LXR linux/arch/x86/kernel/apic/probe

   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/apic.h>
  23#include <asm/ipi.h>
  24#include <asm/setup.h>
  25
  26/*
  27 * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
  28 */
  29void __init default_setup_apic_routing(void)
  30{
  31        struct apic **drv;
  32
  33        enable_IR_x2apic();
  34
  35        for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
  36                if ((*drv)->probe && (*drv)->probe()) {
  37                        if (apic != *drv) {
  38                                apic = *drv;
  39                                pr_info("Switched APIC routing to %s.\n",
  40                                        apic->name);
  41                        }
  42                        break;
  43                }
  44        }
  45
  46        if (x86_platform.apic_post_init)
  47                x86_platform.apic_post_init();
  48}
  49
  50/* Same for both flat and physical. */
  51
  52void apic_send_IPI_self(int vector)
  53{
  54        __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
  55}
  56
  57int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
  58{
  59        struct apic **drv;
  60
  61        for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
  62                if ((*drv)->acpi_madt_oem_check(oem_id, oem_table_id)) {
  63                        if (apic != *drv) {
  64                                apic = *drv;
  65                                pr_info("Setting APIC routing to %s.\n",
  66                                        apic->name);
  67                        }
  68                        return 1;
  69                }
  70        }
  71        return 0;
  72}
  73