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Altera_Forum
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14 years ago

Problem rebooting Nios II from uClinux

Dear all, I need to reset Nios II from uClinux. I tried to use "reboot" app from sash but it didn't work. The response is Restarting system and then system freezes. I'm working on...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

When you load the kernel image via JTAG, it loads the compressed image to the link address offset in RAM. Then the image decompresses itself to the beginning of RAM and the jumps there. The compressed image is then erased or overwritten (or at least so I assume, it'd be a horrible waste of memory otherwise). So if you have the processor reset at the link address, that won't work. I don't know if it's possible to get it to reset from the same place the image decompresses to or if there is some other code that needs to be at reset that is not preserved.