[PATCH 09/15] [POWERPC] 86xx: Add uli1575 pci-bridge sector to MPC8641HPCN dts file.
Kumar Gala
galak at kernel.crashing.org
Thu Jun 28 06:43:39 EST 2007
On Jun 27, 2007, at 3:39 PM, Segher Boessenkool wrote:
>>> - ranges = <0 f8000000 00100000>;
>>> - reg = <f8000000 00100000>; // CCSRBAR 1M
>>> + ranges = <00001000 f8001000 000ff000
>> [...]
>>> + reg = <f8000000 00001000>; // CCSRBAR
>>
>> This can't be right, and I suspect it will break any kernel access to
>> the first 0x1000 bytes of the CCSR_BAR space. reg should actually
>> describe the register space of the SOC. If ranges needs to specify
>> that, too, they should be able to be redundant. But this looks like
>> a big hack, to me. Am I missing something?
>
> "reg" and "ranges" can never overlap really.
>
> Is this the special case where the PHB is visible in
> PCI configuration space?
>
> Or, please explain what CCSR_BAR is...
Its a 1M MMIO register space on the SOC (all device registers on the
SOC live there).
- k
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