Motorola MVME2400 Series Manuel de service Page 118
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Hawk PCI Host Bridge & Multi-Processor Interrupt Controller
2
There is a possibility for a priority tie between the two processors when
resolving external interrupts. In that case, the interrupt will be delivered to
processor 0 or processor 1 as determined by the TIE mode bit. This case is
not defined in the above rule set.
Programming Notes
External Interrupt Service
The following summarizes how an external interrupt is serviced:
❏ An external interrupt occurs.
❏ The processor state is saved in the machine status save/restore
registers. A new value is loaded into the Machine State
Register(MSR). The External Interrupt Enable bit in the new MSR
(MSRee) is set to zero. Control is transferred to the O/S external
interrupt handler.
❏ The external interrupt handler calculates the address of the Interrupt
Acknowledge register for this processor (MPIC Base Address +
0x200A00 + (processor ID shifted left 12 bits).
❏ The external interrupt handler issues an Interrupt Acknowledge
request to read the interrupt vector from the Hawk’ MPIC. If the
interrupt vector indicates the interrupt source is the 8259, the
interrupt handler issues a second Interrupt Acknowledge request to
read the interrupt vector from the 8259. The Hawk’ MPIC does not
interact with the vector fetch from the 8259.
❏ The interrupt handler saves the processor state and other interrupt-
specific information in system memory and re-enables for external
interrupts (the MSRee bit is set to 1). MPIC blocks interrupts from
sources with equal or lower priority until an End-of-Interrupt is
received for that interrupt source. Interrupts from higher priority
interrupt sources continue to be enabled. If the interrupt source was
the 8259, the interrupt handler issues an EOI request to the MPIC.
This resets the In-Service bit for the 8259 within the MPIC and
allows it to recognize higher priority interrupt requests, if any, from
- MVME2400-Series 1
- VME Processor Module 1
- Programmer’s 1
- Reference Guide 1
- Restricted Rights Legend 2
- ©Copyright Motorola 1999 4
- All Rights Reserved 4
- March 1999 4
- Safety Summary 5
- Safety Depends On You 5
- Contents 7
- Glossary 14
- List of Figures 15
- List of Tables 17
- 1Board Description and 21
- Memory Maps 21
- Overview 23
- Feature Summary 23
- System Block Diagram 24
- 2067 9708 26
- Configuration 36
- PCI MEMORYPROCESSOR 42
- PCI Memory 44
- Processor 44
- ISA Space 44
- PCI I/O Space 44
- ISA Local Resource Bus 49
- VME Registers 51
- Introduction 59
- ❏ Interrupt Controller 60
- Block Diagram 61
- PPC Bus Interface 63
- ❏ HAWK (Highest Priority) 74
- ❏ CPUy (Lowest Priority) 74
- PCI Bus Interface 76
- ❏ Memory and I/O 87
- ❏ Configuration 87
- ❏ Special Cycle 87
- ❏ Interrupt Acknowledge 87
- PPC Address + Offset 88
- PCI Address 88
- 0 0 0 0 0 0 0 88
- Endian Conversion 95
- 1916 9610 96
- Error Handling 98
- Watchdog Timers 99
- PCI/PPC Contention Handling 102
- Functional Description 103
- Transaction Ordering 104
- PHB Hardware Configuration 106
- External Interrupt Interface 108
- Architecture 108
- CSR’s Readability 109
- Interrupt Source Priority 109
- Nesting of Interrupt Events 110
- Spurious Vector Generation 110
- 8259 Compatibility 111
- PHB Detected Errors 111
- Interrupt Delivery Modes 112
- Block Diagram Description 113
- Programming Notes 118
- Operation 120
- Architectural Notes 121
- Registers 123
- MBT Time Out Length 128
- 00 256 µsec 128
- 01 64 µsec 128
- 10 8 µsec 128
- 11 disabled 128
- PCI Registers 153
- $CFB $CFA $CF9 $CF8 162
- $CF8 $CF9 $CFA $CFB 162
- MPIC Registers 166
- Timer 0 - $01100 176
- Timer 0 - $01120 178
- Processor 0 $20080 184
- 3System Memory Controller 187
- Block Diagrams 188
- PowerPC 60x Bus 189
- SDRAMPowerPC 190
- Side Side 190
- PowerPC 60x Bus Interface 199
- ROM/Flash Interface 204
- I2C Interface 209
- Refresh/Scrub 221
- CSR Accesses 221
- External Register Set 221
- Chip Configuration 221
- Programming Model 222
- Table 3-9. Register Summary 223
- ERR_SYNDROME 236
- SBE_COUNT 236
- ERROR_ADDRESS 238
- I2_DATARD 252
- Software Considerations 262
- Possible Control Bit Values 266
- ECC Codes 274
- 4Universe II (VMEbus to PCI) 277
- Registers (UCSR) 283
- Universe II Register Map 284
- Register Name 285
- LSI0_TO 285
- LSI1_TO 286
- LSI2_TO 286
- LSI3_TO 286
- VSI0_TO 288
- VSI1_TO 288
- VSI2_TO 288
- VSI3_TO 288
- VCSR_TO 289
- 5Programming Details 291
- Interrupt Handling 292
- Hawk MPIC 293
- 8259 Interrupts 294
- ISA DMA Channels 297
- Exceptions 298
- Soft Reset 299
- Endian Issues 301
- Figure 5-3. Big-Endian Mode 302
- PCI Local Bus 302
- 60X System Bus 302
- Processor/Memory Domain 304
- MPIC’s Involvement 304
- PCI Domain 304
- Universe II’s Involvement 305
- VMEbus Domain 305
- ROM/Flash Initialization 306
- Ordering Related 307
- Documentation 307
- Manufacturers’ Documents 308
- Publication 309
- Document Title and Source 309
- Related Specifications 311
- MVME2400 VPD Reference 315
- Information 315
- Field Size 319
- VPD data packet 320
- Example VPD SROM 322
- Numerics 341
- 2-87, 2-89 348
- Programmer’s Reference Guide 353
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