Pre-os and runtime sub-os functionality, Computer Engineering

Assignment Help:

In a raw Itanium, a "Processor Abstraction Layer" (PAL) is integrated into the system. When it is booted the PAL is loaded into the CPU and gives a low-level interface that abstracts some instructions and gives a mechanism for processor updates distributed via a BIOS update.

During BIOS initialization an additional layer of code, the "System Abstraction Layer" (SAL) is loaded that gives a uniform API for execution-specific platform functions.

On top of the PAL/SAL interface sits the "Extensible Firmware Interface" (EFI). EFI is not part of the IA-64 architecture but by convention it is needed on all IA-64 systems. It is a easy API for access to logical aspects of the system (display, storage, keyboard, etc) combined with a lightweight runtime environment (same to DOS) that allows basic system administration tasks such as configuring storage adapters, flashing BIOS and running an OS boot-loader.

Once the OS has been booted, some aspects of the PAL/SAL/EFI stack remain resident in memory and can be accessed by the OS to perform low-level tasks that are implementation-dependent on the underlying hardware.


Related Discussions:- Pre-os and runtime sub-os functionality

Syntax and semantics for first-order logic , Syntax and Semanticsx and Sema...

Syntax and Semanticsx and Semantics for First-order logic - artificial intelligence: Propositional logic is limited  in its expressiveness: it may just represent true and false

Calculate traffic offered in erlangs in a particular exchang, In a particul...

In a particular exchange during busy hour 1200 calls were offered to a group of trunks, during this time 6 calls were lost. The average call duration being 3 minutes Calculate Traf

Component fulfil this requirement, A component has the time to failure dist...

A component has the time to failure distribution that is modelled as the Weibull distribution with shape parameter 3 and scale parameter of 36 months. This component is planned to

State the term- combinational circuit, In a pure combinational circuit is ...

In a pure combinational circuit is it necessary to mention all the inputs in sensitivity disk? if yes, why? Yes in a pure combinational circuit is it essential to mention all

Describe five bit even parity checker, Describe five bit even parity checke...

Describe five bit even parity checker. Ans: Five bit even parity checker: EX-OR gates are utilized for checking the parity as they generate output 1, while the input ha

Inherent addressing, Inherent addressing   Here the address is already b...

Inherent addressing   Here the address is already built in to the instruction i.e. inherent to the code     ABA  ; Add A to B and store the answer in A  Simple programs using

What do you understand by a file system, Problem (a) What do you mean...

Problem (a) What do you meant by a file system? (b) Mention the five categories of data for a basic file system reference model. What is the use of such a reference model

Create a system dynamic model, Easter Island is a small island (about 150 s...

Easter Island is a small island (about 150 square miles in area) in the Pacific Ocean about 2,000 miles from South America. In about 400 AD there was a small population of settlers

Estimate the circuit switched network, a) Total available bandwidth = 1 Mbp...

a) Total available bandwidth = 1 Mbps = 1000 Kbps Each user requires send data at the rate of = 500 kbps As it is circuit switched network we have to dedicate the bandwidth So the

Explain traditional computer clusters, Q. Explain traditional computer clus...

Q. Explain traditional computer clusters? Grid computing employs resources of a lot of separate computers linked by a network (generally internet) to resolve large-scale comput

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd