GeodeLink Architecture3, AMD Geode, GX Processor

GeodeLink™ Architecture	32430C

GeodeLink™ Architecture3

GeodeLink™ architecture connects the internal modules of the AMD Geode™ GX processor using the data channels pro- vided by GeodeLink Interface Units (GLIUs). GeodeLink modules are connected to GLIU ports 1 – 7 as shown in Figure 3-

1.Port 0 is always the GLIU itself. GLIUs can be chained together and up to a maximum of six GLIUs can be connected allowing for 32 modules.

			GLMC
			GLMC
		1			CPU Core
		1			CPU Core
		0			3
					3
Not Used	7		GLIU0		4	DC







	6				5




	VP			2	GP


AMD Geode™		GLIU0		GLIU1							ACC




GX Processor

		1			Not Used				USBC1			5		DD
		1			Not Used				USBC1			5		DD
		0			2		6						4



Not Used	7		GLIU1		3	GLCP		GLCP			GLIU				ATAC




													3
	6				5		7			0			3
													2

Not Used

GLPCI

GIO

AMD Geode™

USBC2

CS5535

Companion

Device

GLPCI

PCI Bus

Figure 3-1. GeodeLink™ Architecture Topology

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

Page 13

Image 13

AMD manual GeodeLink Architecture3, AMD Geode, GX Processor, CS5535 Companion Device

Contents

Publication ID 32430C April Trademarks Advanced Micro Devices, Inc. All rights reserved Contents Contents GeodeLink Architecture Topology List of Figures List of Figures List of Tables List of Tables Introduction Overview1 Assumption Example MSR Transaction Model Specific Registers2Load MSR specified by ECX into Edxeax Write the value in Edxeax to MSR specified by ECX Model Specific Registers AMD Geode GeodeLink Architecture3GX Processor CS5535 Companion Device Descriptors GeodeLink MSR AddressingAddressing Example Memory Descriptor Types Processor Initialization Set Clocks and ResetSysref Mdiv Vdiv Memory Controller Initialization Calculating Processor SpeedCPU Identification GeodeLink Modules Initialization Test Extended DramSize Memory Default Region Configuration Properties Bit Descriptions Descriptor Allocation Glpci RegionsDescriptor MSR Address Chipset ID AMD Geode CS5535 Companion Device InitializationSet ID Select Idsel Gliu Initialization IRQ Mapper Multi Function General Purpose Timers MFGPTsKeyboard Emulation Logic KEL 1+ System Management Bus SMBus Acpi Power Management LogicFlash Interface Other Legacy DD Initialization ATA-5 / Hard Drive Initialization Diverse Device I/O LocationsUniversal Serial Bus USB 7 AC97 Audio Controller Initialization PCI Bus Initialization Virtual System Architecture InitializationGeodeLink Control Processor Initialization Allocate Processor Frame Buffer and VSA2 Memory Initialize Graphics Subsystem Miscellaneous InitializationsMonochrome Support Dual Monitor Support 32430C Clocking Implementation5Scratchpad Initialization Post Codes Implementation Setup Options6 32430C ROM Memory7MapVSA Frame Buffer Memory MappedVSA PCI GeodeROM Flow GX Processor/CS5535 Device VSA Table A-1. Revision History Document Revision HistoryRevision # Revisions / Comments Initial release