Technical data

3-60 Computer Group Literature Center Web Site
Test Descriptions
3
WBFL - Write Back w/Flush
Command Input
PPCx-Diag>l2cache wbfl
Description
This test performs a write/read test on the L2 Cache. This test verifies that
the device can be both accessed and that the L2 Cache Flush control works.
The test flow is as follows:
Turn off the cache. Write an incrementing pattern to memory and verify
that the pattern is in memory. Turn on the cache with WriteBack. Write a
decrementing pattern to the cache. Turn off the cache. Verify that the
incrementing pattern is still in memory. Turn on the cache with WriteBack.
Flush the cache, which should flush the cache contents to memory. Turn
off the cache. Verify that the decrementing pattern is in memory.
Response/Messages
After the command has been issued, the following line is printed:
L2CACHE WBFL: L2-Cache WriteBack w/ Flush... Running --->
If all parts of the test are completed correctly, then the test passes:
L2CACHE WBFL: L2-Cache WriteBack w/ Flush... Running ---> PASSED
If any part of the test fails, then the display appears as follows:
L2CACHE WBFL: L2-Cache WriteBack w/ Flush... Running ---> FAILED
L2CACHE/WBFL Test Failure Data:
(error message)
Refer to the section L2CACHE Error Messages for a list of the error
messages and their meaning.