intr.c revision 331017
1129198Scognet/* $NetBSD: intr.c,v 1.12 2003/07/15 00:24:41 lukem Exp $ */ 2129198Scognet 3139735Simp/*- 4330897Seadler * SPDX-License-Identifier: BSD-4-Clause 5330897Seadler * 6129198Scognet * Copyright (c) 2004 Olivier Houchard. 7129198Scognet * Copyright (c) 1994-1998 Mark Brinicombe. 8129198Scognet * All rights reserved. 9129198Scognet * 10129198Scognet * Redistribution and use in source and binary forms, with or without 11129198Scognet * modification, are permitted provided that the following conditions 12129198Scognet * are met: 13129198Scognet * 1. Redistributions of source code must retain the above copyright 14129198Scognet * notice, this list of conditions and the following disclaimer. 15129198Scognet * 2. Redistributions in binary form must reproduce the above copyright 16129198Scognet * notice, this list of conditions and the following disclaimer in the 17129198Scognet * documentation and/or other materials provided with the distribution. 18129198Scognet * 3. All advertising materials mentioning features or use of this software 19129198Scognet * must display the following acknowledgement: 20129198Scognet * This product includes software developed by Mark Brinicombe 21129198Scognet * for the NetBSD Project. 22129198Scognet * 4. The name of the company nor the name of the author may be used to 23129198Scognet * endorse or promote products derived from this software without specific 24129198Scognet * prior written permission. 25129198Scognet * 26129198Scognet * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 27129198Scognet * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 28129198Scognet * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29129198Scognet * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30129198Scognet * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31129198Scognet * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32129198Scognet * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33129198Scognet * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34129198Scognet * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35129198Scognet * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36129198Scognet * SUCH DAMAGE. 37129198Scognet * 38129198Scognet * Soft interrupt and other generic interrupt functions. 39129198Scognet */ 40129198Scognet 41276032Sandrew#include "opt_platform.h" 42277835Sbr#include "opt_hwpmc_hooks.h" 43276032Sandrew 44129198Scognet#include <sys/cdefs.h> 45129198Scognet__FBSDID("$FreeBSD: stable/11/sys/arm/arm/intr.c 331017 2018-03-15 19:08:33Z kevans $"); 46276032Sandrew 47129198Scognet#include <sys/param.h> 48129198Scognet#include <sys/systm.h> 49236991Simp#include <sys/syslog.h> 50269646Sian#include <sys/kernel.h> 51129198Scognet#include <sys/malloc.h> 52135650Scognet#include <sys/proc.h> 53129198Scognet#include <sys/bus.h> 54129198Scognet#include <sys/interrupt.h> 55129198Scognet#include <sys/conf.h> 56277835Sbr#include <sys/pmc.h> 57277835Sbr#include <sys/pmckern.h> 58331017Skevans#include <sys/vmmeter.h> 59276032Sandrew 60129198Scognet#include <machine/atomic.h> 61281089Sandrew#include <machine/bus.h> 62129198Scognet#include <machine/intr.h> 63129198Scognet#include <machine/cpu.h> 64129198Scognet 65276032Sandrew#ifdef FDT 66276032Sandrew#include <dev/fdt/fdt_common.h> 67276032Sandrew#include <machine/fdt.h> 68276032Sandrew#endif 69276032Sandrew 70245637Sian#define INTRNAME_LEN (MAXCOMLEN + 1) 71245637Sian 72177325Sjhbtypedef void (*mask_fn)(void *); 73177325Sjhb 74151658Sjhbstatic struct intr_event *intr_events[NIRQ]; 75129198Scognet 76292426Sadrianvoid intr_irq_handler(struct trapframe *); 77135650Scognet 78178366Scognetvoid (*arm_post_filter)(void *) = NULL; 79260161Szbbint (*arm_config_irq)(int irq, enum intr_trigger trig, 80260161Szbb enum intr_polarity pol) = NULL; 81178366Scognet 82262979Sian/* Data for statistics reporting. */ 83262979Sianu_long intrcnt[NIRQ]; 84282829Slooschar intrnames[(NIRQ * INTRNAME_LEN) + 1]; 85262979Siansize_t sintrcnt = sizeof(intrcnt); 86262979Siansize_t sintrnames = sizeof(intrnames); 87262979Sian 88245637Sian/* 89245637Sian * Pre-format intrnames into an array of fixed-size strings containing spaces. 90245637Sian * This allows us to avoid the need for an intermediate table of indices into 91245637Sian * the names and counts arrays, while still meeting the requirements and 92245637Sian * assumptions of vmstat(8) and the kdb "show intrcnt" command, the two 93245637Sian * consumers of this data. 94245637Sian */ 95269646Sianstatic void 96269646Sianintr_init(void *unused) 97245637Sian{ 98245637Sian int i; 99245637Sian 100246000Sian for (i = 0; i < NIRQ; ++i) { 101245948Sian snprintf(&intrnames[i * INTRNAME_LEN], INTRNAME_LEN, "%-*s", 102245948Sian INTRNAME_LEN - 1, ""); 103246000Sian } 104245637Sian} 105245637Sian 106269646SianSYSINIT(intr_init, SI_SUB_INTR, SI_ORDER_FIRST, intr_init, NULL); 107269646Sian 108276032Sandrew#ifdef FDT 109276032Sandrewint 110292426Sadrianintr_fdt_map_irq(phandle_t iparent, pcell_t *intr, int icells) 111276032Sandrew{ 112276032Sandrew fdt_pic_decode_t intr_decode; 113276032Sandrew phandle_t intr_parent; 114276032Sandrew int i, rv, interrupt, trig, pol; 115276032Sandrew 116276032Sandrew intr_parent = OF_node_from_xref(iparent); 117276032Sandrew for (i = 0; i < icells; i++) 118276032Sandrew intr[i] = cpu_to_fdt32(intr[i]); 119276032Sandrew 120276032Sandrew for (i = 0; fdt_pic_table[i] != NULL; i++) { 121276032Sandrew intr_decode = fdt_pic_table[i]; 122276032Sandrew rv = intr_decode(intr_parent, intr, &interrupt, &trig, &pol); 123276032Sandrew 124276032Sandrew if (rv == 0) { 125276032Sandrew /* This was recognized as our PIC and decoded. */ 126276032Sandrew interrupt = FDT_MAP_IRQ(intr_parent, interrupt); 127276032Sandrew return (interrupt); 128276032Sandrew } 129276032Sandrew } 130276032Sandrew 131276032Sandrew /* Not in table, so guess */ 132276032Sandrew interrupt = FDT_MAP_IRQ(intr_parent, fdt32_to_cpu(intr[0])); 133276032Sandrew 134276032Sandrew return (interrupt); 135276032Sandrew} 136276032Sandrew#endif 137276032Sandrew 138245637Sianvoid 139236991Simparm_setup_irqhandler(const char *name, driver_filter_t *filt, 140166901Spiso void (*hand)(void*), void *arg, int irq, int flags, void **cookiep) 141129198Scognet{ 142151658Sjhb struct intr_event *event; 143129198Scognet int error; 144129198Scognet 145129198Scognet if (irq < 0 || irq >= NIRQ) 146129198Scognet return; 147151658Sjhb event = intr_events[irq]; 148151658Sjhb if (event == NULL) { 149178092Sjeff error = intr_event_create(&event, (void *)irq, 0, irq, 150177325Sjhb (mask_fn)arm_mask_irq, (mask_fn)arm_unmask_irq, 151178366Scognet arm_post_filter, NULL, "intr%d:", irq); 152129198Scognet if (error) 153129198Scognet return; 154151658Sjhb intr_events[irq] = event; 155283366Sandrew snprintf(&intrnames[irq * INTRNAME_LEN], INTRNAME_LEN, 156246000Sian "irq%d: %-*s", irq, INTRNAME_LEN - 1, name); 157129198Scognet } 158166901Spiso intr_event_add_handler(event, name, filt, hand, arg, 159151658Sjhb intr_priority(flags), flags, cookiep); 160129198Scognet} 161129198Scognet 162147166Scognetint 163182933Srajarm_remove_irqhandler(int irq, void *cookie) 164147166Scognet{ 165182933Sraj struct intr_event *event; 166182933Sraj int error; 167182933Sraj 168182933Sraj event = intr_events[irq]; 169182933Sraj arm_mask_irq(irq); 170283366Sandrew 171182933Sraj error = intr_event_remove_handler(cookie); 172182933Sraj 173182933Sraj if (!TAILQ_EMPTY(&event->ie_handlers)) 174182933Sraj arm_unmask_irq(irq); 175182933Sraj return (error); 176147166Scognet} 177147166Scognet 178129198Scognetvoid dosoftints(void); 179129198Scognetvoid 180129198Scognetdosoftints(void) 181129198Scognet{ 182129198Scognet} 183129198Scognet 184129198Scognetvoid 185292426Sadrianintr_irq_handler(struct trapframe *frame) 186129198Scognet{ 187151658Sjhb struct intr_event *event; 188171616Scognet int i; 189129198Scognet 190170291Sattilio PCPU_INC(cnt.v_intr); 191193847Smarcel i = -1; 192193847Smarcel while ((i = arm_get_next_irq(i)) != -1) { 193245637Sian intrcnt[i]++; 194151658Sjhb event = intr_events[i]; 195177940Sjhb if (intr_event_handle(event, frame) != 0) { 196177940Sjhb /* XXX: Log stray IRQs */ 197171616Scognet arm_mask_irq(i); 198171616Scognet } 199135650Scognet } 200277835Sbr#ifdef HWPMC_HOOKS 201277835Sbr if (pmc_hook && (PCPU_GET(curthread)->td_pflags & TDP_CALLCHAIN)) 202277835Sbr pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, frame); 203277835Sbr#endif 204129198Scognet} 205