Object-oriented booting framework

• US 5,574,915 A
• Filed: 12/21/1993
• Issued: 11/12/1996
• Est. Priority Date: 12/21/1993
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Taligent, Inc. (HP Inc.)
• Inventors: Lemon, Steven P., Ross, Patrick D.
• Primary Examiner(s): Heckler, Thomas M.
• Application Number:
  US08/171,595
• Time in Patent Office: 1,057 Days
• Field of Search: 395/650, 395/700
• US Class Current: 712/220
• CPC Class Codes: G06F 9/4411 Configuring for operating with peripheral devices; Loading of device drivers

Abstract

An object-oriented framework contains program code for booting a processor with a volatile storage from an attached non-volatile storage. The framework provides a hardware independent boot image base class which can be subclassed to provide boot image program code for each specific hardware configuration. The boot image program code performs low level tasks such as determining the hardware configuration and loading kernel code into the volatile memory. Once the kernel has been loaded into memory it is initialized using the configuration information to provide a hardware-independent platform. Further non-subclassable code is used to establish support for accessing object-oriented shared libraries in the non-volatile storage. Finally an object-oriented environment is established by instantiating a file object from the shared libraries.

Claims

1. An apparatus for booting an object-oriented operating system comprising a kernel program and a plurality of shared libraries containing hardware-independent, object-oriented programs onto a computer system comprising a plurality of hardware devices connected in a configuration, the apparatus comprising:

(a) a processor;

(b) a volatile storage attached to and under the control of the processor;

(c) a non-volatile storage attached to and under the control of the processor, the non-volatile storage having the kernel program, the plurality of shared libraries and a hardware-specific boot image program stored therein;

(d) boot image delivery means for loading the boot image program from the non-volatile storage into the volatile storage;

(e) framework setup means for causing the processor to execute the boot image program to load the kernel program from the non-volatile storage into the volatile storage, to determine the configuration of the plurality of hardware devices and to generate configuration data in a universal format; and

(f) framework execution means for causing the processor to initialize the kernel with the configuration data, to start a program which provides paging between the volatile storage and the non-volatile storage and to instantiate an object oriented file system from the shared libraries.

2. Apparatus as recited in claim 1, wherein the boot image program comprises a plurality of boot files and wherein the apparatus includes:

(a) boot start means for determining which boot files stored in the non-volatile storage comprise the boot image program and

(b) means for determining the configuration of the plurality of hardware devices.

3. The apparatus of claim 2 wherein each of the plurality of boot files comprises a file handle and wherein the framework execution means further includes means for using file handles of the plurality of boot files comprising the boot image program in the kernel program so that the kernel program fits into a smaller part of the volatile storage.

4. Apparatus as recited in claim 1, including operating system support for System 7, OS/2, DOS, and UNIX.

5. The apparatus of claim 1 wherein the framework setup means includes means for generating a stack and wherein the framework execution means includes means for providing a file system interface to the non-volatile storage.

6. A method for booting an object-oriented operating system comprising a kernel program and a plurality of shared libraries containing hardware-independent, object-oriented programs onto a computer system with a processor, a volatile storage attached to and under control of the processor, a non-volatile storage attached to and under control of the processor and a plurality of hardware devices connected in a configuration, the non-volatile storage having the kernel program, the plurality of shared libraries and a hardware-specific boot image program stored therein and the method comprising the steps of:

(a) loading the boot image program from the non-volatile storage into the volatile storage;

(b) executing the boot image program to load the kernel program from the non-volatile storage into the volatile storage, to determine the configuration of the plurality of hardware devices and to generate configuration data in a universal format; and

(c) initializing the kernel with the configuration data, to start a program which provides paging between the volatile storage and the non-volatile storage and to instantiate an object oriented file system from the shared libraries.

7. A method as recited in claim 6, wherein the boot image program comprises a plurality of boot files and wherein the method includes the steps of:

(d) determining which boot files stored on the non-volatile storage comprise the boot image program; and

(e) determining the configuration of the plurality of hardware devices.

8. The method of claim 7 wherein each of the plurality of boot files comprises a files handle and wherein step (d) includes the step of using file handles of boot files comprising the boot image program in the kernel program so that the kernel program fits into a smaller part of the volatile storage.

9. The method as recited in claim 6 including the step of supporting System 7, OS/2, DOS, and UNIX.

10. The method of claim 6 wherein step (b) includes the step of providing a stack and wherein step (c) includes the step of providing a file system interface to the non-volatile storage.

11. A booting framework stored on a computer-readable medium for booting an object-oriented operating system comprising a kernel program and a plurality of shared libraries containing hardware-independent, object-oriented programs onto a computer system comprising a volatile storage, a non-volatile storage and a plurality of hardware devices connected in a configuration, the framework comprising:

(a) subclassable boot image class information comprising information defining a data structure for holding references to a plurality of boot program files and program code defining member functions for adding boot program files to, and deleting boot program files from, the data structure and a member function for checking that the plurality of boot program files includes at least a hardware-dependent boot image delivery program for loading the boot files from the non-volatile storage into the volatile storage and a hardware-dependent boot setup program for loading the kernel program from the non-volatile storage into the volatile storage, for determining the configuration of the plurality of hardware devices and for generating configuration data in a universal format; and

(b) non-subclassable boot execution class information including program code for initializing the kernel with the configuration data, for instituting paging between the volatile storage and the non-volatile storage and for instantiating a file system object from the shared libraries.

12. A booting framework as recited in claim 11 wherein the boot execution class information includes system genesis program code for generating a boot content server for managing files contained in the boot image program.

13. A booting framework as recited in claim 12 wherein the system genesis program code includes nublibrary program code having runtime routines, runtime servers and shared system libraries for supporting the shared libraries in the non-volatile storage.

14. A booting framework as recited in claim 13 wherein the boot execution class information further includes program code for a boot conductor program started by the system genesis program code and containing program code that is responsive to the program code present in the boot image program, the hardware configuration and the contents of the shared libraries for instantiating a file object to allow access to the shared libraries in the non-volatile storage.

15. A booting framework as recited in claim 14 wherein the boot conductor program contains program code to creating a library searcher for searching files in the non-volatile storage to locate shared libraries.