Re: [parisc-linux] a500.out16

[Richard Hirst <rhirst@linuxcare.com>]

On Thu, Nov 02, 2000 at 10:43:06AM +0000, Richard Hirst wrote:
> On Thu, Nov 02, 2000 at 12:21:36AM -0800, Grant Grundler wrote:
> > Hi Richard (et al),
> > I finally think I understand how pcibios_align_resource() is used...
> > that definitely was the problem. Everything on A500 but PCI-PCI bridge
> > seems to be assigned I/O port and MMIO addresses correctly.
> > 
> > I'll look at tulip code tomorrow to see why it's not happy.
> 
> I fixed tulip_core.c to report what it means, which gave me
> 
> tulip: MMIO resource (0x400@0xfffffffff8020000) unavailable, aborting
> 
> Note sym53c8xx.c doesn't seem to bother with request_mem_region(), so
> maybe request_mem_region() is just broken.

It is broken because of the following line in kernel/resource.c:

struct resource iomem_resource = { "PCI mem", 0x00000000, 0xffffffff, IORESOURCE_MEM };

'end' needs to be rather higher than 0xffffffff on 64 bit.  I changed it to

struct resource iomem_resource = { "PCI mem", 0x00000000, ~0, IORESOURCE_MEM };

and it works.  I havn't committed that 'fix' though.

Richard