AHCI and IDE Legacy Mode

Overview

• PCI Configuration Registers
• Command and Control Block registers
• Legacy Workflow
• AHCI Generic Host Control
• AHCI Port Registers
• AHCI Workflow

PCI Configuration Registers

PCI Command Register

PCI Status Register

Address Map Register

Port Control and Status Register

Bus Master IDE Register Description

Bus Master IDE Command Register

Bus Master IDE Status Register

Bus Master IDE Descriptor Table Pointer Register 

PRD Format

Command and Control Block registers

Device Control Register

Command Block registers - Input

Output LBA Format

Command Block registers - Output

Mapping of Registers – (Write)

Mapping of Registers – (Read)

Legacy Workflow

AHCI Generic Host Control

AHCI Port Registers

Port Task File Data

Port Serial ATA Status

Port Serial ATA Control

AHCI Workflow

System Software Initialization

Device Reset Step

Port Reset

HBA Reset