[PATCH] pc386 BSP: initialization of PCI bus

[Joel Sherrill <joel@OARcorp.com>]

Keith Robertson wrote:
> Karel Gardas wrote:
> 
>> IIRC Gregory Melke recommended to initializa PCI bus in bsp_startup 
>> function of pc386 BSP early this year. Attach patch tries to implement 
>> this. It is tested on two x86 systems one with 3C905C-TX and other 
>> with Intel's Ethernet NICs.
>>
>> Since till now, initialization of PCI bus was done in appropriate 
>> device driver on pc386 BSP, I hope it is right to place its 
>> initialization after all needed initializations of IRQ and exceptions 
>> management code.
> 
> 
> Karel,
> 
> Do you happen to know if this patch causes any problems on pc386 bsps 
> without a PCI bus?  Personally, I'm particularly interested in qemu with 
> the -isa (aka no pci) option.   However, there's likely(?) other setups 
> without PCI.

That is an issue which would be nice to know the answer to.  But that
only makes it the responsibility of the pc386 to avoid initializing
non-existent hardware at boot time.  It would still be OK for the
NIC drivers to assume that if PCI exists, it is initialized.

Also I realize that many times horizontal changes can only be sanity
checked and compiled.  No one has every target hardware configuration.
We just do the best we can and be careful.

> Cheers,
> 
> Keith


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