diff options
Diffstat (limited to 'sys/boot/i386/loader/main.c')
| -rw-r--r-- | sys/boot/i386/loader/main.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/sys/boot/i386/loader/main.c b/sys/boot/i386/loader/main.c new file mode 100644 index 0000000..ac8bf82 --- /dev/null +++ b/sys/boot/i386/loader/main.c @@ -0,0 +1,156 @@ +/*- + * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $Id$ + */ + +/* + * MD bootstrap main() and assorted miscellaneous + * commands. + */ + +#include <stand.h> +#include <string.h> + +#include "bootstrap.h" +#include "libi386/libi386.h" + +extern int boot_biosdev; /* from runtime startup */ + +struct arch_switch archsw; /* MI/MD interface boundary */ + +/* from vers.c */ +extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; + +/* XXX debugging */ +#include "libi386/crt/diskbuf.h" +extern char stackbase, stacktop; +extern char end[]; + +void +main(void) +{ + struct i386_devdesc currdev; + int i; + + /* + * Initialise the heap as early as possible. Once this is done, alloc() is usable. + * The stack is buried inside us, so this is safe + */ + setheap((void *)end, (void *)(end + 0x80000)); + + /* + * XXX Chicken-and-egg problem; we want to have console output early, but some + * console attributes may depend on reading from eg. the boot device, which we + * can't do yet. + * + * We can use printf() etc. once this is done. + */ + cons_probe(); + + /* + * March through the device switch probing for things. + */ + for (i = 0; devsw[i] != NULL; i++) + if (devsw[i]->dv_init != NULL) + (devsw[i]->dv_init)(); + + printf("\n"); + printf("%s, Revision %s\n", bootprog_name, bootprog_rev); + printf("(%s, %s)\n", bootprog_maker, bootprog_date); + printf("memory: %d/%dkB\n", getbasemem(), getextmem()); +#if 0 + printf("diskbuf at %p, %d sectors\n", &diskbuf, diskbuf_size); + printf("using %d bytes of stack at %p\n", (&stacktop - &stackbase), &stacktop); +#endif + + /* We're booting from a BIOS disk, try to spiff this */ + currdev.d_dev = devsw[0]; /* XXX presumes that biosdisk is first in devsw */ + currdev.d_type = currdev.d_dev->dv_type; + currdev.d_kind.biosdisk.unit = boot_biosdev; + currdev.d_kind.biosdisk.slice = -1; /* XXX should be able to detect this, default to autoprobe */ + currdev.d_kind.biosdisk.partition = 0; /* default to 'a' */ + + /* Create i386-specific variables */ + + env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&currdev), i386_setcurrdev, env_nounset); + env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&currdev), env_noset, env_nounset); + setenv("LINES", "24", 1); /* optional */ + + archsw.arch_autoload = i386_autoload; + archsw.arch_boot = i386_boot; + archsw.arch_getdev = i386_getdev; + /* + * XXX should these be in the MI source? + */ + source("/boot/boot.conf"); +#if 0 + legacy_config(); /* read old /boot.config file */ +#endif + printf("\n"); + autoboot(10, NULL); /* try to boot automatically */ + printf("\nType '?' for a list of commands, 'help' for more detailed help.\n"); + setenv("prompt", "$currdev>", 1); + + interact(); /* doesn't return */ +} + +COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); + +static int +command_reboot(int argc, char *argv[]) +{ + + printf("Rebooting...\n"); + delay(1000000); + reboot(); + /* Note: we shouldn't get to this point! */ + panic("Reboot failed!"); + exit(0); +} + +COMMAND_SET(stack, "stack", "show stack usage", command_stack); + +static int +command_stack(int argc, char *argv[]) +{ + char *cp; + + for (cp = &stackbase; cp < &stacktop; cp++) + if (*cp != 0) + break; + + printf("%d bytes of stack used\n", &stacktop - cp); + return(CMD_OK); +} + +COMMAND_SET(heap, "heap", "show heap usage", command_heap); + +static int +command_heap(int argc, char *argv[]) +{ + printf("heap base at %p, top at %p, used %d\n", end, sbrk(0), sbrk(0) - end); + return(CMD_OK); +} |
