IBM PowerPC 604 User Manual page 148

Table 3-6. Cache Actions (Continued)
Cache MESI
Action
Bus Bus
TT0-4
Rsv'n
Snoop
Action
WIM
State Operation WIM Response
100 I
Load
Read
100 01010 (!Va)
ARTRY
or Release the bus
Am'RV&'§m'
retry the operation
100
ME Load (None) (n/a) (n/a) (!Va) (nla) Load from cache
s
101
I Load Read
101 01010
(!Va)
(None) Load the block of data into cache
load from cache
markcache E
101
I Load Read
101 01010
(!Va)
'§ii)
Load the block of data into cache
load from cache
mark cache block S
101
I Load Read
101 01010
(n/a) Jt'RTRVor Release the bus
Am'RV&'§m'
retry the operation
101
ME Load (None) (n/a) (n/a) (!Va) (n/a) Load from cache
s
000 I
lwanc Read
000 11010
Set
(None) .Load the block
of
data into cache
atomic
by
set
reservation
this
op
load from cache
mark cache block E
000
I I wane Read
000 11010
Set
'§ii)
Load the block of data into cache
atomic
by
set
reservation
this op
load from cache
mark cache block S
000
I lwanc Read
000 11010 (!Va)
AlmNor Release the bus
atomic
Am'RV&'§m'
retry the operation
000
ME lwanc lwanc
000
00001
Set (None) or Set reservation
s
reservation
by
~
load from cache
set
this
op
000
ME I wane I wane
000 00001
(!Va) AlmNor Release the bus
s
reservation
Jt'RTRV&~
retry the operation
set
001
I I wane Read
001 11010
Set (None) Load the block
of
data Into cache
atomic
by mark cache block E
this
op set
reservation
load from cache
001
I lwanc Read
001 11010 Set
~
Load the block of data into cache
atomic by
set
reservation
this
op
load from cache
mark cache block S
001
I lwanc Read
001 11010
(!Va) Am'RVor Release the bus
atomic
Am'F!Y&~
retry the operation
001
ME lwanc I wane
001 00001
Set (None) or Set reservation
s
reservation by
~
load from cache
set
this
op
Chapter 3. Cache and Bus Interface Unit Operation
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