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.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
  50 struct processor        processor_master;
  51
  52 /*ARGSUSED*/
  53 kern_return_t
  54 cpu_control(
  55         int                     slot_num,
  56         processor_info_t        info,
  57         unsigned int            count)
  58 {
  59         printf("cpu_control(%d,%p,%d) not implemented\n",
  60                 slot_num, info, count);
  61         return (KERN_FAILURE);
  62 }
  63
  64 /*ARGSUSED*/
  65 kern_return_t
  66 cpu_info_count(
  67         __unused processor_flavor_t      flavor,
  68         unsigned int                    *count)
  69 {
  70         *count = 0;
  71         return (KERN_FAILURE);
  72 }
  73
  74 /*ARGSUSED*/
  75 kern_return_t
  76 cpu_info(
  77         processor_flavor_t      flavor,
  78         int                     slot_num,
  79         processor_info_t        info,
  80         unsigned int            *count)
  81 {
  82         printf("cpu_info(%d,%d,%p,%p) not implemented\n",
  83                 flavor, slot_num, info, count);
  84         return (KERN_FAILURE);
  85 }
  86
  87 void
  88 cpu_sleep(void)
  89 {
  90         cpu_data_t      *cdp = current_cpu_datap();
  91
  92         i386_deactivate_cpu();
  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         cdp->cpu_type = cpuid_cputype();
 105         cdp->cpu_subtype = cpuid_cpusubtype();
 106
 107         i386_activate_cpu();
 108 }
 109
 110 kern_return_t
 111 cpu_start(
 112         int cpu)
 113 {
 114         kern_return_t           ret;
 115
 116         if (cpu == cpu_number()) {
 117                 cpu_machine_init();
 118                 return KERN_SUCCESS;
 119         }
 120
 121         /*
 122          * Try to bring the CPU back online without a reset.
 123          * If the fast restart doesn't succeed, fall back to
 124          * the slow way.
 125          */
 126         ret = intel_startCPU_fast(cpu);
 127         if (ret != KERN_SUCCESS) {
 128                 /*
 129                  * Should call out through PE.
 130                  * But take the shortcut here.
 131                  */
 132                 ret = intel_startCPU(cpu);
 133         }
 134
 135         if (ret != KERN_SUCCESS)
 136                 kprintf("cpu: cpu_start(%d) returning failure!\n", cpu);
 137
 138         return(ret);
 139 }
 140
 141 void
 142 cpu_exit_wait(
 143         int cpu)
 144 {
 145         cpu_data_t      *cdp = cpu_datap(cpu);
 146
 147         /*
 148          * Wait until the CPU indicates that it has stopped.
 149          */
 150         simple_lock(&x86_topo_lock);
 151         while ((cdp->lcpu.state != LCPU_HALT)
 152                && (cdp->lcpu.state != LCPU_OFF)
 153                && !cdp->lcpu.stopped) {
 154             simple_unlock(&x86_topo_lock);
 155             cpu_pause();
 156             simple_lock(&x86_topo_lock);
 157         }
 158         simple_unlock(&x86_topo_lock);
 159 }
 160
 161 void
 162 cpu_machine_init(
 163         void)
 164 {
 165         cpu_data_t      *cdp = current_cpu_datap();
 166
 167         PE_cpu_machine_init(cdp->cpu_id, !cdp->cpu_boot_complete);
 168         cdp->cpu_boot_complete = TRUE;
 169         cdp->cpu_running = TRUE;
 170 #if 0
 171         if (cpu_datap(cpu)->hibernate)
 172         {
 173             cpu_datap(cpu)->hibernate = 0;
 174             hibernate_machine_init();
 175         }
 176 #endif
 177         ml_init_interrupt();
 178
 179 #if CONFIG_VMX
 180         /* for every CPU, get the VT specs */
 181         vmx_get_specs();
 182 #endif
 183 }
 184
 185 processor_t
 186 cpu_processor_alloc(boolean_t is_boot_cpu)
 187 {
 188         int             ret;
 189         processor_t     proc;
 190
 191         if (is_boot_cpu)
 192                 return &processor_master;
 193
 194         ret = kmem_alloc(kernel_map, (vm_offset_t *) &proc, sizeof(*proc));
 195         if (ret != KERN_SUCCESS)
 196                 return NULL;
 197
 198         bzero((void *) proc, sizeof(*proc));
 199         return proc;
 200 }
 201
 202 void
 203 cpu_processor_free(processor_t proc)
 204 {
 205         if (proc != NULL && proc != &processor_master)
 206                 kfree((void *) proc, sizeof(*proc));
 207 }
 208
 209 processor_t
 210 current_processor(void)
 211 {
 212         return current_cpu_datap()->cpu_processor;
 213 }
 214
 215 processor_t
 216 cpu_to_processor(
 217         int                     cpu)
 218 {
 219         return cpu_datap(cpu)->cpu_processor;
 220 }
 221
 222 ast_t *
 223 ast_pending(void)
 224 {
 225         return (&current_cpu_datap()->cpu_pending_ast);
 226 }
 227
 228 cpu_type_t
 229 slot_type(
 230         int             slot_num)
 231 {
 232         return (cpu_datap(slot_num)->cpu_type);
 233 }
 234
 235 cpu_subtype_t
 236 slot_subtype(
 237         int             slot_num)
 238 {
 239         return (cpu_datap(slot_num)->cpu_subtype);
 240 }
 241
 242 cpu_threadtype_t
 243 slot_threadtype(
 244         int             slot_num)
 245 {
 246         return (cpu_datap(slot_num)->cpu_threadtype);
 247 }
 248
 249
 250
 251 cpu_type_t
 252 cpu_type(void)
 253 {
 254         return (current_cpu_datap()->cpu_type);
 255 }
 256
 257 cpu_subtype_t
 258 cpu_subtype(void)
 259 {
 260         return (current_cpu_datap()->cpu_subtype);
 261 }
 262
 263 cpu_threadtype_t
 264 cpu_threadtype(void)
 265 {
 266         return (current_cpu_datap()->cpu_threadtype);
 267 }