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         PE_cpu_machine_quiesce(cdp->cpu_id);
  95
  96         cpu_thread_halt();
  97 }
  98
  99 void
 100 cpu_init(void)
 101 {
 102         cpu_data_t      *cdp = current_cpu_datap();
 103
 104         timer_call_initialize_queue(&cdp->rtclock_timer.queue);
 105         cdp->rtclock_timer.deadline = EndOfAllTime;
 106
 107         cdp->cpu_type = cpuid_cputype();
 108         cdp->cpu_subtype = cpuid_cpusubtype();
 109
 110         i386_activate_cpu();
 111 }
 112
 113 kern_return_t
 114 cpu_start(
 115         int cpu)
 116 {
 117         kern_return_t           ret;
 118
 119         if (cpu == cpu_number()) {
 120                 cpu_machine_init();
 121                 return KERN_SUCCESS;
 122         }
 123
 124         /*
 125          * Try to bring the CPU back online without a reset.
 126          * If the fast restart doesn't succeed, fall back to
 127          * the slow way.
 128          */
 129         ret = intel_startCPU_fast(cpu);
 130         if (ret != KERN_SUCCESS) {
 131                 /*
 132                  * Should call out through PE.
 133                  * But take the shortcut here.
 134                  */
 135                 ret = intel_startCPU(cpu);
 136         }
 137
 138         if (ret != KERN_SUCCESS)
 139                 kprintf("cpu: cpu_start(%d) returning failure!\n", cpu);
 140
 141         return(ret);
 142 }
 143
 144 void
 145 cpu_exit_wait(
 146         int cpu)
 147 {
 148         cpu_data_t      *cdp = cpu_datap(cpu);
 149
 150         /*
 151          * Wait until the CPU indicates that it has stopped.
 152          */
 153         simple_lock(&x86_topo_lock);
 154         while ((cdp->lcpu.state != LCPU_HALT)
 155                && (cdp->lcpu.state != LCPU_OFF)
 156                && !cdp->lcpu.stopped) {
 157             simple_unlock(&x86_topo_lock);
 158             cpu_pause();
 159             simple_lock(&x86_topo_lock);
 160         }
 161         simple_unlock(&x86_topo_lock);
 162 }
 163
 164 void
 165 cpu_machine_init(
 166         void)
 167 {
 168         cpu_data_t      *cdp = current_cpu_datap();
 169
 170         PE_cpu_machine_init(cdp->cpu_id, !cdp->cpu_boot_complete);
 171         cdp->cpu_boot_complete = TRUE;
 172         cdp->cpu_running = TRUE;
 173         ml_init_interrupt();
 174
 175 #if CONFIG_VMX
 176         /* for every CPU, get the VT specs */
 177         vmx_get_specs();
 178 #endif
 179 }
 180
 181 processor_t
 182 cpu_processor_alloc(boolean_t is_boot_cpu)
 183 {
 184         int             ret;
 185         processor_t     proc;
 186
 187         if (is_boot_cpu)
 188                 return &processor_master;
 189
 190         ret = kmem_alloc(kernel_map, (vm_offset_t *) &proc, sizeof(*proc));
 191         if (ret != KERN_SUCCESS)
 192                 return NULL;
 193
 194         bzero((void *) proc, sizeof(*proc));
 195         return proc;
 196 }
 197
 198 void
 199 cpu_processor_free(processor_t proc)
 200 {
 201         if (proc != NULL && proc != &processor_master)
 202                 kfree((void *) proc, sizeof(*proc));
 203 }
 204
 205 processor_t
 206 current_processor(void)
 207 {
 208         return current_cpu_datap()->cpu_processor;
 209 }
 210
 211 processor_t
 212 cpu_to_processor(
 213         int                     cpu)
 214 {
 215         return cpu_datap(cpu)->cpu_processor;
 216 }
 217
 218 ast_t *
 219 ast_pending(void)
 220 {
 221         return (&current_cpu_datap()->cpu_pending_ast);
 222 }
 223
 224 cpu_type_t
 225 slot_type(
 226         int             slot_num)
 227 {
 228         return (cpu_datap(slot_num)->cpu_type);
 229 }
 230
 231 cpu_subtype_t
 232 slot_subtype(
 233         int             slot_num)
 234 {
 235         return (cpu_datap(slot_num)->cpu_subtype);
 236 }
 237
 238 cpu_threadtype_t
 239 slot_threadtype(
 240         int             slot_num)
 241 {
 242         return (cpu_datap(slot_num)->cpu_threadtype);
 243 }
 244
 245 cpu_type_t
 246 cpu_type(void)
 247 {
 248         return (current_cpu_datap()->cpu_type);
 249 }
 250
 251 cpu_subtype_t
 252 cpu_subtype(void)
 253 {
 254         return (current_cpu_datap()->cpu_subtype);
 255 }
 256
 257 cpu_threadtype_t
 258 cpu_threadtype(void)
 259 {
 260         return (current_cpu_datap()->cpu_threadtype);
 261 }