intr_machdep.h revision 153241
174462Salfred/*- 274462Salfred * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org> 3258578Shrs * All rights reserved. 4258578Shrs * 5258578Shrs * Redistribution and use in source and binary forms, with or without 68858Srgrimes * modification, are permitted provided that the following conditions 7258578Shrs * are met: 8258578Shrs * 1. Redistributions of source code must retain the above copyright 9258578Shrs * notice, this list of conditions and the following disclaimer. 10258578Shrs * 2. Redistributions in binary form must reproduce the above copyright 11258578Shrs * notice, this list of conditions and the following disclaimer in the 12258578Shrs * documentation and/or other materials provided with the distribution. 13258578Shrs * 14258578Shrs * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15258578Shrs * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16258578Shrs * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 178858Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18258578Shrs * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19258578Shrs * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20258578Shrs * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21258578Shrs * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22258578Shrs * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23258578Shrs * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24258578Shrs * SUCH DAMAGE. 25258578Shrs * 26258578Shrs * $FreeBSD: head/sys/amd64/include/intr_machdep.h 153241 2005-12-08 18:33:30Z jhb $ 27258578Shrs */ 28258578Shrs 298858Srgrimes#ifndef __MACHINE_INTR_MACHDEP_H__ 301903Swollman#define __MACHINE_INTR_MACHDEP_H__ 311903Swollman 3250473Speter#ifdef _KERNEL 331839Swollman 341839Swollman/* 351839Swollman * The maximum number of I/O interrupts we allow. This number is rather 361839Swollman * arbitrary as it is just the maximum IRQ resource value. The interrupt 371839Swollman * source for a given IRQ maps that I/O interrupt to device interrupt 381839Swollman * source whether it be a pin on an interrupt controller or an MSI interrupt. 391839Swollman * The 16 ISA IRQs are assigned fixed IDT vectors, but all other device 401839Swollman * interrupts allocate IDT vectors on demand. Currently we have 191 IDT 411839Swollman * vectors available for device interrupts. On many systems with I/O APICs, 4274462Salfred * a lot of the IRQs are not used, so this number can be much larger than 4374462Salfred * 191 and still be safe since only interrupt sources in actual use will 441903Swollman * allocate IDT vectors. 4574462Salfred * 461839Swollman * For now we stick with 255 as ISA IRQs and PCI intline IRQs only allow 471839Swollman * for IRQs in the range 0 - 254. When MSI support is added this number 481839Swollman * will likely increase. 491839Swollman */ 501839Swollman#define NUM_IO_INTS 255 511839Swollman 521839Swollman/* 531839Swollman * - 1 ??? dummy counter. 541839Swollman * - 2 counters for each I/O interrupt. 551839Swollman * - 1 counter for each CPU for lapic timer. 561839Swollman * - 7 counters for each CPU for IPI counters for SMP. 571839Swollman */ 581839Swollman#ifdef SMP 591839Swollman#define INTRCNT_COUNT (1 + NUM_IO_INTS * 2 + 1) 601839Swollman#else 611839Swollman#define INTRCNT_COUNT (1 + NUM_IO_INTS * 2 + (1 + 7) * MAXCPU) 621839Swollman#endif 631839Swollman 641839Swollman#ifndef LOCORE 651839Swollman 661839Swollmantypedef void inthand_t(u_int cs, u_int ef, u_int esp, u_int ss); 671839Swollman 681839Swollman#define IDTVEC(name) __CONCAT(X,name) 691839Swollman 701839Swollmanstruct intsrc; 711839Swollman 721839Swollman/* 731839Swollman * Methods that a PIC provides to mask/unmask a given interrupt source, 741839Swollman * "turn on" the interrupt on the CPU side by setting up an IDT entry, and 751839Swollman * return the vector associated with this source. 761839Swollman */ 771839Swollmanstruct pic { 781839Swollman void (*pic_enable_source)(struct intsrc *); 791839Swollman void (*pic_disable_source)(struct intsrc *, int); 801839Swollman void (*pic_eoi_source)(struct intsrc *); 811839Swollman void (*pic_enable_intr)(struct intsrc *); 821839Swollman int (*pic_vector)(struct intsrc *); 831839Swollman int (*pic_source_pending)(struct intsrc *); 841839Swollman void (*pic_suspend)(struct intsrc *); 851839Swollman void (*pic_resume)(struct intsrc *); 861839Swollman int (*pic_config_intr)(struct intsrc *, enum intr_trigger, 871839Swollman enum intr_polarity); 881839Swollman}; 891839Swollman 901839Swollman/* Flags for pic_disable_source() */ 911839Swollmanenum { 9274462Salfred PIC_EOI, 9374462Salfred PIC_NO_EOI, 941839Swollman}; 951839Swollman 961839Swollman/* 971839Swollman * An interrupt source. The upper-layer code uses the PIC methods to 981839Swollman * control a given source. The lower-layer PIC drivers can store additional 991839Swollman * private data in a given interrupt source such as an interrupt pin number 1001839Swollman * or an I/O APIC pointer. 1011839Swollman */ 1021839Swollmanstruct intsrc { 1031839Swollman struct pic *is_pic; 1041839Swollman struct intr_event *is_event; 1051839Swollman u_long *is_count; 1061839Swollman u_long *is_straycount; 1071839Swollman u_int is_index; 1081839Swollman}; 1091839Swollman 1101839Swollmanstruct trapframe; 1111839Swollman 11274462Salfredextern struct mtx icu_lock; 11374462Salfredextern int elcr_found; 1141839Swollman 1151839Swollman/* XXX: The elcr_* prototypes probably belong somewhere else. */ 1161839Swollmanint elcr_probe(void); 1171839Swollmanenum intr_trigger elcr_read_trigger(u_int irq); 1181839Swollmanvoid elcr_resume(void); 1191839Swollmanvoid elcr_write_trigger(u_int irq, enum intr_trigger trigger); 1201839Swollmanint intr_add_handler(const char *name, int vector, driver_intr_t handler, 1211839Swollman void *arg, enum intr_type flags, void **cookiep); 1221839Swollmanint intr_config_intr(int vector, enum intr_trigger trig, 1231839Swollman enum intr_polarity pol); 1241839Swollmanvoid intr_execute_handlers(struct intsrc *isrc, struct trapframe *frame); 1251839Swollmanstruct intsrc *intr_lookup_source(int vector); 1261839Swollmanint intr_register_source(struct intsrc *isrc); 1271839Swollmanint intr_remove_handler(void *cookie); 1281839Swollmanvoid intr_resume(void); 1291839Swollmanvoid intr_suspend(void); 1301839Swollmanvoid intrcnt_add(const char *name, u_long **countp); 1311839Swollman 1321839Swollman#endif /* !LOCORE */ 1331839Swollman#endif /* _KERNEL */ 1341839Swollman#endif /* !__MACHINE_INTR_MACHDEP_H__ */ 1351839Swollman