git.oblomov.eu Git - linux-2.6/blob - 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
  20 #include <asm/smp.h>
  21 #include <asm/ipi.h>
  22 #include <asm/genapic.h>
  23
  24 extern struct genapic apic_flat;
  25 extern struct genapic apic_physflat;
  26 extern struct genapic apic_x2xpic_uv_x;
  27 extern struct genapic apic_x2apic_phys;
  28 extern struct genapic apic_x2apic_cluster;
  29
  30 struct genapic __read_mostly *genapic = &apic_flat;
  31
  32 static struct genapic *apic_probe[] __initdata = {
  33         &apic_x2apic_uv_x,
  34         &apic_x2apic_phys,
  35         &apic_x2apic_cluster,
  36         &apic_physflat,
  37         NULL,
  38 };
  39
  40 /*
  41  * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
  42  */
  43 void __init setup_apic_routing(void)
  44 {
  45         if (genapic == &apic_flat) {
  46                 if (max_physical_apicid >= 8)
  47                         genapic = &apic_physflat;
  48                 printk(KERN_INFO "Setting APIC routing to %s\n", genapic->name);
  49         }
  50 }
  51
  52 /* Same for both flat and physical. */
  53
  54 void apic_send_IPI_self(int vector)
  55 {
  56         __send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
  57 }
  58
  59 int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
  60 {
  61         int i;
  62
  63         for (i = 0; apic_probe[i]; ++i) {
  64                 if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) {
  65                         genapic = apic_probe[i];
  66                         printk(KERN_INFO "Setting APIC routing to %s.\n",
  67                                 genapic->name);
  68                         return 1;
  69                 }
  70         }
  71         return 0;
  72 }