April 17, 2026 Category: Security & Firmware
For security-critical applications, combine register-based disable with hardware-level isolation and bus firewalls. For low-power modes, consider clock gating after confirming that no bus deadlock can occur. how to disable dma on pld
While DMA is a critical feature for high-speed data transfer, unmanaged or unintended DMA channels can pose severe security risks, allowing malicious actors to bypass the operating system to read or corrupt system memory. Whether you are hardening a commercial design against physical attacks or debugging a timing violation in a custom SoC, knowing how to disable DMA on a PLD is a critical skill for the modern hardware engineer. April 17, 2026 Category: Security & Firmware For
if (pcie_tlp_address < RAM_BASE or pcie_tlp_address > RAM_END) then accept_TLP(); // Allow config space access else reject_TLP_with_UR(); // Unsupported Request error end if; Whether you are hardening a commercial design against
Some PLDs have dedicated DMA request/grant pins. Pulling these inactive or asserting a global disable input can stop all DMA activity.