Design And Implementation On The UEFI BIOS Shell Under Debugging Tools

With the increasing demand for personal computer, the computer manufacturerincreases constantly too, make the competition between manufacturers more intense, inthe constant improvement and development or maintenance test debug time to speed upthe delivery. The computer system control key--hardware resources access is the entirecomputer system development core technology. There are three methods to realizeaccessing computer hardware resource, respectively is visual access interface, firmware,realization method and prior to operating system hardware access technology.In this thesis,mainly through tools to access of the computer hardware equipment,puts forward a functional debug method under UEFI BIOS Shell environment whencomputer power on, realize without the help of operating system, to access the computerhardware resources situation of software method. This method realized the computerdevelopment or maintenance testers in do not need to operating system under the premiseof deeper levels of access to low-level hardware resources: such as PCI deviceconfiguration register, the keyboard controller, etc., and provides a visual user interface.For the development of the computer system, in-depth understanding of the workingprinciple of the computer hardware, and then to solve the design and maintenance of theproblems appeared in the process to provide a convenient, save the computer productiontesting manpower and peripheral storage fixture cost, make Shell in perform debugprovides a new method, at the same time, it also will be a generated technologydevelopment trend，This thesis chapter8with existing way contrast detailed performanceanalysis..