06b57b0e09
- Move some startup code from MD to MI sections - Add a 'copyout' and some copyout-related functions. These will be obsoleted when BTX is available for the 386 and the kernel load area becomes directly addressable. - Add the ability load an arbitrary file as a module, associating and arbitrary type string with it. This can be used eg. for loading splash-screen images etc. - Add KLD module dependancy infrastructure. We know how to look for dependancies inside KLD modules, how to resolve these dependancies and what to do if things go wrong. Only works for a.out at the moment, due to lack of an MI ELF loader. Attach KLD module information to loaded modules as metadata, but don't pass it to the kernel (it can find it itself). - Load a.out KLD modules on a page boundary. Only pad the a.out BSS for the kernel, as it may want to throw symbols away. (We might want to do this for KLD modules too.) - Allow commands to be hidden from the '?' display, to avoid cluttering it with things like 'echo'. Add 'echo'. - Bring the 'prompt' command into line with the parser syntax. - Fix the verbose 'ls'; it was using an uninitialised stack variable. - Add a '-v' flag to 'lsmod' to have it display module metadata as well (not terribly useful for the average user) - Support a 'module searchpath' for required modules. - The bootstrap file on i386 is now called 'loader' to permit the /boot directory to use that name. - Discard the old i386 pread() function, as it's replaced by arch_readin()
153 lines
4.7 KiB
C
153 lines
4.7 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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* $Id: main.c,v 1.2 1998/08/31 21:10:43 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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extern int boot_biosdev; /* from runtime startup */
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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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#include "libi386/crt/diskbuf.h"
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extern char stackbase, stacktop;
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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, alloc() is usable.
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* The stack is buried inside us, so this is safe
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*/
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setheap((void *)end, (void *)(end + 0x80000));
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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 = boot_biosdev;
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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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reboot();
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/* Note: we shouldn't get to this point! */
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panic("Reboot failed!");
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exit(0);
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}
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COMMAND_SET(stack, "stack", "show stack usage", command_stack);
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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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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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