How does one get physical address for iorempped window?

[ Perhaps not directly linux-ppc question ]

I am trying to get jffs working on my board and in trying to debug this
I need to know this.  The jffs driver requires that I map the flash address
space usinng ioremap_nocache or ioremap, when debugging I need to see exactly
which addresses its writing the CFI query commands.

My question is --

If I map memory window using ioremap_nocache() if I use virt_to_phys()
should one get back the actual physical address? If virt_to_phys is not
the correct function to use, how do I get  exact physical address?

Thanks.

/Subodh Nijsure

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Subodh Nijsure wrote:

If I map memory window using ioremap_nocache() if I use virt_to_phys()
should one get back the actual physical address?

Ummmm....you give ioremap_nocache() a physical address to map, so
you have to know it........Using virt_to_phys() may not give you
the proper physical address, depending upon the platform.  I'm working
on a solution for 2.5 that will work.  Currently, it is wrapped into
a heavier weight virt_to_bus/phys() but that many not be the right
place.



	-- Dan

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