IBM PowerPC 604 User Manual page 151

Table 3-6. C&che Actions (Continued)
Cache
MESI
Action
Bus Bus
TT0-4
Rsv'n
Snoop
Action
WIM State Operation WIM
Response
100 ME
Store Write with
100
00010
(n/a) (None) or
Store to cache
s
flush
'SAD'
store to main memory
101
I Store Write with 101 00010 (n/a) (None) or Write to main memory
flush
'SAD'
(note: no reload on a store miss)
101 ME Store Write with 101 00010
(n/a)
~or
Release the bus
SI flush
~&'SAD'
retry the operation
101
ME Store Write with 101 00010
(n/a) (None) or Store to cache
s
flush
'SAD'
store to main memory
000 SI stwcx. (None)
(n/a) (n/a) None (n/a) Update condition register
000 I stwcx. RWITM 000 11110
Yes (None) or Load the block of data Into cache
atomic (and
'SAD'
release the reservation
reset) i.pdate the condition register
store to cache
markcache M
000 I stwcx. RWITM 000 11110
Yes
~or
Release the bus
atomic
~&'SAD'
retry the oP&ration
000
s
stwcx. Kill
000
01100 Yes (None) or Wait for the kill to be successfully
(and
'SAD'
presented
reset) release reservation
i.pdate condition register
store to cache
mark cache block M
000
s
stwcx. Kill
000
01100 Yes
~or
Release the bus
'XRTFN&'SRD' retry the oP&ration
000 ME stwcx. (None)
(n/a) (n/a) None (n/a)
Update condition register
000 E stwcx. (None)
(n/a) (n/a) Yes (n/a)
Release reservation
(and
i.pdate condition register
reset) store to cache
mark cache block M
000 ME stwcx. (None) (n/a) (n/a) Yes (n/a) (nla)
(and
reset)
000 M stwcx. (None) (nla) (nla) Yes (n/a) Release reservation
(and i.pdate condition register
reset)
store
to cache
001
SI stwcx. (None) (n/a) (n/a) None
(n/a) Update condition register
001 I stwcx. RWITM
001
11110 Yes (None) or Load the block
of
data into cache
atomic (and
'SAD'
release the reservation
reset) i.pdate the condition register
store to cache
markcacheM
001
I stwcx
RWITM 001 11110
Yes 'XRTFNor Release the bus
atomic ARTRY&§m°
retry the oP&ratlon
3-28 PowerPC 604 RISC Microprocessor User's Manual