tree 79b0204e9f5203d63e576d8429692150e5c8cf86
parent 10c06a97de023d23957c20a6e9f77b869ce5fd55
author Sam Leffler <sleffler@google.com> 1708973854 -0800
committer Sam Leffler <sleffler@google.com> 1715551535 -0700

Initial CHERIoT Soundstream demo

Converts the bare-metal soundstream demo app to a hypothetical sencha
platform (derived from matcha by replacing the SMC Ibex core by a RISC-V
CHERIoT core). This depends on the SEC to boot the SMC from flash and
uses DIF support where possible for peripherals.

Specific changes:
- stick drivers in compartments
- use cheriot-rtos interrupts & threads
- use capabilities for mmio + shared memory refs
- allocate app data from the heap instead of using global vars (temp
  until toolchain is updated)
- hide hard-to-use-directly bits in a compat.h
- use cheriot api's where appropriate (e.g.  __builtin_unreachable -> panic)
- band-aid dif include files to workaround c++ usage

NB: interrupt thread stacks are super-sized to support logging

Bug: 330741645

Bypass-Presubmit-Reason: no sencha presubmit tests

Change-Id: Iea2122422231571eb0a477b31b47eed0cb0c18f7