14 Commits

Author SHA1 Message Date
jhb
89caa56972 Add a new atomic_fetchadd() primitive that atomically adds a value to a
variable and returns the previous value of the variable.

Tested on:	i386, alpha, sparc64, arm (cognet)
Reviewed by:	arch@
Submitted by:	cognet (arm)
MFC after:	1 week
2005-09-27 17:39:11 +00:00
jhb
b729e912ca Stop using the '+' constraint modifier with inline assembly. The '+'
constraint is actually only allowed for register operands.  Instead, use
separate input and output memory constraints.

Education from:	alc
Reviewed by:	alc
Tested on:	i386, alpha
MFC after:	1 week
2005-09-15 19:31:22 +00:00
jhb
c7383aebd6 Convert the atomic_ptr() operations over to operating on uintptr_t
variables rather than void * variables.  This makes it easier and simpler
to get asm constraints and volatile keywords correct.

MFC after:	3 days
Tested on:	i386, alpha, sparc64
Compiled on:	ia64, powerpc, amd64
Kernel toolchain busted on:	arm
2005-07-15 18:17:59 +00:00
joerg
c85a3e95f7 netchild's mega-patch to isolate compiler dependencies into a central
place.

This moves the dependency on GCC's and other compiler's features into
the central sys/cdefs.h file, while the individual source files can
then refer to #ifdef __COMPILER_FEATURE_FOO where they by now used to
refer to #if __GNUC__ > 3.1415 && __BARC__ <= 42.

By now, GCC and ICC (the Intel compiler) have been actively tested on
IA32 platforms by netchild.  Extension to other compilers is supposed
to be possible, of course.

Submitted by:	netchild
Reviewed by:	various developers on arch@, some time ago
2005-03-02 21:33:29 +00:00
grehan
5a22708ed6 - change all u_int_XX to uint_XX
- cast param for atomic_subtract_long, since Netgraph uses it.
2005-02-01 11:17:24 +00:00
grehan
75726c8985 Fix bugs with operand ordering and unnecessary sync/eieio ops. Mostly
obtained from Alpha atomic.h

Approved by:  Benno
2003-01-18 11:28:36 +00:00
grehan
4e75b6dbdf Fixed branch labels
Approved by: benno
2002-09-19 04:39:59 +00:00
benno
d4d68be2fe Make atomic_cmpset_32 correctly return 0 on failure. 2002-02-24 23:31:49 +00:00
benno
a304a71cd2 Fix the atomic_*_32 operations. These were written before I had the ability
to test them properly and before I had a working knowledge of GCC asm
constraints.
2001-06-27 12:17:23 +00:00
benno
cbd5efc8f5 Don't initialise ret in atomic_cmpset_32.
Add more synchronisation.
2001-06-26 13:54:17 +00:00
benno
b55c34215e Fix asm constraints for atomic_cmpset_32. This fix may also be needed
elsewhere.
2001-06-24 06:36:28 +00:00
benno
f371c393d1 This commit (along with one pending in sys/dev/ofw and one in sys/conf) give
us our first minimal glimpse of PowerPC support.

With this code we can get to the "mountroot>" prompt on my Apple iMac.  We
can't get any further due to lack of clock and interrupt handling, among other
things.  This does however mean that pmap and VM are initialising.

We're fairly dependant on OpenFirmware at this point, but I hope to add
support for other classes of firmware at a later stage.

Reviewed by:	obrien, dfr
2001-06-16 07:14:07 +00:00
benno
2031489c0d PowerPC atomic operation functions.
Some of these are dependant on an inline function (powerpc_mb()) that is
yet to come.

Reviewed by:	obrien
2001-01-07 03:46:01 +00:00
obrien
20531f4651 Shells for the atomic operations FreeBSD needs.
This is just waiting for a budding PowerPC ASM guy to fill in the blanks.
2001-01-01 23:06:59 +00:00