BOOT_SPARC64(8)    OpenBSD System Manager's Manual (SPARC64)   BOOT_SPARC64(8)

NAME
     boot_sparc64 - sparc64 system bootstrapping procedures

DESCRIPTION
   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
     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 CD-ROM (``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
     The following options are recognized:

           -a    Prompt for the root filesystem and swap devices after the de-
                 vices 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 mul-
                 ti-user unless this option is specified.

   Accessing the PROM during runtime
     If the sysctl(8) variable ddb.console is enabled, at any time you can
     break back to the ROM by pressing the ``L1'' (also known as the ``stop
     key'') 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
     /bsd                   default system kernel
     /bsd.rd                standalone installation kernel, suitable for dis-
                            aster recovery
     /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
     ddb(4), boot_config(8), halt(8), init(8), installboot(8), reboot(8),
     savecore(8), shutdown(8)

OpenBSD 4.7                     January 3, 2010                              1
