sys: Remove $FreeBSD$: one-line .h pattern

Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/

Add CFI start/end proc directives to arm64, i386, and ppc

Follow-up to r353959 and r368070: do the same for other architectures.

arm32 already seems to use its own .fnstart/.fnend directives, which

Add CFI start/end proc directives to arm64, i386, and ppc

Follow-up to r353959 and r368070: do the same for other architectures.

arm32 already seems to use its own .fnstart/.fnend directives, which
appear to be ARM-specific variants of the same thing. Likewise, MIPS
uses .frame directives.

Reviewed by: arichardson
Differential Revision: https://reviews.freebsd.org/D27387

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[PowerPC64LE] Fix AP spinup on powernv.

OPAL unconditionally enters secondary CPUs with only HV and SF set.

I tried writing a secondary entry point instead, but OPAL rejected it
and I am unsure why

[PowerPC64LE] Fix AP spinup on powernv.

OPAL unconditionally enters secondary CPUs with only HV and SF set.

I tried writing a secondary entry point instead, but OPAL rejected it
and I am unsure why, so I resorted to making the system reset interrupt
endian-flexible.

This means we take a slight performance hit on wakeup on LE, but it is
a good stopgap until we can figure out a reliable way to make OPAL enter
where we want it to.

It probably makes sense to have it around anyway, because I can imagine
scenarios where the cpu resets itself to BE and does a software reset.

Sponsored by: Tag1 Consulting, Inc.

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[PowerPC64LE] Add LOAD_LR_NIA and RETURN_TO_NATIVE_ENDIAN defines.

* Add LOAD_LR_NIA define. This is preferred to "bl 1f; 1:" because it
doesn't pollute the branch predictor.

* Add magic sequence t

[PowerPC64LE] Add LOAD_LR_NIA and RETURN_TO_NATIVE_ENDIAN defines.

* Add LOAD_LR_NIA define. This is preferred to "bl 1f; 1:" because it
doesn't pollute the branch predictor.

* Add magic sequence to return the CPU to the correct endianness after
jumping to cross-endian code, similar to the sequence from Linux.

Sponsored by: Tag1 Consulting, Inc.

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powerpc: Use IFUNCs for copyin/copyout/etc

Summary:
Radix on AIM, and all of Book-E (currently), can do direct addressing of
user space, instead of needing to map user addresses into kernel space.
T

powerpc: Use IFUNCs for copyin/copyout/etc

Summary:
Radix on AIM, and all of Book-E (currently), can do direct addressing of
user space, instead of needing to map user addresses into kernel space.
Take advantage of this to optimize the copy(9) functions for this
behavior, and avoid effectively NOP translations.

Test Plan: Tested on powerpcspe, powerpc64/booke, powerpc64/AIM

Reviewed by: bdragon
Differential Revision: https://reviews.freebsd.org/D25129

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Merge ^/head r325999 through r326131.

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

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Introduce 64-bit PowerPC Book-E support

Extend the Book-E pmap to support 64-bit operation. Much of this was taken from
Juniper's Junos FreeBSD port. It uses a 3-level page table (page directory
l

Introduce 64-bit PowerPC Book-E support

Extend the Book-E pmap to support 64-bit operation. Much of this was taken from
Juniper's Junos FreeBSD port. It uses a 3-level page table (page directory
list -- PP2D, page directory, page table), but has gaps in the page directory
list where regions will repeat, due to the design of the PP2D hash (a 20-bit gap
between the two parts of the index). In practice this may not be a problem
given the expanded address space. However, an alternative to this would be to
use a 4-level page table, like Linux, and possibly reduce the available address
space; Linux appears to use a 46-bit address space. Alternatively, a cache of
page directory pointers could be used to keep the overall design as-is, but
remove the gaps in the address space.

This includes a new kernel config for 64-bit QorIQ SoCs, based on MPC85XX, with
the following notes:
* The DPAA driver has not yet been ported to 64-bit so is not included in the
kernel config.
* This has been tested on the AmigaOne X5000, using a MD_ROOT compiled in
(total size kernel+mdroot must be under 64MB).
* This can run both 32-bit and 64-bit processes, and has even been tested to run
a 32-bit init with 64-bit children.

Many thanks to stevek and marcel for getting Juniper's FreeBSD patches open
sourced to be used here, and to stevek for reviewing, and providing some
historical contexts on quirks of the code.

Reviewed by: stevek
Obtained from: Juniper (in part)
MFC after: 2 months
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D9433

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Merge ^/head r311812 through r311939.

Force all TOC references in asm to include '@toc'

This reportedly fixes one problem with booting a clang kernel.

PR: kern/215819
Submitted by: Mark Millard <markmi AT dsl-only.net>
MFC after: 2 we

Force all TOC references in asm to include '@toc'

This reportedly fixes one problem with booting a clang kernel.

PR: kern/215819
Submitted by: Mark Millard <markmi AT dsl-only.net>
MFC after: 2 weeks

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MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

Catch up with head, mostly to merge r291665 with the changes in this branch.

Provide support for ELFv2 userland if using a newer compiler (recent clang
or gcc) and binutils >= 2.24. Not enabled by default.

Catch up with head.

Make ELFv2 powerpc64 kernels build and run. Loader support will come in a
separate commit.

Catch up with head.

Provide support for userland binaries using the new ELFv2 ABI. This is a
new, simplified, ELF ABI that avoids some of the stranger aspects of the
existing 64-bit PowerPC ABI (function descriptors, in

Provide support for userland binaries using the new ELFv2 ABI. This is a
new, simplified, ELF ABI that avoids some of the stranger aspects of the
existing 64-bit PowerPC ABI (function descriptors, in particular). Actually
generating such executables requires a new version of binutils and a newer
compiler (either GCC or clang) than GCC 4.2.1.

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Merge sync of head

Merge ^/head r277327 through r277718.

MFhead @ r277403

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Use TOC to look up all kernel globals on powerpc64 instead of doing the
non-relocatable lis @ha, ori @l dance and hoping they are below 4 GB.

MFC after: 2 months

MFHead @ r275232

r274961 through r275075

Revert r274772: it is not valid on MIPS

Reported by: sbruno