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
145 lines
3.9 KiB
C
145 lines
3.9 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 BAE Systems, the University of Cambridge
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* Computer Laboratory, and Memorial University under DARPA/AFRL contract
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* FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
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* (TC) research program.
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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 <arm64/coresight/coresight_funnel.h>
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#include "coresight_if.h"
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#define FUNNEL_DEBUG
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#undef FUNNEL_DEBUG
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#ifdef FUNNEL_DEBUG
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#define dprintf(fmt, ...) printf(fmt, ##__VA_ARGS__)
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#else
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#define dprintf(fmt, ...)
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#endif
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static struct resource_spec funnel_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ -1, 0 }
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};
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static int
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funnel_init(device_t dev)
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{
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struct funnel_softc *sc;
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sc = device_get_softc(dev);
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if (sc->hwtype == HWTYPE_STATIC_FUNNEL)
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return (0);
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/* Unlock Coresight */
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bus_write_4(sc->res, CORESIGHT_LAR, CORESIGHT_UNLOCK);
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dprintf("Device ID: %x\n", bus_read_4(sc->res, FUNNEL_DEVICEID));
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return (0);
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}
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static int
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funnel_enable(device_t dev, struct endpoint *endp,
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struct coresight_event *event)
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{
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struct funnel_softc *sc;
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uint32_t reg;
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sc = device_get_softc(dev);
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if (sc->hwtype == HWTYPE_STATIC_FUNNEL)
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return (0);
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reg = bus_read_4(sc->res, FUNNEL_FUNCTL);
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reg &= ~(FUNCTL_HOLDTIME_MASK);
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reg |= (7 << FUNCTL_HOLDTIME_SHIFT);
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reg |= (1 << endp->reg);
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bus_write_4(sc->res, FUNNEL_FUNCTL, reg);
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return (0);
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}
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static void
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funnel_disable(device_t dev, struct endpoint *endp,
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struct coresight_event *event)
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{
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struct funnel_softc *sc;
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uint32_t reg;
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sc = device_get_softc(dev);
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if (sc->hwtype == HWTYPE_STATIC_FUNNEL)
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return;
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reg = bus_read_4(sc->res, FUNNEL_FUNCTL);
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reg &= ~(1 << endp->reg);
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bus_write_4(sc->res, FUNNEL_FUNCTL, reg);
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}
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int
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funnel_attach(device_t dev)
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{
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struct coresight_desc desc;
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struct funnel_softc *sc;
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sc = device_get_softc(dev);
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if (sc->hwtype == HWTYPE_FUNNEL &&
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bus_alloc_resources(dev, funnel_spec, &sc->res) != 0) {
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device_printf(dev, "cannot allocate resources for device\n");
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return (ENXIO);
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}
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desc.pdata = sc->pdata;
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desc.dev = dev;
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desc.dev_type = CORESIGHT_FUNNEL;
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coresight_register(&desc);
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return (0);
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}
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static device_method_t funnel_methods[] = {
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/* Coresight interface */
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DEVMETHOD(coresight_init, funnel_init),
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DEVMETHOD(coresight_enable, funnel_enable),
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DEVMETHOD(coresight_disable, funnel_disable),
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DEVMETHOD_END
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};
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DEFINE_CLASS_0(funnel, funnel_driver, funnel_methods,
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sizeof(struct funnel_softc));
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