FreeBSD/Linux Kernel Cross Reference
sys/i386/xen/mptable.c
1 /*-
2 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
3 * Copyright (c) 1996, by Steve Passe
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. The name of the developer may NOT be used to endorse or promote products
12 * derived from this software without specific prior written permission.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/9.0/sys/i386/xen/mptable.c 224120 2011-07-17 01:23:50Z jhb $");
29
30 #include <sys/param.h>
31 #include <sys/bus.h>
32 #include <sys/kernel.h>
33
34 #include <vm/vm.h>
35 #include <vm/vm_param.h>
36 #include <vm/pmap.h>
37
38 #include <machine/frame.h>
39 #include <machine/intr_machdep.h>
40 #include <machine/apicvar.h>
41
42 #include <xen/hypervisor.h>
43 #include <machine/xen/xen-os.h>
44 #include <machine/smp.h>
45 #include <xen/interface/vcpu.h>
46
47
48 static int mptable_probe(void);
49 static int mptable_probe_cpus(void);
50 static void mptable_register(void *dummy);
51 static int mptable_setup_local(void);
52 static int mptable_setup_io(void);
53
54 static struct apic_enumerator mptable_enumerator = {
55 "MPTable",
56 mptable_probe,
57 mptable_probe_cpus,
58 mptable_setup_local,
59 mptable_setup_io
60 };
61
62 static int
63 mptable_probe(void)
64 {
65
66 return (-100);
67 }
68
69 static int
70 mptable_probe_cpus(void)
71 {
72 int i, rc;
73
74 for (i = 0; i < MAXCPU; i++) {
75 rc = HYPERVISOR_vcpu_op(VCPUOP_is_up, i, NULL);
76 if (rc >= 0)
77 cpu_add(i, (i == 0));
78 }
79
80 return (0);
81 }
82
83 /*
84 * Initialize the local APIC on the BSP.
85 */
86 static int
87 mptable_setup_local(void)
88 {
89
90 return (0);
91 }
92
93 static int
94 mptable_setup_io(void)
95 {
96
97 return (0);
98 }
99
100 static void
101 mptable_register(void *dummy __unused)
102 {
103
104 apic_register_enumerator(&mptable_enumerator);
105 }
106 SYSINIT(mptable_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, mptable_register,
107 NULL);
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