Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

MFC r269390: Fix unwind info in hand-written asm (avoid nested functions).

MFC r256691, r256748: casuword fixes

Use unsigned compare against KERNBASE addr.
Use atomic ops on armv6.

MFC 262952, 262958, 262966, 262979, 262980, 262986, 262987, 262995, 262997,
263030, 263033, 263034, 263056, 263057,

Remove all the redundant external declarations of exception vectors and
runtime setting of the pointers that's scattered around various places.

Remove all traces of support for ARM chips prior to the arm9 series.

Make the default exception handler vectors point to where I thought they
were already pointing: the default handlers (not a panic that says there
is no default handler).

Eliminate irq_dispatch.S. Move the data items it contained into
arm/intr.c and the functionality it provided into arm/exception.S.

Move the exception vector table (so-called "page0" data) into exception.S
and eliminate vectors.S.

Change the way the asm GET_CURTHREAD_PTR() macro is defined so that code
using it doesn't have to have an "AST_LOCALS" macro somewhere in the file.

Arrange for arm fork_trampoline() to return to userland via the standard
swi_exit code in exception.S instead of having its own inline expansion
of the DO_AST and PULLFRAME macros.

Now that the PUSHFRAME and PULLFRAME macros are used only in the swi
entry/exit code, they don't need to be macros. Except that didn't work
and the whole change was reverted.

Remove some unnecessary indirection and jump right to the handler functions.

Use panic rather than printf to "handle" an arm26 address exception
(should never happen on arm32).

Remove the unreferenced DATA() macro.

Remove #include <machine/asmacros.h> from files that don't need it.

MFC r261414, r261415, r261417, r261418, r261419

Don't call device_set_ivars() for the mmchs

Change the way pcpu and curthread are stored per-core

Invalidate cachelines for bounce pages on PREREAD too, there may still be
stale entries from a previous transfer.

Only use the CPU ID register if SMP is defined. Some non-MPCore armv6 cpu,
such as the one found in the RPi, don't have it, and just hang when we try
to access it.

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Add an END macro to ARM. This is mostly used to tell gas where the bounds
of the functions are when creating the EABI unwind tables.

Merging projects/armv6, part 1

Cummulative patch of changes that are not vendor-specific:
- ARMv6 and ARMv7 architecture support
- ARM SMP support
- VFP/Neon support
- ARM Generic Interrupt Controller driver
- Simplification of startup code for all platforms

o Add keyword volatile for user mutex owner field.
o Fix type consistent problem by using type long for old
umtx and wait channel.
o Rename casuptr to casuword.

Use ENTRY_NP for alternate entry points instead of ENTRY to avoid calling
mcount twice when profiling.

Spotted out by: bde

Use ENTRY instead of ALTENTRY, it doesn't exist on arm.

Implement casuword32, compare and set user integer, thank Marcel Moolenarr
who wrote the IA64 version of casuword32.

Don't use fusufault in casuptr(), as it assumes the current PCB will be
stored in r2, which can't be easily done with casuptr(). Introduce
casuptrfault instead.

Make sure casuptr() reset pcb->pcb_onfault when returning.

Start all license statements with /*-

Use the RET macro.

Implement casuptr.

Calling fuword from fuword32 with bl and without returning after is really a bad
idea.
Any way I get a customized CVS template with "Pointy hat to: cognet"
pre-filled ?

Import FreeBSD/arm kernel bits.
It only supports sa1110 (on simics) right now, but xscale support should come
soon.
Some of the initial work has been provided by :
Stephane Potvin <sepotvin at videotron.ca>
Most of this comes from NetBSD.