OpromUpdateDxeCLX64L

Index: 0054 | Size: 4192 bytes | Arch: x64 | Phase: DXE

Overview

Option ROM Update Policy driver for the Cascade Lake (CLX64L) platform. Configures PCIe slot number mapping and bus scan limits. Provides 8 PCIe slot mapping entries (root port to logical slot) and 6 bus scan limit entries for specific devices (Intel I350, X550, Mellanox).

Key Functions

• UefiMain — Entry point; caches UEFI globals, locates UBA protocol, registers OpROM config data with slot map and bus scan limits
• SetPcieSlotNumber / GetPcieSlotNumber — Maps PCIe Root Port (bus/device/function) to logical slot number using bitmask position
• GetBusScanLimit / GetBusScanLimit2 — Returns bus scan depth limits for specific NIC devices (I350 bus 4, X550 bus 8, Mellanox bus 8)
• GetUbaProtocol — Locates the UBA OpROM update protocol via BootServices
• GetHobList — Scans system configuration table for the HOB list pointer

Protocols / Dependencies

• UBA OpROM update protocol
• PCI Root Bridge I/O protocol
• ACPI Support protocol
• UBA Debug protocol

Platform

CLX64L (Cascade Lake Xeon 64L / Purley platform variant)