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/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/rman.h> 38 #include <sys/kernel.h> 39 #include <sys/lock.h> 40 #include <sys/module.h> 41 #include <sys/mutex.h> 42 #include <machine/bus.h> 43 44 #include <arm64/coresight/coresight.h> 45 46 static struct mtx cs_mtx; 47 struct coresight_device_list cs_devs; 48 49 int 50 coresight_register(struct coresight_desc *desc) 51 { 52 struct coresight_device *cs_dev; 53 54 cs_dev = malloc(sizeof(struct coresight_device), 55 M_CORESIGHT, M_WAITOK | M_ZERO); 56 cs_dev->dev = desc->dev; 57 cs_dev->pdata = desc->pdata; 58 cs_dev->dev_type = desc->dev_type; 59 60 mtx_lock(&cs_mtx); 61 TAILQ_INSERT_TAIL(&cs_devs, cs_dev, link); 62 mtx_unlock(&cs_mtx); 63 64 return (0); 65 } 66 67 struct endpoint * 68 coresight_get_output_endpoint(struct coresight_platform_data *pdata) 69 { 70 struct endpoint *endp; 71 72 if (pdata->out_ports != 1) 73 return (NULL); 74 75 TAILQ_FOREACH(endp, &pdata->endpoints, link) { 76 if (endp->input == 0) 77 return (endp); 78 } 79 80 return (NULL); 81 } 82 83 struct coresight_device * 84 coresight_get_output_device(struct endpoint *endp, struct endpoint **out_endp) 85 { 86 struct coresight_platform_data *pdata; 87 struct coresight_device *cs_dev; 88 struct endpoint *endp2; 89 90 TAILQ_FOREACH(cs_dev, &cs_devs, link) { 91 pdata = cs_dev->pdata; 92 TAILQ_FOREACH(endp2, &cs_dev->pdata->endpoints, link) { 93 switch (pdata->bus_type) { 94 case CORESIGHT_BUS_FDT: 95 #ifdef FDT 96 if (endp->their_node == endp2->my_node) { 97 *out_endp = endp2; 98 return (cs_dev); 99 } 100 #endif 101 break; 102 103 case CORESIGHT_BUS_ACPI: 104 #ifdef DEV_ACPI 105 if (endp->their_handle == endp2->my_handle) { 106 *out_endp = endp2; 107 return (cs_dev); 108 } 109 #endif 110 break; 111 } 112 } 113 } 114 115 return (NULL); 116 } 117 118 static void 119 coresight_init(void) 120 { 121 122 mtx_init(&cs_mtx, "ARM Coresight", NULL, MTX_DEF); 123 TAILQ_INIT(&cs_devs); 124 } 125 126 SYSINIT(coresight, SI_SUB_DRIVERS, SI_ORDER_FIRST, coresight_init, NULL); 127