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Altera_Forum's avatar
Altera_Forum
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15 years ago

ow to define an uncached linker region

Can anyone tell me how to define a region in the linker to be uncached? An example - I have a block ram I am using for SGDMA descriptor tables that I need to define as uncached... Thanks - Chris
Altera_Forum's avatar
Altera_Forum
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15 years ago

Why don't you use the alt_remap_uncached() function at run time? If you use it on a pointer to the descriptors, it will force the CPU to avoid the cache.

Another alternative could be to flush/invalidate the cache when needed, as is done in the Altera HAL functions that handle the descriptors.