */ 153234285Sdim 154234285Sdim /* 155234285Sdim * Special handling for PXE and CD booting. 156234285Sdim */ 157234285Sdim if (kargs->bootinfo == 0) { 158234285Sdim /* 159234285Sdim * We only want the PXE disk to try to init itself in the below 160234285Sdim * walk through devsw if we actually booted off of PXE. 161234285Sdim */ 162234285Sdim if (kargs->bootflags & KARGS_FLAGS_PXE) 163234285Sdim pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 164234285Sdim else if (kargs->bootflags & KARGS_FLAGS_CD) 165234285Sdim bc_add(initial_bootdev); 166234285Sdim } 167234285Sdim 168234285Sdim archsw.arch_autoload = i386_autoload; 169234285Sdim archsw.arch_getdev = i386_getdev; 170234285Sdim archsw.arch_copyin = i386_copyin; 171234285Sdim archsw.arch_copyout = i386_copyout; 172234285Sdim archsw.arch_readin = i386_readin; 173234285Sdim archsw.arch_isainb = isa_inb; 174234285Sdim archsw.arch_isaoutb = isa_outb; 175234285Sdim archsw.arch_loadaddr = pc98_loadaddr; 176234285Sdim 177234285Sdim /* 178234285Sdim * March through the device switch probing for things. 179234285Sdim */ 180234285Sdim for (i = 0; devsw[i] != NULL; i++) 181234285Sdim if (devsw[i]->dv_init != NULL) 182234285Sdim (devsw[i]->dv_init)(); 183234285Sdim printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 184234285Sdim if (initial_bootinfo != NULL) { 185234285Sdim initial_bootinfo->bi_basemem = bios_basemem / 1024; 186234285Sdim initial_bootinfo->bi_extmem = bios_extmem / 1024; 187234285Sdim } 188234285Sdim 189234285Sdim printf("\n"); 190234285Sdim printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 191234285Sdim printf("(%s, %s)\n", bootprog_maker, bootprog_date); 192234285Sdim 193234285Sdim extract_currdev(); /* set $currdev and $loaddev */ 194234285Sdim setenv("LINES", "24", 1); /* optional */ 195234285Sdim 196234285Sdim interact(); /* doesn't return */ 197234285Sdim 198234285Sdim /* if we ever get here, it is an error */ 199234285Sdim return (1); 200239462Sdim} 201239462Sdim 202234285Sdim/* 203239462Sdim * Set the 'current device' by (if possible) recovering the boot device as 204239462Sdim * supplied by the initial bootstrap. 205239462Sdim * 206239462Sdim * XXX should be extended for netbooting. 207239462Sdim */ 208239462Sdimstatic void 209239462Sdimextract_currdev(void) 210239462Sdim{ 211239462Sdim struct i386_devdesc new_currdev; 212239462Sdim int major; 213239462Sdim int biosdev = -1; 214239462Sdim 215239462Sdim /* Assume we are booting from a BIOS disk by default */ 216239462Sdim new_currdev.d_dev = &biosdisk; 217239462Sdim 218239462Sdim /* new-style boot loaders such as pxeldr and cdldr */ 219239462Sdim if (kargs->bootinfo == 0) { 220239462Sdim if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 221239462Sdim /* we are booting from a CD with cdboot */ 222239462Sdim new_currdev.d_dev = &bioscd; 223249423Sdim new_currdev.d_unit = bc_bios2unit(initial_bootdev); 224249423Sdim } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 225234285Sdim /* we are booting from pxeldr */ 226239462Sdim new_currdev.d_dev = &pxedisk; 227239462Sdim new_currdev.d_unit = 0; 228239462Sdim } else { 229239462Sdim /* we don't know what our boot device is */ 230239462Sdim new_currdev.d_kind.biosdisk.slice = -1; 231239462Sdim new_currdev.d_kind.biosdisk.partition = 0; 232239462Sdim biosdev = -1; 233249423Sdim } 234249423Sdim } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 235239462Sdim /* The passed-in boot device is bad */ 236239462Sdim new_currdev.d_kind.biosdisk.slice = -1; 237239462Sdim new_currdev.d_kind.biosdisk.partition = 0; 238239462Sdim biosdev = -1; 239239462Sdim } else { 240234285Sdim new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 241234285Sdim new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 242234285Sdim biosdev = initial_bootinfo->bi_bios_dev; 243234285Sdim major = B_TYPE(initial_bootdev); 244234285Sdim 245234285Sdim /* 246234285Sdim * If we are booted by an old bootstrap, we have to guess at the BIOS 247234285Sdim * unit number. We will lose if there is more than one disk type 248234285Sdim * and we are not booting from the lowest-numbered disk type 249234285Sdim * (ie. SCSI when IDE also exists). 250234285Sdim */ 251234285Sdim if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 252234285Sdim if (B_TYPE(initial_bootdev) == 6) 253234285Sdim biosdev = 0x30 + B_UNIT(initial_bootdev); 254234285Sdim else 255234285Sdim biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 256234285Sdim } 257234285Sdim } 258234285Sdim new_currdev.d_type = new_currdev.d_dev->dv_type; 259234285Sdim 260234285Sdim /* 261234285Sdim * If we are booting off of a BIOS disk and we didn't succeed in determining 262234285Sdim * which one we booted off of, just use disk0: as a reasonable default. 263234285Sdim */ 264234285Sdim if ((new_currdev.d_type == biosdisk.dv_type) && 265234285Sdim ((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) { 266234285Sdim printf("Can't work out which disk we are booting from.\n" 267234285Sdim "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 268234285Sdim new_currdev.d_unit = 0; 269234285Sdim } 270263508Sdim 271234285Sdim env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 272234285Sdim i386_setcurrdev, env_nounset); 273234285Sdim env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 274234285Sdim env_nounset); 275234285Sdim} 276234285Sdim 277234285SdimCOMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 278234285Sdim 279234285Sdimstatic int 280239462Sdimcommand_reboot(int argc, char *argv[]) 281239462Sdim{ 282234285Sdim int i; 283234285Sdim 284234285Sdim for (i = 0; devsw[i] != NULL; ++i) 285234285Sdim if (devsw[i]->dv_cleanup != NULL) 286234285Sdim (devsw[i]->dv_cleanup)(); 287234285Sdim 288239462Sdim printf("Rebooting...\n"); 289234285Sdim delay(1000000); 290234285Sdim __exit(0); 291234982Sdim} 292234285Sdim 293234285Sdim/* provide this for panic, as it's not in the startup code */ 294234285Sdimvoid 295234285Sdimexit(int code) 296234285Sdim{ 297234285Sdim __exit(code); 298234285Sdim} 299234285Sdim 300234285SdimCOMMAND_SET(heap, "heap", "show heap usage", command_heap); 301234285Sdim 302234285Sdimstatic int 303234285Sdimcommand_heap(int argc, char *argv[]) 304234285Sdim{ 305234285Sdim mallocstats(); 306234285Sdim printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 307234285Sdim sbrk(0), heap_top); 308234285Sdim return(CMD_OK); 309234285Sdim} 310234285Sdim 311234285Sdim/* ISA bus access functions for PnP. */ 312234285Sdimstatic int 313234285Sdimisa_inb(int port) 314234285Sdim{ 315 316 return (inb(port)); 317} 318 319static void 320isa_outb(int port, int value) 321{ 322 323 outb(port, value); 324} 325