[coreboot-gerrit] Change in coreboot[master]: libpayload: Add support for PCI MMIO CONFIG access.

[Prasad Malisetty (Code Review)]

Attention is currently required from: Shelley Chen, Ravi kumar, Furquan Shaikh, Arthur Heymans.
Prasad Malisetty has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/57615 )

Change subject: libpayload: Add support for PCI MMIO CONFIG access.
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Patch Set 18:

(2 comments)

Patchset:

PS17:
> Hi Prasad, I've created a CL with proposed code changes for the libpayload MMIO ops for PCI CONFIG s […]

Hi Shelley,

Thanks for the update.

I have acknowledged your comments. I will update new patch series with addressing all comments.

Thanks
-Prasad

File payloads/libpayload/drivers/pci_ops.c:

https://review.coreboot.org/c/coreboot/+/57615/comment/beaad023_278764d3 
PS17, Line 34: uintptr_t get_pci_mmio_cfgbase(pcidev_t dev)
> This only works if you have one device, correct?  Would it be possible to port the coreboot atu mapp […]

ATU configuration needed for every config/mem read/write. ATU configuration  function is in coreboot PCIe driver. I am not really how we can call coreboot functions from payloads. Could you please help if we have that infra.

Thanks
-Prasad