Freescale Semiconductor MPC8260 PowerQUICC II Family Reference Manual page 285

60x Bus Specification
1
TT[0–4]
Command Transaction
1XX01 Reserved
for
customer
00010 WR w/flush Single-beat
00110 WR w/Kill
01010 Read
01110 Read with
intent to
modify
10010 WR w/flush
atomic
10110 Reserved
11010 Read
atomic
11110 Read with
intent to
modify
atomic
00011 Reserved
00111 Reserved
01011 Read with
no intent to
cache
01111 Reserved
1XX11 Reserved
for
customer
1
TT1 can be interpreted as a read-versus-write indicator for the bus.
2
This column specifies the TT encoding for the general 60x protocol. The processor generates or snoops only a subset
of those encodings.
Regarding
Freescale Semiconductor
Table 8-2. Transfer Type Encoding (continued)
2
PowerQUICC II as Bus Master
Bus Trans.
— Not applicable Not applicable
Single-beat
write or write
Burst
Burst Burst
(non-GLB)
Single-beat Single-beat
read or burst read
Burst Burst
Single-beat Single-beat
write write
Not Not applicable Not applicable
applicable
Single-beat Single-beat
read or burst read
Burst Burst
— Not applicable Not applicable
— Not applicable Not applicable
Single-beat Not applicable Not applicable
read or burst
— Not applicable Not applicable
— Not applicable Not applicable
Table 8-2:
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
PowerQUICC I
I as Snooper
Transaction Source Action on Hit
Not applicable
CI, WT store, or Flush, cancel
non-processor master reservation
under
Castout, ca-op push, Kill, cancel
or snoop copyback reservation
CI load, CI I-fetch or Clean or flush
nonprocessor master
Load miss, store Flush
miss, or I-fetch
stwcx Flush, cancel
reservation
Not applicable
lwarx (CI load) Clean or flush
lwarx (load miss) Flush
Not applicable
Not applicable
Clean
Not applicable
Not applicable
NOTE
The 60x Bus
PowerQUICC II
as Slave
Action on Slave Hit
Illegal
Write, assert AACK
and TA.
Write, assert AACK
and TA.
Read, assert AACK
and TA.
Read, assert AACK
and TA.
Write, assert AACK
and TA
Illegal
Read, assert AACK
and TA
Read, assert AACK
and TA
Illegal
Illegal
Read, assert AACK
and TA
Illegal
Illegal
8-11