1*2c2f96dcSApple OSS Distributions /* * Copyright (c) 2020 Apple Inc. All rights reserved.
2*2c2f96dcSApple OSS Distributions *
3*2c2f96dcSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
4*2c2f96dcSApple OSS Distributions *
5*2c2f96dcSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
6*2c2f96dcSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
7*2c2f96dcSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
8*2c2f96dcSApple OSS Distributions * compliance with the License. The rights granted to you under the License
9*2c2f96dcSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
10*2c2f96dcSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
11*2c2f96dcSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
12*2c2f96dcSApple OSS Distributions * terms of an Apple operating system software license agreement.
13*2c2f96dcSApple OSS Distributions *
14*2c2f96dcSApple OSS Distributions * Please obtain a copy of the License at
15*2c2f96dcSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
16*2c2f96dcSApple OSS Distributions *
17*2c2f96dcSApple OSS Distributions * The Original Code and all software distributed under the License are
18*2c2f96dcSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
19*2c2f96dcSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
20*2c2f96dcSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
21*2c2f96dcSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
22*2c2f96dcSApple OSS Distributions * Please see the License for the specific language governing rights and
23*2c2f96dcSApple OSS Distributions * limitations under the License.
24*2c2f96dcSApple OSS Distributions *
25*2c2f96dcSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
26*2c2f96dcSApple OSS Distributions */
27*2c2f96dcSApple OSS Distributions
28*2c2f96dcSApple OSS Distributions #include <kern/assert.h>
29*2c2f96dcSApple OSS Distributions #include <kern/cpu_data.h>
30*2c2f96dcSApple OSS Distributions #include <kern/counter.h>
31*2c2f96dcSApple OSS Distributions #include <kern/zalloc.h>
32*2c2f96dcSApple OSS Distributions #include <machine/atomic.h>
33*2c2f96dcSApple OSS Distributions #include <machine/machine_routines.h>
34*2c2f96dcSApple OSS Distributions #include <machine/cpu_number.h>
35*2c2f96dcSApple OSS Distributions
36*2c2f96dcSApple OSS Distributions OS_OVERLOADABLE
37*2c2f96dcSApple OSS Distributions void
counter_add(scalable_counter_t * counter,uint64_t amount)38*2c2f96dcSApple OSS Distributions counter_add(scalable_counter_t *counter, uint64_t amount)
39*2c2f96dcSApple OSS Distributions {
40*2c2f96dcSApple OSS Distributions os_atomic_add(zpercpu_get(*counter), amount, relaxed);
41*2c2f96dcSApple OSS Distributions }
42*2c2f96dcSApple OSS Distributions
43*2c2f96dcSApple OSS Distributions OS_OVERLOADABLE
44*2c2f96dcSApple OSS Distributions void
counter_inc(scalable_counter_t * counter)45*2c2f96dcSApple OSS Distributions counter_inc(scalable_counter_t *counter)
46*2c2f96dcSApple OSS Distributions {
47*2c2f96dcSApple OSS Distributions os_atomic_inc(zpercpu_get(*counter), relaxed);
48*2c2f96dcSApple OSS Distributions }
49*2c2f96dcSApple OSS Distributions
50*2c2f96dcSApple OSS Distributions OS_OVERLOADABLE
51*2c2f96dcSApple OSS Distributions void
counter_dec(scalable_counter_t * counter)52*2c2f96dcSApple OSS Distributions counter_dec(scalable_counter_t *counter)
53*2c2f96dcSApple OSS Distributions {
54*2c2f96dcSApple OSS Distributions os_atomic_dec(zpercpu_get(*counter), relaxed);
55*2c2f96dcSApple OSS Distributions }
56*2c2f96dcSApple OSS Distributions
57*2c2f96dcSApple OSS Distributions /*
58*2c2f96dcSApple OSS Distributions * NB: On arm, the preemption disabled implementation is the same as
59*2c2f96dcSApple OSS Distributions * the normal implementation. Otherwise we would need to enforce that
60*2c2f96dcSApple OSS Distributions * callers never mix the interfaces for the same counter.
61*2c2f96dcSApple OSS Distributions */
62*2c2f96dcSApple OSS Distributions OS_OVERLOADABLE
63*2c2f96dcSApple OSS Distributions void
counter_add_preemption_disabled(scalable_counter_t * counter,uint64_t amount)64*2c2f96dcSApple OSS Distributions counter_add_preemption_disabled(scalable_counter_t *counter, uint64_t amount)
65*2c2f96dcSApple OSS Distributions {
66*2c2f96dcSApple OSS Distributions counter_add(counter, amount);
67*2c2f96dcSApple OSS Distributions }
68*2c2f96dcSApple OSS Distributions
69*2c2f96dcSApple OSS Distributions OS_OVERLOADABLE
70*2c2f96dcSApple OSS Distributions void
counter_inc_preemption_disabled(scalable_counter_t * counter)71*2c2f96dcSApple OSS Distributions counter_inc_preemption_disabled(scalable_counter_t *counter)
72*2c2f96dcSApple OSS Distributions {
73*2c2f96dcSApple OSS Distributions counter_inc(counter);
74*2c2f96dcSApple OSS Distributions }
75*2c2f96dcSApple OSS Distributions
76*2c2f96dcSApple OSS Distributions OS_OVERLOADABLE
77*2c2f96dcSApple OSS Distributions void
counter_dec_preemption_disabled(scalable_counter_t * counter)78*2c2f96dcSApple OSS Distributions counter_dec_preemption_disabled(scalable_counter_t *counter)
79*2c2f96dcSApple OSS Distributions {
80*2c2f96dcSApple OSS Distributions counter_dec(counter);
81*2c2f96dcSApple OSS Distributions }
82