how can I use sdram

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hello,everybody:

I want to use off chip sdram as a data menmory.

First I store some data in sdram.

Second I want process these data in nios II processor using c language.

But how can I read these data from sdram in nios II IDE platform.

Shall I use IORD or using arry pointer.

Thank you !!

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Thank you! I know his.But how can I use shese data in NIOS　II IDE.SUCh as

I store 1,2,3,4,...5000 in SDRAM in advance.Then in NIOS II IDE,I want to read these data,so I can process these data by c language.How can I read?

Shall there have a function or outher methods.