# SmmPciRbIo

| Field | Value |
|---|---|
| Index | 0199 |
| Size | 13,188 bytes (12.9 KB) |
| Phase | SMM (System Management Mode) |
| PE format | PE32+ x86-64, 5 sections |
| Source | `AmiModulePkg/PCI/SmmPciRbIo/SmmPciRbIo.c` |

## Overview

SMM PCI Root Bridge I/O access driver. The recovered code provides a PCI
configuration-space abstraction that can run from SMM, including legacy
CF8/CFC access, PCIe enhanced configuration, bus translation, and teardown
paths for runtime and S3 resume.

## Key Functions

- `ModuleEntryPoint` - SMM entry; library init and PCI RbIo setup
- `sub_544` - AutoGen library constructor
- `sub_1148` - core PCI Root Bridge I/O initialization
- `sub_1530` - library destructor
- `sub_340` - manual unload handler
- `sub_1664` - failure-path handler
- `sub_2A0` - early PCI configuration-space enumeration

## Protocols

- `SmmBase2`
- `SmmPciRbIo`
- `SmmCpuIo2`

## Platform

HR650X BIOS SMM infrastructure, `AmiModulePkg/PCI/SmmPciRbIo`