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 int lapic_to_cpu[MAX_LAPICIDS];
52 int cpu_to_lapic[MAX_CPUS];
53
54 void
lapic_cpu_map_init(void)55 lapic_cpu_map_init(void)
56 {
57 int i;
58
59 for (i = 0; i < MAX_CPUS; i++) {
60 cpu_to_lapic[i] = -1;
61 }
62 for (i = 0; i < MAX_LAPICIDS; i++) {
63 lapic_to_cpu[i] = -1;
64 }
65 }
66
67 void
lapic_cpu_map(int apic_id,int cpu)68 lapic_cpu_map(int apic_id, int cpu)
69 {
70 assert(apic_id < MAX_LAPICIDS);
71 assert(cpu < MAX_CPUS);
72 cpu_to_lapic[cpu] = apic_id;
73 lapic_to_cpu[apic_id] = cpu;
74 }
75
76 /*
77 * Retrieve the local apic ID a cpu.
78 *
79 * Returns the local apic ID for the given processor.
80 * If the processor does not exist or apic not configured, returns -1.
81 */
82
83 uint32_t
ml_get_apicid(uint32_t cpu)84 ml_get_apicid(uint32_t cpu)
85 {
86 if (cpu >= (uint32_t)MAX_CPUS) {
87 return 0xFFFFFFFF; /* Return -1 if cpu too big */
88 }
89 /* Return the apic ID (or -1 if not configured) */
90 return (uint32_t)cpu_to_lapic[cpu];
91 }
92
93 uint32_t
ml_get_cpuid(uint32_t lapic_index)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