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/*- |
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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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|
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#include <sys/cdefs.h> |
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__FBSDID("$FreeBSD$"); |
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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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|
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#include <stand.h> |
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#include <stddef.h> |
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#include <string.h> |
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#include <machine/bootinfo.h> |
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#include <machine/cpufunc.h> |
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#include <machine/psl.h> |
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#include <sys/reboot.h> |
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|
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#include "bootstrap.h" |
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#include "common/bootargs.h" |
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#include "libi386/libi386.h" |
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#include "libi386/smbios.h" |
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#include "btxv86.h" |
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|
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#ifdef LOADER_ZFS_SUPPORT |
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#include "../zfs/libzfs.h" |
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#endif |
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|
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CTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE); |
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CTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO); |
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CTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS); |
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CTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE); |
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|
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/* Arguments passed in from the boot1/boot2 loader */ |
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static struct bootargs *kargs; |
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|
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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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|
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struct arch_switch archsw; /* MI/MD interface boundary */ |
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|
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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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#ifdef LOADER_ZFS_SUPPORT |
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static void i386_zfs_probe(void); |
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#endif |
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|
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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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|
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/* XXX debugging */ |
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extern char end[]; |
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|
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static void *heap_top; |
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static void *heap_bottom; |
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|
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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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|
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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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/* Initialize the v86 register set to a known-good state. */ |
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bzero(&v86, sizeof(v86)); |
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v86.efl = PSL_RESERVED_DEFAULT | PSL_I; |
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|
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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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|
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#if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \ |
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defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT) |
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if (high_heap_size > 0) { |
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heap_top = PTOV(high_heap_base + high_heap_size); |
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heap_bottom = PTOV(high_heap_base); |
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if (high_heap_base < memtop_copyin) |
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memtop_copyin = high_heap_base; |
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} else |
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#endif |
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{ |
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heap_top = (void *)PTOV(bios_basemem); |
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heap_bottom = (void *)end; |
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} |
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setheap(heap_bottom, heap_top); |
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|
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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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bi_setboothowto(initial_howto); |
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if (initial_howto & RB_MULTIPLE) { |
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if (initial_howto & RB_SERIAL) |
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setenv("console", "comconsole vidconsole", 1); |
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else |
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setenv("console", "vidconsole comconsole", 1); |
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} else if (initial_howto & RB_SERIAL) |
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setenv("console", "comconsole", 1); |
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else 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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/* |
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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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/* |
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* Special handling for PXE and CD booting. |
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*/ |
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if (kargs->bootinfo == 0) { |
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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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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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#ifdef LOADER_ZFS_SUPPORT |
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archsw.arch_zfs_probe = i386_zfs_probe; |
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#endif |
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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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|
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/* detect ACPI for future reference */ |
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biosacpi_detect(); |
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|
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/* detect SMBIOS for future reference */ |
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smbios_detect(NULL); |
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|
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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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|
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extract_currdev(); /* set $currdev and $loaddev */ |
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setenv("LINES", "24", 1); /* optional */ |
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|
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bios_getsmap(); |
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|
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interact(); /* doesn't return */ |
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|
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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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/* |
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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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#ifdef LOADER_ZFS_SUPPORT |
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char buf[20]; |
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struct zfs_boot_args *zargs; |
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#endif |
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int biosdev = -1; |
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|
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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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|
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/* new-style boot loaders such as pxeldr and cdldr */ |
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if (kargs->bootinfo == 0) { |
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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_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_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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#ifdef LOADER_ZFS_SUPPORT |
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} else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) { |
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zargs = NULL; |
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/* check for new style extended argument */ |
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if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) |
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zargs = (struct zfs_boot_args *)(kargs + 1); |
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|
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if (zargs != NULL && |
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zargs->size >= offsetof(struct zfs_boot_args, primary_pool)) { |
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/* sufficient data is provided */ |
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new_currdev.d_kind.zfs.pool_guid = zargs->pool; |
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new_currdev.d_kind.zfs.root_guid = zargs->root; |
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if (zargs->size >= sizeof(*zargs) && zargs->primary_vdev != 0) { |
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sprintf(buf, "%llu", zargs->primary_pool); |
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setenv("vfs.zfs.boot.primary_pool", buf, 1); |
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sprintf(buf, "%llu", zargs->primary_vdev); |
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setenv("vfs.zfs.boot.primary_vdev", buf, 1); |
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} |
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} else { |
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/* old style zfsboot block */ |
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new_currdev.d_kind.zfs.pool_guid = kargs->zfspool; |
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new_currdev.d_kind.zfs.root_guid = 0; |
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} |
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new_currdev.d_dev = &zfs_dev; |
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#endif |
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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_SLICE(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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|
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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 lose 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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/* |
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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_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_unit = 0; |
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} |
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|
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#ifdef LOADER_ZFS_SUPPORT |
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if (new_currdev.d_type == DEVT_ZFS) |
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init_zfs_bootenv(zfs_fmtdev(&new_currdev)); |
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#endif |
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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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|
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COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); |
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|
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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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|
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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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|
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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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|
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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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|
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COMMAND_SET(heap, "heap", "show heap usage", command_heap); |
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|
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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, upper limit at %p\n", heap_bottom, |
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sbrk(0), heap_top); |
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return(CMD_OK); |
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} |
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|
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#ifdef LOADER_ZFS_SUPPORT |
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COMMAND_SET(lszfs, "lszfs", "list child datasets of a zfs dataset", |
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command_lszfs); |
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|
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static int |
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command_lszfs(int argc, char *argv[]) |
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{ |
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int err; |
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|
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if (argc != 2) { |
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command_errmsg = "wrong number of arguments"; |
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return (CMD_ERROR); |
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} |
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|
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err = zfs_list(argv[1]); |
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if (err != 0) { |
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command_errmsg = strerror(err); |
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return (CMD_ERROR); |
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} |
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|
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return (CMD_OK); |
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} |
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|
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COMMAND_SET(reloadbe, "reloadbe", "refresh the list of ZFS Boot Environments", |
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command_reloadbe); |
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|
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static int |
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command_reloadbe(int argc, char *argv[]) |
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{ |
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int err; |
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char *root; |
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|
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if (argc > 2) { |
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command_errmsg = "wrong number of arguments"; |
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return (CMD_ERROR); |
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} |
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|
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if (argc == 2) { |
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err = zfs_bootenv(argv[1]); |
| 378 |
} else { |
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root = getenv("zfs_be_root"); |
| 380 |
if (root == NULL) { |
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/* There does not appear to be a ZFS pool here, exit without error */ |
| 382 |
return (CMD_OK); |
| 383 |
} |
| 384 |
err = zfs_bootenv(getenv("zfs_be_root")); |
| 385 |
} |
| 386 |
|
| 387 |
if (err != 0) { |
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command_errmsg = strerror(err); |
| 389 |
return (CMD_ERROR); |
| 390 |
} |
| 391 |
|
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return (CMD_OK); |
| 393 |
} |
| 394 |
#endif |
| 395 |
|
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/* ISA bus access functions for PnP. */ |
| 397 |
static int |
| 398 |
isa_inb(int port) |
| 399 |
{ |
| 400 |
|
| 401 |
return (inb(port)); |
| 402 |
} |
| 403 |
|
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static void |
| 405 |
isa_outb(int port, int value) |
| 406 |
{ |
| 407 |
|
| 408 |
outb(port, value); |
| 409 |
} |
| 410 |
|
| 411 |
#ifdef LOADER_ZFS_SUPPORT |
| 412 |
static void |
| 413 |
i386_zfs_probe(void) |
| 414 |
{ |
| 415 |
char devname[32]; |
| 416 |
int unit; |
| 417 |
|
| 418 |
/* |
| 419 |
* Open all the disks we can find and see if we can reconstruct |
| 420 |
* ZFS pools from them. |
| 421 |
*/ |
| 422 |
for (unit = 0; unit < MAXBDDEV; unit++) { |
| 423 |
if (bd_unit2bios(unit) == -1) |
| 424 |
break; |
| 425 |
sprintf(devname, "disk%d:", unit); |
| 426 |
zfs_probe_dev(devname, NULL); |
| 427 |
} |
| 428 |
} |
| 429 |
#endif |
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