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

Explain the quantization error of an ADC, Explain the Quantization error...

Explain the Quantization error of an ADC. Ans. Quantization error- An analog voltage is within the range of 0 to 1V and for 3 bit output, the size of all intervals are

What is the difference between a structure and a table, What is the differe...

What is the difference between a structure and a table? Structures are constructed the almost the similar way as tables, the only dissimilarity using that no database table is

Name the 7400 series TTL chip, Name the 7400 series TTL chip which is a pri...

Name the 7400 series TTL chip which is a priority encoder. Write its truth table.  Ans. Available IC in 74 series is 74147 that is a priority encoder. Such I

Explain about control memory organization, Q. Explain about Control Memory ...

Q. Explain about Control Memory Organization? One of the simplest ways to organize control memory is to organize micro-instructions for different sub cycles of machine instruct

Explain high level data link control, Explain High Level Data Link Control....

Explain High Level Data Link Control. HDLC - it is High Level Data Link Control: Protocol Overall explanation: Layer 2 of the OSI model is the data link layer. One of the

What do conditional assignments get inferred into, What do conditional assi...

What do conditional assignments get inferred into? Conditionals  in  a  continuous  assignment  are  specified  through  the  "?:"  operator.  Conditionals  get inferred into a

What is an orthogonal base class in c++, If two base classes have no overla...

If two base classes have no overlapping methods or data they are said to be independent of, or orthogonal to each other. Orthogonal in the sense means that two classes function in

Show the decimal representation in computers, Binary number system is most ...

Binary number system is most common for computer due to two stable states of its components. However unfortunately this isn't a very natural system for us as we deal with decimal n

Data structures.., in asingle function declaration what is maximum no of st...

in asingle function declaration what is maximum no of statements that may be recursive calls

Determine a program that is in execution, Determine a program that is in ex...

Determine a program that is in execution is known as Program in execution is known as Process

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