152 lines
4.3 KiB
C
152 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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#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/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <arm64/coresight/coresight.h>
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static int
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coresight_fdt_get_ports(phandle_t dev_node,
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struct coresight_platform_data *pdata)
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{
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phandle_t node, child;
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pcell_t port_reg;
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phandle_t xref;
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char *name;
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int ret;
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phandle_t endpoint_child;
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struct endpoint *endp;
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child = ofw_bus_find_child(dev_node, "ports");
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if (child)
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node = child;
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else
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node = dev_node;
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for (child = OF_child(node); child != 0; child = OF_peer(child)) {
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ret = OF_getprop_alloc(child, "name", (void **)&name);
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if (ret == -1)
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continue;
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if (strcasecmp(name, "port") ||
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strncasecmp(name, "port@", 6)) {
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port_reg = -1;
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OF_getencprop(child, "reg", (void *)&port_reg,
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sizeof(port_reg));
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endpoint_child = ofw_bus_find_child(child, "endpoint");
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if (endpoint_child) {
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if (OF_getencprop(endpoint_child,
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"remote-endpoint", &xref,
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sizeof(xref)) == -1) {
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printf("failed\n");
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continue;
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}
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endp = malloc(sizeof(struct endpoint),
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M_CORESIGHT, M_WAITOK | M_ZERO);
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endp->my_node = endpoint_child;
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endp->their_node = OF_node_from_xref(xref);
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endp->dev_node = dev_node;
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endp->reg = port_reg;
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if (OF_getproplen(endpoint_child,
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"slave-mode") >= 0) {
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pdata->in_ports++;
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endp->input = 1;
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} else
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pdata->out_ports++;
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mtx_lock(&pdata->mtx_lock);
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TAILQ_INSERT_TAIL(&pdata->endpoints,
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endp, link);
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mtx_unlock(&pdata->mtx_lock);
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}
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}
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}
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return (0);
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}
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static int
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coresight_fdt_get_cpu(phandle_t node,
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struct coresight_platform_data *pdata)
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{
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phandle_t cpu_node;
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pcell_t xref;
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pcell_t cpu_reg;
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if (OF_getencprop(node, "cpu", &xref, sizeof(xref)) != -1) {
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cpu_node = OF_node_from_xref(xref);
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if (OF_getencprop(cpu_node, "reg", (void *)&cpu_reg,
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sizeof(cpu_reg)) > 0) {
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pdata->cpu = cpu_reg;
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return (0);
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}
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}
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return (-1);
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}
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struct coresight_platform_data *
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coresight_fdt_get_platform_data(device_t dev)
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{
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struct coresight_platform_data *pdata;
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phandle_t node;
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node = ofw_bus_get_node(dev);
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pdata = malloc(sizeof(struct coresight_platform_data),
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M_CORESIGHT, M_WAITOK | M_ZERO);
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pdata->bus_type = CORESIGHT_BUS_FDT;
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mtx_init(&pdata->mtx_lock, "Coresight Platform Data", NULL, MTX_DEF);
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TAILQ_INIT(&pdata->endpoints);
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coresight_fdt_get_cpu(node, pdata);
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coresight_fdt_get_ports(node, pdata);
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if (bootverbose)
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printf("Total ports: in %d out %d\n",
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pdata->in_ports, pdata->out_ports);
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return (pdata);
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}
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