Loading...
Memory Management Unit
MOTOROLA M68060 USER’S MANUAL 4-29
operation and before translation is enabled. PFLUSH can be executed even if the E-bit is
cleared.
Figure 4-21. Address Translation Flowchart
ENTRY
EXIT
OTHERWISE
TAKE ACCESS ERROR
EXCEPTION
ABORT CYCLE
ATC HIT
OTHERWISE
ABORT CYCLE
TABLE SEARCH
OPERATION
TAKE ACCESS ERROR
EXCEPTION
EXIT
OTHERWISE
PA ATC ENTRY [PA]
UPA ATC ENTRY [U1,U0]
CM ATC ENTRY [CM]
PA LOGICAL ADDRESS
UPA TTR1* [U1,U0]
CM TTR1* [CM]
EXIT
PA LOGICAL ADDRESS
UPA TTR0* [U1,U0]
CM TTR0* [CM]
ABORT CYCLE
(TTR1*[W] = 1) AND
(WRITE OR LOCKED
RMW ACCESS)
(TTR0*[W] = 1) AND
(WRITE OR LOCKED
RMW ACCESS)
LOGICAL ADDRESS
MATCHES WITH TTR0*
OTHERWISE
ATC MISS
[(W = 1) AND
(WRITE OR LOCKED RMW CYCLE)
LOGICAL ADDRESS
MATCHES WITH
TTRx*
OTHERWISE
OTHERWISE
(M = 0) AND
(WRITE OR LOCKED RMW CYCLE)
* Refers to either instruction or data transparent translation register.
Loading...
Terms of Use | Privacy Policy | DMCA Policy
2006-2020 Rsmanuals.com