xPL Proposal

[Tom Rini]

On Fri, Feb 21, 2025 at 08:19:40AM -0600, Tom Rini wrote:
> On Thu, Feb 20, 2025 at 06:30:18PM -0700, Simon Glass wrote:
> > Hi Tom,
> > 
> > On Thu, 20 Feb 2025 at 13:40, Tom Rini <trini at konsulko.com> wrote:
> > >
> > > On Thu, Feb 20, 2025 at 11:13:34AM -0700, Simon Glass wrote:
[snip]
> > > I will look at "splg4" once it's somewhere on source.denx.de and I can
> > > look at it, and refrain from otherwise assuming how it solves the
> > > problems I had seen previously.
> > 
> > I pushed an updated version to dm/splg-working but it is not very
> > updated. Still needs more work.
> 
> Thanks.

So, after doing the remaining CONFIG_TEXT_BASE -> CONFIG_PPL_TEXT_BASE
changes, here's another example of the problem with your approach. What
stops xilinx_zynqmp_kria from building in splg-working is that
BUTTON was missing from scripts/conf_nospl. Annoyingly, a mrproper (or
since I always use O=, rm -rf) is needed for changes there to be picked
up, but that's maybe just a missing Makefile dependency line. But that
just makes it easier to see the next problem, which I don't see the
answer to. For PPL, we can build drivers/spi/zynqmp_gqspi.o just fine.
For SPL however:
  CC      spl/drivers/spi/zynqmp_gqspi.o
/home/trini/work/u-boot/u-boot/drivers/spi/zynqmp_gqspi.c: In function 'zynqmp_qspi_of_to_plat':
/home/trini/work/u-boot/u-boot/drivers/spi/zynqmp_gqspi.c:203:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
  203 |         plat->regs = (struct zynqmp_qspi_regs *)(dev_read_addr(bus) +
      |                      ^
/home/trini/work/u-boot/u-boot/drivers/spi/zynqmp_gqspi.c:205:26: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
  205 |         plat->dma_regs = (struct zynqmp_qspi_dma_regs *)
      |                          ^
 
And I don't see, really, what's even getting us down this error path.

-- 
Tom
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