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

Memory Map

32430C

Figure 7-4 "GeodeROM Flow - GX Processor/CS5535 Device" (Continued)

Finish Post

Setup Stack

Shadow ROM

Initialize and

Enable Cache

Northbridge

Initialization and

CPU Bug Fixes

Chipset

Initialization

SuperI/O

Initialization

CS5535 descriptor

set here,

after shadow.

Enable

Interrupts

VSA

Initialization

System ROM

Initialization

PCI and Video

Option ROM

Initialization

Keyboard

F1 Pressed?

Y

Setup

Reset Reboot

Flag

Reset

Reset Reboot

Flag

INT 19

N

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Содержание CS5535

Страница 1: ...AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide April 2006 Publication ID 32430C...

Страница 2: ...plied warranty of mer chantability fitness for a particular purpose or infringement of any intellectual property right AMD s products are not designed intended authorized or warranted for use as compo...

Страница 3: ...deLink Architecture 13 3 1 GeodeLink MSR Addressing 14 3 2 Descriptors 14 4 0 Initialization 15 4 1 Processor Initialization 15 4 2 AMD Geode CS5535 Companion Device Initialization 20 4 3 Virtual Syst...

Страница 4: ...4 AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide Contents 32430C...

Страница 5: ...ures 32430C List of Figures Figure 3 1 GeodeLink Architecture Topology 13 Figure 4 1 Clock Control 15 Figure 7 1 GLIU Descriptor Map 31 Figure 7 2 CPU Core Cache Descriptors 31 Figure 7 3 CPU Core Cac...

Страница 6: ...6 AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide List of Figures 32430C...

Страница 7: ...GX Processor CS5535 Companion Device GeodeROM Porting Guide 7 List of Tables 32430C List of Tables Table 4 1 Default Region Configuration Properties Bit Descriptions 18 Table 4 2 Diverse Device I O Lo...

Страница 8: ...8 AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide List of Tables 32430C...

Страница 9: ...5535 device system Where appro priate the changes list the Entry Conditions that briefly describe the machine state required to execute that function as well as some pseudo code for implementing the c...

Страница 10: ...10 AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide Assumption 32430C...

Страница 11: ...modules on the GeodeLink interface the address of that module must be known Addresses are obtained by either scanning the GeodeLink interface or having prior knowledge of the chip topology This is di...

Страница 12: ...12 AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide Model Specific Registers 32430C...

Страница 13: ...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...

Страница 14: ...mplemented MSR accesses not in periph eral modules go to the bit bucket 3 1 1 Addressing Example GX Processor GeodeLink Modules Addresses Source CPU Core Destination GeodeLink Control Processor GLCP 2...

Страница 15: ...are controlled by three divisors as shown in Figure 4 1 The Feed back Divisor FbDIV in the PLL sets sppl_raw_clk Sppl_raw_clk is divided by the GeodeLink Divisor MDIV and the CPU Divisor VDIV to deri...

Страница 16: ...ation The CPUID check should be done as soon as possible Use the CPUID instruction Check the Major and Minor Revision fields located in the GLCP_CHIP_REVID register MSR Address 4C000017h 7 0 for the s...

Страница 17: ...e Load RDSYNC counter with sync value Note See the AMD Geode GX Processors Data Book publication ID 31505 for bit descriptions and allocation 4 1 4 Test Extended DRAM Entry Conditions 4 GB descriptor...

Страница 18: ...through register CR0 and both caches can be disabled through MSRs regardless of the CR0 state 4 1 5 4 Region Configuration Region Configuration MSRs are used to describe the caching properties of eac...

Страница 19: ...region MRSs are assigned Memory Region 0 Configu ration R0 through Memory Region 5 Configuration R5 Descriptor Allocation Register PHY_CAP MSR Address GLIU0 10000086h GLIU1 40000086h Each GLIU descrip...

Страница 20: ...ister GX GLPCI MSR Address 50000201Eh must match the device number to route MSR transactions across the PCI bus Example set IDSEL mov eax 02000000h IDSEL AD25 device 15 mov eax 04000000h IDSEL AD30 de...

Страница 21: ...rest 16 64 are hooked to ASMI Location NA Description Used for A20 support as well as USB keyboard emulation Initialization VSA technology Location 6000h Description SMBus is an industry standard two...

Страница 22: ...for 4 Flash devices Description NA Initialization The default values for the LBARs are located in BDCFG INC in the platform directory but can be changed at Boot via setup The Flash interface is config...

Страница 23: ...ry 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 7 AC97 Audio Controller...

Страница 24: ...m 4 to 16 MB To inhibit operating system DRAM detection code from reporting the frame buffer as part of system memory a GLIU offset descriptor is set to send transactions to the PCI bus and program Re...

Страница 25: ...RAM functional Interrupts enabled DMA initialized PCI bus functional Procedure 4 5 1 1 Monochrome Support GeodeROM includes the appropriate INT 10h support for monochrome video adapters SoftVG needs a...

Страница 26: ...26 AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide Initialization 32430C...

Страница 27: ...k clock used for the memory clock The Dot clock is used for video display control The Core and GeodeLink clocks can be programmed and restarted by reseting the GX processor 5 1 2 Scratchpad Initializa...

Страница 28: ...28 AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide Implementation 32430C...

Страница 29: ...tup Options Clock configuration complete control of system PLLs Default Use strap setting for core GeodeLink interface frequency is calculated based on DIMM type PM settings Default Off Audio enable d...

Страница 30: ...30 AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide 32430C...

Страница 31: ...Mask Offset RO Range Offset No Swiss Cheese Offset ROM Subtractive to PCI Subtractive to PCI Subtractive to PCI Memory Mapped VSA Subtractive to PCI Memory Mapped Frame Buffer Memory Mapped Video Reg...

Страница 32: ...sters PCI Frame Buffer VSA Extended Memory System and Option ROMs Conventional Memory RCONF_DEFAULT ROMRC RCONF_DEFAULT ROMBASE RCONF_DEFAULT DEVRG RCONF_SMM RCONF_DEFAULT SYSTOP RCONF_DEFAULT SYSRC R...

Страница 33: ...mper Settings or CMOS CPU Speed to get PCI Clock DRAM Clock Setting from SPD Set All Clocks GLCP_SYS_RSTPPL MSR Addr 4C00014h Set PLL Flag Internal PLL Reset Halt Uses CPU ID instruction Load CMOS NVR...

Страница 34: ...Setup Stack Shadow ROM Initialize and Enable Cache Northbridge Initialization and CPU Bug Fixes Chipset Initialization SuperI O Initialization CS5535 descriptor set here after shadow Enable Interrupts...

Страница 35: ...recorded in the table s below Table A 1 Revision History Revision PDF Date Revisions Comments A 30 Jun 2005 Initial release B 22 Mar 2006 The goal was to remove Confidential to make this an non NDA do...

Страница 36: ...One AMD Place P O Box 3453 Sunnyvale CA 94088 3453 USA Tel 408 749 4000 or 800 538 8450 TWX 910 339 9280 TELEX 34 6306 www amd com...

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