Freescale Semiconductor MPC8260 - Manual (Page 285)

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