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

Build a tv remote control, Communication by devices, such as the HC11 proce...

Communication by devices, such as the HC11 processor, is a key and vital part of most systems that are used in military, commercial, and academic settings.  In fact, most of these

What are the advantages of CMOS logic, What are the advantages of CMOS logi...

What are the advantages of CMOS logic Ans: Advantages of CMOS Logic: (i) The power dissipation is mini-mum of all the logic families (ii) LSI and VLSI are possible

Managerial benefits, MANAGERIAL BENEFITS Implement integrated relia...

MANAGERIAL BENEFITS Implement integrated reliability engineering and product assurance program in all aspects of the product life-cycle, covering purchase, engineering, R&D

Perform binary addition, Q. Explain the following: a. BCD code b. Gra...

Q. Explain the following: a. BCD code b. Gray code c. Excess-3 code d. True complement method Q. Addition-Subtraction-Multiplication-Division: Perform Binary Addi

Events by which we can program "help texts", What are the events by which w...

What are the events by which we can program "help texts" and display "possible value lists"? -PROCESS ON HELP-REQUEST (POH). -PROCESS ON VALUE-REQUEST (POV).

Explain that datagram cannot be larger than mtu of a network, "A datagram c...

"A datagram cannot be larger than the MTU of a network over which it is sent." Is the statement true or false? Explain with the help of a suitable example. All hardware technol

Why we need to construct state transition diagram, Why we need to construct...

Why we need to construct state transition diagram Basically you need to construct a state transition diagram for each object with important behaviour. You need not construct on

What are the features of the hardwired control, What are the features of th...

What are the features of the hardwired control? A controller that uses this approach can function at high speed. It has little flexibility and the complexity of the instruction

Determine the maximum amplitude of delta modulator, (a) Consider a sinusoid...

(a) Consider a sinusoidal signal m(t) = A cos(2πfmt) applied to a delta modulator with step size Δ. Determine the range of the step size so that slope overload will be avoided. Ass

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