Dell PowerEdge M710HD Manuel d'utilisateur télécharger pdf (Page 4)

 Page2



History

Inthemid‐1990sduringthedevelopmentofIntel’sItanium‐basedsystem,PCBIOSlimitations(forexample,16‐bit

processormode,1MBaddressablespace,PCAThardwaredependencies,etc.)hinderedplatformdevelopmentfor

Itanium.WhiletheItaniumchipwasnotwellreceived,thedevelopmentexposedsignificantlimitationstothe

originalPCfirmwarearchitecturethatledtothedevelopmentofanewframework,calledExtensibleFirmware

Interface(EFI).

In2005,severalleadingtechcompaniescametogethertocreatetheEFIForum.BasedonEFIarchitecture,the

UEFIForum’smissionwastocreatethefirsteverindustrystandardfirmwareinterfacespecification–Unified

ExtensibleFirmwareInterface(UEFI).DellisrepresentedontheboardofdirectorsoftheUEFIForum.

WhatisUEFI?

TheUEFIspecificationdefinesaninterfacebetweenoperatingsystemsandplatformfirmware.Theinterface

consistsofdatatablesthatcontainplatform‐relatedinformation,plusbootandruntimeservicecallsthatare

availabletotheoperatingsystemanditsloader.

Together,theseprovideastandard,modern

environmentforbootinganoperatingsystemand

runningpre‐bootapplications.

Inadditiontotheservices,UEFIdefinesvarious

protocols/APIstoaccessvarioushardwareandthe

bootdevicesinthesystem.TheUEFIspecificationalso

definesadrivermodelthatisgenericandcanbe

adaptedtoanytypeofbusordevice.TheUEFIDriver

Model

isdesignedtosupporttheexecutionof

modularpiecesofcode,knownasdrivers,thatrunin

theprebootenvironment.Thesedriversmaymanage

orcontrolhardwarebusesanddevicesonthe

platform,ortheymayprovidesomesoftware‐derived,

platform‐specificservice.

Thereare3typesofentitiesthatcan

executeunderUEFIenvironment:



• Applications:SomeexamplesofcommonEFIapplicationsincludetheEFIshell,EFIshell

commands,flashutilities,anddiagnosticutilities.ItisperfectlyacceptabletoinvokeEFI

applicationsfrominsideotherEFIapplications.



• OperatingSystemLoader:AspecialtypeofEFIapplication,calledan

operatingsystemboot

loader,providesthenecessaryinitializationroutinesuntilthethisloaderhassetupenoughof

theoperatingsysteminfrastructuretobereadytoassumeownershipofthesystemresources.

Oncetheoperatingsystemassumescontrol,theEFIcorefreesallofitsboottimeservicesand

drivers,

leavingonlytherun‐timeservicesanddrivers.



• Drivers:EFIdriversdifferfromEFIapplicationsinthatthedriverstaysresidentinmemoryunless

anerrorisreturnedfromthedriver'sentrypoint.TheEFIcorefirmware,thebootmanager,or

otherEFIapplicationsmayloaddrivers.

1 2 3 4 5 6 7 8 9

Commentaires sur ces manuels

Pas de commentaire

Dell PowerEdge M710HD Manuel d'utilisateur Page 4

Commentaires sur ces manuels

Produits connexes et manuels pour Ordinateurs Dell PowerEdge M710HD