1 /*
2 * Copyright (c) 2020-2023 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
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25 *
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27 */
28 #include <arm/pmap/pmap_internal.h>
29 #include <arm/preemption_disable_internal.h>
30
31 /**
32 * Placeholder for random pmap functionality that doesn't fit into any of the
33 * other files. This will contain things like the CPU copy windows, ASID
34 * management and context switching code, and stage 2 pmaps (among others).
35 *
36 * My idea is that code that doesn't fit into any of the other files will live
37 * in this file until we deem it large and important enough to break into its
38 * own file.
39 */
40
41
42 void
pmap_abandon_measurement(void)43 pmap_abandon_measurement(void)
44 {
45 #if SCHED_HYGIENE_DEBUG
46 struct _preemption_disable_pcpu *pcpu = PERCPU_GET(_preemption_disable_pcpu_data);
47 uint64_t istate = pmap_interrupts_disable();
48 if (pcpu->pdp_start.pds_mach_time != 0) {
49 pcpu->pdp_abandon = true;
50 }
51 pmap_interrupts_restore(istate);
52 #endif /* SCHED_HYGIENE_DEBUG */
53 }
54