osfmk/machine/monotonic.h

   1 /*
   2  * Copyright (c) 2017 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
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #ifndef MACHINE_MONOTONIC_H
  29 #define MACHINE_MONOTONIC_H
  30
  31 #if defined(__x86_64__)
  32 #include <x86_64/monotonic.h>
  33 #elif defined(__arm64__)
  34 #include <arm64/monotonic.h>
  35 #elif defined(__arm__)
  36 #include <arm/monotonic.h>
  37 #else
  38 #error unsupported architecture
  39 #endif
  40
  41 #include <stdatomic.h>
  42 #include <stdbool.h>
  43 #include <stdint.h>
  44
  45 extern bool mt_core_supported;
  46
  47 struct mt_cpu {
  48         uint64_t mtc_snaps[MT_CORE_NFIXED];
  49         uint64_t mtc_counts[MT_CORE_NFIXED];
  50         uint64_t mtc_counts_last[MT_CORE_NFIXED];
  51         uint64_t mtc_npmis;
  52         /*
  53          * Whether this CPU should be using PMCs.
  54          */
  55         bool mtc_active;
  56 };
  57
  58 struct mt_thread {
  59         _Atomic uint64_t mth_gen;
  60         uint64_t mth_counts[MT_CORE_NFIXED];
  61 };
  62
  63 struct mt_task {
  64         uint64_t mtk_counts[MT_CORE_NFIXED];
  65 };
  66
  67 struct mt_cpu *mt_cur_cpu(void);
  68
  69 uint64_t mt_count_pmis(void);
  70 void mt_mtc_update_fixed_counts(struct mt_cpu *mtc, uint64_t *counts,
  71     uint64_t *counts_since);
  72 uint64_t mt_mtc_update_count(struct mt_cpu *mtc, unsigned int ctr);
  73 uint64_t mt_core_snap(unsigned int ctr);
  74 void mt_core_set_snap(unsigned int ctr, uint64_t snap);
  75 void mt_mtc_set_snap(struct mt_cpu *mtc, unsigned int ctr, uint64_t snap);
  76
  77 typedef void (*mt_pmi_fn)(bool user_mode, void *ctx);
  78 extern bool mt_microstackshots;
  79 extern unsigned int mt_microstackshot_ctr;
  80 extern mt_pmi_fn mt_microstackshot_pmi_handler;
  81 extern void *mt_microstackshot_ctx;
  82 extern uint64_t mt_core_reset_values[MT_CORE_NFIXED];
  83 int mt_microstackshot_start_arch(uint64_t period);
  84
  85 #endif /* !defined(MACHINE_MONOTONIC_H) */