IBM PowerPC 604 User Manual page 341

BUS TRANSACTIONS
RH = Read Hit CD= Snoop Push
RMS = Read Miss, Shared
RME = Read Miss, Exclusive @=Invalidate Transaction
WH = Write Hit
WM= Write Miss E9= Read-with-Intent-to-Modify
SHR = Snoop Hit on a Read
SHW = Snoop Hit on a Write or
(D
= Cache Block Fill
Read-with-Intent-to-Modify
Figure. 8-15. MESI Cache Coherency Protocol-State Diagram (WIM
=
001)
Table 8-7 shows the CSEO-CSEl encodings.
Table 8-7. CSEO-CSE1 Signals
CSEO-CSE1 cache Set Element
00
Seto
01
Set 1
10 Set2
11
$813
Chapter 8. System Interface Operation 8-31