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freebsd-skq/sys/ia64/include
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John Baldwin c6a37e8413 Divorce critical sections from spinlocks. Critical sections as denoted by 
critical_enter() and critical_exit() are now solely a mechanism for
deferring kernel preemptions.  They no longer have any affect on
interrupts.  This means that standalone critical sections are now very
cheap as they are simply unlocked integer increments and decrements for the
common case.

Spin mutexes now use a separate KPI implemented in MD code: spinlock_enter()
and spinlock_exit().  This KPI is responsible for providing whatever MD
guarantees are needed to ensure that a thread holding a spin lock won't
be preempted by any other code that will try to lock the same lock.  For
now all archs continue to block interrupts in a "spinlock section" as they
did formerly in all critical sections.  Note that I've also taken this
opportunity to push a few things into MD code rather than MI.  For example,
critical_fork_exit() no longer exists.  Instead, MD code ensures that new
threads have the correct state when they are created.  Also, we no longer
try to fixup the idlethreads for APs in MI code.  Instead, each arch sets
the initial curthread and adjusts the state of the idle thread it borrows
in order to perform the initial context switch.

This change is largely a big NOP, but the cleaner separation it provides
will allow for more efficient alternative locking schemes in other parts
of the kernel (bare critical sections rather than per-CPU spin mutexes
for per-CPU data for example).

Reviewed by:	grehan, cognet, arch@, others
Tested on:	i386, alpha, sparc64, powerpc, arm, possibly more
2005-04-04 21:53:56 +00:00
..
pc Remove headers copied from i386 and either useless or wrong on ia64. 2003-11-02 09:19:07 +00:00
_inttypes.h
_limits.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
_regset.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
_stdint.h <stdint.h> should define WINT_M{AX,IN} independent from whether WCHAR_MIN is 2004-05-18 16:04:57 +00:00
_types.h netchild's mega-patch to isolate compiler dependencies into a central 2005-03-02 21:33:29 +00:00
acpica_machdep.h Move the code for halting the CPU (acpi_cpu_c1) into machdep files. 2004-10-11 05:39:15 +00:00
asm.h nit in /*- 2005-01-31 08:16:45 +00:00
atomic.h For the atomic_{add|clear|set|subtract} family of inlines, return the 2004-09-22 19:58:43 +00:00
bootinfo.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
bus_dma.h Refactor the bus_dma header files so that the interface is described in 2005-03-14 16:46:28 +00:00
bus_memio.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
bus_pio.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
bus.h Refactor the bus_dma header files so that the interface is described in 2005-03-14 16:46:28 +00:00
clock.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
clockvar.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
cpu.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
cpufunc.h netchild's mega-patch to isolate compiler dependencies into a central 2005-03-02 21:33:29 +00:00
db_machdep.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
dig64.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
efi.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
elf.h Add sysentvec->sv_fixlimits() hook so that we can catch cases on 64 bit 2003-09-25 01:10:26 +00:00
endian.h netchild's mega-patch to isolate compiler dependencies into a central 2005-03-02 21:33:29 +00:00
exec.h Use a common multi-inclusion protection, and add such a 2005-02-19 21:16:48 +00:00
float.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
floatingpoint.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
fpu.h Use primitive types to avoid creating an artificial header dependency: 2004-12-11 06:15:12 +00:00
frame.h
gdb_machdep.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
ia64_cpu.h Add an instruction group break after the move to application register 2003-08-15 05:46:33 +00:00
ieee.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
ieeefp.h Cleanup and style(9) fixes. No functional change. 2003-08-11 21:25:19 +00:00
in_cksum.h netchild's mega-patch to isolate compiler dependencies into a central 2005-03-02 21:33:29 +00:00
intr.h
intrcnt.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
kdb.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
limits.h netchild's mega-patch to isolate compiler dependencies into a central 2005-03-02 21:33:29 +00:00
mca.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
md_var.h Further enhance the handling of misaligned loads and stores: 2005-01-02 00:20:54 +00:00
memdev.h Remove extraneous ';'. 2004-08-01 18:51:44 +00:00
mutex.h
nexusvar.h
pal.h
param.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
pcb.h As I said: the previous commit was untested... Remove an #endif which 2004-08-16 19:05:08 +00:00
pci_cfgreg.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
pcpu.h Fixed a pedantic syntax error (a stray semicolon at the end of 2003-11-17 03:40:41 +00:00
pmap.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
proc.h Divorce critical sections from spinlocks. Critical sections as denoted by 2005-04-04 21:53:56 +00:00
profile.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
pte.h Remove struct ia64_itir and use a plain old uint64_t instead. 2004-11-21 21:40:08 +00:00
ptrace.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
reg.h Replace uint64_t with unsigned long in struct dbreg. 2004-03-20 05:27:14 +00:00
reloc.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
resource.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
runq.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
sal.h MFp4: 2004-09-19 03:50:46 +00:00
sapicreg.h
sapicvar.h Rewrite the SAPIC initialization to always program the RTEs with what 2003-09-10 22:49:38 +00:00
setjmp.h Avoid using __aligned(16). Instead define the jmp_buf in terms of 2003-07-26 08:03:43 +00:00
sf_buf.h MFamd64 2004-04-18 07:11:12 +00:00
sigframe.h
signal.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
smp.h
stdarg.h netchild's mega-patch to isolate compiler dependencies into a central 2005-03-02 21:33:29 +00:00
sysarch.h Provide sysarch(2) prototypes in the MD sysarch.h headers. While I'm 2004-01-09 16:52:09 +00:00
ucontext.h Simplify the contexts created by the kernel and remove the related 2003-12-07 20:47:33 +00:00
unwind.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
varargs.h Drop any and all support for varargs. There's no history to worry 2003-09-28 05:34:07 +00:00
vmparam.h /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00