intr_machdep.h revision 151979
1121982Sjhb/*- 2121982Sjhb * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org> 3121982Sjhb * All rights reserved. 4121982Sjhb * 5121982Sjhb * Redistribution and use in source and binary forms, with or without 6121982Sjhb * modification, are permitted provided that the following conditions 7121982Sjhb * are met: 8121982Sjhb * 1. Redistributions of source code must retain the above copyright 9121982Sjhb * notice, this list of conditions and the following disclaimer. 10121982Sjhb * 2. Redistributions in binary form must reproduce the above copyright 11121982Sjhb * notice, this list of conditions and the following disclaimer in the 12121982Sjhb * documentation and/or other materials provided with the distribution. 13121982Sjhb * 14121982Sjhb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15121982Sjhb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16121982Sjhb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17121982Sjhb * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18121982Sjhb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19121982Sjhb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20121982Sjhb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21121982Sjhb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22121982Sjhb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23121982Sjhb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24121982Sjhb * SUCH DAMAGE. 25121982Sjhb * 26121982Sjhb * $FreeBSD: head/sys/amd64/include/intr_machdep.h 151979 2005-11-02 20:11:47Z jhb $ 27121982Sjhb */ 28121982Sjhb 29121982Sjhb#ifndef __MACHINE_INTR_MACHDEP_H__ 30121982Sjhb#define __MACHINE_INTR_MACHDEP_H__ 31121982Sjhb 32121982Sjhb#ifdef _KERNEL 33121982Sjhb 34151979Sjhb/* 35151979Sjhb * The maximum number of I/O interrupts we allow. This number is rather 36151979Sjhb * arbitrary as it is just the maximum IRQ resource value. The interrupt 37151979Sjhb * source for a given IRQ maps that I/O interrupt to device interrupt 38151979Sjhb * source whether it be a pin on an interrupt controller or an MSI interrupt. 39151979Sjhb * The 16 ISA IRQs are assigned fixed IDT vectors, but all other device 40151979Sjhb * interrupts allocate IDT vectors on demand. Currently we have 191 IDT 41151979Sjhb * vectors available for device interrupts. On many systems with I/O APICs, 42151979Sjhb * a lot of the IRQs are not used, so this number can be much larger than 43151979Sjhb * 191 and still be safe since only interrupt sources in actual use will 44151979Sjhb * allocate IDT vectors. 45151979Sjhb * 46151979Sjhb * For now we stick with 255 as ISA IRQs and PCI intline IRQs only allow 47151979Sjhb * for IRQs in the range 0 - 254. When MSI support is added this number 48151979Sjhb * will likely increase. 49151979Sjhb */ 50151979Sjhb#define NUM_IO_INTS 255 51121982Sjhb 52151979Sjhb/* 53151979Sjhb * - 1 ??? dummy counter. 54151979Sjhb * - 2 counters for each I/O interrupt. 55151979Sjhb * - 1 counter for each CPU for lapic timer. 56151979Sjhb * - 7 counters for each CPU for IPI counters for SMP. 57151979Sjhb */ 58151979Sjhb#ifdef SMP 59151979Sjhb#define INTRCNT_COUNT (1 + NUM_IO_INTS * 2 + 1) 60151979Sjhb#else 61151979Sjhb#define INTRCNT_COUNT (1 + NUM_IO_INTS * 2 + (1 + 7) * MAXCPU) 62151979Sjhb#endif 63151979Sjhb 64121982Sjhb#ifndef LOCORE 65121982Sjhb 66121982Sjhbtypedef void inthand_t(u_int cs, u_int ef, u_int esp, u_int ss); 67121982Sjhb 68121982Sjhb#define IDTVEC(name) __CONCAT(X,name) 69121982Sjhb 70121982Sjhbstruct intsrc; 71121982Sjhb 72121982Sjhb/* 73121982Sjhb * Methods that a PIC provides to mask/unmask a given interrupt source, 74121982Sjhb * "turn on" the interrupt on the CPU side by setting up an IDT entry, and 75121982Sjhb * return the vector associated with this source. 76121982Sjhb */ 77121982Sjhbstruct pic { 78121982Sjhb void (*pic_enable_source)(struct intsrc *); 79133907Speter void (*pic_disable_source)(struct intsrc *, int); 80121982Sjhb void (*pic_eoi_source)(struct intsrc *); 81121982Sjhb void (*pic_enable_intr)(struct intsrc *); 82121982Sjhb int (*pic_vector)(struct intsrc *); 83121982Sjhb int (*pic_source_pending)(struct intsrc *); 84121982Sjhb void (*pic_suspend)(struct intsrc *); 85121982Sjhb void (*pic_resume)(struct intsrc *); 86129284Speter int (*pic_config_intr)(struct intsrc *, enum intr_trigger, 87129284Speter enum intr_polarity); 88121982Sjhb}; 89121982Sjhb 90133907Speter/* Flags for pic_disable_source() */ 91133907Speterenum { 92133907Speter PIC_EOI, 93133907Speter PIC_NO_EOI, 94133907Speter}; 95133907Speter 96121982Sjhb/* 97121982Sjhb * An interrupt source. The upper-layer code uses the PIC methods to 98121982Sjhb * control a given source. The lower-layer PIC drivers can store additional 99121982Sjhb * private data in a given interrupt source such as an interrupt pin number 100121982Sjhb * or an I/O APIC pointer. 101121982Sjhb */ 102121982Sjhbstruct intsrc { 103121982Sjhb struct pic *is_pic; 104151658Sjhb struct intr_event *is_event; 105121982Sjhb u_long *is_count; 106121982Sjhb u_long *is_straycount; 107121982Sjhb u_int is_index; 108121982Sjhb}; 109121982Sjhb 110121982Sjhbstruct intrframe; 111121982Sjhb 112121982Sjhbextern struct mtx icu_lock; 113140555Speterextern int elcr_found; 114121982Sjhb 115129284Speter/* XXX: The elcr_* prototypes probably belong somewhere else. */ 116129284Speterint elcr_probe(void); 117129284Speterenum intr_trigger elcr_read_trigger(u_int irq); 118129284Spetervoid elcr_resume(void); 119129284Spetervoid elcr_write_trigger(u_int irq, enum intr_trigger trigger); 120121982Sjhbint intr_add_handler(const char *name, int vector, driver_intr_t handler, 121121982Sjhb void *arg, enum intr_type flags, void **cookiep); 122129284Speterint intr_config_intr(int vector, enum intr_trigger trig, 123129284Speter enum intr_polarity pol); 124121982Sjhbvoid intr_execute_handlers(struct intsrc *isrc, struct intrframe *iframe); 125121982Sjhbstruct intsrc *intr_lookup_source(int vector); 126121982Sjhbint intr_register_source(struct intsrc *isrc); 127121982Sjhbint intr_remove_handler(void *cookie); 128121982Sjhbvoid intr_resume(void); 129121982Sjhbvoid intr_suspend(void); 130140555Spetervoid intrcnt_add(const char *name, u_long **countp); 131121982Sjhb 132121982Sjhb#endif /* !LOCORE */ 133121982Sjhb#endif /* _KERNEL */ 134121982Sjhb#endif /* !__MACHINE_INTR_MACHDEP_H__ */ 135