d4fe27589a
because the variables will be undefined too. Reported by: sjg@ Pointy hat: ian@
416 lines
12 KiB
C
416 lines
12 KiB
C
/*-
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* MD bootstrap main() and assorted miscellaneous
|
|
* commands.
|
|
*/
|
|
|
|
#include <stand.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
#include <machine/bootinfo.h>
|
|
#include <machine/cpufunc.h>
|
|
#include <machine/psl.h>
|
|
#include <sys/disk.h>
|
|
#include <sys/reboot.h>
|
|
#include <common/drv.h>
|
|
|
|
#include "bootstrap.h"
|
|
#include "common/bootargs.h"
|
|
#include "libi386/libi386.h"
|
|
#include "libi386/smbios.h"
|
|
#include "btxv86.h"
|
|
|
|
#ifdef LOADER_ZFS_SUPPORT
|
|
#include "libzfs.h"
|
|
#endif
|
|
|
|
CTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE);
|
|
CTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO);
|
|
CTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS);
|
|
CTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE);
|
|
|
|
/* Arguments passed in from the boot1/boot2 loader */
|
|
static struct bootargs *kargs;
|
|
|
|
static uint32_t initial_howto;
|
|
static uint32_t initial_bootdev;
|
|
static struct bootinfo *initial_bootinfo;
|
|
|
|
struct arch_switch archsw; /* MI/MD interface boundary */
|
|
|
|
static void extract_currdev(void);
|
|
static int isa_inb(int port);
|
|
static void isa_outb(int port, int value);
|
|
void exit(int code);
|
|
#ifdef LOADER_GELI_SUPPORT
|
|
#include "geliboot.h"
|
|
struct geli_boot_args *gargs;
|
|
struct geli_boot_data *gbdata;
|
|
#endif
|
|
#ifdef LOADER_ZFS_SUPPORT
|
|
struct zfs_boot_args *zargs;
|
|
static void i386_zfs_probe(void);
|
|
#endif
|
|
|
|
/* XXX debugging */
|
|
extern char end[];
|
|
|
|
static void *heap_top;
|
|
static void *heap_bottom;
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
int i;
|
|
|
|
/* Pick up arguments */
|
|
kargs = (void *)__args;
|
|
initial_howto = kargs->howto;
|
|
initial_bootdev = kargs->bootdev;
|
|
initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL;
|
|
|
|
/* Initialize the v86 register set to a known-good state. */
|
|
bzero(&v86, sizeof(v86));
|
|
v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
|
|
|
|
/*
|
|
* Initialise the heap as early as possible. Once this is done, malloc() is usable.
|
|
*/
|
|
bios_getmem();
|
|
|
|
#if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \
|
|
defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT)
|
|
if (high_heap_size > 0) {
|
|
heap_top = PTOV(high_heap_base + high_heap_size);
|
|
heap_bottom = PTOV(high_heap_base);
|
|
if (high_heap_base < memtop_copyin)
|
|
memtop_copyin = high_heap_base;
|
|
} else
|
|
#endif
|
|
{
|
|
heap_top = (void *)PTOV(bios_basemem);
|
|
heap_bottom = (void *)end;
|
|
}
|
|
setheap(heap_bottom, heap_top);
|
|
|
|
/*
|
|
* 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.
|
|
* If the previous boot stage has requested a serial console, prefer that.
|
|
*/
|
|
bi_setboothowto(initial_howto);
|
|
if (initial_howto & RB_MULTIPLE) {
|
|
if (initial_howto & RB_SERIAL)
|
|
setenv("console", "comconsole vidconsole", 1);
|
|
else
|
|
setenv("console", "vidconsole comconsole", 1);
|
|
} else if (initial_howto & RB_SERIAL)
|
|
setenv("console", "comconsole", 1);
|
|
else if (initial_howto & RB_MUTE)
|
|
setenv("console", "nullconsole", 1);
|
|
cons_probe();
|
|
|
|
/*
|
|
* Initialise the block cache. Set the upper limit.
|
|
*/
|
|
bcache_init(32768, 512);
|
|
|
|
/*
|
|
* Special handling for PXE and CD booting.
|
|
*/
|
|
if (kargs->bootinfo == 0) {
|
|
/*
|
|
* We only want the PXE disk to try to init itself in the below
|
|
* walk through devsw if we actually booted off of PXE.
|
|
*/
|
|
if (kargs->bootflags & KARGS_FLAGS_PXE)
|
|
pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL);
|
|
else if (kargs->bootflags & KARGS_FLAGS_CD)
|
|
bc_add(initial_bootdev);
|
|
}
|
|
|
|
archsw.arch_autoload = i386_autoload;
|
|
archsw.arch_getdev = i386_getdev;
|
|
archsw.arch_copyin = i386_copyin;
|
|
archsw.arch_copyout = i386_copyout;
|
|
archsw.arch_readin = i386_readin;
|
|
archsw.arch_isainb = isa_inb;
|
|
archsw.arch_isaoutb = isa_outb;
|
|
#ifdef LOADER_ZFS_SUPPORT
|
|
archsw.arch_zfs_probe = i386_zfs_probe;
|
|
|
|
/*
|
|
* zfsboot and gptzfsboot have always passed KARGS_FLAGS_ZFS, so if that is
|
|
* set along with KARGS_FLAGS_EXTARG we know we can interpret the extarg
|
|
* data as a struct zfs_boot_args.
|
|
*/
|
|
#define KARGS_EXTARGS_ZFS (KARGS_FLAGS_EXTARG | KARGS_FLAGS_ZFS)
|
|
|
|
if ((kargs->bootflags & KARGS_EXTARGS_ZFS) == KARGS_EXTARGS_ZFS) {
|
|
zargs = (struct zfs_boot_args *)(kargs + 1);
|
|
}
|
|
#endif /* LOADER_ZFS_SUPPORT */
|
|
|
|
#ifdef LOADER_GELI_SUPPORT
|
|
/*
|
|
* If we decided earlier that we have zfs_boot_args extarg data, and it is
|
|
* big enough to contain the embedded geli data (the early zfs_boot_args
|
|
* structs weren't), then init the gbdata pointer accordingly. If there is
|
|
* extarg data which isn't zfs_boot_args data, determine whether it is
|
|
* geli_boot_args data. Recent versions of gptboot set KARGS_FLAGS_GELI to
|
|
* indicate that. Earlier versions didn't, but we presume that's what we
|
|
* have if the extarg size exactly matches the size of the geli_boot_args
|
|
* struct during that pre-flag era.
|
|
*/
|
|
#define LEGACY_GELI_ARGS_SIZE 260 /* This can never change */
|
|
|
|
#ifdef LOADER_ZFS_SUPPORT
|
|
if (zargs != NULL) {
|
|
if (zargs->size > offsetof(struct zfs_boot_args, gelidata)) {
|
|
gbdata = &zargs->gelidata;
|
|
}
|
|
} else
|
|
#endif /* LOADER_ZFS_SUPPORT */
|
|
if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) {
|
|
gargs = (struct geli_boot_args *)(kargs + 1);
|
|
if ((kargs->bootflags & KARGS_FLAGS_GELI) ||
|
|
gargs->size == LEGACY_GELI_ARGS_SIZE) {
|
|
gbdata = &gargs->gelidata;
|
|
}
|
|
}
|
|
|
|
if (gbdata != NULL)
|
|
import_geli_boot_data(gbdata);
|
|
#endif /* LOADER_GELI_SUPPORT */
|
|
|
|
/*
|
|
* 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("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024);
|
|
if (initial_bootinfo != NULL) {
|
|
initial_bootinfo->bi_basemem = bios_basemem / 1024;
|
|
initial_bootinfo->bi_extmem = bios_extmem / 1024;
|
|
}
|
|
|
|
/* detect ACPI for future reference */
|
|
biosacpi_detect();
|
|
|
|
/* detect SMBIOS for future reference */
|
|
smbios_detect(NULL);
|
|
|
|
/* detect PCI BIOS for future reference */
|
|
biospci_detect();
|
|
|
|
printf("\n%s", bootprog_info);
|
|
|
|
extract_currdev(); /* set $currdev and $loaddev */
|
|
setenv("LINES", "24", 1); /* optional */
|
|
|
|
bios_getsmap();
|
|
|
|
interact();
|
|
|
|
/* if we ever get here, it is an error */
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Set the 'current device' by (if possible) recovering the boot device as
|
|
* supplied by the initial bootstrap.
|
|
*
|
|
* XXX should be extended for netbooting.
|
|
*/
|
|
static void
|
|
extract_currdev(void)
|
|
{
|
|
struct i386_devdesc new_currdev;
|
|
#ifdef LOADER_ZFS_SUPPORT
|
|
char buf[20];
|
|
#endif
|
|
int biosdev = -1;
|
|
|
|
/* Assume we are booting from a BIOS disk by default */
|
|
new_currdev.dd.d_dev = &bioshd;
|
|
|
|
/* new-style boot loaders such as pxeldr and cdldr */
|
|
if (kargs->bootinfo == 0) {
|
|
if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) {
|
|
/* we are booting from a CD with cdboot */
|
|
new_currdev.dd.d_dev = &bioscd;
|
|
new_currdev.dd.d_unit = bd_bios2unit(initial_bootdev);
|
|
} else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) {
|
|
/* we are booting from pxeldr */
|
|
new_currdev.dd.d_dev = &pxedisk;
|
|
new_currdev.dd.d_unit = 0;
|
|
} else {
|
|
/* we don't know what our boot device is */
|
|
new_currdev.d_kind.biosdisk.slice = -1;
|
|
new_currdev.d_kind.biosdisk.partition = 0;
|
|
biosdev = -1;
|
|
}
|
|
#ifdef LOADER_ZFS_SUPPORT
|
|
} else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) {
|
|
/* zargs was set in main() if we have new style extended argument */
|
|
if (zargs != NULL &&
|
|
zargs->size >= offsetof(struct zfs_boot_args, primary_pool)) {
|
|
/* sufficient data is provided */
|
|
new_currdev.d_kind.zfs.pool_guid = zargs->pool;
|
|
new_currdev.d_kind.zfs.root_guid = zargs->root;
|
|
if (zargs->size >= sizeof(*zargs) && zargs->primary_vdev != 0) {
|
|
sprintf(buf, "%llu", zargs->primary_pool);
|
|
setenv("vfs.zfs.boot.primary_pool", buf, 1);
|
|
sprintf(buf, "%llu", zargs->primary_vdev);
|
|
setenv("vfs.zfs.boot.primary_vdev", buf, 1);
|
|
}
|
|
} else {
|
|
/* old style zfsboot block */
|
|
new_currdev.d_kind.zfs.pool_guid = kargs->zfspool;
|
|
new_currdev.d_kind.zfs.root_guid = 0;
|
|
}
|
|
new_currdev.dd.d_dev = &zfs_dev;
|
|
#endif
|
|
} else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) {
|
|
/* The passed-in boot device is bad */
|
|
new_currdev.d_kind.biosdisk.slice = -1;
|
|
new_currdev.d_kind.biosdisk.partition = 0;
|
|
biosdev = -1;
|
|
} else {
|
|
new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1;
|
|
new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev);
|
|
biosdev = initial_bootinfo->bi_bios_dev;
|
|
|
|
/*
|
|
* If we are booted by an old bootstrap, we have to guess at the BIOS
|
|
* unit number. We will lose if there is more than one disk type
|
|
* and we are not booting from the lowest-numbered disk type
|
|
* (ie. SCSI when IDE also exists).
|
|
*/
|
|
if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */
|
|
biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */
|
|
}
|
|
|
|
/*
|
|
* If we are booting off of a BIOS disk and we didn't succeed in determining
|
|
* which one we booted off of, just use disk0: as a reasonable default.
|
|
*/
|
|
if ((new_currdev.dd.d_dev->dv_type == bioshd.dv_type) &&
|
|
((new_currdev.dd.d_unit = bd_bios2unit(biosdev)) == -1)) {
|
|
printf("Can't work out which disk we are booting from.\n"
|
|
"Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev);
|
|
new_currdev.dd.d_unit = 0;
|
|
}
|
|
|
|
#ifdef LOADER_ZFS_SUPPORT
|
|
if (new_currdev.dd.d_dev->dv_type == DEVT_ZFS)
|
|
init_zfs_bootenv(zfs_fmtdev(&new_currdev));
|
|
#endif
|
|
|
|
env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev),
|
|
i386_setcurrdev, env_nounset);
|
|
env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset,
|
|
env_nounset);
|
|
}
|
|
|
|
COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
|
|
|
|
static int
|
|
command_reboot(int argc, char *argv[])
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; devsw[i] != NULL; ++i)
|
|
if (devsw[i]->dv_cleanup != NULL)
|
|
(devsw[i]->dv_cleanup)();
|
|
|
|
printf("Rebooting...\n");
|
|
delay(1000000);
|
|
__exit(0);
|
|
}
|
|
|
|
/* provide this for panic, as it's not in the startup code */
|
|
void
|
|
exit(int code)
|
|
{
|
|
__exit(code);
|
|
}
|
|
|
|
COMMAND_SET(heap, "heap", "show heap usage", command_heap);
|
|
|
|
static int
|
|
command_heap(int argc, char *argv[])
|
|
{
|
|
mallocstats();
|
|
printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom,
|
|
sbrk(0), heap_top);
|
|
return(CMD_OK);
|
|
}
|
|
|
|
/* ISA bus access functions for PnP. */
|
|
static int
|
|
isa_inb(int port)
|
|
{
|
|
|
|
return (inb(port));
|
|
}
|
|
|
|
static void
|
|
isa_outb(int port, int value)
|
|
{
|
|
|
|
outb(port, value);
|
|
}
|
|
|
|
#ifdef LOADER_ZFS_SUPPORT
|
|
static void
|
|
i386_zfs_probe(void)
|
|
{
|
|
char devname[32];
|
|
struct i386_devdesc dev;
|
|
|
|
/*
|
|
* Open all the disks we can find and see if we can reconstruct
|
|
* ZFS pools from them.
|
|
*/
|
|
dev.dd.d_dev = &bioshd;
|
|
for (dev.dd.d_unit = 0; bd_unit2bios(&dev) >= 0; dev.dd.d_unit++) {
|
|
snprintf(devname, sizeof(devname), "%s%d:", bioshd.dv_name,
|
|
dev.dd.d_unit);
|
|
zfs_probe_dev(devname, NULL);
|
|
}
|
|
}
|
|
#endif
|