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

Using the editor or debugger, Write a script that will read from a file x a...

Write a script that will read from a file x and y data points in the following format: x   0    y  1 x  1.3  y  2.2 x  2.2  y  6 x  3.4  y  7.4 The format of each line in the

Explain the working of A/D converter, With the help of a neat diagram, expl...

With the help of a neat diagram, explain the working of a successive approximation A/D converter Ans: Successive Approximation ADC: It is the most broadly used A/D con

Explain the working of a hybrid in telephone networks, How does a hybrid in...

How does a hybrid in telephone networks work ? The circuit operation is as follows: The input signal is coupled to the B and F windings similarly. By the C winding, the i

Displaying the towers of hanoi solution, Once you have a solution to the To...

Once you have a solution to the Towers of Hanoi problem, we want to improve the display of the solution. The details of the implementation are up to you. At a minimum, your impleme

Determine 127.0.0.1 is which type of address, 127.0.0.1 is a? 127.0.0.1...

127.0.0.1 is a? 127.0.0.1 it is a loop-back address.

What are the advantages of using xml over html, What are the advantages of ...

What are the advantages of using XML over HTML?  The root cause of the problem lies in HTML (Hyper Text Mark-up Language), the defacto standard for web publication. The main pr

What do you mean by shopping bots, Q. What do you mean by shopping bots? ...

Q. What do you mean by shopping bots? ANSWER: A shopping bot or buyer agent is an intelligent agent on a Web site that assists you, the customer, search the products and servic

Draw and elucidate the block diagram 8259, Draw and elucidate the block dia...

Draw and elucidate the block diagram of programmable interrupt controller 8259. The 8259A adds 8 vectored priority encoded interrupts to microprocessor. It can be expanded to 6

Explain about dual in line memory modules, Q. Explain about Dual In line Me...

Q. Explain about Dual In line Memory Modules? A DIMM is capable of delivering 64 data bits right away. Usual DIMM capacities are 64MB and up. Every DIMM has 84 gold patted conn

What is cache memory, What is cache memory? The small and fast RAM unit...

What is cache memory? The small and fast RAM units are known as caches. When the implementation of an instruction calls for data located in main memory, the data are obtained a

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