NAME    [Toc]    [Back]

     boot_sparc64 - sparc64 system bootstrapping procedures

DESCRIPTION    [Toc]    [Back]

   System starts
     When powered on, after a panic, or if the system is rebooted
via
     reboot(8)  or shutdown(8), the PROM will proceed to its initialization,
     and will boot an operating system if autoboot is enabled.

   Boot process description    [Toc]    [Back]
     System boot blocks are installed near the start of the  boot
disk using
     the procedure described in installboot(8).  The boot program
attempts to
     load the kernel from the selected boot  device,  which  must
currently be an
     SCSI  (``sd'')  or  IDE  (``wd'')  disk  drive,  or  a cdrom
(``cd''), or an SCSI
     tape drive (``st'').

     The UltraSPARC Open Firmware will normally look for a  bootloader on the
     device  specified  by the boot-device variable.  The OpenBSD
bootloader
     will then look for a kernel named bsd by default, unless the
boot-file
     variable  is set, or a different filename has been specified
in the boot
     command.  To reset this variable to its default, empty, value, type the
     following:

          ok set-default boot-file

     Autoboot  is  enabled  by setting the auto-boot? variable to
``true'', and
     is the factory default.

   Boot process options    [Toc]    [Back]
     The following options are recognized:

           -a    Prompt for the root filesystem and swap  devices
after the devices
 have been configured.
           -c    Enter the ``User Kernel Configuration'' mode upon startup
                 (see boot_config(8)).
           -d    Enter the debugger, ddb(4), as soon as the  kernel console has
                 been initialized.
           -s    Boot the system single-user.  The system will be
booted multi-user
 unless this option is specified.

   Accessing the PROM during runtime    [Toc]    [Back]
     If the sysctl(8) variable ddb.console  is  enabled,  at  any
time you can
     break  back to the ROM by pressing the ``L1'' and ``a'' keys
at the same
     time (if the console is a serial port the same  is  achieved
by sending a
     ``break''), and entering machine prom at the prompt.  If you
do this accidentally
 you can continue whatever was in progress by typing go at the
     PROM prompt, and then cont to return to the system.

FILES    [Toc]    [Back]

     /bsd                   default system kernel
     /usr/mdec/bootblk       primary  bootstrap  for ``ffs'' file
system
     /usr/mdec/ofwboot      secondary bootstrap (usually also installed as
                            /ofwboot)
     /usr/mdec/ofwboot.net  network bootstrap

SEE ALSO    [Toc]    [Back]

     ddb(4),  boot_config(8),  halt(8),  init(8), installboot(8),
reboot(8),
     savecore(8), shutdown(8)

OpenBSD     3.6                          April      19,      1994