MFC r307943-r307944, r308698

r307943 by andrew:
Remove the need for the delay to be zero when MULTIDELAY is undefined,
it may be useful to only enable this in some configs.

Sponsored by: ABT Systems Ltd

r307944 by andrew:
Add MULTIDELAY support to the am335x dmtimer. This will be useful for
testing Cortex-A8 support in GENERIC.

Sponsored by: ABT Systems Ltd

r308698 by loos:
After r308533, the platform compatible string must be an exact match.

Use "ti,am33xx" instead of "ti,am335x", which gives an exact match in every
DTS we support.

This fixes the boot on TI SoCs after r308533.

Suggested by: gonzo
Sponsored by: Rubicon Communications, LLC (Netgate)

MFC r306263, r306268

r306263 by andrew:
Move cpu_reset to be a platform method to allow multiple implementations.

Reviewed by: mmel
Sponsored by: ABT Systems Ltd
Differential Revision: https://reviews.freebsd.org/D8010

r306268 by andrew:
Also implement platform_cpu_reset on bcm2836

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 r306262, r306267, r310021: (needed to avoid conflicts on later merges)

Remove bus_dma_get_range and bus_dma_get_range_nb on armv6. We only need
this on a few earlier arm SoCs.

Restrict where we need to define fdt_fixup_table to just PowerPC and
Marvell.

Add the missing void to function signatures in much of the arm code.

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

Add a MULTIDELAY option to allow the ARM kernel to have multiple DELAY
implementations. Early in the boot the kernel will use an approximate,
however after the timer has been probed it will switch to a more accurate
implementation.

Reviewed by: manu
Sponsored by: ABT Systems Ltd
Differential Revision: https://reviews.freebsd.org/D5762

Move arm's devmap to some generic place, so it can be used
by other architectures.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D6091
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5

Move the Ti SoCs to use the ARM platform. This should help allowing a
single kernel to work on both PandaBoard and BeagleBone.

Add the start of the ARM platform code. This is based on the PowerPC
platform code, it is expected these will be merged in the future when the
ARM code is more complete.

Until more boards can be tested only use this with the Raspberry Pi and
rrename the functions on the other SoCs.

Reviewed by: ian@

Doh! Use C comments, not C++.

Convert static device mapping to use the new arm_devmap_add_entry(),
and add static mappings that cover most of the on-chip peripherals with
1MB section mappings. This adds about 220MB or so available kva space
by not using a hard-coded 0xF0000000 as the mapping address.

Call initarm_lastaddr() later in the init sequence, after establishing
static device mappings, rather than as the first of the initializations
that a platform can hook into. This allows a platform to allocate KVA
from the top of the address space downwards for things like static device
mapping, and return the final "last usable address" result after that and
other early init work is done.

Because some platforms were doing work in initarm_lastaddr() that needs to
be done early, add a new initarm_early_init() routine and move the early
init code to that routine on those platforms.

Rename platform_devmap_init() to initarm_devmap_init() to match all the
other init routines called from initarm() that are designed to be
implemented by platform code.

Add a comment block that explains when these routines are called and the
type of work expected to be done in each of them.

Move remaining code and data related to static device mapping into the
new devmap.[ch] files. Emphasize the MD nature of these things by using
the prefix arm_devmap_ on the function and type names (already a few of
these things found their way into MI code, hopefully it will be harder to
do by accident in the future).

Retire arm_remap_nocache() and the data and constants associated with it.

The only remaining user was the code that allocates bounce pages for armv4
busdma. It's not clear why bounce pages would need uncached memory, but
if that ever changes, kmem_alloc_attr() would be the way to get it.

Remove #include <machine/frame.h> from all the arm code that doesn't
really need it. That would be almost everywhere it was included. Add
it in a couple files that really do need it and were previously getting
it by accident via another header.

Remove all #include <machine/pmap.h> from arm code. It's already
included by vm/pmap.h, which is a prerequisite for arm/machine/pmap.h
so there's no reason to ever include it directly.

Thanks to alc@ for pointing this out.

Increase the maximum KVM available on TI chips. Not sure why we suddenly need
that much, but that lets me boot with 1GB of RAM.

Strip trailing newline.

Merge the FDT versions of initarm.

The copies of initarm used on platforms with FDT support were almost
identical. The differences were pulled out into separate functions that
were called by initarm.

This change merges the, now identical, copies of initarm and a few of it's
support functions. This is a step towards a common kernel on ARMv6.

Missing paren.

Pointy hat:me

set the kernelname from the boot loader environment.
This fixes kern.bootfile sysctl.

Submitted by: Giovanni Trematerra

Pull out the SoC specific parts of initarm into separate functions

Update different versions of physmap_init to be identical in preparation
for merging them.

Reduce the diff between the FDT implementations of initarm.
This only touches whitespace and comments.

Create a common set_stackptrs in sys/arm/machdep.c.

On single core devices set_stackptrs is only ever called with cpu = 0 in
initarm and will be identical to the existing function. On SMP this needs
to be implemented for sys/arm/mp_machdep.c, but the implementations are
identical for each SoC.

Style cleanup

Merging of projects/armv6, part 10

- Support for Texas Instruments SoCs:
- AM335x
- OMAP4

- Kernel configs, DTS for Beaglebone and Pandaboard

Submitted by: Ben Gray, Damjan Marion