CN1455307A

CN1455307A - Dragon core-1 CPU network computer main board system and reset method

Info

Publication number: CN1455307A
Application number: CN 03140698
Authority: CN
Inventors: 罗海勇
Original assignee: Institute of Computing Technology of CAS
Current assignee: Beijing Skyvein Net Computer Co., Ltd.
Priority date: 2003-06-06
Filing date: 2003-06-06
Publication date: 2003-11-12
Anticipated expiration: 2023-06-06
Also published as: CN100386709C

Abstract

The invention relates to the main board system and the reset method of the networked computers using a kind of 'Longxin'-1 CPU. The system includes the 'Longxin'-1 CPU, the north bridge, south bridge and the basic input/output system. The reset method is as follows. Starting the reset button through the reset generation circuit generates the reset signal sent to the south bridge, making the south bridge be reset. The new reset signal generated by the south bridge is sent to the north bridge, making the north bridge be reset. With the north bridge being reset, the reset signal generated is sent to the 'Longxin'-1 CPU, making the 'Longxin'-1 CPU be reset. The invention not only makes use of the technique adequately but also adopts many new technique and thought creatively. The system possesses high practicability.

Description

Network computer main board system and the repositioning method of a kind of Godson-1CPU

Technical field

The present invention relates to network computer, particularly relate to network computer main board system and the repositioning method of a kind of Godson-1CPU.

Technical background

Network computer is as an important application branch of technical development of computer, in computer networking technology growing today, because it has very high security, be convenient to management, software upgrading and the simple and lower-cost advantage of maintenance, the application prospect at aspects such as Web education, E-Government, ecommerce, electronic farmings more and more is subject to people's attention.

This notion of network computer comes across nineteen nineties, starting point at that time is some equipment (such as hard disk, CD-ROM drive, floppy disk etc.) in the cutting personal computer as far as possible, reduce the cost of computing machine, at personal computer cost at that time than higher period, this thinking has certain meaning, but along with the raising day by day of the PC ratio of performance to price, in the price of PC very low today, from the angle that reduces cost, the advantage of network computer is not too obvious.Growing along with computer network on the contrary, the becoming increasingly conspicuous of safety problem, this moment network computer as safe as a house, be convenient to management, the simple advantage of software upgrading just appears suddenly out.

Have independent intellectual property right, have this consideration of network computer of extremely strong security in line with exploitation, we have designed and developed the network computer mainboard based on Godson-1CPU with own characteristic.

Summary of the invention

The object of the present invention is to provide network computer main board system and the repositioning method of a kind of Godson-1CPU.Network computer mainboard development plan based on Godson-1

Because network computer has very high security of system, uses simple, convenient management, and with low cost, is more and more used at aspects such as Web education and E-Government.Inst. of Computing Techn. Academia Sinica digitizing chamber is under the subsidy of country's " 15 " 863 Program main project, Chinese Academy of Sciences's major project, the calculating problem of innovating, research and developed have autonomous property right, stable performance, safe, cheap, can be widely used in network computer (NC)---sky, Divine Land network of vein network computing machine that the multiple industrial application of information technology of China is built.The present invention has specifically adopted following new technology and thinking:

1, (inventing by calculating, is the universal cpu of MIPS architecture, has applied for national patent, application number: 01135045.8), have high security to have adopted homemade Godson-1CPU;

2, the employing serial ports of computers is debugged system, and is early stage in system start-up, easily the ruuning situation of observing system;

3, adopt low power design technique, the power consumption that makes whole mainboard need not other radiation fin and radiator fan less than 30 watts on the mainboard;

4, display card BIOS (Basic Input or Output System (BIOS)) is incorporated into mainboard BIOS (Basic Input or Output System (BIOS)) lining, makes native system smaller and more exquisite

5, adopt DOC (disk on the sheet) technology, network computer system guiding speed is obviously accelerated;

6, use higher level lanquage-C language to write BIOS (Basic Input or Output System (BIOS)), increase the readability of code, be convenient to debug and the programmer between mutual interchange;

7, in BIOS (Basic Input or Output System (BIOS)) lining emulation based on the video card simulated program of X86 architecture, the video card that this makes other manufacturer's exploitations based on the X86 system, can be before entering linux kernel, video card is lighted, on screen, shown the startup situation of BIOS (Basic Input or Output System (BIOS));

8, the present invention is integrated intelligent card read/write device, it meets ISO 7816-3 character consensus standard (T=0), is used for the safety certification of network computer;

9, integrated intranet and extranet handoff functionalities.By panel button, can realize easily that intranet and extranet switch.

Consider the safety of network computer, we have used the Godson-1CPU with independent intellectual property right, and this is the foundation stone of security of system.Godson-1CPU has following characteristics: the CPU that is domestic 32 RISC of first item (Reduced Instruction Set Computer) structure; Dynamic pipeline technology and superscalar architecture have been adopted; The particularly important is the design of in system hardware, having carried out secure context, make its big class of the criminal of preventing network attack of using the buffer zone overflow technique to carry out effectively, make this a network computer (NC) mainboard have the basis of high-performance, high safety like this.

For the ease of debugging, this mainboard has adopted the adjustment method based on the RS232 interface, before video card point bright display, can export by serial ports, on another computing machine, see the startup situation of BIOS (Basic Input or Output System (BIOS)), also can debug or the like the configuration space of PCI (peripheral element extension interface) etc. simultaneously by serial ports, very convenient.

The present networks computer motherboard has adopted the CPU (Godson-1) based on low power dissipation design, the north bridge BONITO32 of NEC Corporation and these low power consumption integrated circuits such as south bridge VT82C686A of VIA company, make that the power consumption of whole mainboard is extremely low, need not to use heat radiator and fan, the total power consumption of this mainboard is less than 30W, and the design of low-power consumption has further improved the reliability of system.

BIOS (Basic Input or Output System (BIOS)) adopts the SST28SF040 model.

Godson-1 network computer mainboard has used brand-new reset timing method also initiatively.After pressing reset button, through reset generation circuit, produce reset signal, deliver to south bridge (VIA south bridge 686A) earlier, allow south bridge reset; Then, produce a new reset signal from south bridge and deliver to north bridge (the north bridge BONITO32 of NEC Corporation), north bridge is resetted; After north bridge resets, produce a reset signal, pass to Godson-1CPU, allow CPU produce and reset, this mentality of designing is very unique, and whole flow process is very clear, and system sequence is also very clear and definite, is easy to debugging.

We have also creatively used the system architecture of Godson-1CPU+BONITO (north bridge)+VT82C686A (south bridge), this structure has adopted the north and south bridge of different company, especially the south bridge of VIA, it is integrated equipment such as AC97 audio interface, USB (USB (universal serial bus)) interface, ide interface, PS2 interface, parallel port and serial ports, have lower cost, and can satisfy the requirement that network computer is used fully.

In order to protect the intellectual property better; on the network card equipment of this system (93C46); adopted the hardware encipher measure; write specific data recording in the specific memory address; the method that combines by software and hardware; can realize the system encryption visit well, protecting system resources is not subjected to illegal use, safeguards developer's rights and interests.

Because the complicacy of video card design and exploitation, the video card of being developed for compatible video card manufacturer better simultaneously based on the X86 system, in the BIOS of native system (Basic Input or Output System (BIOS)) part, solidified video card simulated program based on X86, the driver based on the video card of X86 system of other manufacturers exploitation before entering linux kernel, just can be lighted video card like this, show the startup situation of BIOS (Basic Input or Output System (BIOS)), allow the user understand the initialization progress of computing machine.In BIOS (Basic Input or Output System (BIOS)) exploitation, we have also adopted the development scheme based on higher level lanquage-C language, its maximum characteristics are to be easy to exploitation and to be convenient to revise, be convenient to exchange between reading and the programmer, we are developed prototype apace, played very big facilitation.In system design, this mainboard adopts 8 and the optional mode of 16 BIOS (Basic Input or Output System (BIOS)), the range of choice that has expanded BIOS (Basic Input or Output System (BIOS)) chip; Simultaneously, system is solidificated in BIOS (Basic Input or Output System (BIOS)) lining to the parameter of SDRAM (synchronous DRAM) and part hardware, like this, seem and reduced the revisable parameter area of BIOS (Basic Input or Output System (BIOS)), but the reliability that has strengthened network computer is (because on network computer, SDRAM, on all integrated mainboard of network interface card and sound card and video card, upgradeable hardware seldom on the mainboard, so the alterability of BIOS (Basic Input or Output System (BIOS)) is unimportant), the user use and safeguard very simple, could give prominence to like this network computer be convenient to the management, be easy to safeguard, safe and reliable maximum characteristics.

Basic Input or Output System (BIOS) (3) is incorporated in the main board system.

The design has adopted DOC (disk on chip) technology, the guiding speed of quickening system, also alleviated load of server simultaneously, on the flash memory (flash) of 64MB, loaded network computer embedded OS (comprising network computer application software and driver), in network computer opening initialization process, directly from the DOC channeling conduct, rather than guide from server, reduce the load of network and server, also accelerated the stability of system start-up speed and startup simultaneously.In addition, on hardware, take measures, after system development is finished, DOC is made read-only form, and like this, the user just can use network computer more reliably, and the content of not worrying DOC is subjected to having a mind to or distorting unintentionally, has strengthened reliability and security that network computer uses.

Network computer mainboard based on Godson-1CPU has also used the measure of other miniaturizations, such as the memory bar that has used 144 line DIMM, crop the parallel port, memory bank and two PCI slots of having kept a serial ports, 144 lines, all these measures make the area of network computer mainboard further reduce.

This piece has adopted 4 layers of PCB (printed circuit board (PCB)) wiring technique based on the network computer mainboard of Godson-1CPU, has reduced the cost of mainboard plate-making, has made things convenient for later batch process.

Description of drawings Fig. 1 is based on the network computer main board system structural drawing of Godson-1CPU; Fig. 2 is Godson-1CPU inner structure block scheme; Fig. 3 is a north bridge BONITO inner structure block scheme; Fig. 4 is a south bridge VT82C686A inner structure block scheme;

Embodiment

Among Fig. 1, GODSON-1 (Godson-1) the 1st, the central processing unit of total system is responsible for the operation of program, and it is the core of system.It communicates by oneself data line and north bridge 2, needs data of handling and the data of having handled, all delivers in the internal memory by north bridge 2.North bridge 2 is responsible for providing the steering logic of internal memory, and is responsible for providing the reset timing of CPU, and also having a critical function is primary controller as PCI equipment.And be mounted with BIOS 3 chips of whole network computer on the local bus on the north bridge 2 (local bus), at the system start-up initial stage, be responsible for the initialization of total systems by BIOS 3.Pci bus on the north bridge 2 (BUS) also is connected to south bridge 4 and other PCI equipment (as video card and network interface card etc.), and north bridge 2 is responsible for the functions such as arbitration on the pci bus as the master controller of pci bus (BUS).And on the south bridge 4 except the hard disk that is connected to ide interface, also be responsible for providing the steering logic of low speed peripherals such as keyboard, mouse, serial ports, parallel port, USB mouth and AC97 6.And intelligent card read/write device is connected on the serial ports, and it can realize reading of smart card information by serial ports and compunication, thereby realizes the safety certification of network computer.

Memory bar 5 uses the interior bar of 144 line DIMM to deposit.The 7th, ide interface.8 is two PCI slots.

The present invention had both utilized prior art fully, but also had creatively adopted many new technologies and new thought, and system has very high practicality.

Claims

1. the network computer main board system of a Godson-1CPU comprises: Godson-1 (1), be connected in north bridge (2), and the central data that is used for total system is handled; North bridge (2) is connected in south bridge (4) and Basic Input or Output System (BIOS) (3), is used for the steering logic of internal memory, and the control of reset timing and the peripheral element extension interface equipment of CPU is provided; Basic Input or Output System (BIOS) (3) is used for whole initialization; South bridge (4) is used for the steering logic of low speed peripherals.

2. according to the network computer main board system of the Godson-1CPU of claim 1, it is characterized in that north bridge (2) adopts BONITO32.

3. according to the network computer main board system of the Godson-1CPU of claim 1, it is characterized in that Basic Input or Output System (BIOS) (3) adopts SST28SF040.

4. according to the network computer main board system of the Godson-1CPU of claim 1, it is characterized in that south bridge (4) adopts VT82C686A.

5. according to the network computer main board system of the Godson-1CPU of claim 1, it is characterized in that the steering logic that south bridge (4) is used for low speed peripherals comprises: keyboard, mouse, serial ports, parallel port, USB mouth and AC97 (6).

6. according to the network computer main board system of the Godson-1CPU of claim 1, it is characterized in that Basic Input or Output System (BIOS) (3) is incorporated in the main board system.

7. according to the network computer main board system of the Godson-1CPU of claim 1, it is characterized in that, adopt disk technology on the sheet, network computer system guiding speed is obviously accelerated.

8. according to the network computer main board system of the Godson-1CPU of claim 1 or 6, it is characterized in that, in the BIOS Basic Input or Output System (BIOS) emulation based on the video card simulated program of X86 architecture, the video card that this makes other manufacturer's exploitations based on the X86 system, can be before entering linux kernel, video card is lighted, on screen, shown the startup situation of BIOS Basic Input or Output System (BIOS).

9. according to the network computer main board system of the Godson-1CPU of claim 1, it is characterized in that, use higher level lanquage-C language to write the BIOS Basic Input or Output System (BIOS), increase the readability of code, be convenient to debug and the programmer between mutual interchange.

10. the repositioning method of the network computer main board system of a Godson-1CPU, step is as follows:

Start reset button,, produce reset signal, deliver to south bridge it is resetted through reset generation circuit;

Produce new reset signal from south bridge and deliver to north bridge, it is resetted;

Produce a reset signal after north bridge resets, deliver to Godson 1-CPU, it is resetted.