int foo(struct lwp *l, void *v, register_t *retval)
to:
int foo(struct lwp *l, const struct foo_args *uap, register_t *retval)
Fixup compat code to not write into 'uap' and (in some cases) to actually
pass a correctly formatted 'uap' structure with the right name to the
next routine.
A few 'compat' routines that just call standard ones have been deleted.
All the 'compat' code compiles (along with the kernels required to test
build it).
98% done by automated scripts.
ACPI wakeup code and teach it how to start the APs again. As a side
effect the CPU_START interface allows choosing between different
bootstrap codes more easily now.
than TSC, but doesn't suffer from SpeedStep as TSC does.
The default quality is higher than HPET for UP, but -100 for
MULTIPROCESSOR as it needs CPU local state which doesn't exist yet.
- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.
- Use atomics to adjust the pmap reference count, instead of taking locks.
- Implement I386_{SET,GET}_{FS,GS}BASE, allowing %fs and %gs to be used
as per-thread registers. This is compatible with FreeBSD.
- Run patches after we have attached CPUs, since we then know if the
system is uniprocessor or not. Eliminates a lot of #ifdef MULTIPROCESSOR
and makes running MP kernels on UP systems cheaper.
- Patch out many of the 'lock' prefixes to nops if uniprocessor.
- Do a wbinvd after patching to ensure that the trace/instruction cache
is up to date.
SEMMNI, SEMMNS, SEMUME and SHMMAXPGS.
They can be tweaked via sysctl now. Ports that were setting values on
them weren't touched, I only removed the ones that were commented out.
definitely doesn't have SYS___syscall.
Kill all the code - now matching i386/i386/linux_syscall.c
There is also no point using a switch statement (and it's unpredictable
jump indirect) to save a few memory copies.
With a the result of trace_is_enabled() cached in p->p_trace_enabled the
cost of 2 correctly predicted branches is insignificant.
Reorder prologue slightly, should reduce memory stalls.
to generate syscall_plain() with #defines to remove the trace calls.
Join the club of making micro-optimisations to this code to speed up
benchmarks of empty system calls (eg getpid()):
- Use __predict_false() to get fewer branches in the 'normal' path.
- Just copy all the arguments from the stack frame to 'args', since the
jump indirect for the switch statement is basically unpredicatable.
- Keep the (rather pointless) test for 0 arguments - just for higher
benchmark scores.
NB system call timing are dominated by other factors! I measured getppid()
as faster than getpid(), sometimes open("foo", -1) was also faster.
I also suspect that if trace_is_enabled(p) were a simple bit test (that
could be inlined), then the cost of the tests would be unmeasurable and
the syscall_plain/fancy fiasco could be expunged completely.
argument. Use this and replace the inline assembly (mul + div using the
64bit intermediate result) with normal 32bit multiplication and
division. The compiler can turn the division into a multiplication and
shift, making it even cheaper then the original assembly. For extreme
long delays, just use 64bit arithmetic.
- add some comments from that
- options SPACE TAB
- enable EST
- enable DDB and build w/ frame pointer by default
- enable ACPI devices
- include AGP
- include Cardbus and PCMCIA
- include Synaptics driver
- include atw, ipw, iwi, hme, rtw, txp
- include uep, stuirda, utoppy, ugensa
This makes GENERIC actually usable for laptops.
- reduce differences between amd64 and i386. notably, share pmap.c
between them. it makes several i386 pmap improvements available to
amd64, including tlb shootdown reduction and bug fixes from Stephan Uphoff.
- implement deferred pmap switching for amd64.
- remove LARGEPAGES option. always use large pages if available.
also, make it work on amd64.
This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.
TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.
NOTES:
pmppc was removed as an arch, and moved to a evbppc target.
