problem with read the avlon bus

Altera_Forum · ‎12-30-2005

my extern device's physical address is start from 0x010008F0 , what address should i read in the uclinux kernel ?

someone can help me ?

Altera_Forum · ‎12-30-2005

Hi rawbeer,

> what address should i read in the uclinux kernel ?

Use the same address. If you are using a data cache, you should use the readx/writex

macros [i.e. - readb()/writeb(), readw()/writew() etc.] to bypass the cache. They

are defined in asm/io.h.

You might want to look at the following thread as well if you plan on trying to

access the device from a user application (rather than a driver):

Regards,

--Scott