Role of the Universe Asic, VMEbus Domain | Motorola MVME2300 Series

5

Programming Details

big-endian mode, there should be no endian issues for Ethernet data. Big- endian software, however, must still take the byte-swapping effect into account when accessing the registers of the PCI-Ethernet device.

PCI-Graphics

Big-endian software must take the effects of byte swapping on big-endian software into account.

Note On MVME2300 series boards this is not presently a consideration, as no graphics are implemented on these boards.

Role of the Universe ASIC

Since PCI is little-endian and the VMEbus is big-endian, the Universe VMEbus interface chip performs byte swapping in both directions (from PCI to VMEbus and from VMEbus to PCI) to maintain address invariance, regardless of the mode of operation in the processor’s domain.

VMEbus Domain

The VMEbus is inherently big-endian. All devices connected directly to the VMEbus are expected to operate in big-endian mode, regardless of the mode of operation in the processor’s domain.

In big-endian mode on the MVME2300 series boards, byte swapping is performed by the Universe and then by the Raven. The result has the desirable effect of being transparent to the big-endian software.

In little-endian mode, however, software must take the byte-swapping effect of the Universe ASIC and the address reverse-rearranging effect of the Raven into account.

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Motorola MVME2300 Series manual Role of the Universe Asic, VMEbus Domain, PCI-Graphics

Contents

Programmer’s Reference Guide MVME2300 Series VME Processor ModulePage Safety Summary Flammability Instructions CE Notice European Community Limited and Restricted Rights Legend Contents Raven PCI Bridge Asic Page Page Falcon ECC Memory Controller Chip Set Universe VMEbus to PCI Chip Chapter Page List of Figures Page List of Tables Xviii 32MB ECC Dram Model Memory Processor16MB ECC Dram 64MB ECC Dram Summary of Changes Date Description of Change Overview of Contents Comments and Suggestions Enter, Return or CR Conventions Used in This ManualBold Ctrl Xxiii Xxiv Introduction Overview Feature MVME2300 Summary of FeaturesFeatures MVME2300 Series ECC Dram System Block Diagram Scsa I/O Board Description and Memory Maps MVME2300 Series System Block Diagram Functional Description VMEbus InterfaceFront Panel Processor Memory Maps Programming ModelPCI interface P2 I/O Default Processor Memory Map Processor Address Size Definition Start End Processor Chrp Memory Map Chrp Memory Map Example Raven MPC Register Values for Chrp Memory Map Address Register Name Register Value Processor Prep Memory Map Prep Memory Map ExampleBfff Ffff PCI Configuration Access Raven MPC Register Values for Prep Memory Map PCI Chrp Memory Map Default PCI Memory MapPCI Memory Maps PCI Address Size Definition Start End FC03 Ffff Configuration Register Value Address Offset Register Name Raven PCI Register Values for Chrp Memory MapUniverse PCI Register Values for Chrp Memory Map PCI Prep Memory Map 10. PCI Prep Memory Map 39FF Ffff 38FF Ffff39FE Ffff 3AFE Ffff 11. Raven PCI Register Values for Prep Memory Map 12. Universe PCI Register Values for Prep Memory Map VMEbus Mapping VMEbus Master Map VMEbus Slave Map VMEbus Slave Mapping VSI0BD VSI0CTLVSI0BS VSI0TO 14. VMEbus Slave Map Example VMEbus Address Size Chrp Map Prep Map Range ModeFalcon-Controlled System Registers 15. System Register Summary $FD System Configuration Register SyscrSystem Configuration Register $FEF80400 Sysclk Value System Clock Speed PCI Clock Speed P0/1STAT Value Processor 0/1 Present External In-line Cache MSIZE01 Memory Configuration Register MemcrMemory Configuration Register $FEF80404 MSIZE01 Total Memory On Board MSPD01 RA/BTYP02L2TYPE03 System External Cache Control Register Sxccr L2PLL03FLSHP02 PLL Value Size CPU Control Register Processor 0 External Cache Control Register P0XCCRProcessor 1 External Cache Control Register P1XCCR CPU Control Register $FEF88300 W83C553 PIB Registers Access RegistersISA Local Resource Bus Uart NVRAM/RTC and Watchdog Timer Registers General-Purpose Readable Jumpers 18. Module Configuration and Status Registers Module Configuration and Status Registers17. M48T59/559 Access Registers PCI I/O Address Function Cputype CPU Configuration RegisterOld CPU Configuration Register $FE000800 SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0 Base Module Feature Register Base Module Feature Register Offset $0802Pcixp PMC2P PMC1P Vmep Lanp Base Module Status Register Offset $0803 Base Module Status Register BmsrBasetype Basetype Segment Display Register Offset $08C0 VME RegistersSeven-Segment Display Register SD9 SD8 SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0 SETSIG1 19. VME RegistersLM/SIG Control Register SETSIG0 LM/SIG Status Register Board Description and Memory Maps Location Monitor Upper Base Address Register Offset $1002 Location Monitor Upper Base Address RegisterLocation Monitor Lower Base Address Register Location Monitor Lower Base Address Register Offset $1003 SEM1 Semaphore RegisterSemaphore Register 1 Offset $1004 Semaphore Register 2 Offset $1005 VME Geographical Address Register Vgar Emulated Z8536 CIO Registers and Port Pins20. Emulated Z8536 Access Registers Emulated Z8536 Registers Z8536 CIO Port Pins Port Signal Direction Descriptions Pin Name21. Z8536 CIO Port Pin Assignments ISA DMA Channels PC2 BASETYP0PC3 BASETYP1 Page Features Features of the Raven AsicFunction Features Block Diagram Raven Block Diagram MPC Bus Interface MPC Address Mapping MPC-to-PCI Address Decoding MPC to PCI Address Translation MPC Slave Command Types MPC Slave Response MPC Transfer Type Transaction Encoding MPC Write Posting MPC Master PCI Command Code MPC Transfer TypesMPC Transfer Type MPC Transfer Size TT0-TT4 MPC Bus Timer MPC Arbiter Configuration Registers PCI Address Mapping MPC Bus Address Space PCI to MPC Address Decoding RavenMPIC Control Registers Decoder Priority PCI Slave Command Type Slave Response? Command TypesCommand Types PCI Slave Response Addressing Target-Initiated Termination Exclusive AccessDevice Selection Fast Back-to-Back Transactions PCI Write Posting ParityCache Support PCI Master Entity Addressed PCI Master Command CodesPCI Command Transfer Type Combining, Merging, and Collapsing Master Initiated Termination Arbitration Arbitration LatencyAddress/Data Stepping Generating PCI Cycles Generating PCI Memory and I/O CyclesPCI Cycle Type Generating PCI Configuration Cycles PCI Spread I/O Address Translation Functional Description Generating PCI Special Cycles Device Number Address Bit When MPC Devices are Big-Endian Endian ConversionGenerating PCI Interrupt Acknowledge Cycles Big- to Little-Endian Data Swap Address Modification for Little-Endian Transfers When MPC Devices are Little-EndianRaven Registers and Endian Mode Data Address Length Bytes Modification Error Handling SMA Error Status Error Address AttributesTransaction Ordering Perr Raven Registers MPC Registers Raven MPC Register Map Vendor ID/Device ID Registers VenidDevid Revid General Control-Status/Feature RegistersRevision ID Register Revision ID. Identifies the Raven revision level. This Marb FlbrdBhog Mpic MIDx FeatCurrent MPC Data Bus Master Operation Reset $00 $B4 Prescaler Adjust RegisterOperation Reset $00 MPC Arbiter Control Register MPC Error Enable Register Matom Matoi SmamRtam Perri MPC Error Status Register OVFMato PCI transaction. The bit may be cleared by writing it to a Writing it to a 0 has no effect. When the Smam bitSMA RTA Register MPC Error Attribute Register MeratWhich originated the transfer in which the error occurred TTx Designates a selected byte Piack Operation Reset $0000PCI Interrupt Acknowledge Register Address $FEFF0030 Bit Name END Operation Reset $8000 $8080Start MPC Slave Address 3 Register REN MPC Slave Offset/Attribute 0,1 and 2 RegistersMSOFFx WEN Wpen IOMMSOFF3 Cycles. When clear, the corresponding MPC slave will PCI Registers $18 $7F Raven PCI Configuration Register Map$0C $8C $CF8 Operation Reset $4801 $1057Raven PCI I/O Register Map Offset $00 Bit Name PCI Command/ Status Registers Sigta DparSeltim Rcvta Base Register Revision ID/ Class Code RegistersClass Space IO/MEM RESIoba PRE To access MPC bus resources. The value of this field will PCI Slave Address 0,1,2 and 3 RegistersBe compared with the upper 16 bits of the incoming PCI Transfer type code which specifies the current transaction PCI Slave Attribute/ Offset 0,1,2 and 3 RegistersINV GBL Configaddress Register Perspective from the MPC bus in Big-Endian modeConceptual perspective from the PCI bus FUN Perspective from the MPC bus in Little-Endian modeREG DEV EN Enable Configdata RegisterBUS Data ‘D’ Data ‘C’ Data ‘B’ Data ‘A’ Operation Reset Data ‘B’ Data ‘C’ Data ‘D’ Operation Reset Features Raven Interrupt ControllerArchitecture Readability of CSR Interrupt Source PriorityProcessor’s Current Task Priority Interprocessor Interrupts IPI Nesting of Interrupt EventsSpurious Vector Generation Compatibility Raven-Detected Errors Timers Interrupt Delivery Modes Block Diagram Description Raven Interrupt Controller Program-Visible Registers Interrupt Pending Register IPRInterrupt Selector is In-Service Register ISR Interrupt Request Register IRRInterrupt Router Raven PCI Bridge Asic 10. RavenMPIC Register Map Mpic RegistersRavenMPIC Registers Off $010E0 $010F0$011E0 $100E0 $100F0 $101E0 $101F0 Feature Reporting Register NcpuVID Global Configuration Register Offset $01020 Bit Name STP Processor 1. Writing a 1 to P1 will assert the Soft ResetVendor Identification Register Processor Init Register ACT IPI Vector/Priority RegistersMask Prior Vector fetch Spurious Vector RegisterInterrupt Acknowledge register is read during a spurious Offset $010E0 Bit Name Timer Current Count Registers Timer Base Count Registers Base Count. This field contains the 31-bit count for this Count Inhibit. Setting this bit to 1 inhibits counting forThis timer. Setting the bit to 0 allows counting to proceed Bit transitions from a 1 to a 0, the value is copied into Timer Destination Registers POL Setting this bit to a 0 enables active low or negative edgeExternal Source Vector/Priority Registers Sense External Source Destination Registers Raven-Detected Errors Vector/Priority Register Offset $10200 Bit Name Raven-Detected Errors Destination Register Offset $10210 Bit Name Offset Processor $20080 $21080 Bit Name End-of-Interrupt Registers Zero is assumed. Writing to this register signals the endInterrupt Acknowledge Registers End Of Interrupt. There is one EOI register per External Interrupt Service Programming Notes Reset State Dynamically Changing I/O Interrupt Configuration Interprocessor Interrupts Mode EOI RegisterInterrupt Acknowledge Register Current Task Priority Level Architectural Notes Page Features of the Falcon Chip Set Dram Block Diagrams Falcon Pair Used with Dram in a System Falcon Internal Data Paths Simplified Overall Dram Connections Bit Ordering Convention PerformanceFour-beat Reads/Writes Single-beat Reads/Writes Dram Speeds 2nd 3rd 4th PowerPC 60x Bus to Dram Access Timing 70ns Page DevicesClock Periods Required For Total Access Type Beat PowerPC 60x Bus to Dram Access Timing 60ns Page Devices 2nd 3rd 4th Clocks Beat PowerPC Bus to Dram Access Timing 50ns Hyper Devices ROM/Flash Speeds Completing Data Transfers PowerPC 60x Bus InterfaceResponding to Address Transfers Cache Coherency Cache Coherency Restrictions L2 Cache SupportCycle Types Error Reporting Single-Bit Error Logging Dram TesterROM/Flash Interface Functional Description $XXFFFFFA $7FFFFE $XXFFFFF8 $7FFFFC$XXFFFFF9 $7FFFFD $XXFFFFFB $7FFFFF $X3FFFFF2 $7FFFFE $X3FFFFF0 $7FFFFE$X3FFFFF1 $7FFFFE $X3FFFFF3 $7FFFFE Refresh/Scrub Blocks a and/or B Present, Blocks C and D Not Present Blocks a and/or B Present, Blocks C and/or D Present Chip Defaults Dram Arbitration CSR Accesses External Register SetCSR Architecture Data Path for Reads from the Falcon Internal CSRs Data Path for Writes to the Falcon Internal CSRs Memory Map for Byte Reads to CSR 1906 Memory Map for 4-Byte Reads to CSR Register Summary Detailed Register Bit Descriptions 10. Register Summary Programming Model Test D3 Lower 32 Bits Vendor/Device Register Address $FEF80000 Bit Name Revision ID/ General Control Register Read Zero Read only Ram spd0,ram spd1 11. ram spd1,ram spd0 and Dram TypeRam spd0, ram spd1 Dram Speed Dram Type Dram Attributes Register Ram a/b/c/d enRam a/b/c/d siz0-2 0MB BlockA/B/C/D ConfigurationsRam a/b/c/d Block Size Devices Used Technology Comments SIMM/DIMM CLK Frequency Register Dram Base RegisterRAM A/B/C/D Base CLK Frequency Rwcb ECC Control RegisterRefdis Read Zero 11707.00 Falcon ECC Memory Controller Chip Set Mien TienSien Mcken Elog Esen Embt Error Address Register Address $FEF80038 Bit Name Rtest0,rtest1,rtest2 Test Mode selected 13. rtest Encodings Refresh/Scrub Address Register Address $FEF80048 Bit Name ROM a Base 1Mbyte of Block a also appears at $FFF00000 Rom a siz Block Size 14. ROM Block a Size Encoding15. romarv and rombrv Encoding 1MB 16. Read/Write to ROM/Flash Cycle Transfer Alignment Romx64 Romxwe Falcon Response ROM B Base/Size Register ROM B Base1Mbyte of Block B also appears at $FFF00000 17. ROM Block B Size Encoding Rom b siz Block Size CTR32 is a 32-bit, free-running counter that increments Dram Tester Control RegistersBit Counter Has been programmed properly. Notice that CTR32 is Power-Up Reset Status Register Address $FEF80400 Bit NameAddress $FEF80500 Bit Name External Register Set Address $FEF88000 $FEF8FFF8 Bit Name Programming ROM/Flash Devices Parity Checking on the PowerPC BusSoftware Considerations Writing to the Control Registers Sizing Dram Software Considerations 1024MB 256MB 128MB 64MB 32MB 16MB 19. PowerPC 60x Address to Dram Address Mappings18. Sizing Addresses ROW 20. Syndrome Codes Ordered by Bit in Error ECC CodesBit Syndrome 20. Syndrome Codes Ordered by Bit in Error 21. Single-Bit Errors Ordered by Syndrome Code $AF $CF $EF 10. PowerPC Data to Dram Data Correspondence Data Paths 22. PowerPC Data to Dram Data Mapping Page Universe VMEbus to PCI Chip Features of the Universe Asic − BLT, ADOH, RMW, Lock Block Diagram Architectural Diagram for the Universe Universe as VMEbus Slave PCI Bus Interface Universe as VMEbus Master Interrupter Universe as PCI Slave Universe as PCI Master DMA Controller VMEbus Interrupt Handling Universe Control and Status Registers Ucsr Ucsr Access Mechanisms Universe Register Map Offset Register Name LSI2TO LSI2BSLSI2BD LSI3BS Dllue DcppDgcs Linten VSI2CTL F2C VSI0BD F0CVSI1BS F1C VSI2BS Universe Chip Problems after PCI Reset Description Workarounds Method Example 1 MVME2600 Series Board Exhibits PCI Reset Problem Examples Example 2 MVME3600 Series Board Acts Differently Run the init code and the LSI0 registers become Example 3 Universe Chip is Checked at Tundra Universe VMEbus to PCI Chip Pci Bus Request PCI Masters PCI ArbitrationPCI Arbitration Assignments PIB Interrupt Handling MVME2300 Series Interrupt Architecture Edge Polarity Interrupt Source RavenMPICRavenMPIC Interrupt Assignments Level Interrupts IRQ14IRQ15 PIB Interrupt Handler Block Diagram PIB PCI/ISA Interrupt Assignments Edge ISA DMA Channels Sources of Reset Reset switchExceptions Sources of Reset Soft ResetReset Sources and Devices Affected Devices Affected Error Notification and Handling Error Notification and HandlingCause Action Endian Issues Big-Endian Mode Little-Endian Mode PCI Domain Processor/Memory DomainRole of the Raven Asic PCI/Ethernet Role of the Universe Asic VMEbus DomainPCI-Graphics ROM/Flash Bank Default Default Mapping for FFF00000-FFFFFFFFROM/Flash Initialization Page Motorola Computer Group Documents Document Title Publication Number Manufacturers’ Documents Document Title and Source Publication Number MPCFPE/AD EK-DE500-OM Related Specifications ANSI/IEEEIEC 821 BUS MPR-PPC-RPU-02 IsbnTIA/EIA-232 Page Glossary O S S a R Y Enhanced Integrated Drive Electronics. An improved version PCI. Used in the reference platform specification. IBM Computers developed by the IBM Corporation. PowerPC is IBM Signal Computing System Architecture. a hardware model for See 10base-2 Page Index PCI 1-13 processor IN-3 MPC PCI IN-5 Configaddress 2-56CONFIGDATA IN-7 IN-8