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/* $OpenBSD: intrdefs.h,v 1.2 2004/06/25 17:27:01 andreas Exp $ */
/* $NetBSD: intrdefs.h,v 1.2 2003/05/04 22:01:56 fvdl Exp $ */
#ifndef _i386_INTRDEFS_H
#define _i386_INTRDEFS_H
/*
* Interrupt priority levels.
*
* There are tty, network and disk drivers that use free() at interrupt
* time, so imp > (tty | net | bio).
*
* Since run queues may be manipulated by both the statclock and tty,
* network, and disk drivers, clock > imp.
*
* IPL_HIGH must block everything that can manipulate a run queue.
*
* We need serial drivers to run at the absolute highest priority to
* avoid overruns, so serial > high.
*
* The level numbers are picked to fit into APIC vector priorities.
*
*/
#define IPL_NONE 0x0 /* nothing */
#define IPL_SOFTCLOCK 0x4 /* timeouts */
#define IPL_SOFTNET 0x5 /* protocol stacks */
#define IPL_BIO 0x6 /* block I/O */
#define IPL_NET 0x7 /* network */
#define IPL_SOFTSERIAL 0x8 /* serial */
#define IPL_TTY 0x9 /* terminal */
#define IPL_VM 0xa /* memory allocation */
#define IPL_IMP IPL_VM
#define IPL_AUDIO 0xb /* audio */
#define IPL_CLOCK 0xc /* clock */
#define IPL_SCHED IPL_CLOCK
#define IPL_STATCLOCK IPL_CLOCK
#define IPL_HIGH 0xd /* everything */
#define IPL_SERIAL 0xd /* serial */
#define IPL_IPI 0xe /* inter-processor interrupts */
#define NIPL 16
/* Interrupt sharing types. */
#define IST_NONE 0 /* none */
#define IST_PULSE 1 /* pulsed */
#define IST_EDGE 2 /* edge-triggered */
#define IST_LEVEL 3 /* level-triggered */
/*
* Local APIC masks. Must not conflict with SIR_* above, and must
* be >= NUM_LEGACY_IRQs. Note that LIR_IPI must be first.
*/
#define LIR_IPI 31
#define LIR_TIMER 30
/* Soft interrupt masks. */
#define SIR_CLOCK 29
#define SIR_NET 28
#define SIR_SERIAL 27
/*
* Maximum # of interrupt sources per CPU. 32 to fit in one word.
* ioapics can theoretically produce more, but it's not likely to
* happen. For multiple ioapics, things can be routed to different
* CPUs.
*/
#define MAX_INTR_SOURCES 32
#define NUM_LEGACY_IRQS 16
/*
* Low and high boundaries between which interrupt gates will
* be allocated in the IDT.
*/
#define IDT_INTR_LOW (0x20 + NUM_LEGACY_IRQS)
#define IDT_INTR_HIGH 0xef
#define X86_IPI_HALT 0x00000001
#define X86_IPI_MICROSET 0x00000002
#define X86_IPI_FLUSH_FPU 0x00000004
#define X86_IPI_SYNCH_FPU 0x00000008
#define X86_IPI_TLB 0x00000010
#define X86_IPI_MTRR 0x00000020
#define X86_IPI_GDT 0x00000040
#define X86_IPI_DDB 0x00000080
#define X86_NIPI 8
#define X86_IPI_NAMES { "halt IPI", "timeset IPI", "FPU flush IPI", \
"FPU synch IPI", "TLB shootdown IPI", \
"MTRR update IPI", "GDT update IPI", "ddb IPI" }
#define IREENT_MAGIC 0x18041969
#endif /* _X86_INTRDEFS_H */
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