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

State about movable joystick, State about movable joystick In another t...

State about movable joystick In another type of movable joystick, the stick is used to activate switches that cause the screen cursor to move at a constant rate in the selected

What is function scope, What is Function scope Function scope: A labe...

What is Function scope Function scope: A label is the only part of identifier that has function scope. A label is declared implicitly by its use in a statement. Label names m

How authoring packages supports scripting language, How authoring packages ...

How authoring packages supports scripting language Many authoring packages support a scripting language to allow for even more sophisticated applications to be produced. Scrip

Finite state automaton, Once a finite state automaton (FSA) is designed, it...

Once a finite state automaton (FSA) is designed, its transition diagram can be translated in a straightforward manner into program code. However, this translation process is consid

Explain in details the various standard i/o interfaces, Explain in details ...

Explain in details the various standard I/O interfaces. The various standard I/O interfaces are:  1. The Peripheral component interconnect(PCI) bus is a standard that suppor

Which TTL logic gate is used for wired anding, Which TTL logic gate is used...

Which TTL logic gate is used for wired ANDing ? Ans. Open collector output, TTL logic gate is used.

The color and plot style, Write a script that will make x and y vectors.  T...

Write a script that will make x and y vectors.  Then, it will ask the user for a color ('red', 'blue', or 'green') and for a plot style ('o', '*').  It will then make a string "pst

What is an abstract data type (adt), What is an Abstract Data Type (ADT)? ...

What is an Abstract Data Type (ADT)? Abstract data types or ADTs are a mathematical specification of a set of data and the set of operations that can be done on the data. They

Find simplified function f and implement, Q. Find simplified function F and...

Q. Find simplified function F and implement that function using only NAND gates. 1. F(A,B,C) = (A+B) (A'+B+C') (A'+B'+C') 2. F (A,B,C) = A'B'C'+B'CD'+A'BCD'+AB'C' 3. F(X,Y

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