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opnsense-src/sys/arm/include
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Konstantin Belousov 30d4f9e888 Add atomic_load(9) and atomic_store(9) operations. 
They provide relaxed-ordered atomic access semantic.  Due to the
FreeBSD memory model, the operations are syntaxical wrappers around
the volatile accesses.  The volatile qualifier is used to ensure that
the access not optimized out and in turn depends on the volatile
semantic as implemented by supported compilers.

The motivation for adding the operation is to help people coming from
other systems or knowing the C11/C++ standards where atomics have
special type and require use of the special access operations.  It is
still the case that FreeBSD requires plain load and stores of aligned
integer types to be atomic.

Suggested by:	jhb
Reviewed by:	alc, jhb
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D13534
2017-12-19 09:59:20 +00:00
..
_align.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
_bus.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
_inttypes.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
_limits.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
_stdint.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
_types.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
acle-compat.h From https://sourceware.org/ml/newlib/2014/msg00113.html 2014-08-14 04:20:13 +00:00
armreg.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
asm.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
asmacros.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
at91_gpio.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
atags.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
atomic-v4.h Remove register keyword from sys/ and ANSIfy prototypes 2017-05-17 00:34:34 +00:00
atomic-v6.h Correct the IT instruction in atomic_fcmpset_64(). 2017-01-29 13:31:56 +00:00
atomic.h Add atomic_load(9) and atomic_store(9) operations. 2017-12-19 09:59:20 +00:00
blockio.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
board.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
bus.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
bus_dma.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
clock.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
counter.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
cpu-v4.h All CP15 registers are bit fields or counters, don't use signed type 2017-11-05 16:52:54 +00:00
cpu-v6.h All CP15 registers are bit fields or counters, don't use signed type 2017-11-05 16:52:54 +00:00
cpu.h Include machine/acle-compat.h in cdefs.h on arm if the compiler doesn't 2016-05-25 19:44:26 +00:00
cpufunc.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
cpuinfo.h Implement tunable CPU quirks. 2017-06-13 12:07:18 +00:00
db_machdep.h Fix printing of negative offsets (typically from frame pointers) again. 2017-03-26 18:46:35 +00:00
debug_monitor.h Improve ARM debug_monitor for SMP machines 2016-05-29 17:35:38 +00:00
disassem.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
dump.h Factor out duplicated code from dumpsys() on each architecture into generic 2015-01-07 01:01:39 +00:00
efi.h Fix building on i386 and arm. But 'public domain' headers on the files 2016-10-13 06:56:23 +00:00
elf.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
endian.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
exec.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
fdt.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
fiq.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
float.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
floatingpoint.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
frame.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
gdb_machdep.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
ieee.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
ieeefp.h People porting FreeBSD to new architectures ought not have to 2011-10-21 06:41:46 +00:00
in_cksum.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
intr.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
kdb.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
limits.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
machdep.h Save VFP state in getcontext(3) on ARM. 2017-10-16 12:53:54 +00:00
md_var.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
memdev.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
metadata.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
minidump.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
ofw_machdep.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
param.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
pcb.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
pcpu.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
physmem.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
pl310.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
platform.h When the initarm_* routines were renamed to platform_* and moved to their 2014-08-17 02:56:58 +00:00
platformvar.h Add external PLATFORM access on arm, and use it in the pl310 driver. 2017-07-11 16:30:16 +00:00
pmap-v4.h Define CPU_XSCALE_CORE3 when relevant. 2017-09-19 23:41:55 +00:00
pmap-v6.h Implement tunable CPU quirks. 2017-06-13 12:07:18 +00:00
pmap.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
pmap_var.h Don't use atomic operations for page table entries and handle access 2016-04-22 06:32:27 +00:00
pmc_mdep.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
proc.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
profile.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
psl.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
pte-v4.h Rename pte.h to pte-v4.h and start including directly either pte-v4.h 2016-02-19 09:23:32 +00:00
pte-v6.h Fix TEX index acquisition using L2 attributes 2017-07-27 23:14:17 +00:00
ptrace.h Add ptrace operations to fetch and store VFP registers. 2017-09-14 15:03:43 +00:00
reg.h Cleanup structures related to VFP and/or mcontext_t. 2017-03-24 11:46:49 +00:00
reloc.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
resource.h ARM: Define PCI_RES_BUS resource for platforms having NEW_PCIB enabled. 2015-12-02 14:24:14 +00:00
runq.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
sc_machdep.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
setjmp.h Merge in changes from NetBSD: 2013-06-08 07:16:22 +00:00
sf_buf.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
sigframe.h Import FreeBSD/arm kernel bits. 2004-05-14 11:46:45 +00:00
signal.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
smp.h Rename ARM_INTRNG and MIPS_INTRNG to INTRNG. This will help with machine 2016-04-15 16:05:41 +00:00
stack.h Allow the ARM unwinder to work through modules. This will be used to add 2015-02-19 12:06:57 +00:00
stdarg.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
swi.h Start all license statements with /*- 2005-01-05 21:58:49 +00:00
sysarch.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
sysreg.h Add the virtualisation special register definitions. 2017-12-14 13:19:43 +00:00
trap.h Move the check to see if we are tracing a function with the DTrace Function 2015-12-05 09:32:36 +00:00
ucontext.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
undefined.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
utrap.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
vdso.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
vfp.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
vm.h sys/arm: further adoption of SPDX licensing ID tags. 2017-11-27 15:04:10 +00:00
vmparam.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00