riscv: Remove old qemu compatibility code

During early qemu development, the /soc node was marked as compatible
with "riscv-virtio-soc" instead of "simple-bus".

This was changed in qemu 53f54508dae6 in Sep 2018, and predates the
baseline required qemu version (5.0) for riscv by a wide margin.

The generic simplebus code handles attachment in all cases nowadays.

Sponsored by:	Tag1 Consulting, Inc.
Reviewed by:	jrtc27, mhorne
Differential Revision:	https://reviews.freebsd.org/D30011

2 files changed, 0 insertions, 113 deletions

diff --git a/sys/conf/files.riscv b/sys/conf/files.riscv
index 7ecea016b9a3..c2d911cd68de 100644
--- a/sys/conf/files.riscv
+++ b/sys/conf/files.riscv
@@ -59,7 +59,6 @@ riscv/riscv/pmap.c		standard
 riscv/riscv/riscv_console.c	optional	rcons
 riscv/riscv/riscv_syscon.c	optional	ext_resources syscon riscv_syscon fdt
 riscv/riscv/sbi.c		standard
-riscv/riscv/soc.c		standard
 riscv/riscv/stack_machdep.c	optional	ddb | stack
 riscv/riscv/support.S		standard
 riscv/riscv/swtch.S		standard
diff --git a/sys/riscv/riscv/soc.c b/sys/riscv/riscv/soc.c
deleted file mode 100644
index 52d9c64a03de..000000000000
--- a/sys/riscv/riscv/soc.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/*-
- * 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 {
-	struct simplebus_softc	simplebus_sc;
-	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);