On Tue, Oct 22, 2019 at 1:54 AM Simon Glass sjg@chromium.org wrote:
On Mon, 21 Oct 2019 at 01:52, Andy Shevchenko andy.shevchenko@gmail.com wrote:
On Mon, Oct 21, 2019 at 7:24 AM Simon Glass sjg@chromium.org wrote:
PCI(e) bus is present in a lot of SoCs (not exclusively x86). Perhaps better idea is to have something like lib/pci.c with minimum support for PCI type 1 and probably PCI type 2 accessors and other very basic functions.
I don't know of any use case for PCI in TPL on other platforms.
x86 is I think unique in that it requires PCI to do anything.
I don't think so. PCI is a core part of the SoC, indeed, though what exactly do we need from it here? IO accessors to PCI configuration space?
For other platforms I am familiar with they can boot a fair way without it.
Perhaps we may achieve the same here?
I do want to avoid the premature-optimisation problem, i.e. inventing new use cases that no one uses. The only thing we really know right now is that we need this for newer x86 platforms.