LXR linux/arch/x86/include/asm/ipi.h

   1#ifndef _ASM_X86_IPI_H
   2#define _ASM_X86_IPI_H
   3
   4#ifdef CONFIG_X86_LOCAL_APIC
   5
   6/*
   7 * Copyright 2004 James Cleverdon, IBM.
   8 * Subject to the GNU Public License, v.2
   9 *
  10 * Generic APIC InterProcessor Interrupt code.
  11 *
  12 * Moved to include file by James Cleverdon from
  13 * arch/x86-64/kernel/smp.c
  14 *
  15 * Copyrights from kernel/smp.c:
  16 *
  17 * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
  18 * (c) 1998-99, 2000 Ingo Molnar <mingo@redhat.com>
  19 * (c) 2002,2003 Andi Kleen, SuSE Labs.
  20 * Subject to the GNU Public License, v.2
  21 */
  22
  23#include <asm/hw_irq.h>
  24#include <asm/apic.h>
  25#include <asm/smp.h>
  26
  27/*
  28 * the following functions deal with sending IPIs between CPUs.
  29 *
  30 * We use 'broadcast', CPU->CPU IPIs and self-IPIs too.
  31 */
  32
  33static inline unsigned int __prepare_ICR(unsigned int shortcut, int vector,
  34                                         unsigned int dest)
  35{
  36        unsigned int icr = shortcut | dest;
  37
  38        switch (vector) {
  39        default:
  40                icr |= APIC_DM_FIXED | vector;
  41                break;
  42        case NMI_VECTOR:
  43                icr |= APIC_DM_NMI;
  44                break;
  45        }
  46        return icr;
  47}
  48
  49static inline int __prepare_ICR2(unsigned int mask)
  50{
  51        return SET_APIC_DEST_FIELD(mask);
  52}
  53
  54static inline void __xapic_wait_icr_idle(void)
  55{
  56        while (native_apic_mem_read(APIC_ICR) & APIC_ICR_BUSY)
  57                cpu_relax();
  58}
  59
  60void __default_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest);
  61
  62/*
  63 * This is used to send an IPI with no shorthand notation (the destination is
  64 * specified in bits 56 to 63 of the ICR).
  65 */
  66void __default_send_IPI_dest_field(unsigned int mask, int vector, unsigned int dest);
  67
  68extern void default_send_IPI_single(int cpu, int vector);
  69extern void default_send_IPI_single_phys(int cpu, int vector);
  70extern void default_send_IPI_mask_sequence_phys(const struct cpumask *mask,
  71                                                 int vector);
  72extern void default_send_IPI_mask_allbutself_phys(const struct cpumask *mask,
  73                                                         int vector);
  74
  75/* Avoid include hell */
  76#define NMI_VECTOR 0x02
  77
  78extern int no_broadcast;
  79
  80static inline void __default_local_send_IPI_allbutself(int vector)
  81{
  82        if (no_broadcast || vector == NMI_VECTOR)
  83                apic->send_IPI_mask_allbutself(cpu_online_mask, vector);
  84        else
  85                __default_send_IPI_shortcut(APIC_DEST_ALLBUT, vector, apic->dest_logical);
  86}
  87
  88static inline void __default_local_send_IPI_all(int vector)
  89{
  90        if (no_broadcast || vector == NMI_VECTOR)
  91                apic->send_IPI_mask(cpu_online_mask, vector);
  92        else
  93                __default_send_IPI_shortcut(APIC_DEST_ALLINC, vector, apic->dest_logical);
  94}
  95
  96#ifdef CONFIG_X86_32
  97extern void default_send_IPI_mask_sequence_logical(const struct cpumask *mask,
  98                                                         int vector);
  99extern void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask,
 100                                                         int vector);
 101extern void default_send_IPI_mask_logical(const struct cpumask *mask,
 102                                                 int vector);
 103extern void default_send_IPI_allbutself(int vector);
 104extern void default_send_IPI_all(int vector);
 105extern void default_send_IPI_self(int vector);
 106#endif
 107
 108#endif
 109
 110#endif /* _ASM_X86_IPI_H */
 111