[PATCH] [RFC][POWERPC] Merge 32 and 64 bit pci_process_bridge_OF_ranges() instances
vbarshak at ru.mvista.com
Tue Sep 18 22:03:50 EST 2007
Vitaly Bordug wrote:
> + hose->io_base_phys = cpu_phys_addr - pci_addr;
This is not gonna work on 32-bit platform (unless pci_addr == 0).
hose->io_base_phys = cpu_phys_addr;
The other way we should adjust io size like we do on 64-bit and rewrite
resource fixup functions.
> + /* handle from 0 to top of I/O window */
> +#ifdef CONFIG_PPC64
> + hose->pci_io_size = pci_addr + size;
> + hose->io_base_virt = ioremap(hose->io_base_phys, size);
Do we need to ioremap on 64-bit? I think 64-bit uses different approach
in handling io space.
> +#ifdef CONFIG_PPC32
> + if (prim)
> + isa_io_base = (unsigned long)hose->io_base_virt;
What's exactly the point of merging this single function?
If this was intended to add 64-bit physical address support to 32-bit
platforms (like ppc440), then it does not seem sufficient to make pci
stuff work right.
What about the 32-bit pcibios_fixup_resources(),
pcibios_resource_to_bus(), pcibios_bus_to_resource() stuff?
There's still no 64-bit support. You'll get
"PCI Cannot allocate resource region" attempting to initialize resources
at PCI start-up.
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