Question about uclinux on nios

Altera_Forum · ‎01-03-2007

I'm studying nios and uclinux and met a question when I read source code in linux-2.0.x on cvs.uclinux.org.

The question is:

At the entry of sys_fork and sys_vfork, why use SAVE_LAST_WINDOW and STORE_WINDOW to store essential reg info? but at the entry of sys_clone, use FLUSH_WINDOWS. From the codes of the same part of sparcnommu, it use the method similar to FLUSH_WINDOWS to store essential reg info at the entry of sys_fork, sys_vfork, sys_clone.

So why use SAVE_LAST_WINDOW and STORE_WINDOW but not FLUSH_WINDOWS in nios porting? and what it means the spare_reg_window variable in thread_struct struct in asm-niosnommu/processor.h?

thanks!

Altera_Forum · ‎01-04-2007

You should not work on Nios anymore. You should move to Nios II.

Follow the wiki,

http://nioswiki.jot.com/%c2%b5clinux (http://nioswiki.jot.com/%c2%b5clinux)

Altera_Forum · ‎01-05-2007

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originally posted by hippo@Jan 3 2007, 08:35 PM

you should not work on nios anymore. you should move to nios ii.

follow the wiki,

http://nioswiki.jot.com/%c2%b5clinux (http://nioswiki.jot.com/%c2%b5clinux)

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thanks for your reply, hippo.

But I still want to understand those macro's usage http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/biggrin.gif