f42743371e
Many recent machine have a broken INT 12H (Get base memory size) implementation and boot program stops if INT 12H is called. This commit should solve the problem at very first step of FreeBSD installation occurred on newer some machines. Reviewed by: bde, jhb MFC after: 1 week
294 lines
8.7 KiB
C
294 lines
8.7 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* MD bootstrap main() and assorted miscellaneous
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* commands.
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*/
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#include <stand.h>
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#include <string.h>
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#include <machine/bootinfo.h>
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#include <sys/reboot.h>
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#include "bootstrap.h"
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#include "libi386/libi386.h"
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#include "btxv86.h"
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#define KARGS_FLAGS_CD 0x1
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#define KARGS_FLAGS_PXE 0x2
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/* Arguments passed in from the boot1/boot2 loader */
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static struct
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{
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u_int32_t howto;
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u_int32_t bootdev;
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u_int32_t bootflags;
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u_int32_t pxeinfo;
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u_int32_t res2;
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u_int32_t bootinfo;
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} *kargs;
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static u_int32_t initial_howto;
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static u_int32_t initial_bootdev;
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static struct bootinfo *initial_bootinfo;
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struct arch_switch archsw; /* MI/MD interface boundary */
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static void extract_currdev(void);
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static int isa_inb(int port);
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static void isa_outb(int port, int value);
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void exit(int code);
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/* from vers.c */
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extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[];
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/* XXX debugging */
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extern char end[];
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int
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main(void)
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{
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int i;
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/* Pick up arguments */
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kargs = (void *)__args;
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initial_howto = kargs->howto;
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initial_bootdev = kargs->bootdev;
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initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL;
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/*
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* Initialise the heap as early as possible. Once this is done, malloc() is usable.
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*/
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bios_getmem();
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setheap((void *)end, (void *)bios_basemem);
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/*
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* XXX Chicken-and-egg problem; we want to have console output early, but some
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* console attributes may depend on reading from eg. the boot device, which we
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* can't do yet.
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*
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* We can use printf() etc. once this is done.
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* If the previous boot stage has requested a serial console, prefer that.
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*/
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if (initial_howto & RB_SERIAL)
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setenv("console", "comconsole", 1);
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if (initial_howto & RB_MUTE)
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setenv("console", "nullconsole", 1);
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cons_probe();
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/*
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* Initialise the block cache
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*/
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bcache_init(32, 512); /* 16k cache XXX tune this */
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/*
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* Special handling for PXE and CD booting.
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*/
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if (kargs->bootinfo == NULL) {
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/*
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* We only want the PXE disk to try to init itself in the below
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* walk through devsw if we actually booted off of PXE.
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*/
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if (kargs->bootflags & KARGS_FLAGS_PXE)
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pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL);
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else if (kargs->bootflags & KARGS_FLAGS_CD)
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bc_add(initial_bootdev);
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}
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/*
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* March through the device switch probing for things.
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*/
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for (i = 0; devsw[i] != NULL; i++)
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if (devsw[i]->dv_init != NULL)
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(devsw[i]->dv_init)();
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printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024);
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if (initial_bootinfo != NULL) {
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initial_bootinfo->bi_basemem = bios_basemem / 1024;
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initial_bootinfo->bi_extmem = bios_extmem / 1024;
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}
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/* detect ACPI for future reference */
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biosacpi_detect();
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printf("\n");
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printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
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printf("(%s, %s)\n", bootprog_maker, bootprog_date);
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extract_currdev(); /* set $currdev and $loaddev */
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setenv("LINES", "24", 1); /* optional */
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archsw.arch_autoload = i386_autoload;
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archsw.arch_getdev = i386_getdev;
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archsw.arch_copyin = i386_copyin;
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archsw.arch_copyout = i386_copyout;
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archsw.arch_readin = i386_readin;
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archsw.arch_isainb = isa_inb;
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archsw.arch_isaoutb = isa_outb;
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interact(); /* doesn't return */
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/* if we ever get here, it is an error */
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return (1);
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}
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/*
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* Set the 'current device' by (if possible) recovering the boot device as
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* supplied by the initial bootstrap.
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*
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* XXX should be extended for netbooting.
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*/
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static void
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extract_currdev(void)
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{
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struct i386_devdesc new_currdev;
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int major, biosdev = -1;
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/* Assume we are booting from a BIOS disk by default */
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new_currdev.d_dev = &biosdisk;
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/* new-style boot loaders such as pxeldr and cdldr */
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if (kargs->bootinfo == NULL) {
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if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) {
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/* we are booting from a CD with cdboot */
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new_currdev.d_dev = &bioscd;
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new_currdev.d_kind.bioscd.unit = bc_bios2unit(initial_bootdev);
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} else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) {
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/* we are booting from pxeldr */
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new_currdev.d_dev = &pxedisk;
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new_currdev.d_kind.netif.unit = 0;
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} else {
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/* we don't know what our boot device is */
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new_currdev.d_kind.biosdisk.slice = -1;
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new_currdev.d_kind.biosdisk.partition = 0;
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biosdev = -1;
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}
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} else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) {
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/* The passed-in boot device is bad */
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new_currdev.d_kind.biosdisk.slice = -1;
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new_currdev.d_kind.biosdisk.partition = 0;
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biosdev = -1;
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} else {
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new_currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) +
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B_CONTROLLER(initial_bootdev) - 1;
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new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev);
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biosdev = initial_bootinfo->bi_bios_dev;
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major = B_TYPE(initial_bootdev);
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/*
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* If we are booted by an old bootstrap, we have to guess at the BIOS
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* unit number. We will loose if there is more than one disk type
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* and we are not booting from the lowest-numbered disk type
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* (ie. SCSI when IDE also exists).
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*/
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if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */
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biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */
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}
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new_currdev.d_type = new_currdev.d_dev->dv_type;
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/*
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* If we are booting off of a BIOS disk and we didn't succeed in determining
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* which one we booted off of, just use disk0: as a reasonable default.
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*/
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if ((new_currdev.d_type == biosdisk.dv_type) &&
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((new_currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1)) {
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printf("Can't work out which disk we are booting from.\n"
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"Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev);
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new_currdev.d_kind.biosdisk.unit = 0;
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}
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env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev),
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i386_setcurrdev, env_nounset);
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env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset,
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env_nounset);
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}
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COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
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static int
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command_reboot(int argc, char *argv[])
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{
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int i;
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for (i = 0; devsw[i] != NULL; ++i)
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if (devsw[i]->dv_cleanup != NULL)
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(devsw[i]->dv_cleanup)();
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printf("Rebooting...\n");
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delay(1000000);
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__exit(0);
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}
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/* provide this for panic, as it's not in the startup code */
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void
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exit(int code)
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{
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__exit(code);
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}
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COMMAND_SET(heap, "heap", "show heap usage", command_heap);
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static int
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command_heap(int argc, char *argv[])
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{
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mallocstats();
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printf("heap base at %p, top at %p\n", end, sbrk(0));
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return(CMD_OK);
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}
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/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */
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static int
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isa_inb(int port)
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{
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u_char data;
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if (__builtin_constant_p(port) &&
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(((port) & 0xffff) < 0x100) &&
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((port) < 0x10000)) {
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__asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port)));
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} else {
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__asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
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}
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return(data);
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}
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static void
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isa_outb(int port, int value)
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{
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u_char al = value;
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if (__builtin_constant_p(port) &&
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(((port) & 0xffff) < 0x100) &&
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((port) < 0x10000)) {
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__asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port)));
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} else {
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__asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
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}
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}
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