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14dd14fc00
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11 Commits

Author SHA1 Message Date
Olivier Houchard
14dd14fc00 Use strexeq instead of needlessly branch. 
Suggested by:	ian
 2017-01-28 17:46:04 +00:00
Olivier Houchard
dc5f9fcdae Implement atomic_fcmpset_* for arm and arm64. 2017-01-28 16:24:06 +00:00
Michal Meloun
fe8151a0e3 ARM: Add mising early clobber modifier in atomic_swap_32(). 
MFC after: 2 weeks
 2016-10-04 09:59:37 +00:00
Michal Meloun
6542d1a4e7 ARM: Add atomic_swap_64(). It's need by linuxkpi and drm-next-4.7. 
MFC after: 2 weeks
 2016-10-04 09:51:54 +00:00
Michal Meloun
1eb1d41a56 ARM: Implement atomic_swap_int(9). It's used in DRM2 code. 
Approved by:	kib (mentor)
 2015-11-28 12:12:28 +00:00
Konstantin Belousov
081432a88f Implement atomic_testandset_{32,int,long,64} for ARMv6. Only 
little-endian configuration for 64-bit variant is supported.

Reviewed by:	mmel
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D4113
 2015-11-10 12:15:13 +00:00
Konstantin Belousov
c39e422eed FreeBSD does not support SMP on ARMv5. Since processor is always 
self-consistent, there is no need in anything but compiler barrier in
the implementation of atomic_thread_fence_*() on ARMv5.  Split
implementation of fences for ARMv4/5 and ARMv6; the former use
compiler barriers, the later also perform hardware barriers.

An issue which is fixed by the change is the faults from the CP15
coprocessor accesses in the user mode.  This was uncovered by the
pthread_once() changes in r287556.

Reported by:	Mattia Rossi <mattia.rossi.mailinglists@gmail.com>
Discussed with:	alc, cognet, jhb
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
 2015-10-02 13:21:08 +00:00
Andrew Turner
70888b7ed5 Fix atomic_store_64, it should write the value passed in, not the value 
read by the load.

Pointy Hat:	andrew
 2015-07-19 16:55:47 +00:00
Andrew Turner
a612bbfa12 Clean up the style of the armv6 atomic code. 
Sponsored by:	ABT Systems Ltd
 2015-07-19 15:44:51 +00:00
Andrew Turner
d6a2102846 Sort the ARM atomic functions to be in alphabetical order. 
Sponsored by:	ABT Systems Ltd
 2015-07-19 13:10:47 +00:00
Andrew Turner
8fa2222f46 Split out the arm and armv6 parts of atomic.h to new files. While here use 
__ARM_ARCH to determine which revision of the architecture is applicable.

Sponsored by:	ABT Systems Ltd
 2015-07-16 13:33:03 +00:00