MIPS R10000 Microprocessor User's Manual - SGI TechPubs Library

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134 Chapter 6. External Allocate Request Number Request Protocol Cycle SysClk Master SysReq* SysGnt* SysRel* SysCmd(11:0) SysCmdPar SysAD(63:0) SysADChk(7:0) SysVal* SysRdRdy* SysWrRdy* SysState(2:0) SysStatePar SysStateVal* SysResp(4:0) SysRespPar SysRespVal* An external agent issues an external allocate request number request to reserve a request number for private use. Once allocated, the processor is prevented from using the request number until an external completion response for the request number is received. An external agent issues an external allocate request number request with a single address cycle; this address cycle consists of the following: • negating SysCmd[11] • driving a free request number on SysCmd[10:8] • driving the allocate request number command on SysCmd[7:5] • asserting SysVal* An external agent may only issue an external allocate request number request address cycle when the System interface is in slave state and there is a free request number. The external agent may have as many as eight external allocate request number requests outstanding on the System interface at any given time. Figure 6-21 depicts three external allocate request number requests. Since the System interface is initially in master state, the external agent must first negate SysGnt* and then wait until the processor relinquishes mastership of the System interface by asserting SysRel*. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 P0 P0 P0 P0 P0 - EA EA EA EA EA EA EA EA EA EA EA Figure 6-21 External Allocate Request Number Request Protocol Version 2.0 of January 29, 1997 MIPS R10000 Microprocessor User's Manual Alc Alc Alc
System Interface Operations 135 External Invalidate Request Protocol Cycle SysClk Master SysReq* SysGnt* SysRel* SysCmd(11:0) SysCmdPar SysAD(63:0) SysADChk(7:0) SysVal* SysRdRdy* SysWrRdy* SysState(2:0) SysStatePar SysStateVal* SysResp(4:0) SysRespPar SysRespVal* An external agent issues an external invalidate request to invalidate a secondary cache block. An external agent issues an external invalidate request with a single address cycle. This address cycle consists of the following: • negating SysCmd[11] • driving a request number on SysCmd[10:8] • driving the invalidate command on SysCmd[7:5] • driving the ECC check indication on SysCmd[0] • driving the target indication on SysAD[63:60] • driving the physical address on SysAD[39:0] • asserting SysVal* An external agent may only issue an external invalidate request address cycle when the System interface is in slave state; typically a free request number is specified. An external agent may have as many as eight external invalidate requests outstanding on the System interface at any given time. Figure 6-22 depicts three external invalidate requests. Since the System interface is initially in master state, the external agent must first negate SysGnt* and then wait until the processor relinquishes mastership of the System interface by asserting SysRel*. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 P0 P0 P0 P0 P0 - EA EA EA EA EA EA EA EA EA EA EA Figure 6-22 External Invalidate Request Protocol MIPS R10000 Microprocessor User's Manual Version 2.0 of January 29, 1997 Ivd Adr Ivd Adr Ivd Adr
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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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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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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
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Page 143 and 144: System Interface Operations 113 Err
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Page 157 and 158: System Interface Operations 127 Ext
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Page 177 and 178: System Interface Operations 147 The
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Page 185 and 186: 7. Clock Signals The R10000 process
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Page 189 and 190: 8. Initialization This section desc
Page 191 and 192: Initialization 161 Errata Vcc VccQ[
Page 193 and 194: Initialization 163 8.4 Soft Reset S
Page 195 and 196: Initialization 165 Table 8-1 (cont.
Page 197 and 198: 9. Error Protection and Handling Th
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Page 207 and 208: Error Protection and Handling 177 D
Page 209 and 210: Error Protection and Handling 179 T
Page 211 and 212: Error Protection and Handling 181 E
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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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