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Altera_Forum's avatar
Altera_Forum
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20 years ago

uClinux boot from epcs ?

If someone like me wants to run uCLinux on a Nios2 but the fpga must not be a bga type then the biggest fpga available is EP2C20 with QFP 240 pins. That one can be handsoldered http://forum.niosforu...
Altera_Forum's avatar
Altera_Forum
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20 years ago

Hi Michael,

> booting uCLinux from epcs. but not the whole uclinux. i think of a smal bootloader

> like lilo (grub under debian) that loads the rest from a compact flash card that

> can't be big enough

You can use u-boot in such a design ... as it supports CF as well as epcs. If your

epcs is large enough, you could fit the entire kernel ... u-boot can load, decompress,

and boot a gzip/bzip kernel image (same goes for CF of course).

Currently, I load u-boot from epcs and then boot a gzipped kernel image (~520 KB)

either from parallel flash, a tftp server, or an NFS server. Same goes for the cramfs

filesystem (which gets stuffed into SDRAM as well).

Regards,

--Scott