AMD CS5535 manual Diverse Device I/O Locations, ATA-5 / Hard Drive Initialization

Initialization	32430C
4.2.4.10 DD I/O Locations

	Table 4-2. Diverse Device I/O Locations
Location	Device
0020h	PIC Master Command and Status
0021h	PIC Master Command and Status
0060h	USB - Keyboard and Mouse Data
0064h	USB - Keyboard and Mouse Command and Status (KEL)
0070h	RTC Address
0071h	RTC Data
00A0h	PIC Slave Command and Status
00A1h	PIC Slave Command and Status
02E8h	UART/IR COM4
02F8h	UART/IR COM2
03E8h	UART/IR COM3
03F8h	UART/IR COM1
04D0h	PCI Level/Edge IRQ0-7
04D1h	PCI Level/Edge IRQ8-15
6000h	SMBus
6100h	GPIO and ICF
6200h	General Purpose Timers
6400h	Flash BAR
6500h	Flash BAR
6600h	Flash BAR
6700h	Flash BAR
9C00h	ACPI - Subdivide to support GX processor and CS5535 companion device
9D00h	Power Management Logic - Placed at the end of ACPI

4.2.5ATA-5 / Hard Drive Initialization

Hard drive initialization is handled by a system ROM that is loaded by GeodeROM. The hard drive ROM contains the hard drive initialization, the PIO modes support, and the interrupt support.

New to the hard drive ROM is the UDMA setup, so that default drivers may be used in some operating systems. The UDMA setup includes detecting the 80-conductor IDE cable for UDMA/66 support.

4.2.6Universal Serial Bus (USB)

There are two Universal Serial Bus Controllers (USBCs) each containing a GeodeLink™ Adapter, PCI Adapter, and USB Core blocks. The GeodeLink Adapter (GLA) translates GeodeLink transactions to/from Local bus transactions. The GLA interfaces to a 64-bit GLIU (GeodeLink Interface Unit) and a 32-bit Local bus. The GLA supports in-bound memory and I/O requests, which are converted by the PCI Adapter (PA) into PCI memory and I/O requests that target the USBC. It also sup- ports in-bound MSR transactions to the MSRs.

4.2.7AC97 Audio Controller Initialization

The audio codec is initialized by the native audio driver. The virtual PCI header contains the IRQ line. The IRQ is set through the regular PCI initialization and IRQ mapping.

AMD Geode™ GX Processor/CS5535 Companion Device GeodeROM Porting Guide 23