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

Convert the decimal number to excess-3 code, Convert the decimal number 430...

Convert the decimal number 430 to Excess-3 code ? Ans. Excess  3  is  a  digital  code  acquired  from  adding  3  to  every  decimal  digit  and  after that converting the res

Difference among msgbox statement and msgboxq function, MsgBox is a built i...

MsgBox is a built in VB function which shows a Message Box and MsgBoxQ is a function definite by the user.

How are control signals achieve the particular operation, Q. How are contro...

Q. How are control signals achieve the particular operation? The control signals are applied directly as binary inputs to the logic gates of the logic circuits. All these input

Explain about the modules of magento, Magento supports installation of modu...

Magento supports installation of modules by a web-based interface accessible by the administration area of a Magento installation. Modules are hosted on the Magento eCommerce websi

Explain basic cpu structure, A computer manipulates data consistent with in...

A computer manipulates data consistent with instructions of a stored program. Stored program means that the data and program are stored in same memory unit. Central processing unit

Explain chaining method, Chaining: In this method, instead of hashing func...

Chaining: In this method, instead of hashing function value as location we use it as an index into an array of pointers. Every pointer access a chain that holds the element having

What is the basic workflow order for color match, Question: (a) What is...

Question: (a) What is the difference between the Color Pass and the Color Replace effects? (b) What is the basic workflow order for Color Match? (c) Explain clearly the

How would you kill a process, How would you kill a process? The "kill" ...

How would you kill a process? The "kill" command takes the PID as one argument; this signifies which process to terminate. The PID of a process can be got using "ps" command

Example of unification, Example of Unification: Let now here, assume i...

Example of Unification: Let now here, assume instead that we had these two sentences as:  knows(john,X) → hates(john, X)  knows(jack, mary)  Thus here the predicate n

What is gimps native graphics file format, XCF is GIMP's "native" format. T...

XCF is GIMP's "native" format. This will preserve all information about an image, having the layers.

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