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