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Altera_Forum
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21 years ago

Data Cache

I was looking at the documentation, and found that address bit 31 is used to determine cache and non-cachable memory. When bit 31 is low is the memory/IO cachable, or is it non-cachable? Didn't...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Jesse,

Thanks for the reply. Just couple of more questions:

1) How come you can't put memory above the A31? I tried a couple of memory types and it says that the current tool chain does not support a 256MB boundry.

2) If I need to tag memory lower than A31, is there a penalty if I use the alt_remap_uncached function? In another words if I tag 1/2 my memory as uncached, do I take a performance hit in that region?

Rick