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Altera_Forum's avatar
Altera_Forum
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15 years ago

I need some help of creating shared ddr sdram memory

Hi, everyone:), My system is like this : Using NEEK, I created 2 processors both running in the ddr sdram. Processor1's reset vector offset is 0x100 and exception vector offset is 0x120. Proce...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

If your CPUs have a data cache it is possible that they won't detect changes in the main RAM, when the value to read is already crached.

Either change your pointers to non cached, using the alt_remap_uncached() function, or use the IORD/IOWR macros to acces the shared memory. Those macros always bypass the cache.