boot_sparc64 - sparc64 system bootstrapping procedures
When powered on, after a panic, or if the system is rebooted
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
the procedure described in installboot(8). The boot program
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
will then look for a kernel named bsd by default, unless the
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
ok set-default boot-file
Autoboot is enabled by setting the auto-boot? variable to
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
-d Enter the debugger, ddb(4), as soon as the kernel console has
-s Boot the system single-user. The system will be
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.
/bsd default system kernel
/usr/mdec/bootblk primary bootstrap for ``ffs'' file
/usr/mdec/ofwboot secondary bootstrap (usually also installed as
/usr/mdec/ofwboot.net network bootstrap
ddb(4), boot_config(8), halt(8), init(8), installboot(8),
OpenBSD 3.6 April 19, 1994
[ Back ]