Update for the new boot system.
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minoura
parent
36fef830b3
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8c115084b4
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@ -1,4 +1,4 @@
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.\" $NetBSD: boot.8,v 1.5 2001/04/12 13:36:54 wiz Exp $
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.\" $NetBSD: boot.8,v 1.6 2002/01/15 16:11:21 minoura Exp $
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.\"
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.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -31,9 +31,9 @@
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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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.\" @(#)boot_x68k.8 8.2 (Berkeley) 4/19/94
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.\" @(#)boot_i386.8 8.2 (Berkeley) 4/19/94
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.\"
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.Dd June 16, 1996
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.Dd Jan 15, 2002
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.Dt BOOT 8 x68k
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.Os
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.Sh NAME
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@ -54,35 +54,149 @@ floppy disk drive (from 0 to 3) first,
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and then attempt to boot from hard disk (SASI or SCSI).
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On the
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.Nx Ns Tn /x68k Ns ,
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booting from partition A of SCSI disks (sd?a)
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booting from SCSI disks (sd??)
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and 2HD floppy disks (fd?a, fd?c) is currently supported.
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.Pp
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First, the initial program loader of IOCS ROM or SCSI disk
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(or equivalent) reads
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.Pa boot
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program at the top of the disk,
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and then the boot program loads the
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.Ss Bootstrappinging from a floppy
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When the floppy disk is selected as the boot device, the initial
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program loader of the IOCS (firmware) reads
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.Pa fdboot_ufs
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program at the top of the disk, and then the fdboot_ufs program loads the
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.Pa /boot
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program from the FFS or LFS filesystem. Normally, the
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.Pa /boot
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program then loads the
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.Nx
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kernel
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.Pa /netbsd
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which is in the same partition of the disk.
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If you press
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.Pa [SHIFT]
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key when booting, the boot program enables you to change
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boot flag
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.Dv RB_SINGLE
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with the
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.Pa [SHIFT]
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key, and to choose which kernel
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to be used with arrow keys.
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If the LED of
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.Pa [HIRAGANA]
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key is turned on, the boot program adds
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.Dv RB_KDB
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flag and tries to boot the system in debug mode; see
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.Xr ddb 4
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for details.
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from the same floppy. In addition, the
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.Pa /boot
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program has abilities to uncompress gzip'ed kernel, to read
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the kernel from other disks of other filesystems etc (see below).
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.Pp
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For floppy disks, fdboot_ustar is also provided to read a large
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kernel which does not fit with a single floppy.
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.Ss Bootstrapping from a SCSI hard disk
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When a SCSI hard disk is selected as the boot device, the initial
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program loader on the SCSI host adapter's ROM reads the
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operationg system-independent IPL menu program at the top of the disk.
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IPL menu program recognizes the partition table, and selects the partition
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to read the operating system kernel. During this phase, when the
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HELP key on the keyboard is pressed, the IPL menu program displays
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the partition menu of that disk to prompt the user to select the boot
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partition (although the
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.Nx
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implementation of the IPL menu,
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.Pa /usr/mdec/mboot ,
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does not have this functionallity).
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.Pp
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Next, the IPL menu reads the OS-dependent boot program from the
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top of the selected partition. For
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.Nx
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FFS/LFS filesystem
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.Pa sdboot_ufs
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program is used. The
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.Pa sdboot_ufs
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program then loads the
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.Pa /boot
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program from that partition.
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.Ss Normal Operation
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Once running, a banner similar to the following will appear:
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.Bd -unfilled -offset indent
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NetBSD Multi-boot, Revision 1.1
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(user@buildhost, builddate)
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Press return to boot now, any other key for boot menu
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booting sd0a:netbsd - starting in 5
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.Ed
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.Pp
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After a countdown, the system image listed will be loaded. (In the
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above example, it will be
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.Dq Li sd0a:netbsd
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which is the file
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.Nm netbsd
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on partition
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.Dq a
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of the
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.Nx
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SCSI hard disk of ID 0.
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Pressing a key within the time limit will enter interactive mode.
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.Ss Interactive mode
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In interactive mode, the boot loader will present a prompt, allowing
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input of these commands:
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.Bl -tag -width 04n -offset 04n
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.It Xo Ic boot
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.Op Va device : Ns
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.Op Va filename
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.Op Fl adqsv
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.Xc
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The default
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.Va device
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will be set to the disk that the boot loader was
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loaded from.
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To boot from an alternate disk, the full name of the device should
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be given at the prompt.
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.Va device
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is of the form
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.Xo Va xd
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.Op Va N Ns Op Va x
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.Xc
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where
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.Va xd
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is the device from which to boot,
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.Va N
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is the unit number, and
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.Va x
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is the partition letter.
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.Pp
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The following list of supported devices may vary from installation to
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installation:
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.Pp
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.Bl -hang -compact
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.It sd
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SCSI disks on a controller recognized by the IOCS. The
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unit number is the SCSI ID.
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.It fd
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Floppy drives as numbered by the IOCS.
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.El
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.Pp
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The default
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.Va filename
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is
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.Pa netbsd ;
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if the boot loader fails to successfully
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open that image, it then tries
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.Pa netbsd.gz
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(expected to be a kernel image compressed by gzip).
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Alternate system images can be loaded by just specifying the name of the image.
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.Pp
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Options are:
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.Bl -tag -width xxx
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.It Fl a
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Prompt for the location of the root filesystem and the system crash
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dump device.
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.It Fl d
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Bring the system up in debug mode. Here it waits for a kernel
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debugger connect; see
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.Xr ddb 4 .
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.It Fl q
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Boot the system in quiet mode.
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.It Fl s
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Bring the system up in single-user mode.
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.It Fl v
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Boot the system in verbose mode.
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.El
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.It Ic help
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Print an overview about commands and arguments.
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.It Ic ls Op Pa path
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Print a directory listing of
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.Pa path ,
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containing inode number, filename and file type.
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.Pa path
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can contain a device specification.
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.It Ic halt
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Reboot the system.
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.El
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.Ss Model-specific notes
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Note for X68030+MC68030 systems:
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Nothing special to be attended to; you can boot
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.Nx
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@ -104,11 +218,17 @@ which must reside in the battery-backuped SRAM.
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Note for X68000/Jupiter-X(68040/060 accelerator by FTZ-net) systems:
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The system must be in 040/060 processor mode.
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.Sh FILES
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.Bl -tag -width /usr/mdec/xxbootxx -compact
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.Bl -tag -width /usr/mdec/xxboot_ufs -compact
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.It Pa /netbsd
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system code
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.It Pa /usr/mdec/xxboot
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boot program, xx is disk type
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.It Pa /netbsd.gz
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gzip-compressed system code
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.It Pa /usr/mdec/xxboot_ufs
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boot block (read by installboot), xx is disktype
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.It Pa /usr/mdec/boot
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source of /boot (can be just copied to the root directory)
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.It Pa /boot
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main part of the boot program
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.El
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.Sh SEE ALSO
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.Xr reboot 2 ,
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@ -116,3 +236,4 @@ boot program, xx is disk type
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.Xr halt 8 ,
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.Xr reboot 8 ,
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.Xr shutdown 8
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.\" installboot(8) must be written
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