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Altera_Forum's avatar
Altera_Forum
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15 years ago

Dual NIOS exception overwrite

When I load the second NIOS code, it overwrites the exception handler in the first NIOS space. I'm using a shared ddr_sdram, but neither core's linker maps overlap. Exception addresses are 08000...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

well I don't think I'd be able to help, but if I were you I'd start looking to see what is causing the problem by:

- Would the same address range be overwritten if there was only one processor in the system?

- Is the address being overwritten in fact the same as the other Nios's ISR? I'd check this by changing the Nios's base address.

- Would it matter that you load the Nios that has the higher address (09X...) first, then the other one?

Cheers,

Kaveh