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

[Zang Roy-r61911]

> > +static void __init mpc7448_hpc2_map_io(void) {
> > +	/* PCI IO  mapping */
> > +	io_block_mapping(MPC7448_HPC2_PCI_IO_BASE_VIRT,
> > +			 MPC7448_HPC2_PCI_IO_BASE_PHYS, 
> 0x00800000, _PAGE_IO);
> > +	/* Tsi108 CSR mapping */
> > +	io_block_mapping(TSI108_CSR_ADDR_VIRT, TSI108_CSR_ADDR_PHYS,
> > +			 0x100000, _PAGE_IO);
> > +
> > +	/* PCI Config mapping */
> > +	io_block_mapping(MPC7448_HPC2_PCI_CFG_BASE_VIRT,
> > +			 MPC7448_HPC2_PCI_CFG_BASE_PHYS,
> > +			 MPC7448_HPC2_PCI_CFG_SIZE, _PAGE_IO);
> > +
> > +	tsi108_pci_cfg_base = MPC7448_HPC2_PCI_CFG_BASE_VIRT;
> > +	/* NVRAM mapping */
> > +	io_block_mapping(MPC7448_HPC2_NVRAM_BASE_ADDR,
> > +			 MPC7448_HPC2_NVRAM_BASE_ADDR, 
> MPC7448_HPC2_NVRAM_SIZE,
> > +			 _PAGE_IO);
> > +}
> 
> io_block_mapping is bad ! see endless discussions in the 
> archives of why ... Use ioremap.

If I really need to use bat0 or bat1( I see that the general mmu use 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 
virtual address use ioremap.