c9ea007c3b
o Parse the ACPI DSD (Device Specific Data) graph property and record device connections. o Split-out FDT support to a separate file. o Get the corresponding (FDT/ACPI) Coresight platform data in the device drivers. Sponsored by: DARPA, AFRL
160 lines
4.3 KiB
C
160 lines
4.3 KiB
C
/*-
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* Copyright (c) 2018-2020 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <arm64/coresight/coresight.h>
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#include "coresight_if.h"
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extern struct coresight_device_list cs_devs;
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static struct coresight_device *
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coresight_next_device(struct coresight_device *cs_dev,
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struct coresight_event *event)
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{
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struct coresight_device *out;
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struct endpoint *out_endp;
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struct endpoint *endp;
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TAILQ_FOREACH(endp, &cs_dev->pdata->endpoints, link) {
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if (endp->input != 0)
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continue;
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out = coresight_get_output_device(endp, &out_endp);
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if (out != NULL) {
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if (LIST_EMPTY(&event->endplist)) {
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/* Add source device */
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endp->cs_dev = cs_dev;
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LIST_INSERT_HEAD(&event->endplist, endp,
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endplink);
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}
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/* Add output device */
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if (bootverbose)
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printf("Adding device %s to the chain\n",
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device_get_nameunit(out->dev));
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out_endp->cs_dev = out;
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LIST_INSERT_HEAD(&event->endplist, out_endp, endplink);
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return (out);
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}
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}
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return (NULL);
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}
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static int
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coresight_build_list(struct coresight_device *cs_dev,
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struct coresight_event *event)
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{
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struct coresight_device *out;
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out = cs_dev;
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while (out != NULL)
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out = coresight_next_device(out, event);
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return (0);
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}
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int
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coresight_init_event(int cpu, struct coresight_event *event)
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{
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struct coresight_device *cs_dev;
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struct endpoint *endp;
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/* Start building path from source device */
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TAILQ_FOREACH(cs_dev, &cs_devs, link) {
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if (cs_dev->dev_type == event->src &&
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cs_dev->pdata->cpu == cpu) {
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LIST_INIT(&event->endplist);
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coresight_build_list(cs_dev, event);
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break;
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}
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}
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/* Ensure Coresight is initialized for the CPU */
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TAILQ_FOREACH(cs_dev, &cs_devs, link) {
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if (cs_dev->dev_type == CORESIGHT_CPU_DEBUG &&
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cs_dev->pdata->cpu == cpu)
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CORESIGHT_INIT(cs_dev->dev);
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}
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/* Init all devices in the path */
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LIST_FOREACH(endp, &event->endplist, endplink) {
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cs_dev = endp->cs_dev;
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CORESIGHT_INIT(cs_dev->dev);
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}
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return (0);
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}
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void
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coresight_enable(int cpu, struct coresight_event *event)
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{
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struct coresight_device *cs_dev;
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struct endpoint *endp;
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LIST_FOREACH(endp, &event->endplist, endplink) {
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cs_dev = endp->cs_dev;
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CORESIGHT_ENABLE(cs_dev->dev, endp, event);
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}
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}
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void
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coresight_disable(int cpu, struct coresight_event *event)
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{
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struct coresight_device *cs_dev;
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struct endpoint *endp;
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LIST_FOREACH(endp, &event->endplist, endplink) {
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cs_dev = endp->cs_dev;
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CORESIGHT_DISABLE(cs_dev->dev, endp, event);
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}
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}
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void
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coresight_read(int cpu, struct coresight_event *event)
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{
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struct endpoint *endp;
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LIST_FOREACH(endp, &event->endplist, endplink)
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CORESIGHT_READ(endp->cs_dev->dev, endp, event);
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}
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