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1da177e4 LT |
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 | */ | |
1da177e4 LT |
11 | #include <linux/threads.h> |
12 | #include <linux/cpumask.h> | |
13 | #include <linux/string.h> | |
07c7c474 | 14 | #include <linux/module.h> |
1da177e4 LT |
15 | #include <linux/kernel.h> |
16 | #include <linux/ctype.h> | |
17 | #include <linux/init.h> | |
ac23d4ee | 18 | #include <linux/hardirq.h> |
d25ae38b | 19 | #include <linux/dmar.h> |
1da177e4 LT |
20 | |
21 | #include <asm/smp.h> | |
22 | #include <asm/ipi.h> | |
00f1ea69 | 23 | #include <asm/genapic.h> |
54ac14a8 | 24 | #include <asm/setup.h> |
1da177e4 | 25 | |
1b9b89e7 YL |
26 | extern struct genapic apic_flat; |
27 | extern struct genapic apic_physflat; | |
28 | extern struct genapic apic_x2xpic_uv_x; | |
29 | extern struct genapic apic_x2apic_phys; | |
30 | extern struct genapic apic_x2apic_cluster; | |
1da177e4 | 31 | |
f18d397e | 32 | struct genapic __read_mostly *genapic = &apic_flat; |
1da177e4 | 33 | |
1b9b89e7 YL |
34 | static struct genapic *apic_probe[] __initdata = { |
35 | &apic_x2apic_uv_x, | |
36 | &apic_x2apic_phys, | |
37 | &apic_x2apic_cluster, | |
38 | &apic_physflat, | |
39 | NULL, | |
40 | }; | |
ae261868 | 41 | |
1da177e4 LT |
42 | /* |
43 | * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode. | |
44 | */ | |
3c43f039 | 45 | void __init setup_apic_routing(void) |
1da177e4 | 46 | { |
d25ae38b YL |
47 | if (genapic == &apic_x2apic_phys || genapic == &apic_x2apic_cluster) { |
48 | if (!intr_remapping_enabled) | |
49 | genapic = &apic_flat; | |
50 | } | |
51 | ||
1b9b89e7 YL |
52 | if (genapic == &apic_flat) { |
53 | if (max_physical_apicid >= 8) | |
54 | genapic = &apic_physflat; | |
55 | printk(KERN_INFO "Setting APIC routing to %s\n", genapic->name); | |
56 | } | |
54ac14a8 YL |
57 | |
58 | if (x86_quirks->update_genapic) | |
59 | x86_quirks->update_genapic(); | |
1da177e4 LT |
60 | } |
61 | ||
07c7c474 | 62 | /* Same for both flat and physical. */ |
1da177e4 | 63 | |
cff73a6f | 64 | void apic_send_IPI_self(int vector) |
1da177e4 LT |
65 | { |
66 | __send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL); | |
67 | } | |
ae261868 JS |
68 | |
69 | int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id) | |
70 | { | |
1b9b89e7 YL |
71 | int i; |
72 | ||
73 | for (i = 0; apic_probe[i]; ++i) { | |
74 | if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) { | |
75 | genapic = apic_probe[i]; | |
76 | printk(KERN_INFO "Setting APIC routing to %s.\n", | |
77 | genapic->name); | |
78 | return 1; | |
79 | } | |
ae261868 JS |
80 | } |
81 | return 0; | |
82 | } |