Add in a first pass at Alpha 4100 (Rawhide) support. It doesn't quite

boot all the way yet, but it's darn close (blows up somewhere probing
the PS/2 mouse on the EISA bus).

1 files changed, 287 insertions, 0 deletions

diff --git a/sys/alpha/mcbus/mcbus.c b/sys/alpha/mcbus/mcbus.c
new file mode 100644
index 0000000..4f8e463
--- /dev/null
+++ b/sys/alpha/mcbus/mcbus.c
@@ -0,0 +1,287 @@
+/* $FreeBSD$ */
+/*
+ * Copyright (c) 2000 by Matthew Jacob
+ * 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.
+ */
+
+/*
+ * Autoconfiguration and support routines for the main backplane bus
+ * for Rawhide (Alpha 4100) 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/mcbus/mcbusreg.h>
+#include <alpha/mcbus/mcbusvar.h>
+
+struct mcbus_device *mcbus_primary_cpu = NULL;
+
+#define KV(_addr)	((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
+#define	NO_MCPCIA_AT(mid, gid) \
+	(badaddr((void *)KV(MCPCIA_BRIDGE_ADDR(gid, mid)), sizeof (u_int32_t)))
+
+struct mcbus_softc {
+	device_t	mcbus_dev;
+	driver_intr_t * sub_intr;
+	u_int8_t	mcbus_types[MCBUS_MID_MAX];
+};
+
+static void mcbus_add_child(struct mcbus_softc *, struct mcbus_device *);
+static void mcbus_intr(void *, u_long);
+
+static struct mcbus_softc *	mcbus0_softc = NULL;
+static devclass_t		mcbus_devclass;
+
+/*
+ * Device methods
+ */
+static int mcbus_probe(device_t);
+static int mcbus_print_child(device_t, device_t);
+static int mcbus_read_ivar(device_t, device_t, int, u_long *);
+static int mcbus_setup_intr(device_t, device_t, struct resource *, int,
+    driver_intr_t *, void *, void **);
+static int
+mcbus_teardown_intr(device_t, device_t, struct resource *, void *);
+
+static device_method_t mcbus_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		mcbus_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,	mcbus_print_child),
+	DEVMETHOD(bus_read_ivar,	mcbus_read_ivar),
+	DEVMETHOD(bus_write_ivar,	bus_generic_write_ivar),
+	DEVMETHOD(bus_setup_intr,	mcbus_setup_intr),
+	DEVMETHOD(bus_teardown_intr,	mcbus_teardown_intr),
+
+	{ 0, 0 }
+};
+
+static driver_t mcbus_driver = {
+	"mcbus", mcbus_methods, sizeof (struct mcbus_softc),
+};
+
+/*
+ * Tru64 UNIX (formerly Digital UNIX (formerly DEC OSF/1)) probes for MCPCIAs
+ * in the following order:
+ *
+ *	5, 4, 7, 6
+ *
+ * This is so that the built-in CD-ROM on the internal 53c810 is always
+ * dka500.  We probe them in the same order, for consistency.
+ */
+static const int mcbus_mcpcia_probe_order[] = { 5, 4, 7, 6 };
+
+/*
+ * At 'probe' time, we add all the devices which we know about to the
+ * bus.  The generic attach routine will probe and attach them if they
+ * are alive.
+ */
+static int
+mcbus_probe(device_t dev)
+{
+	struct mcbus_softc *sc = device_get_softc(dev);
+	struct mcbus_device *mdev;
+	int i, mid, gid;
+
+	device_set_desc(dev, "MCBUS Backplane Bus");
+
+	/*
+	 * XXX A note about GIDs...
+	 * XXX If we ever support more than one MCBUS, we'll
+	 * XXX have to probe for them, and map them to unit
+	 * XXX numbers.
+	 */
+
+	sc->mcbus_dev = dev;
+	mcbus0_softc = sc;
+	set_iointr(mcbus_intr);
+	gid = MCBUS_GID_FROM_INSTANCE(0);
+
+	mcbus0_softc->mcbus_types[0] = MCBUS_TYPE_RES;
+	for (mid = 1; mid <= MCBUS_MID_MAX; mid++) {
+		mcbus0_softc->mcbus_types[mid] = MCBUS_TYPE_UNK;
+	}
+
+	/*
+	 * First, add 'memory' children to probe.
+	 */
+	mdev = (struct mcbus_device *)
+	    malloc(sizeof (struct mcbus_device), M_DEVBUF, M_NOWAIT);
+	if (!mdev) {
+		printf("mcbus_probe: unable to malloc softc for memory dev\n");
+		return (ENOMEM);
+	}
+	mdev->ma_gid = gid;
+	mdev->ma_mid = 1;
+	mdev->ma_order = MCPCIA_PER_MCBUS;
+	mdev->ma_type = MCBUS_TYPE_MEM;
+	mcbus0_softc->mcbus_types[1] = MCBUS_TYPE_MEM;
+	mcbus_add_child(sc, mdev);
+
+	/*
+	 * Now add I/O (MCPCIA) modules to probe (but only if they're there).
+	 */
+	for (i = 0; i < MCPCIA_PER_MCBUS; ++i) {
+		mid = mcbus_mcpcia_probe_order[i];
+
+		if (NO_MCPCIA_AT(mid, gid)) {
+			continue;
+		}
+		mdev = (struct mcbus_device *)
+		    malloc(sizeof (struct mcbus_device), M_DEVBUF, M_NOWAIT);
+		if (!mdev) {
+			printf("mcbus_probe: unable to malloc for MCPCIA\n");
+			continue;
+		}
+		mdev->ma_gid = gid;
+		mdev->ma_mid = mid;
+		mdev->ma_order = i;
+		mdev->ma_type = MCBUS_TYPE_PCI;
+		mcbus0_softc->mcbus_types[1] = MCBUS_TYPE_PCI;
+		mcbus_add_child(sc, mdev);
+	}
+
+	/*
+	 * XXX: ToDo Add CPU nodes.
+	 */
+
+	return (0);
+}
+
+static int
+mcbus_print_child(device_t dev, device_t child)
+{
+	struct mcbus_device *mdev = DEVTOMCBUS(child);
+	int retval = 0;
+
+	retval += bus_print_child_header(dev, child);
+	retval += printf(" at %s gid %d mid %d\n",
+	    device_get_nameunit(dev), mdev->ma_gid, mdev->ma_mid);
+	return (retval);
+}
+
+static int
+mcbus_read_ivar(device_t dev, device_t child, int index, u_long *result)
+{
+	struct mcbus_device *mdev = DEVTOMCBUS(child);
+
+	switch (index) {
+	case MCBUS_IVAR_MID:
+		*result = mdev->ma_mid;
+		break;
+
+	case MCBUS_IVAR_GID:
+		*result = mdev->ma_gid;
+		break;
+
+	case MCBUS_IVAR_TYPE:
+		*result = mdev->ma_type;
+		break;
+
+	}
+	return (ENOENT);
+}
+
+static int
+mcbus_setup_intr(device_t dev, device_t child, struct resource *r, int f,
+    driver_intr_t *intr, void *a, void **ac)
+{
+	if (strncmp(device_get_name(child), "mcpcia", 6) == 0) {
+		if (mcbus0_softc->sub_intr == NULL)
+			mcbus0_softc->sub_intr = intr;
+		return (0);
+	} else {
+		return (ENXIO);
+	}
+}
+
+static int
+mcbus_teardown_intr(device_t dev, device_t child, struct resource *i, void *c)
+{
+	if (strncmp(device_get_name(child), "mcpcia", 6) == 0) {
+		mcbus0_softc->sub_intr = NULL;
+		return (0);
+	} else {
+		return (ENXIO);
+	}
+}
+
+static void
+mcbus_intr(void *frame, u_long vector)
+{
+	if (vector && mcbus0_softc->sub_intr)
+		(*mcbus0_softc->sub_intr)((void *)vector);
+}
+
+static void
+mcbus_add_child(struct mcbus_softc *mcbus, struct mcbus_device *mdev)
+{
+	static int mcpciaproto, memproto, cpuproto;
+	device_t cd;
+	int un;
+	char *dn, *ds;
+
+	switch (mdev->ma_type) {
+	case MCBUS_TYPE_PCI:
+		dn = "mcpcia";
+		ds = "MCPCIA PCI Bus Bridge";
+		un = mcpciaproto++;
+		break;
+	case MCBUS_TYPE_MEM:
+		dn = "mcmem";
+		un = memproto++;
+		ds = "MCBUS Memory Module";
+		break;
+	case MCBUS_TYPE_CPU:
+		dn = "mccpu";
+		un = cpuproto++;
+		ds = "MCBUS Processor Module";
+		break;
+	default:
+		printf("mcbus_add_child: unknown MCBUS type 0x%x\n",
+		    mdev->ma_type);
+		return;
+	}
+
+	cd = device_add_child_ordered(mcbus->mcbus_dev, mdev->ma_type, dn, un);
+	if (cd == NULL) {
+		return;
+	}
+	device_set_ivars(cd, mdev);
+	device_set_desc(cd, ds);
+}
+DRIVER_MODULE(mcbus, root, mcbus_driver, mcbus_devclass, 0, 0);