osfmk/chud/i386/chud_cpu_i386.c

   1 /*
   2  * Copyright (c) 2003-2009 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/lapic.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 #if 0
  45 #pragma mark **** cpu enable/disable ****
  46 #endif
  47
  48 extern kern_return_t processor_start(processor_t     processor); // osfmk/kern/processor.c
  49 extern kern_return_t processor_exit(processor_t     processor); // osfmk/kern/processor.c
  50
  51 __private_extern__
  52 kern_return_t chudxnu_enable_cpu(int cpu, boolean_t enable)
  53 {
  54     chudxnu_unbind_thread(current_thread(), 0);
  55
  56     if(cpu < 0 || (unsigned int)cpu >= real_ncpus) // sanity check
  57         return KERN_FAILURE;
  58
  59         if((cpu_data_ptr[cpu] != NULL) && cpu != master_cpu) {
  60                 processor_t processor = cpu_to_processor(cpu);
  61
  62                 if(processor == master_processor) // don't mess with the boot processor
  63                         return KERN_FAILURE;
  64
  65         if(enable) {
  66             return processor_start(processor);
  67         } else {
  68             return processor_exit(processor);
  69         }
  70     }
  71     return KERN_FAILURE;
  72 }
  73
  74 #if 0
  75 #pragma mark **** perfmon facility ****
  76 #endif
  77
  78 __private_extern__ kern_return_t
  79 chudxnu_perfmon_acquire_facility(task_t task __unused)
  80 {
  81     return KERN_SUCCESS;
  82 }
  83
  84 __private_extern__ kern_return_t
  85 chudxnu_perfmon_release_facility(task_t task __unused)
  86 {
  87     return KERN_SUCCESS;
  88 }
  89
  90 #if 0
  91 #pragma mark **** interrupt counters ****
  92 #endif
  93
  94 __private_extern__ kern_return_t
  95 chudxnu_get_cpu_interrupt_counters(int cpu, interrupt_counters_t *rupts)
  96 {
  97     if(cpu < 0 || (unsigned int)cpu >= real_ncpus) { // sanity check
  98         return KERN_FAILURE;
  99     }
 100
 101     if(rupts) {
 102         boolean_t oldlevel = ml_set_interrupts_enabled(FALSE);
 103         cpu_data_t      *per_proc;
 104
 105         per_proc = cpu_data_ptr[cpu];
 106                 // For now, we'll call an NMI a 'reset' interrupt
 107         rupts->hwResets = per_proc->cpu_hwIntCnt[T_NMI];
 108         rupts->hwMachineChecks = per_proc->cpu_hwIntCnt[T_MACHINE_CHECK];
 109         rupts->hwDSIs = 0;
 110         rupts->hwISIs = 0;
 111                 // we could accumulate 0x20-0x7f, but that'd likely overflow...
 112         rupts->hwExternals = 0;
 113                 // This appears to be wrong.
 114         rupts->hwAlignments = 0; //per_proc->cpu_hwIntCnt[0x11];
 115         rupts->hwPrograms = 0;
 116         rupts->hwFloatPointUnavailable = per_proc->cpu_hwIntCnt[T_NO_FPU];
 117                 // osfmk/i386/mp.h
 118         rupts->hwDecrementers = per_proc->cpu_hwIntCnt[LAPIC_VECTOR(TIMER)];
 119                 // LAPIC_ERROR == IO ERROR??
 120         rupts->hwIOErrors = per_proc->cpu_hwIntCnt[LAPIC_VECTOR(ERROR)];
 121
 122                 // accumulate all system call types
 123                 // osfmk/mach/i386/syscall_sw.h
 124         rupts->hwSystemCalls = per_proc->cpu_hwIntCnt[UNIX_INT]  +
 125                         per_proc->cpu_hwIntCnt[MACH_INT] +
 126                         per_proc->cpu_hwIntCnt[MACHDEP_INT] +
 127                         per_proc->cpu_hwIntCnt[DIAG_INT];
 128
 129         rupts->hwTraces = per_proc->cpu_hwIntCnt[T_DEBUG]; // single steps == traces??
 130         rupts->hwFloatingPointAssists = 0;
 131                 // osfmk/i386/mp.h
 132         rupts->hwPerformanceMonitors =
 133                         per_proc->cpu_hwIntCnt[LAPIC_VECTOR(PERFCNT)];
 134         rupts->hwAltivecs = 0;
 135         rupts->hwInstBreakpoints = per_proc->cpu_hwIntCnt[T_INT3];
 136         rupts->hwSystemManagements = 0;
 137         rupts->hwAltivecAssists = 0;
 138         rupts->hwThermal = per_proc->cpu_hwIntCnt[LAPIC_VECTOR(THERMAL)];
 139         rupts->hwSoftPatches = 0;
 140         rupts->hwMaintenances = 0;
 141                 // Watchpoint == instrumentation
 142                 rupts->hwInstrumentations = per_proc->cpu_hwIntCnt[T_WATCHPOINT];
 143
 144         ml_set_interrupts_enabled(oldlevel);
 145         return KERN_SUCCESS;
 146     } else {
 147         return KERN_FAILURE;
 148     }
 149 }
 150
 151 __private_extern__ kern_return_t
 152 chudxnu_clear_cpu_interrupt_counters(int cpu)
 153 {
 154     if(cpu < 0 || (unsigned int)cpu >= real_ncpus) { // sanity check
 155         return KERN_FAILURE;
 156     }
 157         cpu_data_t      *per_proc;
 158
 159         per_proc = cpu_data_ptr[cpu];
 160
 161         bzero((char *)per_proc->cpu_hwIntCnt, sizeof(uint32_t)*256);
 162
 163     return KERN_SUCCESS;
 164 }
 165