TC1784
CPU Subsystem
User´s Manual
2-14
V1.1, 2011-05
CPU, V3.03
uncorrectable error in the associated tag way is detected, any other result is considered
a miss. In the normal case where no error is detected in either tag way then the cache
line is filled/refilled as normal. In the case of a cache miss where an error is detected in
one of the tag ways and the cache line does not contain dirty data the cache controller
replacement algorithm forces the way indicating an error to be replaced when the refill
operation returns. Since such errors are otherwise transparent to the TriCore CPU, the
CCDIE_R counter is incremented to allow counting of such error corrections if required.
In the case where one cache way flags a cache hit, and the other way detects an
uncorrectable error, the error condition is masked and has no effect on the memory
integrity error handling mechanisms. If a cache miss occurs, with an uncorrectable error
detected on the associated data tag way and dirty data detected, then an asynchronous
DIE trap is signalled to the core and any writeback / refill sequence aborted. The trap
handler is responsible for invalidating the cache line and processing any associated dirty
data if possible, or taking other corrective action. Similar action is taken for forced cache
writeback using the cache manipulation instructions.
Содержание TC1784
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