Alpha 8200: add a dummy driver for TLSB CPU nodes. Not so dummy, actually,

as you have to hook a GBus into it.

1 files changed, 121 insertions, 0 deletions

diff --git a/sys/alpha/tlsb/tlsbcpu.c b/sys/alpha/tlsb/tlsbcpu.c
new file mode 100644
index 0000000..40fc028
--- /dev/null
+++ b/sys/alpha/tlsb/tlsbcpu.c
@@ -0,0 +1,121 @@
+/* $FreeBSD$ */
+
+/*
+ * Copyright (c) 1997, 2000 by Matthew Jacob
+ * NASA AMES Research Center.
+ * All rights reserved.
+ *
+ * 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 immediately at the beginning of the file, without modification,
+ *    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.
+ */
+
+/*
+ * Node for TLSB CPU Modules found on
+ * AlphaServer 8200 and 8400 systems.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/malloc.h>
+
+#include <machine/rpb.h>
+#include <machine/cpuconf.h>
+
+#include <alpha/tlsb/tlsbreg.h>
+#include <alpha/tlsb/tlsbvar.h>
+
+#define	KV(_addr)	((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
+
+/*
+ * Device methods
+ */
+static int tlsbcpu_probe(device_t);
+
+static device_method_t tlsbcpu_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		tlsbcpu_probe),
+	DEVMETHOD(device_attach,	bus_generic_attach),
+	DEVMETHOD(device_detach,	bus_generic_detach),
+	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
+
+	/* Bus interface */
+	DEVMETHOD(bus_print_child,	bus_generic_print_child),
+	DEVMETHOD(bus_read_ivar,	bus_generic_read_ivar),
+	DEVMETHOD(bus_write_ivar,	bus_generic_write_ivar),
+	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
+	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
+
+	{ 0, 0 }
+};
+
+static devclass_t tlsbcpu_devclass;
+static driver_t tlsbcpu_driver = {
+	"tlsbcpu", tlsbcpu_methods, 1
+};
+
+static int
+tlsbcpu_probe(device_t dev)
+{
+	u_int32_t vid;
+	device_t child;
+	static int inst = 0;
+	struct tlsb_device *tdev = DEVTOTLSB(dev);
+
+	/*
+	 * Deal with hooking CPU instances to TurboLaser nodes.
+	 */
+	if (!TLDEV_ISCPU(tdev->td_tldev)) {
+		return (-1);
+	}
+
+	vid = TLSB_GET_NODEREG(tdev->td_node, TLVID) & TLVID_VIDA_MASK;
+	vid >>= TLVID_VIDA_SHIFT;
+
+	/*
+	 * If this is the primary CPU (unit 0 for us), then
+	 * attach a gbus. Otherwise don't. This is bogus,
+	 * but sufficent for now.
+	 */
+	if (device_get_unit(dev) != 0) {
+		return (0);
+	}
+
+	/*
+	 * Hook in the first CPU unit.
+	 */
+	tlsb_primary_cpu = tdev;
+	TLSB_PUT_NODEREG(tdev->td_node, TLCPUMASK, (1 << vid));
+
+	/*
+	 * Attach gbus.
+	 */
+	child = device_add_child(dev, "gbus", inst++);
+	if (child == NULL) {
+		return (-1);
+	}
+	device_set_ivars(child, tdev);
+	return (0);
+}
+DRIVER_MODULE(tlsbcpu, tlsb, tlsbcpu_driver, tlsbcpu_devclass, 0, 0);