IRONside calls are remote procedure calls which comprise the runtime
interface of Nordic IRONside SE. They are realized using a simple IPC
mechanism.
A local domain (client) issues requests to the server by exchanging data
in shared memory, which is divided into evenly sized buffers. The client
selects a buffer, writes a request into it, and sends it to the server.
The server processes that request and writes a response into the same
buffer before returning it to the client.
This patch adds the initial client-side implementation on top of MBOX.
It features cache management and a blocking alloc/dispatch/release API
for synchronous, zero-copy transfers.
A new devicetree binding is added to support this implementation. It is
patterned after the `zephyr,ipc-*` bindings, where each node associates
a pair of mailboxes and a shared memory region.
Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>
Introduce core support for ARM's SCMI (System Control and
Management Interface). This includes:
* shared memory (SHMEM) driver. This consists of a suite
of functions used to interact with the shared memory area.
* shared memory and doorbell-based transport layer driver.
Data is passed between platform and agent via shared
memory. Signaling is done using polling (PRE_KERNEL) and
doorbells (POST_KERNEL). This makes use of Zephyr MBOX API
(for signaling purposes) and the SHMEM driver (for polling
and data transfer).
* core driver - acts as glue between transport and protocol
layers. Provides synchronized access to transport layer
channels and channel assignment/initialization.
* infrastructure for creating SCMI protocols
This is based on ARM's SCMI Platform Design Document: DEN0056E.
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
