MPC8280 datasheet(286/1386 Pages) FREESCALE

286 / 1386 page

The 60x Bus

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

8-10

Freescale Semiconductor

Table 8-2. Transfer Type Encoding

TT[0–4]1

60x Bus Specification2

MPC8280 as Bus Master

MPC8280 as

Snooper

MPC8280

as Slave

Command

Transaction

Bus Trans.

Transaction Source

Action on Hit

Action on Slave Hit

00000

Clean block

Address only

Address only (if

enabled)

dcbst (if enabled)

Not applicable

AACK asserted;

MPC8280 takes no

further action.

00100

Flush block

Address only

Address only (if

enabled)

dcbf (if enabled)

Not applicable

AACK is asserted;

MPC8280 takes no

further action.

01000

sync

Address only

Address only (if

enabled)

sync (if enabled)

Not applicable

Assert AACK. BG is

negated until MPC8280

buffers are flushed.

01100

Kill block

Address only

dcbz or dcbi (if

enabled)

Flush, cancel

reservation

AACK is asserted.

10000

eieio

Address only

Address only (if

enabled)

eieio (if enabled)

Not applicable

Assert AACK. BG is

negated until MPC8280

buffers are flushed.

101 00

Graphics

write

Single-beat

write

Single-beat

write

(non-GBL)

ecowx

Not applicable

No action.

11000

TLB

invalidate

Address only

Not applicable

AACK is asserted;

MPC8280 takes no

further action.

11100

Graphics

read

Single-beat

read

Single-beat

read (non-GBL)

eciwx

Not applicable

MPC8280 takes no

action.

00001

lwarx

reservation

set

Address only

Not applicable

Address-only

operation. AACK is

asserted; MPC8280

takes no further action.

00101

Reserved

—

Not applicable

Illegal

01001

tlbsync

Address only

Not applicable

Address-only

operation. AACK is

asserted; MPC8280

takes no further action.

01101

icbi

Address only

Not applicable

Address-only

operation. AACK is

asserted; MPC8280

takes no further action.

1XX01

Reserved

for customer

—

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.

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