1/* $NetBSD: intr.c,v 1.12 2003/07/15 00:24:41 lukem Exp $ */ 2 3/*- 4 * Copyright (c) 2004 Olivier Houchard. 5 * Copyright (c) 1994-1998 Mark Brinicombe. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Mark Brinicombe 19 * for the NetBSD Project. 20 * 4. The name of the company nor the name of the author may be used to 21 * endorse or promote products derived from this software without specific 22 * prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * Soft interrupt and other generic interrupt functions. 37 */ 38 39#include "opt_platform.h" 40#include "opt_hwpmc_hooks.h" 41 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD: stable/11/sys/arm/arm/intr.c 331722 2018-03-29 02:50:57Z eadler $"); 44 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/syslog.h> 48#include <sys/kernel.h> 49#include <sys/malloc.h> 50#include <sys/proc.h> 51#include <sys/bus.h> 52#include <sys/interrupt.h> 53#include <sys/conf.h> 54#include <sys/pmc.h> 55#include <sys/pmckern.h> 56#include <sys/vmmeter.h> 57 58#include <machine/atomic.h> 59#include <machine/bus.h> 60#include <machine/intr.h> 61#include <machine/cpu.h> 62 63#ifdef FDT 64#include <dev/fdt/fdt_common.h> 65#include <machine/fdt.h> 66#endif 67 68#define INTRNAME_LEN (MAXCOMLEN + 1) 69 70typedef void (*mask_fn)(void *); 71 72static struct intr_event *intr_events[NIRQ]; 73 74void intr_irq_handler(struct trapframe *); 75 76void (*arm_post_filter)(void *) = NULL; 77int (*arm_config_irq)(int irq, enum intr_trigger trig, 78 enum intr_polarity pol) = NULL; 79 80/* Data for statistics reporting. */ 81u_long intrcnt[NIRQ]; 82char intrnames[(NIRQ * INTRNAME_LEN) + 1]; 83size_t sintrcnt = sizeof(intrcnt); 84size_t sintrnames = sizeof(intrnames); 85 86/* 87 * Pre-format intrnames into an array of fixed-size strings containing spaces. 88 * This allows us to avoid the need for an intermediate table of indices into 89 * the names and counts arrays, while still meeting the requirements and 90 * assumptions of vmstat(8) and the kdb "show intrcnt" command, the two 91 * consumers of this data. 92 */ 93static void 94intr_init(void *unused) 95{ 96 int i; 97 98 for (i = 0; i < NIRQ; ++i) { 99 snprintf(&intrnames[i * INTRNAME_LEN], INTRNAME_LEN, "%-*s", 100 INTRNAME_LEN - 1, ""); 101 } 102} 103 104SYSINIT(intr_init, SI_SUB_INTR, SI_ORDER_FIRST, intr_init, NULL); 105 106#ifdef FDT 107int 108intr_fdt_map_irq(phandle_t iparent, pcell_t *intr, int icells) 109{ 110 fdt_pic_decode_t intr_decode; 111 phandle_t intr_parent; 112 int i, rv, interrupt, trig, pol; 113 114 intr_parent = OF_node_from_xref(iparent); 115 for (i = 0; i < icells; i++) 116 intr[i] = cpu_to_fdt32(intr[i]); 117 118 for (i = 0; fdt_pic_table[i] != NULL; i++) { 119 intr_decode = fdt_pic_table[i]; 120 rv = intr_decode(intr_parent, intr, &interrupt, &trig, &pol); 121 122 if (rv == 0) { 123 /* This was recognized as our PIC and decoded. */ 124 interrupt = FDT_MAP_IRQ(intr_parent, interrupt); 125 return (interrupt); 126 } 127 } 128 129 /* Not in table, so guess */ 130 interrupt = FDT_MAP_IRQ(intr_parent, fdt32_to_cpu(intr[0])); 131 132 return (interrupt); 133} 134#endif 135 136void 137arm_setup_irqhandler(const char *name, driver_filter_t *filt, 138 void (*hand)(void*), void *arg, int irq, int flags, void **cookiep) 139{ 140 struct intr_event *event; 141 int error; 142 143 if (irq < 0 || irq >= NIRQ) 144 return; 145 event = intr_events[irq]; 146 if (event == NULL) { 147 error = intr_event_create(&event, (void *)irq, 0, irq, 148 (mask_fn)arm_mask_irq, (mask_fn)arm_unmask_irq, 149 arm_post_filter, NULL, "intr%d:", irq); 150 if (error) 151 return; 152 intr_events[irq] = event; 153 snprintf(&intrnames[irq * INTRNAME_LEN], INTRNAME_LEN, 154 "irq%d: %-*s", irq, INTRNAME_LEN - 1, name); 155 } 156 intr_event_add_handler(event, name, filt, hand, arg, 157 intr_priority(flags), flags, cookiep); 158} 159 160int 161arm_remove_irqhandler(int irq, void *cookie) 162{ 163 struct intr_event *event; 164 int error; 165 166 event = intr_events[irq]; 167 arm_mask_irq(irq); 168 169 error = intr_event_remove_handler(cookie); 170 171 if (!TAILQ_EMPTY(&event->ie_handlers)) 172 arm_unmask_irq(irq); 173 return (error); 174} 175 176void dosoftints(void); 177void 178dosoftints(void) 179{ 180} 181 182void 183intr_irq_handler(struct trapframe *frame) 184{ 185 struct intr_event *event; 186 int i; 187 188 PCPU_INC(cnt.v_intr); 189 i = -1; 190 while ((i = arm_get_next_irq(i)) != -1) { 191 intrcnt[i]++; 192 event = intr_events[i]; 193 if (intr_event_handle(event, frame) != 0) { 194 /* XXX: Log stray IRQs */ 195 arm_mask_irq(i); 196 } 197 } 198#ifdef HWPMC_HOOKS 199 if (pmc_hook && (PCPU_GET(curthread)->td_pflags & TDP_CALLCHAIN)) 200 pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, frame); 201#endif 202} 203