Date: Tue, 12 Jun 2018 17:07:31 +0000 (UTC) From: Ruslan Bukin <br@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r335006 - in head/sys: conf riscv/riscv Message-ID: <201806121707.w5CH7VnT009837@repo.freebsd.org>
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Author: br Date: Tue Jun 12 17:07:30 2018 New Revision: 335006 URL: https://svnweb.freebsd.org/changeset/base/335006 Log: Add simplebus-like RISC-V SoC bus. This is required in order to probe and attach devices described under "riscv-virtio-soc" node of DTS. Sponsored by: DARPA, AFRL Added: head/sys/riscv/riscv/soc.c (contents, props changed) Modified: head/sys/conf/files.riscv Modified: head/sys/conf/files.riscv ============================================================================== --- head/sys/conf/files.riscv Tue Jun 12 16:47:33 2018 (r335005) +++ head/sys/conf/files.riscv Tue Jun 12 17:07:30 2018 (r335006) @@ -46,6 +46,7 @@ riscv/riscv/nexus.c standard riscv/riscv/ofw_machdep.c optional fdt riscv/riscv/pmap.c standard riscv/riscv/riscv_console.c optional rcons +riscv/riscv/soc.c standard riscv/riscv/stack_machdep.c optional ddb | stack riscv/riscv/support.S standard riscv/riscv/swtch.S standard Added: head/sys/riscv/riscv/soc.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/riscv/riscv/soc.c Tue Jun 12 17:07:30 2018 (r335006) @@ -0,0 +1,111 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2018 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * This software was developed by SRI International and the University of + * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237 + * ("CTSRD"), as part of the DARPA CRASH research programme. + * + * 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/kernel.h> +#include <sys/module.h> + +#include <dev/fdt/simplebus.h> +#include <dev/ofw/ofw_bus_subr.h> + +struct soc_softc { + device_t dev; +}; + +static int +soc_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (!ofw_bus_is_compatible(dev, "riscv-virtio-soc")) + return (ENXIO); + + device_set_desc(dev, "RISC-V SoC"); + + return (BUS_PROBE_DEFAULT); +} + +static int +soc_attach(device_t dev) +{ + struct soc_softc *sc; + phandle_t node; + + sc = device_get_softc(dev); + sc->dev = dev; + + node = ofw_bus_get_node(dev); + if (node == -1) + return (ENXIO); + + simplebus_init(dev, node); + + /* + * Allow devices to identify. + */ + bus_generic_probe(dev); + + /* + * Now walk the OFW tree and attach top-level devices. + */ + for (node = OF_child(node); node > 0; node = OF_peer(node)) + simplebus_add_device(dev, node, 0, NULL, -1, NULL); + + return (bus_generic_attach(dev)); +} + +static int +soc_detach(device_t dev) +{ + + return (0); +} + +static device_method_t soc_methods[] = { + DEVMETHOD(device_probe, soc_probe), + DEVMETHOD(device_attach, soc_attach), + DEVMETHOD(device_detach, soc_detach), + DEVMETHOD_END +}; + +DEFINE_CLASS_1(soc, soc_driver, soc_methods, sizeof(struct soc_softc), + simplebus_driver); +static devclass_t soc_devclass; +EARLY_DRIVER_MODULE(soc, simplebus, soc_driver, soc_devclass, 0, 0, + BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE); +MODULE_VERSION(soc, 1);
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