BOOT_LUNA88K(8) OpenBSD System Manager's Manual (Luna88k) BOOT_LUNA88K(8)NAMEboot_luna88k - luna88k system bootstrapping procedures
DESCRIPTION
Boot process description
When powered on, or after a system reboot, the luna88k ROM monitor will
proceed to its initialization, and will boot the operating system
configured in nvram if autoboot is enabled.
DIP switches description
The behaviour of the ROM monitor, as well as some kernel options, are
controlled through the SW1 set of DIP switches on the front panel.
The switch positions are not the same on Luna-88k and Luna-88k2 models.
On Luna-88k, a switch is enabled when in the down position, while on the
Luna-88k2, a switch is enabled when in the up position.
The following switches alter the ROM monitor behaviour:
Switch Enabled Disabled
1 interact with ROM monitor auto-boot
2 serial console graphics console
The following switches alter the kernel behaviour:
Switch Enabled Disabled
1 boot in single-user mode boot in multi-user mode
3 prompt for root device do not prompt for root device
4 enter UKC mode do not enter UKC mode
For more details about the ``User Kernel Configuration'' mode (UKC), see
boot_config(8).
Note that the first switch controls both the kernel and the ROM monitor
behaviour.
Abnormal system termination
In case of system crashes, the kernel will usually enter the kernel
debugger, ddb(4), unless it is not present in the kernel, or it is
disabled via the ddb.panic sysctl. Upon leaving ddb, or if ddb was not
entered, the kernel will halt the system if it was still in device
configuration phase, or attempt a dump to the configured dump device, if
possible. The crash dump will then be recovered by savecore(8) during
the next multi-user boot cycle. It is also possible to force other
behaviours from ddb.
FILES
/bsd default system kernel
/bsd.rd standalone installation kernel, suitable for disaster recovery
SEE ALSOddb(4), boot_config(8), halt(8), init(8), reboot(8), savecore(8),
shutdown(8)CAVEATS
There is currently no standalone bootloader program on the Luna88k. The
OpenBSD kernel is loaded directly from the ROM monitor. Because of this,
kernel symbols are not available.
OpenBSD 4.9 May 31, 2007 OpenBSD 4.9