Update sonata-software to use the latest upstream cheriot-rtos
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DO NOT MERGE WITH THIS COMMIT AS IS; THIS POINTS CHERIOT-RTOS TO COMMITS ONY A LOCAL BRANCH ON MY FORK. WAIT FOR THE CHANGES TO BE PUSHED ONTO THE OUR LOCAL CHERIOT-RTOS FORK. This commit bumps the version of CHERIoT RTOS being used to the head of the updated `sonata` branch on our local RTOS fork, which pulls in the latest commits and driver updates from upstream `cheriot-rtos` whilst also still featuring our few remaining local changes yet to be upstreamed.
The upstream PWM driver was updated to better compartmentalise and isolate individual PWM capabilities. This PR updates the demo/example/drivers living in `sonata-software` to make use of the updated PWM driver interface.
Sonata's Pinmux driver has been updated to give it more granaular capabilites, such that capabilities to individual pin sinks and block sinks can be created and distributed, for better compartmentalisation and isolation of software that uses pinmux. This commit updates `sonata-software` to use the updated driver. Currently, the only thing using Pinmux in the software repo is the IO guide, and so this is updated to reflect the new software interface for this driver.
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DO NOT MERGE THIS PR. It currently points CHERIoT RTOS onto a local branch, which is just the
sonatabranch rebased on top of the latest upstreamcheriot-platform/cheriot-rtos:mainwith a few minor changes to our local updates to match the current upstreaming efforts. This PR will be ready for review and can be merged when this branch has been written to our localsonatabranch on thelowrisc/cheriot-rtosfork, and the first commit has been changed to point to that version.Updates
sonata-softwareto use the latest upstream RTOS changes, including general RTOS improvements as well as updated drivers (e.g. PWM and Pinmux) which offer more fine-grained compartmentalisation and isolation of MMIO capabilities, for developing software that is more secure. This requires some minimal changes to the example code and documentation that lives inside this repository.This has been tested to work with the existing demos/examples on the 1.0 bitstream.