intrdefs.h revision 1.1 
1/*	$NetBSD: intrdefs.h,v 1.1 2002/11/22 15:07:38 fvdl Exp $	*/
2
3#ifndef _i386_INTRDEFS_H
4#define _i386_INTRDEFS_H
5
6/*
7 * Interrupt priority levels.
8 *
9 * There are tty, network and disk drivers that use free() at interrupt
10 * time, so imp > (tty | net | bio).
11 *
12 * Since run queues may be manipulated by both the statclock and tty,
13 * network, and disk drivers, clock > imp.
14 *
15 * IPL_HIGH must block everything that can manipulate a run queue.
16 *
17 * We need serial drivers to run at the absolute highest priority to
18 * avoid overruns, so serial > high.
19 *
20 * The level numbers are picked to fit into APIC vector priorities.
21 *
22 */
23#define	IPL_NONE	0x0	/* nothing */
24#define	IPL_SOFTCLOCK	0x4	/* timeouts */
25#define	IPL_SOFTNET	0x5	/* protocol stacks */
26#define	IPL_BIO		0x6	/* block I/O */
27#define	IPL_NET		0x7	/* network */
28#define	IPL_SOFTSERIAL	0x8	/* serial */
29#define	IPL_TTY		0x9	/* terminal */
30#define	IPL_VM		0xa	/* memory allocation */
31#define IPL_IMP		IPL_VM
32#define	IPL_AUDIO	0xb	/* audio */
33#define	IPL_CLOCK	0xc	/* clock */
34#define IPL_SCHED	IPL_CLOCK
35#define	IPL_HIGH	0xd	/* everything */
36#define	IPL_SERIAL	0xd	/* serial */
37#define IPL_IPI		0xe	/* inter-processor interrupts */
38#define	NIPL		16
39
40/* Interrupt sharing types. */
41#define	IST_NONE	0	/* none */
42#define	IST_PULSE	1	/* pulsed */
43#define	IST_EDGE	2	/* edge-triggered */
44#define	IST_LEVEL	3	/* level-triggered */
45
46/* Soft interrupt masks. */
47#define	SIR_CLOCK	31
48#define	SIR_NET	30
49#define	SIR_SERIAL	29
50
51/*
52 * Local APIC masks. Must not conflict with SIR_* above, and must
53 * be >= NUM_LEGACY_IRQs.
54 */
55#define LIR_TIMER	28
56#define LIR_IPI		27
57
58/*
59 * Maximum # of interrupt sources per CPU. 32 to fit in one word.
60 * ioapics can theoretically produce more, but it's not likely to
61 * happen. For multiple ioapics, things can be routed to different
62 * CPUs.
63 */
64#define MAX_INTR_SOURCES	32
65#define NUM_LEGACY_IRQS		16
66
67/*
68 * Low and high boundaries between which interrupt gates will
69 * be allocated in the IDT.
70 */
71#define IDT_INTR_LOW	(0x20 + NUM_LEGACY_IRQS)
72#define IDT_INTR_HIGH	0xef
73
74#define I386_IPI_HALT			0x00000001
75#define I386_IPI_MICROSET		0x00000002
76#define I386_IPI_FLUSH_FPU		0x00000004
77#define I386_IPI_SYNCH_FPU		0x00000008
78#define I386_IPI_TLB			0x00000010
79#define I386_IPI_MTRR			0x00000020
80#define I386_IPI_GDT			0x00000040
81
82#define I386_NIPI		7
83
84#define I386_IPI_NAMES { "halt IPI", "timeset IPI", "FPU flush IPI", \
85			 "FPU synch IPI", "TLB shootdown IPI", \
86			 "MTRR update IPI", "GDT update IPI" }
87
88#endif /* _I386_INTRDEFS_H */
89