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

How to modify or delete a custom class name, 1. Click Tools > General Optio...

1. Click Tools > General Options, and then click the Object Mapping tab. 2. From the Object type list, select the standard object type that is associated with the object class

Convert, haw to convert context free grammar to regular grammar

haw to convert context free grammar to regular grammar

The six various application of stack, The six several application of stack ...

The six several application of stack in computer application is: 1.  Conversion of infix to postfix notation and vice versa. 2.  Evaluation of arithmetic expression. 3.

What are controls and how to use them, What are controls? How to use them? ...

What are controls? How to use them? Give examples for control. Controls are objects that can be placed in a form. The dissimilar controls are available in the Tool Box. After

Explain the basic syntactic constructs through reductions, Recognition of b...

Recognition of basic syntactic constructs through reductions, this task is performed by? By Syntax analysis, recognition of fundamental syntactic constructs through reductions

Define radix base, Define Radix (or)Base. A number system of base or ra...

Define Radix (or)Base. A number system of base or radix is a system that uses different symbols for r digits. Numbers are shown by a string of digit symbols. To verify the quan

What are the reasons for feedback in a control system, Question: a) Wha...

Question: a) What are the reasons for feedback in a control system? b) What are the roles of the configuration and fault managers in a real-time system? c) What are stimu

Explain the action of an interrupt processing routine, Explain the action o...

Explain the action of an interrupt processing routine? Action of an interrupt processing routine is as follows : 1. Save contents of registers of CPU. This action is not e

What are the advantages of carrying out simulations, What are the Advantage...

What are the Advantages of carrying out simulations -  saves cost (instead of doing the real thing) -  Safer (scenarios tried out on the simulation first before used in real

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