main.c revision 59167
185556Siwasaki/*- 285556Siwasaki * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 385556Siwasaki * All rights reserved. 485556Siwasaki * 585556Siwasaki * Redistribution and use in source and binary forms, with or without 685556Siwasaki * modification, are permitted provided that the following conditions 785556Siwasaki * are met: 885556Siwasaki * 1. Redistributions of source code must retain the above copyright 985556Siwasaki * notice, this list of conditions and the following disclaimer. 1085556Siwasaki * 2. Redistributions in binary form must reproduce the above copyright 1185556Siwasaki * notice, this list of conditions and the following disclaimer in the 1285556Siwasaki * documentation and/or other materials provided with the distribution. 1385556Siwasaki * 1485556Siwasaki * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1585556Siwasaki * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1685556Siwasaki * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1785556Siwasaki * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1885556Siwasaki * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1985556Siwasaki * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2085556Siwasaki * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2185556Siwasaki * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2285556Siwasaki * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2385556Siwasaki * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2485556Siwasaki * SUCH DAMAGE. 2585556Siwasaki * 2685556Siwasaki * $FreeBSD: head/sys/boot/pc98/loader/main.c 59167 2000-04-12 11:17:08Z kato $ 27115681Sobrien */ 28115681Sobrien 29115681Sobrien/* 3085556Siwasaki * MD bootstrap main() and assorted miscellaneous 3185556Siwasaki * commands. 32168191Sjhb */ 3385556Siwasaki 3485556Siwasaki#include <stand.h> 35215097Sjkim#include <string.h> 36170976Snjl#include <machine/bootinfo.h> 37170976Snjl#include <sys/reboot.h> 3885556Siwasaki 3985556Siwasaki#include "bootstrap.h" 40193530Sjkim#include "libi386/libi386.h" 41193530Sjkim#include "btxv86.h" 4285556Siwasaki 4385556Siwasaki#define KARGS_FLAGS_CD 0x1 4485556Siwasaki#define KARGS_FLAGS_PXE 0x2 45215072Sjkim 46177157Sjhb/* Arguments passed in from the boot1/boot2 loader */ 4785556Siwasakistatic struct 4885556Siwasaki{ 4985556Siwasaki u_int32_t howto; 5085556Siwasaki u_int32_t bootdev; 51215072Sjkim u_int32_t bootflags; 5285556Siwasaki u_int32_t pxeinfo; 53132619Snjl u_int32_t res2; 54170976Snjl u_int32_t bootinfo; 5585556Siwasaki} *kargs; 56170976Snjl 5785556Siwasakistatic u_int32_t initial_howto; 58170976Snjlstatic u_int32_t initial_bootdev; 59170976Snjlstatic struct bootinfo *initial_bootinfo; 60170976Snjl 61170976Snjlstruct arch_switch archsw; /* MI/MD interface boundary */ 62170976Snjl 63170976Snjlstatic void extract_currdev(void); 64170976Snjlstatic int isa_inb(int port); 65170976Snjlstatic void isa_outb(int port, int value); 66197134Srwatson 67197134Srwatson/* from vers.c */ 68197134Srwatsonextern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 69197134Srwatson 70197134Srwatson/* XXX debugging */ 71170976Snjlextern char end[]; 7285556Siwasaki 73126080Sphk/* XXX - I dont know why we have to do this, but it helps. */ 74179726Sed#if defined(LOADER_NFS_SUPPORT) || defined(LOADER_TFTP_SUPPORT) 75111815Sphkchar Heap[200*1024]; 76111815Sphk#endif 77111815Sphk 78111815Sphkvoid 79111815Sphkmain(void) 80111815Sphk{ 81170976Snjl int i; 8285556Siwasaki 8385556Siwasaki /* Pick up arguments */ 8485556Siwasaki kargs = (void *)__args; 8585556Siwasaki initial_howto = kargs->howto; 8685556Siwasaki initial_bootdev = kargs->bootdev; 8785556Siwasaki initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 8885556Siwasaki 89131218Simp /* 9085556Siwasaki * Initialise the heap as early as possible. Once this is done, malloc() is usable. 9185556Siwasaki */ 92119530Snjl bios_getmem(); 9385556Siwasaki 94119530Snjl /* XXX - I dont know why we have to do this, but it helps PXE. */ 9585556Siwasaki#if defined(LOADER_NFS_SUPPORT) || defined(LOADER_TFTP_SUPPORT) 9685556Siwasaki setheap(Heap, Heap+sizeof(Heap)); 97119530Snjl#else 9885556Siwasaki setheap((void *)end, (void *)bios_basemem); 99119530Snjl#endif 10085556Siwasaki 101119530Snjl /* 102120156Siwasaki * XXX Chicken-and-egg problem; we want to have console output early, but some 103131218Simp * console attributes may depend on reading from eg. the boot device, which we 104128975Snjl * can't do yet. 105120156Siwasaki * 106128975Snjl * We can use printf() etc. once this is done. 107120156Siwasaki * If the previous boot stage has requested a serial console, prefer that. 108120156Siwasaki */ 109120156Siwasaki if (initial_howto & RB_SERIAL) 11085556Siwasaki setenv("console", "comconsole", 1); 11185556Siwasaki cons_probe(); 11285556Siwasaki 11385556Siwasaki /* 11485556Siwasaki * Initialise the block cache 11585556Siwasaki */ 11685556Siwasaki bcache_init(32, 512); /* 16k cache XXX tune this */ 11785556Siwasaki 11885556Siwasaki /* 11985556Siwasaki * We only want the PXE disk to try to init itself in the below walk through 120128975Snjl * devsw if we actually booted off of PXE. 12185556Siwasaki */ 122128975Snjl if((kargs->bootinfo == NULL) && 123119530Snjl ((kargs->bootflags & KARGS_FLAGS_PXE) != 0)) { 12485556Siwasaki pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 125119530Snjl } 12685556Siwasaki 12785556Siwasaki /* 128119530Snjl * March through the device switch probing for things. 12985556Siwasaki */ 130119530Snjl for (i = 0; devsw[i] != NULL; i++) 13185556Siwasaki if (devsw[i]->dv_init != NULL) 13285556Siwasaki (devsw[i]->dv_init)(); 13385556Siwasaki printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 13485556Siwasaki 13585556Siwasaki printf("\n"); 13685556Siwasaki printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 13785556Siwasaki printf("(%s, %s)\n", bootprog_maker, bootprog_date); 13885556Siwasaki 13985556Siwasaki extract_currdev(); /* set $currdev and $loaddev */ 14085556Siwasaki setenv("LINES", "24", 1); /* optional */ 14185556Siwasaki 14285556Siwasaki archsw.arch_autoload = i386_autoload; 14385556Siwasaki archsw.arch_getdev = i386_getdev; 14485556Siwasaki archsw.arch_copyin = i386_copyin; 145132619Snjl archsw.arch_copyout = i386_copyout; 146131218Simp archsw.arch_readin = i386_readin; 14785556Siwasaki archsw.arch_isainb = isa_inb; 148119530Snjl archsw.arch_isaoutb = isa_outb; 149131218Simp 150119530Snjl interact(); /* doesn't return */ 15185556Siwasaki} 15285556Siwasaki 153148352Snjl/* 154131218Simp * Set the 'current device' by (if possible) recovering the boot device as 155131218Simp * supplied by the initial bootstrap. 156131218Simp * 157131218Simp * XXX should be extended for netbooting. 15885556Siwasaki */ 15985556Siwasakistatic void 16085556Siwasakiextract_currdev(void) 16185556Siwasaki{ 16285556Siwasaki struct i386_devdesc currdev; 16385556Siwasaki int major, biosdev; 16485556Siwasaki 16585556Siwasaki /* Assume we are booting from a BIOS disk by default */ 16685556Siwasaki currdev.d_dev = &biosdisk; 16785556Siwasaki currdev.d_type = currdev.d_dev->dv_type; 16885556Siwasaki 16985556Siwasaki /* new-style boot loaders such as pxeldr and cdldr */ 17085556Siwasaki if (kargs->bootinfo == NULL) { 171148352Snjl if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 172148352Snjl /* we are booting from a CD with cdldr */ 17385556Siwasaki currdev.d_kind.biosdisk.slice = -1; 17485556Siwasaki currdev.d_kind.biosdisk.partition = 0; 17585556Siwasaki biosdev = initial_bootdev; 176128975Snjl } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 17785556Siwasaki /* we are booting from pxeldr */ 17885556Siwasaki currdev.d_dev = &pxedisk; 179119530Snjl currdev.d_type = currdev.d_dev->dv_type; 180148352Snjl currdev.d_kind.netif.unit = 0; 181148352Snjl } else { 182148352Snjl /* we don't know what our boot device is */ 183148352Snjl currdev.d_kind.biosdisk.slice = -1; 184148352Snjl currdev.d_kind.biosdisk.partition = 0; 185148352Snjl biosdev = -1; 186148352Snjl } 187148352Snjl } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 188148352Snjl /* The passed-in boot device is bad */ 189148352Snjl currdev.d_kind.biosdisk.slice = -1; 19085556Siwasaki currdev.d_kind.biosdisk.partition = 0; 19185556Siwasaki biosdev = -1; 19285556Siwasaki } else { 19385556Siwasaki currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) + 19485556Siwasaki B_CONTROLLER(initial_bootdev) - 1; 19585556Siwasaki currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 19685556Siwasaki biosdev = initial_bootinfo->bi_bios_dev; 197119530Snjl major = B_TYPE(initial_bootdev); 198131218Simp 199119530Snjl /* 20085556Siwasaki * If we are booted by an old bootstrap, we have to guess at the BIOS 20185556Siwasaki * unit number. We will loose if there is more than one disk type 20285556Siwasaki * and we are not booting from the lowest-numbered disk type 20385556Siwasaki * (ie. SCSI when IDE also exists). 20485556Siwasaki */ 205170976Snjl#ifdef PC98 206170976Snjl if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */ 207170976Snjl if (B_TYPE(initial_bootdev) == 6) 208170976Snjl biosdev = 0x30 + B_UNIT(initial_bootdev); 209170976Snjl else 210170976Snjl biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev); 211170976Snjl } 212170976Snjl#else 213170976Snjl if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 214170976Snjl biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 215170976Snjl#endif 216170976Snjl } 217170976Snjl 218170976Snjl /* 219170976Snjl * If we are booting off of a BIOS disk and we didn't succeed in determining 220170976Snjl * which one we booted off of, just use disk0: as a reasonable default. 221170976Snjl */ 222170976Snjl if ((currdev.d_type == devsw[0]->dv_type) && 223170976Snjl ((currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1)) { 224170976Snjl printf("Can't work out which disk we are booting from.\n" 225183381Sed "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 226170976Snjl currdev.d_kind.biosdisk.unit = 0; 227170976Snjl } 228183381Sed env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset); 229170976Snjl env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset); 230170976Snjl} 231170976Snjl 232170976SnjlCOMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 233170976Snjl 234170976Snjlstatic int 235170976Snjlcommand_reboot(int argc, char *argv[]) 236170976Snjl{ 237170976Snjl 238170976Snjl printf("Rebooting...\n"); 239170976Snjl delay(1000000); 240170976Snjl __exit(0); 241170976Snjl} 242170976Snjl 243170976Snjl/* provide this for panic, as it's not in the startup code */ 244170976Snjlvoid 245170976Snjlexit(int code) 246170976Snjl{ 247170976Snjl __exit(code); 248170976Snjl} 249193951Skib 250170976SnjlCOMMAND_SET(heap, "heap", "show heap usage", command_heap); 251170976Snjl 252170976Snjlstatic int 253170976Snjlcommand_heap(int argc, char *argv[]) 254170976Snjl{ 255170976Snjl mallocstats(); 256170976Snjl printf("heap base at %p, top at %p\n", end, sbrk(0)); 257170976Snjl return(CMD_OK); 258170976Snjl} 259170976Snjl 260170976Snjl/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */ 261170976Snjlstatic int 262170976Snjlisa_inb(int port) 263170976Snjl{ 264170976Snjl u_char data; 265170976Snjl 26685556Siwasaki if (__builtin_constant_p(port) && 267192442Simp (((port) & 0xffff) < 0x100) && 26885556Siwasaki ((port) < 0x10000)) { 269170976Snjl __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); 270170976Snjl } else { 271170976Snjl __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 272170976Snjl } 273170976Snjl return(data); 274170976Snjl} 275170976Snjl 276170976Snjlstatic void 277170976Snjlisa_outb(int port, int value) 278170976Snjl{ 279170976Snjl u_char al = value; 28085556Siwasaki 28185556Siwasaki if (__builtin_constant_p(port) && 28285556Siwasaki (((port) & 0xffff) < 0x100) && 28385556Siwasaki ((port) < 0x10000)) { 284192442Simp __asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port))); 28585556Siwasaki } else { 286170976Snjl __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 287170976Snjl } 288170976Snjl} 289170976Snjl 290170976Snjl