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 binary number to gray code, Convert the binary number 10110 to ...

Convert the binary number 10110 to Gray code ? Ans. For changing binary number 10110 in its equivalent Gray code the rules are as, the left most bit that is MSB in Gray code is 1

What is monkey testing, What is Monkey testing? The monkey testing is ...

What is Monkey testing? The monkey testing is the process of testing here and there for judging the application trying to observe the accessing dissimilar functionalities is i

Find out the number of control lines for 32 to 1 multiplexer, The number of...

The number of control lines for 32 to 1 multiplexer is ? Ans. For 32 (2 5 ) the number of control lines and to select one i/p between them total 5 select lines are needed.

Discuss different routing plan adopted in telephone network, Discuss differ...

Discuss different Routing plan adopted in a Telephone network. Hierarchical networks are able of handing heavy traffic where needed, and at similar time use minimal number of t

Logic gates required to build a half adder, What are the gates required to ...

What are the gates required to build a half adder ? Ans. The gates needed to build a half adder are EX-OR gate and AND gate as shown below the logic diagram of half adder:

Distinguish between an agent system and an expert system, Problem : (a)...

Problem : (a) The concept of an agent is generally defined by listing the properties that agents exhibit. Identify and describe the properties that you would associate with th

Define interrupt processing, Q. Define Interrupt Processing? On complet...

Q. Define Interrupt Processing? On completion of execution of an instruction machine checks whether there is any pending interrupt request for interrupts which are enabled. If

Explain one dimensional array, Explain one dimensional arrays In one di...

Explain one dimensional arrays In one dimensional arrays array name is really a pointer to the first element in the array. Second element of the array can be accessed by using

What is the maximum frequency of operation, For the circuit demonstrated be...

For the circuit demonstrated below, what is the Maximum Frequency of Operation? Are there any hold time violations for FF2? When yes, how do you modify the circuit to ignore them?

State a simple pull transaction, a. Explain the future of mobile commerce i...

a. Explain the future of mobile commerce in world? b. 'Push and Pull' are two ways of transferring information to and from a phone, through WAP. Now, with the help of diagram, s

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