ia64/xen-unstable

view linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/hw_irq.h @ 8534:da7873110bbb

Tiny bootstrap cleanup.

Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Mon Jan 09 19:46:46 2006 +0100 (2006-01-09)
parents 06d84bf87159
children
line source
1 #ifndef _ASM_HW_IRQ_H
2 #define _ASM_HW_IRQ_H
4 /*
5 * linux/include/asm/hw_irq.h
6 *
7 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
8 *
9 * moved some of the old arch/i386/kernel/irq.h to here. VY
10 *
11 * IRQ/IPI changes taken from work by Thomas Radke
12 * <tomsoft@informatik.tu-chemnitz.de>
13 *
14 * hacked by Andi Kleen for x86-64.
15 *
16 * $Id: hw_irq.h,v 1.24 2001/09/14 20:55:03 vojtech Exp $
17 */
19 #ifndef __ASSEMBLY__
20 #include <linux/config.h>
21 #include <asm/atomic.h>
22 #include <asm/irq.h>
23 #include <linux/profile.h>
24 #include <linux/smp.h>
26 struct hw_interrupt_type;
27 #endif
29 /*
30 * IDT vectors usable for external interrupt sources start
31 * at 0x20:
32 */
33 #define FIRST_EXTERNAL_VECTOR 0x20
35 #define IA32_SYSCALL_VECTOR 0x80
38 /*
39 * Vectors 0x20-0x2f are used for ISA interrupts.
40 */
42 /*
43 * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
44 *
45 * some of the following vectors are 'rare', they are merged
46 * into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
47 * TLB, reschedule and local APIC vectors are performance-critical.
48 *
49 * Vectors 0xf0-0xf9 are free (reserved for future Linux use).
50 */
51 #ifndef CONFIG_XEN
52 #define SPURIOUS_APIC_VECTOR 0xff
53 #define ERROR_APIC_VECTOR 0xfe
54 #define INVALIDATE_TLB_VECTOR 0xfd
55 #define RESCHEDULE_VECTOR 0xfc
56 #define TASK_MIGRATION_VECTOR 0xfb
57 #define CALL_FUNCTION_VECTOR 0xfa
58 #define KDB_VECTOR 0xf9
60 #define THERMAL_APIC_VECTOR 0xf0
61 #endif
63 /*
64 * Local APIC timer IRQ vector is on a different priority level,
65 * to work around the 'lost local interrupt if more than 2 IRQ
66 * sources per level' errata.
67 */
68 #define LOCAL_TIMER_VECTOR 0xef
70 /*
71 * First APIC vector available to drivers: (vectors 0x30-0xee)
72 * we start at 0x31 to spread out vectors evenly between priority
73 * levels. (0x80 is the syscall vector)
74 */
75 #define FIRST_DEVICE_VECTOR 0x31
76 #define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */
79 #ifndef __ASSEMBLY__
80 extern u8 irq_vector[NR_IRQ_VECTORS];
81 #define IO_APIC_VECTOR(irq) (irq_vector[irq])
82 #define AUTO_ASSIGN -1
84 /*
85 * Various low-level irq details needed by irq.c, process.c,
86 * time.c, io_apic.c and smp.c
87 *
88 * Interrupt entry/exit code at both C and assembly level
89 */
91 extern void disable_8259A_irq(unsigned int irq);
92 extern void enable_8259A_irq(unsigned int irq);
93 extern int i8259A_irq_pending(unsigned int irq);
94 extern void make_8259A_irq(unsigned int irq);
95 extern void init_8259A(int aeoi);
96 extern void FASTCALL(send_IPI_self(int vector));
97 extern void init_VISWS_APIC_irqs(void);
98 extern void setup_IO_APIC(void);
99 extern void disable_IO_APIC(void);
100 extern void print_IO_APIC(void);
101 extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
102 extern void send_IPI(int dest, int vector);
103 extern void setup_ioapic_dest(void);
105 extern unsigned long io_apic_irqs;
107 extern atomic_t irq_err_count;
108 extern atomic_t irq_mis_count;
110 #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
112 #define __STR(x) #x
113 #define STR(x) __STR(x)
115 #include <asm/ptrace.h>
117 #define IRQ_NAME2(nr) nr##_interrupt(void)
118 #define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
120 /*
121 * SMP has a few special interrupts for IPI messages
122 */
124 #define BUILD_IRQ(nr) \
125 asmlinkage void IRQ_NAME(nr); \
126 __asm__( \
127 "\n.p2align\n" \
128 "IRQ" #nr "_interrupt:\n\t" \
129 "push $" #nr "-256 ; " \
130 "jmp common_interrupt");
132 extern void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i);
134 #define platform_legacy_irq(irq) ((irq) < 16)
136 #endif
138 #endif /* _ASM_HW_IRQ_H */