160 lines
4.8 KiB
C
160 lines
4.8 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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* $Id: main.c,v 1.5 1998/09/17 23:52:15 msmith Exp $
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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 "bootstrap.h"
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#include "libi386/libi386.h"
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#include "btxv86.h"
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struct arch_switch archsw; /* MI/MD interface boundary */
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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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void
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main(void)
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{
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struct i386_devdesc currdev;
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int i;
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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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* XXX better to locate end of memory and use that
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*/
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setheap((void *)end, (void *)(end + (384 * 1024)));
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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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*/
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cons_probe();
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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("\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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printf("memory: %d/%dkB\n", getbasemem(), getextmem());
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#if 0
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printf("diskbuf at %p, %d sectors\n", &diskbuf, diskbuf_size);
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printf("using %d bytes of stack at %p\n", (&stacktop - &stackbase), &stacktop);
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#endif
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/* We're booting from a BIOS disk, try to spiff this */
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currdev.d_dev = devsw[0]; /* XXX presumes that biosdisk is first in devsw */
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currdev.d_type = currdev.d_dev->dv_type;
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currdev.d_kind.biosdisk.unit = 0; /* XXX wrong, need to get from bootinfo etc. */
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currdev.d_kind.biosdisk.slice = -1; /* XXX should be able to detect this, default to autoprobe */
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currdev.d_kind.biosdisk.partition = 0; /* default to 'a' */
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/* Create i386-specific variables */
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env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset);
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env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset);
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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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/*
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* XXX should these be in the MI source?
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*/
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#if 0
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legacy_config(); /* read old /boot.config file */
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#endif
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interact(); /* doesn't return */
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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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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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#if 0 /* XXX learn to ask BTX */
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COMMAND_SET(stack, "stack", "show stack usage", command_stack);
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extern char stackbase, stacktop;
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static int
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command_stack(int argc, char *argv[])
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{
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char *cp;
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for (cp = &stackbase; cp < &stacktop; cp++)
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if (*cp != 0)
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break;
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printf("%d bytes of stack used\n", &stacktop - cp);
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return(CMD_OK);
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}
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#endif
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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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printf("heap base at %p, top at %p, used %d\n", end, sbrk(0), sbrk(0) - end);
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return(CMD_OK);
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}
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