Save CR24 and CR27 and report in ddb.

Whitespace.

The FP regs are accessed in both physical and virtual modes. Make sure
they're allocated in directly mapped memory to avoid aliasing problems
and unnecessary cache flushing.

Fix various names and r

The FP regs are accessed in both physical and virtual modes. Make sure
they're allocated in directly mapped memory to avoid aliasing problems
and unnecessary cache flushing.

Fix various names and references. If we ever directly map the uarea and
pcb we can change things at that point.

Significantly helps my J210 (PA7200).

Mostly from OpenBSD.

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Follow upstream license changes for files with Michael Shalayeff's
copyright. In most cases, this means dropping the 3rd and 4th clauses.

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

- Performance boost on some/all machines.
- Well on the way to PA2.0 (in 32bit mode) support. Several
machines probe hardware, but fail sometime after interrupts
are enabled.

Other things changed / fixed on the branch are

- update autoconf to use the OpenBSD code.
- com @ dino is very close to being supported.
- HPPA_REDZONE has been replaced with a working redzone which
is enabled with DIAGNOSTIC.
- UPAGES has been halved in size.
- power(4) from OpenBSD to fix a few bugs.
- updated list of modules from OpenBSD.
- initial ports of uturn(4), astro(4) and elroy(4).
- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

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Cast the argument to HPPA_FRAME_ROUND to uintptr_t

Typo in comment. From OpenBSD.

No need for reg.h here.

Typo. From OpenBSD.

merge ktrace-lwp.

add hppa support for RAS, context stuff, siginfo and scheduler activations:
- add a RAS hook in cpu_switch().
- fill in the definition of struct mcontext.
- implement cpu_upcall(), cpu_getmcontext

add hppa support for RAS, context stuff, siginfo and scheduler activations:
- add a RAS hook in cpu_switch().
- fill in the definition of struct mcontext.
- implement cpu_upcall(), cpu_getmcontext(), cpu_getmcontext() and
cpu_switchto().
- for now, force the right priviledge bits and space regs in setcontext().
- use correct values for __SIMPLELOCK_*.
- move the user stack to start at a multiple of the pthread stack size
so that libpthread can use the sp-masking trick.

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Added files to support generic HP PA-RISC based machines. hp700-specific
files to follow.