Lexra
™
O
LX8000 é um dos processdores da Lexra e está no coração
da NetVortex. O LX8000 é altamente aperfeiçoado para redes que
controla porque pode manuzear oito pacotes de dados de redes diferentes. Transferir
pacotes, como também remeter cálculo de endereço que
podem levar muitos ciclos, forçando CPUs RISC tradicionais a ficarem
ociosas, esperando a operação se completar. O resultado é
uma melhoria de desempenho de mais que 5x a tecnologia de RISC atual.
A
Lexra possue hoje NPus de altíssimo desempenho mas de custo elevado,
por isso deve-se antes efetuar um paralelo do custo/benefício desta
solução na corporação e analisar a real perspectiva
de permanência do produto no mercado, garantido pela empresa, usando
a filosofia dos processadores de uso genêrico sendo atualizados por
software conforme haja mudança de tecnologia.
Abaixo,
informações mantidas pelo desenvolvedor Lexra™
|
LX8000 High Speed Packet Processing 32-bit RISC NPU
Core
- Up To Eight Hardware
Contexts: Allow software controlled zero delay switching to another
thread of execution while the first thread waits for an external event
such as a table look-up operation, maximizing packet processing throughput
from minimal silicon area.
- Dual-Port Data Memory:
Allows a high bandwidth device to source and sink DMA data at
64 bits per cycle.
- Bit Field Manipulation
Instructions: Extend the MIPS® R3000® RISC ISA to enable efficient
classification of IP packet headers.
- Lexra Bus Extensions:
Increase the Lexra bus data width to 64 bits; facilitate the use
of multiple contexts and multiple processors; provide for bus segmentation
and bridging; allow transactions to release the bus while waiting
for the return of target data.
- Performance, Power,
and Size: Are unmatched in the industry. One core operating at
450 MHz consumes 0.425 watts in 4 mm2 of silicon (with 4 contexts
in a 0.15 mm process SmoothCore).
- EJTAG Debug: Extends
the EJTAG 2.0.0 specification to the multi-processor and multi-context
environment for in-circuit emulation. (optional)
- Development Tools:
Available from third party suppliers supporting the MIPS architecture,
including industry leaders Green Hills Software and Embedded Performance.
- Portability: Available
as a synthesizable RTL core or as a SmoothCore™, an optimized
hard macro that has been ported to a specific foundry process. Foundry
partners include IBM, TSMC, and UMC.
fonte Lexra™
MIPS, MIPS I, MIPS16, R3000, and any other MIPS common law marks are
trademarks and/or registered trademarks of MIPS Technologies Inc.
Lexra Inc. is not associated with MIPS Technologies Inc. in any way.
*Unaligned load and store instructions are not supported in hardware
and software.
Copyright© 2000 Lexra, Inc. SmoothCore is a trademark of Lexra, Inc.
All other trademarks are the property of their owners.
|