osfmk/chud/i386/chud_cpu_i386.c

   1 /*
   2  * Copyright (c) 2003-2007 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,
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  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
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  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <mach/mach_types.h>
  30 #include <mach/mach_host.h>
  31
  32 #include <kern/host.h>
  33 #include <kern/processor.h>
  34
  35 #include <i386/cpu_data.h>
  36 #include <i386/machine_routines.h>
  37 #include <i386/perfmon.h>
  38 #include <i386/lapic.h>
  39 #include <i386/mp.h>
  40 #include <i386/trap.h>
  41 #include <mach/i386/syscall_sw.h>
  42
  43 #include <chud/chud_xnu.h>
  44
  45 #pragma mark **** cpu enable/disable ****
  46
  47 extern kern_return_t processor_start(processor_t     processor); // osfmk/kern/processor.c
  48 extern kern_return_t processor_exit(processor_t     processor); // osfmk/kern/processor.c
  49
  50 __private_extern__
  51 kern_return_t chudxnu_enable_cpu(int cpu, boolean_t enable)
  52 {
  53     chudxnu_unbind_thread(current_thread(), 0);
  54
  55     if(cpu < 0 || (unsigned int)cpu >= real_ncpus) // sanity check
  56         return KERN_FAILURE;
  57
  58         if((cpu_data_ptr[cpu] != NULL) && cpu != master_cpu) {
  59                 processor_t processor = cpu_to_processor(cpu);
  60
  61                 if(processor == master_processor) // don't mess with the boot processor
  62                         return KERN_FAILURE;
  63
  64         if(enable) {
  65             return processor_start(processor);
  66         } else {
  67             return processor_exit(processor);
  68         }
  69     }
  70     return KERN_FAILURE;
  71 }
  72
  73 #pragma mark **** perfmon facility ****
  74
  75 __private_extern__ kern_return_t
  76 chudxnu_perfmon_acquire_facility(task_t task)
  77 {
  78     return pmc_acquire(task);
  79 }
  80
  81 __private_extern__ kern_return_t
  82 chudxnu_perfmon_release_facility(task_t task)
  83 {
  84     return pmc_release(task);
  85 }
  86
  87 #pragma mark **** interrupt counters ****
  88
  89 __private_extern__ kern_return_t
  90 chudxnu_get_cpu_interrupt_counters(int cpu, rupt_counters_t *rupts)
  91 {
  92     if(cpu < 0 || (unsigned int)cpu >= real_ncpus) { // sanity check
  93         return KERN_FAILURE;
  94     }
  95
  96     if(rupts) {
  97         boolean_t oldlevel = ml_set_interrupts_enabled(FALSE);
  98         cpu_data_t      *per_proc;
  99
 100         per_proc = cpu_data_ptr[cpu];
 101                 // For now, we'll call an NMI a 'reset' interrupt
 102         rupts->hwResets = per_proc->cpu_hwIntCnt[T_NMI];
 103         rupts->hwMachineChecks = per_proc->cpu_hwIntCnt[T_MACHINE_CHECK];
 104         rupts->hwDSIs = 0;
 105         rupts->hwISIs = 0;
 106                 // we could accumulate 0x20-0x7f, but that'd likely overflow...
 107         rupts->hwExternals = 0;
 108                 // This appears to be wrong.
 109         rupts->hwAlignments = 0; //per_proc->cpu_hwIntCnt[0x11];
 110         rupts->hwPrograms = 0;
 111         rupts->hwFloatPointUnavailable = per_proc->cpu_hwIntCnt[T_NO_FPU];
 112                 // osfmk/i386/mp.h
 113         rupts->hwDecrementers = per_proc->cpu_hwIntCnt[LAPIC_VECTOR(TIMER)];
 114                 // LAPIC_ERROR == IO ERROR??
 115         rupts->hwIOErrors = per_proc->cpu_hwIntCnt[LAPIC_VECTOR(ERROR)];
 116
 117                 // accumulate all system call types
 118                 // osfmk/mach/i386/syscall_sw.h
 119         rupts->hwSystemCalls = per_proc->cpu_hwIntCnt[UNIX_INT]  +
 120                         per_proc->cpu_hwIntCnt[MACH_INT] +
 121                         per_proc->cpu_hwIntCnt[MACHDEP_INT] +
 122                         per_proc->cpu_hwIntCnt[DIAG_INT];
 123
 124         rupts->hwTraces = per_proc->cpu_hwIntCnt[T_DEBUG]; // single steps == traces??
 125         rupts->hwFloatingPointAssists = 0;
 126                 // osfmk/i386/mp.h
 127         rupts->hwPerformanceMonitors =
 128                         per_proc->cpu_hwIntCnt[LAPIC_VECTOR(PERFCNT)];
 129         rupts->hwAltivecs = 0;
 130         rupts->hwInstBreakpoints = per_proc->cpu_hwIntCnt[T_INT3];
 131         rupts->hwSystemManagements = 0;
 132         rupts->hwAltivecAssists = 0;
 133         rupts->hwThermal = per_proc->cpu_hwIntCnt[LAPIC_VECTOR(THERMAL)];
 134         rupts->hwSoftPatches = 0;
 135         rupts->hwMaintenances = 0;
 136                 // Watchpoint == instrumentation
 137                 rupts->hwInstrumentations = per_proc->cpu_hwIntCnt[T_WATCHPOINT];
 138
 139         ml_set_interrupts_enabled(oldlevel);
 140         return KERN_SUCCESS;
 141     } else {
 142         return KERN_FAILURE;
 143     }
 144 }
 145
 146 __private_extern__ kern_return_t
 147 chudxnu_clear_cpu_interrupt_counters(int cpu)
 148 {
 149     if(cpu < 0 || (unsigned int)cpu >= real_ncpus) { // sanity check
 150         return KERN_FAILURE;
 151     }
 152         cpu_data_t      *per_proc;
 153
 154         per_proc = cpu_data_ptr[cpu];
 155
 156         bzero((char *)per_proc->cpu_hwIntCnt, sizeof(uint32_t)*256);
 157
 158     return KERN_SUCCESS;
 159 }
 160
 161 #pragma mark *** deprecated ***
 162
 163 //DEPRECATED
 164 __private_extern__ kern_return_t
 165 chudxnu_get_cpu_rupt_counters(int cpu, rupt_counters_t *rupts)
 166 {
 167         return chudxnu_get_cpu_interrupt_counters(cpu, rupts);
 168 }
 169
 170 //DEPRECATED
 171 __private_extern__ kern_return_t
 172 chudxnu_clear_cpu_rupt_counters(int cpu)
 173 {
 174         return chudxnu_clear_cpu_interrupt_counters(cpu);
 175 }