[U-Boot] [PATCH v3 025/108] x86: tpl: Add a fake PCI bus

[Bin Meng]

On Mon, Oct 28, 2019 at 3:12 PM Bin Meng <bmeng.cn at gmail.com> wrote:
>
> On Mon, Oct 21, 2019 at 11:40 AM Simon Glass <sjg at chromium.org> wrote:
> >
> > In TPL we try to minimise code size so do not include the PCI subsystem.
> > We can use fixed BARs and drivers can directly program the devices that
> > they need.
> >
> > However we do need to bind the devices on the PCI bus and without PCI this
> > does not ordinarily happen. As a work-around, define a fake PCI bus which
> > does this binding, but no other PCI operations. This is a convenient way
> > to ensure that we can use the same device tree for TPL, SPL and U-Boot
> > proper:
> >
> >    TPL    - CONFIG_TPL_PCI is not set (no auto-config, fake PCI bus)
> >    SPL    - CONFIG_SPL_PCI is set (no auto-config but with real PCI bus)
> >    U-Boot - CONFIG_PCI is set (full auto-config after relocation)
> >
> > Signed-off-by: Simon Glass <sjg at chromium.org>
> > ---
> >
> > Changes in v3:
> > - Fix 'autoallocation' typo
> > - Improve wording in commit message
> >
> > Changes in v2: None
> >
> >  arch/x86/lib/tpl.c | 25 +++++++++++++++++++++++++
> >  1 file changed, 25 insertions(+)
> >
>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>

applied to u-boot-x86, thanks!