Accessing Memory Mapped Registers in CXL 2.0 Devices
CXL 1.1 and CXL 2.0 specification differ in the way memory mapped registers are placed and accessed. The CXL 1.1 specification places memory mapped registers in RCRB (Root Complex Register Block) while the CXL 2.0 specification links memory mapped registers in BAR (Base address ranges) of the device. In this blog we will focus on how to access CXL 2.0 specification memory mapped registers.
Register locator DVSEC (Designated Vendor Specific Extended Capability), available in the configuration space, acts as a link to access memory mapped registers. DVSEC contains register blocks which in-turn contain information of BAR allocated for memory mapped registers like component registers, memory device registers and BAR virtualization registers.
To read the full article, click here
Related Semiconductor IP
- CXL 2.0 Controller with AXI
- CXL 2.0 Controller
- CXL 2.0 Integrity and Data Encryption Security Module
- CXL 2.0 Dual Mode Controller
- CXL 2.0 Retimer
Related Blogs
- Technical Comparison - MPHY 3.0 vs MPHY 2.0
- PLDA and AnalogX Acquisitions Supercharge the Rambus CXL Memory Interconnect Initiative
- Accelerating the CXL Memory Interconnect Initiative
- Verification of Integrity and Data Encryption (IDE) for CXL Devices
Latest Blogs
- Tape-Out Readiness Checklist: Engineering Decisions That Prevent Costly Respins
- How Cadence DSPs Put In-Cabin AI Audio On-Chip in SemiDrive's X10
- The Fastest Path to Scalable Photonic Systems: Using Proven IP for both PIC and EIC designs
- Building Trusted AI Agents from the Silicon Root of Trust
- Heterogeneous Computing in Space