Workarounds, Method | Motorola MVME2300 Series guide

Functional Description

The Configuration Space enables are not the only things enabled after a PCI reset. The LSI0 image may also not be disabled by a PCI reset, regardless of the enable bit’s power-up condition. If the image is active at the time the reset occurs, it will remain enabled through the reset. Additionally, the image does not remain in the same VME or PCI address range.

How many of the Power-Up (P/U) option bits actually get latched as the Universe manual indicates they should, is uncertain. In any case, the EN bit in the LSI0_CTL register is not latched; on MVME2300 series boards, its P/U state is disabled but is not honored.

Workarounds

The software cannot completely correct this problem, but can minimize the effects of it. Two possible solutions are presented:

Method 1

1.Modify the PCI probe code to disable each PCI device prior to writing its configuration space BS registers. This will prevent the Universe from being active on the PCI bus while it has a base address of 0.

2.Once the Universe has been assigned a valid PCI Base Address, enable register space access and disable the LSI0 slave image by clearing the EN bit of the LSI0_CTL register.

Method 2

Modify the port 92 reset code to disable the LSI0 image before propagating the reset. This will cause the LSI0 image to come up disabled.

MCG understands that both of these methods are awkward, because the PCI probe/reset code should not contain any device-specific patches. It should only need to follow the probing conventions of the PCI specification. However, the only other option appears to be avoidance of the LSI0 image altogether.

Tundra engineering describes the problem as follows:

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Motorola MVME2300 Series manual Workarounds, Method

Contents

MVME2300 Series VME Processor Module Programmer’s Reference GuidePage Safety Summary Instructions Flammability 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 64MB ECC Dram Model Memory Processor16MB ECC Dram 32MB ECC Dram Date Description of Change Summary of Changes Comments and Suggestions Overview of Contents Ctrl Conventions Used in This ManualBold Enter, Return or CR Xxiii Xxiv Overview Introduction ECC Dram Summary of FeaturesFeatures MVME2300 Series Feature MVME2300 Scsa I/O System Block Diagram Board Description and Memory Maps MVME2300 Series System Block Diagram Front Panel Functional DescriptionVMEbus Interface P2 I/O Programming ModelPCI interface Processor Memory Maps Processor Address Size Definition Start End Default Processor Memory Map Chrp Memory Map Example Processor Chrp Memory Map Address Register Name Register Value Raven MPC Register Values for Chrp Memory Map Bfff Ffff Processor Prep Memory MapPrep Memory Map Example Raven MPC Register Values for Prep Memory Map PCI Configuration Access PCI Address Size Definition Start End Default PCI Memory MapPCI Memory Maps PCI Chrp Memory Map FC03 Ffff Universe PCI Register Values for Chrp Memory Map Configuration Register Value Address Offset Register NameRaven PCI Register Values for Chrp Memory Map 10. PCI Prep Memory Map PCI Prep Memory Map 3AFE Ffff 38FF Ffff39FE Ffff 39FF Ffff 11. Raven PCI Register Values for Prep Memory Map 12. Universe PCI Register Values for Prep Memory Map VMEbus Master Map VMEbus Mapping VMEbus Slave Map VMEbus Slave Mapping VSI0TO VSI0CTLVSI0BS VSI0BD 15. System Register Summary VMEbus Address Size Chrp Map Prep Map Range ModeFalcon-Controlled System Registers 14. VMEbus Slave Map Example Sysclk Value System Clock Speed PCI Clock Speed System Configuration Register SyscrSystem Configuration Register $FEF80400 $FD P0/1STAT Value Processor 0/1 Present External In-line Cache MSIZE01 Total Memory On Board Memory Configuration Register MemcrMemory Configuration Register $FEF80404 MSIZE01 L2TYPE03 MSPD01RA/BTYP02 PLL Value Size L2PLL03FLSHP02 System External Cache Control Register Sxccr CPU Control Register $FEF88300 Processor 0 External Cache Control Register P0XCCRProcessor 1 External Cache Control Register P1XCCR CPU Control Register Uart Access RegistersISA Local Resource Bus W83C553 PIB Registers General-Purpose Readable Jumpers NVRAM/RTC and Watchdog Timer Registers PCI I/O Address Function Module Configuration and Status Registers17. M48T59/559 Access Registers 18. Module Configuration and Status Registers SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0 CPU Configuration RegisterOld CPU Configuration Register $FE000800 Cputype Pcixp PMC2P PMC1P Vmep Lanp Base Module Feature RegisterBase Module Feature Register Offset $0802 Basetype Base Module Status Register BmsrBasetype Base Module Status Register Offset $0803 SD9 SD8 SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0 VME RegistersSeven-Segment Display Register Segment Display Register Offset $08C0 SETSIG0 19. VME RegistersLM/SIG Control Register SETSIG1 LM/SIG Status Register Board Description and Memory Maps Location Monitor Lower Base Address Register Offset $1003 Location Monitor Upper Base Address RegisterLocation Monitor Lower Base Address Register Location Monitor Upper Base Address Register Offset $1002 Semaphore Register 2 Offset $1005 Semaphore RegisterSemaphore Register 1 Offset $1004 SEM1 Emulated Z8536 Registers Emulated Z8536 CIO Registers and Port Pins20. Emulated Z8536 Access Registers VME Geographical Address Register Vgar 21. Z8536 CIO Port Pin Assignments Z8536 CIO Port PinsPort Signal Direction Descriptions Pin Name PC3 BASETYP1 ISA DMA ChannelsPC2 BASETYP0 Page Function Features FeaturesFeatures of the Raven Asic Block Diagram Raven Block Diagram MPC Address Mapping MPC Bus Interface MPC-to-PCI Address Decoding MPC Slave MPC to PCI Address Translation MPC Transfer Type Transaction Encoding Command Types MPC Slave Response MPC Master MPC Write Posting MPC Transfer Type MPC Transfer Size TT0-TT4 PCI Command CodeMPC Transfer Types MPC Arbiter MPC Bus Timer PCI Address Mapping Configuration Registers PCI to MPC Address Decoding MPC Bus Address Space Decoder Priority RavenMPIC Control Registers PCI Slave Addressing Command TypesCommand Types PCI Slave Response Command Type Slave Response? Fast Back-to-Back Transactions Exclusive AccessDevice Selection Target-Initiated Termination PCI Master ParityCache Support PCI Write Posting Transfer Type PCI Master Command CodesPCI Command Entity Addressed Master Initiated Termination Combining, Merging, and Collapsing Address/Data Stepping ArbitrationArbitration Latency PCI Cycle Type Generating PCI CyclesGenerating PCI Memory and I/O Cycles PCI Spread I/O Address Translation Generating PCI Configuration Cycles Functional Description Device Number Address Bit Generating PCI Special Cycles Generating PCI Interrupt Acknowledge Cycles When MPC Devices are Big-EndianEndian Conversion Big- to Little-Endian Data Swap Data Address Length Bytes Modification When MPC Devices are Little-EndianRaven Registers and Endian Mode Address Modification for Little-Endian Transfers Error Handling Perr Error Status Error Address AttributesTransaction Ordering SMA MPC Registers Raven Registers Raven MPC Register Map Devid Vendor ID/Device ID RegistersVenid Revision ID. Identifies the Raven revision level. This General Control-Status/Feature RegistersRevision ID Register Revid Mpic FlbrdBhog Marb Current MPC Data Bus Master MIDxFeat MPC Arbiter Control Register Prescaler Adjust RegisterOperation Reset $00 Operation Reset $00 $B4 Matom MPC Error Enable Register Perri SmamRtam Matoi Mato MPC Error Status RegisterOVF RTA Writing it to a 0 has no effect. When the Smam bitSMA PCI transaction. The bit may be cleared by writing it to a TTx MPC Error Attribute Register MeratWhich originated the transfer in which the error occurred Register Designates a selected byte Address $FEFF0030 Bit Name Operation Reset $0000PCI Interrupt Acknowledge Register Piack MPC Slave Address 3 Register Operation Reset $8000 $8080Start END WEN MPC Slave Offset/Attribute 0,1 and 2 RegistersMSOFFx REN MSOFF3 WpenIOM PCI Registers Cycles. When clear, the corresponding MPC slave will $8C Raven PCI Configuration Register Map$0C $18 $7F Offset $00 Bit Name Operation Reset $4801 $1057Raven PCI I/O Register Map $CF8 PCI Command/ Status Registers Rcvta DparSeltim Sigta Space Revision ID/ Class Code RegistersClass Base Register PRE RESIoba IO/MEM Be compared with the upper 16 bits of the incoming PCI To access MPC bus resources. The value of this field willPCI Slave Address 0,1,2 and 3 Registers GBL PCI Slave Attribute/ Offset 0,1,2 and 3 RegistersINV Transfer type code which specifies the current transaction Conceptual perspective from the PCI bus Configaddress RegisterPerspective from the MPC bus in Big-Endian mode DEV Perspective from the MPC bus in Little-Endian modeREG FUN BUS EN EnableConfigdata Register Data ‘B’ Data ‘C’ Data ‘D’ Operation Reset Data ‘D’ Data ‘C’ Data ‘B’ Data ‘A’ Operation Reset Architecture FeaturesRaven Interrupt Controller Processor’s Current Task Priority Readability of CSRInterrupt Source Priority Compatibility Nesting of Interrupt EventsSpurious Vector Generation Interprocessor Interrupts IPI Timers Raven-Detected Errors Interrupt Delivery Modes Raven Interrupt Controller Block Diagram Description Interrupt Selector is Program-Visible RegistersInterrupt Pending Register IPR Interrupt Router In-Service Register ISRInterrupt Request Register IRR Raven PCI Bridge Asic Off Mpic RegistersRavenMPIC Registers 10. RavenMPIC Register Map $011E0 $010E0$010F0 $100F0 $100E0 $101F0 $101E0 VID Feature Reporting RegisterNcpu Offset $01020 Bit Name Global Configuration Register Processor Init Register Processor 1. Writing a 1 to P1 will assert the Soft ResetVendor Identification Register STP Prior IPI Vector/Priority RegistersMask ACT Offset $010E0 Bit Name Spurious Vector RegisterInterrupt Acknowledge register is read during a spurious Vector fetch Timer Base Count Registers Timer Current Count Registers Bit transitions from a 1 to a 0, the value is copied into Count Inhibit. Setting this bit to 1 inhibits counting forThis timer. Setting the bit to 0 allows counting to proceed Base Count. This field contains the 31-bit count for this Timer Destination Registers Sense Setting this bit to a 0 enables active low or negative edgeExternal Source Vector/Priority Registers POL External Source Destination Registers Offset $10200 Bit Name Raven-Detected Errors Vector/Priority Register Offset $10210 Bit Name Raven-Detected Errors Destination Register Offset Processor $20080 $21080 Bit Name End Of Interrupt. There is one EOI register per Zero is assumed. Writing to this register signals the endInterrupt Acknowledge Registers End-of-Interrupt Registers Programming Notes External Interrupt Service Reset State Interprocessor Interrupts Dynamically Changing I/O Interrupt Configuration Current Task Priority Level EOI RegisterInterrupt Acknowledge Register Mode Architectural Notes Page Dram Features of the Falcon Chip Set Falcon Pair Used with Dram in a System Block Diagrams Falcon Internal Data Paths Simplified Overall Dram Connections Four-beat Reads/Writes Bit Ordering ConventionPerformance Dram Speeds Single-beat Reads/Writes Beat PowerPC 60x Bus to Dram Access Timing 70ns Page DevicesClock Periods Required For Total Access Type 2nd 3rd 4th 2nd 3rd 4th Clocks Beat PowerPC 60x Bus to Dram Access Timing 60ns Page Devices PowerPC Bus to Dram Access Timing 50ns Hyper Devices ROM/Flash Speeds Cache Coherency PowerPC 60x Bus InterfaceResponding to Address Transfers Completing Data Transfers Cycle Types Cache Coherency RestrictionsL2 Cache Support Single-Bit Error Reporting ROM/Flash Interface Error LoggingDram Tester Functional Description $XXFFFFFB $7FFFFF $XXFFFFF8 $7FFFFC$XXFFFFF9 $7FFFFD $XXFFFFFA $7FFFFE $X3FFFFF3 $7FFFFE $X3FFFFF0 $7FFFFE$X3FFFFF1 $7FFFFE $X3FFFFF2 $7FFFFE Blocks a and/or B Present, Blocks C and D Not Present Refresh/Scrub Blocks a and/or B Present, Blocks C and/or D Present Dram Arbitration Chip Defaults CSR Architecture CSR AccessesExternal Register Set 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 Detailed Register Bit Descriptions Register Summary 10. Register Summary Test D3 Lower 32 Bits Programming Model Address $FEF80000 Bit Name Vendor/Device Register Read Zero Read only Revision ID/ General Control Register Ram spd0, ram spd1 Dram Speed Dram Type Ram spd0,ram spd111. ram spd1,ram spd0 and Dram Type Ram a/b/c/d siz0-2 Dram Attributes RegisterRam a/b/c/d en SIMM/DIMM BlockA/B/C/D ConfigurationsRam a/b/c/d Block Size Devices Used Technology Comments 0MB CLK Frequency Dram Base RegisterRAM A/B/C/D Base CLK Frequency Register Read Zero ECC Control RegisterRefdis Rwcb 11707.00 Falcon ECC Memory Controller Chip Set Mcken TienSien Mien Elog Embt Esen Address $FEF80038 Bit Name Error Address Register 13. rtest Encodings Rtest0,rtest1,rtest2 Test Mode selected Address $FEF80048 Bit Name Refresh/Scrub Address Register 1Mbyte of Block a also appears at $FFF00000 ROM a Base 1MB 14. ROM Block a Size Encoding15. romarv and rombrv Encoding Rom a siz Block Size Cycle Transfer Alignment Romx64 Romxwe Falcon Response 16. Read/Write to ROM/Flash 1Mbyte of Block B also appears at $FFF00000 ROM B Base/Size RegisterROM B Base Rom b siz Block Size 17. ROM Block B Size Encoding Has been programmed properly. Notice that CTR32 is Dram Tester Control RegistersBit Counter CTR32 is a 32-bit, free-running counter that increments Address $FEF80500 Bit Name Power-Up Reset Status RegisterAddress $FEF80400 Bit Name Address $FEF88000 $FEF8FFF8 Bit Name External Register Set Writing to the Control Registers Parity Checking on the PowerPC BusSoftware Considerations Programming ROM/Flash Devices Sizing Dram Software Considerations ROW 19. PowerPC 60x Address to Dram Address Mappings18. Sizing Addresses 1024MB 256MB 128MB 64MB 32MB 16MB Bit Syndrome 20. Syndrome Codes Ordered by Bit in ErrorECC Codes 20. Syndrome Codes Ordered by Bit in Error $AF $CF $EF 21. Single-Bit Errors Ordered by Syndrome Code Data Paths 10. PowerPC Data to Dram Data Correspondence 22. PowerPC Data to Dram Data Mapping Page Universe VMEbus to PCI Chip − BLT, ADOH, RMW, Lock Features of the Universe Asic Block Diagram Universe as VMEbus Slave Architectural Diagram for the Universe Universe as VMEbus Master PCI Bus Interface Universe as PCI Slave Universe as PCI Master Interrupter VMEbus Interrupt Handling DMA Controller Universe Control and Status Registers Ucsr Ucsr Access Mechanisms Universe Register Map Offset Register Name LSI3BS LSI2BSLSI2BD LSI2TO Linten DcppDgcs Dllue VSI2BS VSI0BD F0CVSI1BS F1C VSI2CTL F2C Description Universe Chip Problems after PCI Reset Method Workarounds Examples Example 1 MVME2600 Series Board Exhibits PCI Reset Problem 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 PIB PCI ArbitrationPCI Arbitration Assignments Pci Bus Request PCI Masters MVME2300 Series Interrupt Architecture Interrupt Handling Level RavenMPICRavenMPIC Interrupt Assignments Edge Polarity Interrupt Source IRQ15 InterruptsIRQ14 PIB Interrupt Handler Block Diagram Edge PIB PCI/ISA Interrupt Assignments ISA DMA Channels Exceptions Sources of ResetReset switch Devices Affected Soft ResetReset Sources and Devices Affected Sources of Reset Cause Action Error Notification and HandlingError Notification and Handling Big-Endian Mode Endian Issues Little-Endian Mode PCI/Ethernet Processor/Memory DomainRole of the Raven Asic PCI Domain PCI-Graphics Role of the Universe AsicVMEbus Domain ROM/Flash Initialization ROM/Flash Bank DefaultDefault Mapping for FFF00000-FFFFFFFF Page Document Title Publication Number Motorola Computer Group Documents Document Title and Source Publication Number Manufacturers’ Documents EK-DE500-OM MPCFPE/AD IEC 821 BUS Related SpecificationsANSI/IEEE TIA/EIA-232 MPR-PPC-RPU-02Isbn Page Glossary O S S a R Y Enhanced Integrated Drive Electronics. An improved version PCI. Used in the reference platform specification. IBM IBM Computers developed by the IBM Corporation. PowerPC is Signal Computing System Architecture. a hardware model for See 10base-2 Page Index PCI 1-13 processor IN-3 PCI MPC IN-5 Configaddress 2-56CONFIGDATA IN-7 IN-8