diff options
Diffstat (limited to 'sys/arm64/coresight/coresight_funnel.c')
| -rw-r--r-- | sys/arm64/coresight/coresight_funnel.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/sys/arm64/coresight/coresight_funnel.c b/sys/arm64/coresight/coresight_funnel.c new file mode 100644 index 000000000000..2eb588f18366 --- /dev/null +++ b/sys/arm64/coresight/coresight_funnel.c @@ -0,0 +1,144 @@ +/*- + * Copyright (c) 2018-2020 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * This software was developed by BAE Systems, the University of Cambridge + * Computer Laboratory, and Memorial University under DARPA/AFRL contract + * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing + * (TC) research program. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/rman.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <machine/bus.h> + +#include <arm64/coresight/coresight.h> +#include <arm64/coresight/coresight_funnel.h> + +#include "coresight_if.h" + +#define FUNNEL_DEBUG +#undef FUNNEL_DEBUG + +#ifdef FUNNEL_DEBUG +#define dprintf(fmt, ...) printf(fmt, ##__VA_ARGS__) +#else +#define dprintf(fmt, ...) +#endif + +static struct resource_spec funnel_spec[] = { + { SYS_RES_MEMORY, 0, RF_ACTIVE }, + { -1, 0 } +}; + +static int +funnel_init(device_t dev) +{ + struct funnel_softc *sc; + + sc = device_get_softc(dev); + if (sc->hwtype == HWTYPE_STATIC_FUNNEL) + return (0); + + /* Unlock Coresight */ + bus_write_4(sc->res, CORESIGHT_LAR, CORESIGHT_UNLOCK); + dprintf("Device ID: %x\n", bus_read_4(sc->res, FUNNEL_DEVICEID)); + + return (0); +} + +static int +funnel_enable(device_t dev, struct endpoint *endp, + struct coresight_event *event) +{ + struct funnel_softc *sc; + uint32_t reg; + + sc = device_get_softc(dev); + if (sc->hwtype == HWTYPE_STATIC_FUNNEL) + return (0); + + reg = bus_read_4(sc->res, FUNNEL_FUNCTL); + reg &= ~(FUNCTL_HOLDTIME_MASK); + reg |= (7 << FUNCTL_HOLDTIME_SHIFT); + reg |= (1 << endp->reg); + bus_write_4(sc->res, FUNNEL_FUNCTL, reg); + + return (0); +} + +static void +funnel_disable(device_t dev, struct endpoint *endp, + struct coresight_event *event) +{ + struct funnel_softc *sc; + uint32_t reg; + + sc = device_get_softc(dev); + if (sc->hwtype == HWTYPE_STATIC_FUNNEL) + return; + + reg = bus_read_4(sc->res, FUNNEL_FUNCTL); + reg &= ~(1 << endp->reg); + bus_write_4(sc->res, FUNNEL_FUNCTL, reg); +} + +int +funnel_attach(device_t dev) +{ + struct coresight_desc desc; + struct funnel_softc *sc; + + sc = device_get_softc(dev); + if (sc->hwtype == HWTYPE_FUNNEL && + bus_alloc_resources(dev, funnel_spec, &sc->res) != 0) { + device_printf(dev, "cannot allocate resources for device\n"); + return (ENXIO); + } + + desc.pdata = sc->pdata; + desc.dev = dev; + desc.dev_type = CORESIGHT_FUNNEL; + coresight_register(&desc); + + return (0); +} + +static device_method_t funnel_methods[] = { + /* Coresight interface */ + DEVMETHOD(coresight_init, funnel_init), + DEVMETHOD(coresight_enable, funnel_enable), + DEVMETHOD(coresight_disable, funnel_disable), + DEVMETHOD_END +}; + +DEFINE_CLASS_0(funnel, funnel_driver, funnel_methods, + sizeof(struct funnel_softc)); |