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

[Liu Dave-r63238]

> > I had hoped to get the pci configure base address by ioremap, but 
> > failed. the tsi108 register locates at 0xc000,0000 
> ~0xC001,0000. It is 
> > OK to access them by ioremap. While pci configure access need to 
> > ioremap 0xfb00,0000 ~0xfc00,0000. I traced my code, when I 
> do ioremap, 
> > there is no bat match, I get the virtual address from 
> ioremap_bot. the 
> > init ioremap_bot is 0xfe000000. When I do tsi108_csr_vir_base = 
> > ioremap(0xfb000000,0x1000000), the ioremap_bot is 
> 0xfdffe000 ( I get 
> > the serial port ioremap steal some space), tsi108_csr_vir_base = 
> > 0xfdfee000, I can not access the configure space with this address.
> 
> What happens if you try ?
> 
> > While if I use bat0 or bat1 to map my tsi108 register space, the 
> > ioremap_bot will keep to 0xfe000000 until I do 
> tsi108_csr_vir_base = 
> > ioremap(0xfb000000,0x1000000) then I get  tsi108_csr_vir_base = 
> > 0xfd000000. Everything is OK.
> 
> Both should work fine
> 
> Ben.
> 

The smallest BAT size of 74xx is 128KB, but the MPC7448_HPC2_NVRAM_SIZE
Is 0x8000 (32KB) you set in your code. I suggest you set the
MPC7448_HPC2_NVRAM_SIZE is 0x20000, try it.

Dave