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- SetCacheMode can be used to set the Zorro2 cache modes
- to noncacheable to handle certain PC-Bridgecards.
-
- SetCacheMode ADDRESS/A/K SIZE/A/K COPYBACK/S WRITETHROUGH NOCACHE/S NOCACHESERIALIZED/S VERBOSE/S
-
- Address represents the start address...should be legal memory/z2 config area.
- If this area doesn't exist you're in trouble. This means if you have a Z2
- board at $200000 to $400000 but nothing behind $400000 you SHOULD NOT use
- SetCacheMode to manipulate $400000 and beyond.
-
- Size sets the size of the address which cache modes should be changed.
- Don't use a Size that doesn't cover legal memory.
-
- CopyBack sets the mode of the address range to Copyback.
- Read/Write accesses are done through the Cache and if the Cache
- needs place it writes down a Line(16 Bytes) and read a new Line.
-
- Writethrough sets the mode of the address range to Writethrough
- Read accesses are done through the Cache but Write Access go to
- the Cache and to the Memory at once. This mode is speeded up by
- the cpu060 writebuffer option which is set by default.
-
- NoCache sets the mode of the address range to NoCache.
- Read and Write accesses don't use the Cache.
-
- NoCacheSerialized sets the mode of the address range to NoCacheSerialized.
- Read and Write accesses don't use the Cache and go out in the right order.
- This mode is important for IO Addresses
-
- Example to set the whole Z2 area as noncacheable and serialized
-
- SetCacheMode address=$200000 size=$800000 nocacheserialized verbose
-