possible to use alternate system call tables. This is usefull for
displaying correctly the arguments in Mach binaries traces.
If NULL is given, then the regular systam call table for the process is used.
Our PC keyboard driver (sys/dev/pckbc/pckbd.c) works only with 8042
keyboard controller driver (sys/dev/ic/pckbc.c). So, This file
provides same functions as those of 8042 driver.
XXX: we need cleaner interface between the keyboard driver and
keyboard controller drivers.
XXX: PS/2 mice are not supported yet.
backed by physical pages (ie. because it reused a previously-freed one),
so that we can skip a bunch of useless work in that case.
this fixes the underlying problem behind PR 18543, and also speeds up fork()
quite a bit (eg. 7% on my pc, 1% on my ultra2) when we get a cache hit.
original system call number, which can be negative for a Mach trap.
We cannot just replace code by realcode, because ktrsyscall uses it as
an index in the system call table, thus crashing the kernel when the
value is negative.
when looking to reenable caching, only do so if all the pages aren't already
cached.
Convert some ints to unsigned int. (scarily this actually shows the biggest
decrease in timing for my benchmark, I guess the compiler can optimise better)
Use pmap_free_pvs in pmap_remove, should save on the overhead of freeing
each pv on it's own.
Correctly set ptp when calling pmap_enter_pv, this adds more overhead, but
the effect is minimal. Timings show that it increases gmake's make configure
step from 2:07.90 to 2:08.90. I've more optimisations planned that should
negate this increase.
This is based upon Jason's work on xscale.
Most of the interrupt handling code is now written in C using an asm stub to
call into the C code.
spl* now only updates a software mask, and does not update the hardware,
this should be much faster.
The new code works well on cats, it's untested on netwinder, but should work.
The code implements generic soft interrupts.
More work is still required to bring the isa interrupt handling code upto
scratch currently all isa interrupts are handled at IPL_BIO on the footbridge.
This may cause isa interrupts to be handled later than they should be.
I plan to fix this in the near future.
kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals
kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)
based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe
