MIPS R10000 Microprocessor User's Manual - SGI TechPubs Library

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viii Table of Contents 1 Introduction to the R10000 Processor MIPS Instruction Set Architecture (ISA) .....................................................................................2 What is a Superscalar Processor?.................................................................................................3 Pipeline and Superpipeline Architecture..........................................................................3 Superscalar Architecture .....................................................................................................3 What is an R10000 Microprocessor? ............................................................................................4 R10000 Superscalar Pipeline ...............................................................................................5 Instruction Queues...............................................................................................................6 Execution Pipelines ..............................................................................................................6 64-bit Integer ALU Pipeline......................................................................................6 Load/Store Pipeline...................................................................................................7 64-bit Floating-Point Pipeline...................................................................................7 Functional Units ...................................................................................................................9 Primary Instruction Cache (I-cache)..................................................................................9 Primary Data Cache (D-cache) ...........................................................................................9 Instruction Decode And Rename Unit..............................................................................10 Branch Unit ...........................................................................................................................10 External Interfaces................................................................................................................10 Instruction Queues.........................................................................................................................11 Integer Queue .......................................................................................................................11 Floating-Point Queue...........................................................................................................11 Address Queue .....................................................................................................................12 Program Order and Dependencies ..............................................................................................13 Instruction Dependencies....................................................................................................13 Execution Order and Stalling .............................................................................................13 Branch Prediction and Speculative Execution .................................................................14 Resolving Operand Dependencies.....................................................................................14 Resolving Exception Dependencies...................................................................................15 Strong Ordering....................................................................................................................15 An Example of Strong Ordering ..............................................................................16 R10000 Pipelines .............................................................................................................................17 Stage 1 ....................................................................................................................................17 Stage 2 ....................................................................................................................................17 Stage 3 ....................................................................................................................................18 Stages 4-6 ...............................................................................................................................18 Floating-Point Multiplier (3-stage Pipeline)...........................................................18 Floating-Point Divide and Square-Root Units .......................................................18 Floating-Point Adder (3-stage Pipeline) .................................................................18 Integer ALU1 (1-stage Pipeline)...............................................................................18 Integer ALU2 (1-stage Pipeline)...............................................................................18 Address Calculation and Translation in the TLB ..................................................19 Implications of R10000 Microarchitecture on Software............................................................20 Version 2.0 of January 29, 1997 MIPS R10000 Microprocessor User's Manual
Table of Contents ix Superscalar Instruction Issue..............................................................................................20 Speculative Execution..........................................................................................................21 Side Effects of Speculative Execution......................................................................21 Nonblocking Caches ............................................................................................................25 R10000-Specific CPU Instructions................................................................................................26 PREF.......................................................................................................................................26 LL/SC ....................................................................................................................................27 SYNC......................................................................................................................................28 Performance ....................................................................................................................................28 User Instruction Latency and Repeat Rate .......................................................................29 Other Performance Issues ...................................................................................................31 Cache Performance ..............................................................................................................31 MIPS R10000 Microprocessor User's Manual Version 2.0 of January 29, 1997
Page 1 and 2: MIPS R10000 Microprocessor User’s
Page 3 and 4: Acknowledgments This book represent
Page 5 and 6: About This Manual Glossary Stylisti
Page 7: Table of Contents vii Contents Ackn
Page 11 and 12: Table of Contents xi 3 Interface Si
Page 13 and 14: Table of Contents xiii 5 Secondary
Page 15 and 16: Table of Contents xv SysAD[63:0] Ad
Page 17 and 18: Table of Contents xvii 7 Clock Sign
Page 19 and 20: Table of Contents xix 9 Error Prote
Page 21 and 22: Table of Contents xxi 11 JTAG Inter
Page 23 and 24: Table of Contents xxiii 13 Packagin
Page 25 and 26: Table of Contents xxv Branch on Cop
Page 27 and 28: Table of Contents xxvii 16 Memory M
Page 29 and 30: Table of Contents xxix 18 A Cache T
Page 31 and 32: 1. Introduction to the R10000 Proce
Page 33 and 34: Introduction to the R10000 Processo
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Introduction to the R10000 Processo
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Introduction to the R10000 Processo
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2. System Configurations The R10000
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System Configurations 35 2.2 Multip
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3. Interface Signal Descriptions Th
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Interface Signal Descriptions 39 3.
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4. Cache Organization and Coherency
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Cache Organization and Coherency 47
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5. Secondary Cache Interface The pr
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Secondary Cache Interface 61 5.2 Se
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Secondary Cache Interface 63 Indexi
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Secondary Cache Interface 65 Errata
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Secondary Cache Interface 67 SCTag(
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Secondary Cache Interface 69 4-Word
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Secondary Cache Interface 71 16 or
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Secondary Cache Interface 73 5.7 Wr
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Secondary Cache Interface 75 8-Word
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Secondary Cache Interface 77 Tag Wr
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6. System Interface Operations The
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System Interface Operations 81 6.4
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System Interface Operations 85 Mult
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System Interface Operations 87 Exte
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System Interface Operations 91 Outg
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System Interface Operations 97 Duri
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System Interface Operations 99 Erra
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System Interface Operations 101 Cyc
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System Interface Operations 103 Sys
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System Interface Operations 111 Mul
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System Interface Operations 113 Err
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System Interface Operations 115 Pro
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System Interface Operations 127 Ext
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System Interface Operations 143 Coh
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System Interface Operations 147 The
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System Interface Operations 149 In
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7. Clock Signals The R10000 process
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Clock Signals 157 7.2 Secondary Cac
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8. Initialization This section desc
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Initialization 161 Errata Vcc VccQ[
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Initialization 163 8.4 Soft Reset S
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Initialization 165 Table 8-1 (cont.
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9. Error Protection and Handling Th
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Error Protection and Handling 169 9
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Error Protection and Handling 177 D
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Error Protection and Handling 179 T
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Error Protection and Handling 181 E
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Error Protection and Handling 183 W
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Error Protection and Handling 185 P
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10. CACHE Instructions This chapter
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CACHE Instructions 189 TLB Refill a
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CACHE Instructions 191 Op Field Enc
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CACHE Instructions 193 10.4 Index W
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CACHE Instructions 195 10.7 Index L
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CACHE Instructions 197 10.11 Hit In
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CACHE Instructions 199 10.15 Hit Wr
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CACHE Instructions 201 10.17 Index
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11. JTAG Interface Operation Errata
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JTAG Interface Operation 205 11.2 I
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JTAG Interface Operation 207 ‡ Wi
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12. Electrical Specifications This
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Electrical Specifications 211 DCOk
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Electrical Specifications 213 Unuse
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Electrical Specifications 215 12.2
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Electrical Specifications 217 12.3
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13. Packaging The R10000 microproce
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Packaging 221 Electrical Characteri
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Packaging 223 Figure 13-1 R10000 59
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Packaging 225 Table 13-3 (cont.) Si
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Packaging 231 Figure 13-3 599LGA PW
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Packaging 233 Figure 13-5 599LGA Bo
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14. Coprocessor 0 This chapter desc
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Coprocessor 0 237 14.1 Index Regist
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Coprocessor 0 239 14.3 EntryLo0 (2)
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Coprocessor 0 241 14.4 Context (4)
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Coprocessor 0 243 14.6 Wired Regist
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Coprocessor 0 245 14.9 EntryHi Regi
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Coprocessor 0 247 CU2 CU2 CU1 CU1 C
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Coprocessor 0 249 Diagnostic Status
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Coprocessor 0 251 Coprocessor Acces
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Coprocessor 0 253 Table 14-13 Cause
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Coprocessor 0 255 14.13 Processor R
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Coprocessor 0 257 14.15 Load Linked
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Coprocessor 0 259 14.17 XContext Re
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Coprocessor 0 261 14.19 Diagnostic
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Coprocessor 0 263 Errata There are
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Coprocessor 0 265 Errata Errata The
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Coprocessor 0 267 Event 1 for Count
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Coprocessor 0 269 Event 6 for Count
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Coprocessor 0 271 Event 14 for Coun
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Coprocessor 0 273 14.21 ECC Registe
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Coprocessor 0 275 CacheErr Register
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Coprocessor 0 277 CacheErr Register
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Coprocessor 0 279 Errata Primary In
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Coprocessor 0 281 Errata Errata Sec
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Coprocessor 0 283 Primary Data Cach
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Coprocessor 0 285 14.25 CP0 Instruc
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Coprocessor 0 287 14.27 CACHE Instr
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Coprocessor 0 289 Cache CACHE (cont
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Coprocessor 0 291 14.29 DMTC0 Instr
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Coprocessor 0 293 14.31 MFC0 Instru
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Coprocessor 0 295 MTPS 31 Format: M
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Coprocessor 0 297 14.34 TLBP Instru
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Coprocessor 0 299 14.36 TLBWI Instr
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15. Floating-Point Unit This sectio
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Floating-Point Unit 303 15.2 Floati
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Floating-Point Unit 305 Load and St
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Floating-Point Unit 307 63 63 Doubl
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Floating-Point Unit 309 Floating-Po
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Floating-Point Unit 311 Loading the
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Floating-Point Unit 313 Moves and C
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16. Memory Management This section
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Memory Management 317 Addressing Mo
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Memory Management 319 32-bit User M
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Memory Management 321 32-bit Superv
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Memory Management 323 32-bit Kernel
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Memory Management 325 0X BFFFFFFF 0
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Memory Management 327 64-bit Virtua
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Memory Management 329 Using the TLB
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17. CPU Exceptions This chapter des
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CPU Exceptions 333 17.3 TLB Refill
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CPU Exceptions 335 Priority of Exce
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CPU Exceptions 337 Soft † Reset E
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CPU Exceptions 339 NMI Exception Ca
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CPU Exceptions 341 TLB Exceptions T
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CPU Exceptions 343 TLB Invalid Exce
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CPU Exceptions 345 Cache Error Exce
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CPU Exceptions 347 Integer Overflow
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CPU Exceptions 349 System Call Exce
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CPU Exceptions 351 Reserved Instruc
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CPU Exceptions 353 Floating-Point E
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CPU Exceptions 355 Interrupt Except
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CPU Exceptions 357 17.5 COP0 Instru
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18. Cache Test Mode The R10000 proc
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Cache Test Mode 361 18.3 Entering C
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Cache Test Mode 363 18.5 SysAD(63:0
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Cache Test Mode 365 Auto-Increment
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Cache Test Mode 367 Auto-Increment
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A. Glossary The following terms are
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A.6 Dynamic Scheduling The R10000 p
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A.11 Nonblocking Loads and Stores M
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A.13 Logical and Physical Registers
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Index I-1 Index Numerics 16-word, c
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Index I-3 uncached accelerated, des
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Index I-5 branch on CP0 instruction
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Index I-7 F fetch pipeline 6, 17 fe
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Index I-9 TLBWR 285, 300 unsupporte
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Index I-11 NMI see also nonmaskable
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Index I-13 CP0 (description of) 235
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Index I-15 SysAD[20:16] interrupt r
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Index I-17 SysWrRdy, signal 41, 118
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