7dd847523e
Add the sub-mailbox nodes that are used to communicate between MPU and various remote processors present in the AM64x SoCs for the AM642 EVM and AM642 SK boards. These include the R5F remote processors in the two dual-R5F clusters (MAIN_R5FSS0 & MAIN_R5FSS1) in the MAIN domain; and a M4 processor in the MCU safety island. These sub-mailbox nodes utilize the System Mailbox clusters 2, 4 and 6. The remaining clusters 3, 5 and 7 are currently not used, and so are disabled. Clusters 0 and 1 were never added to the dts file as they do not support interrupts towards the A53 core. The sub-mailbox nodes added match the hard-coded mailbox configuration used within the TI RTOS IPC software packages. The R5F processor sub-systems are assumed to be running in Split mode, so a sub-mailbox node is used by each of the R5F cores. Only the sub-mailbox node for the first R5F core in each cluster is used in case of a Single-CPU mode for that R5F cluster. NOTE: The cluster nodes only have the Mailbox IP interrupt outputs that are routed to the GIC_SPI. The sub-mailbox nodes' irq-id are indexing into the listed interrupts, with the usr-id using the actual interrupt output line number from the Mailbox IP. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Nishanth Menon <nm@ti.com> Reviewed-by: Gowtham Tammana <g-tammana@ti.com> Link: https://lore.kernel.org/r/20210322185430.957-4-s-anna@ti.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.