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
  33 static 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
  49 static inline int __prepare_ICR2(unsigned int mask)
  50 {
  51         return SET_APIC_DEST_FIELD(mask);
  52 }
  53
  54 static inline void __xapic_wait_icr_idle(void)
  55 {
  56         while (native_apic_mem_read(APIC_ICR) & APIC_ICR_BUSY)
  57                 cpu_relax();
  58 }
  59
  60 void __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  */
  66 void __default_send_IPI_dest_field(unsigned int mask, int vector, unsigned int dest);
  67
  68 extern void default_send_IPI_single(int cpu, int vector);
  69 extern void default_send_IPI_single_phys(int cpu, int vector);
  70 extern void default_send_IPI_mask_sequence_phys(const struct cpumask *mask,
  71                                                  int vector);
  72 extern 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
  78 extern int no_broadcast;
  79
  80 static 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
  88 static 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
  97 extern void default_send_IPI_mask_sequence_logical(const struct cpumask *mask,
  98                                                          int vector);
  99 extern void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask,
 100                                                          int vector);
 101 extern void default_send_IPI_mask_logical(const struct cpumask *mask,
 102                                                  int vector);
 103 extern void default_send_IPI_allbutself(int vector);
 104 extern void default_send_IPI_all(int vector);
 105 extern void default_send_IPI_self(int vector);
 106 #endif
 107
 108 #endif
 109
 110 #endif /* _ASM_X86_IPI_H */