Difference between revisions of "NALLATECH"
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- Make LEON3 boot from System main memory. That includes to connect the system bus directly to the FSB and write a bootloader. | - Make LEON3 boot from System main memory. That includes to connect the system bus directly to the FSB and write a bootloader. | ||
| − | The measured speed is around 500.000 ACP_Memcopy() operations per second. | + | The measured speed is around 64-bytes 500.000 ACP_Memcopy() operations per second. |
| + | Since the LEON works at 100Mhz (100millions cycles per second) that not enough to support system bus. | ||
- Setup on-board DDR-II memory | - Setup on-board DDR-II memory | ||
Revision as of 17:15, 26 October 2009
http://www.nallatech.com/index.php/Intel-Xeon-FSB-Socket-Fillers/fsb-compute-module.html
Project Goals
- Implement a setup a LEON3 processor running Linux on the Nallatech board
- Set up Hasim environment
Project Status
- LEON3 is booting from Onchip RAM, and sending data through the FSB.
- Hasim is installed, waiting for the Bluespec license
Next steps
- Make LEON3 boot from System main memory. That includes to connect the system bus directly to the FSB and write a bootloader.
The measured speed is around 64-bytes 500.000 ACP_Memcopy() operations per second. Since the LEON works at 100Mhz (100millions cycles per second) that not enough to support system bus.
- Setup on-board DDR-II memory
Hints to work with Nallatech System
- The only way to communicate with the system right now is through the AFU interface, using the ACP_Memcopy() function.
- Never use less than 64bytes to send and 64bytes to receive or the system will hang up.!!! - In the FPGA design you should always send back the number of bytes you declare in the ACP_Memcopy(), if not the system will hang. - The data is received and send to the FPGA in packets of 256 bits => 32 bytes. That means that each time you make a ACP_Memcopy() you will receive two packets (two rx_valid) and you must send two packets back, (two tx_valid).
