x86: print out if acpi want physical flat of all
[linux-2.6] / arch / x86 / kernel / genapic_64.c
1 /*
2  * Copyright 2004 James Cleverdon, IBM.
3  * Subject to the GNU Public License, v.2
4  *
5  * Generic APIC sub-arch probe layer.
6  *
7  * Hacked for x86-64 by James Cleverdon from i386 architecture code by
8  * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
9  * James Cleverdon.
10  */
11 #include <linux/threads.h>
12 #include <linux/cpumask.h>
13 #include <linux/string.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/ctype.h>
17 #include <linux/init.h>
18 #include <linux/hardirq.h>
19 #include <linux/dmar.h>
20
21 #include <asm/smp.h>
22 #include <asm/ipi.h>
23 #include <asm/genapic.h>
24
25 extern struct genapic apic_flat;
26 extern struct genapic apic_physflat;
27 extern struct genapic apic_x2xpic_uv_x;
28 extern struct genapic apic_x2apic_phys;
29 extern struct genapic apic_x2apic_cluster;
30
31 struct genapic __read_mostly *genapic = &apic_flat;
32
33 static struct genapic *apic_probe[] __initdata = {
34         &apic_x2apic_uv_x,
35         &apic_x2apic_phys,
36         &apic_x2apic_cluster,
37         &apic_physflat,
38         NULL,
39 };
40
41 /*
42  * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
43  */
44 void __init setup_apic_routing(void)
45 {
46         if (genapic == &apic_x2apic_phys || genapic == &apic_x2apic_cluster) {
47                 if (!intr_remapping_enabled)
48                         genapic = &apic_flat;
49         }
50
51         if (genapic == &apic_flat) {
52                 if (max_physical_apicid >= 8)
53                         genapic = &apic_physflat;
54                 printk(KERN_INFO "Setting APIC routing to %s\n", genapic->name);
55         }
56 }
57
58 /* Same for both flat and physical. */
59
60 void apic_send_IPI_self(int vector)
61 {
62         __send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
63 }
64
65 int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
66 {
67         int i;
68
69         for (i = 0; apic_probe[i]; ++i) {
70                 if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) {
71                         genapic = apic_probe[i];
72                         printk(KERN_INFO "Setting APIC routing to %s.\n",
73                                 genapic->name);
74                         return 1;
75                 }
76         }
77         return 0;
78 }