RE: [PATCH/2.6.17-rc4 1/10] Powerpc: Add general support for mpc7 448h pc2 (Taiga) platform

On Fri, 2006-06-02 at 15:38 +0800, Liu Dave-r63238 wrote:

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If I really need to use bat0 or bat1( I see that the 

general mmu use 

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bat2 and bat3,
where should I set up them?

For tsi108 pci configuration access, I need to map 16Mbyte
physical address.  If I do not use an extra bat, I can not 

get the correct 

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virtual address use ioremap.

What do you mean ? An ioremap will work, it will give you any 
virtual address, you just have to store that in a global 
instead of hard coding it. Hard coded virtual addresses are 
bad. Especially for things like PCI config space that really 
isn't performance sensitive.

I agree ben about PCI config space, It should use ioremap
 to get virtual address. No performace indeed. 

I think we need find the root cause that the ioremap failed.

How much RAM do you have ? Maybe you are running out of virtual space ?

Ben.