1 /*- 2 * Copyright (c) 2018-2020 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/rman.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <machine/bus.h> 38 39 #include <arm64/coresight/coresight.h> 40 41 #include "coresight_if.h" 42 43 extern struct coresight_device_list cs_devs; 44 45 static struct coresight_device * 46 coresight_next_device(struct coresight_device *cs_dev, 47 struct coresight_event *event) 48 { 49 struct coresight_device *out; 50 struct endpoint *out_endp; 51 struct endpoint *endp; 52 53 TAILQ_FOREACH(endp, &cs_dev->pdata->endpoints, link) { 54 if (endp->input != 0) 55 continue; 56 57 out = coresight_get_output_device(endp, &out_endp); 58 if (out != NULL) { 59 if (LIST_EMPTY(&event->endplist)) { 60 /* Add source device */ 61 endp->cs_dev = cs_dev; 62 LIST_INSERT_HEAD(&event->endplist, endp, 63 endplink); 64 } 65 66 /* Add output device */ 67 if (bootverbose) 68 printf("Adding device %s to the chain\n", 69 device_get_nameunit(out->dev)); 70 out_endp->cs_dev = out; 71 LIST_INSERT_HEAD(&event->endplist, out_endp, endplink); 72 73 return (out); 74 } 75 } 76 77 return (NULL); 78 } 79 80 static int 81 coresight_build_list(struct coresight_device *cs_dev, 82 struct coresight_event *event) 83 { 84 struct coresight_device *out; 85 86 out = cs_dev; 87 while (out != NULL) 88 out = coresight_next_device(out, event); 89 90 return (0); 91 } 92 93 int 94 coresight_init_event(int cpu, struct coresight_event *event) 95 { 96 struct coresight_device *cs_dev; 97 struct endpoint *endp; 98 99 /* Start building path from source device */ 100 TAILQ_FOREACH(cs_dev, &cs_devs, link) { 101 if (cs_dev->dev_type == event->src && 102 cs_dev->pdata->cpu == cpu) { 103 LIST_INIT(&event->endplist); 104 coresight_build_list(cs_dev, event); 105 break; 106 } 107 } 108 109 /* Ensure Coresight is initialized for the CPU */ 110 TAILQ_FOREACH(cs_dev, &cs_devs, link) { 111 if (cs_dev->dev_type == CORESIGHT_CPU_DEBUG && 112 cs_dev->pdata->cpu == cpu) 113 CORESIGHT_INIT(cs_dev->dev); 114 } 115 116 /* Init all devices in the path */ 117 LIST_FOREACH(endp, &event->endplist, endplink) { 118 cs_dev = endp->cs_dev; 119 CORESIGHT_INIT(cs_dev->dev); 120 } 121 122 return (0); 123 } 124 125 void 126 coresight_enable(int cpu, struct coresight_event *event) 127 { 128 struct coresight_device *cs_dev; 129 struct endpoint *endp; 130 131 LIST_FOREACH(endp, &event->endplist, endplink) { 132 cs_dev = endp->cs_dev; 133 CORESIGHT_ENABLE(cs_dev->dev, endp, event); 134 } 135 } 136 137 void 138 coresight_disable(int cpu, struct coresight_event *event) 139 { 140 struct coresight_device *cs_dev; 141 struct endpoint *endp; 142 143 LIST_FOREACH(endp, &event->endplist, endplink) { 144 cs_dev = endp->cs_dev; 145 CORESIGHT_DISABLE(cs_dev->dev, endp, event); 146 } 147 } 148 149 void 150 coresight_read(int cpu, struct coresight_event *event) 151 { 152 struct endpoint *endp; 153 154 LIST_FOREACH(endp, &event->endplist, endplink) 155 CORESIGHT_READ(endp->cs_dev->dev, endp, event); 156 } 157