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The Rambus PCI Express (PCIe) 5.0 and Compute Express Link (CXL) PHY is a low-power, area-optimized, silicon IP core designed with a system-oriented approach . ....
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PCI Express 4.0/3.0/2.1/1.1 Support The Northwest Logic Expresso 4.0 Core is part of Rambus’ PCI Express Solution. This solution is designed to achieve maximum PCI Express throughput while being easy to use. The Expresso 4.0 Core separately, or in combination with Northwest Logic family of DMA Cores and DMA Drivers, provide the maximum system throughput on a PCI Express link. Contact Rambus for more details. The core is specifically designed for ease of use including full receive packet decoding, complete error handling, automatic handling of PCI Express message packets and comprehensive system-debug and link monitoring support. The core is delivered fully integrated and verified with the user’s Target PHY. Contact Rambus for a complete list of supported PHYs. To accelerate simulations, the core is also delivered integrated with a fast-simulating behavioral PHY. ....
High-performance PCIe-AXI Bridge and/or scatter-gather DMA The Northwest Logic Expresso DMA Bridge Core from Rambus provides high-performance DMA and/or bridging between PCI Express and AXI for both Endpoint and Root Port applications. Key features include: DMA operation hard cores • Supports memory-mapped/streaming (FIFO) DMA operation • Can be configured with multiple DMA Channels which are independently controlled by software • Supports legacy, MSI, MSI-X and local AXI interrupts Using the core eliminates the need for the user to implement their own DMA and/or bridging design thus significantly reducing development time and risk. Linux Expresso DMA Drivers. The Expresso DMA Driver works ....
Windows & Linux Drivers for the Expresso DMA Core The Northwest Logic Expresso DMA Driver from Rambus is specifically designed to be used with the Expresso DMA Core. It supports all DMA modes supported by the Expresso DMA Core. Together the driver and core provide a complete, pre-packaged, flexible DMA system. The Expresso DMA Driver includes support for: • Device registers and memory reads and writes • DMA read and write transfers • Low-level performance statistics • Legacy, MSI, MSI-X interrupts The Expresso DMA Driver creates and manages descriptor chains in system memory. The Expresso DMA Core then fetches and executes these descriptor chains. This approach enables the descriptor chain size to be maximized while minimizing the need for large descriptor memories in the Expresso DMA Core. ....