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

The advantage of using a database management system, The advantage of using...

The advantage of using a Database Management System The advantage of using a Database Management System for a data store is that databases have mechanisms for describing data,

Explain difference between a constant and variable, What is the difference ...

What is the difference between a constant and variable? Explain with example.  A C constant is usually just the written version of a number. For example 1, 0, 5.73, 12.5e9. We

What are instruction hazards, What are instruction hazards? The pipelin...

What are instruction hazards? The pipeline might also be stalled because of a delay in the availability of an instruction. For instance, this may be a result of a miss in the c

What is called that switch if switch capacity is full, When a switch capaci...

When a switch capacity is full, calls coming into that switch are said to be                 . (A)  open                                            (B)  shorted (C) bloc

Arduino Bingo Project., Hello everybody I have a project that is a bingo bo...

Hello everybody I have a project that is a bingo board run by laser pointers, light sensors, and leds. Basically I''m creating a 5 by 5 grid (bingo board) in which each row and col

Perform the subtraction using 1's complement, Perform the subtraction using...

Perform the subtraction using 1's complement of 11001 - 10110 Ans. 11001 - 10110 = X - Y                            X = 11001 1's complement of Y = 01001

What guarantees the integration of all application modules, What guarantees...

What guarantees the integration of all application modules? The R/3 basis system guarantees the integration of all application modules.  The R/3 basis s/w gives the run time e

Kirchoff''s voltage law , Kirc hoff's Voltage Law   The sum ...

Kirc hoff's Voltage Law   The sum of all the voltage drops around a closed circuit loop will add to zero  V1+(-V2)+(-V3)+(-V4)= 0

Why spc is used, SPC is used for (A)  Carrying Exchange Control Functi...

SPC is used for (A)  Carrying Exchange Control Functions (B)  Carrying Subscriber Control Functions (C)  Exchange Hardware (D)  Signalling Purpose Ans:

Data warehouse, 1) Define a job scheduling strategy that will meet business...

1) Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pict

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