Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

MFC r324185:

Enhance the interrupt capabilities of ti_pruss driver.

The existing ti_pruss driver for the PRUSS Hardware provided by the AM335x
ARM CPU has basic interrupt capabilities. This updated driver provides some
more options:

- Sysctl based configuration for the interrupts (for some examples, see the
test plan in the phabricator review cited below).

- A device file (/dev/pruss0.irqN) for each enabled interrupt. This file
can be read and the device blocks if no irq has happened or returns an
uint64_t timestamp based on nanouptime().

- Each interrupt device file provides kqueue-based event notification,
blocking read(), or select().

Submitted by: Manuel Stuhn <freebsdnewbie@freenet.de>
Differential Revision: https://reviews.freebsd.org/D11959

MFC r305492: Let knlist_add do the locking part

Remove explicit mtx_lock/mtx_unlock around knlist_add and pass 0 as
locked parameter so knlist_add does the locking itself

Suggested by: kib@

MFC r305039:

Fix TI PRUSS driver panic with INVARIANTS enabled

Value passed as islocked argument to knlist_add should
be consistent with actual lock state so add lock/unlock
calls around knlist_add

PR: 212120
Submitted by: Manuel Stuhn

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

ti_pruss: pass the correct IRQ to userland.

Also, fix several problems with the kqueue notification.

Submitted by: Manuel Stühn freebsdnewbie at freenet.de

Stop using machine/fdt.h in the arm kernel code when we don't need it.

ti_pruss: make sure the mmap'ed memory region is uncacheable.

MFC after: 1 week

Remove "#define DEBUG" that conflicts with "option DEBUG" in kernel config

Allow multiple devices to mmap. It's impossible to prevent this with
checks on the open/close functions.

MFC after: 1 week

Follow r261352 by updating all drivers which are children of simplebus
to check the status property in their probe routines.

Simplebus used to only instantiate its children whose status="okay"
but that was improper behavior, fixed in r261352. Now that it doesn't
check anymore and probes all its children; the children all have to
do the check because really only the children know how to properly
interpret their status property strings.

Right now all existing drivers only understand "okay" versus something-
that's-not-okay, so they all use the new ofw_bus_status_okay() helper.

fix args to mtx_init

Note that this commit hasn't been compile tested because these files
are not hooked up to the build...

PR: 186129
Submitted by: Takanori Sawada
Approved by: rpaulo

Add a driver for the TI Programmable Realtime Unit Subsystem.

This is only a userland accessibility driver. It mmaps the hardware region to
userland and posts interrupt notifications via kqueue.