Table of Contents
xxvi MIPS R4000 Microprocessor User's Manual
Update Requests.............................................................................................. 370
Intervention and Snoop Requests .................................................................372
System Interface Data Identifier Syntax ........................................................... 374
Coherent Data ..................................................................................................374
Noncoherent Data............................................................................................ 374
Data Identifier Bit Definitions........................................................................375
System Interface Addresses....................................................................................377
Addressing Conventions ....................................................................................377
Sequential and Subblock Ordering....................................................................378
Processor Internal Address Map............................................................................ 378
13
Secondary Cache Interface
Data Transfer Rates..................................................................................................380
Duplicating Signals..................................................................................................380
Accessing a Split Secondary Cache........................................................................381
SCDChk Bus..............................................................................................................381
SCTAG Bus................................................................................................................ 381
Operation of the Secondary Cache Interface........................................................382
Read Cycles...........................................................................................................383
4-Word Read Cycle..........................................................................................383
8-Word Read Cycle..........................................................................................384
Notes on a Secondary Cache Read Cycle..................................................... 384
Write Cycles..........................................................................................................385
4-Word Write Cycle.........................................................................................385
8-Word Write Cycle.........................................................................................386
Notes on a Secondary Cache Write Cycle....................................................387
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