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Altera_Forum
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14 years ago

Can I use 8M sdram for nios2-mmu linux?

hello, I have a custom fpga board with a ep2c20 core, a 8M cfi flash chip, a 8M sdram chip, etc.I design a smallest nios2 sopc with just a sdram controller, uart jtag and nios2-mmu with dual port ...
Altera_Forum's avatar
Altera_Forum
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14 years ago

Something is wrong with the way you've told the kernel about the amount of memory - 'Memory available 29160k/3281k' shows more available than the total size!

I also suspect you need to shrink some kernel data areas in order to run anything useful in 8M - even the Dentry & Inode caches look a bit big, but the 2269k of kernel data is a huge fraction of your 8M.

I'm not a Linux expert - so can't help on actually reducing the size.