===================
SoC platform fabric
===================

The SM6350 (``lagoon``) on-die fabric that sits *below* the peripheral drivers
and *below* Android userspace: the storage controllers and their inline crypto,
the TLMM pin-mux, the clock controllers, the RPMh-voted interconnect and system
cache, the GPU/GMU coprocessor, the Always-On Processor (AOP), the PMICs, the
IPA modem-data accelerator, and thermal management. These are the blocks a
replacement bootloader has to bring up (clocks, pinmux, storage) or account
for (GPU, system cache) before it can load and hand off an image. TrustZone
and the other secure-world images are documented separately, in
:doc:`/trustzone/index`.

Everything here is static: device-tree nodes from ``artifacts/boot_a/board.dts``
and the ``dtbo_a`` overlays, the XBL ``uefiplat.cfg`` MMAP table and config keys
carved from ``_READONLY/lun1/xbl_a.bin``, and ``artifacts/boot_a/kernel_config.txt``.
No code was executed; where a fact needs a live register read to confirm, it is
called out as such and folded into :doc:`/open-questions`.

.. toctree::
   :maxdepth: 1

   storage
   pinctrl
   clocks
   interconnect
   gpu
   absent-hardware
   pmic
   aop
   ipa
   thermal