HP-UX 11i June 2001 Release Notes

Workstation/Server Specific Information
N4000 Server Functionality
Chapter 360
SBA PSM
The SBA PSM detects and configures the system bus adapter hardware
and translates addresses between the Merced bus and the underlying
LBA.
The SBA PSM supports system bus adapters on all N4000 systems. It is
active and visible to users on N4000 systems.
SAPIC PSM
The SAPIC PSM manages line-based interrupts. This configurable
software module handles interrupts routed through the I/O SAPICs.
The SAPIC PSM conforms to the Central Bus CDIO platform
infrastructure. It maintains the SAPIC redirection table.
CB CDIO
The CB CDIO contains interfaces that isolate platform-specific code from
the rest of the kernel. These interfaces allow generic access to the
platforms, regardless of which platform-specific PSMs are active in the
kernel. The Central Bus framework interconnects the different PSMs
that control the hardware.
For backward compatibility, the PA-CDIO has been restructured into a
PA-generic PSM and PA-legacy PSM.
LBA CDIO
The LBA CDIO provides bus translation for all activity between the
System Bus Adapter and the PCI bus. The LBA CDIO is the
hardware-enabling HP-UX kernel module that controls the lower bus
adapter and, therefore, all the intricacies of the dependent hardware.
This CDIO also resolves any overlapping configuration issues with LBA,
and interacts directly with the PCI CDIO.
PCI CDIO
The PCI subsystem has been redesigned to support PCI Card Online
Addition and Replacement (OLAR) and to support a new interrupt line
routing architecture.
On legacy systems (B-, C-, and V-Class), platform firmware had complete
responsibility for configuring all devices. In order to support PCI Card
OLAR, the PCI CDIO detects unconfigured PCI devices and programs