sys: Remove $FreeBSD$: one-line .c comment pattern

Remove /^/[*/]\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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Merge ^/head r303250 through r304235.

MFhead @ r304061

Add a kdb show command to print arbitrary SPRs on PowerPC

Summary:
There is often a need at the debugger to print arbitrary special
purpose registers (SPRs) on PowerPC. Using a rewritable asm stub,

Add a kdb show command to print arbitrary SPRs on PowerPC

Summary:
There is often a need at the debugger to print arbitrary special
purpose registers (SPRs) on PowerPC. Using a rewritable asm stub, print any SPR
provided on the command line.

Note, as there is no checking in this, attempting to print a nonexistent SPR
may cause a Program exception (illegal instruction, or boundedly undefined).

Note also that this relies on the kernel text pages being writable. If in the
future this is made not the case, this will need to be reworked.

Test Plan:
Printing the Processor Version Register (PVR, SPR 287):

db> show spr 11f
SPR 287(11f): 80240012

Differential Revision: https://reviews.freebsd.org/D7403

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Merge svn+ssh://svn.freebsd.org/base/head@211344

MFppc64:

Kernel sources for 64-bit PowerPC, along with build-system changes to keep
32-bit kernels compiling (build system changes for 64-bit kernels are
coming later). Existing 32-bit PowerPC kerne

MFppc64:

Kernel sources for 64-bit PowerPC, along with build-system changes to keep
32-bit kernels compiling (build system changes for 64-bit kernels are
coming later). Existing 32-bit PowerPC kernel configurations must be
updated after this change to specify their architecture.

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Merge from head up to r188941 (last revision before the USB stack switch)

MFH @ 186335

Modularize the Open Firmware client interface to allow run-time switching
of OFW access semantics, in order to allow future support for real-mode
OF access and flattened device frees. OF client inter

Modularize the Open Firmware client interface to allow run-time switching
of OFW access semantics, in order to allow future support for real-mode
OF access and flattened device frees. OF client interface modules are
implemented using KOBJ, in a similar way to the PPC PMAP modules.

Because we need Open Firmware to be available before mutexes can be used on
sparc64, changes are also included to allow KOBJ to be used very early in
the boot process by only using the mutex once we know it has been initialized.

Reviewed by: marius, grehan

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integrate from head@185615

Add support for kernel profiling for both AIM and BookE.

Obtained from: Juniper Networks, Inc (BookE support).

MFp4: SMP support

Make sure tmpstk is aligned and make it 8KB in size -- not 8KB+16.

Allocate a stack (with optional guard pages) for thread0 and
switch to it before calling mi_startup().

For AIM, have cpu_idle() set MSR_POW when the powerpc_pow_enabled
variable is set. On my Mac Mini this puts the CPU in NAP mode when
the kernel is idle and, any technical or environmental reasons
asi

For AIM, have cpu_idle() set MSR_POW when the powerpc_pow_enabled
variable is set. On my Mac Mini this puts the CPU in NAP mode when
the kernel is idle and, any technical or environmental reasons
aside, avoids that I have to listen to the fan all day :-)

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Avoid hardcoding the kernel link address in the linker script.
Use KERNBASE instead. While here, move the text sections
forward to the beginning of the text segment.

Forced commit to record that this file was repocopied from
src/sys/powerpc/powerpc and modified for its new location.

Copy SPRG0-3 registers at boot-time and restore when calling into
OpenFirmware. FreeBSD/ppc uses SPRG0 as the per-cpu data area pointer,
and SPRG1-3 as temporary registers during exception handling.

Copy SPRG0-3 registers at boot-time and restore when calling into
OpenFirmware. FreeBSD/ppc uses SPRG0 as the per-cpu data area pointer,
and SPRG1-3 as temporary registers during exception handling. There
have been a few instances where OpenFirmware does require these to
be part of it's context, such as cd-booting an eMac.

reported by: many
MFC after: 3 days

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/* -> /*- for license, minor formatting changes

Instead of "OpenFirmware", "openfirmware", etc. use the official spelling
"Open Firmware" from IEEE 1275 and OpenFirmware.org (no pun intended).

Ok'ed by: tmm

Bring KDB stack size into line with thread stack size (4 pages).

No need for ddb option. Never a need for ipkdb option.

Interrupt statistics, vmstat -i now works.

Submitted by: Suleiman Souhlal <refugee@segfaulted.com>
Slightly modified by: grehan
Derived from: i386

- Add definition for GET_CPUINFO, required by new trap_subr code
- garbage-collect unused defs