Fix rump definition of cpu_number().

Add ci_onproc.

branches: 1.22.18;
Apparently not all ports define struct clockframe in cpu.h, so we cannot
provide our definition that way. Instead, generate the struct clockframe
passed to hardclock() in MD code.

emulgate clockframe

branches: 1.20.6;
Allow compile-time optimizations to curlwp. This can have a pretty
staggering impact on performance. When running sendto() in a loop,
the improvement is 200k more calls per second with an inlined __thread
curlwp as opposed to the default. In other words, it shaves off hundreds
of CPU cycles per call (~20%). Even just eliminating the x86_curlwp()
call in favor of an inline gives an improvement of 60k calls per second.

update comments

Kludges like to procreate. Add alpha cpu_frequency() kludge.

mark rump's CPU_INFO_ITERATOR as being __unused.

branches: 1.16.4;
Inform the rump kernel hypervisor of valid thread contexts so
that the implementation can allocate and release storage for them
in an optimal fashion, if necessary.

branches: 1.15.4; 1.15.14;
Update copyright statements.

no functional change.

branches: 1.14.2;
Add SMP support for all architectures.

tested on sparc64 by martin

add ci_curlwp since we use it now

branches: 1.12.4;
rump_get_curlwp() is dead

fix previous to make sense

adjust for new rump_cpu

powerpc md stuff for libkern

Assemble with _LOCORE.

My clever hack was not enough. Disable DELAY via ifndef _RUMPKERN in
subr_prf until I manage to get all archs in line with a proper MI
signature.

Sauce with some kludges:
* revert rev 1.68 of emul.c: delay() is hopelessly MD and needs
whipping (not the fun kind)
* #undef DELAY in cpu.h

This will hopefully fix build for all archs and give me time to
hop through our 46521 fine archs and edit the headers.

Apparently some ports rely on cpu.h including machine/pcb.h.

branches: 1.4.2;
Add some shameful kludges for the vax build. Eventually I'd like
to use the native kernel machine directory, so don't waste too much
effort fighting this now.

branches: 1.3.16; 1.3.20; 1.3.26;
Make it possible to run rumps multithreaded. This brings real
locking and makes it possible to run file systems which create
threads. It also makes rump file system behaviour better match
file system behaviour in the kernel.

branches: 1.2.2;
few stubs

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.8; 1.1.12; 1.1.14;
Introduce RUMPs - Runnable Userspace Meta-Programs

/sys/rump contains programs which run unmodified kernel code in an
emulated userspace environment. The kernel environment is provided
by librump. Currently supported are a number of file systems,
which by using puffs integrate seamlessly into the system and
provide a similar user experience to if the code was running as
part of the kernel. Potential future rumpification targets include
for example parts of the networking stack and some device drivers.

This work was supported by Google Summer of Code 2007.