osfmk/i386/cpu.c

   1 /*
   2  * Copyright (c) 2000-2009 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,
  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 /*
  29  *      File:   i386/cpu.c
  30  *
  31  *      cpu specific routines
  32  */
  33
  34 #include <kern/kalloc.h>
  35 #include <kern/misc_protos.h>
  36 #include <kern/machine.h>
  37 #include <mach/processor_info.h>
  38 #include <i386/pmap.h>
  39 #include <i386/machine_cpu.h>
  40 #include <i386/machine_routines.h>
  41 #include <i386/misc_protos.h>
  42 #include <i386/cpu_threads.h>
  43 #include <i386/rtclock_protos.h>
  44 #include <i386/cpuid.h>
  45 #if CONFIG_VMX
  46 #include <i386/vmx/vmx_cpu.h>
  47 #endif
  48 #include <vm/vm_kern.h>
  49 #include <kern/etimer.h>
  50 #include <kern/timer_call.h>
  51
  52 struct processor        processor_master;
  53
  54 /*ARGSUSED*/
  55 kern_return_t
  56 cpu_control(
  57         int                     slot_num,
  58         processor_info_t        info,
  59         unsigned int            count)
  60 {
  61         printf("cpu_control(%d,%p,%d) not implemented\n",
  62                 slot_num, info, count);
  63         return (KERN_FAILURE);
  64 }
  65
  66 /*ARGSUSED*/
  67 kern_return_t
  68 cpu_info_count(
  69         __unused processor_flavor_t      flavor,
  70         unsigned int                    *count)
  71 {
  72         *count = 0;
  73         return (KERN_FAILURE);
  74 }
  75
  76 /*ARGSUSED*/
  77 kern_return_t
  78 cpu_info(
  79         processor_flavor_t      flavor,
  80         int                     slot_num,
  81         processor_info_t        info,
  82         unsigned int            *count)
  83 {
  84         printf("cpu_info(%d,%d,%p,%p) not implemented\n",
  85                 flavor, slot_num, info, count);
  86         return (KERN_FAILURE);
  87 }
  88
  89 void
  90 cpu_sleep(void)
  91 {
  92         cpu_data_t      *cdp = current_cpu_datap();
  93
  94         i386_deactivate_cpu();
  95
  96         PE_cpu_machine_quiesce(cdp->cpu_id);
  97
  98         cpu_thread_halt();
  99 }
 100
 101 void
 102 cpu_init(void)
 103 {
 104         cpu_data_t      *cdp = current_cpu_datap();
 105
 106         timer_call_initialize_queue(&cdp->rtclock_timer.queue);
 107         cdp->rtclock_timer.deadline = EndOfAllTime;
 108
 109         cdp->cpu_type = cpuid_cputype();
 110         cdp->cpu_subtype = cpuid_cpusubtype();
 111
 112         i386_activate_cpu();
 113 }
 114
 115 kern_return_t
 116 cpu_start(
 117         int cpu)
 118 {
 119         kern_return_t           ret;
 120
 121         if (cpu == cpu_number()) {
 122                 cpu_machine_init();
 123                 return KERN_SUCCESS;
 124         }
 125
 126         /*
 127          * Try to bring the CPU back online without a reset.
 128          * If the fast restart doesn't succeed, fall back to
 129          * the slow way.
 130          */
 131         ret = intel_startCPU_fast(cpu);
 132         if (ret != KERN_SUCCESS) {
 133                 /*
 134                  * Should call out through PE.
 135                  * But take the shortcut here.
 136                  */
 137                 ret = intel_startCPU(cpu);
 138         }
 139
 140         if (ret != KERN_SUCCESS)
 141                 kprintf("cpu: cpu_start(%d) returning failure!\n", cpu);
 142
 143         return(ret);
 144 }
 145
 146 void
 147 cpu_exit_wait(
 148         int cpu)
 149 {
 150         cpu_data_t      *cdp = cpu_datap(cpu);
 151
 152         /*
 153          * Wait until the CPU indicates that it has stopped.
 154          */
 155         simple_lock(&x86_topo_lock);
 156         while ((cdp->lcpu.state != LCPU_HALT)
 157                && (cdp->lcpu.state != LCPU_OFF)
 158                && !cdp->lcpu.stopped) {
 159             simple_unlock(&x86_topo_lock);
 160             cpu_pause();
 161             simple_lock(&x86_topo_lock);
 162         }
 163         simple_unlock(&x86_topo_lock);
 164 }
 165
 166 void
 167 cpu_machine_init(
 168         void)
 169 {
 170         cpu_data_t      *cdp = current_cpu_datap();
 171
 172         PE_cpu_machine_init(cdp->cpu_id, !cdp->cpu_boot_complete);
 173         cdp->cpu_boot_complete = TRUE;
 174         cdp->cpu_running = TRUE;
 175         ml_init_interrupt();
 176
 177 #if CONFIG_VMX
 178         /* for every CPU, get the VT specs */
 179         vmx_get_specs();
 180 #endif
 181 }
 182
 183 processor_t
 184 cpu_processor_alloc(boolean_t is_boot_cpu)
 185 {
 186         int             ret;
 187         processor_t     proc;
 188
 189         if (is_boot_cpu)
 190                 return &processor_master;
 191
 192         ret = kmem_alloc(kernel_map, (vm_offset_t *) &proc, sizeof(*proc));
 193         if (ret != KERN_SUCCESS)
 194                 return NULL;
 195
 196         bzero((void *) proc, sizeof(*proc));
 197         return proc;
 198 }
 199
 200 void
 201 cpu_processor_free(processor_t proc)
 202 {
 203         if (proc != NULL && proc != &processor_master)
 204                 kfree((void *) proc, sizeof(*proc));
 205 }
 206
 207 processor_t
 208 current_processor(void)
 209 {
 210         return current_cpu_datap()->cpu_processor;
 211 }
 212
 213 processor_t
 214 cpu_to_processor(
 215         int                     cpu)
 216 {
 217         return cpu_datap(cpu)->cpu_processor;
 218 }
 219
 220 ast_t *
 221 ast_pending(void)
 222 {
 223         return (&current_cpu_datap()->cpu_pending_ast);
 224 }
 225
 226 cpu_type_t
 227 slot_type(
 228         int             slot_num)
 229 {
 230         return (cpu_datap(slot_num)->cpu_type);
 231 }
 232
 233 cpu_subtype_t
 234 slot_subtype(
 235         int             slot_num)
 236 {
 237         return (cpu_datap(slot_num)->cpu_subtype);
 238 }
 239
 240 cpu_threadtype_t
 241 slot_threadtype(
 242         int             slot_num)
 243 {
 244         return (cpu_datap(slot_num)->cpu_threadtype);
 245 }
 246
 247 cpu_type_t
 248 cpu_type(void)
 249 {
 250         return (current_cpu_datap()->cpu_type);
 251 }
 252
 253 cpu_subtype_t
 254 cpu_subtype(void)
 255 {
 256         return (current_cpu_datap()->cpu_subtype);
 257 }
 258
 259 cpu_threadtype_t
 260 cpu_threadtype(void)
 261 {
 262         return (current_cpu_datap()->cpu_threadtype);
 263 }