MIPS R10000 Microprocessor User's Manual - SGI TechPubs Library

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72 Chapter 5. Tag Read Sequence Cycle SCClk SC[A,B]Addr(18:0) SCTagLSBAddr SC[A,B]DWay SCData(127:0) SCDataChk(9:0) SC[A,B]DOE* SC[A,B]DWr* SC[A,B]DCS* SCTWay SCTag(25:0) SCTagChk(6:0) SCTOE* SCTWr* SCTCS* A tag read sequence is performed when the state of a secondary cache block is required, but it is not necessary to access the data array. This sequence is used for the CACHE Index Load Tag (S) instruction. Figure 5-6 depicts a secondary cache tag read sequence. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Adr0 X TagX Figure 5-6 Tag Read Sequence Version 2.0 of January 29, 1997 MIPS R10000 Microprocessor User's Manual
Secondary Cache Interface 73 5.7 Write Sequences Errata There are five basic write sequences: • a 4-word write. • an 8-word write • a 16-word write • a 32-word write • a tag write The SCClk referred in the secondary cache read and write timing diagrams is an internal SCClk. The relationship between this internal SCClk and the external SCClk[5:0]/SCClk[5:0]* can be programmed during boot time by setting the SCClkTap mode bits (see the section titled “Mode Bits” in Chapter 8 for detail on mode bits). MIPS R10000 Microprocessor User's Manual Version 2.0 of January 29, 1997
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MIPS R10000 Microprocessor User’s
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Acknowledgments This book represent
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About This Manual Glossary Stylisti
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Table of Contents vii Contents Ackn
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Table of Contents ix Superscalar In
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Table of Contents xi 3 Interface Si
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Table of Contents xiii 5 Secondary
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Table of Contents xv SysAD[63:0] Ad
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Table of Contents xvii 7 Clock Sign
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Table of Contents xix 9 Error Prote
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Table of Contents xxi 11 JTAG Inter
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Table of Contents xxiii 13 Packagin
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Table of Contents xxv Branch on Cop
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Table of Contents xxvii 16 Memory M
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Table of Contents xxix 18 A Cache T
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1. Introduction to the R10000 Proce
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Introduction to the R10000 Processo
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Page 51 and 52: Introduction to the R10000 Processo
Page 63 and 64: 2. System Configurations The R10000
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Page 67 and 68: 3. Interface Signal Descriptions Th
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Page 75 and 76: 4. Cache Organization and Coherency
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Page 89 and 90: 5. Secondary Cache Interface The pr
Page 91 and 92: Secondary Cache Interface 61 5.2 Se
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Page 95 and 96: Secondary Cache Interface 65 Errata
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Page 105 and 106: Secondary Cache Interface 75 8-Word
Page 107 and 108: Secondary Cache Interface 77 Tag Wr
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Page 115 and 116: System Interface Operations 85 Mult
Page 117 and 118: System Interface Operations 87 Exte
Page 121 and 122: System Interface Operations 91 Outg
Page 127 and 128: System Interface Operations 97 Duri
Page 129 and 130: System Interface Operations 99 Erra
Page 131 and 132: System Interface Operations 101 Cyc
Page 133 and 134: System Interface Operations 103 Sys
Page 141 and 142: System Interface Operations 111 Mul
Page 143 and 144: System Interface Operations 113 Err
Page 145 and 146: System Interface Operations 115 Pro
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System Interface Operations 123 Pro
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System Interface Operations 127 Ext
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System Interface Operations 131 Cyc
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System Interface Operations 141 6.1
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System Interface Operations 143 Coh
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System Interface Operations 145 Err
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System Interface Operations 147 The
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System Interface Operations 149 In
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System Interface Operations 151 Cyc
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System Interface Operations 153 6.2
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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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