osfmk/arm64/monotonic.h

   1 /*
   2  * Copyright (c) 2017-2019 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 ARM64_MONOTONIC_H
  29 #define ARM64_MONOTONIC_H
  30
  31 #include <sys/cdefs.h>
  32
  33 #if MONOTONIC
  34
  35 #include <pexpert/arm64/board_config.h>
  36
  37 #if KERNEL_PRIVATE
  38
  39 __BEGIN_DECLS
  40
  41 #if MONOTONIC && !CPMU_AIC_PMI
  42 #define MONOTONIC_FIQ 1
  43 #endif /* MONOTONIC && !CPMU_AIC_PMI */
  44
  45 #include <stdint.h>
  46
  47 #if HAS_UNCORE_CTRS
  48 #define MT_NDEVS 2
  49 #else /* HAS_UNCORE_CTRS */
  50 #define MT_NDEVS 1
  51 #endif /* !HAS_UNCORE_CTRS */
  52
  53 #define MT_CORE_CYCLES 0
  54 #define MT_CORE_INSTRS 1
  55 #define MT_CORE_NFIXED 2
  56 #define MT_CORE_MAXVAL ((UINT64_C(1) << 48) - 1)
  57
  58 __END_DECLS
  59
  60 #endif /* KERNEL_PRIVATE */
  61
  62 #if MACH_KERNEL_PRIVATE
  63
  64 #include <stdbool.h>
  65
  66 __BEGIN_DECLS
  67
  68 /* set by hardware if a PMI was delivered */
  69 #define PMCR0_PMAI (UINT64_C(1) << 11)
  70 #define PMCR0_PMI(REG) ((REG) & PMCR0_PMAI)
  71
  72 #if HAS_UNCORE_CTRS
  73
  74 #define UPMSR_PMI(REG) ((REG) & 0x1)
  75
  76 #endif /* HAS_UNCORE_CTRS */
  77
  78 static inline bool
  79 mt_pmi_pending(uint64_t * restrict pmcr0_out,
  80     uint64_t * restrict upmsr_out)
  81 {
  82         uint64_t pmcr0 = __builtin_arm_rsr64("PMCR0_EL1");
  83         bool pmi = PMCR0_PMI(pmcr0);
  84         if (pmi) {
  85                 /*
  86                  * Acknowledge the PMI by clearing the pmai bit.
  87                  */
  88                 __builtin_arm_wsr64("PMCR0_EL1", pmcr0 & ~PMCR0_PMAI);
  89         }
  90         *pmcr0_out = pmcr0;
  91
  92 #if HAS_UNCORE_CTRS
  93         extern bool mt_uncore_enabled;
  94         if (mt_uncore_enabled) {
  95                 uint64_t upmsr = __builtin_arm_rsr64("UPMSR_EL1");
  96                 if (UPMSR_PMI(upmsr)) {
  97                         pmi = true;
  98                 }
  99                 *upmsr_out = upmsr;
 100         }
 101 #else /* HAS_UNCORE_CTRS */
 102 #pragma unused(upmsr_out)
 103 #endif /* !HAS_UNCORE_CTRS */
 104
 105         return pmi;
 106 }
 107
 108 void mt_fiq(void *cpu, uint64_t pmcr0, uint64_t upmsr);
 109
 110 #if CPMU_AIC_PMI
 111 void mt_cpmu_aic_pmi(void *source);
 112 #endif /* CPMU_AIC_PMI */
 113
 114 __END_DECLS
 115
 116 #endif /* MACH_KERNEL_PRIVATE */
 117
 118 #endif /* MONOTONIC */
 119
 120 #endif /* !defined(ARM64_MONOTONIC_H) */