US20010042242A1

US20010042242A1 - Arrangements offering firmware support for different input/output (i/o) types

Info

Publication number: US20010042242A1
Application number: US09/223,808
Authority: US
Inventors: Andrew J. Fish; Yan Li
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-31
Filing date: 1998-12-31
Publication date: 2001-11-15
Anticipated expiration: 2018-12-31
Also published as: US6401201B2

Abstract

The invention is a system, a method of operating the system and a method of customizing a processing system to operate with different input/output (I/O) systems. A system in accordance with the invention includes a processor, an I/O system coupled to the processor and system firmware, including a plurality of parts which each operate to perform system firmware functions required for and customized to only one of a plurality of different I/O systems which are operational when coupled to the processor, and a storage coupled to the processor, for storing identifying information which, when read, causes only one of the parts of the system firmware to be executed by the processor to perform the system firmware function necessary to operate the one of the different I/O systems identified by the identifying information.

Description

FIELD

The present invention relates to system firmware arrangements adaptable to diverse types of devices.

BACKGROUND

Firmware typically is hardware specific and must completely match hardware installed within a particular system. However, it has been found that, occasionally, there may be times where it is advantageous to change and/or add hardware within a system. Any change in hardware in the system typically requires a corresponding change of firmware. Previously, upgrading of firmware required obtaining and then physically replacing at least one semiconductor chip (i.e., firmware chip). Some newer systems have disk-loaded firmware that is somewhat easier/cheaper to upgrade (e.g., can be downloaded from the Internet). However, such updating procedures may still be too confusing and/or cumbersome to an average user.

SUMMARY

A system embodiment includes an input/output (I/O) system, and system firmware including a plurality of parts which each operate to perform system firmware functions customized to at least one type of connectable I/O device, and an identifier adapted to store identifying information which identifies installed I/O devices, and which is useable to designate a part of the system firmware to be executed by the processor to perform a system firmware function necessary to operate installed I/O devices.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and a better understanding of the present invention will become apparent from the following detailed description of exemplary embodiments and the claims when read in connection with the accompanying drawings, all forming a part of the disclosure hereof this invention. While the foregoing and following written and illustrated disclosure focuses on disclosing example embodiments of the invention, it should be clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of the present invention being limited only by the terms of the appended claims. [0004]
The following represents brief descriptions of the drawings, wherein: [0005]
FIG. 1 illustrates an example block diagram of an example processing system useful for background discussions; [0006]
FIG. 2 illustrates an example block diagram of an example processing system in accordance with the present invention; [0007]
FIG. 3 illustrates an example block diagram of an example embodiment of system firmware which may be utilized in FIG. 2; [0008]
FIG. 4 illustrates an example block diagram of an example processing system in accordance with the present invention; [0009]
FIG. 5 illustrates an example block diagram of an example processing system in accordance with the present invention; [0010]
FIG. 6 illustrates an example block diagram of yet another example processing system in accordance with the present invention; and [0011]
FIG. 7 illustrates an example block diagram of an example table useable with the embodiment of FIG. 2.[0012]

DETAILED DESCRIPTION

Before beginning a detailed description of embodiments of the subject invention, mention of the following is in order. When appropriate, like reference numerals and characters are used to designate identical, corresponding or similar components in differing figure drawings. Further, in the detailed description to follow, although exemplary components are given, the present invention is not limited to the same. Next, known power connections and/or other connections (e.g., signal lines) are not shown within the Figs. for simplicity of illustration and discussion, as so as not to obscure the invention. Finally, while example embodiments of the present invention are described with respect to an input/output (I/O) arrangement and I/O devices, the present invention is not limited to use with such arrangements, and may be used in differing arrangements within a processing system. [0013]
Turning now to detailed discussion, FIG. 1 illustrates an example block diagram of an [0014] example processing system 10, useful in describing background disadvantages before discussion of example embodiments of the invention. The example system includes a processor unit (PU) 12 which may be any processor, with such PU 12 being coupled to a bus and bus controller 14 of any design. Random access memory (RAM) 16 is coupled to the bus and bus controller 14. An I/O controller 18 is coupled to the bus and bus controller, and to at least one I/O device 20′. The system 10 includes system firmware 22 which is customized to control operations of the processing system and to work with the architectures of the processing system, e.g., bus and bus controller 14, I/O controller 18 and I/O device(s) 20′. While the firmware 22 in the FIG. 1 example embodiment is illustrated as being coupled to the I/O controller 18, such firmware may alternatively be coupled to any one of a plurality of other possible addressable locations in the system architecture. More particularly, the possible locations are any address in the address space of the system.
In the FIG. 1 example, the I/[0015] O controller 18 and I/O device(s) 20′ may be provided in any one of a large number of diverse possible configurations. For example, in considering the possibilities of just the I/O device(s) 20′ alone, a plurality of differing I/O device(s) 20′ may be provided within a system, and at least some of the differing I/O device(s) 20′ may be of differing I/O device types. For purposes of this disclosure, differing I/O device types will be each be generically referred to using alphabetical tags or designations, such as type A, type B . . . type N. However, embodiments of the present invention are not limited to alphabetical designation, e.g., embodiments of the present invention could just as easily be implemented using numeric and/or alpha-numeric tags or designations.
Firmware difficulties, such as accommodating differing types of I/O devices, are encountered at all equipment distribution levels. For example, original equipment manufacturers (OEMs) and/or equipment installers sometimes have difficulties obtaining and providing proper firmware which works properly with a particular system configuration (e.g., I/O devices). Such may create or magnify time-to-market (ttm) delays and/or installation delays. At the consumer level, newly purchased systems at first typically do not have a system firmware problem because newly purchased systems typically come with a predetermined hardware (e.g., I/O device) configuration, and have system firmware uniquely written (i.e., customized) to the predetermined hardware configuration. However, any hardware (e.g., I/O device) change or addition resulting in configuration modification may cause the system firmware to need to be correspondingly updated. As mentioned previously, updating of system firmware may be too expensive, too confusing and/or cumbersome to an average user, and often results in substantial problems/delays in getting a processing system to work properly again after even slight modification. All of the above problems/delays are at least inconvenient, and are more probably disruptive and costly, especially in a business environment. [0016]
As a result of such disadvantages, it is desirable for hardware manufacturers, e.g., manufacturers of I/O device(s) [0017] 20,′ to avoid having installation of their devices require substantial user work in providing/updating system firmware 22. FIG. 2 illustrates an example embodiment of an example processing system 30 in accordance with the present invention, which mitigates or obviates work in providing/updating firmware. The PU 12, bus and bus controller 14, RAM 16, I/O controller 18, and I/O device(s) 20′, may be the same as those of FIG. 1, and accordingly redundant description thereof is omitted herein for 15=sake of brevity. Instead, discussion turns to a first example firmware and/or I/O hardware arrangement useable in the example embodiment of the present invention.
More particularly, in the practice of differing hardware configurations (e.g., differing I/O devices), some firmware portions may be mutually useable in common for all (or for at least a portion of) the differing configurations, while other respective firmware portions may each be customized for use with one or several of the respective differing configurations (while not being used with others). Accordingly, FIG. 3 represents an example embodiment of a [0018] system firmware 26, having a modular firmware layout which accommodates (i.e., provides) both common firmware portions and customized firmware portions in differing accessible areas. More particularly, area 40 stores common firmware portions, whereas area 42 stores a plurality of customized firmware portions for a plurality of hardware types. For example, area 42 may contain custom firmware portion A which supports functionality/operation of type A I/O device(s), custom firmware portion B which supports functionality/operation of type B I/O device(s), . . . and custom firmware portion N which supports functionality/operation of type N I/O device(s). Each customized firmware portion may be provided in a differing sub-area of the area 42, and may be accessed and executed separately from all of the other customized firmware portions. Again, embodiments of the present invention are not limited in that N can be of any number of custom firmware portions, although an available storage capacity size and/or financial cost allotted to the system firmware 26 may be somewhat prohibitive.
The [0019] system firmware 26, which is coupled to the I/O controller, may be stored in a storage device of the non-volatile type such as a FLASH memory, but embodiments of the present invention are not limited thereto. Instead the system firmware 26 may alternatively be stored in a read-only memory (ROM), non-volatile RAM (NVRAM), hard-disk (HD), etc.
Turning now to further elaboration of the [0020] system firmware 26, the common firmware portions within area 40 may be accessed and executed upon every system initialization (e.g., before access/execution of any customized firmware portions), irrespective of which type of I/O device(s) 20′ (or 20) is coupled within the system configuration. In contrast, only a selected one or ones of the customized firmware portions within area 42 may be executed upon system initialization (e.g., after access/execution of the common firmware portions).
More specifically, embodiments of the present invention have arrangements which determine (e.g., during initialization) which particular type(s) of I/O device(s) [0021] 20′ (or 20) are installed within the system configuration, and utilize such information to access and execute the one or ones of the customized firmware portions corresponding to (i.e., required for use with) the type(s) of I/O device(s) 20′ (or 20) installed in the system. As one example of the selective utilization of the custom firmware, if at least one (i.e., one or more) of the installed I/O device(s) 20′ is a B type I/O device, then a B customized system firmware portion would be accessed and executed during system initialization.
Returning to FIG. 2, discussion turns next to [0022] example storage 24, with example details of storage 24 being shown in FIG. 7. More particularly, in one example embodiment, the storage 24 stores identifying information which identifies the type(s) of hardware (e.g., I/O device(s) 20′ or 20) installed within the processing system and identifies the firmware portions which should be executed, i.e., the processing system may access the storage (e.g., during initialization) to determine which custom firmware portions should be accessed and executed. The identifying information may stored in an “Installed I/O Device(s) Identifier” area of the storage 24 through any suitable process. For example, an original processing system manufacturer may store such identifying information within the storage 24 once the processing system has been finally configured with I/O device(s) immediately before shipment/delivery. The FIG. 7 example illustrates type C and type H I/O devices being indicated as being installed within the processing system.
The [0023] storage 24 may additionally have a cross-reference table for using the identifying information to determine which one(s) of the custom firmware portions should be executed for each differing type of possible I/O devices. More particularly, the FIG. 7 example illustrates a “Cross-Reference Table” having entries designating differing possible types of I/O devices in a “Type I/O Device” column, and further pointer entries (e.g., unique IDs or addresses) in a “Pointer(s)—Access/Exec.” column designating corresponding firmware portions which should be accessed/executed. Note that for installed type C I/O device(s), corresponding pointers (also represented figuratively by the FIG. 2 long/short dashed arrow 27) indicate that the common firmware portions and C custom firmware portions should be accessed and executed. For installed type H I/O device(s), the pointers indicate that the common firmware portions and both the B and H custom firmware portions should be accessed and executed. Note that the type H example shows that multiple custom firmware portions may be accessed and executed for some types of I/O devices.
More particularly, the type H example shows that the custom firmware portions are not limited for use only with their own designated type of I/O device(s). As a differing example of overlapping use of the custom firmware portions, the custom firmware portions for the differing types of I/O device(s) may be arranged in a predetermined order, and then both a custom firmware portion corresponding to an installed I/O device(s) and all lower ordered custom firmware portions may be cumulatively be used by the system to support an installed I/O device(s). For example, if the custom firmware portions are arranged in the alphabetical order of A, B, C, . . . N, and a type C I/O device(s) is installed, then the system would cumulatively access and execute all of the A, B and C custom firmware portions. In contrast, if a type B I/O device(s) is installed, then the system would cumulatively access and execute only the A and B custom firmware portions. [0024]
During initialization, for example, execution of the common firmware portions by the processor accesses the identifying information stored in the [0025] storage 24, and thereafter accesses and executes corresponding customized firmware portions identified by the identifying information in storage 24. The system firmware 26 and storage 24 may be collectively viewed as firmware component(s) 19 as shown by the dashed rectangle in FIG. 2, and may be provided via a plurality of separate discrete storage components or as differing storage areas within a singular storage component. Further, the system firmware may at least partially include a basic I/O system (BIOS).
The [0026] storage 24 may also provide additional optional information which is used by the system 30 during operation of the processor 12 and which is accessed when the system is reset. The additional information may be of diverse types and provide mechanisms for supporting different types of system operation as follows. For example, the additional information: may relate to a chipset used by the I/O controller 18 which is used by the processor 12 during operation of the system 30; may be code used by the system 30 during operation of the processor or code used by the bus controller; may encode system responses to system state changes, such as, but not limited to, the system stopping or continuing upon error conditions; may be code modules which support the functioning of hardware coupled to the I/O controller 18 or data identifying information pertaining to the operation of the I/O system; may be wiring information regarding the configuration of the I/O controller, such as expansion slots, interruption lines to expansion slots, and error signals. If the additional information is code used by the bus controller, this code may configure the I/O controller to perform particular functions of the I/O system.
Discussion turns next to FIG. 4 which illustrates other example embodiments of the present invention. More particularly, FIG. 4 is similar to FIG. 2, except that FIG. 4 shows two additional example approaches for accessing and executing proper firmware portions within [0027] system firmware 26. As a first example arrangement, instead of utilizing the “Installed I/O Device(s) Identifier” area of the storage 24, one or more of the installed I/O device(s) may itself alternatively contain and provide an identifier. More particularly, such identifier may be stored in any suitable storage 21 (e.g., ROM) on the I/O device(s) 20, and may be supplied (represented figuratively by the FIG. 4 long/short dashed arrow 25) to the storage 24. More specifically, such identifier may be supplied from storage 21 to storage 24 at occurrence of a next succeeding initialization process after the I/O device(s) 20 has been installed, and may also thereafter be stored within the “Installed I/O Device(s) Identifier” area of the storage 24. Alternatively, such identifier may be supplied from storage 21 to storage 24 at every occurrence of the initialization process. The identifier is used to access the “Cross-Reference Area” for corresponding pointers, and then the pointers are again used to access and execute appropriate firmware to support the installed I/O device(s) 20.
Turning now to another alternative FIG. 4 embodiment, instead of utilizing any of the “Installed I/O Device(s) Identifier” area of the [0028] storage 24, the “Cross-Reference Area” or the identifier within the I/O device(s) 20, one or more of the installed I/O device(s) 20 may alternatively itself contain a pointer(s). Such pointer(s) may be stored in any suitable storage 21 (e.g., ROM) on the I/O device(s) 20, and is supplied (represented figuratively by the FIG. 4 dotted arrow 23) to the system firmware 26. More specifically, such pointer may be supplied from storage 21 to system firmware 26 at every occurrence of the initialization process, and used to access and execute appropriate firmware to support the installed I/O device(s) 20.
The example FIGS. 2 and 4 embodiments are advantageous in that they allow [0029] generic system firmware 26 and storage 24 components to be mass produced and/or generically programmed with universal common firmware portions, custom firmware portions and “Cross-Reference Table” which can versatilely accommodate all presently known (e.g., as of the date of manufacture) hardware components (e.g., I/O device(s) 20′ or 20). Further, if the firmware 26 and storage 24 components are provided as a FLASH memory component(s), such can be arranged to be easily reprogrammed and upgraded (e.g., via Internet and/or disk firmware downloading) to support any later generation I/O device(s).
FIG. 5 is another example embodiment of the present invention. More particularly, the FIG. 5 example embodiment is advantageous in situations where, for example, the [0030] system firmware 26 and/or storage are firmware inadequate for (become outdated and/or do not support) a particular (e.g., next generation) I/O device(s) 20″. The FIG. 5 embodiment, at minimum, is different from the FIGS. 2 and 4 embodiments in that the FIG. 5 I/O device(s) 20″ uses on-board storage 29 which stores and supplies its own custom firmware and or other data (rather than using preexisting custom firmware and data within the system firmware 26 and storage 24).
More specifically, such on-board (i.e., “owned”) custom firmware and data may be supplied from storage [0031] 29 (e.g., to the system) at occurrence of a next succeeding initialization process after the I/O device(s) 20″ has been installed, and such owned custom firmware and data may thereafter be stored in an appropriate storage(s) in the system (e.g., added to the system firmware 26 and/or storage 24). Alternatively, such owned custom firmware and data may be supplied from storage 29 to the system at every occurrence of the initialization process. Such embodiment is advantageous in that it mitigates or obviates any firmware updating work required of a user, while allowing the system to accommodate and/or update to unknown and/or next generation hardware (e.g., I/O device(s) 20″).
Embodiments of the present invention are applicable to not only personal computers (PCs), but to other processing systems such as servers. For example, the FIG. 6 example embodiment shows an arrangement of a plurality of I/[0032] O cards 50, each having the firmware component(s) 19 and being coupled to a PU memory complex. The plurality of memory cards 50 may have additional components such as a Programmable Interrupt Device (PID), Super I/O (SIO) and provide I/O slots. The firmware component(s) 19 may be a non-volatile random access memory (NVRAM) or any other non-volatile storage. Further, the firmware component(s) 19 may be part of the hardware platform, and may define all platform specific information about the hardware. Such allows a standard BIOS to understand and program the new hardware without requiring user customizations. As yet more examples the firmware component(s) 19 may contain standardized binary code modules and data structures, so the firmware component(s) 19 may be implemented as hardware independent of a BIOS. Still further, the firmware component(s) 19 may contain binary code to interface to server management hardware, to support on-board PCI device option ROMs, and any other code that is required to make the system modular. Finally, the firmware component(s) may also contain data such as a number of I/O components in the system.
In addition to the embodiments of the present invention being useful in situations wherein a processor modification is made some time after purchase, a universal or standard firmware which versatilely supports installation of different processors would permit hardware platforms to be assembled without requiring firmware change. [0033]
This concludes the description of the preferred embodiments. Although the present invention has been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More particularly, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the appended claims without departing from the spirit of the invention. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.[0034]

Claims

What is claimed is:

1. A system comprising:

an input/output (I/O) system, and system firmware including a plurality of parts which each operate to perform system firmware functions customized to at least one type of connectable I/O device, and an identifier adapted to store identifying information which identifies installed I/O devices, and which is useable to designate a part of the system firmware to be executed by the processor to perform a system firmware function necessary to operate installed I/O devices.

2. A system in accordance with

claim 1

wherein:

the system firmware includes a common part which performs system firmware functions required for all of the connectable I/O devices.

3. A system in accordance with

claim 1

wherein:

the identifying information is accessed when the system is initialized.

4. A system in accordance with

claim 2

wherein:

the common part of the system firmware accesses the identifying information when the system is initialized and the processor executes the common part and the part of the system firmware identified by the identifying information for the coupled subset of the connectable I/O systems.

5. A system in accordance with

claim 1

further comprising:

a bus controller coupled to the processor and to the I/O system and wherein the system firmware is coupled to the I/O system.

6. A system in accordance with

claim 2

further comprising:

7. A system in accordance with

claim 3

further comprising:

8. A system in accordance with

claim 4

further comprising:

9. A system in accordance with

claim 1

where:

the storage further stores additional information used by the system during operation of the processor which is accessed when the system is initialized.

10. A system in accordance with

claim 9

wherein the additional information comprises:

information relating to a chipset used in the coupled I/O system which is utilized by the processor during operation of the system.

11. A system in accordance with

claim 9

wherein:

the storage stores additional information used by the system comprising code used by the system during operation of the processor.

12. A system in accordance with

claim 9

further comprising:

a bus controller coupled to the coupled I/O system; and wherein the additional information is code used by the bus controller.

13. A system in accordance with

claim 9

wherein:

the additional information comprises system responses to system state changes.

14. A system in accordance with

claim 1

wherein:

the storage contains code modules which support the functioning of hardware coupled to the coupled I/O system.

15. A system in accordance with

claim 1

wherein:

the storage contains data identifying information pertaining to the operation of the I/O system coupled to the system.

16. A system in accordance with

claim 1

wherein:

the system firmware is a BIOS.

17. A method of operating a system including a processor and of a plurality of different input/output (I/O) systems which each require a customized system firmware when coupled to the system to be executed by the processor, said method comprising the steps of:

providing a system firmware, including a plurality of parts which each operate to perform system firmware functions required for and customized to only a subset of connectable I/O systems;

providing a storage, which is coupled to the system storing identifying information which identifies a coupled subset of the connectable I/O systems, when read, causes the processor to execute a part of the code within the system firmware to operate the system with the system firmware customized to an identified coupled subset of the connectable operating systems; and

reading the identifying information and executing the part of the code within the system firmware to operate the system with the system firmware customized to the coupled subset of the connectable I/O system.

18. A method in accordance with

claim 17

wherein:

the system firmware includes a common part which performs system firmware functions required for all of the connectable I/O systems and the plurality of parts.

19. A method in accordance with

claim 18

wherein:

the common part of the system firmware accesses the identifying information when the system is turned on and the processor executes the common part and the part of the system firmware identified by identifying information for the coupled subset of the connectable I/O systems.

20. A method in accordance with

claim 17

wherein:

21. A method in accordance with

claim 20

wherein:

the storage stores additional information relating to a chipset used in the coupled I/O system which is utilized by the processor during operation of the system.

22. A method in accordance with

claim 17

wherein:

23. A method in accordance with

claim 17

further comprising:

a bus controller coupled to the coupled I/O system; and wherein

the additional information is code used by the bus controller.

24. A method in accordance with

claim 17

wherein:

the additional information comprises system responses to system state changes.

25. A method in accordance with

claim 17

wherein:

the system firmware is a BIOS.

26. A method of customizing a processing system to operate with connectable I/O systems each of which require a customized system firmware, the method comprising the steps of:

providing the processing system with a system firmware containing code which, when selected, supports operation of each of the connectable I/O systems; and

providing each of the I/O systems with stored identifying information which when each I/O system is individually coupled to the processing system is read by the processing system causing the processing system to select code within the system firmware to support operation of the coupled I/O system.

27. A method in accordance with

claim 26

wherein:

the system firmware is a BIOS.