IBM PowerPC 604 User Manual page 165

Table 3-6. cache Actions (Continued)
Cache
MESI
Action
Bus Bus
TT0-4
Rsv'n
Snoop
Action
WIM State Operation WIM Response
M Snoop- xx1 00110 Yes (None) Paradox-no one else should be
write with (and
writing if this cache is M.
kill
reset) Mark cache block I.
Release reservation.
I Snoop- xx1 10010
None
(None) No-op
write with
flush
atomic
I Snoop- xx1 10010 Yes (None) Release reservation.
write with (and
flush reset)
atomic
s
Snoop-
xx1 10010 None (None) Mark cache block I.
write with
flush
atomic
s
Snoop- xx1 10010 Yes (None) Mark cache block I.
write with (and Release reservation.
flush reset)
atomic
E
Snoop-
xx1 10010 None
(None) Paradox-no one else should be
write with writing if this cache is E.
flush Mark cache block I.
atomic
E Snoop- xx1 10010 Yes
(None)
Paradox-no one else should be
write with (and writing if this cache is E.
flush reset)
Mark cache block I,
atomic
release reservation.
M Snoop- xx1 10010 None
~&§m
Paradox-no one else should be
write with writing if this cache is M.
flush
Attempt to write block back to
atomic
main memory;
ii successful, mark cache block I
M Snoop- xx1 10010 Yes
~&§m
Paradox-no one else should be
write with (and writing if this cache is M.
flush reset)
Attempt to write block back to
atomic
main memory;
if successful: mark cache block I,
release reservation.
(l'Va)
Snoop- xx1 11000 (!Va)
(None) Respond with (none) when the
TLB
n.e
has been invalidated.
invalidate
3-42
PowerPC 604 RISC Microproceseor User's Manual