osfmk/i386/lapic.c

   1 /*
   2  * Copyright (c) 2008-2010 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  * @OSF_COPYRIGHT@
  30  */
  31
  32 #include <mach/mach_types.h>
  33 #include <mach/kern_return.h>
  34
  35 #include <i386/lapic.h>
  36 #include <i386/cpuid.h>
  37 #include <i386/proc_reg.h>
  38 #include <i386/machine_cpu.h>
  39 #include <i386/misc_protos.h>
  40 #include <i386/mp.h>
  41 #include <i386/postcode.h>
  42 #include <i386/cpu_threads.h>
  43 #include <i386/machine_routines.h>
  44 #include <i386/tsc.h>
  45
  46 #include <sys/kdebug.h>
  47
  48 /* Base vector for local APIC interrupt sources */
  49 int lapic_interrupt_base = LAPIC_DEFAULT_INTERRUPT_BASE;
  50
  51 #define         MAX_LAPICIDS    (LAPIC_ID_MAX+1)
  52 int             lapic_to_cpu[MAX_LAPICIDS];
  53 int             cpu_to_lapic[MAX_CPUS];
  54
  55 void
  56 lapic_cpu_map_init(void)
  57 {
  58         int     i;
  59
  60         for (i = 0; i < MAX_CPUS; i++)
  61                 cpu_to_lapic[i] = -1;
  62         for (i = 0; i < MAX_LAPICIDS; i++)
  63                 lapic_to_cpu[i] = -1;
  64 }
  65
  66 void
  67 lapic_cpu_map(int apic_id, int cpu)
  68 {
  69         assert(apic_id < MAX_LAPICIDS);
  70         assert(cpu < MAX_CPUS);
  71         cpu_to_lapic[cpu] = apic_id;
  72         lapic_to_cpu[apic_id] = cpu;
  73 }
  74
  75 /*
  76  * Retrieve the local apic ID a cpu.
  77  *
  78  * Returns the local apic ID for the given processor.
  79  * If the processor does not exist or apic not configured, returns -1.
  80  */
  81
  82 uint32_t
  83 ml_get_apicid(uint32_t cpu)
  84 {
  85         if(cpu >= (uint32_t)MAX_CPUS)
  86                 return 0xFFFFFFFF;      /* Return -1 if cpu too big */
  87
  88         /* Return the apic ID (or -1 if not configured) */
  89         return (uint32_t)cpu_to_lapic[cpu];
  90
  91 }
  92
  93 uint32_t
  94 ml_get_cpuid(uint32_t lapic_index)
  95 {
  96         if(lapic_index >= (uint32_t)MAX_LAPICIDS)
  97                 return 0xFFFFFFFF;      /* Return -1 if cpu too big */
  98
  99         /* Return the cpu ID (or -1 if not configured) */
 100         return (uint32_t)lapic_to_cpu[lapic_index];
 101
 102 }