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
__prepare_ICR(unsigned int shortcut,int vector,unsigned int dest)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
__prepare_ICR2(unsigned int mask)49 static inline int __prepare_ICR2(unsigned int mask)
50 {
51 return SET_APIC_DEST_FIELD(mask);
52 }
53
__xapic_wait_icr_idle(void)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
__default_local_send_IPI_allbutself(int vector)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
__default_local_send_IPI_all(int vector)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 */
111